Tag: lockable gas spring patent
A Lockable Valve Body Piston Device with Altered Performance
Patent No.:CN113007258A Date:2021-04-27
Google Patent: https://patents.google.com/patent/CN113007258A/en?oq=CN113007258A
China Patent: http://epub.cnipa.gov.cn/
A Lockable Valve Body Piston Device with Altered Performance
Abstract
The present invention provides a lockable valve body piston device with altered performance. The device comprises a closed cavity, a piston assembly and a valve core assembly. The piston assembly includes a piston rod, a piston body and a seal. The piston body consists of a connecting part and a shaft shoulder part that are integrally connected. The shaft shoulder part is provided with a plurality of flow-through holes, extension damping holes and a plurality of compression flow-through holes. By means of the seal that is displaced by friction, the compression flow-through holes can be closed or opened to achieve the function of switching the flow rate of gas or medium oil. At the same time, the requirements of extension and compression movements are met, resulting in beneficial effects such as stable spring speed, stable working state, high safety and long service life. This solves the problem in the prior art that when adjusting the damping hole diameter, the design requirements of both extension and compression movements cannot be satisfied simultaneously, causing inconvenience in use, unstable working state, poor safety performance, and greatly reducing the consistency, smoothness and service life of the product.
Description
A Lockable Valve Body Piston Device with Altered Performance
Technical Field
The present invention relates to the field of gas springs, and specifically to a lockable valve body piston device with altered performance.
Background Art
A gas spring is a component capable of achieving functions such as support, buffering, braking, height and angle adjustment. In construction machinery, it is mainly applied to parts such as covers and doors. A gas spring mainly consists of a piston rod, a piston, a sealing guide sleeve, filling materials, a pressure cylinder, connectors, etc. The pressure cylinder is a closed cavity, filled with inert gas or an oil-gas mixture inside, and the pressure in the cavity is several times or dozens of times that of the atmospheric pressure.
When the valve body piston of a traditional gas spring undergoes extension or compression movement, the power gas or medium oil in the gas spring cylinder flows through the same damping hole. Its motion characteristics have at least the following problems:
- When the damping hole diameter is small, the damping force is relatively large, which meets the spring speed requirement of the piston’s extension movement speed. However, the compression movement will be relatively difficult, making the implementation of the compression movement difficult and inconvenient to use.
- When the damping hole diameter is large, the damping force is relatively small, which makes the compression movement easier. But the spring speed of the extension movement cannot be well damped and controlled, resulting in an unstable working state, poor safety performance, and greatly reducing the consistency, smoothness, and service life of the product.
Summary of the Invention
In view of this, the present invention provides a lockable valve body piston device with altered performance, which can solve at least one of the above problems. By means of a seal that is displaced by friction, the compression flow – through holes can be closed or opened to switch the flow rate of gas or medium oil. The piston assembly has good damping force during both extension and compression movements, achieving a good buffering effect, smooth movement, and at the same time improving safety and service life. The structure is simple, easy to manufacture, and has broad application prospects.
To achieve the above – mentioned objectives, the present invention provides the following technical solutions: A lockable valve body piston device with altered performance includes a closed cavity, a piston assembly and a valve core assembly arranged in the closed cavity. The piston assembly includes a piston rod, a piston body arranged on the piston rod, and a seal arranged on the piston body. The piston body includes a connecting part connected to the piston rod and a shaft shoulder part. The shaft shoulder part is provided with a plurality of flow – through holes, extension damping holes, and compression flow – through holes. The seal is displaced by friction to close or open the compression flow – through holes.
In some preferred embodiments, the flow – through holes are straight through – holes.
In some preferred embodiments, the flow – through holes are inclined through – holes.
In some preferred embodiments, a plurality of the flow – through holes are evenly distributed on the end face of the shaft shoulder part. A groove for placing the seal is provided on the side surface of the shaft shoulder part, and the groove is in communication with the flow – through holes, the extension damping holes, and the compression flow – through holes.
In some preferred embodiments, the groove includes a first groove and a second groove. The seal includes a first seal and a second seal. The first seal is placed in the first groove, and the second seal is placed in the second groove.
In some preferred embodiments, the depth of the groove opening on the side of the first groove close to the compression flow – through holes is consistent, and the depth of the groove opening at the end close to the extension damping holes gradually increases.
In some preferred embodiments, a valve core hole for installing the valve core assembly is provided on the shaft shoulder part.
In some preferred embodiments, a snap – fit structure adapted to the structure of the connecting end of the piston rod is provided on the connecting part.
In some preferred embodiments, the number of the extension damping holes is one.
In some preferred embodiments, the number of the flow – through holes is greater than or equal to the number of the compression flow – through holes.
Characteristics and Advantages of the Present Invention
- When the present invention undergoes compression movement, all the compression flow – through holes are opened by the friction – displaceable seal. The power – source gas or medium oil flows out through a plurality of compression flow – through holes, damping holes, and multiple flow – through holes. The transmission flow rate is greatly increased, making the compression movement easier, convenient to use, and highly efficient.
