Bladder skin structure, air spring, suspension system and vehicle

Abstract

The application relates to a bladder skin structure, an air spring, a suspension system and a vehicle. The bladder skin structure comprises a bladder skin assembly and a tension assembly. The bladder skin assembly has a first bladder skin and a second bladder skin sleeved on the periphery of the first bladder skin. The tension assembly is connected between the first bladder skin and the second bladder skin. Thus, the radial strength of the bladder skin assembly can be improved, so that the supporting capacity of the bladder skin assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of suspension, in particular to a bladder skin structure, an air spring, a suspension system and a vehicle. BACKGROUND

[0002] In the related art, air springs are widely used in the suspension systems of vehicles. The bladder skin structure of an air spring can form a sealed cavity with a piston, a base and the like, and the adjustment of the air spring is realized by the stretching of the bladder skin structure. However, due to the limitation of the production process, the air tightness of the bladder skin structure is insufficient, and after the air spring is used for a long time, the bladder skin structure may be deflated or aged, which can cause insufficient supporting force and stability of the air spring, and the air spring can be disabled. The disability of the air spring can cause the decrease of the stiffness and the load capacity of the air spring, and the supporting requirement cannot be met. SUMMARY

[0003] The present application provides a bladder skin structure, an air spring, a suspension system and a vehicle, which improve the supporting force and the stability of the bladder skin structure to at least partially solve the above technical problems.

[0004] In order to achieve the above-mentioned purpose, according to a first aspect of the present application, a bladder skin structure is provided, comprising:

[0005] a bladder skin assembly having a first bladder skin and a second bladder skin sleeved on the periphery of the first bladder skin;

[0006] a tensioning assembly connected between the first bladder skin and the second bladder skin.

[0007] Optionally, the tensioning assembly comprises:

[0008] a first tensioning member connected between the first bladder skin and the second bladder skin;

[0009] a second tensioning member connected between the first bladder skin and the second bladder skin and arranged in cross with the first tensioning member.

[0010] Optionally, the included angle between the first tensioning member and the second tensioning member is α, and 0° < α ≤ 30° is satisfied.

[0011] Optionally, the tensioning assembly is provided as at least two, wherein the at least two tensioning assemblies are arranged in the axial direction of the bladder skin assembly, and the at least two tensioning assemblies are arranged in the circumferential direction of the bladder skin assembly; and / or

[0012] the tensioning assembly is provided as at least two groups, each group of the tensioning assembly comprises at least two tensioning assemblies, the tensioning assemblies in each group are arranged in the circumferential direction of the bladder skin assembly, and the at least two groups of the tensioning assemblies are arranged in the axial direction of the bladder skin assembly.

[0013] Optionally, the bladder skin structure further comprises:

[0014] a support assembly connected between the first bladder skin and the second bladder skin, the support assembly being spaced apart from the tension assembly along an axial direction of the bladder skin assembly.

[0015] According to a second aspect of the present application, there is provided an air spring, comprising:

[0016] a bladder skin structure as described above;

[0017] a piston assembly sealingly connected to the first bladder skin;

[0018] a fixed seat sealingly connected to the second bladder skin;

[0019] wherein the bladder skin structure, the piston assembly and the fixed seat enclose a sealed cavity.

[0020] Optionally, the first bladder skin is configured with a first clamping structure, and the piston assembly is configured with a second clamping structure clamped with the first clamping structure, wherein one of the first clamping structure and the second clamping structure is a first clamping structure, and the other is a clamping groove.

[0021] Optionally, the first bladder skin has a constraint portion located in the cavity, the constraint portion being connected with the first clamping structure, and the tension assembly is connected between the constraint portion and the second bladder skin.

[0022] Optionally, the second bladder skin is configured with a connecting portion extending towards the fixed seat, the connecting portion being sealingly connected with the fixed seat.

[0023] Optionally, the connecting portion is sealingly connected with the fixed seat by a first fastener.

