Air spring and vehicle

Abstract

The invention provides an air spring and a vehicle. The air spring comprises a shell assembly, a damping assembly, an air bag assembly and a control assembly. The shell assembly comprises a first shell connected with a vehicle body of a vehicle and a second shell connected with wheels of the vehicle, wherein the first shell and the second shell are separately arranged in the vertical direction. The damping assembly is assembled in the second shell and extends out of the second shell to be connected with the wheels. The air bag assembly comprises a main air bag assembled on the top of the damping assembly and an elastic inner bag telescopically assembled in the first shell. The control assembly is used for controlling connection and disconnection of the air supply system, the main air bag and the elastic inner bag, so that the main air bag and the elastic inner bag are inflated or deflated, and the damping assembly moves in the vertical direction under the action of the main air bag and the elastic inner bag. According to the air spring, the air quantity of the elastic inner bag is adjusted under different use scenes, the supporting effect of the elastic inner bag is changed, on the basis of the buffering effect, the rigidity of the air spring under different conditions is adjusted in real time, the driving and riding comfort is improved, and the user experience feeling is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an air spring and a vehicle. Background Art

[0002] In related technologies, the primary function of air springs is to adjust vehicle height, thereby mitigating vehicle impacts. Vehicles have varying requirements for air spring stiffness in different driving modes. Current air springs have an air chamber, which is inflated or deflated to adjust vehicle height. However, this air spring's stiffness adjustment is limited, making it unable to meet the vehicle's gear stiffness requirements under different conditions and usage scenarios. Furthermore, due to the limited support provided by the air chamber, it is also unable to better adjust and cushion the impact of different road surfaces on the vehicle's wheels and body, nor is it able to adjust the air spring's stiffness requirements when the vehicle is subjected to varying vehicle loads. This reduces driving and riding comfort, and diminishes the user experience. Summary of the Invention

[0003] The present application provides an air spring with adjustable stiffness and a vehicle.

[0004] The present application provides an air spring, assembled on a vehicle, comprising:

[0005] A housing assembly comprising a first housing and a second housing separated in a vertical direction, wherein the first housing is used to connect to a vehicle body, and the second housing is used to connect to a wheel of the vehicle;

[0006] a shock absorbing assembly assembled in the second shell, passing through the bottom of the second shell, and extending outside the second shell to be connected to the wheel;

[0007] An airbag assembly comprising a main airbag and an elastic inner bag, wherein the main airbag is assembled on top of the shock absorbing assembly, the main airbag being partially located within the second shell and partially protruding upward from the top of the second shell and abutting against the bottom of the first shell; the elastic inner bag being telescopically assembled within the first shell; and

[0008] A control component is used to connect the air supply system and is respectively connected to the main airbag and the elastic inner bag. The control component is used to control the connection and disconnection between the air supply system and the main airbag and the elastic inner bag respectively, so that the air supply system inflates or deflates the main airbag and the elastic inner bag respectively. The shock absorbing component moves in the vertical direction under the action of the main airbag and the elastic inner bag.

[0009] Optionally, the airbag assembly also includes a connecting airbag, which is assembled in the first shell and located at the bottom of the elastic inner bag; the connecting airbag includes at least one air hole, which connects the main airbag and the elastic inner bag; the air spring also includes at least one switching switch, which is provided at the air hole and is used to control the opening or closing of the air hole to control the connection between the main airbag and the elastic inner bag.

[0010] Optionally, the air spring also includes an elastic member assembled in the first shell, and the elastic member extends downward from the top wall of the first shell and extends through the connecting airbag into the main airbag, and the elastic inner bag and the connecting airbag are both located on the peripheral side of the elastic member.

[0011] Optionally, when the shock absorbing assembly moves upward in the vertical direction under the action of the main airbag and the elastic inner bag, it abuts against the bottom of the elastic member.

[0012] Optionally, the air spring further includes a housing seal assembled in the first housing and located on top of the elastic member.

[0013] Optionally, the main airbag includes an airbag main body and an airbag ring body provided at the bottom of the airbag main body and connected to the airbag main body, the airbag main body is located at the top of the shock absorbing assembly, and the airbag ring body is arranged between the outer peripheral wall of the shock absorbing assembly and the inner peripheral wall of the second shell.

[0014] Optionally, the airbag assembly further includes a support member extending in a horizontal direction and located between the airbag main body and the airbag ring body; an end portion of the support member contacts an inner side wall of the airbag main body in a horizontal direction.

[0015] Optionally, the airbag ring portion is located in the second shell, part of the airbag main body is located in the second shell, and part is protruded from the top of the second shell and located at the bottom of the first shell.

