Air spring device and vehicle

Abstract

An air spring device and a vehicle. The air spring device includes an end cover assembly, a piston body and a bladder. The two ends of the bladder are respectively connected to the end cover assembly and the piston body, so that a working chamber for containing gas is formed between the end cover assembly and the piston body. The end cover assembly includes an annular metal support cover and an annular plastic support cover, the annular plastic support cover surrounds at least part of the outer side wall of the annular metal support cover, and the surface where the annular plastic support cover and the annular metal support cover contact each other includes a contact surface, and the contact surface includes a plurality of contact edges. The end cover assembly also includes a vulcanized rubber member, the vulcanized rubber member covers at least one of the plurality of contact edges, and at the at least one contact edge, the vulcanized rubber member is respectively connected to the annular metal support cover and the annular plastic support cover to seal the at least one contact edge. Thereby, the air tightness of the end cover assembly at the position where the annular plastic support cover and the annular metal support cover contact each other is ensured.

Description

Technical Field

[0001] The embodiments of the utility model relate to an air spring device and a vehicle. Background Art

[0002] The air spring device is a sealed container filled with compressed air, which uses the compressibility of gas to achieve its elastic effect. The air spring device can be used in the vehicle's shock absorption system, and has ideal nonlinear elastic characteristics. After the height adjustment device is installed, the vehicle height does not change with the increase or decrease of the load, the spring stiffness can be designed to be lower, and the ride comfort is good. Utility Model Content

[0003] At least one embodiment of the utility model provides an air spring device, comprising: an end cover assembly, a piston body, which is arranged opposite to the end cover assembly in the axial direction of the piston body, and a bladder, wherein the bladder is cylindrical, one end of the bladder is connected to the end cover assembly, and the other end of the bladder is connected to the piston body, so that a working chamber for accommodating gas is formed between the end cover assembly and the piston body, the end cover assembly comprises an annular metal support cover and an annular plastic support cover, the annular plastic support cover surrounds at least part of the outer side wall of the annular metal support cover, the surface where the annular plastic support cover and the annular metal support cover contact each other comprises a contact surface, the contact surface comprises a plurality of contact edges, the end cover assembly also comprises a vulcanized rubber member, the vulcanized rubber member covers at least one contact edge of the plurality of contact edges, and at the at least one contact edge, the vulcanized rubber member is respectively connected to the annular metal support cover and the annular plastic support cover to seal the at least one contact edge.

[0004] For example, in the air spring device provided in one embodiment of the utility model, the vulcanized rubber part is configured to be vulcanized on the at least one contact edge by a vulcanization process, and the vulcanized rubber part is respectively connected to the annular metal support cover and the annular plastic support cover by chemical bonds.

[0005] For example, in the air spring device provided in one embodiment of the present invention, the plurality of contact edges include an external contact edge, the external contact edge is located on the outer side wall of the annular metal support cover, and the vulcanized rubber member covers the external contact edge.

[0006] For example, in an air spring device provided in an embodiment of the present invention, the external contact edge is located at the end of the end cover assembly away from the piston body.

[0007] For example, in the air spring device provided in one embodiment of the present utility model, the annular metal support cover and the annular plastic support cover have a groove at the outer contact edge, and the vulcanized rubber part is located in the groove.

[0008] For example, in an air spring device provided in an embodiment of the present invention, the cross-section of the groove includes at least one of a rectangular shape, a trapezoidal shape, a V shape, and a U shape.

[0009] For example, in the air spring device provided in one embodiment of the present invention, the shape of the vulcanized rubber piece includes a closed ring.

[0010] For example, in the air spring device provided in one embodiment of the utility model, the end cover assembly also includes a shock-absorbing sealing assembly and a first sealing ring, the shock-absorbing sealing assembly is sleeved in the annular metal support cover, the first sealing ring is sleeved on the outer side wall of the shock-absorbing sealing assembly, and the first sealing ring is in contact with and cooperates with the inner side wall of the annular metal support cover.

[0011] For example, in the air spring device provided in one embodiment of the utility model, the annular plastic support cover also surrounds at least part of the inner wall of the annular metal support cover, and the end cover assembly also includes a second sealing ring, which is sleeved on the outer wall of the shock-absorbing sealing assembly, and the second sealing ring is in contact with and cooperates with the inner wall of the annular plastic support cover surrounding at least part of the inner wall.

[0012] For example, in an air spring device provided in an embodiment of the present invention, the end cover assembly further includes a control valve, the annular plastic support cover includes an installation chamber, the control valve is located in the installation chamber, and the installation chamber includes an installation opening so that the control valve can be installed from the installation opening into the installation chamber.

