Air spring, suspension assembly and automobile

Abstract

The invention discloses an air spring, a suspension assembly and an automobile. The air spring includes a first member and a second bladder. A first cavity is formed in the first component and used for containing gas. The first cavity is suitable for being communicated with a first air source. The second bag skin is arranged in the first cavity, and the second bag skin is suitable for being communicated with a second air source. The second bag skin has a first inflation state, and in the first state, the second bag skin can define a second cavity so that the air spring can be in a standby working state. According to the air spring, when the first component loses efficacy, the second bag skin, in the standby working state, in the air spring is rapidly inflated to recover the working state under the action of the second air source, and damping connection can be maintained between the two components needing damping connection.

Description

Technical Field

[0001] The present application relates to the technical field of air springs, and in particular to an air spring, a suspension assembly and a car. Background Art

[0002] The air spring bladder skin is damaged or falls off due to fatigue, overload, collision and other reasons, resulting in a sudden drop in pressure in the air spring cavity. When the air spring fails, the body posture suddenly deteriorates, causing the vehicle to instantly enter an unstable driving state, which is prone to safety accidents.

[0003] Therefore, an air spring, a suspension assembly and a vehicle are needed to at least partially solve the above problems. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description of the Invention section. The Summary of the Invention section of this application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] In order to at least partially solve the above problems, the present application provides an air spring in a first aspect, comprising:

[0006] A first component, wherein a first cavity is formed in the first component, and the first cavity is suitable for communicating with a first gas source; and

[0007] A second bladder skin, wherein the second bladder skin is disposed in the first cavity, and the second bladder skin is suitable for being connected to a second air source;

[0008] First cavity wherein the second bladder skin comprises a first inflated state, in which the second bladder skin can define a second cavity to enable the air spring to be in a standby working state. First cavity

[0009] According to the air spring of the present application, when the first component fails, the second bladder in the air spring which is in a standby working state is rapidly inflated and restored to a working state under the action of a second air source, so that a shock-absorbing connection can be maintained between the two components that require a shock-absorbing connection.

[0010] Optionally, when the first cavity does not leak, the air spring is in a normal working state, and when the first cavity leaks, the second bladder skin in the first state can put the air spring in the standby working state.

[0011] Optionally, the first component includes a first connection portion, a second connection portion, and a first capsule skin, wherein the first capsule skin is connected between the first connection portion and the second connection portion, and the first cavity with a variable volume is defined between the first capsule skin, the first connection portion, and the second connection portion, and the second capsule skin is connected to the second connection portion;

[0012] When the second air skin is in the first state, the second air skin contacts the first connecting portion and / or the first air skin, so that the air spring is in the standby working state.

[0013] Optionally, the first bladder skin is suitable for being selectively connected to the first gas source.

[0014] Optionally, the air spring includes a first pipeline, the first pipeline is suitable for connecting the first bladder skin with the first air source, and a first control valve is arranged on the first pipeline.

[0015] Optionally, the second bladder skin is suitable for being selectively connected to the second gas source.

[0016] Optionally, the air spring includes a second pipeline, the second pipeline is suitable for connecting the second bladder skin with the second air source, and a second control valve is arranged on the second pipeline.

[0017] Optionally, the second bladder skin is provided with an air inlet.

[0018] The second connecting portion is provided with a second through hole, and the second pipeline is communicated with the air inlet through the second through hole.

[0019] Optionally, the air spring further includes a fastening assembly, wherein the fastening assembly is provided to the second connecting portion, and the air spring is configured such that the second bladder skin destroys the fastening assembly under the action of the second air source.

[0020] Optionally, the fastening assembly comprises:

[0021] a fixing belt, disposed on a portion of the second bladder skin to limit the second bladder skin, wherein the fixing belt is an elastic belt; and

[0022] A fixing bolt is used to connect the two ends of the fixing belt to the second connecting part,

[0023] The air spring is configured such that the second bladder skin destroys the fixing belt or the connection between the fixing bolt and the fixing belt under the action of internal air pressure.

[0024] Optionally, one of the first connecting part and the second connecting part is an end cover, and the other is a piston.

[0025] Optionally, the first connecting part is an end cover, and the second connecting part is a piston.

