KR20130050442A - Air spring having elastic member and suspension system using the same - Google Patents

Air spring having elastic member and suspension system using the same Download PDF

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Publication number
KR20130050442A
KR20130050442A KR1020110115496A KR20110115496A KR20130050442A KR 20130050442 A KR20130050442 A KR 20130050442A KR 1020110115496 A KR1020110115496 A KR 1020110115496A KR 20110115496 A KR20110115496 A KR 20110115496A KR 20130050442 A KR20130050442 A KR 20130050442A
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KR
South Korea
Prior art keywords
air
spring
upper plate
lower plate
elastic member
Prior art date
Application number
KR1020110115496A
Other languages
Korean (ko)
Inventor
강정일
차태형
Original Assignee
삼건중공업주식회사
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Publication date
Application filed by 삼건중공업주식회사 filed Critical 삼건중공업주식회사
Priority to KR1020110115496A priority Critical patent/KR20130050442A/en
Publication of KR20130050442A publication Critical patent/KR20130050442A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
    • B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
    • B60G11/27—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs wherein the fluid is a gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/048—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics with the regulating means inside the fluid springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/052—Pneumatic spring characteristics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/02—Spring characteristics, e.g. mechanical springs and mechanical adjusting means
    • B60G17/04—Spring characteristics, e.g. mechanical springs and mechanical adjusting means fluid spring characteristics
    • B60G17/052—Pneumatic spring characteristics
    • B60G17/0521—Pneumatic spring characteristics the spring having a flexible wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/925—Airbag deployment systems

Abstract

PURPOSE: An air spring equipping an elastic member and a suspension system comprising the same are provided to effectively absorb a load applied to a small or large vehicle and a shock applied to the large vehicle. CONSTITUTION: An air spring(100) comprises an upper plate(110), a lower plate(120), an airbag(130), and an elastic member(140). The upper and lower plates are arranged in parallel. The airbag seals a gap between the upper and lower plates. The airbag is shaped into bellows in order to vertically extend according to the inflow or outflow of air. The elastic member is arranged inside the airbag.

Description

Air spring having elastic member and suspension system comprising same {Air spring having elastic member and suspension system using the same}

The present invention relates to an air spring and an air suspension system having the same.

The air suspension system is an apparatus that supports the weight of the vehicle body by using the elasticity of the air, absorbs vibrations and shocks from the road surface, and attenuates irregular vibrations transmitted from the wheels to improve stability.

Air suspension systems are used in a variety of applications, from small cars such as private cars to large buses and large freight cars. Especially, large vehicles have heavy weights and travel on roads such as unpaved roads. Especially important.

One embodiment of the present invention relates to an air spring having an elastic member and an air suspension system including the same.

According to an aspect of the invention, the top plate having an air passage; A lower plate disposed to face the upper plate; It is provided between the upper plate and the lower plate, one end is combined with the upper plate and the other end is combined with the lower plate to define an internal space formed between the upper plate and the lower plate, and through the air passage A bellows-type air bag that expands and contracts in the vertical direction by the air introduced into the inner space; And a metallic material, provided in the inner space, an upper end of which is a free end that is not fixedly coupled to the upper plate, and a lower part of which is an elastic member fixedly coupled to the lower plate.

According to one feature of the invention, the air bag, the first rubber layer and the second rubber layer having elasticity; And a polyamide layer provided between the first rubber layer and the second rubber layer and integrally bonded to the first and second rubber layers.

According to another feature of the invention, the elastic member is a spiral wound shape, and includes a spring formed in a conical shape so that the diameter of the winding ring gradually decreases in a vertical direction from the lower plate toward the upper plate. Can be.

According to another feature of the invention, the diameter of the n-th (n is a natural number of 2 or more) winding ring of the winding ring may be formed larger than the diameter of the n-1 winding ring adjacent to the n-th winding ring.

According to another feature of the invention, the elastic member has a shell shape of the hollow inside, it may include a plurality of spring portion disposed along the bellows of the air bag.