[0013] The control valve includes a shell, the shell includes a supporting shoulder, the outer circumferential radial dimension of the supporting shoulder is larger than the outer circumferential radial dimension of a portion of the shell located on a side of the supporting shoulder close to the mounting opening, the end cover assembly also includes a metal gasket and an elastic gasket, along the axial direction of the control valve, the metal gasket is located on a side of the supporting shoulder close to the mounting opening, the elastic gasket is located between the metal gasket and the supporting shoulder, and along the axial direction of the control valve, the metal gasket and the elastic gasket both overlap with the supporting shoulder, the end cover assembly also includes an axial clamping piece, the axial clamping piece is configured to apply a force along the axial direction of the control valve to the metal gasket so as to press the elastic gasket against the supporting shoulder and fix the control valve in the axial direction of the control valve in the mounting chamber.

[0014] For example, in the air spring device provided in one embodiment of the present utility model, the elastic gasket is fitted with the supporting shoulder, the metal gasket is fitted with the elastic gasket, and the axial pressing piece is fitted with the metal gasket.

[0015] For example, in the air spring device provided in one embodiment of the utility model, the elastic gasket and the metal gasket are both annular in shape, the inner diameters of the elastic gasket and the metal gasket are approximately equal, the outer diameter of the elastic gasket is not smaller than the outer diameter of the support shoulder, and the outer diameter of the metal gasket is not smaller than the outer diameter of the elastic gasket.

[0016] For example, in the air spring device provided in an embodiment of the present invention, along the axial direction of the control valve, the size of the metal gasket is not less than the size of the elastic gasket.

[0017] For example, in the air spring device provided in one embodiment of the present invention, the metal gasket and the elastic gasket are integrally formed.

[0018] For example, in an air spring device provided in one embodiment of the utility model, the axial clamping member includes a retaining ring, the inner wall of the installation chamber includes an annular groove, part of the retaining ring is located in the annular groove, and along the axial direction of the control valve, the retaining ring overlaps with the metal gasket.

[0019] For example, in an air spring device provided in an embodiment of the present invention, the end cover assembly further includes a third sealing ring, the third sealing ring is sleeved on the outer wall of the shell, and the third sealing ring is in contact with the inner wall of the installation chamber.

[0020] At least one embodiment of the utility model provides a vehicle, comprising any of the above-mentioned air spring devices.

[0021] The end cover assembly of the air spring device provided by the embodiment of the utility model includes an annular metal support cover and an annular plastic support cover. The surface where the annular metal support cover and the annular plastic support cover contact each other is a contact surface. At least one contact edge of the contact surface is covered with a vulcanized rubber part, and the annular metal support cover and the annular plastic support cover are connected at the at least one contact edge to seal the at least one contact edge, which can prevent the gas in the working chamber from leaking out through the gap between the annular plastic support cover and the annular metal support cover, thereby ensuring the air tightness of the end cover assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present utility model, rather than limiting the present utility model.

[0023] Figure 1 A partial cross-sectional schematic diagram of an air spring device provided in an embodiment of the utility model;

[0024] Figure 2for Figure 1 A top view of the end cover assembly;

[0025] Figure 3 for Figure 2 A cross-sectional view along the cutting line AA;

[0026] Figure 4 for Figure 2 Another cross-sectional view along the cutting line AA; and

[0027] Figure 5 for Figure 1 Section view along cutting line BB. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0030] Unless otherwise defined, the features such as "parallel", "perpendicular" and "same" used in the embodiments of the present invention include the situations of "parallel", "perpendicular", "same" in a strict sense, as well as the situations of "approximately parallel", "approximately perpendicular", "approximately the same" and the like that contain a certain error. For example, the above-mentioned "approximately" may indicate that the difference of the compared objects is within 10% or 5% of the average value of the compared objects. When the number of a component or element is not specifically indicated in the following of the embodiments of the present invention, it means that the component or element may be one or more, or may be understood as at least one. "At least one" means one or more, and "more than one" means at least two.

[0031] The embodiment of the utility model provides an air spring device, a manufacturing method thereof and a vehicle. The air spring device includes an end cover assembly, a piston body and a bladder. In the axial direction of the piston body, the piston body and the end cover assembly are arranged opposite to each other. The bladder is cylindrical, one end of the bladder is connected to the end cover assembly, and the other end of the bladder is connected to the piston body, so that a working chamber for accommodating gas is formed between the end cover assembly and the piston body. The end cover assembly includes an annular metal support cover and an annular plastic support cover, the annular plastic support cover surrounds at least part of the outer side wall of the annular metal support cover, and the surface where the annular plastic support cover and the annular metal support cover contact each other includes a contact surface, and the contact surface includes a plurality of contact edges. The end cover assembly also includes a vulcanized rubber member, the vulcanized rubber member covers at least one contact edge among the plurality of contact edges, and at the at least one contact edge, the vulcanized rubber member is respectively connected to the annular metal support cover and the annular plastic support cover to seal the at least one contact edge.

