AU2021101360A4

AU2021101360A4 - Air Spring Having Elastic Reinforcing Member, Method of Assembling the Same and Vehicle Suspension Device

Info

Publication number: AU2021101360A4
Application number: AU2021101360A
Authority: AU
Inventors: Junjie Chen; Ke Chen; Sheng Chen; Yingkui GU; Kaiqi Huang; Ziqi HUANG; Ganwei Liu
Original assignee: Jiangxi University of Science and Technology
Current assignee: Jiangxi University of Science and Technology
Priority date: 2020-03-17
Filing date: 2021-03-16
Publication date: 2021-05-13
Anticipated expiration: 2029-03-16
Also published as: CN111306232B; CN111306232A

Abstract

The present disclosure provides an air spring having an elastic reinforcing member. The air spring includes a bellow and an elastic reinforcement member. A closed bellow space used for storing compressed gas is formed inside the bellow; a wall-body of the bellow is integrally vulcanized from an inner rubber layer, a first cord fabric layer, a second cord fabric layer and an outer rubber layer from inside to outside, cord threads of the first cord fabric layer and cord threads of the second cord fabric layer are tilted away from each other; the elastic reinforcement member is disposed in the bellow space and an extension and compression direction of the elastic reinforcement member is the same as that of the bellow. The present disclosure further provides a method of assembling the air spring, and a vehicle suspension device. {ZZWANZP-21001-AU U M/01311727v1} 18 100 70 extension 153 153A 10 152 \/ compression 162 140 160 117V 110 extension 180 119 FIG. 1 {ZZWANZP-21001-AU U M/01311727v1} 19

Description

70

extension 153 153A

10 152

\/

compression 162 140

160

117V

110 extension

180 119

FIG. 1

{ZZWANZP-21001-AU U M/01311727v1} 19

AIR SPRING HAVING ELASTIC REINFORCING MEMBER, METHOD OF ASSEMBLING THE SAME AND VEHICLE SUSPENSION DEVICE TECHNICAL FILED

The present disclosure relates to a technical field of springs, and particularly, to an air spring having an elastic reinforcing member and method of assembling the same and vehicle suspension device.

BACKGROUND

In vibration absorption system, it is often necessary to apply elastic elements to achieve function of vibration absorption. As the development tendency towards structure refinement and compactness of many mechanical equipment becomes more and more apparent, especially in some circumstances where working space is severely limited, how to ensure a bearing capacity of the elastic element has become an important inevitable subject when designing elastic element. However, current elastic element still cannot solve the aforementioned problem.

SUMMARY

It is an object of the present disclosure to solve the above mentioned problems at least and advantages of the present disclosure will be readily apparent upon reading the following detailed description.

Inventors of the present disclosure have found that it is difficult to design suitable elastic elements to absorb vibrations in some circumstances where bearing capacity is large, or space is compact, such as some Sport Utility Vehicles, in which a large rear row space is expected when designing, or partially retrofitted small and medium-sized recreational vehicle.

According to conventional solutions, if a conventional air spring is applied, there will be at least one serious problem that the air spring occupies a large volume and it is not convenient to arrange the air spring under circumstances where working space is

{ZZWANZP-21001-AU U M/01311727v1} 1 limited. The vibration absorption effect will be reduced if metal elastic elements, such as a steel leaf spring or a coil spring with a large diameter, are used, which would further result in reduced comfort degree of vehicle. In addition, metal spring has a large unsprung mass due to its large mass, therefore maneuverability of the vehicle will be correspondinglyreduced.

Therefore, it is a difficult technical problem to solve that designing an elastic element which can meet requirements of large bearing capacity, well compactness in structure and small space occupancy.

