An air spring

Abstract

The utility model discloses an air spring, include: dust cover, dust cover extends along the first direction, is equipped with the cavity, and dust cover includes the first deformation part and the second deformation part of being connected, the protection cylinder, the protection cylinder is located in the cavity, and the inner wall of protection cylinder and the first deformation part abuts, along the second direction, and the protection cylinder is spaced apart and set up with the second deformation part, wherein, the first direction and the second direction are perpendicular to each other. The utility model can solve the prior art dust cover size is bigger, leads to the air spring unable to adapt to the scene of smaller installation space.

Description

Technical Field

[0001] This utility model relates to the field of automotive air springs, and in particular to an air spring. Background Technology

[0002] An air spring is a new type of spring that utilizes the elasticity of air within a retractable, sealed container. It exhibits ideal non-linear elastic characteristics and, in automotive suspension systems, possesses a wide damping range and excellent durability, leading to its increasing use in modern vehicles. As a crucial component of the vehicle suspension system, air springs are frequently exposed to complex and harsh road conditions and environments, making them susceptible to intrusion of dust, mud, and other impurities, which can cause malfunctions or damage. To ensure their proper functioning and extend their service life, a dedicated dust cover is typically installed on the outside of the air spring to effectively prevent contamination and physical damage.

[0003] Existing dust covers do not contact the internal structure of the air springs and are generally large, making them difficult to adapt to the design requirements of modern vehicles for compact and lightweight suspension systems. Especially in models with limited installation space, such dust covers often cannot be effectively installed and may even interfere with surrounding components, limiting their widespread application in modern automobiles.

[0004] Therefore, there is an urgent need for an air spring design with a small dust cover. Utility Model Content

[0005] The purpose of this invention is to solve the problem that the existing dust cover is too large, which makes the air spring unsuitable for scenarios with limited installation space.

[0006] To solve the above-mentioned technical problems, the present invention discloses an air spring, comprising: a dust cover extending along a first direction and having a cavity, the dust cover including a first deformation part and a second deformation part connected to each other; a protective sleeve disposed in the cavity, the protective sleeve abutting against the inner wall of the first deformation part; the protective sleeve and the second deformation part being spaced apart along a second direction; wherein the first direction and the second direction are perpendicular to each other.

[0007] Using the above technical solution, the dust cover includes a first deformable part and a second deformable part, and the protective sleeve abuts against the inner wall of the first deformable part. That is, at the abutment point between the first deformable part and the protective sleeve, the dimension of the first deformable part in the second direction is smaller than the dimension of the protective sleeve. The protective sleeve and the second deformable part are spaced apart, that is, the dimension of the second deformable part in the second direction is larger than the dimension of the protective sleeve, and they are in a non-contact state with the protective sleeve. When the protective sleeve size is the same, compared with the conventional dust cover of the prior art that does not contact the internal structure of the air spring (e.g., the protective sleeve), in this application, since the dimension of the first deformable part is reduced along the second direction at the abutment point, the space occupied by the dust cover at the abutment point with the protective sleeve is also reduced, making the air spring suitable for a smaller installation space.

[0008] According to another specific embodiment of the present invention, an air spring is disclosed, wherein the first deformable part has an abutting area, and the protective sleeve abuts against the abutting area; along the positive direction of the first direction, the cross-section of the abutting area gradually increases in size in the second direction.

[0009] Using the above technical solution, the casing and the first deformed part abut in the abutment area, and because the cross-section of the abutment area gradually increases in the second direction along the first positive direction, the abutment area forms a one-way lock, and after the casing abuts in the abutment area, it will not move in the opposite direction relative to the abutment area along the first direction.

[0010] According to another specific embodiment of the present invention, an air spring is disclosed, wherein the outer periphery of the protective cylinder is provided with an outwardly protruding flange; the first deformable part is provided with a mounting groove, and the mounting groove is in concave-convex fit with the flange.

