Gas spring with bidirectional independent speed regulation function
By using a movable sealing ring and connecting hole on the piston to switch the flow channel in the gas spring, independent speed control during compression and extension is achieved, solving the problem of the same speed in traditional gas springs and reducing structural complexity and maintenance costs.
Patent Information
- Application Number
- CN202520630969.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-04-03
AI Technical Summary
Traditional gas springs move at the same speed when compressed and extended, which cannot meet the needs of different working conditions. Moreover, existing solutions are complex in structure, prone to wear, and have high maintenance costs.
The gas spring design with bidirectional independent speed regulation allows for independent speed control during compression and extension by switching the flow path when the piston moves in different directions through the movable sealing ring and connecting hole on the piston. The structure is simple and the cost is low.
It achieves independent control of speed during compression and extension, has a simple structure, and reduces manufacturing and maintenance costs.
Smart Images
Figure CN223881605U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to gas spring technical field especially relates to a two -way independent speed regulation's gas spring. BACKGROUND
[0002] In the prior art, as a kind of widely used in furniture, automobile, medical equipment and other fields elastic element, its main function is to realize extension and compression movement by the compression and release of internal gas, to provide necessary support, buffering or positioning function for these devices.In traditional gas spring design, in order to realize the flow and regulation of gas, fixed speed limiting hole or throttle passage is usually arranged on the piston, to control the flow rate of gas between two chambers, so as to adjust the movement speed of gas spring.However, traditional gas spring can only realize the same flow passage system when compressing and extending, resulting in the same moving speed when compressing and extending, which cannot meet the use of different working conditions.Some existing gas springs realize flow passage switching by adding independent valve core, external jacks and other mechanical components.The scheme needs to integrate additional movable valve body on the piston or valve rod, and controls its action through external switch, although it can distinguish the flow passage path of compression and extension direction, but the structure is complex, and multiple components are matched, which is easy to cause sealing failure due to wear, increase maintenance cost. SUMMARY
[0003] The technical problem to be solved by the utility model lies in providing a two-way independent speed regulation's gas spring, which can realize independent control of the speed when compressing and extending, and has simple structure and low cost.
[0004] In order to solve the above technical problems, the utility model provides a two-way independent speed regulation's gas spring, which comprises an outer cylinder, a valve rod arranged in the outer cylinder, a piston arranged at one end of the valve rod and a speed regulation assembly arranged on the piston, a cavity is arranged in the outer cylinder, the piston divides the cavity into a first cavity and a second cavity, and the valve rod can drive the piston to move in the cavity.
[0005] The speed regulation assembly comprises a movable sealing ring and a movable groove arranged on the piston, the movable sealing ring is arranged in the movable groove, and the movable sealing ring can move in the movable groove.
[0006] A first communication hole and a second communication hole are arranged on the piston.
[0007] When the valve rod drives the piston to move towards the direction of compressing the first cavity, the movable sealing ring can move to one end of the movable groove and make the first cavity communicate with the second cavity through the first communication hole.
[0008] When the valve stem drives the piston to move towards the direction of extending the first cavity, the movable sealing ring can move to the other end of the movable groove and make the first cavity communicate with the second cavity through the second communication hole.
[0009] As an improvement of the above scheme, the piston comprises a piston body, a first ring part and a second ring part, the first ring part and the second ring part are arranged on the side wall of the piston body and protrude from the side wall of the piston body, the first ring part, the second ring part and the side wall of the piston body enclose the movable groove; when the movable sealing ring moves to the side of the first ring part, the first cavity can communicate with the second cavity through the second communication hole; when the movable sealing ring moves to the side of the second ring part, the first cavity can communicate with the second cavity through the first communication hole.
[0010] As an improvement of the above scheme, the outer ring of the movable sealing ring can be sealingly connected with the inner wall of the outer cylinder, and the inner diameter of the inner ring of the movable sealing ring is greater than the diameter of the side wall of the piston body.
