Category: Patents

LeiYan Gas Springs having patents for various gas spring products and production equipments.

Posted by: harry | on January 17, 2025

a balancing gas spring equipped with an elastic stopping element

Patent No.:CN211975745U Date:2020-03-20

Google Patent: https://patents.google.com/patent/CN211975745U/en?oq=CN211975745U

Abstract

A balancing gas spring equipped with an elastic stopping element comprises: a sealing component, a piston rod body, and an elastic stopping element. The elastic stopping element includes: a piston assembly, a piston cap, and an airflow control component. The piston assembly comprises: a piston body and a rubber O-ring seal. The piston body has a groove for placing the rubber O-ring seal, which is used to restrict the movement distance of the O-ring. The piston body also has a longitudinal through hole. One end of the hole leads to the side away from the piston cap, while the other end leads to the airflow control component. A transverse damping hole is also provided in the middle of the longitudinal through hole, leading to the groove for placing the rubber O-ring seal. This utility model’s elastic stopping element has a simple structure and components that are easy to process, making it applicable in various fields.

Description

Technical Field

This utility model relates to the field of balancing gas springs, specifically to a balancing gas spring equipped with an elastic stopping element.

Background Technology

A gas spring can perform functions such as support, buffering, braking, height adjustment, and angle adjustment. It consists of the following parts: pressure cylinder, piston rod, piston, sealing guide sleeve, filling material (inert gas or oil-gas mixture), internal and external control elements (refers to controllable gas springs), and joints. The principle is to fill the enclosed pressure cylinder with an inert gas or oil-gas mixture, making the pressure inside the chamber several or even dozens of times higher than atmospheric pressure. The movement of the piston rod is realized by the pressure difference caused by the difference in the cross-sectional area between the piston rod and the piston.

Due to the fundamental difference in principles, gas springs have significant advantages over ordinary springs: relatively slow speed, minimal dynamic force variation (usually within 1:1.2), and easy control.

As the application of gas springs expands, the use of balancing gas springs also demands multi-field applications, such as the high-pressure micro-adjustment valve based on an air spring disclosed in application number CN201711296002.X. The air spring’s chamber is connected to the welding base of the air spring chamber using argon arc welding. A locking cover is provided on the upper part of the air spring chamber. The bottom end of the air spring is connected to the air spring seat through a first inner hexagon bolt, placed in the air spring chamber. A return spring is placed between the air spring seat and the welded base of the air spring chamber. The upper end of the valve fixing seat is connected to the welding base of the air spring chamber through a second inner hexagon bolt. The adjustment valve is installed at the lower end of the valve fixing seat. The adjustment valve is connected to the air spring seat through a valve coupler and a limited connecting shaft.

Another example, as disclosed in application number CN201920474811.3, is a nitrogen gas spring structure comprising a cylinder, a piston rod, and an intermediate sleeve. The cylinder has a cylinder hole, and the intermediate sleeve is sealedly connected to the upper inner wall of the cylinder hole. The piston rod is slidingly and sealingly connected to the inner hole of the intermediate sleeve. The cylinder hole is filled with high-pressure nitrogen gas. The inner end of the piston rod has at least two stepped bosses, and the inner wall of the intermediate sleeve has inwardly extending stopping bosses and limiting bosses. A Y-shaped sealing ring is provided in the sealing ring groove, and the outer periphery of the intermediate sleeve has an annular pressure relief thin-walled boss.

The outer end of the piston rod has at least one inclined force surface. The bottom of the cylinder hole is provided with an installation hole, wherein a plug installation seat is fixed, and a plug blind hole is provided on the plug installation seat, extending towards the cylinder hole.

The above-mentioned gas spring structures are complex in piston assembly, with high component processing difficulty, making it hard to meet the application demands across various fields.

Summary of the Utility Model

This utility model aims to provide a balancing gas spring equipped with an elastic stopping element. The piston rod includes: a sealing component with a sealed chamber, a piston rod body with one end set inside the sealed chamber of the sealing component and the other end outside the sealing component, and an elastic stopping element fixedly connected to the piston rod body inside the sealing component. The elastic stopping element includes: a piston assembly fixedly set on the piston rod body, a piston cap fixedly connected to one end of the piston assembly and the piston rod body, and an airflow control component set between the piston assembly and the piston cap.

Specifically, the piston assembly includes: a piston body that is spaced from the inner wall of the sealing component, and a rubber O-ring seal set on the piston body to block the gas flow. The piston body features a groove for placing the rubber O-ring seal, which restricts the movement distance of the O-ring, forming sealing surfaces on both sides of the groove. The piston body also has a longitudinal through hole, with one end leading to the side away from the piston cap and the other end leading to the airflow control component. A transverse damping hole is also provided in the middle of the longitudinal through hole, leading to the groove for placing the rubber O-ring seal and connecting with the longitudinal through hole.

In one embodiment, an installation recessed step groove is provided at the connection between the piston cap and the piston assembly. This installation recessed step groove is used to assemble the airflow control component. One side of the installation recessed step groove has an opening that forms a gap between the sealed chamber and the piston body.
In another embodiment, at least two longitudinal through holes are arranged annularly and equidistantly on the piston body.
In another embodiment, the airflow control component includes a sealing diaphragm placed on the longitudinal through hole to seal it, and an elastic pressure ring set on the side of the sealing diaphragm away from the longitudinal through hole to provide closing resistance to the sealing diaphragm.
In another embodiment, both the elastic pressure ring and the rubber O-ring seal are made of elastic deformation material.
In another embodiment, the elastic pressure ring is set as a constant circular ring, and its cross-section can be round or square.
In another embodiment, both the piston cap and the piston body are provided with installation holes at the corresponding positions. These installation holes are used to fixedly assemble the elastic stopping element with the piston rod body.
In another embodiment, a step thread or spin riveting structure is provided at the connection between the piston rod body and the piston cap. This step structure limits the displacement of the piston cap.
In another embodiment, the sealing component includes a sleeve, a guiding sealing system set at one end of the sleeve, and a rear block set at the other end of the sleeve. The elastic stopping element is set inside the sleeve. One end of the piston rod body is connected to the elastic stopping element, and the other end passes through the guiding sealing system to the outside.
In another embodiment, the guiding sealing system includes a limiting element and an O-ring seal set on the limiting element. The limiting element prevents the piston rod body from wobbling during displacement, and the O-ring seal ensures airtightness inside the sleeve when the piston rod body moves.
The balancing gas spring with an elastic stopping element has a simple structure and low component processing difficulty, making it applicable in various fields.

Description of Drawings
To better illustrate the embodiments of this utility model or the technical solutions in the prior art, the figures used in the description of the embodiments or the prior art will be briefly introduced below. It is obvious that the figures described below are only some embodiments of this utility model. For those skilled in the art, without creative work, other figures can also be obtained based on the structures shown in these figures.

Figure Descriptions

Figure 1: Schematic diagram of the overall structure of the utility model.

Figure 2: Overall schematic diagram of the elastic stopping element in this utility model.

Figure 3: Schematic diagram of the piston assembly of the elastic stopping element.

Figure 4: Schematic diagram of the gas flow direction in the extended state of the elastic stopping element.

Figure 5: Schematic diagram of the gas flow direction in the compressed state of the elastic stopping element.

Figure 6: Schematic diagram of the piston body with a longitudinal through hole in the elastic stopping element.

Figure 7: Schematic diagram of the airflow control component structure in the elastic stopping element.

Specific Embodiments

It should be noted that all direction indications in this utility model (such as up, down, left, right, front, rear, inside, outside, center…) are only used to explain the relative positional relationships, movement conditions, etc., between parts under a specific posture (as shown in the attached figures). If the specific posture changes, the directional indications will also correspondingly change.

In this utility model, unless otherwise explicitly specified and defined, the terms “connected” and “fixed” should be broadly interpreted. For example, “fixed” can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediary; it can be the internal communication between two elements or the interaction relationship between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meanings of the above terms in this utility model based on specific situations.

Furthermore, the technical solutions in various embodiments of this utility model can be combined with each other, but the combination must be based on the capability of those skilled in the art. When the combination of technical solutions results in contradictions or cannot be realized, it should be considered that such a combination does not exist and is not within the scope of protection of this utility model.

Refer to Figures 1 to 3 for a balancing gas spring with an elastic stopping element. The piston rod includes: a sealing component 2 with a sealed chamber 10, a piston rod body 3 with one end set inside the sealing component 2 and the other end outside the sealing component 2, and an elastic stopping element 1 connected with the piston rod body 3 inside the sealing component 2. The elastic stopping element 1 is set inside the sealed chamber 10 and includes: a piston assembly 11 fixed on the piston rod body 3, a piston cap 12 at one end of the piston assembly 11, and an airflow control component 13 set between the piston assembly 11 and the piston cap 12;

The piston assembly 11 includes: a piston body 111 that is spaced from the inner wall of the sealed chamber 10, and a rubber O-ring seal 112 set on the piston body 111 to block the gas flow. The piston body 111 features a groove 113 for placing the rubber O-ring seal 112. The groove 113 restricts the movement distance of the O-ring 112, forming sealing surfaces on both sides of the groove 113. The sealing surfaces include the O-ring 112 engaging with the inner wall of the sealed chamber 10, the groove 113 bottom, and the side end face of the groove 113 on the piston body 111, creating a three-point seal.

The piston body 111 is also provided with a longitudinal through hole 114. One end of the longitudinal through hole 114 leads to the side away from the piston cap 12, while the other end leads to the airflow control component 13. A transverse damping hole 115 is also provided in the middle of the longitudinal through hole 114, which leads to the rubber O-ring groove 113. When the rubber O-ring 112 is at either end of the groove 113, it needs to expose the transverse damping hole 115 to facilitate ventilation.

The elastic stopping element 1 separates the sealed chamber 10 into a first chamber 6 and a second chamber 5, which can only allow gas flow through the longitudinal through hole 114. Without external forces applied, the gas pressure per unit area inside the first chamber 6 and the second chamber 5 is the same. Because the area of the piston cap 12 exposed to the first chamber 6 is smaller than the area of the piston body 111 exposed to the second chamber 5, there is always a thrust exerted by the elastic stopping element 1 that extends the piston rod body 3 and the elastic stopping element 1 outward. Referring to Figure 4, when the elastic stopping element 1 undergoes extension displacement from the piston body 111 towards the piston cap 12, the gas in the second chamber 5 flows to the position of the rubber O-ring 112 through the gap formed between the piston body 111 and the sealed chamber 10. The rubber O-ring 112 moves in the direction away from the piston cap 12, exposing the transverse damping hole 115, which connects the gap between the piston body 111 and the sealed chamber 10 with the longitudinal through hole 114. Based on the displacement distance of the elastic stopping element 1, a portion of the gas in the second chamber 5 transfers to the first chamber 6, maintaining the gas pressure balance between the two chambers through this gas transfer.

Referring to Figure 5, due to the initial thrust, the elastic stopping element 1 only undergoes compression displacement under external forces from the piston cap 12 towards the piston body 111. Gas flows from the longitudinal through hole 114 and the gap between the piston body 111 and the sealed chamber 10 to the airflow control component 13, which deforms under gas pressure to connect the first chamber 6 and the second chamber 5, maintaining the gas pressure balance between the two chambers.

The elastic stopping element 1 achieves the function of a balancing gas spring through a simple structure, with low component processing difficulty, meeting the application demands in different fields.