[0016] Optionally, the shock absorbing assembly includes a piston and a shock absorber sleeved in the piston, the piston is assembled at the bottom of the airbag main body and is located in the airbag ring body, the shock absorber extends into the airbag main body toward one end of the first shell, and the shock absorber passes through the bottom of the second shell toward one end of the second shell, and extends to the outside of the second shell to connect with the wheel, and the shock absorber drives the piston to move in the vertical direction under the action of the airbag main body and the airbag ring body.

[0017] Optionally, the piston includes a piston body and a piston inclined portion arranged at the bottom of the piston body, the piston body extends in a vertical direction, and the piston inclined portion is inclined from the bottom of the piston body from top to bottom, along the direction away from the center axis of the shock absorber toward the direction close to the center axis of the shock absorber.

[0018] Optionally, the second shell includes a cylinder, a dust cover and a chassis, the cylinder extends in a vertical direction and abuts against the airbag ring portion and part of the airbag main body portion in a horizontal direction, the dust cover is telescopically assembled at the bottom of the cylinder, and is inclined from the bottom of the cylinder from top to bottom, along the direction away from the central axis of the shock absorber toward the direction close to the central axis of the shock absorber, the chassis is assembled at the bottom of the dust cover and connected to the shock absorbing assembly.

[0019] Optionally, the second shell includes a chassis, and the shock absorbing assembly further includes a piston seal assembled between the inner wall of the piston and the outer wall of the shock absorber, and the piston seal is arranged close to the chassis.

[0020] The present application also provides a vehicle, comprising:

[0021] A vehicle body and a plurality of wheels disposed at the bottom of the vehicle body;

[0022] an air supply system, provided on the vehicle body; and

[0023] As in any one of the aforementioned air springs, the air supply system is connected to a control component of the air spring, the first housing of the air spring is connected to the vehicle body, and the second housing of the air spring is connected to the wheel.

[0024] Optionally, the vehicle also includes an on-board controller, which is connected to the control component of the air spring and is used to control the opening or closing of the control component so that the air supply system can supply gas to the main airbag and the elastic inner bag of the airbag assembly of the air spring.

[0025] Optionally, the vehicle includes an air supply pipeline, which is used to be connected to the air supply system and is respectively connected to the main airbag and the elastic inner bag of the air spring. The control component is arranged on the air supply pipeline, and the control component is used to control the on and off of the air supply pipeline to inflate or deflate the main airbag and the elastic inner bag respectively.

[0026] The air spring and vehicle provided in the present application are characterized in that the air spring is connected to the vehicle body through a first shell by setting a shell assembly, a shock absorbing assembly, an airbag assembly and a control assembly, and the shock absorbing assembly passes through the bottom of the second shell and is connected to the wheel of the vehicle. The airbag assembly is provided with a main airbag and an elastic inner bag, and the shock absorbing assembly moves in a vertical direction under the action of the main airbag and the elastic inner bag, so that the shock absorbing assembly can reduce the impact force generated between the vehicle body and the wheel under the action of the main airbag and the elastic inner bag, thereby achieving the effect of shock absorption and buffering. Furthermore, the main airbag is assembled on the top of the shock absorbing assembly, the elastic inner bag is telescopically assembled in the first shell, and the control assembly controls the on-off between the air supply system and the main airbag and the elastic inner bag respectively, so that the air supply system inflates or deflates the main airbag and the elastic inner bag respectively, so that the elastic inner bag can adjust the corresponding gas volume in different vehicle usage scenarios, thereby changing the supporting effect of the elastic inner bag on the first shell, and can better adjust the stiffness of the air spring under different road surfaces or vehicle conditions in real time on the basis of the buffering effect, thereby improving driving and riding comfort and enhancing user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0028] Figure 1 Shown is a schematic diagram of an embodiment of the air spring of the present application.

[0029] Figure 2 Shown Figure 1 A cross-sectional view of one embodiment of an air spring.

[0030] Description of reference numerals:

[0031] Air spring 100; air supply system 200; on-board controller 300; air supply pipeline 400; first pipeline 410; second pipeline 420; third pipeline 430; control component 1; first port 11; second port 12; third port 13; housing assembly 2; first housing 21; elastic member 211; housing seal 212; second housing 22; airbag assembly 3; main airbag 31; airbag main body 311; airbag ring body 312; elastic inner bag 32; connecting airbag 33; air hole 331; switching switch 34; support member 35; shock absorber assembly 4; piston 41; piston main body 411; piston tilting portion 412; piston mounting portion 413; shock absorber 42; piston seal 43; cylinder 5; dust cover 6; chassis 7; first mounting portion 71; second mounting portion 72. DETAILED DESCRIPTION

[0032] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of devices consistent with certain aspects of the present application, as detailed in the appended claims.

