Pressure retaining valve, air spring and vehicle

Abstract

The utility model discloses a pressure retaining valve, an air spring and a vehicle, the pressure retaining valve comprises a valve body and a connecting structure, the connecting structure comprises an inner sleeve, an outer sleeve and a buffer piece, the inner sleeve is connected with the valve body, and the buffer piece is arranged between the inner sleeve and the outer sleeve. Therefore, the connecting structure ensures that the pressure retaining valve is firmly connected with other parts in a sealed mode, the inner sleeve is suitable for being connected with the valve body, the outer sleeve plays a role in protecting the inner sleeve and enhancing the overall structural strength of the connecting structure, and the buffering piece is arranged in the gap between the inner sleeve and the outer sleeve and can play a role in sealing, buffering and damping. When the pressure retaining valve is subjected to external force, the buffering piece can absorb the acting force, the problem of air leakage of the pressure retaining valve caused by deflection and dislocation of the valve body of the pressure retaining valve due to stress is avoided, and the pressure retaining valve can stably and reliably work under complex working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of air springs, in particular to a pressure-maintaining valve, an air spring and a vehicle. Background Art

[0002] In the prior art, a hard connection is adopted between the pressure-maintaining valve and the mounting seat in the air spring. At the same time, since the pressure-maintaining valve has no protective device, it is easy to be bumped during transportation and assembly. The bump causes the inner and outer frames of the pressure-maintaining valve to deflect and misalign, affecting the sealing performance of the sealing ring, and further causing air leakage in the air spring. The height of the entire vehicle is reduced, affecting the normal use of the vehicle and affecting the reliability of the vehicle. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the first purpose of the utility model is to provide a pressure-maintaining valve, which can improve the reliability of the pressure-maintaining valve and extend the service life of the pressure-maintaining valve.

[0004] The second objective of the present utility model is to provide an air spring, comprising the pressure-maintaining valve described in the above embodiment.

[0005] The third objective of the present utility model is to provide a vehicle, comprising the air spring described in the above embodiment.

[0006] The pressure-maintaining valve according to the first embodiment of the utility model comprises: a valve body and a connecting structure, wherein the connecting structure comprises an inner sleeve, an outer sleeve and a buffer, wherein the inner sleeve is connected to the valve body, and the buffer is arranged between the inner sleeve and the outer sleeve.

[0007] According to the pressure-maintaining valve of the embodiment of the utility model, the connection structure is a structure that ensures that the pressure-maintaining valve is firmly and tightly connected to other components. The inner sleeve is suitable for being connected to the valve body, and the outer sleeve plays a role in protecting the inner sleeve and enhancing the overall structural strength of the connection structure. The buffer member is arranged in the gap between the inner sleeve and the outer sleeve to play a role in sealing and buffering shock absorption. When the pressure-maintaining valve is subjected to external force, the buffer member can absorb the force to avoid the valve body of the pressure-maintaining valve from being deflected and dislocated due to the force, resulting in air leakage of the pressure-maintaining valve, so that the pressure-maintaining valve can work stably and reliably under complex working conditions.

[0008] In some embodiments, the inner sleeve is threadedly connected to the valve body.

[0009] In some embodiments, the buffer is made of rubber.

[0010] In some embodiments, the outer sleeve includes: a first connection portion and a second connection portion, the first connection portion is connected to the second connection portion, and the first connection portion is arranged adjacent to the valve body relative to the second connection portion.

[0011] In some embodiments, a projection of the first connecting portion on the second connecting portion along a center line direction of the valve body is in a polygonal shape.

[0012] In some embodiments, a cross-sectional area of ​​the first connecting portion is smaller than a cross-sectional area of ​​the second connecting portion.

[0013] In some embodiments, the surfaces of both ends of the inner sleeve and the outer sleeve along the center line direction of the valve body are flush.

[0014] The air spring according to the embodiment of the second aspect of the utility model comprises the pressure-maintaining valve according to the embodiment of the first aspect of the utility model.