[0024] Optionally, the fixed seat comprises:

[0025] a first seat body formed with a connecting region;

[0026] a second seat body connected with the first seat body, the second seat body having a bent portion extending towards the connecting region;

[0027] a sealing ring provided in the connecting region, the sealing ring being spaced apart from the bent portion;

[0028] wherein the connecting portion is abutted between the sealing ring and the bent portion, and the first seat body is connected with the bent portion by a second fastener.

[0029] According to a third aspect of the present application, there is further provided a suspension system, comprising an air spring as described above.

[0030] According to a fourth aspect of the present application, there is also provided a vehicle comprising a suspension system as described above.

[0031] In the bladder skin structure, the air spring, the suspension system and the vehicle of the embodiments of the present application, the tensioning assembly is arranged between the first bladder skin and the second bladder skin, and the tensioning assembly can connect the first bladder skin and the second bladder skin, and can improve the radial strength of the bladder skin assembly, thereby improving the supporting capacity of the bladder skin assembly. When the bladder skin assembly is aging or deflated, the bladder skin assembly can still have sufficient supporting force under the action of the tensioning assembly, and the stability of the air spring is ensured, so that the air spring has greater rigidity, higher structural strength and better stability.

[0032] Other features and advantages of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0034] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0035] Figure 1 is a schematic diagram of the three-dimensional structure of the air spring provided in the exemplary embodiments of the present application;

[0036] Figure 2 is one of the cross-sectional views of the air spring provided in the exemplary embodiments of the present application;

[0037] Figure 3 is the second cross-sectional view of the air spring provided in the exemplary embodiments of the present application;

[0038] Figure 4 is an enlarged schematic diagram of part A in Figure 3

[0039] Figure 5 is an enlarged schematic diagram of part B in Figure 3

[0040] Figure 6 is a cross-sectional view of section C-C in Figure 3

[0041] Explanation of reference numerals:

[0042] ​​​1. Capsule skin assembly; 11. First capsule skin; 111. First snap-fit ​​structure; 112. Constraint part; 12. Second capsule skin; 121. Connecting part; 13. Third capsule skin;

[0043] 2. Tensioning assembly; 21. First tensioning member; 22. Second tensioning member;

[0044] 3. Support components;

[0045] 4. Piston assembly; 41. Second snap-fit ​​structure;

[0046] 5. Fixing base; 51. First base body; 511. Connecting area; 52. Second base body; 521. Bending part; 53. Sealing ring;

[0047] 61. First fastener; 62. Second fastener. Detailed Implementation

[0048] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0049] Air springs are widely used in vehicle suspension systems, allowing for adjustments to both the height and ride height of the vehicle. The air spring's bladder structure is a crucial component; the bladder's range of extension defines the air spring's adjustment range. By injecting air into the bladder's cavity, the volume or pressure of the cavity can be changed, utilizing the gas's elasticity to create air springs with varying stiffnesses.

[0050] In related technologies, due to limitations in manufacturing processes, the airtightness of the bladder structure is insufficient. After prolonged use, the bladder structure will experience air leakage and aging, leading to insufficient support force and stability, and ultimately, air spring failure. Failure of the air spring will reduce its stiffness and load-bearing capacity, making it unable to meet support requirements.

[0051] like Figures 1 to 6 As shown, according to a first aspect of this application, this application provides a scabbard structure. The scabbard structure includes a scabbard assembly 1 and a tensioning assembly 2. The scabbard assembly 1 has a first scabbard 11 and a second scabbard 12 sleeved around the first scabbard 11. The tensioning assembly 2 is connected between the first scabbard 11 and the second scabbard 12.

[0052] In the embodiment of the present application, the tensioning assembly 2 is arranged between the first bladder skin 11 and the second bladder skin 12, and the tensioning assembly 2 can connect the first bladder skin 11 and the second bladder skin 12, thereby improving the radial strength of the bladder skin assembly 1 and the supporting capacity of the bladder skin assembly 1. When the bladder skin assembly 1 is aging or deflated, the bladder skin assembly 1 still has sufficient supporting force under the action of the tensioning assembly 2, thereby ensuring the stability of the air spring and making the air spring have greater rigidity, higher structural strength and better stability.