Preferably, the piston cap 12 and the piston assembly 11 are separately arranged. An installation recessed step groove 121 is provided at the connection between the piston cap 12 and the piston assembly 11, used to assemble the airflow control component 13. One side of the installation recessed step groove 121 has an opening 122 that communicates with the second chamber 5. Gas from the longitudinal through hole 114 flows through the opening 122 from the airflow control component 13 to connect with the second chamber 5.

Referring to Figure 6, at least two longitudinal through holes 114 are arranged annularly and equidistantly on the piston body 111. The equidistant arrangement of multiple longitudinal through holes 114 benefits the stable operation of the elastic stopping element 1, ensuring that it does not get stuck in the sealed chamber due to uneven gas pressure during displacement.

Referring to Figure 7, the airflow control component 13 includes a sealing diaphragm 131 placed on the longitudinal through hole 114 to seal it, and an elastic pressure ring 132 set on the side of the sealing diaphragm 131 away from the longitudinal through hole 114 to provide closing resistance to the sealing diaphragm 131.

By setting the sealing diaphragm 131 and the elastic pressure ring 132 to seal one side of the longitudinal through hole 114, during the extension displacement, the rubber O-ring 112 moves, connecting the second chamber 5 with the transverse damping hole 115. Gas from the second chamber 5 can only flow through the gap between the piston body 111 and the sealed chamber 10 to the transverse damping hole 115 at the position of the rubber O-ring 112, connecting the gap between the piston body 111 and the sealed chamber 10 with the longitudinal through hole 114, completing the gas flow from the second chamber 5 to the first chamber 6.

During compression displacement, the rubber O-ring 112 moves, closing the gap between the piston body 111 and the sealed chamber 10 that connects the transverse damping hole 115 with the second chamber 5. Gas flows from the longitudinal through hole 114 to the sealing diaphragm 131. Due to the interference fit between the sealing diaphragm 131 and the elastic pressure ring 132, the exit side of the longitudinal through hole 114 is also sealed, providing the required support balance force. Only by applying an external force to push the gas and open the sealing diaphragm 131 can gas from the first chamber 6 flow to the second chamber 5.

Further Details
By setting the contact area between the sealing diaphragm 131 and the elastic pressure ring 132 under pressure, the purpose of achieving a constant external force can be realized.

The elastic pressure ring 132 and the rubber O-ring 112 are both made of elastic deformation materials. They are annularly arranged, and their cross-sections can be circular or square.

Preferably, the corresponding positions of the piston cap 12 and the piston body 111 are provided with installation holes 14, which are used to assemble the elastic stopping element 1 with other devices.

The connection between the piston rod body 3 and the piston cap 12 is provided with a stepped structure 31, which limits the displacement of the piston cap 12.

Preferably, the piston rod body 3 is assembled with the elastic stopping element 1 through installation holes 14 provided on the piston body 111 and the piston cap 12.

Refer to Figure 1, the sealing component 2 includes: a sleeve 21, a guiding sealing system 22 at one end of the sleeve 21, and a rear block 23 at the other end of the sleeve 21. The elastic stopping element 1 is set inside the sleeve 21. One end of the piston rod body 3 is connected to the elastic stopping element 1, and the other end passes through the guiding sealing system 22 to the outside.

Further, the sleeve 21 is set as a hollow column, which can be cylindrical, square, or any other columnar shape. The elastic stopping element 1 is correspondingly set according to the hollow shape of the sleeve 21, ensuring that it always fits snugly with the inner wall of the sleeve 21.

Preferably, the guiding sealing system 22 includes a limiting element 221 and an O-ring 222 set on the limiting element 221. The limiting element 221 prevents the piston rod body 3 from wobbling during displacement, and the O-ring 222 ensures airtightness inside the sleeve 21 when the piston rod body 3 moves.

Preferably, the end of the piston rod body 3 away from the elastic stopping element 1 is provided with a connecting structure 4, which is used to connect the piston rod body 3 with other structures. Similarly, the end of the rear block 23 away from the elastic stopping element 1 is also provided with a connecting structure 4. Through this connecting structure 4, the piston rod can be mounted on other structures. For example, the connecting structure 4 at one end of the rear block 23 can be connected to a windowsill, while the connecting structure 4 at the other end of the piston rod body 3 can be connected to a window, achieving the function of a windowsill support rod. Additionally, the piston rod can be applied to other different fields through this connecting structure 4.

In one embodiment, a weight is set on the piston rod body 3 through the connecting structure 4. The gravity of the weight is equal in magnitude and opposite in direction to the initial thrust of the elastic stopping element 1, resulting in a balanced state of force for the elastic stopping element 1 when there are no additional forces applied.

In this balanced state of force, the elastic stopping element 1 remains stationary. Only when additional force is applied can the elastic stopping element 1 undergo displacement to perform extension or compression movements.

During the displacement process, the longitudinal through hole 114 of the elastic stopping element 1 connects the first chamber 6 and the second chamber 5, maintaining the gas pressure per unit area in both chambers at the same level. When the external force is removed, the displacement of the elastic stopping element 1 stops, and it remains in a balanced state of force.

The working principle of this utility model is to set the gas pressure in the first chamber 6 and the second chamber 5 of the piston rod to make the supporting force provided by the gas pressure in the first chamber 6 equal to or slightly less than the minimum weight of the support object. When the elastic stopping element 1 is compressed inward, the rubber O-ring 112 in the groove 113 moves to closely fit the side of the groove 113 near the piston rod body 3 and the inner wall of the sleeve 21, forming a seal for the first chamber 6. This seal holds the pressurized air in place, creating the required support balance force. Only by applying external pressure can the pressurized gas force the sealing diaphragm 6 to open, allowing the pressurized gas on both sides of the elastic stopping element 1 to flow into the first chamber 6, enabling the piston rod to perform the compression movement.

When the piston rod extends outward, the rubber O-ring 112 in the groove 113 moves to closely fit the side of the groove 113 near the first chamber 6 and the inner wall of the sleeve 21, forming a seal for the second chamber 5. The pressurized gas flows through the gap between the outer diameter of the elastic stopping element 1 and the inner diameter of the sleeve 21, then through the transverse damping hole 115 to the first chamber 6.

The above shows and describes the basic principles, main features, and advantages of this utility model. It should be understood by those skilled in the art that this utility model is not limited to the above embodiment. The embodiments and descriptions in the above are intended to explain the principles of this utility model. Various changes and improvements can be made without departing from the spirit and scope of this utility model, all of which fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims (10) – a balancing gas spring equipped with an elastic stopping element, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacture

A balancing gas spring equipped with an elastic stopping element, comprising: a sealing component with a sealed chamber, a piston rod body with one end set inside the sealed chamber of the sealing component and the other end outside the sealing component, and an elastic stopping element fixedly connected to the piston rod body inside the sealing component. The elastic stopping element includes: a piston assembly fixed on the piston rod body, a piston cap fixedly connected to one end of the piston assembly and the piston rod body, and an airflow control component set between the piston assembly and the piston cap.

The piston assembly includes: a piston body that is spaced from the inner wall of the sealing component and a rubber O-ring seal set on the piston body to block the gas flow. The piston body has a groove for placing the rubber O-ring seal, which restricts the movement distance of the O-ring and forms sealing surfaces on both sides of the groove. The piston body also has a longitudinal through hole, with one end leading to the side away from the piston cap and the other end leading to the airflow control component. A transverse damping hole is also provided in the middle of the longitudinal through hole, leading to the groove for placing the rubber O-ring seal and connecting with the longitudinal through hole.

The balancing gas spring equipped with an elastic stopping element as described in claim 1, wherein the connection between the piston cap and the piston assembly is provided with an installation recessed step groove, used to assemble the airflow control component. One side of the installation recessed step groove has an opening, forming a gap between the sealed chamber and the piston body.
The balancing gas spring equipped with an elastic stopping element as described in claim 1, wherein at least two longitudinal through holes are arranged annularly and equidistantly on the piston body.
The balancing gas spring equipped with an elastic stopping element as described in claim 1, wherein the airflow control component includes a sealing diaphragm placed on the longitudinal through hole to seal it, and an elastic pressure ring set on the side of the sealing diaphragm away from the longitudinal through hole to provide closing resistance.
The balancing gas spring equipped with an elastic stopping element as described in claim 4, wherein both the elastic pressure ring and the rubber O-ring seal are made of elastic deformation materials.
The balancing gas spring equipped with an elastic stopping element as described in claim 4, wherein the elastic pressure ring is set as a constant circular ring, and its cross-section can be round or square.
The balancing gas spring equipped with an elastic stopping element as described in claim 1, wherein the corresponding positions of the piston cap and the piston body are provided with installation holes, used to fixedly assemble the elastic stopping element with the piston rod body.
The balancing gas spring equipped with an elastic stopping element as described in claim 7, wherein the connection between the piston rod body and the piston cap is provided with a stepped thread or spin riveting structure, which limits the displacement of the piston cap.
The balancing gas spring equipped with an elastic stopping element as described in claim 1, wherein the sealing component includes: a sleeve, a guiding sealing system set at one end of the sleeve, and a rear block set at the other end of the sleeve. The elastic stopping element is set inside the sleeve. One end of the piston rod body is connected to the elastic stopping element, and the other end passes through the guiding sealing system to the outside.
The balancing gas spring equipped with an elastic stopping element as described in claim 9, wherein the guiding sealing system includes a limiting element and an O-ring seal set on the limiting element. The limiting element prevents the piston rod body from wobbling during displacement, and the O-ring seal ensures airtightness inside the sleeve when the piston rod body moves.

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Tags: balancing gas spring, leiyan gas spring patent

Posted by: harry | on January 16, 2025

damping compression gas spring that can stop doors and windows

Patent No.:CN211778709U Date:2019-07-10

Google Patent: https://patents.google.com/patent/CN211778709U/en?oq=CN211778709U

China Patent: http://epub.cnipa.gov.cn/

Abstract

This utility model discloses a damping compression gas spring that can stop doors and windows, including a cylinder, a rear end block, a guiding assembly, and a piston rod assembly. Several sections of bypass grooves are arranged on the inner sidewall of the cylinder, set at intervals along the axial direction of the cylinder.

The piston rod assembly includes a piston assembly and a piston rod, with the piston assembly dividing the cylinder into a front chamber and a rear chamber. The piston assembly includes a piston body; a flow channel is provided on the piston body to communicate the front and rear chambers. The piston body also has a first one-way sealing element that can open or close the flow channel.

In the axial direction of the cylinder, the length of each bypass groove is greater than the length of the contact part between the first one-way sealing element and the inner sidewall of the cylinder. This utility model has the advantages of a simple structure, convenience in use, and high compressive strength.

Technical Field

This utility model relates to the field of gas spring technology, specifically to a damping compression gas spring that can stop doors and windows.

Background Technology

A gas spring is an industrial component that can perform functions such as support, buffering, braking, height adjustment, and angle adjustment. It mainly consists of a pressure cylinder, piston rod, piston, sealing guide sleeve, filling material, and joints. The principle is to fill the enclosed pressure cylinder with an inert gas or oil-gas mixture, making the pressure inside the chamber several or even dozens of times higher than atmospheric pressure. The movement of the piston rod is realized by the pressure difference caused by the difference in the force area on both ends of the piston rod.

Currently, the gas springs on the market are mainly free type, which can only stop at the shortest or longest positions and cannot stop by themselves during the stroke, which has significant limitations, such as being unsuitable for controlling the opening and closing of doors and windows. Some self-locking and stay-type gas springs can stop at any position within the stroke, but this is generally achieved through a release mechanism or controller, increasing the difficulty of installation and debugging.

