Cylinder fixing assembly, air pump, air suspension and vehicle

Abstract

The utility model discloses an air cylinder fixing assembly, which is used for fixing an air cylinder in an air pump and comprises a cylinder body, an air cylinder cover and an air cylinder cover, the cylinder cover is arranged on the cylinder body in a sleeving mode and provided with a gas channel and a valve plate capable of opening the gas channel in a one-way mode so as to achieve one-way circulation of gas; and the limiting cover is detachably mounted on the mounting hole of the air pump so as to block the mounting hole, the limiting cover abuts against the first end face of the cylinder cover, and the limiting cover is used for limiting the opening stroke of the valve plate. According to the air cylinder fixing assembly, through the arrangement of the limiting cover and the cylinder cover, the opening stroke of the valve plate is limited, the situation that the valve plate is difficult to reset due to too large deformation quantity is avoided, the detachable limiting cover, the valve cover and the cylinder body are tightly matched and can be flexibly detached to replace parts, and the service life of an air pump is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pistons, in particular to a cylinder fixing component, an air pump, an air suspension and a vehicle. Background Art

[0002] The air suspension is composed of elastic elements, shock absorbers, guide mechanisms and other components. It is responsible for connecting the car body, chassis and wheels, transmitting the forces and torques between them, and mitigating the impact from the road surface, which can significantly improve driving comfort and handling. The air suspension system includes an air pump. The air pump is used to compress air to provide compressed air to the air suspension system. The air pump has an air circuit block, in which a cylinder and piston assembly are arranged for compressing air.

[0003] The existing cylinder fixing assembly cannot realize the convenient disassembly of the limit cover body to replace the valve plate and other parts in the pump body. Utility Model Content

[0004] The utility model aims to provide a cylinder fixing component, an air pump, an air suspension and a vehicle, so as to solve the problem that the cylinder fixing component is inconvenient to disassemble.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a cylinder fixing assembly for an air suspension, comprising:

[0007] A cylinder fixing assembly, used to fix the cylinder in an air pump, characterized by comprising:

[0008] A cylinder body, mounted in the air pump;

[0009] The cylinder cover is sleeved on the cylinder body, and is provided with a gas passage and a valve sheet which can open the gas passage in one direction, so as to realize one-way flow of gas;

[0010] The limit cover is detachably mounted on the mounting hole of the air pump to block the mounting hole. The limit cover abuts against the first end surface of the cylinder cover. The limit cover is used to limit the opening stroke of the valve plate.

[0011] In one embodiment, a limiting groove is provided on a side of the limiting cover close to the cylinder head, the limiting groove abuts against the first end surface of the cylinder head, a limiting portion is provided in the limiting groove, and the limiting portion is spaced apart from the valve plate.

[0012] In one embodiment, the limiting portion is a boss provided at the center of the bottom wall of the limiting groove.

[0013] In one embodiment, a thread is provided on the outer peripheral side of the limit cover, and the limit cover and the air pump are threadedly connected.

[0014] In one embodiment, a mounting groove for mounting the limiting cover is formed on a side of the limiting cover away from the cylinder head.

[0015] In one implementation, the cross-section of the installation groove along the radial direction of the limiting cover is a regular hexagon.

[0016] In one embodiment, a penetrating gas passage is formed on the first end surface of the cylinder cover, and the gas passage is used to transport gas to the first end surface.

[0017] In one embodiment, the valve plate is in close contact with the first end surface, and because the pressure in the gas channel is greater than the pressure outside the valve plate, the valve plate is elastically deformed and moves away from the first end surface.

[0018] In one embodiment, the valve plate is provided with a connection hole, and the cylinder cover further comprises a fastener, which passes through the connection hole and is connected and fixed to the cylinder cover.

[0019] In one embodiment, a first end surface of the cylinder cover is provided with a plurality of positioning bosses arranged at intervals, and two adjacent positioning bosses form an air flow channel.

