Temperature compensation gas spring

Abstract

The utility model discloses a temperature compensation gas spring, and relates to the technical field of gas springs. The gas spring comprises a piston rod assembly, a working cavity, a compensation cavity first part, a compensation cavity second part and a temperature compensation control valve assembly, wherein the piston rod assembly can reciprocate in the working cavity; the compensation cavity first part and the working cavity are arranged in the reciprocating motion direction, and the compensation cavity second part is arranged in the circumferential direction of the working cavity and communicates with the compensation cavity first part; the temperature compensation control valve assembly is located between the compensation cavity first part and the working cavity, and the temperature compensation control valve assembly controls communication between the compensation cavity first part and the working cavity. The low-temperature full-force-value compensation device can achieve the low-temperature full-force-value compensation effect on the basis that the space in the telescopic direction is limited and the stroke of the gas spring is not shortened, is effectively matched with an electric drive supporting system for use, and has the advantages of being easy to manufacture, low in cost and wider in application range.

Description

TECHNICAL FIELD

[0001] The utility model relates to a gas spring, concretely relates to a temperature compensation gas spring. BACKGROUND

[0002] In the related art, the gas spring with the temperature compensation control valve is a single-cylinder compensation structure, which comprises a piston rod assembly, a working cavity and a compensation cavity, the piston rod assembly is slidably arranged in the working cavity, the working cavity and the compensation cavity are arranged along the direction of reciprocating movement of the gas spring and are communicated or cut off between the working cavity and the compensation cavity through the temperature compensation control valve. The temperature compensation principle is that when the temperature changes, the valve is automatically opened or closed to allow or prevent the gas flow between the main gas cavity and the compensation cavity, thereby changing the effective volume of the system to offset the pressure change caused by the temperature.

[0003] Then, for the application occasion with limited space, especially axial space, long stroke and large low-temperature compensation force requirement, the above-mentioned gas spring with temperature compensation control valve can only provide partial force value compensation under low-temperature condition due to the limited volume of the compensation cavity, and the gas spring supporting force under low-temperature condition is still smaller than that under normal temperature, which leads to the difficulty in meeting the low-temperature supporting force requirement of the electric drive supporting system. At present, the electric drive supporting system still generally adopts the scheme of combining the coil spring with the ordinary gas spring, but there are problems of complex production process and high cost.

[0004] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model and should not be regarded as an acknowledgment or any form of suggestion that it forms prior art that is publicly known. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at solving the technical problems of the prior art, and provides a temperature compensation gas spring, which can realize low-temperature full force value compensation effect on the basis of limited space, especially axial space, without shortening the stroke of the gas spring, so as to effectively match the use of the electric drive supporting system, and has simple manufacturing, low cost and wider application range.

[0006] In order to solve the above technical problems, the utility model discloses a temperature compensation gas spring, which comprises a piston rod assembly, a working cavity, a compensation cavity first part, a compensation cavity second part and a temperature compensation control valve assembly, the piston rod assembly can reciprocate in the working cavity; the compensation cavity first part is arranged along the reciprocating direction with the working cavity, the compensation cavity second part is arranged on the circumference of the working cavity and is communicated with the compensation cavity first part; the temperature compensation control valve assembly is located between the compensation cavity first part and the working cavity, and the temperature compensation control valve assembly controls the communication between the compensation cavity first part and the working cavity.

[0007] Specifically, when the piston rod assembly is fully retracted, the gas pressure in the working chamber is equal to the gas pressure in the first compensation chamber and the second compensation chamber; when the piston rod assembly is fully extended, the gas pressure in the working chamber is less than the gas pressure in the first compensation chamber and the second compensation chamber.

[0008] In an embodiment, the second compensation chamber is an annular chamber, which is sleeved outside the working chamber.

[0009] In an embodiment, the second compensation chamber is always in communication with the first compensation chamber and has the same outer diameter as the first compensation chamber.