[0053] It can be understood that the tensioning assembly 2 is connected between the first bladder skin 11 and the second bladder skin 12, thereby improving the supporting capacity of the bladder skin assembly 1. When the bladder skin assembly 1 is aging or deflated, the aging and deflation can reduce the influence of the bladder skin assembly 1, and the air spring can still maintain good structural strength, thereby having high stability and durability. Thus, the situation that the vehicle body is lowered to the lowest state and cannot be used completely due to the aging or deflation of the bladder skin assembly 1 can be effectively avoided, and the practicability of the air spring is improved.

[0054] In addition, after the tensioning assembly 2 improves the supporting force of the bladder skin assembly 1, the deflation process of the bladder skin assembly 1 can be slowed down, and the influence of the deflation on the air spring can be reduced. Thus, the use of the tensioning assembly 2 can also reduce the air tightness requirement of the air spring and make the air spring have strong durability.

[0055] Compared with the air spring with the same volume and height in the related art, the adjustable rigidity of the air spring using the bladder skin structure can be improved, thereby improving the carrying capacity and stability of the air spring during use. Meanwhile, based on the improvement of the supporting performance of the bladder skin assembly 1 by the tensioning assembly 2, the situation that the air spring is damaged due to severe vibration during use can be effectively avoided.

[0056] In some embodiments, the tensioning assembly 2 is made of a flexible material, so that the tensioning assembly 2 has a flexible supporting effect. For example, the tensioning assembly 2 and the bladder skin assembly 1 are made of the same material. In addition, the tensioning assembly 2 and the bladder skin assembly 1 are integrally formed. For example, the tensioning assembly 2 and the bladder skin assembly 1 are both made of rubber.

[0057] As shown in Figure 2 and Figure 3 , the first bladder skin 11 is an inner bladder skin of the bladder skin assembly 1, and the second bladder skin 12 is an outer bladder skin of the bladder skin assembly 1. As shown in Figure 6 , the first bladder skin 11 and the second bladder skin 12 are both arranged in a substantially cylindrical structure. The diameter of the first bladder skin 11 is smaller than the diameter of the second bladder skin 12, so that the first bladder skin 11 can be arranged in the second bladder skin 12.

[0058] Please continue to refer to Figure 2and Figure 3 The capsule skin assembly 1 can further include a third capsule skin 13. The third capsule skin 13 is used to connect the first capsule skin 11 and the second capsule skin 12, so as to form a closed capsule skin assembly 1. The third capsule skin 13 is arranged in a circular ring shape, so that the two ends of the third capsule skin 13 are connected with the first capsule skin 11 and the second capsule skin 12 respectively. The cross section of the third capsule skin 13 can be arranged in a circular arc shape. For example, the cross section of the third capsule skin 13 is arranged in a semicircular shape.

[0059] In some embodiments, the tensioning assembly 2 is a single structural member, which can be arranged between the first capsule skin 11 and the second capsule skin 12 in an inclined or horizontal manner, so as to play a structural reinforcing effect and improve the supporting performance of the capsule skin assembly 1.

[0060] As Figure 4 In some embodiments, the tensioning assembly 2 includes a first tensioning member 21 and a second tensioning member 22. The first tensioning member 21 is connected between the first capsule skin 11 and the second capsule skin 12. The second tensioning member 22 is connected between the first capsule skin 11 and the second capsule skin 12. The first tensioning member 21 and the second tensioning member 22 are arranged in a cross manner.

[0061] It can be understood that, based on the supporting effect of the first tensioning member 21 and the second tensioning member 22 on the first capsule skin 11 and the second capsule skin 12, the radial deformation of the capsule skin assembly 1 can be effectively limited, and the deformation amount of the capsule skin assembly 1 can be reduced. After the air spring is used for a long time and is aged and / or deflated, the first tensioning member 21 and the second tensioning member 22 can effectively support the capsule skin assembly 1, reduce the influence degree of the rubber aging and deflation on the air spring, and improve the durability of the air spring.

[0062] In some embodiments, the first tensioning member 21 and the second tensioning member 22 can be arranged in a cross manner in the up-down direction. That is, the first tensioning member 21 and the second tensioning member 22 extend in the axial direction of the capsule skin assembly 1 and form a cross.