[0020] In one embodiment, the cylinder head further has a second end face opposite to the first end face, and a matching groove is further provided on the second end face, the bottom wall of the matching groove abuts against the cylinder body, and the inner peripheral wall of the matching groove is interference fit with the outer peripheral wall of the cylinder body.

[0021] In one embodiment, a sealing groove is provided on the outer peripheral wall of the cylinder body, a sealing member is provided in the sealing groove, and the sealing member is in abutment with the inner peripheral wall of the third groove.

[0022] In a second aspect, the utility model provides an air pump, comprising a cylinder fixing assembly as described in any one of the first aspects.

[0023] In a third aspect, the utility model provides an air suspension, comprising an elastic element and an air pump as in the second aspect, wherein the air pump is used to compress the elastic element.

[0024] In a fourth aspect, the utility model provides a vehicle, comprising an axle, a frame and an air suspension as in the third aspect, wherein the air suspension is used to connect the axle and the frame.

[0025] The cylinder fixing assembly of the utility model limits the opening stroke of the valve plate by arranging a limit cover and a cylinder cover, and the limit cover, the valve cover and the cylinder body are tightly matched through the cooperation of various connecting parts, so that the limit cover is easy to install and disassemble, and it is convenient to replace parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1It is an exploded view of a cylinder fixing assembly provided in one embodiment of the utility model;

[0028] Figure 2 It is a cross-sectional view of a cylinder fixing assembly provided in one embodiment of the utility model;

[0029] Figure 3 It is a cross-sectional view of a limit cover provided in one embodiment of the utility model;

[0030] Figure 4 It is a cross-sectional view of a cylinder head provided in one embodiment of the utility model;

[0031] Figure 5 This is a connection diagram of a valve plate, a cylinder cover and a cylinder body provided in one embodiment of the utility model;

[0032] Figure numerals: 00, air pump, 001, mounting hole, 10, limiting cover, 11, limiting groove, 12 limiting portion, 13, mounting groove, 20, cylinder head, 21, valve plate, 211, connecting hole, 212, annular groove, 22, first end face, 23, fastener, 24, positioning boss, 241, air flow channel, 25, groove, 26, gas channel, 27, matching hole, 28, second end face, 29, matching groove, 30, cylinder body, 31, sealing groove, 32, sealing member DETAILED DESCRIPTION

[0033] In order to understand the features and technical contents of the embodiments of the present utility model in more detail, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present utility model.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0035] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0036] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] refer to Figure 1 and Figure 2 The utility model provides a cylinder fixing assembly for air suspension, the cylinder fixing assembly comprising a limit cover 10, a cylinder head 20 and a cylinder body 30. The limit cover 10 is provided with a limit groove 11 on one side close to the cylinder head 20, and a limit portion 12 is arranged in the limit groove 11. The cylinder head 20 is sleeved on the cylinder body 30, and a groove 25 is provided on the first end surface 22 thereof, and a gas channel 26 is provided on the bottom wall of the groove 25, and the radial dimension of the groove 25 is greater than the radial dimension of the gas channel 26. The valve plate 21 is connected to the first end face 22 of the cylinder head 20. The valve plate 21 is tightly attached to the first end face 22 and closes the groove 25. When the air pressure in the groove 25 is greater than a preset value, the valve plate 21 elastically deforms and has a gap with the first end face 22, and abuts against the limiting portion 12. The limiting portion 12 is used to limit the gap distance between the valve plate 21 and the first end face 22 to avoid excessive elastic deformation of the valve plate 21 and to avoid affecting the sealing effect of the valve plate 21 on the gas channel 26 after resetting, thereby increasing the service life of the valve plate 21.

[0038] The cylinder head 20 is made of a material with high structural strength, specifically metal material, high-strength plastic, ceramic, etc. The metal material is aluminum, aluminum alloy, magnesium alloy, iron and iron alloy, etc. The housing can be an integrated structure made by an integrated molding process, and the integrated molding process can be specifically stamping, casting, etc.