[0010] In an embodiment, the gas spring comprises an outer cylinder and an inner cylinder sleeved in the outer cylinder, one end of the outer cylinder is a closed end, the other end is an open end, an inner-outer cylinder fixed sealing assembly and a guide sealing assembly are installed on the open end of the outer cylinder, the guide sealing assembly is located on the side of the inner-outer cylinder fixed sealing assembly close to the open end of the outer cylinder; the temperature compensation control valve assembly is installed in the outer cylinder, both ends of the inner cylinder are fixed on the inner-outer cylinder fixed sealing assembly and the temperature compensation control valve assembly respectively; the piston rod assembly comprises a piston assembly and a piston rod, the piston assembly is arranged in the inner cylinder, the first end of the piston rod is located outside the outer cylinder, the second end of the piston rod is fixedly connected with the piston assembly after passing through the inner-outer cylinder fixed sealing assembly and the guide sealing assembly.

[0011] Specifically, the outer cylinder, the inner-outer cylinder fixed sealing assembly, the inner cylinder and the temperature compensation control valve assembly enclose to form the second compensation chamber; the outer cylinder and the temperature compensation control valve assembly enclose to form the first compensation chamber; the inner cylinder, the temperature compensation control valve assembly and the inner-outer cylinder fixed sealing assembly enclose to form the working chamber.

[0012] In an embodiment, the inner side of the outer cylinder is provided with a limiting rolling groove, which is used to limit the temperature compensation control valve assembly from one end.

[0013] In an embodiment, the temperature compensation control valve assembly comprises a valve shell body, a large sealing piece, a temperature control sheet and a small sealing piece.

[0014] The valve shell body is located in the inner cylinder and the outer wall of the valve shell body is gap-fitted with the inner wall of the inner cylinder.

[0015] The large sealing piece abuts between the outer wall of the valve shell body and the inner wall of the inner cylinder.

[0016] The valve shell body is connected with a limiting flange, and the outer diameter of the limiting flange is tightly matched with the inner wall of the outer cylinder barrel; the limiting flange is fixed or supported on the limiting rolling groove near the closed end of the outer cylinder barrel;

[0017] A communication channel is arranged on the limiting flange for communicating the first part of the compensation cavity and the second part of the compensation cavity;

[0018] The valve shell body is internally provided with a fluid channel, one end of the fluid channel is communicated with the working cavity, and the other end of the fluid channel is isolated from the first part of the compensation cavity through the small sealing piece and the temperature control piece;

[0019] The valve shell body is provided with a limiting buckle, the temperature control piece is connected to the valve shell body through the limiting buckle, and the small sealing piece is abutted between the valve shell body and the temperature control piece to form the sealing of the temperature compensation control valve assembly.

[0020] In an embodiment, an annular notch array is arranged on the outer edge of the limiting flange in the circumferential direction to form the communication channel for communicating the first part of the compensation cavity and the second part of the compensation cavity.

[0021] In an embodiment, the inner-outer cylinder fixed sealing assembly comprises a fixed block body, an outer cylinder barrel matching sealing piece and an inner cylinder barrel matching sealing piece, the outer wall of the fixed block body is fixedly connected with the inner wall of the outer cylinder barrel through a riveting structure, the fixed block body is provided with an inner cylinder barrel limiting groove on the side near the closed end of the outer cylinder barrel, the groove bottom of the inner cylinder barrel limiting groove is abutted with the outer wall of the inner cylinder barrel, and the groove wall of the inner cylinder barrel limiting groove is tightly matched with the outer wall of the inner cylinder barrel; the outer cylinder barrel matching sealing piece is abutted between the outer wall of the fixed block body and the inner wall of the outer cylinder barrel; the inner cylinder barrel matching sealing piece is abutted between the groove wall of the inner cylinder barrel limiting groove and the outer wall of the inner cylinder barrel; and a piston rod through hole is arranged on the fixed block body for the piston rod to pass through.