[0032] In the air spring device provided in the embodiment of the utility model, the end cover assembly includes an annular metal support cover and an annular plastic support cover, the annular metal support cover can ensure the strength of the end cover assembly, and the annular plastic support cover can achieve the lightweight of the end cover assembly. This kind of plastic parts and metal parts are formed into an integrated structure through injection molding process, etc., and the formed component can have the advantages of good strength of metal and light weight of plastic. However, the inventor of the utility model found that when using such a plastic and metal combined component in the end cover of the air spring, the interface between the plastic and the metal may cause leakage and other unreliable problems.

[0033] By covering at least one of the multiple contact edges with a vulcanized rubber piece, and connecting the vulcanized rubber piece with the annular metal support cover and the annular plastic support cover at the position of the covered contact edge to seal the at least one contact edge, the gas in the working chamber can be prevented from leaking out through the gap between the annular plastic support cover and the annular metal support cover, thereby ensuring the air tightness of the end cover assembly and the performance of the air spring device. In addition, at the at least one contact edge, the vulcanized rubber piece is connected with the annular metal support cover and the annular plastic support cover to seal the at least one contact edge, thereby improving the air tightness of the annular plastic support cover and the annular metal support cover at the at least one contact edge, so that the vulcanized rubber piece, the annular metal support cover and the annular plastic support cover become a whole. Compared with other sealing structures, there is no need to consider the size matching between the three, and there is no need to add an additional fixing structure of the vulcanized rubber piece, etc., so that the sealing form of the vulcanized rubber piece is simpler and more reliable.

[0034] The air spring device and the manufacturing method thereof and the vehicle provided by the embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0035] The utility model embodiment provides an air spring device. Figure 1A partial cross-sectional schematic diagram of an air spring device provided in an embodiment of the utility model; Figure 2 for Figure 1 A top view of the end cover assembly; Figure 3 for Figure 2 A sectional view along the cutting line AA. Figures 1 to 3 As shown, the air spring device 100 includes an end cover assembly 110, a piston body 120 and a bladder 130. In the axial direction X1 of the piston body 120, the piston body 120 and the end cover assembly 110 are arranged opposite to each other. The bladder 130 is cylindrical, one end of the bladder 130 is connected to the end cover assembly 110, and the other end of the bladder 130 is connected to the piston body 120, so that a working chamber V0 for accommodating gas is formed between the end cover assembly 110 and the piston body 120. The end cover assembly 110 includes an annular metal support cover 111 and an annular plastic support cover 112, the annular plastic support cover 112 surrounds at least part of the outer side wall of the annular metal support cover 111, and the surface where the annular plastic support cover 112 and the annular metal support cover 111 contact each other includes a contact surface 140, and the contact surface 140 includes a plurality of contact edges 141. The end cover assembly 110 also includes a vulcanized rubber member 114, which covers at least one contact edge among the multiple contact edges 141, and at the at least one contact edge, the vulcanized rubber member 114 is respectively connected to the annular metal support cover 111 and the annular plastic support cover 112 to seal the at least one contact edge. Figure 3 The schematic diagram shows that the contact surface 140 includes two contact edges 141, and the two contact edges 141 are contact edge 141a and contact edge 141b. For example, the contact edge 141a and the contact edge 141b are both annular. Figure 3 It is schematically shown that the contact edge 141 a is located on the outer side of the annular metal support cover 111 , and the contact edge 141 b is located on the inner side of the annular metal support cover 111 .

[0036] In the air spring device provided in the embodiment of the utility model, the end cover assembly includes an annular metal support cover and an annular plastic support cover. The annular metal support cover can ensure the strength of the end cover assembly, and the annular plastic support cover can achieve lightweight end cover assembly.

[0037] Due to the manufacturing error, size error, etc. of the annular plastic support cover or the annular metal support cover, the two cannot fit completely, and the gas in the working chamber leaks out through the gap where the two contact each other, affecting the performance of the air spring device. The surface where the annular plastic support cover and the annular metal support cover contact each other is the contact surface, and the contact surface includes a plurality of contact edges. It should be noted that although the annular metal support cover is generally annular in structure, its wall thickness may be uneven at different positions, and there may be one or more protrusions or depressions on the outer wall or inner wall of the annular structure. Therefore, the contact surface formed by the contact between the annular plastic support cover and the annular metal support cover may also be a more complex shape. For example, the annular plastic support cover may only cover the outer wall of the annular metal support cover, in which case two contact edges are formed, both of which are located on the outer side of the annular metal support cover and are separated from each other in the axial direction. Alternatively, the annular plastic support cover not only covers the outer wall of the annular metal support cover, but also may cover at least a portion of the inner wall of the annular metal support cover, in which case one of the two contact edges is located on the outer side of the annular metal support cover, and one contact edge is located on the inner side of the annular metal support cover.