An existing example disclosed in Chinese Patent Application Number CN201120003352.4 describes a stoppable compression gas spring with a cylinder with axial damping grooves on the inner wall, a piston rod, and a rear end block fixedly sealed at the rear of the cylinder. The guide sleeve and sealing ring set are installed on the piston rod and within the cylinder, with one end of the piston rod extending out of the cylinder and another end having a piston. The piston is equipped with a damping ring at the rear of the oil passage, aligning with the axial damping grooves of the cylinder. The cylinder’s inner wall has more than one annular surface isolating the axial damping grooves, each composed of more than two independent damping grooves. Although this utility model has a simple structure and can meet the requirements of different work strokes, its compressive performance is poor, making it difficult to stabilize in different strokes and easy to compress back to a compressed state. It requires considerable effort to extend it, making it cumbersome and labor-intensive to use.

Summary of the Utility Model

This utility model aims to address the defects and shortcomings of existing technology by providing a damping compression gas spring that can stop doors and windows, offering the advantages of a simple structure, easy use, and high compressive strength.

The technical solution adopted to solve its technical problem is as follows: A damping compression gas spring that can stop doors and windows includes a cylinder, a rear end block, a guiding assembly, and a piston rod assembly. The guiding assembly is fixedly sealed at the front end of the cylinder, and the rear end block is fixedly sealed at the rear end of the cylinder. Several sections of bypass grooves are arranged on the inner sidewall of the cylinder, set at intervals along the axial direction of the cylinder.

The piston rod assembly includes a piston assembly that slidably and sealingly fits with the inner sidewall of the cylinder as well as a piston rod. The piston assembly divides the cylinder into a front chamber and a rear chamber, comprising a piston body fixed at the rear end of the piston rod. The front end of the piston rod extends out of the cylinder and slidably and sealingly fits with the guiding assembly. The piston body has a flow channel to communicate the front chamber and the rear chamber and a first one-way sealing element that can open or close the flow channel.

When the piston assembly moves towards the front end of the cylinder, the first one-way sealing element opens the flow channel. When the piston assembly moves towards the rear end of the cylinder, the first one-way sealing element closes the flow channel. The length of each bypass groove in the axial direction of the cylinder is greater than the length of the contact part between the first one-way sealing element and the inner sidewall of the cylinder.

Further Details

The side wall of the cylinder protrudes outward to form the bypass groove, making the structure simple and easy to manufacture.

The piston assembly also includes piston pads press-fitted each at one end of the piston body, both fitted with through holes corresponding to the flow channel, and a sealing friction ring that opens and closes the holes. When the piston assembly moves towards the front end of the cylinder, the sealing friction ring opens the holes. When the piston assembly moves towards the rear end, the sealing friction ring closes the holes.

Both ends of the piston body are provided with annular steps consisting of a step surface and a cylindrical surface, through which the flow channel passes. The sealing friction ring slidably fits the front cylindrical surface, and the first one-way sealing element slidably fits the rear cylindrical surface.

The first one-way sealing element uses a Y-shaped sealing ring with lips facing the rear end of the cylinder. The sealing element fits tightly with the cylindrical surface, enhancing the relative sealing of the front and rear chambers.

The guiding assembly includes a front guide sleeve fixed at the front end of the cylinder and a second one-way sealing element.

The second one-way sealing element uses a Y-shaped sealing ring with lips facing the rear end of the cylinder.

The outer end of the rear end block is fixed with a rear connector, and the front end of the piston rod is fixed with a front connector.

An O-ring is provided at the junction of the rear end block and the cylinder to improve the sealing of the inner cavity of the cylinder.

Benefits

By providing a flow channel communicating the front and rear chambers on the piston body, and a first one-way sealing element that opens and closes the flow channel: when the piston assembly moves towards the front end of the cylinder, it slides relative to the cylinder while the first one-way sealing element slides relative to the piston body, opening the flow channel. The gas in the front chamber quickly flows to the rear chamber, allowing the piston rod to extend easily and quickly.

When the piston assembly moves towards the rear end of the cylinder, the sliding of the piston body relative to the cylinder and the first one-way sealing element relative to the piston body closes the flow channel, preventing gas from flowing from the front chamber to the rear chamber, stopping the piston rod assembly from moving relative to the cylinder and enabling it to withstand higher pressure with strong compressive performance.

Additionally, the length of the bypass groove in the axial direction of the cylinder is greater than the length of the contact part between the sealing element and the inner wall of the cylinder, allowing the piston rod assembly to stop at any position along the axial direction of the cylinder, with strong compressive performance. Overall, this utility model has the advantages of simple structure, ease of use, and high compressive strength.

Description of Drawings

Fig. 1: Schematic diagram of the overall structure of the utility model. Fig. 2: Enlarged schematic diagram of the guiding assembly in this utility model. Fig. 3: Schematic diagram of the flow channel closing in this utility model. Fig. 4: Schematic diagram of the flow channel opening in this utility model. Fig. 5: Cross-sectional schematic diagram of the cylinder in this utility model.

Legend: 1 – Cylinder; 11 – Bypass Groove; 2 – Rear End Block; 3 – Guiding Assembly; 31 – Front Guide Sleeve; 32 – Second One-Way Sealing Element; 4 – Piston Rod Assembly; 41 – Piston Assembly; 411 – Piston Body; 4111 – Flow Channel; 4112 – Annular Step; 412 – First One-Way Sealing Element; 413 – Piston Pad; 4131 – Through Hole; 414 – Sealing Friction Ring; 42 – Piston Rod; 5 – Front Chamber; 6 – Rear Chamber; 7 – Rear Connector; 8 – Front Connector; 9 – O-Ring.

Specific Embodiments

For a more intuitive and complete understanding of the technical solution of this utility model, the non-restrictive feature description in conjunction with the attached figures is as follows:

As shown in Figures 1 to 5, a damping compression gas spring that can stop doors and windows includes a cylinder 1, a rear end block 2, a guiding assembly 3, and a piston rod assembly 4. The guiding assembly 3 is fixedly sealed at the front end of the cylinder 1, and the rear end block 2 is fixedly sealed at the rear end of the cylinder 1. Several sections of bypass grooves 11 are arranged on the inner sidewall of the cylinder 1, set at intervals along the axial direction of the cylinder 1. The piston rod assembly 4 includes a piston assembly 41 that slidably and sealingly fits with the inner sidewall of the cylinder 1 as well as a piston rod 42. The piston assembly 41 divides the cylinder 1 into a front chamber 5 and a rear chamber 6. The piston assembly 41 includes a piston body 411, fixed at the rear end of the piston rod 42. The front end of the piston rod 42 extends out of the cylinder 1 and slidably and sealingly fits with the guiding assembly 3. The piston body 411 has a flow channel 4111 to communicate the front chamber 5 and the rear chamber 6, and a first one-way sealing element 412 that can open or close the flow channel 4111. When the piston assembly 41 moves towards the front end of the cylinder 1, the first one-way sealing element 412 opens the flow channel 4111. When the piston assembly 41 moves towards the rear end of the cylinder 1, the first one-way sealing element 412 closes the flow channel 4111. The length of each bypass groove 11 in the axial direction of the cylinder 1 is greater than the length of the contact part between the first one-way sealing element 412 and the inner wall of the cylinder 1.

Specifically, inert gas nitrogen is filled in both the front chamber 5 and the rear chamber 6 of the cylinder 1.

The side wall of the cylinder 1 protrudes outward to form the bypass grooves 11 through a riveting or stamping process, making it easy to manufacture.

The piston assembly 41 also includes piston pads 413 press-fitted each at one end of the piston body 411, both fitted with through holes 4131 corresponding to the flow channel 4111, and a sealing friction ring 414 that opens and closes the holes 4131. When the piston assembly 41 moves towards the front end of the cylinder 1, the sealing friction ring 414 opens the holes 4131. When the piston assembly 41 moves towards the rear end of the cylinder 1, the sealing friction ring 414 closes the holes 4131.

Preferably, during installation, the components are successively sleeved onto the rear end of the piston rod 42 in the order of: piston pad 413, piston body 411, first one-way sealing element 412, and piston pad 413, then fixed by a spinning riveting process, ensuring reliable connection and easy manufacturing and installation. The sealing friction ring 414 can be installed before or after the spinning riveting process.

Both ends of the piston body 411 are provided with annular steps 4112, which consist of a step surface and a cylindrical surface. The flow channel 4111 passes through the step surface, and the sealing friction ring 414 fits slidably with the front cylindrical surface, while the first one-way sealing element 412 fits slidably with the rear cylindrical surface. The first one-way sealing element 412 uses a Y-shaped sealing ring with lips facing the rear end of the cylinder 1. The sealing element fits tightly with the cylindrical surface, forming a cone surface to enhance the sealing of the front and rear chambers.

Specifically, the sealing friction ring 414 also uses a Y-shaped sealing ring with lips facing the rear end of the cylinder 1. The front cylindrical surface has a cone surface near the front step surface. When the sealing friction ring 414 opens the holes 4131, gas flows through the holes 4131, passing through this cone surface and the gap formed by the inner circle of the sealing friction ring 414, eventually flowing through the flow channel 4111 to the rear end of the piston body 411. The outer circle of the sealing friction ring 414 is cylindrical and fits slidably and sealingly with the cylinder 1, ensuring the relative sealing of the front chamber 5 and the rear chamber 6.

The guiding assembly 3 includes a front guide sleeve 31 fixed at the front end of the cylinder 1 and a second one-way sealing element 32, which uses a Y-shaped sealing ring with lips facing the rear end of the cylinder 1.

The outer end of the rear end block 2 is fixed with a rear connector 7, and the front end of the piston rod 42 is fixed with a front connector 8. Two O-rings 9 are provided at the junction of the rear end block 2 and the cylinder 1.

Preferably, the front guide sleeve 31 and the rear end block 2 are sealed to both ends of the cylinder 1 by a riveting process. Holes for connecting and installing the gas spring are provided on both the front connector 8 and the rear connector 7.

Working Principle

The specific working principle of this utility model is as follows: When extending the piston rod 42, during the extension process, the piston assembly 41 slides relative to the cylinder 1, and both the first one-way sealing element 412 and the sealing friction ring 414 slide relative to the annular steps 4112, with their lips facing the rear end of the cylinder 1. This opens the flow channel 4111 and the holes 4131, allowing nitrogen gas from the front chamber 5 to flow through the through holes 4131 on the front piston pad 413, the flow channel 4111, and the through holes 4131 on the rear piston pad 413 to the rear chamber 6, enabling the piston rod 42 to extend quickly and easily, as shown in Figure 4.

During use, when the piston rod 42 is under pressure, the piston assembly 41 slides relative to the cylinder 1, while the first one-way sealing element 412 and the sealing friction ring 414 slide relative to the annular steps 4112, with their lips facing the front end of the cylinder 1. This closes the flow channel 4111 and the holes 4131, preventing the nitrogen gas from flowing between the front chamber 5 and the rear chamber 6, keeping the piston rod assembly 4 fixed relative to the cylinder 1, as shown in Figure 3.

To adjust the extended length of the piston rod 42, when more extension is needed, repeat the extension steps. Note that when the first one-way sealing element 412 is in contact with the inner sidewall position between adjacent bypass grooves 11, the gas in the front chamber 5 and the rear chamber 6 does not flow between chambers.

