Gas spring with temperature compensation function

Abstract

The utility model relates to the technical field of gas springs, in particular to a gas spring with a temperature compensation function. A temperature compensation assembly is further arranged in a steel pipe assembly of the gas spring with the temperature compensation function and comprises a sleeve, a temperature sensitive wax layer attached to one end of the sleeve and a compensation cavity are arranged in the sleeve, a telescopic rod is further arranged in the sleeve and located between the temperature sensitive wax layer and the compensation cavity, one end of the telescopic rod extends out of the sleeve, and the other end of the telescopic rod extends out of the sleeve. The distance from the end, extending out of the sleeve, of the telescopic rod to the end of one end in the steel pipe assembly is larger than the extending distance of the telescopic rod under the thermal expansion and cold contraction action of the temperature sensitive wax layer, and a right ventilation opening and a left ventilation opening are designed in the left side and the right side of the sleeve. Temperature-sensitive wax in the temperature compensation assembly has the characteristic of thermal expansion and cold contraction, so that the extension size of the telescopic rod is automatically adjusted by adapting to different temperatures, and finally the purpose of maintaining the output force value of the gas spring to be relatively stable is achieved.

Description

Technical Field

[0001] The utility model relates to a gas spring, in particular to a gas spring with a temperature compensation function. Background Art

[0002] An ordinary gas spring is a gas strut that can provide force support in the extension direction. A piston rod assembly is installed inside it. The piston rod assembly divides the steel tube into two cavities. The high-pressure gas in the two cavities can flow, so the pressure is the same. The piston rod assemblies in the left and right cavities occupy different areas, so a pressure difference is generated, thereby providing support force for outward extension.

[0003] The patent number is 202121594140.8, and the name of the invention is a new type of gas spring with a temperature compensation control valve. It proposes to set up a high-pressure chamber for gas compensation. The design is controlled by installing a temperature compensation control valve for opening and closing. Among them, the temperature control plate component, when the ambient temperature is low, the temperature control valve opens, and the gas in the high-pressure chamber flows into the low-pressure chamber, thereby compensating for the pressure in the low-pressure chamber, and then maintaining the stability of the gas spring force. However, when the temperature is high, the temperature control valve is closed. At this time, the high-pressure chamber does not work, and the gas in the low-pressure chamber expands due to the increase in temperature, causing the gas spring force to increase. Therefore, it can be seen that this patent can only solve the disadvantage of insufficient gas spring force in winter when the temperature is low, but cannot solve the disadvantage of excessive force in summer when the temperature is high.

[0004] Since gas has strong characteristics of thermal expansion and contraction, the supporting force provided by gas springs is very different in the hot summer and the cold winter. Even in extreme winter, gas springs will have the disadvantage of insufficient opening force, which seriously reduces the user experience and comfort. At present, there is no effective solution to this disadvantage of gas springs. Utility Model Content

[0005] The utility model aims to solve the above defects and provides a gas spring with temperature compensation function.

[0006] In order to overcome the defects existing in the background technology, the technical solution adopted by the utility model to solve its technical problems is: this gas spring with temperature compensation function includes a tube end ball socket, a steel tube assembly and a rod end ball socket, a piston rod is provided in the steel tube assembly, one end of which is connected to the steel tube assembly and the other end extends to the outside of the steel tube assembly, the tube end ball socket is installed at the end of one end of the steel tube assembly, and the rod end ball socket is installed at the other end of the piston rod, and a temperature compensation assembly is also provided in the steel tube assembly, the temperature compensation assembly includes a sleeve, a temperature sensitive wax layer and a compensation cavity are provided in the sleeve that fits one end of the sleeve, a telescopic rod is also provided in the sleeve, the telescopic rod is located between the temperature sensitive wax layer and the compensation cavity, and one end of the telescopic rod extends out of the sleeve, the distance from the end of the telescopic rod extending out of the sleeve to the end of one end in the steel tube assembly is greater than the distance the telescopic rod extends under the action of thermal expansion and contraction of the temperature sensitive wax layer, and right-side air vents and left-side air vents are designed on the left and right sides of the sleeve.