In order to solve the above mentioned technical problem, inventors of the present disclosure put forward a new air spring after carefully designing and verifying based on characteristics of various kinds of elastic elements. That is, based on a bellow, an elastic reinforcing member is introduced, and the elastic reinforcing member is disposed within the bellow and integrated with the bellow without changing overall volume of the bellow. Various aspects have been taken into consideration on specific elastic reinforcing member designing by inventors during further optimization, such as the bearing capacity of the elastic reinforcement member, how to design an elastic reinforcement member to maximally compress a space occupancy thereof in order to avoid its excessive occupation of the inner space of the bellow and affecting the elasticity of the bellow.

Based on the above inventive concept, the present disclosure provides an air spring having an elastic reinforcing member and method of assembling the same, and a vehicle suspension device. The air spring of the present disclosure has advantages in bearing capacity, in compactness of structure and in small volume, and it can break through the limitation of limited working space.

The present disclosure is realized by the following technical solutions.

First aspect of the present disclosure

An air spring having an elastic reinforcing member is provided according to the first aspect of the present disclosure, the air spring includes:

a bellow, wherein a closed bellow space used for storing compressed gas is formed inside the bellow; a wall-body of the bellow is integrally vulcanized from an inner rubber layer, a first cord fabric layer, a second cord fabric layer and an outer rubber layer from inside to outside, cord threads of the first cord fabric layer and cord {ZZWANZP-21001-AU U M/01311727v1} 2 threads of the second cord fabric layer are tilted away from each other; and an elastic reinforcement member disposed in the bellow space, wherein an extension and compression direction of the elastic reinforcement member is the same as that of the bellow.

In some embodiments, the air spring further includes at least one hoop-ring, the hoop-ring divides the bellow space into multiple air chambers along the extension and compression direction of the bellow, the multiple air chambers are communicated with each other.

In some embodiments, the air chamber is configured to have a cylindrical shape.

In some embodiments, the hoop-ring is embedded within the wall-body of the bellow so as to form an integrated structure.

In some embodiments, the elastic reinforcement member includes a coil spring.

In some embodiments, the air spring further includes a first sealing member and a second sealing member, the first sealing member and the second member are used to respectively sealing two openings disposed at two ends of the bellow along the extension and compression direction of the bellow; the first sealing member includes a first sealing block and a first pressing ring, the second sealing member includes a second sealing block and a second pressing ring, a first antiskid groove is disposed at a joint of the first sealing block and an inner wall of the bellow, a second antiskid groove is disposed at a joint of the second sealing block and the inner wall of the bellow; the first sealing block and the second sealing block respectively extend into the corresponding openings, the first sealing block and the second sealing block abut against the inner wall of the bellow, the first pressing ring and the second pressing ring are respectively sleeved on an outer wall of the bellow at a position corresponding to the first antiskid groove and the second antiskid groove, whereby the bellow is respectively pressed into the first antiskid groove and the second antiskid groove.

In some embodiments, a first rubber pad and a second rubber pad are disposed at two ends of the elastic reinforcing member along the extension and compression direction of the elastic reinforcing member; the first rubber pad is disposed between the first sealing block and one end of the elastic reinforcing member, the second {ZZWANZP-21001-AU U M/01311727v1} 3 rubber pad is disposed between the second sealing block and the other end of the elastic reinforcing member.

In some embodiments, an accommodation cavity is formed on the first sealing block and extends toward the elastic reinforcement member, one end of the elastic reinforcement member is installed in the accommodation cavity, a bump is formed on the second sealing block and extends toward the elastic reinforcement member, the bump extends into a connection hole disposed at the other end of the elastic reinforcement member.

Second aspect of the present disclosure

A method of assembling the air spring of aforementioned is provided according to the second aspect of the present disclosure, the method includes steps of:

pressing a first opening of the bellow into the first antiskid groove of the first sealing block by the first pressing ring, whereby the inner wall of the first opening of the bellow is inserted into the first antiskid groove; then sequentially installing the first rubber pad, the elastic reinforcing member, the second rubber pad and the second sealing block onto the first sealing block; and

pressing a second opening of the bellow into the second antiskid groove of the second sealing block by the second pressing ring, whereby the inner wall of the second opening of the bellow is inserted into the second antiskid groove.