[0015] In some embodiments, it also includes: a mounting seat and a sealing member, wherein a mounting groove is formed on the mounting seat, and an end of the outer sleeve of the pressure maintaining valve away from the valve body of the pressure maintaining valve cooperates with the mounting groove; the sealing member is arranged between the mounting seat and the connecting structure of the pressure maintaining valve.

[0016] A vehicle according to an embodiment of the third aspect of the utility model comprises an air spring according to an embodiment of the second aspect of the utility model.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 It is a schematic diagram of a pressure-maintaining valve and a mounting seat according to an embodiment of the utility model.

[0020] Figure 2 It is a cross-sectional schematic diagram of a pressure-maintaining valve and a mounting seat according to an embodiment of the utility model.

[0021] Figure 3 yes Figure 2 Schematic diagram of the enlarged P region.

[0022] Reference numerals:

[0023] 100. Pressure maintaining valve;

[0024] 10. Valve body;

[0025] 20. connection structure; 21. inner sleeve; 22. outer sleeve; 221. first connection part; 222. second connection part; 23. buffer; 24. sealing part;

[0026] 30. Mounting seat; 31. Mounting slot. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Figure 1-Figure 3 A pressure maintaining valve 100 according to an embodiment of the present utility model is described, comprising: a valve body 10 and a connecting structure 20 .

[0028] Specifically, if Figure 1-Figure 3 As shown, the connection structure 20 includes an inner sleeve 21 , an outer sleeve 22 and a buffer 23 . The inner sleeve 21 is connected to the valve body 10 , and the buffer 23 is disposed between the inner sleeve 21 and the outer sleeve 22 .

[0029] The connection structure 20 is connected to one end of the valve body 10. The connection structure 20 is a structure that ensures that the pressure-maintaining valve 100 is firmly connected to other components. The inner sleeve 21 of the connection structure 20 is directly connected to one end of the valve body 10. The inner sleeve 21 is sleeved on one end of the valve body 10. The outer sleeve 22 of the connection structure 20 is wrapped around the outer side of the inner sleeve 21. A certain gap is left between the inner sleeve 21 and the outer sleeve 22. The buffer 23 is arranged in the gap between the inner sleeve 21 and the outer sleeve 22.

[0030] According to the pressure-maintaining valve 100 of the embodiment of the utility model, the connecting structure 20 is a structure that ensures that the pressure-maintaining valve 100 is firmly and tightly connected to other components. The inner sleeve 21 is suitable for being connected to the valve body 10, and the outer sleeve 22 plays a role in protecting the inner sleeve 21 and enhancing the overall structural strength of the connecting structure 20. The buffer member 23 is arranged in the gap between the inner sleeve 21 and the outer sleeve 22 to play a role in sealing and buffering shock absorption. When the pressure-maintaining valve 100 is subjected to external force, the buffer member 23 can absorb the force to avoid the valve body 10 of the pressure-maintaining valve 100 from being deflected and dislocated due to the force, resulting in air leakage of the pressure-maintaining valve 100, so that the pressure-maintaining valve 100 can work stably and reliably under complex working conditions.

[0031] According to some embodiments of the present invention, Figure 2 and Figure 3As shown, the inner sleeve 21 is threadedly connected to the valve body 10. The inner sleeve 21 is connected to the valve body 10 by threads, and an inner thread is formed on the inner wall of the inner sleeve 21, and an outer thread is formed on the outer wall of the valve body 10 and the inner sleeve 21 at one end. The inner sleeve 21 and the valve body 10 cooperate with each other through corresponding inner and outer threads. The threaded connection method is convenient for installation and disassembly, and has high connection strength. The matching method of the inner sleeve 21 and the valve body 10 includes but is not limited to threaded connection. Therefore, the matching of the inner sleeve 21 and the valve body 10 facilitates the convenience of assembly between the connecting structure 20 and the valve body 10, improves the connection strength and durability between the valve body 10 and the connecting structure 20, and ensures the sealing performance between the valve body 10 and the connecting structure 20, ensures the normal operation of the pressure-maintaining valve 100, and extends the service life of the pressure-maintaining valve 100.

[0032] According to some embodiments of the present invention, the buffer member 23 is made of rubber.