[0011] By adopting the above technical solution, an outwardly protruding flange is provided on the outer periphery of the casing, and a matching mounting groove is opened at the corresponding position of the first deformation part. Through the concave-convex cooperation between the mounting groove and the flange, a mechanical interlock is formed, thereby restricting the movement of the casing along the first direction.

[0012] According to another specific embodiment of the present invention, an air spring is disclosed, which further includes: a non-deformable part, which extends along a first direction and is disposed between the first deformable part and the second deformable part; along a second direction, the non-deformable part and the protective cylinder are spaced apart.

[0013] By employing the above technical solution, a non-deformable portion is provided between the first and second deformable portions. This non-deformable portion is a part that does not undergo elastic deformation, thereby enhancing the rigidity of the dust cover and providing support for the adjacent first and second deformable portions, making the dust cover less prone to twisting and deformation. Furthermore, the non-deformable portion is spaced apart from the protective sleeve to avoid contact friction between the protective sleeve and the dust cover.

[0014] According to another specific embodiment of the present invention, an air spring is disclosed, wherein the non-deformable part is an annular structure of equal diameter.

[0015] According to another specific embodiment of the present invention, an air spring is disclosed, which further includes: a fixing ring, which is disposed on the outer periphery of the non-deformable part and is used to fix the non-deformable part and the protective cylinder.

[0016] By adopting the above technical solution, the non-deformable part is fixed to the protective cylinder by setting a fixing ring, which effectively restricts the movement of the protective cylinder relative to the dust cover. Specifically, this includes movement and rotation along the first direction and movement along the second direction, avoiding wear and abnormal noise caused by the relative movement of the protective cylinder, and improving the reliability and durability of the air spring.

[0017] According to another specific embodiment of the present invention, an air spring is disclosed, wherein the non-deformable part is provided with a recess along the outer periphery, and the fixing ring is embedded in the recess.

[0018] By adopting the above technical solution, by providing a recess along the outer periphery of the non-deformable part and embedding the fixing ring in the recess, the installation position of the fixing ring is clearly defined, and the movement of the fixing ring relative to the non-deformable part is more effectively restricted.

[0019] According to another specific embodiment of the present invention, an air spring is disclosed, wherein the first deformable part, the second deformable part, and the non-deformable part are integrally formed.

[0020] By adopting the above technical solution, and by setting the first deformable part, the second deformable part, and the non-deformable part as an integrally formed structure, the splicing gaps are eliminated, the overall sealing performance is improved, and the intrusion of pollutants is effectively prevented.

[0021] According to another specific embodiment of the present invention, an air spring is disclosed, wherein the first deformation part and the second deformation part are made of elastically deformable material.

[0022] Using the above technical solution, the first deformation part and the second deformation part are made of elastically deformable material, that is, the first deformation part and the second deformation part can undergo elastic deformation. Under vibration conditions, the dust cover can adapt to the expansion or contraction of the internal structure of the air spring, and the dust cover can always cover the internal structure of the air spring to prevent pollutants from entering the air spring. Attached Figure Description

[0023] Figure 1 A cross-sectional view of a conventional air spring is shown in some embodiments of the present invention;

[0024] Figure 2 A perspective view of an air spring according to an embodiment of the present invention is shown;

[0025] Figure 3 Show Figure 2 Partial sectional view along the AA direction;

[0026] Figure 4 A perspective view of an air spring with a retaining ring according to an embodiment of the present invention is shown;

[0027] Figure 5 Show Figure 4 Partial sectional view along the BB direction;

[0028] Figure 6 A perspective view of the fixing ring in an embodiment of the present invention is shown;

[0029] Figure 7 A perspective view of another air spring according to an embodiment of the present invention is shown;

[0030] Figure 8 Show Figure 7 Partial sectional view along the CC direction;

[0031] Figure 9 Show Figure 8 Enlarged view of section D in the middle;

[0032] Figure 10 A perspective view of the protective sleeve in an embodiment of this utility model is shown.

[0033] There are 100 air springs available.

[0034] Traditional dust cover 110;

[0035] There is a casing of 120mm.