[0039] The limiting portion 12 is a boss arranged in the center of the bottom wall of the limiting groove 11, and its shape can be circular, square, polygonal, etc., and can produce a small gap with the first end face 22 of the cylinder head to limit the deformed valve plate 21 in the axial direction. The utility model does not impose any restrictions on this.

[0040] The cross-sectional shape of the gas channel 26 can be circular, elliptical, rectangular, etc., depending on the shape that can achieve the function of passing gas.

[0041] The valve plate 21 is made of a material with elastic deformation, specifically spring steel, rubber, etc. It can produce elastic deformation under the pressure difference on both sides to open the gas channel 26, and reset to close to the first end face 22 again after the pressure difference is reduced to re-block the gas channel 26.

[0042] The radial dimension of the groove 25 is larger than the radial dimension of the gas channel 26, so that the contact area between the gas and the valve plate 21 is increased after the gas passes through the gas channel 26, thereby avoiding the concentration of force on the valve plate 21 and reducing damage to the valve plate 21. The radial dimension of the groove 25 can be adjusted to change the preset value of the air pressure.

[0043] The limiting portion 12 is used to limit the gap distance between the valve plate 21 and the first end surface 22 to avoid excessive elastic deformation of the valve plate 21 and to avoid affecting the sealing effect of the valve plate 21 on the gas channel 26 after the valve plate 21 is reset, thereby increasing the service life of the valve plate 21.

[0044] In this embodiment, the limit cover 10 abuts against the cylinder head 20 while leaving a gap for the valve plate 21 to open and close. The limit boss air flow channel 241 allows gas to pass through. The cylinder head 20 and the cylinder body 30 have an interference fit, which improves the fixing strength and sealing of the air pump 00. The limit portion 12 limits the opening stroke of the valve plate 21 to prevent it from deforming too much and being difficult to reset, thereby extending the service life of the valve plate 21. The limit cover 10 can be detachably installed in the air pump 00 and can be flexibly disassembled to replace parts, thereby improving the service life of the air pump 00.

[0045] refer to Figure 2 and Figure 3 In one embodiment, a mounting groove 13 is formed on a side of the limiting cover 10 away from the cylinder cover 20 .

[0046] In this embodiment, the side of the limit cover 10 may be provided with a threaded structure, and a threaded mounting hole 001 adapted thereto is provided in the air pump 00, and the two are connected by threads. The surface of the limit cover 10 is provided with a mounting groove 13 for mounting the limit cover 10, and the cross section of the mounting groove 13 along the radial direction of the limit cover 10 may be a triangle, a rectangle, a hexagon, a cross or other shapes. By placing a driving tool of a suitable shape into the mounting groove 13, the limit cover 10 can be rotated to be separated from the air pump 00 by rotating the mounting tool.

[0047] like Figure 1 As shown, in one embodiment, the valve plate 21 is provided with a connecting hole 211, and the connecting hole 211 is penetrated by a fastener (23) to closely contact the groove 25 of the first end surface 22 of the cylinder cover 20.

[0048] The valve plate 21 is used to close the groove 25. When the gas pressure is greater than a preset value, there is a gap between the valve plate 21 and the first end face 22. There is also an annular groove 212 near the periphery of the valve plate 21. The annular groove 212 is connected to the gas channel 26 to achieve one-way inflation while avoiding gas backflow, thereby improving the inflation efficiency of the air pump 00.

[0049] Specifically, the valve plate 21 is in close contact with the first end face 22 when there is no pressure difference on both sides or the pressure difference is small. When the pressure in the gas channel 26 is greater than the pressure on the outside of the valve plate 21, the valve plate 21 begins to elastically deform away from the first end face 22 when the pressure difference reaches the minimum value required for its elastic deformation, opening the gas channel 26. As the pressure difference gradually increases, the amplitude of the elastic deformation of the valve plate 21 also increases accordingly, and the degree of opening of the gas channel 26 also gradually increases until the valve plate 21 is against the limiting portion 12 of the limiting cover 10; when the pressure difference gradually decreases, the valve plate 21 reduces the deformation amplitude accordingly until the pressure difference is too small to cause the valve plate 21 to deform, and the valve plate 21 resets and is in close contact with the first end face 22 again, closing the gas channel 26, thereby achieving a one-way gas guide function.