[0033] The terminology used in this application is for the purpose of describing specific embodiments only and is not intended to limit this application. Unless otherwise defined, technical or scientific terms used in this application should have the same ordinary meaning as understood by a person of ordinary skill in the art to which this application belongs. The use of "a," "an," and similar terms in this specification and claims does not indicate a limitation of quantity, but rather indicates the presence of at least one. "A plurality" includes two and is equivalent to at least two. "Includes" or "comprising" and similar terms mean that the elements or objects preceding "includes" or "comprising" include the elements or objects listed after "includes" or "comprising," and their equivalents, and do not exclude other elements or objects. "Connected" or "connected" and similar terms are not limited to physical or mechanical connections and may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0034] The present application provides an air spring, which is assembled in a vehicle and includes a shell assembly, a shock absorbing assembly, an airbag assembly and a control assembly. The shell assembly includes a first shell and a second shell separated in a vertical direction. The first shell is used to connect to the body of the vehicle, and the second shell is used to connect to the wheel of the vehicle; the shock absorbing assembly is assembled in the second shell, passes through the bottom of the second shell, and extends outside the second shell to be connected to the wheel; the airbag assembly includes a main airbag and an elastic inner bag, the main airbag is assembled at the top of the shock absorbing assembly, the main airbag is partially located in the second shell, and partially protrudes upward on the top of the second shell and abuts against the bottom of the first shell; the elastic inner bag is telescopically assembled in the first shell; the control assembly is used to connect to the air supply system, and is respectively connected to the main airbag and the elastic inner bag. The control assembly is used to control the connection and disconnection between the air supply system and the main airbag and the elastic inner bag, so that the air supply system inflates or deflates the main airbag and the elastic inner bag respectively, and the shock absorbing assembly moves in the vertical direction under the action of the main airbag and the elastic inner bag.

[0035] The air spring and vehicle provided herein are connected to the vehicle body via a first housing, and a shock-absorbing assembly extends from the bottom of a second housing and is connected to the vehicle's wheels. The shock-absorbing assembly moves vertically under the action of a main airbag and an elastic inner bladder, thereby mitigating the impact force generated between the vehicle body and the wheel, achieving both shock absorption and cushioning. Furthermore, the main airbag is assembled at the top of the shock-absorbing assembly, and the elastic inner bladder is retractably assembled within the first housing. A control assembly controls the connection and disconnection between an air supply system and the main airbag and the elastic inner bladder, causing the air supply system to inflate or deflate the main airbag and the elastic inner bladder, respectively. This allows the elastic inner bladder to adjust the corresponding gas volume in different vehicle usage scenarios, thereby varying the support provided by the elastic inner bladder to the first housing. This allows the air spring's stiffness to be adjusted in real time under different road conditions or vehicle load conditions, while also providing a better cushioning effect. This improves driving and riding comfort, enhancing the user experience.

[0036] The present application provides an air spring and a vehicle. The air spring and the vehicle of the present application are described in detail below with reference to the accompanying drawings. The features of the following embodiments and implementations may be combined with each other unless they conflict.

[0037] Figure 1 FIG. 1 is a schematic diagram of an embodiment of an air spring 100 of the present application. Figure 2 Shown Figure 1 FIG. 1 is a cross-sectional view of an embodiment of an air spring 100 .