[0038] For example, each contact edge is an annular structure. It should be noted that the annular structure in the embodiment of the utility model is not limited to a circular ring, and can be an annular structure in any form.

[0039] By covering at least one of the multiple contact edges with a vulcanized rubber piece, and connecting the vulcanized rubber piece with the annular metal support cover and the annular plastic support cover at the position of the covered contact edge to seal the at least one contact edge, the gas in the working chamber can be prevented from leaking out through the gap between the annular plastic support cover and the annular metal support cover, thereby ensuring the air tightness of the end cover assembly and the performance of the air spring device. In addition, at the at least one contact edge, the vulcanized rubber piece is connected with the annular metal support cover and the annular plastic support cover to seal the at least one contact edge, thereby ensuring the air tightness of the annular plastic support cover and the annular metal support cover at the at least one contact edge, so that the vulcanized rubber piece, the annular metal support cover and the annular plastic support cover become a whole. Compared with other sealing structures, there is no need to consider the size matching between the three, and there is no need to add an additional fixing structure of the vulcanized rubber piece, etc., so that the sealing form of the vulcanized rubber piece is simpler and more reliable.

[0040] The air tightness of the air spring device is an important factor affecting the performance of the air spring device. In the utility model, the air leakage at the contact point between the annular metal support cover and the annular plastic support cover of the end cover assembly is easily overlooked, and the impact on the air tightness of the air spring cannot be obviously discovered. During the design process of the end cover assembly, the inventor of the utility model covered the contact edges of the annular metal support cover and the annular plastic support cover, thereby improving the air tightness of the end cover assembly and ensuring the performance of the air spring device.

[0041] For example, the end cover assembly may further include a vulcanized rubber member covering the contact edge 141 b , thereby better ensuring the air tightness of the end cover assembly 110 .

[0042] In some examples, the vulcanized rubber part is configured to be vulcanized on at least one contact edge by a vulcanization process, and the vulcanized rubber part is connected to the annular metal support cover and the annular plastic support cover respectively by chemical bonds. When the vulcanized rubber part covers at least one contact edge by the vulcanization process, the vulcanized rubber part is also connected to the annular metal support cover and the annular plastic support cover by chemical bonds, thereby ensuring the airtightness of the annular plastic support cover and the annular metal support cover on the at least one contact edge, so that the vulcanized rubber part, the annular metal support cover and the annular plastic support cover become a whole. Compared with other sealing forms, the vulcanization process is simpler, and the vulcanized rubber part is installed and fixed after the vulcanization process is completed, and there is no need to add an additional fixing structure and installation process to the vulcanized rubber part.

[0043] In some examples, such as Figure 3 As shown, the contact edge 141a is the external contact edge 141a, which is located on the outer side wall of the annular metal support cover 111, and the vulcanized rubber member 114 covers the external contact edge 141a. By making the vulcanized rubber member 114 cover the external contact edge 141a, the gas in the working chamber V0 can be prevented from leaking out through the gap between the annular plastic support cover 112 and the annular metal support cover 111.

[0044] There may be micro cracks in a local area of ​​the annular plastic support cover 112. For example, the local area may be a stress concentration area or a thin area of ​​the annular plastic support cover 112. The gas in the working chamber V0 may penetrate through the micro cracks to the interface between the annular plastic support cover 112 and the annular metal support cover 111, and then leak out through the gap at the external contact edge 141a. By making the vulcanized rubber part 114 cover the external contact edge 141a, the leakage of the above gas can be avoided, the terminal of the gas leakage path is covered, the leakage of the gas is effectively avoided, and the airtightness of the end cover assembly 110 is ensured.

[0045] In addition, by making the vulcanized rubber part 114 cover the external contact edge 141a, it is also possible to facilitate product quality inspection and after-sales maintenance.

[0046] In some examples, such as Figure 3 As shown, the external contact edge 141a is located at the end of the end cap assembly 110 away from the piston body 120. For example, Figure 3 The up and down direction of the structure shown is Figure 1 The up and down directions of the structure shown are just opposite. Thus, the vulcanized rubber part can be easily covered on the external contact edge, which is convenient for product quality inspection and after-sales maintenance.