[0022] Beneficial effects:

[0023] 1. The traditional temperature compensation gas spring is a single cylinder compensation structure, and for the application occasions with long stroke and large low-temperature compensation force requirement, the traditional temperature compensation gas spring cannot meet the low-temperature support function; the application adds the second part of the compensation cavity in the circumferential direction of the working cavity, can meet the stroke design requirement under the same installation space, provide low-temperature compensation force under the same installation stroke condition, realize larger compensation force, ensure that the low-temperature support effect is consistent with the normal temperature state, and avoid insufficient low-temperature support force.

[0024] 2. Traditional temperature-compensated gas springs have limited compensation force and cannot achieve full-value compensation under low-temperature conditions, resulting in insufficient low-temperature support force for matching electric drive support systems. Currently, electric drive support systems still use matching coil springs and ordinary gas springs for installation, which involves complex production processes and high costs. This utility model of low-temperature compensation gas spring can achieve full-value compensation at low temperatures, ensuring that the support force at low temperatures is consistent with that at normal temperatures. It can be effectively matched with electric drive support systems, is simple to manufacture, has low cost, and has a wider range of applications.

[0025] 3. The temperature compensation control valve assembly adopts an integrated design. The temperature control plate is limited by the limit buckle set on the valve body, and the temperature control plate and the valve body are sealed by a small sealing element. The inner and outer cylinders are connected by the valve body and the limit flange. The valve body and the limit flange are formed as one piece, which effectively avoids the assembly process difficulties caused by the assembly of multiple parts, as well as the problem of sealing failure due to loose fit. Attached Figure Description

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0027] Figure 1 A schematic diagram of the structure of a temperature-compensating gas spring provided by this utility model. Figure 1 ;

[0028] Figure 2 A schematic diagram of the assembly structure of the temperature compensation control valve, outer cylinder and inner cylinder provided by this utility model;

[0029] Figure 3 A cross-sectional view of the temperature compensation control valve provided by this utility model;

[0030] Figure 4 A schematic diagram of the assembly structure between the guide sealing assembly, the inner and outer cylinder fixing sealing assembly, the outer cylinder, the inner cylinder, and the piston rod provided by this utility model.

[0031] Figure 5 for Figure 1 The diagram shows the structure of the temperature compensation gas spring. Figure 2 .

[0032] The accompanying figure labels are explained as follows:

[0033] 1, piston rod assembly; 2, working chamber; 3, compensation chamber first part; 4, compensation chamber second part; 5, temperature compensation control valve assembly; 6, outer cylinder; 7, inner cylinder; 8, inner and outer cylinder fixed sealing assembly; 9, guide sealing assembly; 10, joint; 11, piston; 12, piston rod; 51, valve shell body; 52, large sealing piece; 53, temperature control piece; 54, small sealing piece; 55, reinforcing gasket; 56, limiting flange; 57, communication channel; 61, closed end; 62, open end; 63, limiting groove; 64, folding part; 65, protruding structure; 81, fixed block main body; 82, outer cylinder matching sealing piece; 83, inner cylinder matching sealing piece; 811, inner cylinder limiting groove; 812, piston rod through hole; 813, spot riveting fixing groove. DETAILED DESCRIPTION

[0034] In the related art, the gas spring with the temperature compensation control valve is a single-cylinder compensation structure, which cannot realize full force value compensation under low temperature conditions, and cannot adapt to application occasions with limited space, long stroke and large low temperature compensation force requirement

[0035] Referring to Figures 1 to 4 The temperature compensation gas spring provided by the utility model has the advantages that the compensation chamber second part 4 is additionally arranged on the periphery of the working chamber 2, the low temperature full force value compensation effect is realized on the basis that the space in the extension and retraction direction is limited and the gas spring stroke is not shortened, the support force in the low temperature state is ensured to be consistent with that in the normal temperature state, the electric drive support system is effectively matched, the temperature compensation gas spring is simple to manufacture, low in cost, and wider in application range.