[0036] Air spring 200;

[0037] Dust cover 210; cavity 211; first deformable part 212; contact area 2121; mounting groove 2122; second deformable part 213; crest 2131; trough 2132; non-deformable part 214; recess 2141;

[0038] Casing 220; Flange 221;

[0039] 230 retaining ring;

[0040] Top cover 240;

[0041] Bottom cover 250. Detailed Implementation

[0042] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0043] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0044] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0045] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0046] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0047] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0048] refer to Figure 1 , Figure 1Exemplary embodiments of a conventional air spring 100 according to some implementations of this application are shown. The conventional protective sleeve 120 of the conventional air spring 100 is disposed within a conventional dust cover 110. In this embodiment, the conventional dust cover 110 does not contact any of the internal structures of the conventional air spring 100 (not all are shown in the figures). The advantages are: on the one hand, it is convenient to cover the external structure of the conventional dust cover 110 of the conventional air spring 100; on the other hand, since air springs are mainly used in automotive suspension systems, vibrations will occur during vehicle operation. Under vibration conditions, the internal structure of the conventional air spring 100 will correspondingly undergo tensile or compressive motion. During the movement, the large-volume conventional dust cover 110 avoids sliding friction with the internal structure of the conventional air spring 100, especially avoids sliding friction with the conventional protective sleeve 120.

[0049] However, in vehicles with limited installation space, that is, under conditions where the installation space is small, the traditional dust cover 110 occupies a large space and has a low space utilization rate, often making it impossible to arrange effectively, or even interfering with surrounding components.

[0050] For ease of subsequent description, the embodiments of this application first exemplarily define the X direction, Y direction, Z direction, and W direction. For example... Figure 2 As shown, the X direction is the first direction, the Z direction is the positive direction of the first direction, and the W direction is the opposite direction of the first direction; the Y direction is the second direction, and the X and Y directions are perpendicular to each other.

[0051] To solve the aforementioned existing problems while retaining the advantages of the existing air spring 100, reference is made to... Figure 2 , Figure 3 This application provides an air spring 200, including: a dust cover 210, a protective sleeve 220, an upper cover 240, and a lower cover 250. Along a first direction ( Figure 2 (In the X direction), the upper cover 240 and the lower cover 250 are spaced apart. The dust cover 210 extends along the first direction, one end of the dust cover 210 is fixedly connected to the upper cover 240, and the other end is fixedly connected to the lower cover 250. The upper cover 240, the lower cover 250 and the dust cover 210 together form a cavity 211.

[0052] refer to Figure 2 , Figure 3 In this embodiment, the dust cover 210 includes a first deformable portion 212, a non-deformable portion 214, and a second deformable portion 213 connected together. In some possible embodiments, the dust cover 210 may not have a non-deformable portion 214, and the first deformable portion 212 and the second deformable portion 213 may be directly connected.

[0053] In this embodiment, the first deformation part 212 and the second deformation part 213 are made of elastically deformable materials, such as plastics, spring steel, composite materials, etc. That is, the first deformation part 212 and the second deformation part 213 can undergo elastic deformation. Under vibration conditions, the dust cover 210 can adapt to the expansion or contraction of the internal structure (not shown in the figure) of the air spring 200. The dust cover 210 can always cover the internal structure of the air spring 200 to prevent contaminants from entering the interior of the air spring 200.

[0054] refer to Figure 2 , Figure 3 In this embodiment, the first deformation part 212 and the second deformation part 213 are bellows. Utilizing the characteristics of the bellows shape, the first deformation part 212 and the second deformation part 213 can undergo elastic deformation, specifically compression or stretching along a first direction. In some possible embodiments, the first deformation part 212 and the second deformation part 213 include, but are not limited to, bellows; other structures capable of elastic deformation can also be used, as long as they can achieve the directional deformation and motion adaptation functions of the first deformation part 212 and the second deformation part 213. This application does not impose any limitations on these aspects. (Reference) Figure 2 , Figure 3 In this embodiment, the non-deformable portion 214 extends along the first direction and is a ring structure of equal diameter. The non-deformable portion 214 is disposed between the first deformable portion 212 and the second deformable portion 213. In some possible embodiments, the non-deformable portion 214 may include, but is not limited to, a ring structure of equal diameter, or it may be a structure of variable diameter, such as a conical ring.