Third aspect of the present disclosure

A vehicle suspension device is provided according to the third aspect of the present disclosure, the vehicle suspension device includes:

the air spring aforementioned, and an axle connected to wheels and a lower suspension arm connected to wheels;

wherein a first threaded hole configured to connect with the lower suspension arm is disposed on one end of the air spring, a second threaded hole configured to connect with a frameless body or a vehicle frame is disposed on the other end of the air spring.

{ZZWANZP-21001-AUUM/01311727v1} 4

Embodiments of the present disclosure may at least have following advantages.

In some embodiments, the air spring of the present disclosure has a large bearing capacity and a compactness in structure of the air spring can be assured at the same time, which makes the air spring very suitable for being applied to occasions that the bearing capacity is large, structure is compact and working space is limited.

In some embodiments, the vehicle suspension device of the present disclosure improves comfort degree of the vehicle.

Additional advantages, objects, and characteristic of the present disclosure will be set forth in following description and be understood by those skilled in the art through researching and practicing the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural schematic view of an air spring having an elastic reinforcement member according to some embodiments of the present disclosure;

FIG. 2 is another structural schematic view of an air spring with an elastic reinforcement member according to some embodiments of the present disclosure;

FIG.3 is a structural schematic view of a bellow according to some embodiments of the present disclosure;

FIG. 4 is an internal structure schematic view of a wall-body of a bellow according to some embodiments of the present disclosure;

FIG.5 is an arranged schematic view of arrangement of cord threads on a first cord fabric layer and cord threads of a second cord fabric layer of wall-body of a bellow according to some embodiments of the present disclosure;

FIG. 6 is an internal structure schematic view of an air spring having an elastic reinforcement member according to some embodiments of the present disclosure;

FIG. 7 is another internal structure schematic view of an air spring having an elastic reinforcement member according to some embodiments of the present disclosure; {ZZWANZP-21001-AUUM/01311727v1} 5

FIG. 8 is an enlarged schematic view of portion N of FIG. 7; and

FIG. 9 is a structural schematic view of a vehicle suspension device according to some embodiments of the present disclosure

Reference Numerals:

air spring 100 having an elastic reinforcing member, bellow 110, bellow space 111, first air chamber 1lla, second air chamber Il1b, wall-body 112, inner rubber layer 113, first ply cord 114, second ply cord 115, outer rubber layer 116, hoop-ring 117, first Opening 118, second Opening 119, elastic reinforcing member 120, connection hole 121, position limiting hole 122, first rubber pad 130, second rubber pad 140, first sealing block 150, air inlet hole 151, accommodation cavity 152, positioning pin 153, first threaded hole 154, first antiskid groove 155, second sealing block 160, bump 161, position limiting block 162, second antiskid groove 163,second threaded hole 164, first pressing ring170, second pressing ring180,wheel 200, axle 300, lower suspension arm 400, pull rod 500, connecting plate 600, vehicle suspension device 700.

DETAILED DESCRIPTION

The present disclosure will be described in further detail by referencing to the accompanying drawings, such that those skilled in the art can practice it depending on the description of the present disclosure.

It should be noted that in description of the present disclosure, the orientation or positional relationship indicated by the terms, such as " transverse", "longitudinal", " upper ", " lower ", " front'", " rear ", "f left ", " right ", " vertical'", " horizontal ", top ", " bottom ", " inner"," out " ,etc., is based on the orientation or positional relationship shown in the accompanying drawings, the terms is not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, it is just only for simply describing the present disclosure, therefore, that should not be construed as limitation for the present disclosure.