[0038] exist Figure 1 and Figure 2In the illustrated embodiment, the vehicle includes a vehicle body, a plurality of wheels, an air spring 100, and an air supply system 200. The plurality of wheels are provided at the bottom of the vehicle body. The air supply system 200 is provided at the vehicle body. The air supply system 200 is used to supply air to the air spring 100, and the air supply system 200 can be assembled inside the vehicle body. The air spring 100 is assembled at the vehicle. The air supply system 200 is connected to the control assembly 1 of the air spring 100, the first shell 21 of the air spring 100 is connected to the vehicle body, and the second shell 22 of the air spring 100 is connected to the wheel. In this embodiment, the air spring 100 is used to cushion the impact force generated between the vehicle body and the wheel when the vehicle encounters different usage scenarios. The vehicle includes an air supply line 400. The air supply line 400 is used to be connected to the air supply system 200, and is respectively in communication with the main airbag 31 and the elastic inner bag 32 of the air spring 100. In this embodiment, the air supply system 200 is connected to the main airbag 31 via an air supply line 400, and the air supply system 200 is also connected to the elastic inner bag 32 via the air supply line 400. This arrangement makes air supply by the air supply system 200 more convenient and facilitates the assembly and layout of internal vehicle body devices. The control assembly 1 is disposed in the air supply line 400. In this embodiment, the air supply line 400 includes a first line 410, a second line 420, and a third line 430. The first line 410 connects the air supply system 200 and the control assembly 1, the second line 420 connects the control assembly 1 and the elastic inner bag 32, and the third line 430 connects the control assembly 1 and the main airbag 31. This arrangement facilitates vehicle assembly and layout. The first line 410, the second line 420, and the third line 430 are independently arranged and controlled, without interfering with each other. This facilitates inflation or deflation of each line, providing high flexibility and adaptability. The control assembly 1 is used to control the opening and closing of the air supply line 400 to inflate or deflate the main airbag 31 and the elastic inner bag 32, respectively. In this embodiment, the control assembly 1 includes a first port 11, a second port 12, and a third port 13. The first port 11 is connected to the first line 410, the second port 12 is connected to the second line 420, and the third port 13 is connected to the third line 430. When the control assembly 1 switches the first port 11 to connect to the second port 12, the air supply system 200 can inflate or deflate the elastic inner bag 32 through the first line 410 and the second line 420. When the control assembly 1 switches the first port 11 to connect to the third port 13, the air supply system 200 can inflate or deflate the main airbag 31 through the first line 410 and the third line 430. This configuration allows the control assembly 1 to switch between different ports based on the stiffness requirements of the air spring 100, allowing the air supply system 200 to inflate or deflate the elastic inner bladder 32 and the main airbag 31 within the air spring 100. The vehicle also includes an onboard controller 300, which can be an onboard ECU (Electronic Control Unit).The onboard controller 300 is connected to the control assembly 1 of the air spring 100 and is used to control the opening or closing of the control assembly 1, thereby allowing the air supply system 200 to supply gas to the main airbag 31 and elastic inner airbag 32 of the airbag assembly 3 of the air spring 100. The onboard controller 300 controls the opening or closing of the control assembly 1 of the air spring 100. In this embodiment, the onboard controller 300 can control the control assembly 1 to switch the first port 11 to connect with the second port 12, or to switch the first port 11 to connect with the third port 13. This allows for more intelligent and convenient inflating or deflating of the elastic inner airbag 32 and main airbag 31 of the air spring 100 according to different user needs, thereby meeting the vehicle's desired stiffness requirements for the air spring 100 under different vehicle conditions. In this embodiment, the control assembly 1 is a solenoid valve switch located in the air supply line 400. The onboard controller 300 is used to control the opening or closing of the solenoid valve switch to control the on-off state of the air supply line 400.

[0039] exist Figure 1 and Figure 2In the illustrated embodiment, the air spring 100 includes a housing assembly 2, a shock absorber assembly 4, an airbag assembly 3, and a control assembly 1. The housing assembly 2 includes a first housing 21 and a second housing 22, which are separated in a vertical direction. The first housing 21 is used to connect to the vehicle body, and the second housing 22 is used to connect to the vehicle wheels. The first housing 21 and the second housing 22 are used to protect the components within the air spring 100. The shock absorber assembly 4 is assembled within the second housing 22, passes through the bottom of the second housing 22, and extends outside the second housing 22 to connect to the wheel. The shock absorber assembly 4 passes through the bottom of the second housing 22, which facilitates connection to the wheel. The airbag assembly 3 includes a main airbag 31 and an elastic inner airbag 32. The main airbag 31 is assembled at the top of the shock absorber assembly 4. The main airbag 31 is partially located within the second housing 22 and partially protrudes upward from the top of the second housing 22 and abuts the bottom of the first housing 21. The first shell 21 and the second shell 22 are in a separated state, and the main airbag 31 includes, from top to bottom, a portion that is in contact with or fixed to the first shell 21, a portion that is not in contact with the first shell 21 and the second shell 22, and a portion that is in contact with the inner wall of the second shell 22. Among them, the portion of the main airbag 31 that is not in contact with the first shell 21 and the second shell 22 is elastic in the vertical direction, so that the main airbag 31 has more buffering margin or elasticity in the vertical direction, which can further improve the shock absorption effect. The elastic inner capsule 32 is telescopically assembled in the first shell 21. In this embodiment, the elastic inner capsule 32 can be telescopic in the vertical direction and can also be telescopic in the horizontal direction. The control component 1 is used to connect to the air supply system 200, and is connected to the main airbag 31 and the elastic inner capsule 32 respectively. The control assembly 1 is used to control the connection and disconnection between the air supply system 200 and the main airbag 31 and the elastic inner bag 32, respectively, so that the air supply system 200 can inflate or deflate the main airbag 31 and the elastic inner bag 32, respectively. The shock absorber assembly 4 moves vertically under the action of the main airbag 31 and the elastic inner bag 32. In this configuration, the shock absorber assembly 4 is connected to the vehicle body through the first housing 21, and the shock absorber assembly 4 extends from the bottom of the second housing 22 and connects to the vehicle wheel. The shock absorber assembly 4 moves vertically under the action of the main airbag 31 and the elastic inner bag 32, so that the shock absorber assembly 4 can reduce the impact force generated between the vehicle body and the wheel under the action of the main airbag 31 and the elastic inner bag 32, thereby achieving a shock absorption and cushioning effect.Furthermore, the main airbag 31 is assembled on the top of the shock absorbing assembly 4, and the elastic inner bag 32 is telescopically assembled in the first shell 21, and the control assembly 1 controls the on-off between the air supply system 200 and the main airbag 31 and the elastic inner bag 32 respectively, so that the air supply system 200 inflates or deflates the main airbag 31 and the elastic inner bag 32 respectively, so that the elastic inner bag 32 can adjust the corresponding gas volume in different vehicle usage scenarios, thereby changing the supporting effect of the elastic inner bag 32 on the first shell 21, and can better adjust the stiffness of the air spring 100 under different road surfaces or vehicle conditions in real time on the basis of the buffering effect, thereby improving driving and riding comfort and improving user experience.