- When the present invention undergoes extension movement, the friction – displaceable seal blocks all the compression flow – through holes. At this time, the release of the power – source gas or medium oil can only flow through a plurality of flow – through holes and then through a single extension damping hole. By changing the size of the extension damping hole, it is only necessary to fully meet the spring speed requirement of the extension movement without considering the implementation of the compression movement. Thus, beneficial effects such as stable spring speed, stable working state, high safety, and long service life are achieved, solving the problem that has plagued lockable gas springs at home and abroad for many years.
- By changing the number of compression flow – through holes and through – holes to meet the maximum flow rate of gas or medium oil when the valve core is in the open state, the structure is simple, easy to manufacture, and has broad application prospects.
- The co – existence design of the inclined groove bottom of the groove at one end close to the extension damping hole and the flat groove bottom of the groove at one end close to the compression flow – through holes is beneficial to the closing or opening of the compression air flow holes, which is convenient to use and ingeniously designed.
- By designing a plurality of flow – through holes as straight through – holes or inclined through – holes, the actual volume and size requirements of the present invention are met, which is convenient to use and has broad application prospects.
Description of the Drawings
The following drawings are provided to further understand the present application, and they form a part of the present application. They are only intended to schematically explain and illustrate the present invention, rather than to limit the scope of the present invention. In the drawings:
Figure 1 is a gas flow diagram of the lockable valve body piston device in extension movement in Embodiment 1 of the present application;
Figure 2 is a gas flow diagram of the lockable valve body piston device in compression movement in Embodiment 1 of the present application;
Figure 3 is a structural schematic diagram of the piston assembly with straight through – holes in Embodiment 1 of the present application;
Figure 4 is a structural schematic diagram of the piston assembly with inclined through – holes in Embodiment 2 of the present application.
Reference signs in the drawings:
- Closed cavity; 2. Valve core assembly; 3. Piston rod; 41. Connecting part; 42. Shaft shoulder part; 43. Extension damping hole; 44. Compression flow – through hole; 51. First seal; 52. Second seal; 421. Straight through – hole; 422. Inclined through – hole; 451. First groove; 452. Second groove; 4511. Inclined groove bottom.
Detailed Implementation
The following will disclose multiple embodiments of the present application through drawings, and clearly and completely describe the technical solutions of the present invention. The attached drawings that form a part of the present application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions of the present invention are used to explain the present invention and do not improperly limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, unless the direction is defined separately, the up, down, left, right, inner, outer and other directions involved in this text are based on the up, down, left, right, inner, outer and other directions shown in Figure 1 of the embodiment of the present application. If the specific posture changes, the directional indication will also change accordingly. The meaning of “multiple” and “a plurality of” is two or more, which is explained here together. The use of “first”, “second”, “third” and similar words does not represent any order, quantity or importance, but is only used to distinguish different components. In addition, in each embodiment of the present disclosure, the same or similar reference signs represent the same or similar components.
In the present invention, unless otherwise clearly defined and limited, terms such as “connection” and “fixation” should be understood in a broad sense. For example, “fixation” can be a fixed connection, a detachable connection, or an integral connection, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above – mentioned terms in the present invention can be understood according to specific situations.
In addition, the technical solutions between the various embodiments of the present invention can be combined with each other. However, this must be based on what can be achieved by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
Embodiment 1
Please refer to Figures 1 to 3. A lockable valve body piston device with altered performance in this embodiment includes a closed cavity 1, a piston assembly and a valve core assembly 2 arranged in the closed cavity 1. The piston assembly includes a piston rod 3, a piston body arranged on the piston rod 3, and a seal arranged on the piston body. In this embodiment, the seal is preferably a floating O – ring, but it is not limited to an O – ring, and other special – shaped seals can be selected according to the actual situation. Furthermore, the piston body includes a connecting part 41 connected to the piston rod 3 and a shaft shoulder part 42. A number of straight through – holes 421, an extension damping hole 43, and compression flow – through holes 44 are provided on the shaft shoulder part 42.
It should be noted that the number of the straight through – holes 421 can be 4, 6, or more appropriate numbers according to the actual situation.
Using the technical solution of this embodiment, as shown in Figure 1, the lockable valve body piston device of this embodiment is in the open state with the valve core opened. When the gas spring moves to the right during compression movement, the O – ring located in the groove of the piston body moves to the left by friction displacement and abuts against the left – hand side wall of the shaft shoulder part. And a number of straight through – holes 421 are arranged in the direction of the inner ring of the seal ring to keep the straight through – holes unblocked. At this time, the O – ring is separated from the groove bottom of the piston body, opening all the compression flow – through holes 44. The power – source gas or medium oil flows out through a number of compression flow – through holes 44, the damping hole 43, and a number of straight through – holes 421, forming an unobstructed and non – damped transmission channel. The transmission flow rate is greatly increased, making the compression movement easier, convenient to use, and highly efficient.