FIRST EXAMPLE

{ZZWANZP-21001-AUUM/01311727v1} 6

Referring to FIG. 1 to FIG. 8, an air spring having an elastic reinforcing member is provided according to the first example, please referring to FIG. 1 to FIG. 5, the air spring includes:

a bellow 110, a closed bellow space 111 used for storing compressed gas is formed inside the bellow 110; a wall-body 112 of the bellow 110 is integrally vulcanized from an inner rubber layer 113, a first cord fabric layer 114, a second cord fabric layer 115 and the outer rubber layer 116 from inside to outside, cord threads of the first cord fabric layer 114 and cord threads of the second cord fabric layer 115 are tilted away from each other; and

an elastic reinforcement member 120 disposed in the bellow space 111, and an extension and compression direction of the elastic reinforcement member 120 is the same as that of the bellow 110.

In this embodiment, working principle of the bellow 110 is: compressed gas is introduced into the bellow space 111, so that the bellow 110 becomes an elastic member, and an elastic function of the bellow 110 can be realized by squeezing the bellow 110 during working process. The bellow-type air spring 110 has an outstanding buffering performance and excellent vibration absorption effect.

Referring to FIG. 3 and FIG 4, in addition to the inner rubber layer 113 and the outer rubber layer 116, the wall-body 112 of the bellow also includes the first cord fabric layer 114 and the second cord fabric layer 115, and the wall-body 112 is integrally vulcanized from materials mentioned above, thereby toughness, bearing capacity and service life of the bellow 110 are improved. In addition, the bellow 110 forms an integrated structure after being vulcanized, so that the bellow 110 can be conveniently replaced independently, a production efficiency of the bellow 110 is improved, and production cost of a mold of the bellow 110 and maintenance cost of the bellow 110 during usage period are reduced.

In some embodiments, the inner rubber layer 113 and the outer rubber layer 116 are made of neoprene. In some other embodiments, they are made from other elastomeric materials, such as silica gel, mixed rubber that containing natural rubber and neoprene, etc.

Further, referring to FIG. 5, cord threads of the first cord fabric layer 114 and {ZZWANZP-21001-AU U M/01311727v1} 7 cord threads of the second cord fabric layer 115 are tilted away from each other, that is cord threads of the first cord fabric layer 114 and cord threads of the second cord fabric layer 115 are not parallel to each other. This arrangement of the first cord fabric layer 114 and the second cord fabric layer 115 can reduce an expanded outer diameter of the bellow 110 and increase burst pressure, thereby increasing a working pressure, bearing capacity and safety performance of the air spring 100.

In some embodiments, a cord fabric rubber is disposed between the first cord fabric layer 114 and the second cord fabric layer 115, the cord fabric rubber is a mixed rubber containing natural rubber and neoprene.

Further, an elastic reinforcement member 120 is disposed inside the air spring 100 in this example, so that an overall bearing load of the air spring 100 is jointly shared by the elastic reinforcement member 120 and the bellow 110, thereby reducing bearing load of the bellow 110 and improving the service life of the bellow 110.

Due to the introduction of the elastic reinforcement 120, the load-bearing capacity of the air spring 100 as a whole is greatly improved. According to the air spring 100 of this example, the elastic reinforcement member 120 is arranged within the bellow 110, so that the bearing capacity of the air spring is greatly improved without increasing overall volume of the air spring; it is for this reason that the air spring 100 of the present example is very suitable for applications where the bearing capacity is large, structure is compact, and working space is limited.

Further, it should be noted that the elastic reinforcement member 120 may be composed of any elastic objects. In this example, the elastic reinforcement member 120 is a coil spring which has a strong bearing capacity, then the bearing capacity of the air spring can be improved in general. In addition, the coil spring occupies a small space due to its small volume, so that the influence brought by the coil spring on storage amount of compressed gas in the bellow space 111 is almost negligible, and it is also beneficial to setting its bearing capacity and rigidity by changing the diameter or pitch of spring wire.

In some other embodiments, elastic reinforcement member 120 is a colloidal substance, such as a rubber member which has a certain elastic supporting and telescoping capability, etc.