[0036] Specifically, the working chamber 2 is filled with high-pressure gas, the piston rod assembly 1 reciprocates in the cavity, and the opening and closing door state support force is provided. The compensation chamber first part 3 and the compensation chamber second part 4 are also filled with high-pressure gas, and are used for providing the low temperature compensation force. The gas pressure of the compensation chamber first part 3 and the compensation chamber second part 4 is not lower than the working chamber gas pressure, and the low temperature compensation force is provided.

[0037] In an embodiment, the compensation chamber second part 4 is an annular chamber, which is sleeved on the outer side of the working chamber 2.

[0038] More specifically, referring to

[0039] More specifically, referring to Figure 1The second part 4 of the compensation cavity is always in communication with the first part 3 of the compensation cavity and has the same outer diameter as the first part 3 of the compensation cavity.

[0040] In an embodiment, referring to Figure 1 The piston rod assembly 1 comprises a piston assembly 11 and a piston rod 12, the piston assembly 11 being located in the working cavity 2. The first end of the piston rod 12 is located outside the working cavity 2, and the second end of the piston rod 12 is located in the working cavity 2 and connected with the piston assembly 11.

[0041] In an embodiment, referring to Figure 1 The gas spring comprises an outer cylinder 6 and an inner cylinder 7 sleeved in the outer cylinder 6. One end of the outer cylinder 6 is a closed end 61, and the other end is an open end 62. The open end 62 of the outer cylinder 6 is provided with an inner-outer cylinder fixed sealing assembly 8 and a guide sealing assembly 9. The guide sealing assembly 9 is located on the side of the inner-outer cylinder fixed sealing assembly 8 close to the open end 62 of the outer cylinder 6. A temperature compensation control valve assembly 5 is installed in the outer cylinder 6. The two ends of the inner cylinder 7 are fixed on the inner-outer cylinder fixed sealing assembly 8 and the temperature compensation control valve assembly 5, respectively. A piston assembly 11 is arranged in the inner cylinder 7. The first end of the piston rod 12 is located outside the outer cylinder 6, and the second end of the piston rod 12 is fixedly connected with the piston assembly 11 after passing through the inner-outer cylinder fixed sealing assembly 8 and the guide sealing assembly 9.

[0042] Specifically, referring to Figure 1 The outer cylinder 6, the inner-outer cylinder fixed sealing assembly 8, the inner cylinder 7, and the temperature compensation control valve assembly 5 form the second part 4 of the compensation cavity. The outer cylinder 6 and the temperature compensation control valve assembly 5 form the first part 3 of the compensation cavity. The inner cylinder 7, the temperature compensation control valve assembly 5, and the inner-outer cylinder fixed sealing assembly 8 form the working cavity 2.

[0043] In an embodiment, referring to Figure 1 The inner side of the outer cylinder 6 is provided with a limiting rolling groove 63 for limiting the temperature compensation control valve assembly 5 from one end. The position of the limiting rolling groove 63 is determined based on the product stroke of the gas spring.

[0044] In an embodiment, referring to Figure 1 The open end 62 of the outer cylinder 6 is provided with a folding part 64,

[0045] Referring to Figure 1 When installed, the temperature compensation control valve assembly 5, the inner cylinder 7, the piston rod assembly 1, the inner-outer cylinder fixed sealing assembly 8, and the guide sealing assembly 9 are loaded into the outer cylinder 6 from the open end 62 of the outer cylinder 6, and then the open end 62 of the outer cylinder 6 is bent inward to form the folding part 64. The folding part 64 limits the guide sealing assembly 9 to form effective sealing and guiding.