As shown in Figure 2, the lockable valve body piston device of this embodiment is in the open state with the valve core opened. When the gas spring moves to the left during extension movement, the O – ring that can be displaced by friction moves to the right and abuts against the right – hand side wall of the shaft shoulder part. At this time, the O – ring blocks all the compression flow – through holes 44, and the release of the power – source gas or medium oil can only flow through a number of straight through – holes 421 and then through a single extension damping hole 43. It should be noted that the size of the extension damping hole 43 can be set according to the spring speed requirement of the extension movement without considering the implementation of the compression movement. Therefore, this lockable valve body piston device meets the requirements of both extension and compression movements, achieving beneficial effects such as stable spring speed, stable working state, high safety, and long service life. It solves the problem in the prior art that when adjusting the damping hole diameter, the design requirements of both extension and compression movements cannot be met simultaneously, resulting in difficulties in implementing the compression movement, inconvenience in use, unstable working state, poor safety performance, and greatly reducing the consistency, smoothness, and service life of the product.
As a specific implementation method, in this embodiment, a number of straight through – holes 421 are evenly distributed on the end face of the shaft shoulder part 42 close to the connecting part 41. A first groove 451 and a second groove 452 are provided on the side surface of the shaft shoulder part 42. The seal includes a first seal 51 and a second seal 52. At the same time, the first seal 51 is placed in the first groove 451, and the second seal 52 is placed in the second groove 452. This design scheme adopts a thickened double – groove piston design, which is an innovative upgrade of the original piston in response to actual problems. The same valve core assembly can be used without changing the original valve body length, saving the development of new molds and thus reducing production costs.
As shown in Figure 3, as a specific implementation, in this embodiment, the depth of the groove opening of the first groove 451 at the end close to the compression flow – through hole 44 is consistent, and the depth of the groove opening at the end close to the extension damping hole 43 gradually increases.
Specifically, one end of the bottom of the first groove 451 is an inclined groove bottom 4511, and the other end is a flat groove bottom. The design of the co – existence of the inclined groove bottom and the flat groove bottom is beneficial to the closing or opening of the compression air flow holes. The design of the inclined groove bottom 4511 is beneficial for the separation of the groove bottom and the seal during the compression movement, ensuring the implementation of the flow – through state. It is convenient to use and ingeniously designed.
As a specific implementation, in this embodiment, a valve core hole for installing the valve core assembly 2 is provided on the shaft shoulder part 42.
As a specific implementation, in this embodiment, a snap – fit structure adapted to the structure of the connecting end of the piston rod 3 is provided on the connecting part 41. The snap – fit structure is a snap – head protrusion 411 provided at one end of the connecting part 41 away from the shaft shoulder part 42. The snap – head protrusion 411 is snapped into the annular groove of the piston rod. The structure is simple and the connection is firm.
As a specific implementation, in this embodiment, the number of the extension damping holes 43 is one, which can better ensure the stable spring speed of the extension movement, a stable working state, facilitate the design of the size of the damping hole, and improve safety and service life.
As a specific implementation, in this embodiment, the number of the straight through – holes 421 is greater than or equal to the number of the compression flow – through holes 44, which can better ensure the implementation of the compression movement.
Combined with the gas flow diagrams of the compression movement and the extension movement in Figure 1 and Figure 2, the working principle of the lockable valve body piston device of this embodiment applied to the gas spring is described as follows:
- Compression movement: Open the valve core. When the gas spring moves to the right during compression movement, the O – ring located in the groove of the piston body moves to the left by friction displacement and abuts against the left – hand side wall of the shaft shoulder part. And a number of straight through – holes 421 are arranged in the direction of the inner ring of the seal ring to keep the straight through – holes unblocked. At this time, the O – ring is separated from the groove bottom of the piston body, opening all the compression flow – through holes 44. The power – source gas or medium oil flows out through a number of compression flow – through holes 44, the damping hole 43, and a number of straight through – holes 421, forming an unobstructed and non – damped transmission channel. The transmission flow rate is greatly increased, making the compression movement easier, convenient to use, and highly efficient.
- Extension movement: Open the valve core. When the gas spring moves to the left during extension movement, the O – ring that can be displaced by friction moves to the right and abuts against the right – hand side wall of the shaft shoulder part. At this time, the O – ring blocks all the compression flow – through holes 44, and the release of the power – source gas or medium oil can only flow through a number of straight through – holes 421 and then through a single extension damping hole 43. It should be noted that the size of the extension damping hole 43 can be set according to the spring speed requirement of the extension movement without considering the implementation of the compression movement. Therefore, this lockable valve body piston device meets the requirements of both extension and compression movements, achieving beneficial effects such as stable spring speed, stable working state, high safety, and long service life. It solves the problem in the prior art that when adjusting the damping hole diameter, the design requirements of both extension and compression movements cannot be met simultaneously, resulting in difficulties in implementing the compression movement, inconvenience in use, unstable working state, poor safety performance, and greatly reducing the consistency, smoothness, and service life of the product.
Embodiment 2
The difference between this embodiment and Embodiment 1 is that, as shown in Figure 4, the flow – through holes in this embodiment are inclined through – holes 422, which are mainly applied to products of devices such as dampers and gas springs with small cylinder diameters and double cylinders.
Specifically, this lockable valve body piston device is to be applied in cylinder barrels with different pipe diameters. Therefore, it is necessary to reasonably select the maximum outer diameter of the piston assembly and the position of the flow – through holes. When the relative height of the shaft shoulder part with respect to the connecting part is limited, the design of making the flow – through holes into inclined through – holes is ingenious and reasonable.