[0055] The non-deformable part 214 is a part that does not undergo elastic deformation. By providing the non-deformable part 214 between the first deformable part 212 and the second deformable part 213, the rigidity of the dust cover 210 is enhanced, and it provides support for the adjacent first deformable part 212 and second deformable part 213, making the dust cover 210 less prone to twisting and deformation.

[0056] In some possible implementations, a reinforcing structure (not shown in the figure) may also be provided on the non-deformable part 214 to further enhance the support capacity of the dust cover 210 and prevent the dust cover 210 from deforming.

[0057] refer to Figure 2 , Figure 3 In this embodiment, the first deformable part 212, the second deformable part 213, and the non-deformable part 214 are integrally formed. This eliminates seams, improves overall sealing, and effectively prevents contaminants from entering. In some possible embodiments, the first deformable part 212, the second deformable part 213, and the non-deformable part 214 are not limited to being integrally formed, and can be connected by welding, gluing, or other fusion methods; this application does not limit this.

[0058] refer to Figure 2 , Figure 3 In this embodiment, the protective sleeve 220 is a cylinder of equal diameter, and the protective sleeve 220 is disposed inside the cavity 211. The upper end of the protective sleeve 220 abuts against the inner wall of the first deformable part 212; along the second direction ( Figure 2 In the Y-direction, the protective sleeve 220 and the second deformable portion 213 are spaced apart, and the non-deformable portion 214 is spaced apart from the protective sleeve 220. The first direction and the second direction are perpendicular to each other. In some possible embodiments, the protective sleeve 220 may be, but is not limited to, a cylinder of uniform diameter, or a cylindrical structure of varying diameter, capable of abutting against the first deformable portion 212 and remaining in a non-contact state with the second deformable portion 213. This application does not limit the specific shape of the protective sleeve 220.

[0059] At the contact point between the first deformable portion 212 and the protective sleeve 220, the dimension of the first deformable portion 212 in the second direction is smaller than the dimension of the protective sleeve 220. The protective sleeve 220 is spaced apart from the second deformable portion 213 and the non-deformable portion 214, meaning that the dimensions of the second deformable portion 213 and the non-deformable portion 214 in the second direction are larger than the dimension of the protective sleeve 220, and they are always in a non-contact state with the protective sleeve 220. When the protective sleeve 220 has the same dimension, compared to the conventional dust cover 110 of the prior art which does not contact the internal structure of the existing air spring 100 (e.g., the existing protective sleeve 120), in this application, since the dimension of the first deformable portion 212 is reduced along the second direction at the contact point, the space occupied by the dust cover 210 at the contact point with the protective sleeve 220 is also reduced, allowing the air spring 200 to be used in a smaller installation space. Furthermore, since the dimensions of the second deformable part 213 and the non-deformable part 214 in the second direction are larger than the dimensions of the protective sleeve 220, the dust cover 210 can be installed on the outside of the protective sleeve 220 in the positive direction of the first direction, which is convenient for installation.

[0060] refer to Figure 2 , Figure 3 In this embodiment, along the second direction, the gap L between the non-deformable portion 214 and the casing 220 ( Figure 3 The gap L (as shown in the figure) is 2mm. In some possible embodiments, the gap L between the non-deformable part 214 and the casing 220 can be adjusted according to actual needs, as long as the gap L is greater than 0. This application does not limit this aspect.

[0061] Along the second direction, the non-deformable part 214 and the protective sleeve 220 are spaced apart. By limiting the gap between the non-deformable part 214 and the protective sleeve 220, the ineffective space occupation is reduced while ensuring that the two are always in a non-contact state, and the miniaturization of the dust cover 210 is further ensured.