[0046] Specifically, when the piston rod assembly 1 is fully pressed in, the gas pressure in the working chamber 2 is equal to the gas pressure in the compensation chamber first part 3 and the compensation chamber second part 4; when the piston rod assembly 1 is fully extended, the gas pressure in the working chamber 2 is less than the gas pressure in the compensation chamber first part 3 and the compensation chamber second part 4.

[0047] In an embodiment, referring to Figure 2 and Figure 3 , the temperature compensation control valve assembly 5 comprises a valve shell body 51, a large sealing member 52, a temperature control sheet 53, a small sealing member 54 and a reinforcing gasket 55.

[0048] Referring to Figure 2 , the valve shell body 51 is located in the inner cylinder barrel 7 and the outer wall of the valve shell body 51 is gap-fitted with the inner wall of the inner cylinder barrel 7. The large sealing member 52 is arranged between the outer wall of the valve shell body 51 and the inner wall of the inner cylinder barrel 7. Specifically, the large sealing member 52 can be a sealing ring.

[0049] Referring to Figure 2 and Figure 3 , the valve shell body 51 is connected with a limiting flange 56, the outer diameter of the limiting flange 56 is tightly fitted with the inner wall of the outer cylinder barrel 6, realizing radial limiting and effectively avoiding the radial wobble amount between the inner cylinder barrel 7 and the temperature compensation control valve assembly 5. The side of the limiting flange 56 close to the closed end 61 of the outer cylinder barrel 6 is fixed or supported in the limiting rolling groove 63, realizing axial limiting of one end. Preferably, referring to Figure 3 , the limiting flange 56 is integrally formed with the valve shell body 51. The limiting flange 56 is provided with a communication channel 57 for communicating the compensation chamber first part 3 and the compensation chamber second part 4. The valve shell body 51 is provided with a fluid channel 511, one end of the fluid channel 511 is communicated with the working chamber 2, the other end of the fluid channel 511 is isolated from the compensation chamber first part 3 through the small sealing member 54 and the temperature control sheet 53; the valve shell body 51 is provided with a limiting buckle 512, the temperature control sheet 53 is buckled and connected to the valve shell body 51 through the limiting buckle 512, and the small sealing member 54 is abutted between the valve shell body 51 and the temperature control sheet 53, forming the sealing of the temperature compensation control valve assembly 5.

[0050] When the temperature of the temperature control sheet 53 decreases to a deformation threshold, the temperature control sheet 53 deforms, and the deformed temperature control sheet 53 is separated from the small sealing member 54, so that the fluid channel 511 is communicated with the compensation chamber first part 3.

[0051] Specifically, the valve shell body 51 is provided with a boss 513, and the small sealing member 54 is sleeved on the boss 513 and tightly connected with the boss 513.

[0052] Further, in order to avoid deformation of the limiting flange, the temperature compensation control valve assembly 5 further comprises a reinforcing gasket 55, which is sleeved on the outer periphery of the valve shell body 51, and one side end face of the reinforcing gasket 55 is connected with the one side end face of the inner cylinder 7 close to the first part of the compensation cavity, and the other side end face of the reinforcing gasket 55 is completely attached to the limiting flange 56.

[0053] In this embodiment, the reinforcing gasket 55 is arranged to enable the limiting flange 56 to bear the high-pressure gas load in the compensation cavity, and at the same time, the limiting flange 56 plays a limiting role together with the limiting flange 56, thereby avoiding displacement of the temperature compensation control valve assembly 5.

[0054] Referring to Figure 2 The reinforcing gasket 55 is made of hard metal material to avoid the valve shell from creeping towards the inner cylinder 7 under the action of the gas pressure in the first part 3 and the second part 4 of the compensation cavity during long-term storage of the product.

[0055] In a specific embodiment, referring to Figure 1 The limiting flange 56 is arranged on one side of the valve shell body 51 close to the closed end 61 of the outer cylinder 6.