In conclusion, through the seal displaced by friction, the compression flow – through holes are closed or opened to achieve the function of switching the flow rate of gas or medium oil. At the same time, the requirements of both extension and compression movements are met, thus achieving beneficial effects such as stable spring speed, stable working state, high safety, and long service life. This solves the problem in the prior art that when adjusting the damping hole diameter, the design requirements of both extension and compression movements cannot be met simultaneously, resulting in difficulties in implementing the compression movement, inconvenience in use, unstable working state, poor safety performance, and greatly reducing the consistency, smoothness, and service life of the product.
The above description shows and describes the preferred embodiments of the present application. However, as mentioned before, it should be understood that the present application is not limited to the forms disclosed herein. It should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications, and environments, and can be modified within the scope of the concept of the present application through the above – mentioned teachings or the technologies or knowledge in related fields. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present application shall fall within the protection scope of the appended claims of the present application.
Claims – A Lockable Valve Body Piston Device with Altered Performance, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacturer.
- A lockable valve – body piston device with altered performance, comprising a closed cavity, a piston assembly and a valve – core assembly arranged in the closed cavity, characterized in that:
The piston assembly comprises a piston rod, a piston body arranged on the piston rod, and a seal arranged on the piston body;
The piston body comprises an integrated connecting part and a shaft – shoulder part. A plurality of flow – through holes, an extension damping hole and a plurality of compression flow – through holes are arranged on the shaft – shoulder part; the seal is displaced by friction to close or open the compression flow – through holes. - The lockable valve – body piston device with altered performance according to claim 1, characterized in that the flow – through holes are straight through – holes.
- The lockable valve – body piston device with altered performance according to claim 1, characterized in that the flow – through holes are inclined through – holes.
- The lockable valve – body piston device with altered performance according to any one of claims 1 to 3, characterized in that a plurality of the flow – through holes are evenly distributed on the end face of the shaft – shoulder part, and a groove for placing the seal is arranged on the side surface of the shaft – shoulder part, and the groove is in communication with the flow – through holes, the extension damping hole and the compression flow – through holes.
- The lockable valve – body piston device with altered performance according to claim 4, characterized in that the groove comprises a first groove and a second groove, the seal comprises a first seal and a second seal, the first seal is placed in the first groove, and the second seal is placed in the second groove.
- The lockable valve – body piston device with altered performance according to claim 5, characterized in that the depth of the groove opening of the first groove at the end close to the compression flow – through holes is consistent, and the depth of the groove opening at the end close to the extension damping hole gradually increases.
- The lockable valve – body piston device with altered performance according to claim 1, characterized in that a valve – core hole for installing the valve – core assembly is arranged on the shaft – shoulder part.
- The lockable valve – body piston device with altered performance according to claim 1, characterized in that a snap – fit structure adapted to the structure of the connecting end of the piston rod is arranged on the connecting part.
- The lockable valve – body piston device with altered performance according to claim 1, characterized in that the number of the extension damping holes is one.
- The lockable valve – body piston device with altered performance according to claim 1, characterized in that the number of the flow – through holes is greater than or equal to the number of the compression flow – through holes.
A Lockable Gas Spring with Light Compression Force
Patent No.:CN201487117U Date:2009-06-15
Google Patent: https://patents.google.com/patent/CN201487117U/en?oq=CN201487117U
China Patent: http://epub.cnipa.gov.cn/
A Lockable Gas Spring with Light Compression Force
Abstract
This utility model provides a lockable gas spring with light compression force and customizable extension speed. It includes a cylinder, a guide sealing sleeve, a rear seal, and a piston. The front end of the cylinder’s inner chamber is fixed with a guide sealing sleeve, and the end is fixed with a rear seal. A piston is installed inside the chamber, which is step-shaped, with a valve needle at the center. The lower end surface of the piston has several through holes that communicate with the valve needle, and a sealing device covers these through holes. By setting multiple through holes in the piston, the flow rate of gas and liquid per unit time is increased, reducing channel damping, lightening compression, and increasing speed.
Description
A Lockable Gas Spring with Light Compression Force
Technical Field This utility model relates to a gas spring, specifically a lockable gas spring with light compression force.
Background Technology Gas springs are widely used in medical equipment, automobiles, furniture, textile equipment, and processing industries. However, there are few types of lockable gas springs, which often feel heavy during compression and slow to close during extension, limiting their range of use.
Utility Model Content The technical problem this utility model aims to solve is to provide a lockable gas spring with light compression force and customizable extension speed.
To solve the above technical problems, the utility model provides the following technical solution: a lockable gas spring with light compression force, comprising a cylinder, a guide sealing sleeve, a rear seal, and a piston. The front end of the cylinder’s inner chamber is fixed with a guide sealing sleeve, and the end is fixed with a rear seal. A piston is installed inside the chamber, which is step-shaped, with a valve needle at the center. It is characterized by: several through holes evenly distributed on the lower end surface of the piston, communicating with the valve needle, and a sealing device covering these through holes.
Further, the sealing device includes a valve cover and a limit spring. The valve cover is fitted on the lower end surface of the piston with through holes, and a limit spring is fixed on the piston above the valve cover.