[0011] As an improvement of the above scheme, the first ring part is arranged on one side of the piston body close to the first cavity, the second ring part is arranged on one side of the piston body close to the second cavity, and the outer side wall of the first ring part and the outer side wall of the second ring part can abut against the inner wall of the outer cylinder.
[0012] As an improvement of the above scheme, the first ring part is provided with a first communication groove, the first communication groove is recessed towards the radial direction of the first ring part and arranged on the side wall of the first ring part, and a first radial gap is formed between the groove bottom of the first communication groove and the inner wall of the outer cylinder; when the movable sealing ring abuts against the side wall of the first ring part, the side of the movable sealing ring can block the first radial gap; when the movable sealing ring abuts against the side wall of the second ring part, the first radial gap can communicate with the movable groove.
[0013] As an improvement of the above scheme, the piston further comprises a third ring part, the third ring part is arranged on the side wall of the piston body and protrudes from the side wall of the piston body, the third ring part is arranged on one side of the first ring part close to the first cavity, the side wall of the third ring part can sealingly abut against the inner wall of the outer cylinder, the first communication hole is arranged between the third ring part and the first ring part, one end of the first communication hole communicates with the first radial gap, and the other end of the first communication hole can communicate with the first cavity.
[0014] As the improvement of the above-mentioned scheme, the bidirectional independent speed-adjustable gas spring further comprises a valve core, the piston is internally provided with a movable cavity, the movable cavity is arranged along the axial direction of the outer cylinder, and the valve rod can drive the valve core to move in the movable cavity; one end of the movable cavity close to the first cavity is provided with a valve hole, the movable cavity is communicated with the first communication hole, when the valve core moves in the direction of compressing the first cavity and extends out of the valve hole, the valve hole can be communicated with the first cavity; and the end of the valve core can block the valve hole when moving in the direction of extending the first cavity.
[0015] As the improvement of the above-mentioned scheme, the third ring part is provided with a ring groove between the first ring part, the ring groove is recessed on the wall surface of the piston body, and the first communication hole is communicated between the movable cavity and the ring groove.
[0016] As the improvement of the above-mentioned scheme, the second ring part is provided with a second communication groove, the second communication groove is recessed on the side wall of the second ring part in the radial direction of the second ring part, one side of the second communication groove is communicated with the movable groove, the other side of the second communication groove is communicated with the second cavity, and the groove bottom of the second communication groove and the inner wall of the outer cylinder form a second radial gap; when the movable sealing ring abuts against the side wall of the second ring part, the first radial gap can be communicated with the second radial gap through the movable groove.
[0017] As the improvement of the above-mentioned scheme, the second communication hole is arranged on the second communication groove, one end of the second communication hole is communicated with the second radial gap, and the other end of the second communication hole is communicated with the valve hole.
[0018] The effective flow cross-sectional area of the second communication hole is smaller than the effective flow cross-sectional area of the second radial gap in the axial direction.
[0019] The effective flow cross-sectional area of the first communication hole is greater than the effective flow cross-sectional area of the second communication hole.