[0056] In a specific embodiment, referring to Figure 2 The outer edge of the limiting flange 56 is provided with an array of annular notches in the circumferential direction, forming a communication channel 57 that communicates the first part 3 and the second part 4 of the compensation cavity. The communication channel 57 looks like a flower in overall from the side.

[0057] The working principle of the temperature compensation control valve assembly 5 is as follows:

[0058] Since the first part 3 and the second part 4 of the compensation cavity are always in communication, for the sake of description, the cavity formed by the first part of the compensation cavity and the second part of the compensation cavity together will be referred to as the compensation cavity.

[0059] In the normal temperature state, the temperature control sheet 53 forms a sealing fit with the small sealing member 54, the temperature compensation control valve assembly 5 is closed, the large sealing member 52 forms a sealing fit with the inner cylinder 7, and the two sealing fits form an isolation between the compensation cavity and the working cavity, realizing no compensation force in the normal temperature state.

[0060] In the low-temperature state, the temperature control sheet 53 is deformed by contraction, and the small sealing member 54 is not sealed with the temperature control sheet 53, the temperature compensation control valve assembly 5 is opened, the working cavity 2 and the compensation cavity are communicated, the high-pressure gas in the compensation cavity participates in the work, the product stiffness is reduced, the gas spring support force is increased, and the temperature compensation is realized.

[0061] In an embodiment, referring to Figure 4The inner-outer cylinder fixed sealing assembly 8 comprises a fixed block main body 81, an outer cylinder barrel matching sealing element 82 and an inner cylinder barrel matching sealing element 83. The outer wall of the fixed block main body 81 is fixedly connected with the inner wall of the outer cylinder barrel 6 through a riveting structure. The side of the fixed block main body 81 close to the closed end 61 of the outer cylinder barrel 6 is provided with an inner cylinder barrel limiting groove 811, the groove bottom of the inner cylinder barrel limiting groove 811 abuts against the outer wall of the inner cylinder barrel 7, and the inner cylinder barrel limiting groove 811 is used for limiting the inner cylinder barrel 7. The groove wall of the inner cylinder barrel limiting groove 811 is tightly matched with the outer wall of the inner cylinder barrel 7. The outer cylinder barrel matching sealing element 82 abuts against between the outer wall of the fixed block main body 81 and the inner wall of the outer cylinder barrel 6, so as to realize the sealed connection between the fixed block main body 81 and the inner cylinder barrel 7. The inner cylinder barrel matching sealing element 83 abuts against between the groove wall of the inner cylinder barrel limiting groove 811 and the outer wall of the inner cylinder barrel 7. The fixed block main body 81 is provided with a piston rod through hole 812 for the piston rod 12 to pass through.

[0062] Specifically, referring to Figure 4 A point riveting fixing groove 813 is formed in the outer wall of the fixed block main body 81. When riveting, the inner wall of the outer cylinder barrel 6 forms an inward protruding structure 65 which is embedded in the point riveting fixing groove 813, so as to realize the axial limiting between the outer cylinder barrel 6 and the fixed block main body 81.

[0063] In the embodiment, since the inner cylinder barrel limiting groove 811 is formed in the fixed block main body 81, the concentricity between the inner cylinder barrel 7 and the outer cylinder barrel 6 is more easily ensured through the concentricity between the inner cylinder barrel limiting groove 811 and the outer wall of the fixed block main body 81, and the radial swing of the inner cylinder barrel 7 is effectively avoided.

[0064] The inner cylinder barrel matching sealing element 83 and the outer cylinder barrel matching sealing element 82 jointly ensure the separation between the working cavity 2 and the first part 3 of the compensation cavity.

[0065] In an embodiment, referring to Figure 1 The gas spring further comprises a joint 10, and the closed end 61 of the outer cylinder barrel 6 and one end of the piston rod 12 located outside the working cavity 2 are respectively connected with the joint 10.

[0066] In the application, the guide sealing assembly 9 can adopt the existing structure and is not the main improvement point of the application, and thus is not described herein.