[0026] Optionally, the air spring is configured such that when the first cavity leaks air, the second bladder skin is in the first state.

[0027] Optionally, the second bladder skin comprises a second uninflated state,

[0028] The air spring is configured such that, when the first cavity is leak-proof, the second bladder skin is in the second state.

[0029] Optionally, the air spring further comprises:

[0030] The pressure sensor is used to sense the air pressure of the first cavity, and the air pressure of the first cavity is used to indicate whether the first cavity is leaking.

[0031] A second aspect of the present application provides a suspension assembly, comprising the air spring described in the first aspect.

[0032] According to the suspension assembly of the present application, when the first component fails, the second air spring in the standby working state is rapidly inflated and restored to the working state under the action of the second air source, so that the two components that need to be connected by shock absorption can still maintain the shock absorption connection, so that the vehicle body maintains a normal driving posture. This can prevent the vehicle from entering an unstable driving state instantly due to the sudden deterioration of the vehicle body posture, and also ensure that the damaged vehicle can subsequently drive normally to the repair site autonomously.

[0033] A third aspect of the present application provides a vehicle, comprising the suspension assembly described in the second aspect.

[0034] According to the automobile of the present application, when the first component fails, the second air spring in the standby working state is rapidly inflated and restored to the working state under the action of the second air source, so that the two components that need to be connected by shock absorption can still maintain the shock absorption connection, so that the vehicle body maintains a normal driving posture. Therefore, it can prevent the vehicle from entering an unstable driving state instantly due to the sudden deterioration of the vehicle body posture, and also ensure that the damaged vehicle can subsequently drive to the repair site autonomously and normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The following drawings of the present application are used as a part of the present application for understanding the present application. The drawings show the embodiments of the present application and their descriptions, which are used to explain the principle of the present application.

[0036] In the attached figure:

[0037] Figure 1 is a three-dimensional schematic diagram of the appearance of an air spring according to an embodiment of the present application, wherein the second bladder skin is in a second state;

[0038] Figure 2 for Figure 1 A schematic cross-sectional view of the air spring, wherein the second bladder skin is in a second state;

[0039] Figure 3 is a schematic structural diagram of an air spring according to an embodiment of the present application, wherein the second bladder skin is in a first state;

[0040] Figure 4 is a schematic structural diagram of an air spring according to an embodiment of the present application;

[0041] Figure 5 for Figure 2 A partial enlarged schematic diagram of part A;

[0042] Figure 6 is a three-dimensional schematic diagram of a second bladder skin of an air spring in a first state according to an embodiment of the present application;

[0043] Figure 7 for Figure 5 A perspective schematic diagram of part B from another angle.

[0044] Description of reference numerals:

[0045] 1: First connection part

[0046] 2: First capsule skin

[0047] 3: Support part

[0048] 4: First pipeline

[0049] 5: Second pipeline

[0050] 6: Second capsule

[0051] 7: Fixed bolt

[0052] 8: Fixed belt

[0053] 9: Connecting plate

[0054] 10: Second connection part

[0055] 11: Pressure sensor

[0056] 12: Controller

[0057] 13: Gas tank

[0058] 14: First valve

[0059] 15: Second valve

[0060] 16: First cavity

[0061] 17: Second through hole

[0062] 18: Air Inlet

[0063] 19: Fastening components

[0064] 20: Air spring

[0065] 21: Sealing device

[0066] 30: First Part DETAILED DESCRIPTION

[0067] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present application. However, it is apparent to those skilled in the art that the present application can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present application, some technical features well known in the art are not described.

[0068] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of the features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0069] Ordinal numbers such as “first” and “second” cited in the present application are merely identifications and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term “first component” itself does not imply the existence of the “second component”, and the term “second component” itself does not imply the existence of the “first component”.

[0070] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and similar expressions used in this document are for illustrative purposes only and are not limiting.

[0071] The present application provides an air spring, a suspension assembly having the air spring, and a vehicle having the suspension assembly.

[0072] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

[0073] like Figure 1 and Figure 2As shown, in a specific embodiment, the air spring 20 is arranged between a first part and a second part that need to be connected with a damping system. The air spring 20 includes a first component 30 and a second bladder skin 6 .

