Gas spring with a deceleration device

Abstract

The utility model discloses a gas spring with speed reducer, including outer tube, valve body, hollow valve body, hollow piston rod and control rod subassembly, still include the valve piece of hollow valve body on, hollow valve body is provided with at least one oil hole, and oil hole is linked with second oil chamber intercommunication, and the valve piece is equipped with the valve lobe corresponding with the number of oil hole, valve lobe is used to shelter oil hole, because the process of oil liquid from oil hole to second oil chamber in the compression time, oil liquid will lift valve lobe, make oil liquid can smoothly flow from first oil chamber to second oil chamber, realize quick compression hollow piston rod, and when reset, the oil liquid of second oil chamber can only flow from the part of oil hole remaining uncovered to first oil chamber, and the speed of oil liquid flow is slowed down, therefore, the speed of hollow piston rod ejection is also relatively slow, improve the comfort of user, reduce the damage caused by quick reset, improve the service life of controllable gas spring.

Description

Technical Field

[0001] This utility model relates to the field of gas spring technology, specifically a gas spring with a deceleration device. Background Technology

[0002] In recent years, with the improvement of people's living standards, people have higher and higher requirements for daily necessities. Adjustable furniture is becoming increasingly popular. Gas springs are a type of part mainly used in adjusting furniture. However, existing gas springs can only extend and retract in their entire range and cannot stop at any distance. In addition, some gas springs reset very quickly. Frequent and rapid resets can easily damage the gas springs and reduce their service life.

[0003] Currently, gas springs on the market are designed with a smaller diameter for the oil passage hole to solve the above problems. However, while this method can solve the problem of the piston rod popping out quickly, it also causes the oil to be unable to pass through the oil passage hole quickly during the compression of the hollow piston rod. Therefore, it will encounter greater resistance during compression and the performance will be poor. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a gas spring with a deceleration device, which can effectively solve the technical problems mentioned in the background art.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a gas spring with a deceleration device includes an outer tube, a valve body, a hollow valve body, a hollow piston rod, and a control rod assembly. The valve body is slidably installed inside the outer tube and divides the inner cavity of the outer tube into a gas chamber and an oil chamber. The hollow valve body is slidably installed inside the outer tube and divides the oil chamber into a first oil chamber and a second oil chamber. One end of the hollow piston rod is connected to the hollow valve body, and the other end of the hollow piston rod slides through the outer tube. One end of the control rod assembly slides into the hollow valve body and is used to open or close the hollow valve body. The other end of the control rod assembly extends out of the hollow piston rod. It also includes a valve plate fitted on the hollow valve body. The hollow valve body is provided with at least one oil passage hole, which is interconnected with the second oil chamber. The valve plate is provided with a valve flap corresponding to the number of oil passage holes. The valve flap is used to block the oil passage holes.

[0006] Furthermore, the hollow valve body is provided with a slot, and the inner wall of the valve plate is formed with a protrusion. The valve plate is embedded in the slot through the protrusion to achieve a tight connection with the hollow valve body.

[0007] Furthermore, the valve plate is provided with hollow grooves corresponding to the number of valve discs, so that the valve discs can move relative to the valve plate under hydraulic action and expose the oil passage hole.

[0008] Furthermore, the control rod assembly includes a push pin, a connecting rod, and a first seal. One end of the push pin is connected to the connecting rod. The first seal is fitted to the end of the push pin near the connecting rod and is interference-fitted with the hollow valve body to prevent oil from flowing along the push pin to the connecting rod. The hollow valve body is equipped with a second seal. The other end of the push pin is provided with a sealing protrusion. The sealing protrusion and the second seal are interference-fitted to form a sealing structure to close the hollow valve body. The connecting rod is slidably installed in the hollow piston rod. Pushing the connecting rod causes the sealing protrusion to move away from the second seal, creating a gap between the sealing protrusion and the second seal to form an oil passage, so that the first oil chamber and the second oil chamber are interconnected.

[0009] Furthermore, the inner wall of the hollow valve body is formed with at least one limiting protrusion, which is used to restrict the movement of the second seal and fix it in the hollow valve body.

[0010] Furthermore, the connecting rod is provided with a protrusion for limiting the position, and the hollow piston rod is provided with an inclined surface that matches the protrusion.

[0011] Furthermore, both the valve body and the outer edge of the hollow valve body are fitted with sealing rings, which are in close contact with the inner wall of the outer tube.

[0012] Furthermore, the valve disc and valve plate are an integral structure, and the width of the valve disc is smaller than the diameter of the oil passage hole.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] During compression, as the oil flows from the oil passage to the second oil chamber, it pushes up the valve disc, allowing the oil to flow smoothly from the first oil chamber to the second oil chamber, thus rapidly compressing the hollow piston rod. During reset, the oil in the second oil chamber can only flow from the remaining uncovered portion of the oil passage to the first oil chamber, slowing down the oil flow. Therefore, the hollow piston rod ejects more slowly, improving user comfort, reducing damage caused by rapid reset, and extending the service life of the controllable gas spring. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a compressed hollow piston rod;

[0016] Figure 2 This is a schematic diagram of the hollow valve body in its closed state.