[0020] The utility model discloses, have following beneficial effect:
[0021] The utility model discloses a two -way independent speed regulation's gas spring is equipped with outer tube, valve stem, piston and speed regulation subassembly, the speed regulation subassembly includes movable sealing ring and is located the movable groove on the piston, movable sealing ring can move in movable groove, and first communication hole and second communication hole are equipped on the piston, when using, when valve stem drives the piston moves to the direction of compressing first cavity, movable sealing ring can move to one end of movable groove and make first cavity pass through first communication hole and second cavity intercommunication, form the passage when compression, when valve stem drives the piston moves to the direction of extending first cavity, movable sealing ring can move to the other end of movable groove and make first cavity pass through second communication hole and second cavity intercommunication, form the passage when extension. Two kinds of passages control respectively by movable sealing ring and first communication hole and movable sealing ring and second communication hole to different speed is obtained when moving in different directions to the realization, can realize the speed independent control of compression and extension, and only rely on movable sealing ring, first communication hole and second communication hole, simple structure, manufacturing cost and maintenance cost are low. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 It is the sectional structure schematic diagram of the utility model two -way independent speed regulation's gas spring;
[0023] Figure 2 It is the local structure schematic diagram of the utility model piston in outer tube;
[0024] Figure 3 It is the sectional structure schematic diagram of the utility model piston and valve core in first section;
[0025] Figure 4 It is the sectional structure schematic diagram of the utility model piston and valve core in second section;
[0026] Figure 5 It is the oil path schematic diagram of the utility model piston when moving to the direction of compressing first cavity;
[0027] Figure 6 It is the oil path schematic diagram of the utility model piston when moving to the direction of extending first cavity. DETAILED DESCRIPTION
[0028] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the utility model will be described further in detail below with the drawings. Only this declaration, the up, down, left, right, front, back, inside, outside etc. of the utility model appearing or about to appear in the text orientation word, only with the drawings of the utility model for the base, its is not the specific limitation of the utility model.
[0029] See Figure 1 ,Figure 2 、 Figure 5 and Figure 6 The utility model discloses a two -way independent speed regulation's gas spring, including the outer tube 1, be located in the valve rod 2 of outer tube 1, be located in the piston 3 of valve rod 2 one end and be located on the speed regulation subassembly 4 of piston 3, one end of valve rod 2 is located the outside of outer tube 1, with drive end connection, the other end of valve rod 2 with piston 3 connects, piston 3 is located the inside of outer tube 1, valve rod 2 can drive piston 3, be equipped with cavity 11 in outer tube 1, piston 3 divides the cavity 11 into first chamber 111 and second chamber 112, valve rod 2 can drive piston 3 moves in the cavity 11, thereby to the compression or stretch of first chamber 111, when compressing, the volume of first chamber 111 reduces, and oil liquid enters second chamber 112 through piston 3, when stretching, oil liquid flows back to first chamber 111 from second chamber 112 through piston 3.
[0030] Specifically, referring to Figure 2 , the speed regulation subassembly 4 includes a movable sealing ring 41 and a movable groove 42 provided on the piston 3, the movable sealing ring 41 is arranged in the movable groove 42, the movable sealing ring 41 can move in the movable groove 42, and a moving direction of the movable sealing ring 41 is a length direction of the cavity 11. The piston 3 is provided with a first communication hole 35 and a second communication hole 37, wherein the first communication hole 35 and the movable groove 42 can form a first flow channel 6 in cooperation, and the second communication hole 37 and the movable groove 42 can form a second flow channel 7 in cooperation, the first flow channel 6 and the second flow channel 7 can control a moving speed of the valve rod during compression and a moving speed of the valve rod during stretching respectively, during compression, the piston 3 moves towards a direction of compressing the first chamber 111, at this time, the movable groove 42 moves relative to the movable sealing ring 41, so that the movable sealing ring 41 moves to one end of the movable groove 42, and then the movable groove 42 drives the movable sealing ring 41 to move; during stretching, the piston 3 moves towards a direction of compressing the second chamber 112, at this time, the movable groove 42 moves relative to the movable sealing ring 41, so that the movable sealing ring 41 moves to the other end of the movable groove 42, and then the movable groove 42 drives the movable sealing ring 41 to move. The movement of the movable sealing ring 41 can open the first flow channel 6 or the second flow channel 7, so that oil liquid can enter the second chamber 112 from the first chamber 111 through the first communication hole 35, or enter the first chamber 111 from the second chamber 112 through the second communication hole 37, and the first flow channel 6 and the second flow channel 7 are independent of each other.