[0047] In some examples, such as Figure 3 As shown, the annular metal support cover 111 and the annular plastic support cover 112 have a groove 150 at the external contact edge 141a, and at least a portion of the vulcanized rubber part 114 is located in the groove 150. The embodiment of the utility model schematically shows that the annular metal support cover 111 and the annular plastic support cover 112 are both recessed at the external contact edge 141a to form the groove 150. Such a configuration can make the vulcanized rubber part 114 better cover the vulcanized rubber part 114, and better ensure the sealing performance.

[0048] In some examples, such as Figure 3 As shown, the annular metal support cover 111 includes a first end face 1110 away from the piston body 120, and the annular plastic support cover 112 includes a second end face 1120 away from the piston body 120, and the first end face 1110 and the second end face 1120 are flush. The first end face 1110 includes a first concave surface 1110a, and the second end face 1120 includes a second concave surface 1120a. The first concave surface 1110a and the second concave surface 1120a form a groove 150, and the external contact edge 141a is located in the groove 150, and the vulcanized rubber member 114 is located in the groove 150. Therefore, the vulcanized rubber member 114 can be better and more easily formed in the groove 150 where the concave surface is located, and the vulcanized rubber member 114 can better cover the external contact edge 141a, and more stably connect the annular plastic support cover 112 and the annular metal support cover 111 at the external contact edge 141a.

[0049] In some examples, the vulcanized rubber part is completely located in the groove, thereby preventing the vulcanized rubber part from leaking out of the groove, preventing other structures from wearing or damaging the vulcanized rubber part, and preventing the vulcanized rubber part from affecting other structures.

[0050] For example, Figure 3 As shown, the cross-section of the groove 150 is a rectangle. The embodiment of the utility model does not limit the shape of the cross-section of the groove, for example, the cross-section of the groove may also be a trapezoid, a V-shape or a U-shape.

[0051] In some examples, such as Figure 3 As shown, the first end face 1110 and the second end face 1120 are on the same plane, and the outer surface of the vulcanized rubber member 141 away from the piston body 120 is flush with the first end face 1110 and the second end face 1120. Therefore, the vulcanized rubber member 114 can be more conveniently and stably connected with the annular plastic support cover 112 and the annular metal support cover 111 at the external contact edge 141a. In addition, the vulcanized rubber member can be prevented from leaking out of the groove, and other structures can be prevented from causing wear or damage to the vulcanized rubber member, and the vulcanized rubber member can also be prevented from affecting other external structures.

[0052] In some examples, such as Figure 3 As shown, normal lines of the first end surface 1110 and the second end surface 1120 are substantially parallel to the axis of the end cap assembly 110 .

[0053] In some examples, such as Figure 2 As shown, the shape of the vulcanized rubber part 114 includes a closed ring. Therefore, the sealing between the annular plastic support cover 112 and the annular metal support cover 111 can be better ensured. The embodiment of the utility model does not limit the shape of the vulcanized rubber part 114, and can be specifically designed according to the shape of the contact edge of the contact surface. For example, if the contact edge of the contact surface is C-shaped, the shape of the corresponding vulcanized rubber part includes C-shape.

[0054] In some examples, such as Figure 3 As shown, the end cover assembly 110 further includes a shock-absorbing seal component 113 and a first seal ring O1, the shock-absorbing seal component 113 is sleeved in the annular metal support cover 111, the first seal ring O1 is sleeved on the outer side wall of the shock-absorbing seal component 113, and the first seal ring O1 is in contact with the inner side wall of the annular metal support cover 111. Therefore, the first seal ring O1 can ensure the sealing between the shock-absorbing seal component 113 and the annular metal support cover 111, and ensure the performance of the air spring device 100.

[0055] For example, Figure 3 As shown, the outer wall of the shock-absorbing seal assembly 113 includes a limiting groove 113a, and the first sealing ring O1 is located in the limiting groove 113a. Therefore, the positional relationship between the first sealing ring O1 and the shock-absorbing seal assembly 113 can be ensured, and the sealing between the two can be ensured.

[0056] In some examples, such as Figure 3 As shown, the annular plastic support cover 112 surrounds at least a portion of the inner side wall of the annular metal support cover 111 .

[0057] In some examples, such as Figure 3As shown, the end cap assembly 110 further includes a second sealing ring O2, which is sleeved on the outer side wall of the shock-absorbing sealing assembly 113, and the second sealing ring O2 is in contact with the inner side wall of the annular plastic support cover 112 that surrounds at least part of the inner side wall. Thus, the second sealing ring O2 can ensure the airtightness between the shock-absorbing sealing assembly 113 and the annular plastic support cover 112, avoid the airtightness between the shock-absorbing sealing assembly 113 and the annular plastic support cover 112 being affected by the manufacturing error, dimensional error, etc. of the annular plastic support cover 112, and ensure the performance of the air spring device 100.