[0040] exist Figure 1 and Figure 2 In the illustrated embodiment, the airbag assembly 3 also includes a connecting airbag 33, assembled within the first housing 21 and located at the bottom of the elastic inner bag 32. This arrangement provides support between the elastic inner bag 32 and the main airbag 31, enhancing the vertical support of the air spring 100. Furthermore, the connecting airbag 33 also provides adaptable stiffness, further enhancing the cushioning effect of the air spring 100. In other embodiments, a support bracket may be provided between the elastic inner bag 32 and the main airbag 31 for support, but this is not limited to this. The connecting airbag 33 includes at least one air hole 331, which connects the main airbag 31 and the elastic inner bag 32. In this embodiment, there is only one air hole 331. In other embodiments, the number of air holes 331 may be more than one, such as two, three, or four, but this number is not limited to this. The air spring 100 also includes at least one switch 34, which is located at the air hole 331. In this embodiment, the number of air holes 331 can be matched to the number of switches 34. The switches 34 are used to control the opening or closing of the air holes 331, thereby controlling the connection between the main airbag 31 and the elastic inner bag 32. In this embodiment, the switches 34 can be solenoid valves, which can be controlled to open or close by the vehicle controller 300. This configuration allows the air holes 331 to be opened or closed according to the vehicle's driving state and load, thereby allowing the stiffness of the air spring 100 to be adjusted in real time according to the actual use scenario, expanding its application scenarios and improving driving and riding comfort.

[0041] In this embodiment, the air spring 100 is configured to multiple positions based on the force required by the vehicle's wheels. When the vehicle's wheels require the greatest force, the air spring 100 is controlled to the first position, which correspondingly opens the control assembly 1. The elastic inner bladder 32 and the main airbag 31 are inflated via the air supply system 200, and the switch 34 is closed. When the vehicle's wheels require moderate force, the air spring 100 is controlled to the second position. The control assembly 1 is opened, the air supply system 200 inflates the main airbag 31, but does not inflate the elastic inner bladder 32. The switch 34 is closed. When the vehicle's wheels require less force, the air spring 100 is controlled to the third gear, correspondingly opening the control assembly 1, and the air supply system 200 fully inflates the main airbag 31. The air supply system 200 then partially inflates the elastic inner bag 32. The switch 34, which was in the closed state, is opened, allowing some of the gas in the main airbag 31 to be discharged and enter the elastic inner bag 32. The amount of gas that the air supply system 200 fills the elastic inner bag 32 depends on demand. The smaller the force required by the wheel, the less gas is filled into the elastic inner bag 32. When the vehicle's wheels require minimal force, the air spring 100 is controlled to the fourth gear, correspondingly opening the control assembly 1, and the air supply system 200 fully inflates the main airbag 31, but does not inflate the elastic inner bag 32. The switch 34, which was in the closed state, is opened, allowing some of the gas in the main airbag 31 to be discharged and enter the elastic inner bag 32.