[0033] Rubber is a highly elastic material that can be significantly deformed under stress, and can quickly return to its initial state when the external force is removed. This excellent elastic property makes rubber widely used in the manufacture of various parts that need to absorb shock, vibration or provide reset function. Rubber has good elasticity, wear resistance, air tightness, weather resistance and aging resistance. Rubber also has high tear strength and tensile strength. Further, the buffer 23 can be vulcanized rubber, and the rubber that has been vulcanized is called vulcanized rubber. Vulcanized rubber refers to the process in which unvulcanized rubber (raw rubber) undergoes chemical reaction with sulfur or other vulcanizing agents at a certain temperature, pressure and time, so that cross-linking bonds are generated between rubber molecular chains to form a three-dimensional network structure. The vulcanization process transforms rubber from linear macromolecules to spatial network structures, significantly improving the physical and mechanical properties of rubber such as tensile strength, hardness, tear resistance, elasticity and resilience, so that it can meet the needs of various applications. Vulcanization makes rubber have better oil resistance, solvent resistance, acid and alkali resistance, aging resistance and other properties, greatly extending the service life of rubber.

[0034] Therefore, the buffer 23 is made of rubber material, which can effectively improve the mechanical properties, chemical properties and thermal temperature resistance of the buffer 23, improve the reliability, sealing and impact resistance of the buffer 23, and enable the buffer 23 to maintain a stable shape when subjected to tension or shear force, thereby enhancing the overall performance of the connecting structure 20.

[0035] According to some embodiments of the present invention, Figure 1-Figure 3As shown, the outer sleeve 22 includes: a first connection portion 221 and a second connection portion 222, the first connection portion 221 is connected to the second connection portion 222, and the first connection portion 221 is arranged adjacent to the valve body 10 relative to the second connection portion 222. The first connection portion 221 and the second connection portion 222 are an integral structure, and the first connection portion 221 is arranged adjacent to the valve body 10, which is conducive to simplifying the assembly method of the outer sleeve 22 and improving the maintenance convenience of the outer sleeve 22. Therefore, the first connection portion 221 and the second connection portion 222 are an integral whole, which can improve the connection stability between the connection structure 20 and the valve body 10 and enhance the structural strength of the outer sleeve 22. The first connection portion 221 is arranged adjacent to the valve body 10, which is also conducive to the assembly of the connection structure 20 and the valve body 10, and is convenient for daily inspection, maintenance and debugging of the pressure-maintaining valve 100.

[0036] According to some embodiments of the present invention, Figure 1-3 As shown, the projection of the first connection portion 221 on the second connection portion 222 along the centerline direction of the valve body 10 is a polygon. In some embodiments, the projection of the first connection portion 221 on the second connection portion 222 along the centerline direction of the valve body 10 is a hexagonal structure. This structural arrangement facilitates the assembly between the outer sleeve 22 and the valve body 10. The corners or edges of the first connection portion 221 can be used as positioning or guiding features when assembling or disassembling the outer sleeve 22, which can simplify the assembly process of the outer sleeve 22. Therefore, the polygonal shape of the first connection portion 221 is conducive to reducing the assembly difficulty of the connection structure 20, ensuring the precise fit and convenient installation between the valve body 10 and the connection structure 20, and enhancing the structural stability and reliability of the pressure-maintaining valve 100.

[0037] According to some embodiments of the present invention, Figure 1-Figure 3 As shown, the cross-sectional area of ​​the first connection part 221 is smaller than the cross-sectional area of ​​the second connection part 222. That is, along the direction of the center line of the valve body 10, the projection of the first connection part 221 is located within the projection of the second connection part 222, and the first connection part 221 is a polygonal structure. The smaller cross-sectional area of ​​the first connection part 221 can avoid interference between the first connection part 221 and other components under the premise of simplifying the assembly process of the outer sleeve 22, thereby saving the installation space of the connection structure 20. Therefore, the cross-sectional area of ​​the first connection part 221 is smaller than the cross-sectional area of ​​the second connection part 222, which can make the connection structure 20 more compact and save installation space under the premise of ensuring the convenience of assembly of the connection structure 20, and can also reduce the amount of materials required for the outer sleeve 22, thereby reducing the production cost of the connection structure 20.