[0062] refer to Figure 2 , Figure 3In this embodiment, the height h of the non-deformable portion 214 ( Figure 3 The height H (as shown in the middle h) is less than the height H of the casing 220. Figure 3 (As shown in H). In some possible embodiments, the height h of the non-deformable part 214 may also be greater than or equal to the height H of the sleeve 220, as long as it can support the first deformable part 212 and the second deformable part 213.

[0063] refer to Figure 2 , Figure 3 In this embodiment, the first deformable part 212 has an abutting region 2121, and the protective sleeve 220 abuts against the abutting region 2121; along the positive direction of the first direction, the cross-section of the abutting region 2121 gradually increases in size in the second direction. The abutting region 2121 is a frustum conical. In some possible embodiments, the shape of the abutting region 2121 includes, but is not limited to, a frustum conical, and may be stepped, arc-shaped, etc.

[0064] In this embodiment, since the contact area 2121 is a frustum of a cone, the contact area 2121 is along the positive direction of the first direction ( Figure 2 The dimension of the top of the (Z direction) is d ( Figure 3 As shown in d), the dimension of the bottom end of the contact region 2121 along the Z direction is a ( Figure 3 As shown in Figure a), dimension a is smaller than dimension d. Since the protective sleeve 220 is a cylinder of uniform diameter, the dimension of the protective sleeve 220 in the second direction remains unchanged, specifically dimension b. Figure 3 As shown in b), dimension b is greater than dimension a and less than dimension d, so that the sleeve 220 can abut against the first deformed part 212 in the abutment area 2121.

[0065] As the cross-section of the contact area 2121 gradually increases in the second direction along the first positive direction, the contact area 2121 forms a one-way lock. After the casing 220 comes into contact with the contact area 2121, it will not move in the opposite direction relative to the contact area 2121 along the first direction. Figure 2 middle W direction).

[0066] In this embodiment, the second deformable part 213 is a bellows with multiple alternating peaks 2131 and troughs 2132, and the diameter of each trough 2132 in the second direction is c ( Figure 3 As shown in Figure c), dimension c is larger than dimension b of the protective sleeve 220, meaning that the protective sleeve 220 and the second deformed part 213 are always in a non-contact state. In some possible embodiments, the shape formed by each trough 2132 is not limited to a circle, but can also be a square, ellipse, etc.

[0067] It should be noted that when installing the air spring 200, the first deformation part 212 is in a pre-compressed state by pre-compressing the dust cover 210. For example, along the first direction, the height of the first deformation part 212 is e ( Figure 3 As shown in Figure e), the height of the first deformation part 212 in its free state is 100mm, its height after full compression is 50mm, and its height after pre-compression is 80mm. When the air spring 200 stretches under vibration conditions and drives the protective cylinder 220 to move in the opposite direction along the first direction, the protective cylinder 220 abuts against the first deformation part 212 and further compresses the first deformation part 212, causing it to undergo elastic deformation. At this time, the height e of the first deformation part 212 along the first direction is between 50mm and 80mm. When the air spring 200 contracts and drives the protective cylinder 220 to move in the forward direction along the first direction, the first deformation part 212 remains in contact with the protective cylinder 220 due to its preload. At this time, the height e of the first deformation part 212 along the first direction is between 80mm and 100mm. Implemented in this way, the first deformation part 212 can always remain in contact with the protective cylinder 220, avoiding the protective cylinder 220 and the first deformation part 212 from contacting each other after separation, thus preventing collision noise.

[0068] refer to Figure 4 , Figure 5 In this embodiment, the air spring 200 further includes a retaining ring 230, which is disposed on the outer periphery of the non-deformable portion 214 and is used to fix the non-deformable portion 214 and the protective sleeve 220. (See reference) Figure 6 In this embodiment, the fixing ring 230 is an annular elastic structure. In some possible embodiments, the fixing ring 230 may be annular, or may be cylindrical, non-continuous claw-shaped, arc-shaped, or other structures, as long as it can fix the sleeve 220 to the non-deformable part 214. This application does not limit this.