Advantages of the Utility Model By setting multiple through holes in the piston, the flow rate of gas and liquid per unit time is increased, reducing channel damping, lightening compression, and increasing speed. The extension speed can be adjusted by changing the fitting gap between the valve cover and the piston.
Description of Drawings
Figure 1 is a schematic diagram of the lockable gas spring with light compression force.
Figure 2 is a schematic diagram of the piston structure of the lockable gas spring with light compression force.
Detailed Implementation As shown in Figures 1 and 2, it includes a cylinder 1, a guide sealing sleeve 2, a rear seal 3, a piston 4, a piston rod 5, a valve needle 6, an activation rod 7, through holes 8, and a sealing device 9.
The front end of the cylinder 1’s chamber is fixed with a guide sealing sleeve 2, and the end is fixed with a rear seal 3. A step-shaped piston 4 is connected inside the chamber, with the piston 4 connected to the piston rod 5. A valve needle 6 is connected inside the piston 4, and an activation rod 7 is installed inside the piston rod 5, connected to the valve needle 6.
To achieve light compression and extension functions for the gas spring, the piston 1 was modified as follows: as shown in Figure 2, the lower end surface of the piston 1 has several through holes 8 communicating with the valve needle 6. The lower end surface of the piston 1, connected to the through holes 8, is equipped with a sealing device 9. The specific structure of the sealing device 9 includes a valve cover 10 and a limit spring 11. The ring-shaped valve cover 10 is fitted on the lower end surface of the piston 4 with through holes 8, and the limit spring 11 is fixed on the piston 4 above the valve cover 10.
During the downward compression of the gas spring, the activation rod 7 opens the valve needle 6, allowing the gas at the bottom of the cylinder 1 to quickly flow through the evenly distributed through holes 8 and lift the valve cover 10 into the upper part of the cylinder 1, reducing channel damping. The extension and compression feel lighter. Due to the action of the limit spring 11 above the valve cover 10, the opening of the valve cover 10 is limited to a certain range, ensuring it quickly closes when extension stops. The extension speed of the gas spring relies on the fitting gap between the valve cover 10 and the piston 4. Changing the fitting gap alters the flow rate of gas or gas-liquid mixture, thus changing the extension speed.
Claims (2) – A Lockable Gas Spring with Light Compression Force, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacturer
- A lockable gas spring with light compression force, comprising a cylinder, a guide sealing sleeve, a rear seal, and a piston. The front end of the cylinder’s inner chamber is fixed with a guide sealing sleeve, and the end is fixed with a rear seal. A piston is installed inside the chamber, which is step-shaped, with a valve needle at the center. It is characterized by: several through holes evenly distributed on the lower end surface of the piston, communicating with the valve needle, and a sealing device covering these through holes.
- According to claim 1, characterized by: the sealing device includes a valve cover and a limit spring. The valve cover is fitted on the lower end surface of the piston with through holes, and a limit spring is fixed on the piston above the valve cover.
Auto-Reset Lockable Gas Spring
Patent No.:CN201198885 Date:2008-04-28
Google Patent: https://patents.google.com/patent/CN201198885Y/en?oq=CN201198885
China Patent: http://epub.cnipa.gov.cn/
Abstract
This utility model provides an auto-reset lockable gas spring, composed of a cylinder, piston, and rear plug. The floating piston inside the cylinder divides it into two chambers, filled with nitrogen and hydraulic oil respectively. In the chamber filled with hydraulic oil, the piston is sealed with an O-ring. The piston is connected to a piston rod, valve core assembly, and valve needle. A wide groove is created on the piston, with the O-ring situated in the groove, and a reset hole is also made on the piston. This design incorporates a reset hole in the piston of the gas spring, and through the coordination of the piston, reset hole, and O-ring, it not only achieves automatic resetting but also enables a slow and steady extension and resetting function due to the internal pressure of the gas spring when external force is lost. This function is applicable to any type of lockable gas spring.
Description
A Type of Auto-Reset Lockable Gas Spring
Technical Field The utility model relates to a gas spring, specifically a gas spring that can automatically reset and be lockable.
Background Technology Currently, the market offers various types of lockable gas springs, but they are limited to the locking adjustment function and cannot achieve automatic resetting. With the widespread application of gas springs, devices such as bus seats, airplane cabin seats, and other single gas, gas-oil mixed, and gas-oil separated types of equipment can all be designed for automatic resetting to enhance convenience. However, there has not been an auto-reset lockable spring that can meet these needs.
Utility Model Content This utility model provides an auto-reset lockable gas spring.
To solve the above technical problems, this utility model provides an auto-reset lockable gas spring, which consists of a cylinder, a piston, and a rear plug. Inside the cylinder is a floating piston that divides the cylinder into two chambers filled with nitrogen and liquid oil, respectively. In the chamber filled with hydraulic oil, the piston is sealed with an O-ring. The piston is connected to a piston rod, valve core assembly, and valve needle. The characteristic of this design is that the piston has a wide groove with an O-ring in it and a reset hole on the piston.
The width of the groove on the piston is twice the diameter of the O-ring.
The reset hole consists of a vertical hole and a horizontal hole.