According to another feature of the invention, the spring portion, the n-th (n is a natural number of two or more) spring portion fixedly coupled to the lower plate on the lower plate; And an n−1 th spring portion disposed on the n th spring portion and coupled to the n th spring portion through a fastening member.

According to another feature of the invention, the spring portion may include a plurality of holes for fluidly connecting the inner space of the spring portion and the inner space of the air bag.

According to another aspect of the present invention, there is provided an air suspension system having an air spring according to the above-described embodiment.

According to one embodiment of the present invention as described above, by using the shock absorber and the air spring at the same time, it is possible to effectively absorb the load of the large vehicle as well as the impact applied to the large vehicle.

In addition, according to one embodiment of the present invention, since it uses the elastic force of the metal constituting the spring or the spring portion as well as the pressure of the air can absorb the shock in two times to improve the efficiency and increase the service life.

1 is a perspective view schematically showing an air suspension system according to an embodiment of the present invention.
2 is a perspective view schematically showing an air spring according to an embodiment of the present invention.
3 is a cross-sectional view taken along line III-III of FIG. 3.
4A is a side view schematically illustrating an elastic member provided in the air spring of FIG. 2.
4B is a top view schematically illustrating an elastic member provided in the air spring of FIG. 2.
5 is a perspective view schematically showing an air spring according to another embodiment of the present invention.
FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 5.

The invention will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions. The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

1 is a perspective view schematically showing an air suspension system according to an embodiment of the present invention.

Referring to FIG. 1, the air suspension system 1 includes the first and second frames 10 and 20 and the axle 30 and the brackets (not shown) provided in parallel with each other. A shock absorber 40 connected to the axle 30 through a shock absorber 40, a stabilizer bar 50 connected to the first and second frames 10 and 20, It may include a radial rod (60) and a torque rod (70) connected to the axle 30 through a bracket (not shown), and the air spring (80).

Both ends of the axle 30 may be connected to wheels (not shown) of the tire of the vehicle. The axle 30 extends in the transverse direction to cross the first and second frames 10, 20, and through the bracket (not shown) various members, such as stabilizer bar 50, radial rod 60. It may be connected to the torque rod 70 and the shock absorber 40.

The shock absorber 40 may be mounted between the vehicle body and the wheels to maintain the garage and support the weight of the vehicle to mitigate the impact that the vehicle receives from the ground.

Stabilizer bar 50 is installed so as to cross the transverse direction of the body, by reducing the rolling phenomenon occurring in the body to prevent the departure of the axle and improves the stability of the running. One end of the stabilizer bar 50 may be connected to one side of the axle 30 through a bracket (not shown), and the other end may be connected to the other side of the axle 30 through a bracket (not shown). In this case, the bracket may have an installation structure connected to the axle 30 while wrapping the bushing fitted to one end of the stabilizer bar 50.

The radial rod 60 is installed in the front-rear direction to absorb the force acting in the front-rear direction of the vehicle body, thereby improving the stability of the running. One end of the radial rod 60 may be connected to the central region of the axle 30 through a bracket, and the other end may be connected to the vehicle body.

When the axle 30 swings due to shock and vibration applied to the vehicle, the torque rod 70 absorbs shock and vibration while rotating about a predetermined axis to improve driving stability. One end of the torque rod 70 may be connected to the axle 30 through a bracket (not shown), and the other end may be connected to a central axis (not shown) transverse to the vehicle body.

The first and second frames 10 and 20 extend along the longitudinal direction and are disposed in parallel with each other at predetermined intervals. The first frame 10 and the second frame 20 may be combined with the axle 30. The first and second frames 10 and 20 may support an air spring 80 for absorbing the shock transmitted from the road surface of the vehicle to the vehicle body through the tire and the axle.

The air spring 80 may absorb vibrations transmitted to the vehicle body by using hydraulic pressure according to inflow and discharge of air. Hereinafter, the structure of the air spring 80 will be described in detail with reference to FIGS. 2 to 6.

2 is a perspective view schematically illustrating an air spring according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2. In FIG. 2, a part of the air bag is opened for convenience of description.