[0069] In some possible implementations, including but not limited to using a retaining ring 230 for fixing, it can be achieved by bundling wire harnesses, tightening with tape, or other components with similar fastening functions. This application does not limit the fixing method.

[0070] By setting a retaining ring 230, the non-deformable part 214 is fixed to the protective sleeve 220, which effectively restricts the movement of the protective sleeve 220 relative to the dust cover 210, specifically including movement and rotation along the first direction and movement along the second direction. This avoids wear and abnormal noise caused by the relative movement of the protective sleeve 220, and improves the reliability and durability of the air spring 200.

[0071] refer to Figure 10 In this embodiment, the outer periphery of the casing 220 is provided with a continuous flange 221 that protrudes outward. (See reference) Figure 7 , Figure 8 , Figure 9 In this embodiment, the first deformable part 212 is provided with a mounting groove 2122, which engages with the flange 221. In some possible embodiments, the flange 221 may be a continuous or discontinuous protrusion, as long as it can engage with the mounting groove 2122 to restrict the movement of the sleeve 220 in the first direction. This application does not limit this.

[0072] By providing an outwardly protruding flange 221 on the outer periphery of the casing 220 and opening a matching mounting groove 2122 at the corresponding position of the first deformed part 212, a mechanical interlock is formed through the concave-convex fit between the mounting groove 2122 and the flange 221, thereby restricting the forward and reverse movement of the casing 220 along the first direction.

[0073] In some possible implementations, the fixing method includes, but is not limited to, the flange 221 and the first deformed part 212 engaging in a concave-convex fit, or it can be connected by setting a thread; or by welding, riveting, etc., which are not limited here.

[0074] refer to Figure 7 , Figure 8 , Figure 9 In this embodiment, the non-deformable part 214 has a recess 2141 along its outer periphery, and the fixing ring 230 is embedded in the recess 2141.

[0075] By providing a recess 2141 along the outer periphery of the non-deformable portion 214 and embedding the fixing ring 230 in the recess 2141, the installation position of the fixing ring 230 is clearly defined, and the movement of the fixing ring 230 relative to the non-deformable portion 214 is more effectively restricted.

[0076] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An air spring, characterized in that, include: A dust cover extends along a first direction and has a cavity. The dust cover includes a first deformable part and a second deformable part connected to each other. A protective sleeve is disposed within the cavity, and the protective sleeve abuts against the inner wall of the first deformable part; along the second direction, the protective sleeve and the second deformable part are spaced apart. Wherein, the first direction and the second direction are perpendicular to each other.

2. The air spring as claimed in claim 1, characterized in that, The first deformable part has an abutting area, and the protective sleeve abuts against the abutting area; Along the positive direction of the first direction, the cross-sectional dimension of the abutment region gradually increases in the second direction.

3. The air spring as described in claim 1, characterized in that, The outer periphery of the protective sleeve is provided with an outwardly protruding flange; The first deformable part is provided with a mounting groove, which is in concave-convex fit with the flange.

4. The air spring as claimed in claim 1, characterized in that, Also includes: The non-deformable portion extends along the first direction and is disposed between the first deformable portion and the second deformable portion; Along the second direction, the non-deformable portion is spaced apart from the protective casing.

5. The air spring as described in claim 4, characterized in that, The non-deformable part is a ring structure of equal diameter.

6. The air spring as described in claim 5, characterized in that, Also includes: A retaining ring is provided on the outer periphery of the non-deformable part for fixing the non-deformable part to the protective sleeve.

7. The air spring as claimed in claim 6, characterized in that, The non-deformable part has a recess along its outer periphery, and the fixing ring is embedded in the recess.

8. The air spring as claimed in claim 4, characterized in that, The first deformable part, the second deformable part, and the non-deformable part are integrally formed.

9. The air spring as claimed in claim 1, characterized in that, The first deformation part and the second deformation part are made of elastically deformable material.

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