[0058] For example, Figure 3 As shown, the outer wall of the shock-absorbing seal assembly 113 includes a limiting groove 113b, and the second sealing ring O2 is located in the limiting groove 113b. Thus, the positional relationship between the second sealing ring O2 and the shock-absorbing seal assembly 113 can be ensured, and the sealing between the two can be ensured.

[0059] Figure 4 for Figure 2 Another cross-sectional view along the cutting line AA. Figure 4 As shown, the end cover assembly 110 includes an annular metal support cover 111 and an annular plastic support cover 112, and the annular plastic support cover 112 surrounds at least part of the outer side wall of the annular metal support cover 111. For example, the annular plastic support cover 112 can also surround at least part of the end surface 1111 of the annular metal support cover 111 close to the working chamber V0. Of course, the embodiment of the utility model is not limited to this.

[0060] By providing the vulcanized rubber part 114, the sealing performance between the annular metal support cover 111 and the annular plastic support cover 112 can be well ensured. Thus, the structural design of the annular metal support cover 111 and the annular plastic support cover 112 can be simplified, making the structure of the end cover assembly 110 simpler. For example, the annular plastic support cover 112 can only surround at least part of the outer side wall of the annular metal support cover 111. For example, the contact area between the annular metal support cover 111 and the annular plastic support cover 112 can be simplified as much as possible, making the structure of the end cover assembly 110 simpler.

[0061] Figure 5 for Figure 1 Section view along the cutting line BB. Figure 1 and Figure 5As shown, the end cover assembly 110 further includes a control valve 115, the annular plastic support cover 112 includes a mounting chamber 1121, the control valve 115 is located in the mounting chamber 1121, and the mounting chamber 1121 includes a mounting opening 1121a so that the control valve 115 is installed from the mounting opening 1121a into the mounting chamber 1121. The control valve 115 includes a housing 1150, and the housing 1150 includes a supporting shoulder 1150a, and the outer circumferential radial dimension of the supporting shoulder 1150a is greater than the outer circumferential radial dimension of the portion of the housing 1150 located on the side of the supporting shoulder 1150a close to the mounting opening 1121a. The end cover assembly 110 further includes a metal gasket 116 and an elastic gasket 117. The metal gasket 116 is located on a side of the support shoulder 1150a close to the mounting opening 1121a along the axial direction X2 of the control valve 115. The elastic gasket 117 is located between the metal gasket 116 and the support shoulder 1150a. In addition, the metal gasket 116 and the elastic gasket 117 overlap with the support shoulder 1150a along the axial direction X2 of the control valve 115. The end cover assembly 110 further includes an axial pressing member 118, which is configured to apply a force along the axial direction X2 of the control valve 115 to the metal gasket 116 to press the elastic gasket 117 against the support shoulder 1150a and fix the control valve 115 in the mounting chamber 1121 along the axial direction X2 of the control valve 115.

[0062] The elastic gasket can absorb the dimensional error of the control valve in the axial direction, avoid the shaking of the control valve in the installation chamber along the axial direction, avoid the influence of the improper installation of the control valve on the performance of the air spring device, and avoid the abnormal noise caused by shaking. The elastic gasket is arranged on the side of the support shoulder close to the installation opening, which can also facilitate the installation of the elastic gasket to ensure that the elastic gasket is installed in place and play a role in absorbing dimensional errors. For example, the elastic gasket can also be located between the metal gasket and the axial clamping member.

[0063] In some examples, such as Figure 5 As shown, the elastic gasket 117 is fitted with the supporting shoulder 1150a, the metal gasket 116 is fitted with the elastic gasket 117, and the axial pressing piece 118 is fitted with the metal gasket 116. Such an arrangement facilitates the installation of the elastic gasket 117, the metal gasket 116 and the axial pressing piece 118.

[0064] In some examples, such as Figure 5As shown, the elastic gasket 117 and the metal gasket 116 are both annular in shape, the inner diameters of the elastic gasket 117 and the metal gasket 116 are substantially equal, the outer diameter of the elastic gasket 117 is not less than the outer diameter of the supporting shoulder 1150a, and the outer diameter of the metal gasket 116 is not less than the outer diameter of the elastic gasket 117. Thus, in the axial direction X12 of the control valve 115, the metal gasket 116 and the elastic gasket 117 have a larger contact area, and the elastic gasket 117 and the supporting shoulder 1150a have a larger contact area. When the metal gasket 116 presses the elastic gasket 117 against the supporting shoulder 1150a, the elastic gasket 117 can be better elastically deformed to better absorb the dimensional error.