{ZZWANZP-21001-AU U M/01311727v1} 8

In the present example, the air spring 100 includes at least one hoop-ring 117, the hoop-ring 117 divides the bellow space 111 into multiple air chambers along the extension and compression direction of the bellow 110, the multiple air chambers are communicated with each other.

In one embodiment, the air spring 100 includes one hoop-ring 117, in some other embodiments, the air spring 100 includes multiple hoop-rings 117. The bellow 110 is divided into two curved bladders by the hooping-ring 117 sleeved on the bellow 110 along its extension and compression direction, the bellow space 111 in the bellow 110 is divided into two air chambers communicated with each other, namely a first air chamber 111a and a second air chamber I1b. Expansion of the middle portion of the bellow 110 is limited by the hooping-ring 117, so that external force acting on the whole bellow 110 is reduced, thereby improving service life of the bellow 110.

In one embodiment, the air chamber is configured to have a cylindrical shape. In comparison with the air chambers having an arc shape or other shapes, the air chambers having cylindrical shape increases an internal volume of the air spring, which is beneficial to reducing the rigidity of the air spring and improving vibration absorption capacity.

In some embodiments, the hoop-ring 117 is embedded within the wall-body 112 of the bellow 110 so as to form an integrated structure.

Please referring to FIG. 6 and FIG. 7 on the basis of FIG. 1, in some embodiments, the air spring 100 includes a first sealing member and a second sealing member, the first sealing member and the second member are used to respectively sealing two openings disposed at two ends of the bellow 110 along the extension and compression direction of the bellow 110.

The first sealing member includes a first sealing block 150 and a first pressing ring 170, the second sealing member includes a second sealing block 160 and a second pressing ring 180, a first antiskid groove 155 is disposed at a joint of the first sealing block 150 and an inner wall of the bellow 110, and a second antiskid groove 163 is disposed at a joint of the second sealing block 160 and the inner wall of the bellow 110.

The first sealing block 150 and the second sealing block 160 respectively extend {ZZWANZP-21001-AU U M/01311727v1} 9 into the corresponding openings, the first sealing block 150 and the second sealing block 160 abut against the inner wall of the bellow 110, the first pressing ring 170 and the second pressing ring 180 are respectively sleeved on an outer wall of the bellow 110 at a position corresponding to the first antiskid groove 155 and the second antiskid groove 163, so that the bellow 110 is respectively pressed into the first antiskid groove 155 and the second antiskid groove 163.

In the present example, the two openings specifically refer to a first opening 118 and a second opening 119.

One purpose of setting the first sealing block 150 and the second sealing block 160 is to facilitate connection of the air spring and external equipment, another one is to provide a detachable air spring which is beneficial to disassembling, installing, performing maintenance or cleaning, etc. The first sealing block 150 and the second sealing block 160 can be made of metal or plastic materials, such as iron, aluminum or nylon.

In addition, in order to introduce compressed gas into the bellow space 111, an air inlet hole 151, in which a valve (not shown) is provided, is disposed on the first sealing block 150.

The purpose of the first pressing ring 170 and the second pressing ring 180 is to fixed seal the first sealing block 150 and the second sealing block 160 on the bellow 110. In the sealing measure, the wall-body 112 of the bellow 110 is buckled into the antiskid groove by the first pressing ring 170 and the second pressing ring 180; the process of buckling is simple and mature, the pressing rings is easy to disassemble and install, which can not only ensure a good tightness of the bellow 110, but also is beneficial to replacing the bellow 110.

More specifically, the first pressing ring 170 and the second pressing ring 180 are made of steel materials, the first pressing ring 170 and the second pressing ring 180 are circular ring which matches shape of the bellow 110; surface of the pressing ring is subjected to trivalent chromium electroplating treatment. The pressing rings of the embodiment may have following excellent performances at least: the manufacturing cost of the pressing rings is reduced due to simple structure designing, the corrosion resistance of the pressing rings is improved by trivalent chromium electroplating

{ZZWANZP-21001-AU U M/01311727v1} 10 treatment, and it is environment-friendly.