When retraction is needed, apply more pressure to the piston rod 42 to compress the rear chamber 6, causing the piston assembly 41 to slide relative to the cylinder 1. When the contact area between the first one-way sealing element 412 and the inner sidewall of the cylinder 1 slides to the bypass grooves 11, the rear chamber 6 flows through the bypass grooves 11 to the front chamber 5. At this point, the piston rod assembly 4 can slide quickly and easily relative to the cylinder 1 until the first one-way sealing element 412 and the inner sidewall of the cylinder 1 contact the inner sidewall position between the adjacent bypass grooves 11 again, causing the piston rod assembly 4 to stop moving relative to the cylinder 1 and remain fixed again. Likewise, to stop the piston rod 42 at different stroke positions, repeat the above operation to make adjustments.

The above description is merely the preferred embodiment of this utility model. Therefore, any equivalent changes or modifications made according to the structural, characteristic, and principle described in the claims of this utility model are included in the scope of this utility model.

Claims – A damping compression gas spring that can stop doors and windows, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacture

A damping compression gas spring that can stop doors and windows, comprising a cylinder (1), a rear end block (2), a guiding assembly (3), and a piston rod assembly (4). The guiding assembly (3) is fixedly sealed at the front end of the cylinder (1), and the rear end block (2) is fixedly sealed at the rear end of the cylinder (1). Several sections of bypass grooves (11) are arranged on the inner sidewall of the cylinder (1), set at intervals along the axial direction of the cylinder (1). The piston rod assembly (4) includes a piston assembly (41) that slidably and sealingly fits with the inner sidewall of the cylinder (1) as well as a piston rod (42). The piston assembly (41) divides the cylinder (1) into a front chamber (5) and a rear chamber (6). The piston assembly (41) includes a piston body (411), fixed at the rear end of the piston rod (42). The front end of the piston rod (42) extends out of the cylinder (1) and slidably and sealingly fits with the guiding assembly (3). The feature is that the piston body (411) has a flow channel (4111) to communicate the front chamber (5) and the rear chamber (6), and a first one-way sealing element (412) that can open or close the flow channel (4111). When the piston assembly (41) moves towards the front end of the cylinder (1), the first one-way sealing element (412) opens the flow channel (4111). When the piston assembly (41) moves towards the rear end of the cylinder (1), the first one-way sealing element (412) closes the flow channel (4111). The length of each bypass groove (11) in the axial direction of the cylinder (1) is greater than the length of the contact part between the first one-way sealing element (412) and the inner wall of the cylinder (1).
The damping compression gas spring as described in claim 1, wherein the side wall of the cylinder (1) protrudes outward to form the bypass grooves (11).
The damping compression gas spring as described in claim 1, wherein the piston assembly (41) also includes piston pads (413) press-fitted each at one end of the piston body (411). Both piston pads (413) are fitted with through holes (4131) corresponding to the flow channel (4111), and a sealing friction ring (414) that opens and closes the holes (4131). When the piston assembly (41) moves towards the front end of the cylinder (1), the sealing friction ring (414) opens the holes (4131). When the piston assembly (41) moves towards the rear end of the cylinder (1), the sealing friction ring (414) closes the holes (4131).
The damping compression gas spring as described in claim 3, wherein both ends of the piston body (411) are provided with annular steps (4112) consisting of a step surface and a cylindrical surface. The flow channel (4111) passes through the step surface, and the sealing friction ring (414) fits slidably with the front cylindrical surface while the first one-way sealing element (412) fits slidably with the rear cylindrical surface.
The damping compression gas spring as described in claim 4, wherein the first one-way sealing element (412) uses a Y-shaped sealing ring with lips facing the rear end of the cylinder (1). The sealing element fits tightly with the cylindrical surface, forming a cone surface.
The damping compression gas spring as described in claim 1, wherein the guiding assembly (3) includes a front guide sleeve (31) fixed at the front end of the cylinder (1) and a second one-way sealing element (32).
The damping compression gas spring as described in claim 6, wherein the second one-way sealing element (32) uses a Y-shaped sealing ring with lips facing the rear end of the cylinder (1).
The damping compression gas spring as described in claim 1, wherein the outer end of the rear end block (2) is fixed with a rear connector (7), and the front end of the piston rod (42) is fixed with a front connector (8).
The damping compression gas spring as described in claim 8, wherein an O-ring (9) is provided at the junction of the rear end block (2) and the cylinder (1).

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Tags: compression gas spring, damping gas spring, gas spring patent

Posted by: harry | on January 15, 2025

A Refill Constant Force Controlled Oil-Gas Separation Gas Spring Power Device

Patent No.:CN110397693A Date:2019-07-10

Google Patent: https://patents.google.com/patent/CN110397693A/en?oq=CN110397693A

China Patent: http://epub.cnipa.gov.cn/

Abstract

The invention discloses a refill constant force controlled oil-gas separation gas spring power device, including a gas spring, microcontroller, gas source, integrated gas route block, and power supply; the gas spring includes a main cylinder, isolation piston, power piston, guiding seal assembly, docking seal, and piston rod. The main cylinder, isolation piston, and guiding seal assembly form an oil chamber. The power piston is equipped with a damping channel. The main cylinder, isolation piston, and docking seal form a gas chamber, and the docking seal is equipped with an interface connecting to the gas chamber. The integrated gas route block is equipped with an air inlet, air outlet, and exhaust port, along with an internal air channel. The gas source is connected to the air inlet via an electronic control valve, the air outlet is connected to the interface, and the exhaust port is connected to an electronic control valve for venting. The integrated gas route block is also equipped with a pressure sensor to detect the pressure within the air channel. The invention offers advantages such as rapid movement speed, stable motion, and refill control.

Description

A Refillable Constant Force Controlled Oil-Gas Separation Gas Spring Power Device

Technical Field The present invention relates to the technical field of gas springs, particularly to a refillable constant force controlled oil-gas separation gas spring power device.

Background Technology A gas spring is an industrial part that can perform functions such as support, cushioning, braking, height adjustment, and angle adjustment. It mainly consists of a pressure cylinder, piston rod, piston, sealing guide sleeve, and filler. The filler mainly uses inert gas or liquid damping oil, filling the closed pressure cylinder with the filler to make the cavity pressure several or tens of times higher than atmospheric pressure. This pressure difference, generated because the cross-sectional area of the piston rod is smaller than that of the piston, allows for the slow movement of the piston rod. Gas springs are widely used across various industries, functioning as compression damping rods, support damping rods, or as independent controllable power devices. For example, in national defense, firefighting, emergency, and chemical weapon engineering facilities, gas springs are used for doors, windows, covers, and emergency evacuation passages. In emergencies, the gas spring needs to extend and retract quickly and smoothly to open or close the connected doors, windows, or evacuation passages swiftly. Existing gas springs can only open or close these elements slowly, wasting time and potentially missing the best rescue or escape opportunities, endangering lives. The current technology primarily uses disposable energy-storing compression gas springs. Over long-term use and the influence of external environmental temperatures, the internal pressure significantly fluctuates and decreases, causing unstable motion that severely impacts performance. This problem necessitates frequent maintenance or replacement of gas springs, increasing unnecessary costs. Additionally, the current gas springs do not offer real-time control capabilities. Although gas cylinder power devices and hydraulic power devices are available on the market as power sources, the entire system is bulky and does not meet the requirement of normal operation in emergency power cut-off situations.

Technical Content This invention aims to provide a refillable constant force controlled oil-gas separation gas spring power device to solve the issues of slow motion, unstable motion, and lack of refill control in existing gas springs.

The technical solution adopted to solve the technical problem of the present invention includes a gas spring, microcontroller, gas source, integrated gas route block, and power supply. The gas spring includes a main cylinder, isolation piston, power piston, guiding seal assembly, docking seal, and piston rod. The guiding seal assembly is fixed at one end of the main cylinder, and the docking seal is fixed at the other end. The power piston, piston rod, and isolation piston are movable within the main cylinder. One end of the piston rod is fixedly connected to the power piston, while the other end passes through the guiding seal assembly and extends outside the main cylinder. The isolation piston is set between the power piston and the docking seal. An oil chamber is formed between the main cylinder, isolation piston, and guiding seal assembly. The power piston is equipped with a damping channel that penetrates both ends of the power piston. A gas chamber is formed between the main cylinder, isolation piston, and docking seal. The docking seal is equipped with an interface communicating with the gas chamber. The integrated gas route block features an air inlet, air outlet, and exhaust port, with airflow channels connecting these ports. The gas source connects to the air inlet through an electronic control valve, the air outlet is connected to the interface, and the exhaust port is connected to an electronic control valve for venting. Additionally, the integrated gas route block includes a pressure sensor for detecting the pressure within the airflow channel. The power supply, electronic control valves, and pressure sensor are all electrically connected to the microcontroller.

Moreover, both ends of the isolation piston are equipped with first Y-shaped sealing elements, and the middle of the isolation piston is fitted with a second O-ring to improve sealing. Furthermore, the power piston is slidably arranged within the oil chamber. It is fitted with a guiding support ring and a first O-ring to enhance sealing and ensure the gas spring’s concentricity and coaxiality during extension and compression movements.

The guiding sealing assembly comprises a connecting cylinder fixed to one end of the main cylinder, a guide sleeve fitted over the piston rod, and an end cover sealed onto the piston rod to seal the main cylinder. The guiding sealing assembly also includes multiple second Y-shaped sealing elements fitted over the piston rod to enhance sealing.

The microcontroller includes a microcontroller unit, power supply module for the pressure sensor, signal transmission module for the pressure sensor, power supply module for the intake electronic control valve, and the exhaust electronic control valve power supply module. The power supply module, signal transmission module, intake electronic control valve power supply module, exhaust electronic control valve power supply module, and power supply are all electrically connected to the microcontroller unit.

Additionally, the microcontroller includes a central control signal transmission module, which is electrically connected to the microcontroller unit. It is also electrically connected to the terminal of the remote control room to facilitate control and management. The microcontroller includes a limit setting module connected to the microcontroller unit to improve detection accuracy. The microcontroller also includes a switch button module that is electrically connected to the microcontroller unit for easy control operations.

Furthermore, an intake manual control valve is connected between the intake port and the gas source. This valve operates in parallel with the intake electronic control valve for manual operation, enhancing safety. The exhaust port is connected to an exhaust manual control valve, operating in parallel with the exhaust electronic control valve for manual operation, enhancing safety.

The beneficial effects of this invention are as follows:

When the air pressure in the airflow channel falls below the pressure value set by the upper and lower limit modules, the pressure sensor transmits data to the microcontroller. After processing by the microcontroller, it sends an electrical signal to the relevant electronic control valve, opening the intake electronic control valve while keeping the exhaust electronic control valve closed, supplementing the gas spring with air from the gas source. When the air pressure in the airflow channel exceeds the set pressure value, the pressure sensor feeds back data to the microcontroller, which processes it and sends an electrical signal to the relevant electronic control valve, closing the intake electronic control valve and opening the exhaust electronic control valve. Once the internal gas pressure of the gas spring decreases to the set value, the exhaust electronic control valve closes, maintaining the gas spring in a pressure-holding state. Similarly, when the air pressure in the airflow channel is within the set range, both the intake and exhaust electronic control valves remain closed, ensuring smooth motion of the gas spring and providing real-time refilling control.
When the central control transmission module receives an open signal, it feeds it back to the microcontroller, which sends an electrical signal to the relevant electronic control valve, keeping the intake electronic control valve closed and opening the exhaust electronic control valve. Consequently, the internal gas pressure of the gas spring gradually releases, reducing the power piston’s resistance and allowing the gas spring to retract slowly and stably. Conversely, when the central control transmission module receives a close signal, the intake electronic control valve opens, while the exhaust electronic control valve remains closed, rapidly increasing the internal gas pressure of the gas spring, exerting more pressure on the power piston, accelerating the extension speed of the gas spring, which provides the advantages of fast and stable motion.
The gas spring is fitted with an isolation piston, creating separate gas and oil chambers within the gas spring. High-pressure gas in the gas chamber serves as the power source for the gas spring’s extension and retraction, while the hydraulic oil in the oil chamber acts as the damping medium during these movements. The isolation piston transmits power, improving the stability of the power piston’s motion. Overall, the invention offers the advantages of fast motion speed, stable movement, and real-time refilling control.