[0031] The utility model embodiment has the following beneficial effects:
[0032] The utility model discloses two -way independent speed regulation's gas spring has outer tube 1, valve stem 2, piston 3 and speed regulation subassembly 4, the speed regulation subassembly 4 includes movable sealing ring 41 and is located on the movable groove 42 of piston 3, movable sealing ring 41 can move in movable groove 42, and first communication hole 35 and second communication hole 37 are equipped on piston 3, when valve stem 2 drives piston 3 to move towards the direction of compressing first cavity 111 in use, movable sealing ring 41 can move to one end of movable groove 42 and make first cavity 111 pass through first communication hole 35 and second cavity 112 is connected, forms the passage when compressing, and when valve stem 2 drives piston 3 to move towards the direction of extending first cavity 111, movable sealing ring 41 can move to the other end of movable groove 42 and make first cavity 111 pass through second communication hole 37 and second cavity 112 is connected, forms the passage when extending. Two kinds of passages are controlled respectively by movable sealing ring 41 and first communication hole 35 and movable sealing ring 41 and second communication hole 37, to realize the different speed of obtaining when moving in different directions, can realize the speed independent control of compression and extension, and only rely on movable sealing ring 41, first communication hole 35 and second communication hole 37, simple structure, manufacturing cost and maintenance cost are low.
[0033] Specifically, referring to Figure 2 , the piston 3 includes a valve body 31, a first ring portion 32, and a second ring portion 33. The valve body 31 is a main shaft portion of the piston 3. The first ring portion 32 and the second ring portion 33 are arranged on the side wall of the valve body 31 and protrude from the side wall of the valve body 31, and are used to abut against the inner wall of the outer tube 1 to define the moving direction of the piston 3. The first ring portion 32, the second ring portion 33, and the side wall of the valve body 31 enclose the movable groove 42. The movable sealing ring 41 can move between the first ring portion 32 and the second ring portion 33. The side portion of the movable sealing ring 41 can abut against the side wall of the first ring portion 32 or the side wall of the second ring portion 33. Specifically, when the first cavity 111 is compressed, the movable sealing ring 41 can move relative to the piston 3 and abut against the side wall of the second ring portion 33. When the movable sealing ring 41 moves to the side portion of the second ring portion 33, the first cavity 111 can pass through the first communication hole 35 and be connected with the second cavity 112. When the first cavity 111 is extended, the movable sealing ring 41 can move relative to the piston 3 and abut against the side wall of the first ring portion 32. When the movable sealing ring 41 moves to the side portion of the first ring portion, the first cavity 111 can pass through the second communication hole 37 and be connected with the second cavity 112.
[0034] The outer ring of the movable sealing ring 41 can be sealingly connected with the inner wall of the outer cylinder 1, and the outer ring can form a blockage. The inner ring of the movable sealing ring 41 has a diameter greater than that of the side wall of the valve body 31, so that the inner ring does not form a blockage to the side wall of the valve body 31.
[0035] The first ring part 32 is arranged on one side of the valve body 31 close to the first cavity 111, and the second ring part 33 is arranged on one side of the valve body 31 close to the second cavity 112. The outer side wall of the first ring part 32 and the outer side wall of the second ring part 33 can abut against the inner wall of the outer cylinder 1 to limit the movement direction of the piston 3.
[0036] Further, referring to Figure 2 and Figure 3 , the first ring part 32 is provided with a first communication groove 321. The first communication groove 321 is arranged on the side wall of the first ring part 32 and recessed radially towards the first ring part 32. A first radial gap 322 is formed between the groove bottom of the first communication groove 321 and the inner wall of the outer cylinder 1. In the embodiment of the utility model, the number of the first communication grooves 321 is multiple, and the multiple first communication grooves 321 are uniformly distributed on the first ring part 32. The cross-sectional diameter of the movable sealing ring 41 is greater than the maximum width of the cross section of the first radial gap 322. Therefore, when the movable sealing ring 41 abuts against the side wall of the first ring part 32, the side part of the movable sealing ring 41 can block the first radial gap 322, thereby cutting off the first flow channel 6. When the movable sealing ring 41 abuts against the side wall of the second ring part 33, the first radial gap 322 can be communicated with the movable groove 42, and the first flow channel 6 is opened.