Further, the first antiskid groove 155 is disposed at the joint of the first sealing block 150 and the inner wall of the bellow 110, the second antiskid groove 163 is disposed at the joint of the second sealing block 160 and the inner wall of the bellow 110, so that the bellow 110 is pressed into the first antiskid groove 155 and the second antiskid groove 163, respectively. Then, airtightness of the bellow 110 after being connected with the first sealing block 150 and the second sealing block 160 can be improved.

Further, in some embodiments, multiple first antiskid grooves and multiple second antiskid grooves are disposed. FIG. 8 shows a specific structure of the second antiskid groove 163, the depth d of the second antiskid groove 163 is a half of the height h. In the present embodiment, the second antiskid groove 163 has a semi-cylindrical shape, that is, a cross section of the second antiskid groove 163 is semi-circular, and as shown in FIG. 8, r is the radius of the semi-cylindrical shape, h = 2d = 2r. According to the scheme, the cost of processing is reduced, and meanwhile, the airtightness of buckling is guaranteed.

As for the structure of the first anti-slip groove 155, it can be designed the same as the second antiskid groove 163, since it is similar to the second antiskid groove163.

Next, it should be noted that, in one embodiment, the elastic reinforcing member 120 is disposed between the first sealing block 150 and the second sealing block 160 along the extension and compression direction of the elastic reinforcing member 120, and the elastic reinforcing member 120 abuts against the first sealing block 150 and the second sealing block 160, respectively.

Further, in the present embodiment, a first rubber pad 130 and a second rubber pad 140 are disposed at two ends of the elastic reinforcement member 120 along the extension and compression direction of the elastic reinforcing member 120, respectively.

Specifically, the first rubber pad 130 is disposed between the first sealing block 150 and one end of the elastic reinforcement member 120, and the second rubber pad 140 is disposed between the second sealing block 160 and the other end of the elastic reinforcement member 120, so that a buffering effect can be provided between the {ZZWANZP-21001-AU U M/01311727v1} 11 elastic reinforcement member 120 and the first sealing block 150 and the second sealing block 160, the first rubber pad 130 and the second rubber pad 140 can serve as a buffering medium, particularly when the elastic reinforcement member 120 is a metal spring; abnormal sound generated due to friction between the elastic reinforcement member 120 and the first sealing block 150 and the second sealing block 160 can be avoided, and meanwhile, the elastic reinforcement member 120, the first sealing block 150 and the second sealing block 160 can be protected.

As shown in FIG. 6, further, in the present embodiment, an accommodation cavity 152 is formed on the first sealing block 150 and extends toward the elastic reinforcement member 120, one end of the elastic reinforcement member 120 is installed in the accommodation cavity 152, a bump 161 is formed on the second sealing block 160 and extends toward the elastic reinforcement member 120, the bump 161 extends into a connection hole 121 disposed at the other end of the elastic reinforcement member 120.

When assembling the air spring, the first rubber pad 130 is installed in the accommodating cavity 152, the second rubber pad 140 is sleeved on the bump 161, abuts against the second sealing block 160 (correspondingly, a through hole that matches the size of the bump 161 is provided on the second rubber pad 140, and the second rubber pad 140 is sleeved on the bump 161 through the through hole, the through hole is not shown in these figures), then, one end of the elastic reinforcement member 120 is inserted into the accommodating cavity 152 and abuts against the first rubber pad 130, the connecting hole 121 of the other end of the elastic reinforcement member 120 is sleeved on the bump 161 and abuts against the second rubber pad. The aforementioned structural designed may make the air spring more compact in structure and more stable in the present embodiment.