Illustration Description: Figure 1 is a schematic diagram of the overall structure of the invention. Figure 2 is a logic schematic diagram of the microcontroller used in the invention. Figure 3 is a logic schematic diagram of the integrated gas route block used in the invention. Figure 4 is a structural schematic diagram of the gas spring used in the invention. Figure 5 is a structural schematic diagram of the isolation piston used in the invention. Figure 6 is a structural schematic diagram of the piston assembly used in the invention. Figure 7 is a structural schematic diagram of the guiding seal assembly used in the invention.

The figures represent the following components: 1 – Gas spring 11 – Main cylinder 12 – Isolation piston 121 – First Y-shaped sealing element 122 – Second O-ring 13 – Power piston 131 – Damping channel 132 – Guiding support ring 133 – First O-ring 14 – Guiding seal assembly 141 – Connecting cylinder 142 – Guide sleeve 143 – End cover 144 – Second Y-shaped sealing element 15 – Docking seal 151 – Regulator interface 152 – Rear sealing cylinder 153 – Connecting ear 16 – Piston rod 17 – Oil chamber 18 – Gas chamber 2 – Microcontroller 21 – Central control signal transmission module 211 – Remote control room terminal 22 – Microcontroller unit 23 – Limit setting module 24 – Pressure sensor power supply module 25 – Pressure sensor signal transmission module 26 – Intake electronic control valve power supply module 27 – Exhaust electronic control valve power supply module 28 – Switch button module 3 – Gas source 4 – Integrated gas route block 41 – Air inlet 411 – Intake electronic control valve 412 – Intake manual control valve 42 – Air outlet 43 – Exhaust port 431 – Exhaust electronic control valve 432 – Exhaust manual control valve 44 – Pressure sensor

Specific Implementation: To understand the technical aspects of the invention more intuitively and comprehensively, the following non-limiting feature descriptions are provided in conjunction with the attached figures:

As shown in Figures 1 to 7, a refillable constant force controlled oil-gas separation gas spring power device includes a gas spring 1, microcontroller 2, gas source 3, integrated gas route block 4, and power supply 5. The gas spring 1 includes a main cylinder 11, isolation piston 12, power piston 13, guiding seal assembly 14, docking seal 15, and piston rod 16. The guiding seal assembly 14 is fixed at one end of the main cylinder 11, while the docking seal 15 is fixed at the other end. The power piston 13, piston rod 16, and isolation piston 12 are movably arranged within the main cylinder 11. One end of the piston rod 16 is fixedly connected to the power piston 13, while the other end passes through the guiding seal assembly 14 and extends outside the main cylinder 11. The isolation piston 12 is set between the power piston 13 and the docking seal 15.

An oil chamber 17 is formed between the main cylinder 11, isolation piston 12, and guiding seal assembly 14. The power piston 13 is equipped with a damping channel 131 that penetrates both ends of the power piston 13. A gas chamber 18 is formed between the main cylinder 11, isolation piston 12, and docking seal 15. The docking seal 15 is equipped with a regulator interface 151 communicating with the gas chamber 18.

The integrated gas route block 4 features an air inlet 41, air outlet 42, and exhaust port 43, with airflow channels connecting these ports. The gas source 3 connects to the air inlet 41 through an intake electronic control valve 411, and the air outlet 42 is connected to the regulator interface 151. The exhaust port 43 is connected to an exhaust electronic control valve 431. Additionally, the integrated gas route block 4 includes a pressure sensor 44 for detecting the pressure within the airflow channel. The power supply 5, intake electronic control valve 411, exhaust electronic control valve 431, and pressure sensor 44 are all electrically connected to the microcontroller 2.

Preferably, two gas springs 1 form a set, respectively connecting to the left and right sides of a fire door. Inert gas nitrogen is introduced into the gas chamber 18, and the gas source 3 uses a cylinder storing high-pressure inert gas nitrogen, making the gas spring 1 safer and more reliable during use. Medium oil is introduced into the oil chamber 17, ensuring more stable movement of the power piston 13. The outer side of the docking seal 15 is threadedly connected to the rear sealing cylinder 152, which is threadedly connected to a connecting ear 153 fixed to the wall or door frame, extending the length of the gas spring 1 for a wider usage range and higher adaptability.

Both ends of the isolation piston 12 are equipped with first Y-shaped sealing elements 121, and a second O-ring 122 is fitted in the middle of the isolation piston 12, enhancing sealing and preventing medium exchange between the gas chamber 18 and the oil chamber 17, avoiding the phenomenon of seal gap inclusion.

Preferably, the power piston 13 is slidably arranged within the oil chamber 17, featuring a damping hole communicating with the damping channel 131 on the power piston 13. This damping hole acts as a one-way flow restriction, allowing the medium oil to flow slowly through the damping hole and providing buffering and shock absorption when the power piston 13 is compressed. When the power piston 13 extends, the medium oil flows quickly and steadily through the damping hole, enabling quick extension of the power piston 13. The power piston 13 is equipped with a guiding support ring 132, ensuring the concentricity and coaxiality of the gas spring 1 during extension and compression movements. The guiding support ring 132 has through holes communicating with the damping channel 131, allowing the medium oil to pass smoothly through the damping channel 131. The power piston 13 is fitted with a first O-ring 133 to enhance sealing, with both the power piston 13 and guiding support ring 132 fixed at the end of the piston rod 16 by spacers and nuts.

The guiding seal assembly 14 comprises a connecting cylinder 141 fixed at one end of the main cylinder 11, a guide sleeve 142 fitted over the piston rod 16, and an end cover 143 fitted over the piston rod 16 for sealing the main cylinder 1. The guiding seal assembly 14 also includes multiple second Y-shaped sealing elements 144, fitted over the piston rod 16. Preferably, a connecting member 161 is threadedly connected to the outer end of the piston rod 16, which is fixed to the fire door, facilitating the installation and use of the gas spring 1 and improving work efficiency. The connecting cylinder 141 is first threadedly connected to the main cylinder 11 and then welded at the interface. The end cover 143 is threadedly connected to the connecting cylinder 141, enhancing the overall sealing and strength of the gas spring 1.

The microcontroller 2 includes a microcontroller unit 22, power supply module for the pressure sensor 24, signal transmission module for the pressure sensor 25, power supply module for the intake electronic control valve 26, and power supply module for the exhaust electronic control valve 27. The power supply module for the pressure sensor 24, signal transmission module for the pressure sensor 25, power supply module for the intake electronic control valve 26, power supply module for the exhaust electronic control valve 27, and power supply 5 are all electrically connected to the corresponding signal ports of the microcontroller unit 22. The power supply module for the pressure sensor 24 and the signal transmission module for the pressure sensor 25 are both electrically connected to the pressure sensor 44. The power supply module for the intake electronic control valve 26 is electrically connected to the intake electronic control valve 411. The power supply module for the exhaust electronic control valve 27 is electrically connected to the exhaust electronic control valve 431. The power supply 5 uses a battery for power, providing convenience and safety.

The microcontroller 2 also includes a central control signal transmission module 21, which is electrically connected to the corresponding signal ports of the microcontroller unit 22. The central control signal transmission module 21 is also electrically connected to the terminal 211 of the remote control room, sending or receiving signals from the central control signal transmission module 21 to the terminal 211 of the remote control room, which is equipped with a display screen and operation buttons to display the pressure sensed by the pressure sensor 44 and the operating status of the intake electronic control valve 411, exhaust electronic control valve 431, microcontroller unit 22, and other electrical components, making operation and maintenance convenient.

The microcontroller 2 also includes an upper and lower limit setting module 23, electrically connected to the corresponding signal ports of the microcontroller unit 22. Preferably, the upper and lower limit setting module 23 adopts a button operation method, setting the upper and lower pressure values through buttons. The microcontroller unit 22 compares the pressure value sensed by the pressure sensor 44 in the airflow channel with the upper and lower limits, outputting corresponding electrical signals to each electronic component to control the opening or closing of each electronic control valve, making the regulation more precise.

The microcontroller 2 also includes a switch button module 28, electrically connected to the corresponding signal ports of the microcontroller unit 22. The switch button module 28 uses a button operation method, making it easy to turn the device on or off, simplifying operation.

An intake manual control valve 412 is also connected between the air inlet 41 and the gas source 3, and the intake manual control valve 412 operates in parallel with the intake electronic control valve 411. The exhaust port 43 is connected to an exhaust manual control valve 432, and the exhaust manual control valve 432 operates in parallel with the exhaust electronic control valve 431. In case of a failure in the intake electronic control valve 411 or the intake electronic control valve 411, the intake manual control valve 412 or the exhaust manual control valve 432 can be manually operated for emergency control, enhancing safety.

The specific working principle of the invention is as follows: When the air pressure in the airflow channel, specifically within the gas chamber 18 of the gas spring 1, decreases, the pressure sensor 44 detects the pressure change and transmits the data to the pressure sensor signal transmission module 25. The microcontroller unit 22 processes this information. If the pressure value is below the lower limit set by the limit setting module 23, the microcontroller unit 22 sends an electrical signal to the intake electronic control valve power supply module 26, causing the intake electronic control valve 411 to open. At this time, the exhaust electronic control valve 431 remains closed as it has not received an electrical signal. The gas source 3 supplies gas to the gas spring 1 through the airflow channel within the integrated gas route block 4. Conversely, if the pressure value exceeds the upper limit set by the limit setting module 23, the microcontroller unit 22 sends an electrical signal to the exhaust electronic control valve power supply module 27, causing the exhaust electronic control valve 431 to open. In this state, the intake electronic control valve 411 remains closed, and the gas in the gas chamber 18 of the gas spring 1 is released through the airflow channel via the exhaust electronic control valve 431. Once the internal pressure of the gas spring 1 decreases to the range set by the limit setting module 23, the exhaust electronic control valve 431 closes, maintaining the gas spring 1 in a pressure-holding state. Similarly, when the pressure value remains within the range set by the limit setting module 23, both the intake electronic control valve 411 and exhaust electronic control valve 431 stay closed, keeping the internal pressure of the gas spring 1 stable, thus achieving real-time gas regulation.

In emergencies or when manual operation of the gas spring 1 is required for quick extension or retraction, a signal is sent from the remote control room terminal 211 to the central control signal transmission module 21. When the central control signal transmission module 21 receives an extension signal, it feeds back to the microcontroller unit 22, which then sends an electrical signal to the intake electronic control valve power supply module 26, opening the intake electronic control valve 411. High-pressure nitrogen from the gas cylinder flows into the gas chambers 18 of the two gas springs 1 via the airflow channel within the integrated gas route block 4 and the regulator interface 151, increasing the gas pressure in the gas chambers 18. The isolation piston 12 is then pressurized, which in turn pressurizes the oil chamber 17. The medium oil within the oil chamber 17 flows faster through the damping channel 131, accelerating the movement of the power piston 13 and the extension speed of the piston rod 16. At this time, the exhaust electronic control valve 431 remains closed, causing both gas springs 1 to extend simultaneously, thereby quickly opening the fire door.