[0067] The temperature compensation principle of the application will be described below.

[0068] Referring to Figure 5 The volume of the working cavity 2 is V, the volume of the first part of the compensation cavity is V1, the volume of the second part of the compensation cavity is V2, and the volume of the stroke section piston rod is V p The product stroke of the gas spring is s.

[0069] Normal temperature state product stiffness = V / (V-Vp )

[0070] Low temperature state product stiffness = (V+V1+V2) / (V+V1+V2-V p ) = 1+V p / (V+V1+V2-V p )

[0071] It can be known that, compared with the gas spring with only the first part of the compensation cavity, the gas spring has smaller stiffness in the low temperature state. According to the principle that the greater the product stiffness is, the smaller the supporting force is, it can be known that the gas spring has greater supporting force in the low temperature state.

[0072] The traditional temperature compensation gas spring is a single cylinder compensation structure, and for the application occasions with long stroke and large low temperature compensation force, the traditional temperature compensation gas spring cannot meet the low temperature supporting function. However, the second part of the compensation cavity is additionally arranged on the circumference of the working cavity, so that the stroke design requirement can be met and the low temperature compensation force can be provided under the same installation space, the greater compensation force can be realized under the same installation stroke condition, the low temperature supporting effect is consistent with the normal temperature state, and the low temperature supporting force is avoided.

[0073] The utility model provides a kind of temperature compensation gas spring's thought and method, the method and approach of specifically realizing this technical scheme are many, above-mentioned is only preferred implementation mode of the utility model, it should be pointed out, for the ordinary skilled in the art of this technology, under the premise of not departing from the principle of the utility model, still can make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model. The components not specified in the embodiment can be realized by prior art.

Claims

1. A temperature-compensating gas spring, characterized in that, The device includes a piston rod assembly (1), a working chamber (2), a first part of a compensation chamber (3), a second part of a compensation chamber (4), and a temperature compensation control valve assembly (5). The piston rod assembly (1) is capable of reciprocating within the working chamber (2). The first part of the compensation chamber (3) is disposed along the reciprocating direction with the working chamber (2). The second part of the compensation chamber (4) is disposed in the circumferential direction of the working chamber (2) and communicates with the first part of the compensation chamber (3). The temperature compensation control valve assembly (5) is located between the first part of the compensation chamber (3) and the working chamber (2), and controls the communication between the first part of the compensation chamber (3) and the working chamber (2).

2. The temperature-compensating gas spring according to claim 1, characterized in that, When the piston rod assembly (1) is fully depressed, the gas pressure in the working chamber (2) is equal to the gas pressure in the first part (3) and the second part (4) of the compensation chamber; when the piston rod assembly (1) is extended, the gas pressure in the working chamber (2) is less than the gas pressure in the first part (3) and the second part (4) of the compensation chamber.

3. The temperature-compensating gas spring according to claim 1, characterized in that, The second part (4) of the compensation cavity is an annular cavity, which is sleeved on the outside of the working cavity (2).

4. The temperature-compensating gas spring according to claim 3, characterized in that, The second part (4) of the compensation cavity is always connected to the first part (3) of the compensation cavity and the two have the same outer diameter.

5. The temperature-compensating gas spring according to any one of claims 1 to 4, characterized in that, The system includes an outer cylinder (6) and an inner cylinder (7) fitted inside the outer cylinder (6). One end of the outer cylinder (6) is a closed end (61), and the other end is an open end (62). An inner and outer cylinder fixing sealing assembly (8) and a guide sealing assembly (9) are installed on the open end (62) of the outer cylinder (6). The guide sealing assembly (9) is located on the side of the inner and outer cylinder fixing sealing assembly (8) near the open end (62) of the outer cylinder (6). The temperature compensation control valve assembly (5) is installed inside the outer cylinder (6). The two ends of the inner cylinder (7) are respectively fixed to the inner and outer cylinder fixing sealing assembly (8) and the temperature compensation control valve assembly (5); the piston rod assembly (1) includes a piston assembly (11) and a piston rod (12). The piston assembly (11) is disposed inside the inner cylinder (7). The first end of the piston rod (12) is located outside the outer cylinder (6). The second end of the piston rod (12) passes through the inner and outer cylinder fixing sealing assembly (8) and the guide sealing assembly (9) and is fixedly connected to the piston assembly (11).