[0074] A first cavity 16 is formed in the first component 30. The first cavity 16 is suitable for being connected to a first gas source, for example, suitable for being selectively connected to the first gas source, so that the first cavity 16 is used to accommodate gas. At least part of the cavity wall of the first cavity 16 (that is, at least part of the first component 30) is made of a flexible material, for example, a first bladder skin 2. The first cavity 16 is used to be arranged between the first part and the second part to play a shock absorbing role. A first connecting portion 1 for connecting the first part is provided at one end of the first component 30, that is, the air spring 20 is connected to the first part through the first connecting portion 1. The first part is, for example, a chassis assembly of a vehicle. Similarly, a second connecting portion 10 for connecting the second part is provided at the other end of the first component 30, that is, the air spring 20 is connected to the second part through the second connecting portion 10. The second part is, for example, a wheel assembly of a vehicle. The first bladder skin 2 is connected between the first connecting portion 1 and the second connecting portion 10. A first cavity 16 with a variable volume is defined between the first bladder skin 2, the first connecting portion 1 and the second connecting portion 10.

[0075] The first connection part 1 of the air spring 20 is, for example, located at the top of the air spring 20, and the second connection part 10 is, for example, located at the bottom of the air spring 20. The air spring 20 is disposed between the first part and the second part arranged in the up-down direction, and plays a buffering role of elastic connection.

[0076] One of the first connection part 1 and the second connection part 10 is an end cover, and the other is a piston. For example, the first connection part 1 is an end cover, and the second connection part 10 is a piston.

[0077] The second bladder skin 6 is disposed in the first cavity 16. The second bladder skin 6 is adapted to be connected to the second gas source, for example, adapted to be selectively connected to the second gas source. The second bladder skin 6 is connected to the second connecting portion 10. At least a portion of the second bladder skin 6 is made of a flexible material. The second bladder skin 6 can be designed to be made of a rubber material with a thickness of less than 0.5 mm. The second bladder skin 6 includes a first state (such as a state in which the second bladder skin 6 is filled with gas) filled with gas. Figure 3 ) and a second state without gas filling (as shown Figure 2 As shown). In the first state, the second capsule skin 6 can define a second cavity, and the second capsule skin 6 can contact (eg, abut) the first connection portion 1 and / or the first capsule skin 2.

[0078] When the first cavity 16 is not leaking, the air spring 20 is in a normal working state. The air spring 20 is configured so that when the first cavity 16 leaks, the second bladder skin 6 is in a first state. When the first cavity 16 cannot work normally, that is, when there is a failure phenomenon such as damage and leakage, the second bladder skin 6 is started and enters a working state, that is, a first state. In a short time, the second bladder skin 6 is filled with gas and contacts the first connecting part 1 and / or the first bladder skin 2, playing the role of a temporary air spring 20. That is, the second bladder skin 6 in the first state can put the air spring 20 in a standby working state.

[0079] like Figure 4 As shown, the air spring 20 further includes a pressure sensor 11 , an air tank 13 and a controller 12 .

[0080] In this embodiment, the pressure sensor 11 is used to sense the air pressure of the first cavity 16, and the air pressure of the first cavity 16 is used to indicate whether the first cavity 16 is leaking. The gas tank 13 is used to store high-pressure gas. The gas tank 13 is connected to the second cavity through the second pipe 5. That is, the gas tank 13 can be selected as the second gas source. The second pipe 5 is provided with a second valve 15. The controller 12 is electrically connected to the pressure sensor 11 and the second valve 15. The controller 12 is configured to, when the pressure value sensed by the pressure sensor 11 is less than or equal to a preset pressure threshold, the controller 12 determines that the first cavity 16 is leaking, and controls the second valve 15 to open, so that the gas tank 13 inflates the second cavity, so that the second bladder skin 6 is in the first state.

[0081] According to this solution, the air spring 20 can realize an automatic leak detection function. When the pressure sensor 11 detects an abnormal change in the air pressure drop in the first cavity 16, that is, when the pressure value sensed by the pressure sensor 11 is less than or equal to the preset pressure threshold, it can be determined that there is a leak in the first cavity 16. The controller 12 immediately issues an opening command to the second valve 15 to allow the high-pressure gas in the gas tank 13 to enter the second cavity. After the inflation process is completed, the second bladder skin 6 is in the first state filled with high-pressure gas, attached between the first connecting part 1 and the second connecting part 10, that is, it is switched from the standby state to the working state, achieving a timely response. This setting ensures that the air spring 20 can quickly resume working state.