2 and 3, the air spring 100 is an air bag for sealing the space between the upper plate 110 and the lower plate 120, the upper and lower plates 110, 120 disposed in parallel with each other ( 130, and an elastic member 140 provided in the air bag 130.

The upper plate 110 and the lower plate 120 are arranged in a plate shape having a predetermined rigidity and spaced apart from each other at a predetermined interval to be parallel to each other. The upper end of the air bag 130 is coupled with the edge of the upper plate 110, and the lower end of the air bag 130 is coupled with the edge of the lower plate 120, so that the air bag 130 is connected to the upper plate 110 and the lower part. The space between the plates 120 may be sealed. For example, the air bag 130, the upper plate 110, and the lower plate 120 may be coupled through adhesion.

As the air bag 130 is combined with the upper and lower plates 110 and 120, an inner space I1 of the air spring 100 is defined, and air is introduced into or discharged into the inner space I1 of the air spring 100. At a pressure of 100, the air spring 100 may exert elasticity.

In general, the gas has a property of inversely proportional to the pressure at a constant temperature. For example, compressing a gas to 1/2 volume can double the pressure and thus double the repulsive force. By using such a property of air it is possible to implement the elasticity of the air spring (100).

An air passage 112 is formed in the upper plate 110 for inflow and / or discharge of air. The air passage 112 may be fluidly connected to the air tank (not shown) through a tube (not shown). Air may be introduced or discharged by the control of the leveling valve 90 shown in FIG. 1. In this embodiment, by forming only one path through which air, that is, compressed air, it is possible to minimize the element from which air can leak.

In this embodiment, the case where air is introduced or discharged through one air passage 112 has been described, but the present invention is not limited thereto. In another embodiment, a passage through which air is introduced and a passage through which air is discharged may be formed separately.

The air bag 130 is formed in a bellows-type corrugated so as to expand and contract along the up and down direction according to the inflow or discharge of air. The air bag 130 may include a rubber material to increase or decrease the length according to the stretching movement. For example, the air bag 130 may include rubber layers 131 and 132 and a polyamide layer 133.

Referring to the enlarged portion of FIG. 2, the first and second rubber layers 131 and 132 are provided to face the inner space I1 and the outer space of the air spring 100, respectively, and the polyamide layer 133 It is interposed between the first and second rubber layers 131 and 132. One surface of the polyamide layer 133 is in contact with the first rubber layer 131, the other surface is integrated in contact with the second rubber layer 132, and nylon may be used as the polyamide layer 133.

Durability can be improved by interposing the polyamide layer 133 between the elastic first and second rubber layers 131 and 132. Therefore, tearing of the air bag 130 can be prevented.

The elastic member 140 is disposed in the inner space I1 of the air spring 100. Therefore, the air spring 100 according to the embodiment of the present invention is provided with a damper using the air pressure and a damper using the elastic member 140.

That is, from a functional point of view, the air spring 100 according to the embodiment of the present invention includes two dampers, a first damper using air pressure and a second damper using the elastic member 140. Since the load applied to the vehicle body may be distributed to each of the first damper and the second damper, the service life of the air spring 100 may be increased.

Since the first damper can change the spring constant by adjusting the amount of air, the pressure, and the like, the first damper can absorb even minute vibrations. As the second damper, the elastic member 140 absorbs the vibrations by using the elastic force of the metal, thereby causing a strong vibration. It can absorb and thus can perform a complementary function with each other.

For example, when the airbag 130 is torn or broken due to an accident during driving of the vehicle, the elastic member 140 may be used as a secondary damper. When the airbag 130 is torn or damaged and the first damper is difficult to function properly, the elastic member 140 may prevent the vehicle from tilting to prevent a large accident, and the vehicle may move to a garage or a garage. It can guarantee some stability.

The lower portion of the elastic member 140 is fixedly coupled to the lower plate 120, the upper portion may be a free end that is not fixed to the upper portion. For example, an upper portion of the elastic member 140 may be spaced apart from the plate 110 by a predetermined interval g1. Therefore, the damper function by the elastic member 140 and the damper function using the air bag 130 are implemented independently of each other. Therefore, when the air bag 130 is damaged, the elastic member 140 may function as a secondary damper, and the load applied to the vehicle body is distributed to the damper by hydraulic pressure and the damper by the elastic member 140. Can be.