[0063] In some embodiments, the cross position of the first tensioning member 21 and the second tensioning member 22 can be located at the middle position of the interval region formed by the first capsule skin 11 and the second capsule skin 12. Alternatively, the cross position of the first tensioning member 21 and the second tensioning member 22 can be close to the first capsule skin 11. Alternatively, the cross position of the first tensioning member 21 and the second tensioning member 22 can be close to the second capsule skin 12. The first tensioning member 21 and the second tensioning member 22 are arranged in a cross manner, which can effectively improve the supporting effect of the capsule skin assembly 1. In the embodiments of the present application, the cross position of the first tensioning member 21 and the second tensioning member 22 is not limited.

[0064] In some embodiments, both the first tension member 21 and the second tension member 22 are inclined. For example, along the direction from the first skin 11 to the second skin 12, the first tension member 21 is inclined upwards, and the second tension member 22 is also inclined upwards. Alternatively, along the direction from the first skin 11 to the second skin 12, the first tension member 21 is inclined upwards, while the second tension member 22 is inclined downwards. Alternatively, along the direction from the first skin 11 to the second skin 12, the first tension member 21 is inclined downwards, while the second tension member 22 is inclined upwards. Alternatively, along the direction from the first skin 11 to the second skin 12, the first tension member 21 is inclined downwards, and the second tension member 22 is also inclined downwards.

[0065] In some embodiments, the first tension member 21, the second tension member 22, the first bladder 11, and the second bladder 12 are integrally formed.

[0066] In some embodiments, the first tension member 21, the second tension member 22, the first bladder 11, and the second bladder 12 have the same thickness. Alternatively, at least two of the first tension member 21, the second tension member 22, the first bladder 11, and the second bladder 12 have different thicknesses.

[0067] like Figure 4 As shown, in some embodiments, the included angle between the first tension member 21 and the second tension member 22 is α, which satisfies: 0°<α≤30°.

[0068] Understandably, the angle between the first tension member 21 and the second tension member 22 will affect the design complexity and the symmetry of the vertical stiffness performance of the air spring. An angle α greater than 0 degrees is chosen to ensure that the first tension member 21 and the second tension member 22 intersect. An angle α less than or equal to 30 degrees is chosen to prevent excessive design complexity and poor symmetry of the air spring's vertical stiffness performance.

[0069] In some embodiments, the included angle α between the first tension member 21 and the second tension member 22 can be set to 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, or any value between the two.

[0070] In some embodiments, at least two tensioning components 2 are provided. These at least two tensioning components 2 are spaced apart circumferentially along the skin assembly 1. And / or, at least two groups of tensioning components 2 are provided. Each group of tensioning components 2 includes at least two tensioning components 2. The tensioning components 2 within each group are spaced apart circumferentially along the skin assembly 1. At least two groups of tensioning components 2 are spaced apart axially along the skin assembly 1.

[0071] It is understandable that by setting at least two tensioning components 2 and / or at least two sets of tensioning components 2, the support performance of the bladder assembly 1 can be improved at multiple locations, thereby further enhancing the structural strength, stability, and durability of the air spring.

[0072] For example, at least two tensioning assemblies 2 are arranged along the circumference of the bladder skin assembly 1, and the at least two tensioning assemblies 2 are symmetrically distributed about the center. In this way, the bladder skin assembly 1 can be structurally reinforced at multiple positions along the circumference thereof, thereby improving the support performance of the bladder skin assembly 1. In some embodiments, 10-15 tensioning assemblies 2 are arranged along the circumference of the bladder skin assembly 1. Alternatively, more or fewer tensioning assemblies 2 can be arranged based on the design requirements and use requirements of the air spring.

[0073] For example, at least two tensioning assemblies 2 are arranged along the circumference of the bladder skin assembly 1, and the at least two tensioning assemblies 2 are symmetrically distributed about the center, thereby forming a group of tensioning assemblies 2. Multiple groups of tensioning assemblies 2 are arranged along the axial direction of the bladder skin assembly 1. In this way, the bladder skin assembly 1 can be structurally reinforced at multiple positions along the circumference and axial direction thereof, thereby improving the support performance of the bladder skin assembly 1. For example, 15 tensioning assemblies 2 are arranged along the circumference of the bladder skin assembly 1, and the tensioning assemblies 2 are arranged into three groups.