[0037] Referring to Figure 3 and Figure 4 , the piston 3 further comprises a third ring part 34. The third ring part 34 is arranged on the side wall of the valve body 31 and protrudes from the side wall of the valve body 31. The third ring part 34 is arranged on one side of the first ring part 32 close to the first cavity 111. The side wall of the third ring part 34 can sealingly abut against the inner wall of the outer cylinder 1. A first communication hole 35 is arranged between the third ring part 34 and the first ring part 32. One end of the first communication hole 35 is communicated with the first radial gap 322, and the other end of the first communication hole 35 can be communicated with the first cavity 111. The first communication hole 35, the first radial gap 322 and the movable groove 42 form part of the first flow channel 6.
[0038] The bidirectional independent speed regulating gas spring further comprises a valve core 5, the piston 3 is provided with a movable cavity 38, the movable cavity 38 is arranged along the axial direction of the outer cylinder 1, the valve rod 2 can drive the valve core 5 to move in the movable cavity 38, and the valve core 5 controls the opening and closing of the piston 3. Specifically, one end of the movable cavity 38 close to the first cavity 111 is provided with a valve hole 381, the movable cavity 38 is communicated with the first communication hole 35, when the valve core 5 moves towards the direction of compressing the first cavity 111 and extends from the valve hole 381, the valve hole 381 can be communicated with the first cavity 111, the oil in the first cavity 111 can enter the movable cavity 38 through the valve hole 381 and then be discharged from the first communication hole 35. When the end of the valve core 5 moves towards the direction of extending the first cavity 111, the valve hole 381 can be blocked, at this time, the oil in the first cavity 111 and the second cavity 112 no longer flows, supporting force is formed on the valve rod 2, thereby forming positioning.
[0039] The third ring part 34 and the first ring part 32 are provided with a ring groove 36, the ring groove 36 is recessed on the wall surface of the valve body 31, and the first communication hole 35 is communicated between the movable cavity 38 and the ring groove 36. The first communication hole 35 is arranged in the radial direction of the valve body 31, so as to fully utilize the space of the ring groove 36.
[0040] In order to enable the oil from the first communication hole 35 to enter the second cavity 112, the second ring part 33 is provided with a second communication groove 331, the second communication groove 331 is recessed on the side wall of the second ring part 33 in the radial direction of the second ring part 33, the bottom surface of the second communication groove 331 is an arc surface, one side of the second communication groove 331 is communicated with the movable groove 42, and the other side of the second communication groove 331 is communicated with the second cavity 112. The groove bottom of the second communication groove 331 and the inner wall of the outer cylinder 1 form a second radial gap 332. When the movable sealing ring 41 abuts against the side wall of the second ring part 33, the first radial gap 322 can be communicated with the second radial gap 332 through the movable groove 42.
[0041] Referring to Figure 5In use, the valve core 5 is pushed to open the valve hole 381 : when the piston 3 moves towards the direction of compressing the first cavity 111, the piston 3 moves, the movable sealing ring 41 moves to the side of the second ring part 33 in the movable groove 42, at this time the first radial gap 322 is opened, the oil in the first cavity 111 first enters the movable cavity 38 through the valve hole 381, and then enters the first communication hole 35 from the movable cavity 38. Since the first radial gap 322 is opened, the oil continues to enter the first radial gap 322 from the first communication hole 35, and then bypasses the inner ring of the movable sealing ring 41 from the bottom of the movable groove 42 into the second radial gap 332, and finally enters the second cavity 112. The valve hole 381, the movable cavity 38, the first communication hole 35, the first radial gap 322, the movable groove 42 and the second radial gap 332 form the first flow channel 6.