[0007] According to another embodiment of the utility model, the telescopic rod is further T-shaped and installed at the temperature sensitive wax layer.

[0008] According to another embodiment of the utility model, the steel pipe assembly further includes a first rolling groove and a second rolling groove for constraining and fixing the temperature compensation assembly, and the temperature compensation assembly is located between the first rolling groove and the second rolling groove.

[0009] According to another embodiment of the utility model, one end of the piston rod is further provided with a riveted piston assembly, and the piston rod is also provided with a sealing assembly, and the sealing assembly is located at the end of the other end of the steel pipe assembly.

[0010] According to another embodiment of the utility model, the steel pipe assembly is further provided with a third rolling groove for constraining and fixing the sealing assembly.

[0011] According to another embodiment of the utility model, the right side of the sleeve is further provided with a right vent, and the left side of the sleeve is provided with a left vent.

[0012] The beneficial effects of the utility model are as follows: the gas spring with temperature compensation function is installed and fixed with a temperature compensation component inside a steel pipe. The temperature-sensitive wax in the temperature compensation component has the characteristics of thermal expansion and contraction, so as to control the extension volume of the telescopic rod according to different temperatures. When the temperature is low, the temperature-sensitive wax contracts, the telescopic rod extends, and the cavity volume in the steel pipe decreases, thereby increasing the cavity pressure; when the temperature is high, the temperature-sensitive wax expands, the telescopic rod contracts, and the cavity volume in the steel pipe increases, thereby reducing the cavity pressure, and finally achieving the purpose of maintaining the gas spring output force value relatively stable. The temperature compensation component of the present invention can be designed to have different lengths, different diameters and other specifications, and can be well matched for different types of gas springs. In addition, the telescopic rod can also be designed as a hollow tube, so as to fill more temperature-sensitive wax and further increase the temperature compensation space. The present invention has high versatility and great engineering promotion value, and can solve the application problems that are common at this stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 yes Figure 1 AA direction section diagram;

[0016] Figure 3 It is a schematic diagram of the structure of the temperature compensation component;

[0017] Figure 4 This is a schematic diagram of the BB section of the temperature compensation component;

[0018] Figure 5 It is a schematic diagram of the area of ​​the gas spring piston assembly;

[0019] Figure 6 It is a schematic diagram of the dimensions of the temperature compensation component;

[0020] Figure 7 This is a schematic diagram comparing the effect of temperature on the force of a temperature-compensated gas spring and a common gas spring.

[0021] Among them: 1. pipe end ball socket, 2. steel pipe assembly, 3. first rolling groove, 4. temperature compensation assembly, 5. second rolling groove, 6. piston assembly, 7. piston rod, 8. third rolling groove, 9. sealing assembly, 10. rod end ball socket, 4-1. telescopic rod, 4-2. temperature sensitive wax layer, 4-3. compensation cavity, 4-4. sleeve, 4-5. right vent, 4-6. left vent. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The embodiments in the basic utility model and all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-4 As shown, the temperature compensation component is placed inside the steel pipe component and fixed by two rolling grooves on the left and right of the steel pipe to prevent it from moving inside the steel pipe. The temperature compensation component consists of a telescopic rod, temperature sensitive wax and a sleeve. Vents are designed on the left and right sides of the sleeve to connect the left and right cavities of the steel pipe to ensure that the pressure in the cavities on both sides is the same. The temperature sensitive wax in the temperature compensation component has the characteristics of thermal expansion and contraction. When the outside temperature is low, the temperature sensitive wax automatically contracts, the compensation cavity pushes the telescopic rod to extend, and the cavity volume in the steel pipe decreases, thereby compensating for the cavity pressure attenuation caused by the gas contraction in the steel pipe; when the temperature is high, the temperature sensitive wax expands, driving the telescopic rod to contract, and the cavity volume in the steel pipe increases, thereby offsetting the increase in cavity pressure caused by the expansion of the gas in the steel pipe, and finally achieving the purpose of maintaining the relatively stable output force of the gas spring. Since the wax can change its volume in real time according to the temperature, it can solve the problem of insufficient force of the gas spring in winter and the disadvantage of excessive force of the gas spring in summer.