[0050] There can be one or more connecting holes 211. Specifically, the connecting holes 211 can be opened on the periphery of the valve plate 21, and the matching holes 27 corresponding to the connecting holes 211 can be set between the intervals of the positioning bosses 24. When there are two connecting holes 211, the two connecting holes 211 can be relatively set at symmetrical positions close to the edge of the valve plate 21; when there are three connecting holes 211, they can also be respectively set at positions close to the edge of the valve plate 21 and correspond to the positions of the matching holes 27 on the cylinder head 20.

[0051] like Figure 1 , Figure 2 and Figure 4 As shown, the cylinder head 20 is provided with a matching hole 27 for receiving the fastener 23 and being connected and fixed with the fastener 23 .

[0052] The fastener 23 and the cylinder head 20 may be connected and fixed by screw connection, clamping connection, welding, etc.

[0053] The fastener 23 may be a wedge-shaped piece, and the matching hole 27 is correspondingly set as a wedge-shaped hole. The wedge-shaped piece is penetrated by a connecting hole 211 to match and fix with the wedge-shaped hole.

[0054] The fastener 23 may be a screw, and the matching hole 27 is correspondingly configured as a threaded hole. The screw passes through the connecting hole 211 and is matched and fixed with the threaded hole.

[0055] like Figure 1 and Figure 5 As shown, in one embodiment, the first end face 22 of the cylinder head 20 is further provided with a plurality of spaced positioning bosses 24 , and two adjacent positioning bosses 24 form an air flow channel 241 . When there is a gap between the valve plate 21 and the first end face 22 , the gas flows through the air flow channel 241 .

[0056] The spacing distances between the positioning bosses 24 can be consistent or inconsistent. It is understandable that the positioning bosses 24 need to have a certain spacing to allow the gas to flow out, and the spacing can be set according to actual conditions. Specifically, the positioning bosses 24 can be an arc on a circle with a notch, can be two or more arcs with multiple interruption points, or can be a number of cylinders or square bosses distributed in a point shape.

[0057] The connection holes 211 on the valve plate 21 are disposed between the gaps between adjacent positioning bosses 24 , and the corresponding fasteners 23 are also disposed between the gaps between adjacent positioning bosses 24 .

[0058] After the gas pressure reaches the preset value, the gas pushes open the valve plate 21 and then flows through the annular groove 212 and the air flow channel 241 to be discharged. The gas flows out from the air flow channel 241 and can quickly release the pressure, so that the gas pressure can quickly reach a value lower than the preset value, so that the valve plate 21 closes the groove 25 and reduces gas reflux. The limit cover 10 limits the opening stroke of the valve plate 21 to avoid excessive elastic deformation of the valve plate 21, resulting in poor sealing effect of the valve plate 21 on the gas channel 26 after reset, thereby increasing the service life of the air pump 00.

[0059] In one embodiment, a plurality of positioning bosses 24 are evenly spaced apart in the circumferential direction of the first end surface 22 .

[0060] The distribution and size of the air flow channel 241 formed between the evenly arranged positioning bosses 24 are consistent, which is conducive to the uniform discharge of gas, so that the valve plate 21 closes the groove 25 after the air pump 00 quickly releases pressure, avoiding gas backflow and improving the inflation efficiency of the one-way valve.

[0061] refer to Figure 4 In one embodiment, the cylinder head 20 further has a second end surface 28 , and a matching groove 29 is formed on the second end surface 28 . The gas passage 26 passes through the bottom wall of the matching groove 29 , and the bottom wall of the matching groove 29 abuts against the cylinder body 30 .