[0074] It can be understood that the more the number of tensioning assemblies 2 arranged and the smaller the spacing, the more significant the effect of increasing the stiffness of the air spring, and the support performance can be significantly improved. However, a larger number of tensioning assemblies 2 can increase the difficulty of manufacturing the air spring, and reduce the range of stiffness variation, thereby causing the vehicle to be unable to be adjusted to a comfortable height position. Therefore, the number and spacing of the tensioning assemblies 2 can be reasonably selected based on the design requirements.

[0075] In some embodiments, the number of tensioning assemblies 2 is determined by the design parameters of the air spring. The design parameters of the air spring include the material properties (e.g., cross-sectional strength, hardness, modulus, etc.) of the bladder skin assembly 1, the structure (e.g., thickness, internal cord distribution, etc.) of the bladder skin assembly 1, the internal cord material, the design size of the piston assembly 4, the design size of the bladder skin assembly 1, etc.

[0076] In some embodiments, the number and distribution of the tensioning assemblies 2 can be reasonably selected based on the design requirements. For example, the number of tensioning assemblies 2 along the circumference, the spacing between adjacent two tensioning assemblies 2 along the circumference, the number of tensioning assemblies 2 along the axial direction (i.e., the number of groups of tensioning assemblies 2), the spacing between adjacent two groups of tensioning assemblies 2, etc.

[0077] Please refer to Figure 2 and Figure 3 In some embodiments, the bladder skin structure further includes a support assembly 3. The support assembly 3 is connected between the first bladder skin 11 and the second bladder skin 12. The support assembly 3 is arranged along the axial direction of the bladder skin assembly 1 and is spaced apart from the tensioning assemblies 2.

[0078] It can be understood that the support assembly 3 can support the radial direction of the bladder skin assembly 1, so as to limit the radial deformation of the air spring. When the air spring is aged or deflated after long-term use, the support structure can limit the radial contraction of the second bladder skin 12, so as to resist the second bladder skin 12 and reduce the influence of the failure of the air spring due to aging or deflation.

[0079] In some embodiments, the support assembly 3 is made of a metal material, so as to have a rigid support effect. The support assembly 3 can be provided in a circular ring shape. The outer ring of the support assembly 3 is in abutment with the second bladder skin 12, and the inner ring of the support assembly 3 is in abutment with the first bladder skin 11. The outer surface of the second bladder skin 12 can be connected with an aluminum bushing structure, and the support assembly 3 corresponds to the aluminum bushing structure, so that the support assembly 3 can be sleeved in the aluminum bushing, and the second bladder skin 12 is fixed between the support assembly 3 and the aluminum bushing.

[0080] In some embodiments, the support assembly 3 can be a hollow structure, and the inner ring and the outer ring thereof can be spaced apart and connected by a connecting piece. In this way, the weight of the support assembly 3 can be reduced, and the consumption of the support assembly 3 can be reduced. The connecting piece can be provided in a plurality of forms and spaced apart in the axial direction and / or the circumferential direction. Further, the connecting piece can include two intersecting connecting columns, so as to further improve the support effect of the support assembly 3.

[0081] As shown in Figures 1 to 3 According to the second aspect of the present application, an air spring is provided, which includes the above-mentioned bladder skin structure. The air spring has all the beneficial effects of the above-mentioned bladder skin structure, and the present application will not be repeated here.

[0082] The air spring further includes a piston assembly 4 and a fixed seat 5. The piston assembly 4 is in sealing connection with the first bladder skin 11. The fixed seat 5 is in sealing connection with the second bladder skin 12. The bladder skin structure, the piston assembly 4 and the fixed seat 5 enclose a closed cavity.

[0083] It can be understood that the fixed seat 5 can be used to connect a lower support of a suspension system, so as to fix the air spring to the suspension system.