Conversely, when the central control signal transmission module 21 receives a retraction signal, it feeds back to the microcontroller unit 22. The microcontroller unit 22 sends an electrical signal to the exhaust electronic control valve power supply module 27, opening the exhaust electronic control valve 431. The gas within the two gas springs 1 is expelled through the airflow channel and then through the exhaust electronic control valve 431, reducing the pressure in the gas chambers 18. Once the internal pressure falls below the lower limit set by the limit setting module 23, the exhaust electronic control valve 431 closes. When people push the fire door, the medium oil within the oil chamber 17 slowly flows through the damping channel 131, allowing the power piston 13 to move smoothly, and the piston rod 16 to retract steadily. Meanwhile, the intake electronic control valve 411 remains closed, ensuring the fire door closes smoothly and reliably.

The above descriptions are merely the preferred embodiments of the invention. Hence, any equivalent changes or modifications based on the structure, characteristics, and principles described in the patent claims of the present invention are included within the scope of the patent claims.

Claims (10) – A Refill Constant Force Controlled Oil-Gas Separation Gas Spring Power Device, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacture

A refillable constant force controlled oil-gas separation gas spring power device, characterized in that it includes a gas spring (1), microcontroller (2), gas source (3), integrated gas route block (4), and power supply (5). The gas spring (1) includes a main cylinder (11), isolation piston (12), power piston (13), guiding seal assembly (14), docking seal (15), and piston rod (16). The guiding seal assembly (14) is fixed at one end of the main cylinder (11), and the docking seal (15) is fixed at the other end. The power piston (13), piston rod (16), and isolation piston (12) are movably arranged within the main cylinder (11). One end of the piston rod (16) is fixedly connected to the power piston (13), while the other end passes through the guiding seal assembly (14) and extends outside the main cylinder (11). The isolation piston (12) is set between the power piston (13) and the docking seal (15). An oil chamber (17) is formed between the main cylinder (11), isolation piston (12), and guiding seal assembly (14). The power piston (13) is equipped with a damping channel (131) that penetrates both ends of the power piston (13). A gas chamber (18) is formed between the main cylinder (11), isolation piston (12), and docking seal (15). The docking seal (15) is equipped with a regulator interface (151) communicating with the gas chamber (18). The integrated gas route block (4) features an air inlet (41), air outlet (42), and exhaust port (43), with airflow channels connecting these ports. The gas source (3) connects to the air inlet (41) through an intake electronic control valve (411), the air outlet (42) is connected to the regulator interface (151), and the exhaust port (43) is connected to an exhaust electronic control valve (431). Additionally, the integrated gas route block (4) includes a pressure sensor (44) for detecting the pressure within the airflow channel. The power supply (5), intake electronic control valve (411), exhaust electronic control valve (431), and pressure sensor (44) are all electrically connected to the microcontroller (2).
The refillable constant force controlled oil-gas separation gas spring power device according to claim 1, characterized in that both ends of the isolation piston (12) are equipped with first Y-shaped sealing elements (121), and the middle of the isolation piston (12) is fitted with a second O-ring (122).
The refillable constant force controlled oil-gas separation gas spring power device according to claim 1, characterized in that the power piston (13) is slidably arranged within the oil chamber (17). The power piston (13) is equipped with a guiding support ring (132) and a first O-ring (133).
The refillable constant force controlled oil-gas separation gas spring power device according to claim 1, characterized in that the guiding seal assembly (14) comprises a connecting cylinder (141) fixed at one end of the main cylinder (11), a guide sleeve (142) fitted over the piston rod (16), and an end cover (143) fitted over the piston rod (16) for sealing the main cylinder (11). The guiding seal assembly (14) also includes multiple second Y-shaped sealing elements (144).
The refillable constant force controlled oil-gas separation gas spring power device according to claim 1, characterized in that the microcontroller (2) includes a microcontroller unit (22), power supply module for the pressure sensor (24), signal transmission module for the pressure sensor (25), power supply module for the intake electronic control valve (26), and power supply module for the exhaust electronic control valve (27). The power supply module for the pressure sensor (24), signal transmission module for the pressure sensor (25), power supply module for the intake electronic control valve (26), power supply module for the exhaust electronic control valve (27), and power supply (5) are all electrically connected to the microcontroller unit (22).
The refillable constant force controlled oil-gas separation gas spring power device according to claim 5, characterized in that the microcontroller (2) also includes a central control signal transmission module (21), which is electrically connected to the microcontroller unit (22) and the remote control room terminal (211).
The refillable constant force controlled oil-gas separation gas spring power device according to claim 5, characterized in that the microcontroller (2) also includes an upper and lower limit setting module (23), which is electrically connected to the microcontroller unit (22).
The refillable constant force controlled oil-gas separation gas spring power device according to claim 5, characterized in that the microcontroller (2) also includes a switch button module (28), which is electrically connected to the microcontroller unit (22).
The refillable constant force controlled oil-gas separation gas spring power device according to claim 1, characterized in that an intake manual control valve (412) is also connected between the air inlet (41) and the gas source (3). The intake manual control valve (412) operates in parallel with the intake electronic control valve (411).
The refillable constant force controlled oil-gas separation gas spring power device according to claim 1, characterized in that the exhaust port (43) is also connected to an exhaust manual control valve (432). The exhaust manual control valve (432) operates in parallel with the exhaust electronic control valve (431).

Posted in Patents | No Comments »
Tags: leiyan gas spring patent, Refillable Oil-Gas Separation Gas Spring

Posted by: harry | on January 14, 2025

a secondary sealing guidance structure for gas springs

Patent No.:CN208778568U Date:2018-09-11

Google Patent: https://patents.google.com/patent/CN208778568U/en?oq=CN208778568U

China Patent: http://epub.cnipa.gov.cn/

Abstract

This utility model provides a secondary sealing guidance structure for gas springs, including a piston rod, first and second guiding sealing components, a piston, and a cylinder. This utility model adds a second guiding sealing component between the piston rod and the cylinder. A movable second sealing ring is assembled in a stepped groove of this second guiding sealing component. When the gas is inflated into the gas spring through the inflation port, it passes through the first and second guiding sealing components, pushing the second sealing ring out of the stepped groove to ensure a clear inflation passage. Upon completion of inflation, under the pressure of the piston, the second sealing ring retracts into the stepped groove, blocking the inflation passage to prevent gas leakage, thus forming a secondary seal. This utility model not only ensures convenient inflation but also prevents gas leakage, offering good sealing performance and helping to extend the service life of the gas spring.

Description

Field of Technology This utility model relates to the field of gas spring technology, specifically to a secondary sealing guidance structure for gas springs.

Background Technology Gas springs need to be filled with inert gas during use. In existing technology, some gas springs have a sealing guidance component connected to the front end, inflating via the piston rod end. However, this structure, which uses only one sealing guidance component, does not have good airtightness, causing internal gas to leak easily. Additionally, to prevent gas leakage, two sets of sealing guidance components are arranged in parallel at the front end of the gas spring, improving the sealing but significantly increasing the difficulty of inflation. There are also structures with inflation ports at the rear end of the gas spring, which are not easy to seal, often resulting in defective products and low work efficiency.

Utility Model Content One objective of this utility model is to propose a secondary sealing guidance structure for gas springs that is easy to inflate, has good sealing performance, and helps to extend the service life of the gas spring.

This utility model provides a secondary sealing guidance structure for gas springs, including a piston rod, first and second guiding sealing components, a piston, and a cylinder. The first and second guiding sealing components are sequentially connected from outside to inside at the front end opening of the cylinder. The piston is slidably connected within the cylinder, with the piston’s diameter equal to the cylinder’s inner diameter. One end of the piston rod is connected to the center of the piston, while the other end passes through the first and second guiding sealing components and extends out of the cylinder. There is a gap between the piston rod and both the first and second guiding sealing components, forming an inflation port. A lip seal ring is set close to the side of the first guiding sealing component near to the second guiding sealing component, which fits onto the piston rod, allowing gas to enter while preventing gas from escaping. A stepped groove is set on the end face of the second guiding sealing component away from the first guiding sealing component, with a second sealing ring assembled between the stepped groove and the piston rod. This second sealing ring can move in and out of the stepped groove.

In this utility model, a second guiding sealing component is added between the piston rod and the cylinder, with a movable second sealing ring assembled in the stepped groove of this second guiding sealing component. When inflating the gas spring through the inflation port, gas passes through the first and second guiding sealing components, pushing the second sealing ring out of the stepped groove to ensure a clear inflation passage. Upon completion of inflation, under the piston’s pressure, the second sealing ring retracts into the stepped groove, blocking the inflation passage and preventing gas leakage, thereby forming a secondary seal of the piston rod. This utility model ensures convenient inflation while preventing gas leakage, offering good sealing performance, and helping to extend the gas spring’s service life.

Further Description

Additionally, a first sealing ring is arranged between the second guiding sealing component and the inner surface of the cylinder.
Additionally, the first sealing ring is fitted in the first groove on the outer sidewall of the second guiding sealing component.
Additionally, the outer sidewall of the second guiding sealing component also has a second groove, and a protrusion corresponding to the second groove is arranged on the cylinder, with the protrusion engaged in the second groove.
Additionally, a snap protrusion is arranged at the opening of the front end of the cylinder, and a snap groove is arranged on the first guiding sealing component corresponding to the position of the snap protrusion, with the snap protrusion engaged in the snap groove.
Additionally, the rear end of the cylinder is connected to a rear plug.
Additionally, the rear plug, cylinder, and second guiding sealing component form a sealed inner cavity of the gas spring, which is filled with inert gas.

The additional aspects and advantages of this utility model will be partially given in the following description, partially be apparent from the following description, or learned through practice of the utility model.

Brief Description of Drawings

Figure 1 is a schematic diagram of the secondary sealing guidance structure for gas springs in normal use state, according to an embodiment of the utility model.
Figure 2 is a schematic diagram of the secondary sealing guidance structure for gas springs in a high-pressure inflation state, according to an embodiment of the utility model.
Figure 3 is a schematic diagram of the gas spring with a secondary sealing guidance structure, according to an embodiment of the utility model.

In the drawings:

Piston rod
First guiding sealing component
Lip seal ring
Snap groove
Second guiding sealing component
Sleeve ring
First sealing ring
Second sealing ring
Stepped groove
First groove
Second groove
Piston
Piston seal ring
Cylinder
Protrusion
Snap protrusion
Inert gas
Rear plug

Detailed Description

The embodiments of this utility model are described in detail below, wherein the examples of these embodiments are shown in the accompanying drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The embodiments described below by reference to the figures are exemplary and are intended to explain the utility model and should not be construed as limiting the utility model.