[0065] In some examples, such as Figure 5 As shown, along the axial direction X2 of the control valve 115, the size of the metal gasket 116 is not less than the size of the elastic gasket 117. Therefore, when the metal gasket 116 can better press the elastic gasket 117 against the support shoulder 1150a, the elastic gasket 117 can better elastically deform to better absorb the size error.

[0066] In some examples, such as Figure 5 As shown, the metal gasket 116 and the elastic gasket 117 are integrally formed, so that the installation of the metal gasket 116 and the elastic gasket 117 is facilitated, and the installation efficiency is improved.

[0067] In some examples, such as Figure 5 As shown, the axial clamping member 118 includes a clamping ring, and the inner side wall of the installation chamber 1121 includes an annular groove 1121b. Part of the clamping ring is located in the annular groove 1121b. Along the axial direction X12 of the control valve 115, the clamping ring overlaps with the metal gasket 116. By restricting the clamping ring in the annular groove 1121b, the metal gasket 116, the elastic gasket 117 and the control valve 115 can be simply and reliably limited. Of course, the embodiment of the utility model does not limit the structure of the axial clamping member 118. For example, the axial clamping member 118 can also be a screw connection or a clamping member.

[0068] In some examples, such as Figure 5 As shown, the end cover assembly 110 further includes a third sealing ring O3, which is sleeved on the outer wall of the housing 1150, and the third sealing ring O3 is in contact with the inner wall of the installation chamber 1121. Thus, the control valve 115 can be firmly fixed in the installation chamber 1121 in the radial direction thereof, and the control valve 115 is prevented from shaking in the radial direction thereof.

[0069] The embodiment of the utility model further provides a vehicle. The vehicle includes the air spring device of any of the above embodiments. For example, the air spring device can be used in the suspension system of the vehicle. The air spring device can be connected to other components in the vehicle in various conventional connection methods, which will not be described in detail here. Since the vehicle according to the embodiment of the utility model adopts the above air spring device, the vehicle can also obtain various technical effects brought by the above air spring device, which will not be described in detail here.

[0070] The embodiment of the utility model also provides a method for manufacturing an air spring device. The air spring device includes an end cover assembly, the end cover assembly includes an annular metal support cover and an annular plastic support cover, the annular plastic support cover surrounds at least part of the outer side wall of the annular metal support cover, the surface where the annular plastic support cover and the annular metal support cover contact each other includes a contact surface, the contact surface includes a plurality of contact edges, the end cover assembly also includes a vulcanized rubber part, and the method for manufacturing the air spring device includes: vulcanizing the vulcanized rubber part on at least one contact edge using a vulcanization process. The vulcanized rubber part covers at least one contact edge, and at the at least one contact edge, the vulcanized rubber part is respectively connected to the annular metal support cover and the annular plastic support cover to seal the at least one contact edge.

[0071] Due to manufacturing errors, dimensional errors, etc. of the annular plastic support cover or the annular metal support cover, the two cannot fit completely together, and the gas in the working chamber leaks out through the gap where the two contact each other, affecting the performance of the air spring device. The surface where the annular plastic support cover and the annular metal support cover contact each other is a contact surface, and the contact surface includes multiple contact edges. When the vulcanized rubber part is vulcanized on at least one contact edge by a vulcanization process, the vulcanized rubber part is also connected to the annular metal support cover and the annular plastic support cover at the same time, ensuring the air tightness of the annular plastic support cover and the annular metal support cover on the at least one contact edge, so that the vulcanized rubber part, the annular metal support cover and the annular plastic support cover become a whole. Compared with other sealing forms, the vulcanization process is simpler, and the vulcanized rubber part is installed and fixed after the vulcanization process is completed, and there is no need to add additional fixing structure and installation process to the vulcanized rubber part.

[0072] In some examples, the plurality of contact edges include an outer contact edge, and the outer contact edge is located on the outer side wall of the annular metal support cover. For example, a vulcanized rubber member is vulcanized on the outer contact edge by a vulcanization process.

[0073] There are a few points to note:

[0074] (1) In the drawings of the embodiments of the present invention, only the structures related to the embodiments of the present invention are involved, and other structures can refer to the general design.

[0075] (2) In the absence of conflict, the features of the same embodiment and different embodiments of the present invention may be combined with each other.