[0084] The bladder skin structure, the piston assembly 4 and the fixed seat 5 can be filled with air to change the volume or pressure of the cavity, and the air spring can have different stiffnesses by using the extensibility of the gas.

[0085] Please continue to refer to Figure 2 and Figure 3In some embodiments, the first bladder skin 11 is configured with a first clamping structure 111, and the piston assembly 4 is configured with a second clamping structure 41 clamped with the first clamping structure 111. One of the first clamping structure 111 and the second clamping structure 41 is a buckle, and the other is a clamping groove. The buckle is clamped in the clamping groove.

[0086] It can be understood that, based on the clamping of the first clamping structure 111 and the second clamping structure 41, the connection of the first bladder skin 11 and the piston assembly 4 can be achieved, so as to install the piston assembly 4 on the bladder skin assembly 1. The first clamping structure 111 and the second clamping structure 41 can form an interference fit, so that the piston assembly 4 and the first bladder skin 11 have good air tightness after the first clamping structure 111 and the second clamping structure 41 are connected. Alternatively, a sealing filler layer can also be arranged in the second clamping structure 41, and the sealing filler layer is used to fill the gap between the first clamping structure 111 and the second clamping structure 41, so as to ensure that the piston assembly 4 and the first bladder skin 11 have good air tightness.

[0087] The first clamping structure 111 is arranged as a ring-shaped buckle, and the second clamping structure 41 is arranged as a ring-shaped clamping groove. Based on the mutual cooperation between the buckle and the clamping groove, the assembly of the piston assembly 4 and the bladder skin assembly 1 is very convenient, the assembly process is simplified, and the assembly cost is reduced under the condition of meeting the air tightness requirement.

[0088] For example, the first bladder skin 11 is configured with a buckle on the side facing the piston assembly 4, the piston assembly 4 is configured with a clamping groove on the side facing the first bladder skin 11, and the buckle is clamped in the clamping groove. In this way, the connection between the piston assembly 4 and the first bladder skin 11 is achieved.

[0089] For example, the first bladder skin 11 is configured with a buckle on the side facing the piston assembly 4, the piston assembly 4 is configured with a clamping groove on the side facing the first bladder skin 11, and the buckle is clamped in the clamping groove. In this way, the connection between the piston assembly 4 and the first bladder skin 11 is achieved.

[0090] Please continue to refer to Figure 2 and Figure 3 In some embodiments, the first bladder skin 11 has a constraint portion 112 located in the cavity. The constraint portion 112 is connected with the first clamping structure 111. The tensioning assembly 2 is connected between the constraint portion 112 and the second bladder skin 12.

[0091] It can be understood that, based on the connection of the tension assembly 2 between the constraint part 112 and the second bladder skin 12, when the air spring is subjected to a larger impact, the constraint part 112 can play a role in buffering the rebound. For example, when the air spring vibrates due to the large fluctuation of the internal pressure of the cavity during use, the constraint part 112 cooperates with the tension assembly 2 to effectively buffer the vibration, prevent the air spring from being unstable due to the real violent, and improve the stability of the air spring. When it is applied to the suspension system of the vehicle, it can provide a more comfortable driving experience for the driver.

[0092] In some embodiments, the thickness of the constraint part 112 can be slightly greater than the thickness of the first bladder skin 11 and the second bladder skin 12. Alternatively, the thickness of the constraint part 112 is the same as the thickness of the first bladder skin 11 and the second bladder skin 12.

[0093] In some embodiments, the second bladder skin 12 is configured with a connecting part 121 extending towards the fixed seat 5. The connecting part 121 is sealingly connected with the fixed seat 5.

[0094] It can be understood that, based on the sealing connection of the connecting part 121 and the fixed seat 5, the air-tight seal between the second bladder skin 12 and the fixed seat 5 is achieved. Thus, the piston assembly 4, the bladder skin assembly 1 and the fixed seat 5 can be enclosed to form a closed cavity.

[0095] The connecting part 121 is integrally formed with the second bladder skin 12.

[0096] As shown in Figure 2 In some embodiments, the connecting part 121 is sealingly connected with the fixed seat 5 through the first fastener 61.