[0042] exist Figure 2In the illustrated embodiment, the air spring 100 further includes an elastic member 211, which is assembled in the first shell 21, and the elastic member 211 extends downward from the top wall of the first shell 21 and extends into the main air bag 31 through the connecting air bag 33. This arrangement allows the elastic member 211 to be supported by the gas in the main air bag 31. The elastic inner bag 32 and the connecting air bag 33 are both located on the circumferential side of the elastic member 211. This arrangement allows the elastic member 211 to be supported by the elastic inner bag 32 and the connecting air bag 33. And this layout makes the structure in the air spring 100 more compact. The air spring 100 further includes a shell seal 212, which is assembled in the first shell 21 and is located on the top of the elastic member 211. The housing seal 212 is disposed inside the first housing 21, and the first housing 21 is connected to the vehicle body. This configuration allows the housing seal 212 to ensure the sealing of the air spring 100 toward the vehicle body, preventing moisture or impurities from entering the interior of the air spring 100. Furthermore, the housing seal 212 is located on top of the elastic member 211, which can further ensure the sealing of the top of the elastic member 211. In this embodiment, the housing seal 212 can be a component with sealing properties such as a sealing ring. When the shock absorber assembly 4 moves upward in the vertical direction under the action of the main airbag 31 and the elastic inner bag 32, it abuts against the bottom of the elastic member 211. The elastic member 211 can be any material with elastic properties. The elastic member 211 is used to cushion the impact force caused by the upward movement of the shock absorber assembly 4. Setting it as a material with elastic properties has a better cushioning effect.

[0043] exist Figure 2In the illustrated embodiment, the main airbag 31 includes an airbag body 311 and an airbag ring 312 disposed at the bottom of the airbag body 311 and in communication with the airbag body 311. In this embodiment, both the airbag body 311 and the airbag ring 312 are part of the main airbag 31. The airbag body 311 is located at the top of the shock absorber assembly 4, while the airbag ring 312 is nestled between the outer circumferential wall of the shock absorber assembly 4 and the inner circumferential wall of the second housing 22. In this embodiment, the top portion of the airbag ring 312, located on the side closest to the shock absorber assembly 4, is assembled and fixed to the shock absorber assembly 4. This arrangement reduces the influence and restriction of the airbag ring 312 on the vertical movement of the shock absorber assembly 4. The airbag ring 312 is located within the second housing 22, with a portion of the airbag body 311 located within the second housing 22 and a portion protruding from the top of the second housing 22 and located at the bottom of the first housing 21. In this embodiment, the airbag main body 311 includes, from top to bottom, a portion that abuts or is fixed to the first shell 21, a portion that is not in contact with the first shell 21 and the second shell 22, and a portion that abuts the inner wall of the second shell 22. The outer wall of the airbag ring body 312 abuts the inner wall of the second shell 22 from top to bottom. This arrangement makes the structure of the air spring 100 more compact and increases the volume of the main airbag 31 as much as possible, so that more capacity of the main airbag 31 is filled with gas. The airbag assembly 3 also includes a support member 35, which extends in the horizontal direction and is located between the airbag main body 311 and the airbag ring body 312. The end of the support member 35 contacts the inner wall of the airbag main body 311 in the horizontal direction. The support member 35 is used to support the interior of the main airbag 31 in the horizontal direction. In this embodiment, the support member 35 is disposed at the top of the shock absorbing assembly 4, and the end of the support member 35 contacts the inner side wall of the airbag main body 311 in the horizontal direction, so that the support member 35 can support the interior of the main airbag 31 in the horizontal direction while moving up and down with the shock absorbing assembly 4, thereby preventing the bag skin of the main airbag 31 from collapsing in the horizontal direction. In some other embodiments, the support member 35 can also be a support ring, which is sleeved inside the main airbag 31 and abuts against the inner side wall of the airbag main body 311. The support ring is a hollow structure in the vertical direction, and the shock absorbing assembly 4 can move in the vertical direction through the support ring. This configuration allows the support ring to support the interior of the main airbag 31 without affecting the movement of the shock absorbing assembly 4, and the support effect is good.

[0044] exist Figure 2In the illustrated embodiment, the shock absorber assembly 4 includes a piston 41 and a shock absorber 42 mounted within the piston 41. The piston 41 is assembled with the primary airbag 31, while the shock absorber 42 moves vertically to provide shock absorption. The piston 41 is assembled to the bottom of the airbag body 311 and located within the airbag annular portion 312. In this embodiment, the top of the piston 41 is assembled to the top of the inner side of the airbag annular portion 312. The piston 41 is hollow, which reduces the overall weight of the air spring 100. The side of the piston 41 near the primary airbag 31 has a thickness in the vertical direction. This configuration ensures greater stability when the piston 41 and shock absorber 42 are installed and less susceptible to damage during the shock absorption process. The shock absorber 42 extends into the airbag body 311 at one end facing the first housing 21, while the shock absorber 42 extends from the bottom of the second housing 22 at the other end facing the second housing 22 and extends outside the second housing 22 to connect to the wheel. This arrangement facilitates connection of the shock absorber 42 to the wheel, resulting in a more stable structure and a more robust shock absorption process after installation. Under the action of the airbag main body 311 and the airbag annular body 312, the shock absorber 42 drives the piston 41 to move vertically. This arrangement simplifies the structure and the shock absorption process. When the main airbag 31 is inflated, the volume of the main airbag 31 increases, driving the piston 41 and shock absorber 42 downward. When the main airbag 31 is deflated, the volume of the main airbag 31 decreases, driving the piston 41 and shock absorber 42 upward.