The elastic member 140 may use a coiled spring including a metallic material. For example, the elastic member 140 may include tungsten, iron or an alloy thereof. The coiled spring may have a spiral shape and may be formed in a conical shape so that the diameter of the winding ring gradually decreases in a vertical direction from the lower plate 120 toward the upper plate 110. Hereinafter, the elastic member 140 according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 and 4.

4A is a side view schematically showing the elastic member 140 provided in the air spring of FIG. 2, and FIG. 4B is a top view schematically showing the elastic member 140 provided in the air spring of FIG. 2. .

The elastic member 140 is wound around a shaft passing through the center in a spiral form and is conical in shape. The n-1th winding ring 147 is provided on the nth winding ring 147 (n is a natural number of 2 or more), and the diameter Dn of the nth winding ring 147 is the n-1th winding ring 146. Since it is formed larger than the diameter (Dn-1) of the friction between the winding does not occur even if the elastic member 140 is compressed. Therefore, noise is generated by the friction between the windings, and the shape is minimized even if the elastic member 140 is used for a long time.

5 is a perspective view schematically showing an air spring according to another embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5. In FIG. 5, a part of the air bag is opened for convenience of description.

5 and 6, the air spring 200 is an air bag for sealing the space between the upper plate 210 and the lower plate 220, the upper and lower plates 210, 220 disposed in parallel to each other ( 230, an elastic member 240 provided in the air bag 230 may be included.

The upper plate 210 and the lower plate 220 are arranged in parallel with each other at a predetermined interval spaced apart in a plate shape having a predetermined rigidity. The upper end of the air bag 230 is coupled to the edge of the upper plate 210, and the lower end of the air bag 230 is coupled to the edge of the lower plate 220, so that the air bag 230 is connected to the upper plate 210 and the lower part. The space between the plates 220 may be sealed. For example, the air bag 230, the upper plate 210, and the lower plate 220 may be coupled through adhesion.

By combining the air bag 230 with the upper and lower plates 210 and 220, an inner space I1 of the air spring 200 is defined, and air is introduced into or discharged into the inner space I1 of the air spring 200. As described above, the air spring 200 can exert elasticity.

An air passage 212 is formed in the upper plate 210 for inflow and / or discharge of air. The air passage 212 may be fluidly connected to the air tank (not shown) through a tube (not shown).

In this embodiment, the case where air is introduced or discharged through one air passage 212 is described, but the present invention is not limited thereto. In another embodiment, a passage through which air is introduced and a passage through which air is discharged may be formed separately.

The air bag 230 is formed in a bellows-type corrugated so as to be able to expand and contract along the up and down direction according to the inflow or discharge of air. The air bag 230 may include a rubber material so that the length of the air bag 230 may increase or decrease according to the stretching movement. For example, as described above, the air bag 230 may include the first and second rubber layers 231 and 232 and the polyamide layer 233 disposed therebetween.

The elastic member 240 is provided in the internal space I1 of the air spring 200 and may include a plurality of spring parts 241, 242, and 243. Therefore, the air spring 200 according to the embodiment of the present invention is provided with a damper using the air pressure and a damper using the elastic member 240. That is, from a functional point of view, the air spring 200 according to the embodiment of the present invention includes two dampers, a first damper using air pressure and a second damper using the elastic member 240. Since the load applied to the vehicle body may be distributed to each of the first damper and the second damper, the service life of the air spring 200 may be increased.

Since the first damper can change the spring constant by adjusting the amount of air, the pressure, and the like, the first damper can absorb even minute vibrations. As the second damper, the elastic member 240 absorbs the vibrations by using the elastic force of the metal, thereby causing a strong vibration. As can be absorbed as described above can perform a complementary function with each other.