6. The temperature-compensating gas spring according to claim 5, characterized in that, The outer cylinder (6), the inner and outer cylinder fixing and sealing assembly (8), the inner cylinder (7), and the temperature compensation control valve assembly (5) enclose to form the second part (4) of the compensation cavity; the outer cylinder (6) and the temperature compensation control valve assembly (5) enclose to form the first part (3) of the compensation cavity; the inner cylinder (7), the temperature compensation control valve assembly (5), and the inner and outer cylinder fixing and sealing assembly (8) enclose to form the working cavity (2).

7. The temperature-compensating gas spring according to claim 5, characterized in that, The inner side of the outer cylinder (6) is provided with a limiting groove (63), which is used to limit the temperature compensation control valve assembly (5) from one end.

8. The temperature-compensating gas spring according to claim 7, characterized in that, The temperature compensation control valve assembly (5) includes a valve body (51), a large seal (52), a temperature control plate (53), and a small seal (54); The valve body (51) is located inside the inner cylinder (7) and there is a clearance fit between the outer wall of the valve body (51) and the inner wall of the inner cylinder (7); The large sealing element (52) abuts against the outer wall of the valve body (51) and the inner wall of the inner cylinder (7); The valve body (51) is connected to a limiting flange (56), the outer diameter of which is in close fit with the inner wall of the outer cylinder (6); the limiting flange (56) is fixed or supported by the limiting groove (63) on the side near the closed end (61) of the outer cylinder (6). The limiting flange (56) is provided with a communication channel (57) for connecting the first part (3) of the compensation cavity and the second part (4) of the compensation cavity; The valve body (51) has a fluid channel (511) inside. One end of the fluid channel (511) is connected to the working chamber (2), and the other end of the fluid channel (511) is isolated from the first part (3) of the compensation chamber through the small seal (54) and the temperature control plate (53). The valve body (51) is provided with a limit buckle (512), the temperature control plate (53) is connected to the valve body (51) by the limit buckle (512), and the small sealing element (54) abuts between the valve body (51) and the temperature control plate (53) to form a seal of the temperature compensation control valve assembly (5).

9. The temperature-compensating gas spring according to claim 8, characterized in that, The outer edge of the limiting flange (56) is provided with an array of annular notches along the circumferential direction, forming a connecting channel (57) connecting the first part (3) of the compensation cavity and the second part (4) of the compensation cavity.

10. The temperature-compensating gas spring according to claim 5, characterized in that, The inner and outer cylinder fixing and sealing assembly (8) includes a fixing block body (81), an outer cylinder matching seal (82), and an inner cylinder matching seal (83). The outer wall of the fixing block body (81) and the inner wall of the outer cylinder (6) are fixedly connected by a riveting structure. An inner cylinder limiting groove (811) is provided on the side of the fixing block body (81) near the closed end (61) of the outer cylinder (6). The bottom of the inner cylinder limiting groove (811) abuts against the inner cylinder (7), and the groove wall of the inner cylinder limiting groove (811) is tightly fitted with the outer wall of the inner cylinder (7). The outer cylinder matching seal (82) abuts against the outer wall of the fixing block body (81) and the inner wall of the outer cylinder (6). The inner cylinder matching seal (83) abuts against the groove wall of the inner cylinder limiting groove (811) and the outer wall of the inner cylinder (7). The fixing block body (81) has a piston rod through hole (812) for the piston rod (12) to pass through.

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