[0076] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An air spring device, characterized in that: include: End cover assembly, The piston body is arranged opposite to the end cover assembly in the axial direction of the piston body, The bladder is cylindrical, one end of the bladder is connected to the end cover assembly, and the other end of the bladder is connected to the piston body, so that a working chamber for containing gas is formed between the end cover assembly and the piston body. The end cover assembly includes an annular metal support cover and an annular plastic support cover, wherein the annular plastic support cover surrounds at least a portion of the outer side wall of the annular metal support cover, and the surface where the annular plastic support cover and the annular metal support cover contact each other includes a contact surface, and the contact surface includes a plurality of contact edges. The end cover assembly also includes a vulcanized rubber member, which covers at least one contact edge among the multiple contact edges, and at the at least one contact edge, the vulcanized rubber member is respectively connected to the annular metal support cover and the annular plastic support cover to seal the at least one contact edge.

2. The air spring device according to claim 1, characterized in that: The vulcanized rubber component is configured to be vulcanized on the at least one contact edge by using a vulcanization process, and the vulcanized rubber component is connected to the annular metal support cover and the annular plastic support cover respectively through chemical bonds.

3. The air spring device according to claim 1, wherein: The plurality of contact edges include an external contact edge, the external contact edge is located on the outer side wall of the annular metal support cover, and the vulcanized rubber member covers the external contact edge.

4. The air spring device according to claim 3, characterized in that: The external contact edge is located at the end of the end cover assembly away from the piston body.

5. The air spring device according to claim 3, characterized in that: The annular metal support cover and the annular plastic support cover have a groove at the outer contact edge, and the vulcanized rubber part is located in the groove.

6. The air spring device according to claim 5, characterized in that: The cross-section of the groove includes at least one of a rectangular shape, a trapezoidal shape, a V shape, and a U shape.

7. The air spring device according to claim 1, characterized in that: The shape of the vulcanized rubber piece includes a closed ring.

8. The air spring device according to any one of claims 1 to 7, characterized in that: The end cover assembly also includes a shock-absorbing sealing component and a first sealing ring. The shock-absorbing sealing component is sleeved in the annular metal support cover, the first sealing ring is sleeved on the outer side wall of the shock-absorbing sealing component, and the first sealing ring is in contact with the inner side wall of the annular metal support cover.

9. The air spring device according to claim 8, characterized in that: The annular plastic support cover also surrounds at least part of the inner wall of the annular metal support cover, and the end cover assembly also includes a second sealing ring, which is sleeved on the outer wall of the shock-absorbing sealing assembly, and the second sealing ring is in contact with and cooperates with the inner wall of the annular plastic support cover surrounding at least part of the inner wall.

10. The air spring device according to any one of claims 1 to 7, characterized in that: The end cover assembly further includes a control valve, the annular plastic support cover includes an installation chamber, the control valve is located in the installation chamber, and the installation chamber includes an installation opening so that the control valve can be installed from the installation opening into the installation chamber. The control valve comprises a housing, the housing comprises a support shoulder, the outer circumferential radial dimension of the support shoulder is larger than the outer circumferential radial dimension of a portion of the housing located on a side of the support shoulder close to the mounting opening, The end cover assembly further includes a metal gasket and an elastic gasket. Along the axial direction of the control valve, the metal gasket is located on a side of the support shoulder close to the mounting opening, the elastic gasket is located between the metal gasket and the support shoulder, and along the axial direction of the control valve, the metal gasket and the elastic gasket both overlap with the support shoulder. The end cover assembly further includes an axial pressing member configured to apply a force along the axial direction of the control valve to the metal gasket to press the elastic gasket against the support shoulder and fix the control valve in the axial direction of the control valve within the mounting chamber.

11. The air spring device according to claim 10, characterized in that The elastic gasket is fitted with the supporting shoulder, the metal gasket is fitted with the elastic gasket, and the axial pressing piece is fitted with the metal gasket.

12. The air spring device according to claim 10, wherein: The elastic gasket and the metal gasket are both annular in shape, have substantially equal inner diameters, the outer diameter of the elastic gasket is not less than the outer diameter of the supporting shoulder, and the outer diameter of the metal gasket is not less than the outer diameter of the elastic gasket.

13. The air spring device according to claim 10, characterized in that Along the axial direction of the control valve, the size of the metal gasket is not less than the size of the elastic gasket.

14. The air spring device according to claim 10, characterized in that The metal gasket and the elastic gasket are integrally formed.

15. The air spring device according to claim 10, characterized in that: The axial pressing member includes a clamping ring, the inner side wall of the installation chamber includes an annular groove, a portion of the clamping ring is located in the annular groove, and along the axial direction of the control valve, the clamping ring overlaps with the metal gasket.

16. The air spring device according to claim 10, characterized in that The end cover assembly also includes a third sealing ring, which is sleeved on the outer side wall of the shell and contacts and cooperates with the inner side wall of the installation chamber.

17. A vehicle, characterized in that: Comprising an air spring device according to any one of claims 1-16.

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