Further, a position limiting block 162 is disposed on the bump 161, a position limiting hole 122 which matches the position limiting block 162 is disposed on the elastic reinforcement member 122, the position limiting block 162 can be stuck in the position limiting hole 122 when the bump 161 is inserted into connecting hole 121, the stability of the connection between the second sealing block 160 and the elastic reinforcement member 120 is further improved.

{ZZWANZP-21001-AUUM/01311727v1} 12

It should be noted that the position limiting block 162 and bump 161 may be flexibly connected, fixedly connected, or even integrally formed.

SECOND EXAMPLE

A method of assembling an air spring 100 is provided in the second example, the air spring 100 is described in the first example, the method includes steps of:

S1, pressing one opening (namely the first opening 118 mentioned above) of the bellow into the first antiskid groove 155 of the first sealing block 150 by the first pressing ring 170, so that the inner wall of the first opening 118 of the bellow 110 is inserted into the first antiskid groove 155; then sequentially installing the first rubber pad 130, the elastic reinforcing member 120, the second rubber pad 140 and the second sealing block 160 onto the first sealing block 150; and

S2, pressing the other opening (namely the second opening 119) of the bellow 110 into the second antiskid groove 163 of the second sealing block 160 by the second pressing ring 180, so that the inner wall of the second opening 119 of the bellow 110 is inserted into the second antiskid groove 163.

In some embodiments, the second pressing ring 180 can be assembled firstly, then other elements are assembled in sequence until the first pressing ring 170 is assembled, then assembling of the air spring 100 is completed.

THIRD EXAMPLE

Referring to FIG. 9, a vehicle suspension device 1000 is provided in the third example, the vehicle suspension 1000 includes:

the air spring 100 of the first example, an axle 300 connected to wheels and a lower suspension arm 400 connected to wheels.

A first threaded hole 153 configured to connect with the lower suspension arm is disposed on one end of the air spring, a second threaded hole 164 configured to connect with a bearing type vehicle body or a vehicle frame is disposed on the other end of the air spring.

{ZZWANZP-21001-AUUM/01311727v1} 13

In this example, the first threaded hole 153 is specifically disposed at top of the first sealing block in the air spring 100, and connected with the bearing vehicle body or the vehicle frame by a connecting plate 600; a positioning pin 154 is installed at the top of the first sealing block for positioning the air spring 100 when installing the air spring; the second threaded hole 164 is specifically disposed at bottom of the second sealing block in the air spring 100 for connecting with the lower suspension arm 400. The axle 399 is rotatably connected with the lower suspension arm 400 and the pull rod 500, respectively. The structure of the air spring is described in thefirst example.

Comfort of the vehicle is improved due to applying of the air spring in the first example in the vehicle suspension device 1000. The specific principle is described as follows: when the wheel 200 jumps up and down, the lower suspension arm 400 swings up and down at the moment, tire vibration is transmitted to the air spring 100 having elastic reinforcement member through the lower suspension arm 400, the air spring 100 moves up and down, and vibration is transmitted to the bearing vehicle body or the vehicle frame through the compressed air and the elastic reinforcement member 120 in the bellow space 111 of the air spring. Vibration of vehicle body is greatly reduced due to the ideal non-linear mechanical properties of the compressed air in the air spring 100 and the bellow 110, and due to the elastic reinforcement member 120 in the air spring, so that ride comfort of the vehicle is improved.

Although embodiments of the present disclosure have been described in the forgoing description, it is not only limited to the listed in the described herein and embodiments, it can be applied to various arts which are suitable for the present disclosure, for one with ordinary skill in the art, it can easily achieve other modifications, therefore, the present disclosure is not limited to the specific details and illustrations that are shown and described here when without deviating from the general concept that is limited by the claims and their equivalents.