[0097] It can be understood that, in order to achieve the connection of the first fastener 61 with the fixed seat 5 and the connecting part 121, the fixed seat 5 can be configured with a first connecting hole, and the connecting part 121 can be configured with a second connecting hole, and the first fastener 61 is sequentially arranged in the first connecting hole and the second connecting hole to achieve reliable connection of the connecting part 121 and the fixed seat 5.

[0098] In some embodiments, the first fastener 61 can be provided as a screw, and the first connecting hole and the second connecting hole are correspondingly provided as threaded holes.

[0099] In some embodiments, a sealing gasket can be sleeved on the first fastener 61, or a sealing filler layer can be provided between the connecting part 121 and the fixed seat 5 to further improve the air-tight seal between the connecting part 121 and the fixed seat 5.

[0100] As shown in Figure 3 and Figure 5As shown, in some embodiments, the fixing seat 5 comprises a first seat body 51, a second seat body 52 and a sealing ring 53. The first seat body 51 is formed with a connecting area 511. The second seat body 52 is connected with the first seat body 51. The second seat body 52 has a bending portion 521 extending towards the connecting area 511. The sealing ring 53 is arranged at the connecting area 511. The sealing ring 53 is arranged in a spaced manner with the bending portion 521. The connecting portion 121 is abutted between the sealing ring 53 and the bending portion 521. The first seat body 51 is connected with the bending portion 521 through a second fastener 62.

[0101] It can be understood that, under the locking action of the second fastener 62, the first seat body 51 and the second seat body 52 can form a stable connection, and the second seat body 52 can be tightly attached to the first seat body 51. Under the fastening action, the second seat body 52 can reliably abut the connecting portion 121 between the sealing ring 53 and the bending portion 521, thereby locking the connecting portion 121 and realizing the sealed connection between the connecting portion 121 and the fixing seat 5.

[0102] The spacing between the bending portion 521 and the sealing ring 53 can be less than the thickness of the connecting portion 121. When the connecting portion 121 is abutted between the bending portion 521 and the sealing ring 53, the bending portion 521 and the sealing ring 53 can press the connecting portion 121, which not only realizes reliable connection, but also realizes air tightness.

[0103] In some embodiments, the first seat body 51, the second seat body 52 and the sealing ring 53 are all made of metal.

[0104] In some embodiments, the first seat body 51 comprises a main body portion, a first extension portion, a second extension portion and a third extension portion connected in sequence. The first extension portion extends away from the second seat body 52, and the first extension portion and the main body portion can be connected at an obtuse angle. The second extension portion is connected with the first extension portion at an obtuse angle, and the second extension portion is arranged in parallel with the main body portion. The third extension portion has a protruding structure protruding outwardly towards the bladder skin assembly 1. In this way, the connecting area 511 can be enclosed by the first extension portion, the second extension portion and the third extension portion.

[0105] The main body portion can be circular, and the first extension portion, the second extension portion and the third extension portion are all arranged in a ring structure, based on the air spring being a substantially cylindrical structure.

[0106] In some embodiments, the bending portion 521 is integrally formed with the second seat body 52. The bending portion 521 is bent in the connecting area 511, and the bending portion 521 is attached to the second extension portion of the first seat body 51.

[0107] In some embodiments, the second extension of the first seat body 51 and the bent portion 521 of the second seat body 52 are connected by the second fastener 62. A third connecting hole can be formed on the second extension, and a fourth connecting hole can be formed on the bent portion 521. The second fastener 62 is sequentially arranged in the third connecting hole and the fourth connecting hole to fix the first seat body 51 and the second seat body 52. For example, the second fastener 62 can be a bolt, and the third connecting hole and the fourth connecting hole are both threaded holes.

[0108] In some embodiments, a sealing washer can be sleeved on the second fastener 62. Alternatively, a sealing filler layer can be arranged in the connecting area 511. Alternatively, a sealing filler layer can be arranged between the second extension and the bent portion 521. In this way, the air tightness of the connection between the fixed seat 5 and the bladder assembly 1 can be further improved.

[0109] In some embodiments, the first seat body 51 can be fixedly connected to the lower support of the suspension system by a bolt.