[0042] In addition, the second communication groove 331 is provided with a second communication hole 37, which penetrates the valve body 31 from the bottom surface of the second communication groove 331 towards the inside, one end of the second communication hole 37 communicates with the second radial gap 332, and the other end communicates with the valve hole 381.
[0043] Referring to Figure 6 In use, the valve core 5 is pushed to open the valve hole 381 : when the piston 3 moves towards the direction of compressing the first cavity 111, the piston 3 moves, the movable sealing ring 41 moves to the side of the second ring part 33 in the movable groove 42, at this time the first radial gap 322 is opened, the oil in the first cavity 111 first enters the movable cavity 38 through the valve hole 381, and then enters the first communication hole 35 from the movable cavity 38. Since the first radial gap 322 is opened, the oil continues to enter the first radial gap 322 from the first communication hole 35, and then bypasses the inner ring of the movable sealing ring 41 from the bottom of the movable groove 42 into the second radial gap 332, and finally enters the second cavity 112. The valve hole 381, the movable cavity 38, the first communication hole 35, the first radial gap 322, the movable groove 42 and the second radial gap 332 form the first flow channel 6.
[0044] Further, the effective flow area of the second communication hole 37 is smaller than the effective flow area of the second radial gap 332 in the axial direction. When the piston 3 moves in the direction of compressing the first cavity 111, the movable seal ring 41 moves to the side of the second ring part 33 in the movable groove 42, at this time, the first radial gap 322 is opened, the first radial gap 322 is communicated with the second radial gap 332 through the movable groove 42, at the same time, the second communication hole 37 is also communicated with the second radial gap 332, and because the effective flow area of the second communication hole 37 is smaller than the effective flow area of the second radial gap 332 in the axial direction, the resistance of the oil flowing through the second communication hole 37 is greater than the resistance of the oil flowing through the second radial gap 332, so that the oil finally flows from the second radial gap 332 into the second cavity 112, and the first flow channel 6 forms a passage.
[0045] In addition, the effective flow area of the first communication hole 35 is greater than the effective flow area of the second communication hole 37, so that when the first communication hole 35, the first radial gap 322, the movable groove 42 and the second radial gap 332 are communicated, the flow rate is greater than the flow rate when the valve hole 381, the movable cavity 38, the second communication hole 37 and the second radial gap 332 are communicated, so that when the piston 3 moves in the direction of compressing the first cavity 111, the moving speed is faster and the resistance is smaller, and a smaller pushing force can achieve the effect of compressing the valve rod faster, and when the piston 3 moves in the direction of extending the first cavity 111, the moving speed is relatively slow, and the effect of buffering extension is achieved.
[0046] The above is the preferred embodiment of the present application, it should be pointed out that for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements also regarded as the protection scope of the present application.
Claims
1. A bidirectional independently adjustable speed gas spring, characterized in that, The valve includes an outer cylinder, a valve stem arranged in the outer cylinder, a piston arranged at one end of the valve stem, and a speed regulating assembly arranged on the piston, wherein a cavity is arranged in the outer cylinder, the piston divides the cavity into a first chamber and a second chamber, and the valve stem can drive the piston to move in the cavity; The speed regulating assembly includes a movable sealing ring and a movable groove arranged on the piston, the movable sealing ring is arranged in the movable groove, and the movable sealing ring can move in the movable groove; The piston is provided with a first communication hole and a second communication hole; When the valve stem drives the piston to move towards the direction of compressing the first chamber, the movable sealing ring can move to one end of the movable groove and make the first chamber communicate with the second chamber through the first communication hole; When the valve stem drives the piston to move towards the direction of expanding the first chamber, the movable sealing ring can move to the other end of the movable groove and make the first chamber communicate with the second chamber through the second communication hole.
