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

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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.