{ZZWANZP-21001-AU U M/01311727v1} 14

Claims

1. An air spring, comprising:

a bellow, wherein a closed bellow space used for storing compressed gas is formed inside the bellow; a wall-body of the bellow is integrally vulcanized from an inner rubber layer, a first cord fabric layer, a second cord fabric layer and an outer rubber layer from inside to outside, cord threads of the first cord fabric layer and cord threads of the second cord fabric layer are tilted away from each other; and

an elastic reinforcement member disposed in the bellow space, wherein an extension and compression direction of the elastic reinforcement member is the same as that of the bellow.

2. The air spring of claim 1, further comprising at least one hoop-ring,

wherein the hoop-ring divides the bellow space into multiple air chambers along the extension and compression direction of the bellow, the multiple air chambers are communicated with each other;

wherein the air chambers are configured to have a cylindrical shape;

wherein the hoop-ring is embedded within the wall-body of the bellow so as to form an integrated structure;

wherein the elastic reinforcement member includes a coil spring.

3. The air spring of claim 2, further comprising a first sealing member and a second sealing member, wherein the first sealing member and the second member are used to respectively sealing two openings disposed at two ends of the bellow along the extension and compression direction of the bellow;

wherein the first sealing member comprises a first sealing block and a first pressing ring, the second sealing member comprises a second sealing block and a second pressing ring, a first antiskid groove is disposed at a joint of the first sealing block and an inner wall of the bellow, a second antiskid groove is disposed at a joint of the second sealing block and the inner wall of the bellow;

{ZZWANZP-21001-AU U M/01311727v1} 15 the first sealing block and the second sealing block respectively extend into the corresponding openings, the first sealing block and the second sealing block abut against the inner wall of the bellow, the first pressing ring and the second pressing ring are respectively sleeved on an outer wall of the bellow at a position corresponding to the first antiskid groove and the second antiskid groove, whereby the bellow is respectively pressed into the first antiskid groove and the second antiskid groove; wherein a first rubber pad and a second rubber pad are disposed at two ends of the elastic reinforcing member along the extension and compression direction of the elastic reinforcing member; the first rubber pad is disposed between the first sealing block and one end of the elastic reinforcing member, the second rubber pad is disposed between the second sealing block and the other end of the elastic reinforcing member.

wherein an accommodation cavity is formed on the first sealing block and extends toward the elastic reinforcement member, one end of the elastic reinforcement member is installed in the accommodation cavity; a bump is formed on the second sealing block and extends toward the elastic reinforcement member, the bump extends into a connection hole disposed at the other end of the elastic reinforcement member.

4. A method of assembling the air spring of claim 3, comprising steps of:

5. A vehicle suspension device, comprising: {ZZWANZP-21001-AUUM/01311727v1} 16 the air spring of any one of claims 1 to 3, an axle connected to wheels and a lower suspension arm connected to wheels; wherein a first threaded hole configured to connect with the lower suspension arm is disposed on one end of the air spring, a second threaded hole configured to connect with a bearing type vehicle body or a vehicle frame is disposed on the other end of the air spring.

{ZZWANZP-21001-AUUM/01311727v1} 17

170

154 150 extension 153 153 2021101360

151 130 152

120

compression 140 162

160 161

118 117

110 extension

180 119

FIG. 1

{ZZWANZP-21001-AUUM/01311727v1} 19

100 151

154 153 153

150 2021101360

170

117

180

160

FIG. 2

118 110

111a 111 117 111b

112 119

FIG. 3

{ZZWANZP-21001-AUUM/01311727v1} 20

2021101360

113 112 115

116

FIG. 4

110 115

114

FIG. 5

{ZZWANZP-21001-AUUM/01311727v1} 21

150 152

120 151 122

162 121

161

140 164 160 FIG. 6

{ZZWANZP-21001-AUUM/01311727v1} 22

154 150

155 2021101360

120 162

161 140

163 160

N FIG. 7

h=2r

d=r

163 160 N FIG. 8 {ZZWANZP-21001-AUUM/01311727v1} 23

200 1000 300

600

100 500

400

FIG. 9

{ZZWANZP-21001-AUUM/01311727v1} 24