This utility model embodiment provides a secondary sealing guidance structure for gas springs, as shown in Figures 1 and 2, including: a piston rod (1), a first guiding sealing component (2), a second guiding sealing component (3), a piston (4), and a cylinder (5). The first guiding sealing component (2) and the second guiding sealing component (3) are sequentially connected from outside to inside at the front end opening of the cylinder (5). The piston (4) is slidably connected within the cylinder (5), with the piston (4) having a diameter equal to the inner diameter of the cylinder (5). One end of the piston rod (1) is connected to the center of the piston (4), while the other end passes through the first guiding sealing component (2) and the second guiding sealing component (3) and extends out of the cylinder (5). There are gaps between the piston rod (1) and both the first guiding sealing component (2) and the second guiding sealing component (3), forming an inflation port (8). The first guiding sealing component (2) has a lip seal ring (21) near the side of the second guiding sealing component (3), which fits onto the piston rod (1), allowing gas to enter while preventing gas from escaping. The second guiding sealing component (3) has a stepped groove (34) on the end face away from the first guiding sealing component (2), with a second sealing ring (33) fitted between the stepped groove (34) and the piston rod (1). The second sealing ring (33) can move in and out of the stepped groove (34).

This utility model adds a second guiding sealing component between the piston rod and the cylinder, with a movable second sealing ring assembled in the stepped groove of this second guiding sealing component. When inflating the gas spring through the inflation port, gas passes through the first and second guiding sealing components, pushing the second sealing ring out of the stepped groove to ensure a clear inflation passage. Upon completion of inflation, under the pressure of the piston, the second sealing ring is pushed back into the stepped groove, blocking the inflation passage and preventing gas leakage, thus forming a secondary seal for the piston rod. This utility model ensures convenient inflation while preventing gas leakage, offering good sealing performance, and helping to extend the gas spring’s service life.

In one aspect of this utility model embodiment, a first sealing ring (32) is arranged between the second guiding sealing component (3) and the inner surface of the cylinder (5) and is fitted in the first groove (35) on the outer sidewall of the second guiding sealing component (3). The main body of the second guiding sealing component is an annular sleeve (31), which fits onto the piston rod (1). Preferably, the outer sidewall of the second guiding sealing component (3) also has a second groove (36), and a protrusion (51) corresponding to the second groove (36) is arranged on the cylinder (5), with the protrusion (51) engaged in the second groove (36). This design ensures the airtightness between the second guiding sealing component and the cylinder while also providing a stable connection of the second guiding sealing component on the cylinder.

In one aspect of this utility model embodiment, a snap protrusion (52) is arranged at the opening of the front end of the cylinder (5), and a snap groove (22) corresponding to the position of the snap protrusion (52) is arranged on the first guiding sealing component (2), with the snap protrusion (52) engaged in the snap groove (22). The assembly of the snap protrusion and the snap groove ensures the stable connection of the first guiding sealing component at the front end opening of the cylinder.

In one aspect of this utility model embodiment, as shown in Figure 3, the rear end of the cylinder (5) is connected to a rear plug (7), forming a sealed inner cavity of the gas spring with the cylinder (5) and the second guiding sealing component (3), which is filled with inert gas (6). The rear plug, cylinder, first guiding sealing component, and second guiding sealing component together form an inner cavity holding inert gas, providing the environment for the utility model to function.

Although the embodiments of the utility model have been shown and described above, it will be understood that the above embodiments are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, replacements, and variations within the scope of the utility model.

Claims: a secondary sealing guidance structure for gas springs, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacture

A secondary sealing guidance structure for gas springs characterized by including:
- a piston rod, a first guiding sealing component, a second guiding sealing component, a piston, and a cylinder;
- where the first and second guiding sealing components are sequentially connected from outside to inside at the front end opening of the cylinder, the piston is slidably connected within the cylinder, one end of the piston rod is connected to the piston, the other end passes through the first and second guiding sealing components and extends out of the cylinder, and there are gaps between the piston rod and both the first and second guiding sealing components, forming an inflation port;
- the first guiding sealing component has a lip seal ring on the side near the second guiding sealing component, which fits onto the piston rod;
- the second guiding sealing component has a stepped groove on the side away from the first guiding sealing component, with a second sealing ring between the stepped groove and the piston rod, the second sealing ring can move in and out of the stepped groove.
The secondary sealing guidance structure for gas springs as described in claim 1, characterized by further including a first sealing ring between the second guiding sealing component and the inner surface of the cylinder.
The secondary sealing guidance structure for gas springs as described in claim 2, characterized by the first sealing ring being fitted in the first groove on the outer sidewall of the second guiding sealing component.
The secondary sealing guidance structure for gas springs as described in claim 3, characterized by the second guiding sealing component’s outer sidewall also having a second groove, with a corresponding protrusion on the cylinder positioned to engage in the second groove.
The secondary sealing guidance structure for gas springs as described in claim 1, characterized by the front end opening of the cylinder having a snap protrusion, with a corresponding snap groove on the first guiding sealing component, with the snap protrusion engaged in the snap groove.
The secondary sealing guidance structure for gas springs as described in claims 1-5, characterized by the rear end of the cylinder being connected to a rear plug.
The secondary sealing guidance structure for gas springs as described in claim 6, characterized by the rear plug, cylinder, and second guiding sealing component forming a sealed inner cavity of the gas spring, which is filled with inert gas.

Posted in Patents | No Comments »
Tags: compression gas spring, leiyan gas spring patent

Posted by: harry | on January 13, 2025

Synchronous Linkage Gas Spring

Patent No.:CN208778559U Date:2018-09-11

Google Patent: https://patents.google.com/patent/CN208778559U/en?oq=CN208778559U

China Patent: http://epub.cnipa.gov.cn/

Abstract

This utility model provides a form of synchronous linkage gas spring, which includes: a first gas spring and a second gas spring. The first gas spring includes a first piston rod, a first guiding seal, a first piston, and a first cylinder. The first piston divides the first cylinder’s inner cavity into a first front chamber at the front side of the first piston and a first rear chamber at the rear side of the first piston. The second gas spring includes a second piston rod, a second guiding seal, a second piston, and a second cylinder. The second piston divides the second cylinder’s inner cavity into a second front chamber at the front side of the second piston and a second rear chamber at the rear side of the second piston.

This utility model utilizes a first connecting pipe to connect the first gas spring’s first front chamber with the second gas spring’s second rear chamber, and a second connecting pipe to connect the second gas spring’s second front chamber with the first gas spring’s first rear chamber, achieving the functionality of synchronous expansion and contraction of the first piston rod and the second piston rod.

Description

Synchronous Linkage Gas Spring

Technical Field

This utility model relates to the field of gas spring technology, and more specifically to a synchronous linkage gas spring.

Background Technology

When two gas springs are used together, it is necessary for the piston rods of the two gas springs to have a synchronous in-and-out function. In the existing technology, some use controllers to control the travel of the two gas springs in real-time to achieve the synchronous in-and-out function. However, this control is relatively complex, and sometimes the synchronization is not good.

Utility Model Content

An objective of this utility model is to propose a gas spring capable of achieving synchronous linkage extension and contraction of the piston rods of two gas springs.

This utility model provides a synchronous linkage gas spring, which includes: a first gas spring and a second gas spring. The first gas spring includes a first piston rod, a first guiding seal, a first piston, and a first cylinder. The first guiding seal is connected to the front-end opening of the first cylinder. The first piston is movably connected in the first cylinder, dividing the inner cavity of the first cylinder into a first front chamber at the front side of the first piston and a first rear chamber at the rear side of the first piston. One end of the first piston rod is connected to the first piston, and the other end extends out of the first cylinder through the first guiding seal. The second gas spring includes a second piston rod, a second guiding seal, a second piston, and a second cylinder. The second guiding seal is connected to the front-end opening of the second cylinder. The second piston is movably connected in the second cylinder, dividing the inner cavity of the second cylinder into a second front chamber at the front side of the second piston and a second rear chamber at the rear side of the second piston. One end of the second piston rod is connected to the second piston, and the other end extends out of the second cylinder through the second guiding seal. The first front chamber is connected to the second rear chamber through a first connecting pipe, and the second front chamber is connected to the first rear chamber through a second connecting pipe.

This utility model uses the first connecting pipe to connect the first front chamber of the first gas spring with the second rear chamber of the second gas spring, and the second connecting pipe to connect the second front chamber of the second gas spring with the first rear chamber of the first gas spring, achieving the function of synchronous extension and contraction of the first and second piston rods. For example, when the first piston rod is compressed by external force, the first piston compresses inward, the first front chamber enlarges, and the first rear chamber shrinks. The pressure in the first front chamber decreases, and the pressure in the first rear chamber increases, so the first front chamber will draw gas from the second rear chamber through the first connecting pipe. The first rear chamber will push gas to the second front chamber through the second connecting pipe, causing the pressure in the second rear chamber to decrease and the pressure in the second front chamber to increase, creating an inward pressure difference on both sides of the second piston, causing the second piston to move inward and driving the second piston rod to produce a synchronous contraction action with the first piston rod. Since the gas-tightness between each device of this utility model is good, when the gas pressure inside the first and second gas springs reaches balance again, the movement amplitude of the first and second piston rods is the same.

Furthermore, the first guiding seal includes a first guiding bushing, a first lip seal ring, and a first vent isolator arranged from outside to inside in the front-end opening of the first cylinder. The first lip seal ring is sleeved on the first piston rod, and a first guiding seal connecting pipe interface is provided on the first vent isolator. The first connecting pipe is connected to the first front chamber through the first guiding seal connecting pipe interface. The second guiding seal includes a second guiding bushing, a second lip seal ring, and a second vent isolator arranged from outside to inside in the front-end opening of the second cylinder. The second lip seal ring is sleeved on the second piston rod, and a second guiding seal connecting pipe interface is provided on the second vent isolator. The second connecting pipe is connected to the second front chamber through the second guiding seal connecting pipe interface.

Furthermore, the rear end of the first cylinder is connected with a first rear stopper, which has a first rear stopper connecting pipe interface. The second connecting pipe is connected to the first rear chamber through the first rear stopper connecting pipe interface. The rear end of the second cylinder is connected with a second rear stopper, which has a second rear stopper connecting pipe interface. The first connecting pipe is connected to the second rear chamber through the second rear stopper connecting pipe interface.

Further Details

Furthermore, the first guiding seal connecting pipe interface is arranged opposite to the second rear stopper connecting pipe interface, and the second guiding seal connecting pipe interface is arranged opposite to the first rear stopper connecting pipe interface, splicing the first gas spring and the second gas spring together vertically.

Furthermore, the first gas spring and the second gas spring are connected back-to-back, with a spacer set between the first rear chamber and the second rear chamber.

Furthermore, the spacer is equipped with a first spacer interface connected to the first rear chamber and a second spacer interface connected to the second rear chamber. The first connecting pipe is connected to the second rear chamber through the second spacer interface, and the second connecting pipe is connected to the first rear chamber through the first spacer interface.

Furthermore, a sealing ring is provided at the position where the middle of the spacer fits with the cylinder wall.

Furthermore, a pair of sealing rings is set between the first guiding seal and the first cylinder on both sides of the first guiding seal connecting pipe interface, and a pair of sealing rings is set between the second guiding seal and the second cylinder on both sides of the second guiding seal connecting pipe interface.

Furthermore, a sealing ring is provided on the fitting surface between the first piston and the first cylinder, and a sealing ring is provided on the fitting surface between the second piston and the second cylinder.

Additional aspects and advantages of this utility model will be partially given in the following description, partially become evident from the following description, or understood through practice of this utility model.

Brief Description of the Drawings

Figure 1 is a structural schematic diagram of a synchronous linkage gas spring according to an embodiment of this utility model.

Figure 2 is a structural schematic diagram of another synchronous linkage gas spring according to an embodiment of this utility model.