[0017] Figure 3 A schematic diagram of the structure in which the hollow piston rod pops out;

[0018] Figure 4 for Figure 1 Enlarged view of the structure of section A;

[0019] Figure 5 for Figure 2 Enlarged view of the structure of section B;

[0020] Figure 6 for Figure 3 Enlarged view of the structure of section C;

[0021] Figure 7 This is an exploded view of the hollow valve body and valve plate.

[0022] Numbering on the map:

[0023] 1. Outer tube; 2. Valve body; 3. Gas chamber; 4. First oil chamber; 5. Second oil chamber; 6. Hollow piston rod; 7. Connecting rod; 8. Sealing ring; 9. Pin; 10. Inclined surface; 11. Second seal; 12. Oil passage; 13. Sealing protrusion; 14. Hollow valve body; 15. Valve plate; 16. First seal; 17. Oil passage hole; 18. Protrusion; 19. Hollow groove; 20. Valve disc; 21. Slot; 22. Slot; 23. Limiting protrusion. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-7 As shown, this utility model provides a gas spring with a deceleration device, including an outer tube 1, a valve body 2, a hollow valve body 14, a hollow piston rod 6, and a control rod assembly. The valve body 2 is slidably installed inside the outer tube 1 and divides the inner cavity of the outer tube 1 into a gas chamber and an oil chamber. The hollow valve body 14 is slidably installed inside the outer tube 1 and divides the oil chamber into a first oil chamber 4 and a second oil chamber 5. The outer edges of the valve body 2 and the hollow valve body 14 are equipped with sealing rings 8, which are in close contact with the inner wall of the outer tube 1. One end of the hollow piston rod 6 is connected to the hollow valve body 14, and the other end of the hollow piston rod 6 slides through the outer tube 1. One end of the control rod assembly slides into the hollow valve body 14 and is used to open or close the hollow valve body 14. The other end of the control rod assembly extends out of the hollow piston rod 6.

[0026] It also includes a valve plate 15 fitted on a hollow valve body 14. The hollow valve body 14 is provided with a slot 21, and the inner wall of the valve plate 15 is formed with a protrusion 22. The valve plate 15 is embedded in the slot 21 through the protrusion 22 to achieve a tight connection with the hollow valve body 14.

[0027] The hollow valve body 14 is provided with at least one oil passage hole 17, which is connected to the second oil chamber 5. The valve plate 15 is provided with valve flaps 20 corresponding to the number of oil passage holes 17. The valve flaps 20 and the valve plate 15 are integral structures. The valve flaps 20 are used to block the oil passage holes 17, and the width of the valve flaps 20 is smaller than the diameter of the oil passage holes 17, so that the oil can pass through the oil passage holes 17 and reduce the speed of the oil flowing from the second oil chamber 5 to the first oil chamber 4, thereby reducing the speed at which the hollow piston rod 6 pops out. The valve plate 15 is provided with hollow grooves 19 corresponding to the number of valve flaps 20, so that the valve flaps 20 can move relative to the valve plate 15 under hydraulic action and expose the oil passage holes 17. When the oil passage holes 17 are exposed, the speed of the oil flowing from the first oil chamber 4 to the second oil chamber 5 can be increased, thereby reducing the resistance when compressing the hollow piston rod 6.

[0028] The control rod assembly includes a pin 9, a connecting rod 7, and a first seal 16. One end of the pin 9 is connected to the connecting rod 7. The first seal 16 is fitted at the end of the pin 9 near the connecting rod 7 and is press-fitted with the hollow valve body 14 to prevent oil from flowing along the pin 9 to the connecting rod 7. The hollow valve body 14 is equipped with a second seal 11. The other end of the pin 9 is provided with a sealing protrusion 13. The sealing protrusion 13 and the second seal 11 are press-fitted to form a sealing structure to close the hollow valve body 14. The connecting rod 7 is slidably installed in the hollow piston rod 6. Pushing the connecting rod 7 causes the sealing protrusion 13 to move away from the second seal 11. A gap is created between the sealing protrusion 13 and the second seal 11 to form an oil passage 12, so that the first oil chamber 4 and the second oil chamber 5 are interconnected.

[0029] Preferably, the inner wall of the hollow valve body 14 is formed with at least one limiting protrusion 23, which is used to restrict the movement of the second sealing member 11 and fix it in the hollow valve body 14. The connecting rod 7 is provided with a protrusion 18 for limiting, and the hollow piston rod 6 is provided with an inclined surface 10 that matches the protrusion 18, thereby limiting the stroke of the connecting rod 7.