[0082] The preset pressure threshold of the air spring 20 is, for example, 90%-110% of the standard atmospheric pressure. The preset pressure threshold is set to realize automatic leakage detection of the air spring 20. When the pressure sensor 11 detects that the air pressure in the first cavity 16 reaches 90%-110% of the standard atmospheric pressure, it can be determined without a doubt that the first cavity 16 has been damaged and connected to the atmosphere. Preferably, the preset pressure threshold of the air spring 20 is 95%-105% of the standard atmospheric pressure.

[0083] like Figure 1 and Figure 2 As shown, the second connection part 10 includes a support part 3. The support part 3 is configured as a cylinder. The first bladder skin 2 is made of a flexible material. The first bladder skin 2 is connected between the circumferential outer edge of the other end of the support part 3 along the axial direction and the first connection part 1. The first connection part 1, the second connection part 10 and the first bladder skin 2 together enclose a first cavity 16. The first bladder skin 2 of the first cavity 16 is flexible, so that a shock absorbing effect can be achieved.

[0084] Optionally, the shape of the second bladder skin 6 in the first state is adapted to the inner contour of the support portion 3. In the inflated state, the second bladder skin 6 of the air spring 20 fills the support portion 3 as much as possible, which can enhance the connection strength between the second bladder skin 6 and the second connecting portion 10, thereby enhancing the stability of the air spring 20 in an emergency state.

[0085] The air spring 20 further includes a first conduit 4. Figure 4 As shown, the first pipe 4 is used to connect the gas tank 13 and the first cavity 16. That is, the gas tank 13 can be selected as the first gas source. The first pipe 4 is provided with a first valve 14. The first valve 14 is electrically connected to the controller 12. When the air spring 20 needs to be supplemented with high-pressure gas when it is used for the first time or after being used for a period of time, it needs to be achieved through the inflation device. The inflation device includes the first pipe 4, the second gas source 13 and the first valve 14. When it is inflated for the first time or the pressure detection device identifies that the air spring 20 needs to be inflated, the first valve 14 is opened, and the second gas source 13 is connected to the first cavity 16 through the first pipe 4, and the inflation process of the first cavity 16 can be carried out.

[0086] Preferably, the pressure sensor 11 is arranged in the first pipe 4 between the first valve 14 and the first cavity 16, so that the working state of the pressure sensor 11 is not affected by the first valve 14. The pressure sensor 11 is always connected to the first cavity 16 to monitor the pressure state in the first cavity 16 to ensure the timeliness of subsequent actions.

[0087] like Figure 5 As shown, the second bladder skin 6 of the air spring 20 is connected to the second connecting part 10. The second connecting part 10 is provided with a second through hole 17, and the second pipe 5 is connected to the second cavity through the second through hole 17. The second bladder skin 6 is connected to the second connecting part 10 whether in the first state or the second state, and the second connecting part 10 is correspondingly provided with an opening for inflating the second bladder skin 6, namely the second through hole 17. The second through hole 17 is connected to the second cavity and is used to deliver high-pressure gas into the interior of the second cavity so that it remains filled in the working state. Optionally, the second pipe 5 of the air spring 20 is connected to the second through hole 17 by a threaded pair. The threaded connection method is conducive to the stable connection of the second pipe 5 and the second connecting part 10, saves installation space, and is easy to operate.

[0088] Preferably, a sealing device 21 (such as a sealing ring) is further provided between the second through hole 17 and the second pipe 5 , so that there will be no air leakage at the second through hole 17 .

[0089] like Figure 5 , Figure 6 and Figure 7 As shown, the second bladder skin 6 includes a connecting plate 9. The connecting plate 9 is connected to the second connecting part 10. The connecting plate 9 is provided with an air inlet 18, and the second pipe 5 is connected to the second cavity through the air inlet 18. The connecting plate 9 facilitates the connection between the second bladder skin 6 and the second connecting part 10. The connecting plate 9 can be designed to adopt an aluminum plate with a thickness of 5 mm. The connecting plate 9 is connected to the second connecting part 10 for easy assembly. The second connecting part 10 is provided with a second through hole 17 connected to the second pipe 5, and the connecting plate 9 is correspondingly provided with an air inlet 18, so that the second pipe 5 is connected to the air inlet 18 through the second through hole 17, thereby communicating with the second cavity, and the inflation process of the second cavity can be carried out.