The spring parts 241, 242, and 243 have a hollow shell shape, and the elastic member 240 may include a metallic material such as tungsten, iron, or an alloy thereof. Each spring portion 241, 242, 243 may be disposed along the bellows bend of the air bag 230. For example, one spring portion 241, 242, 243 may be provided for each bellows bend. The plurality of spring parts 241, 242, and 243 may have the same or different elastic modulus, respectively. In the following description, it is assumed that three spring parts are provided for convenience of description.

The spring parts 241, 242, and 243 may be physically coupled through the fastening member 350. For example, the first spring part 341 and the second spring part 242 may be coupled to each other, and the second spring part 242 may be coupled to the third spring part 243 to form the elastic member 240.

If the first, second, and third spring parts 241, 242, and 243 are coupled through one fastening member, when the external force acts on the elastic member 240, the spring parts 241, 242, and 243 are connected to the fastening member. Since it is constrained and inflexible, the impact absorption efficiency is lowered. However, the elastic member 240 according to the embodiment of the present invention connects the first and second spring parts 241 and 242 using the fastening member 250, and connects the second and third spring parts 242 and 243. By connecting, the shock absorption efficiency can be improved by inducing a change in shape between the first and second spring parts 241 and 242 and a change in shape between the second and third spring parts 242 and 243 by the external force, respectively. This effect is greater when the elastic modulus of the first, second, and third spring parts 241, 242, and 243 are different from each other.

The lower portion of the elastic member 240 is fixedly coupled to the lower plate 220, the upper portion may be a free end that is not fixedly coupled to the upper plate 210. For example, an upper portion of the elastic member 240 may be spaced apart from the upper plate 210 by a predetermined distance g2. For example, the third spring portion 243 is fixed to the lower plate 220 through a separate fastening member 260, and the first spring portion 241 is provided to be spaced apart from the upper plate 210.

Therefore, the damper function by the elastic member 240 and the damper function using the air bag 230 are implemented independently of each other. Therefore, when the air bag 230 is damaged, the elastic member 240 may function as a secondary damper, and the load applied to the vehicle body is distributed to the damper by hydraulic pressure and the damper by the elastic member 240. Can be.

The spring parts 241, 242, and 243 may include a plurality of holes h. The physical coupling between the spring parts 241, 242, and 243 may be made through the hole h. For example, after stacking the first and second spring parts 241 in a state in which a fastening member 250 such as a screw or bolt is seated on the first spring part 241, a small driver (not shown) is formed through the hole h. The first and second spring parts 241 and 242 may be fastened by inserting the screw and tightening the screw or bolt.

In addition, the holes h formed in the spring parts 241, 242 and 243 fluidly connect the internal space I2 of the spring parts 241, 242 and 243 and the internal space I1 of the air bag 230. Can connect

As a comparative example of the present invention, a case in which the spring part is a closed shell shape will be described. When an external force acts on the closed shell-shaped spring part, the shape of the spring part is deformed by the external force, and the volume of the inner space of the spring part is changed while the shape is deformed. As the volume of the inner space of the spring portion changes, it is caused by the repulsive force of the fluid provided in the inner space of the spring portion. The repulsive force acts opposite to the direction of action of the external force, thereby lowering the shock absorption efficiency of the spring portion. Such a problem may be greater when the first damper and the second damper are simultaneously implemented.

For example, when the length of the air bag changes and absorbs an external shock as the outside air enters or discharges the air spring, and at the same time, the elastic member also absorbs the external shock, the shell of the spring part is caused by the pressure of the outside air and the inside of the spring part. The pressure provided by the fluid can be simultaneously received. That is, since an unbalance of pressure acting on the spring portion may occur, the elastic member is difficult to exert its function.

However, since the spring parts 241, 242, 243 according to the embodiment of the present invention have a shell shape in which a plurality of holes h are formed, the spring parts 241, 242, 243 may be deformed even by the external force. Since the fluid provided inside 241, 242, and 243 may freely enter and exit the inner space I1 of the air bag 230, that is, the space between the air bag 230 and the spring parts 241, 242, and 243. The force applied to the spring portions 241, 242, 243 is nothing other than the force by external impact. In other words, there is no fear that an unbalance due to the pressure between the fluids acting on the closed shell-shaped spring portion may occur in the elastic member 240 according to the embodiment of the present invention.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications or variations without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover all such modifications and variations as fall within the true spirit of the invention.