[0045] exist Figure 2In the illustrated embodiment, the piston 41 includes a main piston portion 411 and a sloping piston portion 412 disposed at the bottom of the main piston portion 411. In this embodiment, the main piston portion 411 and the sloping piston portion 412 are integrally formed. The top of the main piston portion 411 is assembled with the top of the inner side of the airbag ring portion 312 of the primary airbag 31. The main piston portion 411 extends vertically, and the sloping piston portion 412 is inclined downward from the bottom of the main piston portion 411, away from the central axis of the shock absorber 42, toward the central axis of the shock absorber 42. This arrangement gives the sloping piston portion 412 a conical structure, which is more stable and compact, reducing the space occupied by the air spring 100. In this embodiment, the piston 41 also includes a piston mounting portion 413 extending vertically downward from the bottom of the sloping piston portion 412. The piston mounting portion 413 is used for assembly with the second housing 22, facilitating assembly and disassembly. The shock absorber assembly 4 also includes a piston seal 43, which is assembled between the inner sidewall of the piston 41 and the outer sidewall of the shock absorber 42. This arrangement seals the inner sidewall of the piston 41 and the outer sidewall of the shock absorber 42, ensuring a tight seal on the other side of the air spring 100 and preventing moisture or impurities from entering the interior of the air spring 100 from the other side. In this embodiment, a gap is provided between the inner sidewall of the piston mounting portion 413 and the outer sidewall of the shock absorber 42, and the piston seal 43 is positioned in this gap. This arrangement improves sealing performance and facilitates assembly. In this embodiment, the piston seal 43 is an O-ring, but other sealing structures can also be used, without limitation. The second housing 22 includes a cylinder 5, a dust cover 6, and a chassis 7. The cylinder 5 is used to encase the outer circumference of the main airbag 31. In this embodiment, the cylinder 5 can be an aluminum sleeve. The dust cover 6 prevents dust from entering the air spring 100. The cylinder 5 extends vertically and abuts the airbag ring portion 312 and part of the airbag main body 311 in the horizontal direction. This arrangement protects the airbag ring portion 312 and part of the airbag main body 311, making the main airbag 31 more stable. In this embodiment, the bottom of the airbag ring portion 312 is spaced apart from the top of the dust cover 6, and the top of the shock absorber 42 is spaced apart from the bottom of the elastic member 211. This arrangement ensures that there is a margin between the bottom of the airbag ring portion 312 and the top of the dust cover 6, and does not restrict the vertical movement of the shock absorber 42. When the top of the shock absorber 42 contacts the bottom of the elastic member 211, the bottom of the airbag ring portion 312 contacts the top of the dust cover 6. The dust cover 6 is telescopically assembled to the bottom of the cylinder 5. This arrangement ensures that the dust cover 6 does not affect the vertical movement of the shock absorber assembly 4. The dust cover 6 is tilted downward from the bottom of the cylinder 5 , away from the central axis of the shock absorber 42 , toward the central axis of the shock absorber 42 .Such an arrangement enables the dust cover 6 to be matched with the piston inclined portion 412 of the piston 41, resulting in a compact structure and good dustproof effect. The chassis 7 is assembled at the bottom of the dust cover 6 and is connected to the shock absorber assembly 4. Such an arrangement facilitates assembly and makes the dust cover 6 more stable. In this embodiment, the chassis 7 includes a first mounting portion 71 extending from the radial direction of the shock absorber 42 and a second mounting portion 72 extending from the axial direction of the shock absorber 42. The first mounting portion 71 is assembled with the bottom of the dust cover 6, and the second mounting portion 72 is assembled with the shock absorber 42. The piston seal 43 is arranged close to the chassis 7. Such an arrangement ensures that the bottom position of the air spring 100 is more tightly sealed.