[0024] like Figure 1-4As shown, the figure includes a pipe end ball socket 1, a steel pipe assembly 2 and a rod end ball socket 10. The steel pipe assembly 2 is provided with a piston rod 7, one end of which is connected to the steel pipe assembly 2 and the other end extends outside the steel pipe assembly 2. The pipe end ball socket 1 is installed at the end of one end of the steel pipe assembly 2, and the rod end ball socket 10 is installed at the other end of the piston rod 7. The steel pipe assembly 2 is also provided with a temperature compensation assembly 4, and the temperature compensation assembly 4 includes a sleeve 4-4, and the sleeve 4-4 is provided with a temperature sensitive wax layer 4-4 that fits one end thereof. 2 and compensation cavity 4-3, a telescopic rod 4-1 is also arranged in the sleeve 4-4, the telescopic rod 4-1 is located between the temperature-sensitive wax layer 4-2 and the compensation cavity 4-3, and one end of the telescopic rod 4-1 extends out of the sleeve 4-4, the distance from the end of the telescopic rod 4-1 extending out of the sleeve 4-4 to one end of the steel pipe assembly 2 is greater than the distance that the telescopic rod 4-1 extends out under the action of thermal expansion and contraction of the temperature-sensitive wax layer 4-2, and the left and right sides of the sleeve 4-4 are designed with a right vent 4-5 and a left vent 4-6. The tube end ball socket 1 is installed at the end of the gas spring steel pipe, and the rod end ball socket 10 is installed on the piston rod side of the gas spring. The ball socket cooperates with the ball head of the vehicle body to fix the gas spring. The temperature compensation assembly 4 is placed inside the steel pipe assembly 2 and is constrained and fixed by the first rolling groove 3 and the second rolling groove 5. The temperature sensitive wax 4-2 in the temperature compensation component 4 has the characteristics of thermal expansion and contraction. When the external temperature is low, the temperature sensitive wax 4-2 automatically contracts, and the compensation cavity 4-3 pushes the telescopic rod 4-1 to extend to the left, and the cavity volume in the steel pipe is reduced, thereby compensating for the cavity pressure attenuation caused by the contraction of the gas in the steel pipe; when the temperature is high, the temperature sensitive wax 4-2 expands, driving the telescopic rod 4-1 to contract, and the cavity volume in the steel pipe increases, thereby offsetting the increase in cavity pressure caused by the expansion of the gas in the steel pipe, and finally achieving the purpose of maintaining the relatively stable output force value of the gas spring.

[0025] The telescopic rod 4-1 is T-shaped and is installed at the temperature-sensitive wax layer 4-2. When the temperature-sensitive wax layer 4-2 expands or contracts, the telescopic rod 4-1 is pushed to extend or contract.

[0026] The steel pipe assembly 2 is provided with a first rolling groove 3 and a second rolling groove 5 for constraining and fixing the temperature compensation assembly 4, and the temperature compensation assembly 4 is located between the first rolling groove 3 and the second rolling groove 5. The steel pipe assembly 2 is provided with a third rolling groove 8 for constraining and fixing the sealing assembly 9.

[0027] A riveted piston assembly 6 is provided at one end of the piston rod 7, and a sealing assembly 9 is also provided on the piston rod 7, and the sealing assembly 9 is located at the end of the other end of the steel pipe assembly 2. The pressure of the left and right cavities of the piston assembly 6 is the same, but the left and right sides of the piston assembly 6 occupy different areas in the cavity, so a pressure difference is generated, so that the gas spring provides a supporting force for extending outward.

[0028] The telescopic rod 4 - 1 in the temperature compensation component 4 is at a distance from the bottom of the steel pipe component 2 , ensuring that the telescopic rod 4 - 1 will not touch the bottom of the steel pipe component 2 even if it is extended to the limit.

[0029] A right air vent 4-5 is provided on the right side of the sleeve 4-4, and a left air vent 4-6 is provided on the left side. The purpose of the air vents is to connect the left and right cavities of the steel pipe to ensure that the pressures in the cavities on both sides are the same.