[0090] like Figure 2 and Figure 5 As shown, in the second state, the second bladder skin 6 cannot be attached to the first connection part 1 and the second connection part 10 at the same time (only one of the first connection part 1 and the second connection part 10 is attached; or in other embodiments, neither the first connection part 1 nor the second connection part 10 is attached). The air spring 20 is configured so that when the first cavity 16 is airtight, the second bladder skin 6 is in the second state. Preferably, when the second bladder skin 6 is in the second state, the second bladder skin 6 is in a folded shape. When the first cavity 16 is in a normal working state, the second bladder skin 6 is in a standby state, so it is not filled with high-pressure gas, and is in a stable folded state, occupying a small space, and does not affect the normal operation of the first cavity 16. In the illustrated embodiment, in the second state, the second bladder skin 6 cannot be attached to the first connection part 1.

[0091] like Figure 5As shown, the air spring 20 further includes a fastening assembly 19. The fastening assembly 19 is provided to the second connection portion 10, and is used to limit the movement of the second bladder skin 6 in the second state. The air spring 20 is configured so that the second bladder skin 6 in the first state destroys the fastening assembly 19 under the action of the internal air pressure, that is, the second bladder skin 6 destroys the fastening assembly 19 under the action of the second air source. When the second bladder skin 6 is in the second state, that is, the standby state, it is necessary to ensure that the second bladder skin 6 does not interfere with the normal operation of the air spring 20, so the fastening assembly 19 is required. The second bladder skin 6 is connected to the second connection portion 10, so the fastening assembly 19 is also provided on the second connection portion 10, and is used to limit the movement of the second bladder skin 6. When the second bladder skin 6 is in the first state, that is, when the second bladder skin 6 needs to enter the working state immediately, the fastening assembly 19 can be destroyed in a short time under the action of the internal air pressure of the second bladder skin 6, so that the second bladder skin 6 can smoothly complete the inflation process, replace the first cavity 16 to complete the function of the air spring 20, and is not affected by the assembly space and assembly size.

[0092] Specifically, the fastening assembly 19 of the air spring 20 includes a fixing belt 8 and a fixing bolt 7. The fixing belt 8 is arranged on a portion of the second bladder skin 6 to limit the movement of the second bladder skin 6 in the second state. The fixing belt 8 is an elastic belt. The fixing bolt 7 is used to connect the fixing belt 8 to the second connecting portion 10. Thus, as shown in the figure, the fixing bolt 7 connects the two ends of the fixing belt 8 to the second connecting portion 10, for example, nailed to the second connecting portion 10, so that the fixing belt 8 binds the second bladder skin 6 in the second state to the second connecting portion 10. The air spring 20 is configured so that the second bladder skin 6 in the first state destroys the fixing belt 8 under the action of the internal air pressure, for example, bursts or breaks the fixing belt 8. Alternatively, the air spring 20 is configured so that the second bladder skin 6 in the first state destroys the connection between the fixing bolt 7 and the fixing belt 8 under the action of the internal air pressure, for example, the fixing belt 8 is separated from the fixing bolt 7 after the fixing belt 8 is subjected to force.

[0093] According to this solution, the fastening assembly 19 specifically realizes two functions of fastening and being destructible in a short time in the form of cooperation between the fixing belt 8 and the fixing bolt 7. To realize these two functions, the fixing belt 8 and the fixing bolt 7 need to be subjected to force calculation or simulation during the design process to meet the functional requirements through parameter control.

[0094] According to the air spring 20 of the present application, when the first cavity 16 fails, the air spring 20 can quickly resume the working state under the action of the pre-reserved second bladder skin 6, so that the shock-absorbing connection can be maintained between the two components that need the shock-absorbing connection.