[0046] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An air spring assembled in a vehicle, characterized in that: include: A housing assembly comprising a first housing and a second housing separated in a vertical direction, wherein the first housing is used to connect to a vehicle body, and the second housing is used to connect to a wheel of the vehicle; a shock absorbing assembly assembled in the second shell, passing through the bottom of the second shell, and extending outside the second shell to be connected to the wheel; An airbag assembly comprising a main airbag and an elastic inner airbag, wherein the main airbag is assembled on top of the shock absorbing assembly, the main airbag being partially located within the second shell and partially protruding upward from the top of the second shell and abutting against the bottom of the first shell; the elastic inner airbag being telescopically assembled within the first shell; and A control component is used to connect the air supply system and is respectively connected to the main airbag and the elastic inner bag. The control component is used to control the connection and disconnection between the air supply system and the main airbag and the elastic inner bag respectively, so that the air supply system inflates or deflates the main airbag and the elastic inner bag respectively. The shock absorbing component moves in the vertical direction under the action of the main airbag and the elastic inner bag.

2. The air spring according to claim 1, wherein: The airbag assembly also includes a connecting airbag, which is assembled in the first shell and located at the bottom of the elastic inner bag; the connecting airbag includes at least one air hole, which connects the main airbag and the elastic inner bag; the air spring also includes at least one switching switch, which is provided at the air hole and is used to control the opening or closing of the air hole to control the connection between the main airbag and the elastic inner bag.

3. The air spring according to claim 2, wherein: The air spring further includes an elastic member assembled to the first housing, and the elastic member extends downward from the top wall of the first housing and extends through the connecting airbag into the main airbag, and the elastic inner bag and the connecting airbag are both located around the elastic member; When the shock absorbing assembly moves upward in the vertical direction under the action of the main airbag and the elastic inner bag, it abuts against the bottom of the elastic member; and / or The air spring further includes a housing seal assembled in the first housing and located on top of the elastic member.

4. The air spring according to claim 2, wherein: The main airbag includes an airbag main body and an airbag ring body arranged at the bottom of the airbag main body and connected to the airbag main body. The airbag main body is located at the top of the shock absorbing assembly, and the airbag ring body is arranged between the outer peripheral wall of the shock absorbing assembly and the inner peripheral wall of the second shell.

5. The air spring according to claim 4, characterized in that The airbag assembly further includes a support member extending in a horizontal direction and located between the airbag main body and the airbag ring body; an end portion of the support member contacts the inner side wall of the airbag main body in a horizontal direction; and / or The airbag ring body is located in the second shell, a portion of the airbag main body is located in the second shell, and a portion is protruded from the top of the second shell and located at the bottom of the first shell.

6. The air spring according to claim 4, wherein: The shock absorbing assembly includes a piston and a shock absorber sleeved in the piston. The piston is assembled at the bottom of the airbag main body and is located in the airbag ring body. The shock absorber extends into the airbag main body toward one end of the first shell, and passes through the bottom of the second shell toward one end of the second shell, and extends to the outside of the second shell to connect with the wheel. Under the action of the airbag main body and the airbag ring body, the shock absorber drives the piston to move in the vertical direction.

7. The air spring according to claim 6, characterized in that The piston includes a piston body and a piston inclined portion arranged at the bottom of the piston body. The piston body extends in a vertical direction, and the piston inclined portion is inclined from the bottom of the piston body from top to bottom, along the direction away from the central axis of the shock absorber toward the direction close to the central axis of the shock absorber.

8. The air spring according to claim 6, wherein: The second shell includes a cylinder, a dust cover and a chassis, the cylinder extends in a vertical direction and abuts against the airbag ring portion and part of the airbag main body portion in a horizontal direction, the dust cover is telescopically assembled to the bottom of the cylinder, and is inclined from the bottom of the cylinder from top to bottom, along a direction away from the central axis of the shock absorber toward a direction close to the central axis of the shock absorber, the chassis is assembled to the bottom of the dust cover and connected to the shock absorbing assembly; and / or The second housing includes a chassis, and the shock absorbing assembly further includes a piston seal assembled between the inner side wall of the piston and the outer side wall of the shock absorber, and the piston seal is arranged close to the chassis.

9. A vehicle, characterized in that: include: A vehicle body and a plurality of wheels disposed at the bottom of the vehicle body; an air supply system, provided on the vehicle body; and According to any one of claims 1 to 8 , the air supply system is connected to a control assembly of the air spring, the first housing of the air spring is connected to the vehicle body, and the second housing of the air spring is connected to the wheel.

10. The vehicle according to claim 9, characterized in that The vehicle further includes an on-board controller connected to the control assembly of the air spring, and configured to control the opening or closing of the control assembly so as to allow the air supply system to supply gas to the main airbag and the elastic inner bag of the airbag assembly of the air spring; and / or The vehicle includes an air supply pipeline, which is used to be connected to the air supply system and is respectively communicated with the main airbag and the elastic inner bag of the air spring. The control component is arranged on the air supply pipeline, and the control component is used to control the on and off of the air supply pipeline to inflate or deflate the main airbag and the elastic inner bag respectively.

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