The horizontal hole of the reset hole is located at the centerline of the groove width on the piston.
Advantages of the Structure: The innovation of this structure lies in adding a reset hole to the piston, and through the coordination of the piston, reset hole, and O-ring, it achieves automatic resetting. In the absence of external force, due to the internal pressure of the gas spring, it can achieve a slow return of gas in both chambers, slowly extending and resetting. This function is applicable to any type of lockable gas spring.
Description of Drawings
Figure 1 is a schematic diagram of the structure of this utility model.
Figure 2 is an enlarged view of the piston of this utility model.
Detailed Implementation As shown in Figures 1 and 2, the bottom of the gas spring cylinder 1 is fixed with a rear plug 11, and inside it is a floating piston 2. The floating piston 2 divides the cylinder 1 into two chambers, filled with nitrogen 3 and liquid oil 4, respectively. In the chamber filled with hydraulic oil 4, the piston 6 is sealed with an O-ring 5. The piston 6 is connected to the valve core assembly 8, valve needle 9, piston rod 7, and the activation rod 10 on the piston rod 7. The main innovation of this structure lies in increasing the width of the groove 15 on the piston 6 to twice the diameter of the O-ring 5 and adding a reset hole 12 on the piston 6. The reset hole 12 consists of a vertical hole 13 and a horizontal hole 14, with the horizontal hole 14 located at the centerline of the groove width on the piston 6. The O-ring 5 moves up and down within the wide groove 15 on the piston 6 along the horizontal hole 14 of the reset hole 12, sealing as the lockable gas spring is compressed and extended. When the lockable gas spring is in a compressed state, the O-ring 5 floats to the upper end of the horizontal hole 14 of the reset hole 12 for sealing. During the extension adjustment, the O-ring 5 floats to the lower end of the horizontal hole 14 of the reset hole 12 for sealing. The compression and extension adjustment of this spring are the same as other lockable gas springs. The difference is that in the absence of external force, due to the internal pressure of the lockable gas spring, the O-ring 5 also floats to the lower end of the horizontal hole 14 of the reset hole 12, thus achieving the function of slowly returning gas in both chambers and slowly extending and resetting. This function is suitable for any type of lockable gas spring, including single gas, gas-oil mixed, gas-oil separated (including front separation and rear separation) types.
Claims (4) – Auto-Reset Lockable Gas Spring invented by LeiYan Gas Springs
- A Type of Auto-Reset Lockable Gas Spring, consisting of a cylinder, piston, and rear plug, with a floating piston built inside the cylinder. The floating piston divides the cylinder into two chambers filled with nitrogen and liquid oil respectively. In the chamber filled with hydraulic oil, the piston is sealed with an O-ring. The piston is connected to a piston rod, valve core assembly, and valve needle. It is characterized by: a wide groove on the piston, with the O-ring situated in the groove, and a reset hole on the piston.
- According to claim 1, the width of the groove on the piston is twice the diameter of the O-ring.
- According to claim 1, the reset hole consists of a vertical hole and a horizontal hole.
- According to claim 3, the horizontal hole of the reset hole is located at the centerline of the groove width on the piston.
Controllable adjustable two-way rigidity locking gas spring
Patent No.:CN2746201 Date:2004.11.11
Google Patent: https://patents.google.com/patent/CN2746201Y/en?oq=CN2746201
China Patent: http://epub.cnipa.gov.cn/
Abstract
The utility model discloses a controllable adjustable two-way rigidity locking gas spring, overcoming the defect that the existing spring only can be one-way rigidity locked in prior art. The utility model consists of a cylindrical shell, a cylinder rod and a piston. The piston is provided with an orifice and a center through-hole and a valve needle is provided inside the center through-hole. One end of the valve needle is connected with a regulating stem. The other end of the cylindrical shell is sealed by a rear block and a floating piston is provided between the piston and the rear block. Thus, the cylindrical shell is divided into an air chamber and a hydraulic-oil chamber. A float trap is provided between the piston and the floating piston. The utility model can adopt the method of the existing product and adjust the latched position at can by the regulating stem. The function of two-way rigidity locking can be achieved after loosening hands. The effect of hydraulic damping is likewise provided and the resistance to shock is good. The utility model has the advantages of simple structure, original conception, good sealing property, etc. The utility model can be extensively used in the fields of medical bed for turning body, aviation, vehicle seat for adjusting back support, etc.
Description
Controllable two-way rigid locking air spring
Technical field
The air spring manufacturing technology field that the utility model relates to and a kind ofly is used for that medical bed is leaned to one side, aviation and vehicle seat back are regulated especially refers to the two-way rigid locking device of air spring.