[0095] The suspension assembly according to the present application includes the above-mentioned air spring 20. The automobile according to the present application includes the suspension assembly according to the present application, a chassis assembly and a wheel assembly. The suspension assembly is connected between the chassis assembly and the wheel assembly. When the road conditions are poor, there will be a certain degree of bumps during the driving of the vehicle, and relative movement will occur between the chassis assembly and the wheel assembly. The air spring 20 in the suspension assembly can play a vibration-absorbing role to ensure a better experience for passengers during driving. It can be understood that the suspension assembly according to the present application and the automobile according to the present application include all the features and effects of the air spring 20 according to the present application.

[0096] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present application. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present application. The features described herein in one embodiment may be applied to another embodiment individually or in combination with other features, unless the feature is not applicable or otherwise specified in the other embodiment.

[0097] The present application has been illustrated through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and explanation, and the present application is not limited to the above-mentioned embodiments. According to the teachings of the present application, more variations and modifications can be made, and these variations and modifications all fall within the scope of protection claimed by the present application.

Claims

1. An air spring, characterized in that: include: A first component, wherein a first cavity is formed in the first component, and the first cavity is suitable for communicating with a first gas source; and A second bladder skin, wherein the second bladder skin is disposed in the first cavity, and the second bladder skin is suitable for being connected to a second air source; The second bladder skin includes a first inflated state. In the first state, the second bladder skin can define a second cavity to enable the air spring to be in a standby working state.

2. The air spring according to claim 1, characterized in that: When the first cavity does not leak, the air spring is in a normal working state. When the first cavity leaks, the second bladder skin in the first state can put the air spring in the standby working state.

3. The air spring according to claim 1 or 2, characterized in that: The first component includes a first connection part, a second connection part and a first capsule skin, the first capsule skin is connected between the first connection part and the second connection part, and the first cavity with a variable volume is defined between the first capsule skin, the first connection part and the second connection part, and the second capsule skin is connected to the second connection part; When the second air skin is in the first state, the second air skin contacts the first connecting portion and / or the first air skin, so that the air spring is in the standby working state.

4. The air spring according to claim 3, characterized in that: The first bladder skin is adapted to be selectively connected to the first gas source.

5. The air spring according to claim 4, characterized in that: The air spring comprises a first pipeline, the first pipeline is suitable for connecting the first bladder skin with the first air source, and a first control valve is arranged on the first pipeline.

6. The air spring according to claim 3, characterized in that: The second bladder skin is adapted to be selectively connected to the second gas source.

7. The air spring according to claim 6, characterized in that: The air spring comprises a second pipeline, the second pipeline is suitable for connecting the second bladder skin with the second air source, and a second control valve is arranged on the second pipeline.

8. The air spring according to claim 7, characterized in that: The second bladder skin is provided with an air inlet. The second connecting portion is provided with a second through hole, and the second pipeline is communicated with the air inlet through the second through hole.

9. The air spring according to claim 3, characterized in that: The air spring further includes a fastening assembly, which is arranged at the second connecting portion. The air spring is configured such that the second bladder skin destroys the fastening assembly under the action of the second air source.

10. The air spring according to claim 9, characterized in that The fastening assembly comprises: a fixing belt, disposed on a portion of the second bladder skin to limit the second bladder skin, wherein the fixing belt is an elastic belt; and A fixing bolt is used to connect the two ends of the fixing belt to the second connecting part, The air spring is configured such that the second bladder skin destroys the fixing belt or the connection between the fixing bolt and the fixing belt under the action of internal air pressure.

11. The air spring according to claim 3, characterized in that: One of the first connecting part and the second connecting part is an end cover, and the other is a piston.

12. The air spring according to claim 11, characterized in that The first connecting part is an end cover, and the second connecting part is a piston.

13. The air spring according to claim 3, characterized in that: The air spring is configured such that when the first cavity leaks air, the second bladder skin is in the first state.

14. The air spring according to claim 13, characterized in that The second bladder skin comprises a second uninflated state, The air spring is configured such that, when the first cavity is leak-proof, the second bladder skin is in the second state.

15. The air spring according to claim 13, characterized in that The air spring further comprises: The pressure sensor is used to sense the air pressure of the first cavity, and the air pressure of the first cavity is used to indicate whether the first cavity is leaking.

16. A suspension assembly, characterized in that: The air spring comprises the air spring according to any one of claims 1 to 15.

17. A car, characterized in that: include: The suspension assembly as claimed in claim 16.

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