[0062] like Figure 1 Figure 2 and Figure 5 As shown, in one embodiment, the cylinder fixing assembly further includes a cylinder body 30, which is connected to the cylinder head 20. The cylinder body 30 is a cylindrical structure, and the gas passage 26 is connected to the cylinder body 30. A sealing groove 31 is provided on the outer peripheral wall of the cylinder body 30, and a sealing member 32 is provided in the sealing groove 31. The sealing member 32 is provided between the cylinder body 30 and the cylinder head 20 to enhance the sealing and fastening effect between the cylinder body 30 and the cylinder head 20.

[0063] The cylinder body 30 is made of a material with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc. The metal materials are aluminum, aluminum alloys, magnesium alloys, iron and iron alloys, etc. The cylinder body 30 can be an integrated structure made by an integrated molding process, and the integrated molding process can be specifically stamping, casting, etc., without limitation.

[0064] The cylinder body 30 and the cylinder head 20 may be connected by screw connection, welding or the like.

[0065] In one embodiment, the one-way valve further includes a piston rod, which is slidably connected to the cylinder body 30 , and the piston rod moves in the axial direction of the piston rod relative to the cylinder cover 20 .

[0066] The limiting cover 10 is in contact with the cylinder cover 20 , and the cylinder cover 20 is interference fit with the cylinder body 30 , which strengthens the fixing strength of the air pump 00 during the axial movement of the piston rod. The fixing method of the utility model improves the fixing strength and sealing of the air pump 00 .

[0067] In the utility model, the limit cover 10 abuts against the cylinder head 20 while leaving a gap for the opening and closing of the valve plate 21. The limit boss air flow channel 241 allows gas to pass through. The cylinder head 20 and the cylinder body 30 have an interference fit, which improves the fixing strength and sealing of the air pump 00. The limit portion 12 limits the opening stroke of the valve plate 21 to prevent it from being too deformed and difficult to reset, thereby extending the service life of the valve plate 21. The limit cover 10 can be detachably installed in the air pump 00 and can be flexibly disassembled to replace parts, thereby improving the service life of the air pump 00.

[0068] The utility model also provides an air pump, comprising the cylinder fixing assembly as described in any of the above embodiments.

[0069] The utility model further provides an air suspension, comprising an elastic element and an air pump 00 as described in any of the aforementioned embodiments, wherein the air pump 00 is used for compressing the elastic element.

[0070] The air suspension also includes a damping element, an air supply unit, a controller and a sensor. The elastic element can be a coil spring, a leaf spring, an air spring, etc., which is used for buffering, vibration reduction, load bearing, etc. The damping element is used to cooperate with the elastic element to buffer vibration and improve the driving smoothness on rough roads. The air supply unit includes an air pump 00, a distribution valve, a suspension, etc., which is used to adjust the telescopic state of the elastic element. The controller and the sensor are used to control the air supply unit and the shock absorber in real time to adjust the air spring stiffness, the shock absorber damping force and transmit the vehicle state.

[0071] The air pump 00 of the air suspension uses the cylinder fixing assembly of the utility model to enhance the fixing effect of each component, facilitate the disassembly and replacement of parts, and increase the service life of the air pump 00.

[0072] The utility model provides a vehicle, comprising an axle, a frame and an air suspension as described in any of the above embodiments, wherein the air suspension is used to connect the axle and the frame. The vehicle can be a rail transit vehicle or a road transit vehicle, without limitation. The air suspension used in the vehicle can mitigate the impact from the road surface, significantly improving the driving comfort and controllability.

[0073] It should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0074] 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 present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] It should be understood that although the embodiments of the utility model have been shown and described, the application of the present application is not limited to the above examples. For ordinary technicians in the field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the protection scope of the claims attached to this application. Ordinary technicians in the field can understand that the various changes, modifications, substitutions and variations made by implementing all or part of the processes of the above embodiments and in accordance with the claims of the utility model still belong to the scope covered by the utility model, and the scope of the utility model is defined by the claims and their equivalents.