In the drawings, the labels are as follows:

1: First gas spring
- 11: First piston rod
- 12: First guiding seal
  - 121: First guiding bushing
  - 122: First lip seal ring
  - 123: First vent isolator
  - 124: First guiding seal connecting pipe interface
- 13: First connecting pipe
- 14: First piston
- 15: First cylinder
- 16: First rear stopper
  - 161: First rear stopper connecting pipe interface
- 17: First front chamber
- 18: First rear chamber
2: Second gas spring
- 2: First guiding seal assembly
  - 21: Lip seal ring
  - 22: Second guiding seal
    - 221: Second guiding bushing
    - 222: Second lip seal ring
    - 223: Second vent isolator
    - 224: Second guiding seal connecting pipe interface
  - 22: Slot
- 23: Second connecting pipe
- 24: Second piston
- 25: Second cylinder
- 26: Second rear stopper
  - 261: Second rear stopper connecting pipe interface
- 27: Second front chamber
- 28: Second rear chamber
3: Spacer
- 31: First spacer interface
- 32: Second spacer interface

Detailed Description of Specific Embodiments

The embodiments of this utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain this utility model and should not be construed as limiting it.

The embodiments of this utility model provide a synchronous linkage gas spring, as shown in Figures 1 and 2, which includes: a first gas spring 1 and a second gas spring 2. The first gas spring 1 includes a first piston rod 11, a first guiding seal 12, a first piston 14, and a first cylinder 15. The first guiding seal 12 is connected to the front-end opening of the first cylinder 15. The first piston 14 is movably connected within the first cylinder 15, dividing the inner cavity of the first cylinder 15 into a first front chamber 17 on the front side of the first piston 14 and a first rear chamber 18 on the rear side of the first piston 14. One end of the first piston rod 11 is connected to the first piston 14, and the other end extends out of the first guiding seal 12 through the first cylinder 15. The second gas spring 2 includes a second piston rod 21, a second guiding seal 22, a second piston 24, and a second cylinder 25. The second guiding seal 22 is connected to the front-end opening of the second cylinder 25. The second piston 24 is movably connected within the second cylinder 25, dividing the inner cavity of the second cylinder 25 into a second front chamber 27 on the front side of the second piston 24 and a second rear chamber 28 on the rear side of the second piston 24. One end of the second piston rod 21 is connected to the second piston 24, and the other end extends out of the second guiding seal 22 through the second cylinder 25. The first front chamber 17 is connected to the second rear chamber 28 through a first connecting pipe 13, and the second front chamber 27 is connected to the first rear chamber 18 through a second connecting pipe 23.

Those skilled in the art should understand that the concepts of “front” and “rear” as used herein specifically refer to a single gas spring, with the side where the piston rod is located being the front side and the opposite side being the rear side. Preferably, a sealing ring is provided on the fitting surface between the first piston 14 and the first cylinder 15, and a sealing ring is provided on the fitting surface between the second piston 24 and the second cylinder 25. The sealing rings help ensure the airtightness between the front and rear chambers of the two gas springs, preventing gas leakage between them.

This utility model uses the first connecting pipe to connect the first front chamber of the first gas spring with the second rear chamber of the second gas spring, and the second connecting pipe to connect the second front chamber of the second gas spring with the first rear chamber of the first gas spring, achieving the function of synchronous extension and contraction of the first and second piston rods. For example, when the first piston rod is compressed by an external force, the first piston compresses inward, the first front chamber enlarges, and the first rear chamber shrinks. The pressure in the first front chamber decreases, and the pressure in the first rear chamber increases, so the first front chamber draws gas from the second rear chamber through the first connecting pipe. The first rear chamber pushes gas to the second front chamber through the second connecting pipe, causing the pressure in the second rear chamber to decrease and the pressure in the second front chamber to increase, creating an inward pressure difference on both sides of the second piston, causing the second piston to move inward and driving the second piston rod to produce a synchronous contraction action with the first piston rod. Since the airtightness between each device of this utility model is good, when the gas pressure inside the first and second gas springs reaches balance again, the movement amplitude of the first and second piston rods is the same.

In one aspect of this utility model embodiment, the first guiding seal 12 includes a first guiding bushing 121, a first lip seal ring 122, and a first vent isolator 123, arranged from the outside to the inside in the front-end opening of the first cylinder 15. The first lip seal ring 122 is sleeved on the first piston rod 11, and a first guiding seal connecting pipe interface 124 is provided on the first vent isolator 123. The first connecting pipe 13 is connected to the first front chamber 17 through the first guiding seal connecting pipe interface 124. The second guiding seal 22 includes a second guiding bushing 221, a second lip seal ring 222, and a second vent isolator 223, arranged from the outside to the inside in the front-end opening of the second cylinder 25. The second lip seal ring 222 is sleeved on the second piston rod 21, and a second guiding seal connecting pipe interface 224 is provided on the second vent isolator 223. The second connecting pipe 23 is connected to the second front chamber 27 through the second guiding seal connecting pipe interface 224. Preferably, a pair of sealing rings is set between the first guiding seal 12 and the first cylinder 15 on both sides of the first guiding seal connecting pipe interface 124, and a pair of sealing rings is set between the second guiding seal 22 and the second cylinder 25 on both sides of the second guiding seal connecting pipe interface 224. Providing connecting pipe connection positions on the vent isolators ensures airtightness while enhancing the overall airtightness of the device through the arrangement of sealing rings and lip seal rings.

In one aspect of this utility model embodiment, as shown in Figure 1, the rear end of the first cylinder 15 is connected with a first rear stopper 16, which has a first rear stopper connecting pipe interface 161. The second connecting pipe 23 is connected to the first rear chamber 18 through the first rear stopper connecting pipe interface 161. The rear end of the second cylinder 25 is connected with a second rear stopper 26, which has a second rear stopper connecting pipe interface 261. The first connecting pipe 13 is connected to the second rear chamber 28 through the second rear stopper connecting pipe interface 261. The first guiding seal connecting pipe interface 124 is arranged opposite to the second rear stopper connecting pipe interface 261, and the second guiding seal connecting pipe interface 224 is arranged opposite to the first rear stopper connecting pipe interface 161, splicing the first gas spring and the second gas spring together vertically. This design allows the cylinder parts of the first and second gas springs to overlap vertically. Given a fixed total length, this arrangement increases the stroke distance of the piston rod.

In one aspect of this utility model embodiment, as shown in Figure 2, the first gas spring 1 and the second gas spring 2 are connected back-to-back, with a spacer 3 set between the first rear chamber 18 and the second rear chamber 28. The spacer 3 is equipped with a first spacer interface 31 connected to the first rear chamber 18 and a second spacer interface 32 connected to the second rear chamber 28. The first connecting pipe 13 is connected to the second rear chamber 28 through the second spacer interface 32, and the second connecting pipe 23 is connected to the first rear chamber 18 through the first spacer interface 31. Preferably, a sealing ring is provided at the central position of the spacer 3 where it fits with the cylinder wall. Specifically, in this embodiment, the first cylinder 15 and the second cylinder 25 can be connected together, with the spacer set in the middle and the sealing ring provided at the contact surface where the spacer fits with the cylinder. This design allows the first and second gas springs to be joined back-to-back, minimizing the volume while keeping the total length fixed.

Although the above embodiments of this utility model have been shown and described, it should be understood that the embodiments are exemplary and not to be construed as limiting this utility model. Those skilled in the art can vary, modify, substitute, and alter the described embodiments within the scope of this utility model.

Claims (10) – Synchronous Linkage Gas Spring, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacture

A synchronous linkage gas spring, characterized by including:
- A first gas spring and a second gas spring;
- The first gas spring includes a first piston rod, a first guiding seal, a first piston, and a first cylinder;
- The first guiding seal is connected to the front-end opening of the first cylinder;
- The first piston is movably connected in the first cylinder, dividing the inner cavity of the first cylinder into a first front chamber on the front side of the first piston and a first rear chamber on the rear side of the first piston;
- One end of the first piston rod is connected to the first piston, and the other end extends out of the first cylinder through the first guiding seal;
- The second gas spring includes a second piston rod, a second guiding seal, a second piston, and a second cylinder;
- The second guiding seal is connected to the front-end opening of the second cylinder;
- The second piston is movably connected in the second cylinder, dividing the inner cavity of the second cylinder into a second front chamber on the front side of the second piston and a second rear chamber on the rear side of the second piston;
- One end of the second piston rod is connected to the second piston, and the other end extends out of the second cylinder through the second guiding seal;
- The first front chamber is connected to the second rear chamber through a first connecting pipe, and the second front chamber is connected to the first rear chamber through a second connecting pipe.
The synchronous linkage gas spring according to claim 1, characterized in that:
- The first guiding seal includes a first guiding bushing, a first lip seal ring, and a first vent isolator arranged from the outside to the inside in the front-end opening of the first cylinder;
- The first lip seal ring is sleeved on the first piston rod, and a first guiding seal connecting pipe interface is provided on the first vent isolator;
- The first connecting pipe is connected to the first front chamber through the first guiding seal connecting pipe interface;
- The second guiding seal includes a second guiding bushing, a second lip seal ring, and a second vent isolator arranged from the outside to the inside in the front-end opening of the second cylinder;
- The second lip seal ring is sleeved on the second piston rod, and a second guiding seal connecting pipe interface is provided on the second vent isolator;
- The second connecting pipe is connected to the second front chamber through the second guiding seal connecting pipe interface.
The synchronous linkage gas spring according to claim 2, characterized in that:
- The rear end of the first cylinder is connected with a first rear stopper, which has a first rear stopper connecting pipe interface;
- The second connecting pipe is connected to the first rear chamber through the first rear stopper connecting pipe interface;
- The rear end of the second cylinder is connected with a second rear stopper, which has a second rear stopper connecting pipe interface;
- The first connecting pipe is connected to the second rear chamber through the second rear stopper connecting pipe interface.
The synchronous linkage gas spring according to claim 3, characterized in that:
- The first guiding seal connecting pipe interface is arranged opposite to the second rear stopper connecting pipe interface,
- The second guiding seal connecting pipe interface is arranged opposite to the first rear stopper connecting pipe interface,
- Splicing the first gas spring and the second gas spring together vertically.
The synchronous linkage gas spring according to claim 2, characterized in that:
- The first gas spring and the second gas spring are connected back-to-back,
- A spacer is set between the first rear chamber and the second rear chamber.
The synchronous linkage gas spring according to claim 5, characterized in that:
- The spacer is equipped with a first spacer interface connected to the first rear chamber and a second spacer interface connected to the second rear chamber;
- The first connecting pipe is connected to the second rear chamber through the second spacer interface,
- The second connecting pipe is connected to the first rear chamber through the first spacer interface.
The synchronous linkage gas spring according to claim 6, characterized in that:
- A sealing ring is provided at the position where the middle of the spacer fits with the cylinder wall.
The synchronous linkage gas spring according to any one of claims 2-7, characterized in that:
- A pair of sealing rings is set between the first guiding seal and the first cylinder on both sides of the first guiding seal connecting pipe interface;
- A pair of sealing rings is set between the second guiding seal and the second cylinder on both sides of the second guiding seal connecting pipe interface.
The synchronous linkage gas spring according to any one of claims 1-7, characterized in that:
- A sealing ring is provided on the fitting surface between the first piston and the first cylinder;
- A sealing ring is provided on the fitting surface between the second piston and the second cylinder.
The synchronous linkage gas spring according to claim 8, characterized in that:
- A sealing ring is provided on the fitting surface between the first piston and the first cylinder;
- A sealing ring is provided on the fitting surface between the second piston and the second cylinder.

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Tags: leiyan gas spring patent, Synchronous Linkage Gas Spring

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