2. The bidirectional independently adjustable rate gas spring of claim 1, wherein, The piston includes a piston body, a first ring part and a second ring part, the first ring part and the second ring part are arranged on the side wall of the piston body and protrude from the side wall of the piston body, the first ring part, the second ring part and the side wall of the piston body enclose the movable groove, when the movable sealing ring moves to the side of the first ring part, the first chamber can communicate with the second chamber through the second communication hole, and when the movable sealing ring moves to the side of the second ring part, the first chamber can communicate with the second chamber through the first communication hole.
3. The bidirectional independently adjustable rate gas spring of claim 2, wherein, The outer ring of the movable sealing ring can be sealingly connected with the inner wall of the outer cylinder, and the inner diameter of the inner ring of the movable sealing ring is greater than the diameter of the side wall of the piston body.
4. The bidirectional independently adjustable rate gas spring of claim 2, wherein, The first ring part is arranged on one side of the piston body close to the first chamber, the second ring part is arranged on one side of the piston body close to the second chamber, and the outer side wall of the first ring part and the outer side wall of the second ring part can abut against the inner wall of the outer cylinder.
5. The bidirectional independently adjustable rate gas spring of claim 2, wherein, The first ring part is provided with a first communication groove, the first communication groove is recessed towards the radial direction of the first ring part and arranged on the side wall of the first ring part, a first radial gap is formed between the groove bottom of the first communication groove and the inner wall of the outer cylinder, when the movable sealing ring abuts against the side wall of the first ring part, the side of the movable sealing ring can block the first radial gap, and when the movable sealing ring abuts against the side wall of the second ring part, the first radial gap can communicate with the movable groove.
6. The bidirectional independently adjustable rate gas spring of claim 5, wherein, The piston further includes a third ring part, the third ring part is arranged on the side wall of the piston body and protrudes from the side wall of the piston body, the third ring part is arranged on one side of the first ring part close to the first chamber, the side wall of the third ring part can sealingly abut against the inner wall of the outer cylinder, the first communication hole is arranged between the third ring part and the first ring part, one end of the first communication hole communicates with the first radial gap, and the other end of the first communication hole can communicate with the first chamber.
7. The bidirectional independently adjustable rate gas spring of claim 6, wherein, The bidirectional independent speed regulating gas spring further comprises a valve core, the piston is provided with a movable cavity, the movable cavity is arranged along the axial direction of the outer cylinder, and the valve rod can drive the valve core to move in the movable cavity; One end of the movable cavity close to the first cavity is provided with a valve hole, the movable cavity is communicated with the first communication hole, when the valve core moves towards the direction of compressing the first cavity and extends from the valve hole, the valve hole can be communicated with the first cavity; when the end of the valve core moves towards the direction of extending the first cavity, the valve hole can be blocked.
8. The bidirectional independently adjustable rate gas spring of claim 7, wherein, The third ring part is provided with a ring groove between the first ring part, the ring groove is recessed on the wall surface of the piston body, and the first communication hole is communicated between the movable cavity and the ring groove.
9. The bidirectional independently adjustable rate gas spring of claim 7, wherein, The second ring part is provided with a second communication groove, the second communication groove is recessed on the side wall of the second ring part towards the radial direction of the second ring part, one side of the second communication groove is communicated with the movable groove, the other side of the second communication groove is communicated with the second cavity, and the groove bottom of the second communication groove and the inner wall of the outer cylinder form a second radial gap; when the movable sealing ring abuts against the side wall of the second ring part, the first radial gap can be communicated with the second radial gap through the movable groove.
10. The bidirectional independently adjustable rate gas spring of claim 9, wherein, The second communication hole is arranged on the second communication groove, one end of the second communication hole is communicated with the second radial gap, and the other end of the second communication hole is communicated with the valve hole; The effective flow area of the second communication hole is smaller than the effective flow area of the second radial gap in the axial direction; The effective flow area of the first communication hole is larger than the effective flow area of the second communication hole.