[0030] The temperature compensation component 4 can be designed to have different lengths, diameters and other specifications, and can be well matched to different types of gas springs. In addition, the telescopic rod 4-1 can also be designed as a hollow tube, so as to fill more temperature-sensitive wax and further increase the temperature compensation space.

[0031] In order to further illustrate the specific temperature compensation working principle of the present invention, Figure 5 , Figure 6 The size diagram has the following derivation formula:

[0032] The ideal gas law is as follows:

[0033] PV=nRT

[0034] P---gas pressure;

[0035] V---cavity volume;

[0036] n---the amount of gaseous substance;

[0037] R---ideal gas constant

[0038] T---ambient temperature.

[0039] The relationship between the force value and temperature of ordinary gas springs is as follows:

[0040] F=nR(S2-S1)T / V

[0041] S1---piston assembly rod side area;

[0042] S2---The back area of ​​the piston assembly.

[0043] The relationship between the force value and temperature of the gas spring with temperature compensation component is as follows:

[0044] F=4nR(S2-S1)T / (4V+π(D 2 2 -D 1 2 )αTL)

[0045] D1---diameter of telescopic rod;

[0046] D2---Inner diameter of casing;

[0047] α---Linear thermal expansion coefficient of temperature sensitive wax;

[0048] L---Length of temperature sensitive wax line.

[0049] like Figure 7 As shown in the figure, the force of ordinary gas springs will increase sharply when the temperature rises due to gas expansion, and will decrease sharply when the temperature drops due to gas contraction. Therefore, the force is unstable and greatly affected by temperature, resulting in completely different user experiences in winter and summer. Due to the temperature compensation component, the force of the gas spring will only increase slowly due to volume compensation when the temperature rises, and will only decrease slowly due to gas reverse compensation when the temperature drops, thereby reducing the sensitivity of the gas spring force to temperature. It is particularly important to note that the compensation is real-time and stepless.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas spring with a temperature compensation function, comprising a tube end ball socket (1), a steel tube assembly (2) and a rod end ball socket (10), wherein a piston rod (7) is provided in the steel tube assembly (2), one end of which is connected to the steel tube assembly (2) and the other end of which extends outside the steel tube assembly (2), the tube end ball socket (1) is installed at the end of one end of the steel tube assembly (2), and the rod end ball socket (10) is installed at the other end of the piston rod (7), characterized in that: The steel pipe assembly (2) is further provided with a temperature compensation assembly (4), the temperature compensation assembly (4) comprising a sleeve (4-4), a temperature-sensitive wax layer (4-2) and a compensation cavity (4-3) being provided in the sleeve (4-4), a telescopic rod (4-1) being located between the temperature-sensitive wax layer (4-2) and the compensation cavity (4-3), and one end of the telescopic rod (4-1) extending out of the sleeve (4-4), the distance between the end of the portion of the telescopic rod (4-1) extending out of the sleeve (4-4) and the end of one end in the steel pipe assembly (2) being greater than the distance that the telescopic rod (4-1) extends out under the action of thermal expansion and contraction of the temperature-sensitive wax layer (4-2), and a right vent (4-5) being provided on the right side of the sleeve (4-4) and a left vent (4-6) being provided on the left side.

2. A gas spring with temperature compensation function as claimed in claim 1, characterized in that: The telescopic rod (4-1) is T-shaped and is installed on the temperature-sensitive wax layer (4-2).

3. A gas spring with temperature compensation function as claimed in claim 1, characterized in that: The steel pipe component (2) is provided with a first rolling groove (3) and a second rolling groove (5) for constraining and fixing the temperature compensation component (4); the temperature compensation component (4) is located between the first rolling groove (3) and the second rolling groove (5).

4. A gas spring with temperature compensation function as claimed in claim 1, characterized in that: A riveted piston assembly (6) is provided at one end of the piston rod (7), and a sealing assembly (9) is also provided on the piston rod (7). The sealing assembly (9) is located at the end of the other end of the steel pipe assembly (2).

5. A gas spring with temperature compensation function as claimed in claim 1, characterized in that: The steel pipe assembly (2) is provided with a third rolling groove (8) for constraining and fixing the sealing assembly (9).

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