Background technique
The invention of air spring technology and the history of using existing decades thereof, that sells on the market is of a great variety, and it mainly utilizes the pressurized gas in the sealed cylinder block, through going to promote the motion of piston rod after the damping of hydraulic piston.For example 93110703.2 applications for a patent for invention that are called ” hydraulically controlled pneumatic elastic jackstay ” of disclosed application number on February 16th, 1994, ” piston rod second half section cavity pneumatic or the hydraulic control elastic jackstay is slightly larger than preceding half section cavity; be provided with poppet shaft in its second half section cavity; form main damping oil pocket between the front-end face of poppet shaft ear end face and cylinder body rear portion inner carrier; piston rod between the inwall of the outer wall of one section body between big end of its afterbody and the stuffing box gland and cylinder body relevant position, form auxilliary damping oil pocket, assist the damping oil pocket and when poppet shaft is opened, be connected by the damping hole on the big end of piston rod afterbody.” this product has that strut elasticity is strong, speed is easy to control and advantage such as arbitrary position locking.But anatomize this patent application prospectus, in conjunction with practical application experience, the claimant has found that this product has the defective that can not reach two-way rigid locking, and promptly when being subjected to pressure stress, this series products can only reach elastic locking, but not rigid locking.This elastic locking scope and air chamber air pressure are inversely proportional to.Therefore, this series products be applied to medical bed lean to one side to support the time, must have rocking to a certain degree, it is required to satisfy clinical treatment.Manufacturer is in order to dwindle its elastic locking distance, has to improve air chamber air pressure offsetting external force so that product when making the requirement for gas sealing ability improve again and again, cost of production increases greatly.
The model utility content
The technical problems to be solved in the utility model is the air spring product that a kind of novelty is provided to society, this product is arbitrarily adjusted locked position by adjustable lever, can reach two-way rigid locking function after loosing one’s grip, to overcome deficiency that only possesses unidirectional rigid locking function and the defective that prior art exists, satisfied more technical fields are required for the installation of hydraulically controlled pneumatic elastic parts.
The technological scheme that its technical problem that solves the utility model adopts is: controllable two-way rigid locking air spring comprises that a cylindrical shell and an end insert into the inner the piston rod in chamber, and the piston rod end of stretching into the circular cylindrical shell intracoelomic cavity is connected with piston; Piston is established damping hole and central through bore, is provided with needle in the central through bore, and needle one end is connected with adjustable lever; The other end of cylindrical shell is established floating piston by back stifled the sealing between piston and back blocking up, the circular cylindrical shell intracoelomic cavity is divided into air chamber and fluid chamber, establishes floating valve between described piston and floating piston.
Described floating valve is embedded in the inward flange of cylindrical shell, fixes along the axle directions X; Inward flange and floating valve circumferential surface middle part are provided with seal ring.
Described floating valve includes spool, Returnning spring and Sealing.
The controllable two-way rigid locking air spring product of the utility model is set up a floating valve between piston and floating piston, this floating valve is embedded in the inward flange of cylindrical shell, fixes along the axle directions X.This product is under lock state, and when piston rod was subjected to pressure stress, piston promoted hydraulic oil and flows, and makes the floating valve quick closedown, and air spring is realized the rigid locking function.Therefore, this product air chamber air pressure needn’t fill De Taigao, only needing normally to promote piston rod bounce-back answer gets final product, its rigid locking task in compressive state is finished by floating valve entirely, can reduce in the air chamber manufacture process requirement greatly for gas sealing ability, promptly can save production cost, can prevent gas leakage again.This product can be continued to use the existing product mode and arbitrarily adjust locked position by adjustable lever in use, but can reach two-way rigid locking state after loosing one’s grip.During bounce-back, have the hydraulic damping effect equally, shock-absorbing capacity is good.This product structure is simple, novel, anti-leak gas performance is good, can be widely used in that medical bed is leaned to one side, field such as aviation and vehicle seat back adjusting.
Description of drawings
Fig. 1 is the utility model structural representation.
Fig. 2 is the utility model locking stroke adjusting device structural representation.
Embodiment
As shown in Figure 1 and Figure 2, the controllable two-way rigid locking air spring of the utility model comprises that with axle X be the cylindrical shell 23 of a core and the piston rod 24 that an end inserts into the inner the chamber, and piston rod 24 ends of stretching into cylindrical shell 23 inner chambers are connected with piston 5.The other end of cylindrical shell 23 is given airtight by back stifled 14, the center of back stifled 14 is embedded with steel ball 13 so that charge into high pressure nitrogen.Cylindrical shell 23 inner chambers adjacent with back stifled 14 are air chamber 12, establish floating piston 15 between piston 5 and back block up 14, and cylindrical shell 23 inner chambers are divided into air chamber 12 and fluid chamber 8.Floating piston 15 circumferential surfaces are embedded with seal ring, realize and the partition of cylindrical shell 23 inwalls that piston 5 is isolated into fluid chamber 8 B chamber and C chamber again.Stretch out at piston rod 24 roots of cylindrical shell 23 outsides and establish cushion collar 1, to slow down external impact.For the smooth running that guarantees piston rod 24 and prevent the hydraulic oil seepage, cylindrical shell 23 inner chambers that are away from stifled 14 1 ends in back are established guide sleeve 2, seal ring 3 and spacer 22 successively.As shown in Figure 2, be provided with the locked position controlling device between B chamber and the C chamber, described locked position controlling device comprises the needle 19 of being located at piston 5 central through bores, is located at the damping hole 26 on piston 5 peripheral wall and is positioned at piston rod 24 center holes and peak at the adjustable lever 25 of needle 19.For guaranteeing the sealability of piston B chamber, 5 both sides and C chamber, needle 19 is with seal ring 20, septulum cover 6, seal ring 20 and jump ring 7 from left to right successively.For prevent hydraulic oil from the C chamber through piston rod 24 center hole seepages, establish pad 21 and seal ring 4 at the piston rod 24 and the joint of piston 5.With respect to existing product, the utility model product is set up floating valve 9 between piston 5 and floating piston 15, this floating valve 9 is embedded in the inward flange 10 of cylindrical shell 23, fix along the axle directions X, inward flange 10 is established a seal ring 11 with floating valve 9 circumferential surfaces middle part, prevents that hydraulic oil is from seepage between floating valve 9 circumferential surfaces and cylindrical shell 23 internal chamber walls.Floating valve 9 is provided with spool 18, Returnning spring 17 and is used for the Sealing 16 of plane sealing.