1: air suspension system 10: first frame
20: second frame 30: axle
40: shock absorber 50: stabilizer bar
60: Radius Rod 70: Torque Rod
80, 100, 200: air spring 90: leveling valve
110, 210: upper plate 112, 212: air passage
120, 220: lower plate 130, 230: air bag
140, 240: elastic member 146: n-1th winding (winding ring)
147: n-th winding ring 241: First spring portion
242: second spring portion 243: third spring portion
250, 260: fastening member

Claims (8)

An upper plate having an air passage;
A lower plate disposed to face the upper plate;
It is provided between the upper plate and the lower plate, one end is combined with the upper plate and the other end is combined with the lower plate to define an internal space formed between the upper plate and the lower plate, and through the air passage A bellows-type air bag that expands and contracts in the vertical direction by the air introduced into the inner space; And
An elastic spring comprising a metallic material, provided in the inner space, the upper end is a free end that is not fixedly coupled to the upper plate and the lower part is fixedly coupled to the lower plate. The method of claim 1,
The air bag,
A first rubber layer and a second rubber layer having elasticity; And
And a polyamide layer provided between the first rubber layer and the second rubber layer and integrally bonded to the first and second rubber layers. The method of claim 1,
The elastic member
A spirally wound shape, the air spring comprising a spring formed in a conical shape so that the diameter of the winding ring gradually decreases in a vertical direction from the lower plate toward the upper plate. The method of claim 3,
The air spring of the n-th winding (n is a natural number of two or more) of the winding ring is formed larger than the diameter of the n-1 winding ring adjacent to the n-th winding ring. The method of claim 1,
The elastic member
An air spring having a hollow shell shape and including a plurality of spring parts disposed along a bellows curve of the air bag. The method of claim 5,
The spring portion,
An n-th spring portion (n is a natural number of two or more) fixedly coupled to the lower plate on the lower plate; And
An n-1 th spring portion disposed on the n th spring portion and engaged with the n th spring portion through a fastening member. The method of claim 5,
The spring portion,
An air spring comprising a plurality of holes for fluidly connecting the inner space of the spring portion and the inner space of the air bag. First and second frames arranged in parallel to each other;
An axle provided to cross the first and second frames and having both ends coupled to a wheel;
A shock absorber having one end coupled to the axle and the other end coupled to the vehicle body; And
An air spring provided on the first and second frames and coupled to the vehicle body;
The air spring,
An upper plate having an air passage;
A lower plate disposed to face the upper plate;
It is provided between the upper plate and the lower plate, one end is combined with the upper plate and the other end is combined with the lower plate to define an internal space formed between the upper plate and the lower plate, and through the air passage A bellows-type air bag that expands and contracts in the vertical direction by the air introduced into the inner space; And
An elastic member including a metallic material, provided in the inner space, an upper end of which is a free end which is not fixedly coupled to the upper plate, and a lower part of which is fixedly coupled to the lower plate.
KR1020110115496A 2011-11-08 2011-11-08 Air spring having elastic member and suspension system using the same KR20130050442A (en)

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* Cited by examiner, † Cited by third party
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CN109159790A (en) * 2018-11-05 2019-01-08 青岛宏达青田交通设备有限公司 Automatic inflatable/air outer hood and EMU
CN110386159A (en) * 2019-06-19 2019-10-29 湖南铁路科技职业技术学院 A kind of railroad train bogie
KR20210147287A (en) * 2020-05-28 2021-12-07 주식회사화신 Suspension apparatus for vehicle

Cited By (3)

* Cited by examiner, † Cited by third party
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CN109159790A (en) * 2018-11-05 2019-01-08 青岛宏达青田交通设备有限公司 Automatic inflatable/air outer hood and EMU
CN110386159A (en) * 2019-06-19 2019-10-29 湖南铁路科技职业技术学院 A kind of railroad train bogie
KR20210147287A (en) * 2020-05-28 2021-12-07 주식회사화신 Suspension apparatus for vehicle

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