[0110] The air spring in the embodiments of the present application not only can reduce the air tightness requirement, but also has the advantages of simple structure and convenient assembly, and can effectively reduce the production cost of the air spring.

[0111] According to a third aspect of the present application, a suspension system is provided, which includes the air spring described above, and has all the beneficial effects of the air spring described above, which will not be repeated here.

[0112] According to a fourth aspect of the present application, a vehicle is provided, which includes the suspension system described above, and has all the beneficial effects of the suspension system described above, which will not be repeated here.

[0113] The vehicle can be a fuel automobile, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., which will not be specifically limited herein.

[0114] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0115] In the above embodiments, the description of each embodiment is focused on, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0116] The embodiments, implementation manners and related technical features of the present application can be combined or replaced with each other without conflict.

[0117] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application in any form. Any simple modification, equivalent change and modification made to the above embodiments without departing from the technical solution of the present application and in accordance with the technical essence of the present application shall still fall within the scope of the technical solution of the present application.

Claims

1. A bladder skin structure, characterized by, The application relates to a bladder skin structure, comprising: a bladder skin assembly having a first bladder skin, a second bladder skin sleeved on the periphery of the first bladder skin, and a third bladder skin connected between the first bladder skin and the second bladder skin for enclosing the closed bladder skin assembly; a tension assembly connected between the first bladder skin and the second bladder skin; wherein the tension assembly comprises: a first tension member connected between the first bladder skin and the second bladder skin; a second tension member connected between the first bladder skin and the second bladder skin and arranged crosswise to the first tension member.

2. The bladder skin structure of claim 1, wherein, An included angle between the first tension member and the second tension member is alpha, and 0°<alpha<=30° is satisfied.

3. The capsule skin structure of any one of claims 1-2, wherein, The tension assembly is arranged as at least two, and the at least two tension assemblies are arranged spaced apart along the circumference of the bladder skin assembly; and / or The tension assembly is arranged as at least two groups, each group of the tension assembly comprises at least two tension assemblies, the tension assemblies in each group are arranged spaced apart along the circumference of the bladder skin assembly, and the at least two groups of the tension assemblies are arranged spaced apart along the axis of the bladder skin assembly.

4. The capsule skin structure of any one of claims 1-2, wherein, The bladder skin structure further comprises: a support assembly connected between the first bladder skin and the second bladder skin and arranged spaced apart from the tension assembly along the axis of the bladder skin assembly.

5. An air spring characterized by, The application relates to a suspension system, comprising: the bladder skin structure according to any one of claims 1-4; a piston assembly sealingly connected to the first bladder skin; a fixed seat sealingly connected to the second bladder skin; wherein the bladder skin structure, the piston assembly and the fixed seat enclose a sealed cavity.

6. The air spring of claim 5, wherein, The first bladder skin is provided with a first clamping structure, the piston assembly is provided with a second clamping structure clamped with the first clamping structure, and one of the first clamping structure and the second clamping structure is a buckle and the other is a clamping groove.

7. The air spring of claim 6, wherein, The first bladder skin has a constraint part located in the cavity, and the constraint part is connected with the first clamping structure, wherein the tension assembly is connected between the constraint part and the second bladder skin.

8. The air spring of claim 5, wherein, The second bladder skin is provided with a connecting part extending towards the fixed seat, and the connecting part is sealingly connected with the fixed seat.

9. The air spring of claim 8, wherein, The connecting part is sealingly connected with the fixed seat through a first fastener.

10. The air spring of claim 8, wherein, The fixed seat comprises: a first seat body formed with a connecting area; a second seat body connected with the first seat body, and the second seat body has a bent part extending towards the connecting area; a sealing ring arranged in the connecting area and arranged spaced apart from the bent part; wherein the connecting part is abutted between the sealing ring and the bent part, and the first seat body is connected with the bent part through a second fastener.

11. A suspension system characterized by, The application relates to an air spring, comprising:

12. A vehicle characterized by comprising: the bladder skin structure according to any one of claims 5-10. The application relates to a suspension system, comprising: the suspension system according to claim 11.

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