[0038] According to some embodiments of the present invention, Figure 3As shown, the surfaces of both ends of the inner sleeve 21 and the outer sleeve 22 along the centerline direction of the valve body 10 are flush. The corresponding ends of the inner sleeve 21 and the outer sleeve 22 along the centerline direction of the valve body 10 are aligned with each other on the same surface, that is, the lengths of the inner sleeve 21 and the outer sleeve 22 along the centerline direction of the valve body 10 are equal, and the surfaces of both ends of the connection structure 20 along the centerline direction of the valve body 10 are flat without obvious bumps, ensuring the sealing performance and the stability of the overall structure when the end faces of the connection structure 20 are docked with other components. Therefore, the flush end faces of the inner sleeve 21 and the outer sleeve 22 help to achieve accurate docking of the two in the centerline direction of the valve body 10, avoid problems such as sealing failure, fluid leakage or mechanical stress concentration caused by misalignment, help maintain the integrity of the overall structure of the connection structure 20, enhance the vibration resistance, durability and reliability of the pressure-maintaining valve 100 during operation, simplify the assembly process of the inner sleeve 21 and the outer sleeve 22 and other related components, reduce the adjustment work caused by size mismatch, and improve assembly efficiency. The flush end faces make the appearance of the pressure maintaining valve 100 more regular, and can improve the overall quality of the pressure maintaining valve 100.

[0039] The air spring according to the embodiment of the second aspect of the utility model includes the pressure-maintaining valve 100 according to the embodiment of the first aspect of the utility model. The pressure-maintaining valve 100 is an important component in the air spring system, and its main function is to maintain the stability of the gas pressure inside the air spring, to prevent the air spring from having insufficient internal pressure due to gas leakage, and torsional deformation of the air spring bladder, which affects the durability of the air spring bladder. The pressure-maintaining valve 100 is fixed to the inside of the air spring through a connecting structure 20. The setting of the connecting structure 20 can adjust the connection between the pressure-maintaining valve 100 and the air spring from a hard connection to a soft connection. When it is bumped, the internal buffer 23 of the connecting structure 20 is deformed to buffer the force on the pressure-maintaining valve 100, thereby effectively avoiding the problem of air spring leakage caused by the bump of the pressure-maintaining valve 100.

[0040] According to the air spring of the embodiment of the utility model, by applying the pressure-maintaining valve 100 described in the above embodiment, the pressure-maintaining valve 100 is fixedly installed on the air spring through the connecting structure 20. The setting of the connecting structure 20 can make the connection assembly between the pressure-maintaining valve 100 and the air spring more stable and reliable, and can also enhance the sealing performance between the pressure-maintaining valve 100 and the air spring, play a role in buffering, sealing and shock absorption, thereby improving the reliability and stability of the air spring and extending the service life of the air spring.

[0041] According to some embodiments of the present invention, Figure 1-Figure 3As shown, it also includes: a mounting seat 30, a mounting groove 31 is formed on the mounting seat 30, and one end of the outer sleeve 22 of the pressure-maintaining valve 100 away from the valve body 10 of the pressure-maintaining valve 100 cooperates with the mounting groove 31. The mounting groove 31 is a groove structure specially processed on the mounting seat 30 for accommodating and fixing the outer sleeve 22 of the pressure-maintaining valve 100. Its shape and size should accurately match the contour of the outer sleeve 22 to ensure good matching and supporting effects. The mounting groove 31 and the outer sleeve 22 of the pressure-maintaining valve 100 can be threadedly connected, and an internal thread is formed on the inner side wall of the mounting groove 31, and an external thread is formed on the outer side wall of the outer sleeve 22. The outer sleeve 22 and the mounting groove 31 cooperate with each other through corresponding internal and external threads to achieve the connection between the pressure-maintaining valve 100 and the mounting seat 30.