[0030] Working principle:

[0031] In use, by pushing the connecting rod 7, the sealing protrusion 13 is moved away from the second seal 11, creating a gap between the sealing protrusion 13 and the second seal 11 to form an oil passage 12, thus connecting the first oil chamber 4 and the second oil chamber 5. Pushing the hollow piston rod 6 towards the gas chamber 3 compresses the gas in the gas chamber 3, causing the hollow valve body 14 to squeeze the oil in the first oil chamber 4 and allow it to flow from the oil passage 12 to the second oil chamber 5. As the oil flows from the oil passage 17 to the second oil chamber 5, it pushes up the valve disc 20, allowing the oil to flow smoothly from the first oil chamber 4 to the second oil chamber 5. Moving the connecting rod 7 moves the sealing protrusion 13 closer to the second seal 11. When the valve body 14 moves in the direction of 1, the sealing protrusion 13 and the second sealing element 11 are pressurized to form a sealing structure, and the hollow valve body 14 is closed. The oil and gas cannot move, the hollow piston rod 6 stops moving, and the connecting rod 7 is pushed again to make the sealing protrusion 13 and the second sealing element 11 create a gap to form the oil passage 12. The compressed gas pushes the valve body 2 to move, and the hollow valve body 14 squeezes the oil in the second oil chamber 5 and makes it flow from the oil passage 12 to the first oil chamber 4. During the process of the oil flowing from the oil passage hole 17 to the first oil chamber 4, the oil will press the valve disc 20 on the hollow valve body 14, thereby partially covering the oil passage hole 17. The oil can only flow to the first oil chamber 4 from the remaining uncovered part of the oil passage hole 17.

[0032] Compared to traditional technologies:

[0033] During compression, as the oil flows from the oil passage 17 to the second oil chamber 5, it pushes up the valve disc 20, allowing the oil to flow smoothly from the first oil chamber 4 to the second oil chamber 5, thus rapidly compressing the hollow piston rod 6. During resetting, the oil in the second oil chamber 5 can only flow from the remaining uncovered portion of the oil passage 17 to the first oil chamber 4, slowing down the flow rate. Therefore, the hollow piston rod 6 ejects more slowly, improving user comfort, reducing damage caused by rapid resetting, and extending the service life of the controllable gas spring.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A gas spring with a deceleration device, comprising an outer tube, a valve body, a hollow valve body, a hollow piston rod, and a control rod assembly, wherein the valve body is slidably installed inside the outer tube and divides the inner cavity of the outer tube into a gas chamber and an oil chamber; the hollow valve body is slidably installed inside the outer tube and divides the oil chamber into a first oil chamber and a second oil chamber; one end of the hollow piston rod is connected to the hollow valve body, and the other end of the hollow piston rod slides through the outer tube; one end of the control rod assembly slides into the hollow valve body and is used to open or close the hollow valve body; the other end of the control rod assembly extends beyond the hollow piston rod, characterized in that... It also includes a valve plate fitted on a hollow valve body, the hollow valve body being provided with at least one oil passage hole, the oil passage hole being interconnected with the second oil chamber, and the valve plate being provided with a valve flap corresponding to the number of oil passage holes, the valve flap being used to block the oil passage holes.

2. A gas spring with a speed reduction device according to claim 1, characterized in that, The hollow valve body is provided with a slot, and the inner wall of the valve plate is formed with a protrusion. The valve plate is embedded in the slot through the protrusion to achieve a tight connection with the hollow valve body.

3. A gas spring with a deceleration device according to claim 2, characterized in that, The valve plate is provided with hollowed-out grooves corresponding to the number of valve discs, so that the valve discs can move relative to the valve plate under hydraulic action and expose the oil passage hole.

4. A gas spring with a speed reduction device according to claim 1, characterized in that, The control rod assembly includes a push pin, a connecting rod, and a first seal. One end of the push pin is connected to the connecting rod. The first seal is fitted to the end of the push pin near the connecting rod and is interference-fitted with the hollow valve body to prevent oil from flowing along the push pin to the connecting rod. The hollow valve body is equipped with a second seal. The other end of the push pin is provided with a sealing protrusion. The sealing protrusion and the second seal are interference-fitted to form a sealing structure to close the hollow valve body. The connecting rod is slidably installed in the hollow piston rod. Pushing the connecting rod causes the sealing protrusion to move away from the second seal, creating a gap between the sealing protrusion and the second seal to form an oil passage, so that the first oil chamber and the second oil chamber are interconnected.

5. A gas spring with a speed reduction device according to claim 4, characterized in that, The inner wall of the hollow valve body is formed with at least one limiting protrusion, which is used to restrict the movement of the second seal and fix it in the hollow valve body.

6. A gas spring with a speed reduction device according to claim 4, characterized in that, The connecting rod is provided with a protrusion for limiting the position, and the hollow piston rod is provided with an inclined surface that matches the protrusion.

7. A gas spring with a speed reduction device according to claim 1, characterized in that, Both the valve body and the outer edge of the hollow valve body are fitted with sealing rings, which are in close contact with the inner wall of the outer tube.

8. A gas spring with a speed reduction device according to claim 1, characterized in that, The valve disc and valve plate are an integral structure, and the width of the valve disc is smaller than the diameter of the oil passage hole.

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