Claims

1. A cylinder fixing assembly, used to fix the cylinder in an air pump (00), characterized in that: include: A cylinder body (30) is installed in the air pump (00); A cylinder cover (20) is sleeved on the cylinder body (30), and is provided with a gas passage (26) and a valve plate (21) which can open the gas passage (26) in one direction, so as to realize one-way gas circulation; A limit cover (10) is detachably mounted on the mounting hole (001) of the air pump (00) to block the mounting hole (001); the limit cover (10) abuts against the first end surface (22) of the cylinder cover (20); and the limit cover (10) is used to limit the opening stroke of the valve plate (21).

2. The cylinder fixing assembly according to claim 1, characterized in that: A limiting groove (11) is provided on a side of the limiting cover (10) close to the cylinder cover (20), the limiting groove (11) abuts against a first end surface (22) of the cylinder cover (20), a limiting portion (12) is provided in the limiting groove (11), and the limiting portion (12) is spaced apart from the valve plate (21).

3. The cylinder fixing assembly according to claim 2, characterized in that: The limiting portion (12) is a boss arranged at the center of the bottom wall of the limiting groove (11).

4. The cylinder fixing assembly according to claim 1, characterized in that: The outer peripheral side of the limiting cover (10) is provided with threads, and the limiting cover (10) and the air pump (00) are threadedly connected.

5. The cylinder fixing assembly according to claim 1, characterized in that: A mounting groove (13) for mounting the limiting cover (10) is provided on a side of the limiting cover (10) away from the cylinder cover (20).

6. The cylinder fixing assembly according to claim 5, characterized in that: The cross section of the installation groove (13) along the radial direction of the limiting cover (10) is a regular hexagon.

7. The cylinder fixing assembly according to claim 1, characterized in that: The first end surface (22) of the cylinder head (20) is provided with a penetrating gas passage (26), and the gas passage (26) is used to transport gas to the first end surface (22).

8. The cylinder fixing assembly according to claim 1, characterized in that: The valve plate (21) is in close contact with the first end surface (22), and based on the fact that the pressure in the gas channel is greater than the pressure outside the valve plate, the valve plate (21) is elastically deformed to move away from the first end surface (22).

9. The cylinder fixing assembly according to claim 5, characterized in that: The valve plate (21) is provided with a connection hole (211), and the cylinder cover (20) further comprises a fastener (23), wherein the fastener (23) passes through the connection hole (211) and is connected and fixed to the cylinder cover (20).

10. The cylinder fixing assembly according to claim 1, characterized in that: The first end surface (22) of the cylinder cover (20) is provided with a plurality of positioning bosses (24) arranged at intervals, and two adjacent positioning bosses (24) form an air flow channel (241).

11. The cylinder fixing assembly according to claim 1, characterized in that: The cylinder cover (20) also has a second end face (28) opposite to the first end face (22), and the second end face (28) is provided with a matching groove (29), the bottom wall of the matching groove (29) abuts against the cylinder body (30), and the inner peripheral wall of the matching groove (29) is interference fit with the outer peripheral wall of the cylinder body (30).

12. The cylinder fixing assembly according to claim 11, characterized in that: The outer peripheral wall of the cylinder body (30) is provided with a sealing groove (31), a sealing member (32) is provided in the sealing groove (31), and the sealing member (32) is in abutment with the inner peripheral wall of the matching groove (29).

13. An air pump, characterized in that: Comprising the cylinder fixing assembly according to any one of claims 1 to 12.

14. An air suspension, characterized in that: It comprises an elastic element and an air pump (00) as claimed in claim 13, wherein the air pump (00) is used to compress the elastic element.

15. A vehicle, characterized in that: The vehicle comprises an axle, a frame and the air suspension as claimed in claim 14, wherein the air suspension is used to connect the axle and the frame.

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