[0042] Therefore, a mounting groove 31 is formed on the mounting seat 30 to facilitate the assembly of the pressure-maintaining valve 100 on the air spring. The mounting seat 30 and its mounting groove 31 provide stable support and a convenient installation method for the pressure-maintaining valve 100. Through the effective cooperation between the mounting groove 31 and the outer sleeve 22, the safe and reliable operation of the pressure-maintaining valve 100 in the air spring is ensured, and the cooperation between the pressure-maintaining valve 100 and the mounting groove 31 is simple and fast, easy to adjust and disassemble, and convenient for the maintenance and inspection of the pressure-maintaining valve 100.

[0043] According to some embodiments of the present invention, Figure 3 As shown, it also includes: a seal 24, which is arranged between the mounting seat 30 and the connection structure 20 of the pressure-maintaining valve 100. The seal 24 is installed between the mounting seat 30 and the docking surface of the connection structure 20 of the pressure-maintaining valve 100. Specifically, the seal 24 is first placed at the corresponding position of the mounting groove 31 and the connection structure 20, and then the connection structure 20 is assembled in the mounting groove 31, so that the outer sleeve 22 of the connection structure 20 and the mounting groove 31 are fixed by threaded connection, and at the same time, the seal 24 is squeezed and deformed to a certain extent, ensuring that it can effectively fill and block the potential leakage path after being pressurized, and play a sealing role. Then, one end of the valve body 10 of the pressure-maintaining valve 100 is assembled into the inner sleeve 21, so that one end of the valve body 10 and the inner sleeve 21 are fixed by threaded connection, and the assembly of the pressure-maintaining valve 100 and the mounting seat 30 can be completed. Therefore, the main purpose of the seal 24 is to prevent the medium from leaking from the gap between the mounting seat 30 and the connection structure 20 of the pressure-maintaining valve 100, ensure the overall sealing performance of the air spring, and improve the stability and reliability of the assembly between the pressure-maintaining valve 100 and the mounting.

[0044] A vehicle according to an embodiment of the third aspect of the utility model comprises an air spring according to an embodiment of the second aspect of the utility model.

[0045] The vehicle according to the embodiment of the utility model can improve the overall reliability and stability of the vehicle, improve the durability of the vehicle, reduce the subsequent maintenance cost of the vehicle, and extend the service life of the vehicle by applying the air spring described in the above embodiment.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In the description of the present utility model, "first feature" and "second feature" may include one or more of the features. In the description of the present utility model, "plurality" means two or more. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact not directly but through another feature between them. In the description of the present utility model, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pressure-maintaining valve, characterized in that: include: Valve body; The connecting structure comprises an inner sleeve, an outer sleeve and a buffer, wherein the inner sleeve is connected to the valve body, and the buffer is arranged between the inner sleeve and the outer sleeve.

2. The pressure-maintaining valve according to claim 1, characterized in that: The inner sleeve is threadedly connected to the valve body.

3. The pressure-maintaining valve according to claim 1, characterized in that: The buffer is made of rubber.

4. The pressure-maintaining valve according to claim 1, characterized in that: The outer sleeve comprises: a first connecting portion; The first connection part is connected to the second connection part, and the first connection part is arranged adjacent to the valve body relative to the second connection part.

5. The pressure-maintaining valve according to claim 4, characterized in that: A projection of the first connection portion on the second connection portion along a center line direction of the valve body is in a polygonal shape.

6. The pressure-maintaining valve according to claim 4, characterized in that: A cross-sectional area of ​​the first connection portion is smaller than a cross-sectional area of ​​the second connection portion.

7. The pressure-maintaining valve according to any one of claims 1 to 6, characterized in that: The surfaces of both ends of the inner sleeve and the outer sleeve along the center line direction of the valve body are flush.

8. An air spring, characterized in that: It comprises a pressure maintaining valve according to any one of claims 1-7.

9. The air spring according to claim 8, characterized in that: Also includes: A mounting seat, wherein a mounting groove is formed on the mounting seat, and an end of the outer sleeve of the pressure-maintaining valve away from the valve body of the pressure-maintaining valve cooperates with the mounting groove; A sealing member is arranged between the mounting seat and the connecting structure of the pressure maintaining valve.

10. A vehicle, characterized in that: Comprising an air spring according to claim 8 or 9.

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