Continue to narrate in conjunction with the accompanying drawings working principle of the present utility model below.Before this product export, earlier inject hydraulic oil toward fluid chamber 8, stifled 14 charge into air chamber 12 with nitrogen from the back, with steel ball 13 shutoff sealing.
In conjunction with Fig. 1, shown in Figure 2, when the locked position of the utility model product is regulated, force in adjustable lever 25 and back down needle 19, the hydraulic circuit between B chamber and the C chamber thin bar 28 and septulum overlap 6 inwalls through needle 19 middle parts gap, septulum overlap 6 cinclides 27, piston 5 damping holes 26 and mutual conduction.Then, drive pistons 5 and move to right by promoting piston rod 24, behind the hydraulic oil pressurized of B chamber, oil pressure is acted on spool 18 and make it to move to right, 9 moments of floating valve close, and B chamber hydraulic oil can’t flow to the A chamber.Meanwhile, because B chamber hydraulic oil pressurized, beginning flow to the C chamber after gap, septulum that thin bar 28 in needle 19 middle parts and septulum overlap 6 inwalls overlap 6 cinclides 27, piston 5 damping holes 26.After reaching the required locked position of user, unclamp adjustable lever 25, the external pressure that B chamber hydraulic oil bears disappears, air chamber 12 promotes floating piston 15 and moves to left, and spool 18 is opened under spring 17 effects again, oil pressure is passed to the B chamber by the A chamber, and oil pressure pushes back to piston 5 central through bores with needle 19, and oil circuit cuts off and closes between B chamber and the C chamber.At this moment, when piston rod 24 was subjected to outside tensile stress, because C chamber hydraulic oil is in the state of sealing, piston rod 24 was in the rigid locking state.And when piston rod 24 was subjected to outside pressure stress, B chamber hydraulic oil pressurized, oil pressure acted on spool 18, spool 18 is moved to right, and 9 moments of floating valve close, and B chamber hydraulic oil can’t flow to the A chamber, B chamber hydraulic oil is in the state of sealing, and piston rod 24 is in the rigid locking state.
When the locked position of the utility model product is automatically reset, only force in adjustable lever 25 and back down needle 19, and piston rod 24 is not applied external force.As in the previous paragraph, hydraulic circuit between B chamber and the C chamber thin bar 28 and septulum overlap 6 inwalls through needle 19 middle parts gap, septulum overlap 6 cinclides 27, piston 5 damping holes 26 and mutual conduction, air chamber 12 promotes floating piston 15 and moves to left, hydraulic oil flows into the B chamber through floating valve 9 by the A chamber, B chamber oil pressure acts on piston 5 right flanks, and piston 5 and piston rod 24 are released cylindrical shell 23 inner chambers.The volume that air chamber 12 increases equals the volume that piston rod 24 stretches out the C chamber.Simultaneously the C chamber volume that causes reduces because piston 5 and piston rod 24 move to left, and C chamber hydraulic oil overlaps the gap that 6 cinclides 27, the thin bar 28 in needle 19 middle parts and septulum overlap 6 inwalls through piston 5 damping holes 26, septulum, is back to the B chamber.C chamber hydraulic oil produces liquid damping buffering effect to piston 5 left surfaces in flowing to B chamber process, thus realize piston rod 24 slowly and elasticity is stretched out, its speed of stretching out then depends on the diameter dimension of piston 5 damping holes 26.
Claims (3)
1, a kind of controllable two-way rigid locking air spring comprises that a cylindrical shell and an end insert into the inner the piston rod in chamber, and the piston rod end of stretching into the circular cylindrical shell intracoelomic cavity is connected with piston; Piston is established damping hole and central through bore, is provided with needle in the central through bore, and needle one end is connected with adjustable lever; The other end of cylindrical shell is established floating piston by back stifled the sealing between piston and back blocking up, the circular cylindrical shell intracoelomic cavity is divided into air chamber and fluid chamber, it is characterized in that establishing floating valve between described piston and the floating piston.
2, controllable two-way rigid locking air spring as claimed in claim 1 is characterized in that described floating valve is embedded in the inward flange of cylindrical shell, fixes along the axle directions X; Inward flange and floating valve circumferential surface middle part are provided with seal ring.
3, controllable two-way rigid locking air spring as claimed in claim 1 or 2 is characterized in that described floating valve includes spool, Returnning spring and Sealing.