JP2000337420A - Air suspension device for car height regulation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air suspension device for car height regulation to more reduce the length and the diameter of a coil spring, reducing the burden of the load of an air suspension through the partial burden of a load, than those of a conventional type. SOLUTION: An air suspension device for car height regulation is provided with a shock absorber 1, a chamber 2, and a diaphragm 3, and provided at the lower end of a cylinder barrel 1a integrally formed with a lower mounting part 5 and at the upper end of the chamber 2 integrally formed with an upper mounting part 4. A coil spring 6 mounted in a manner to surround a chamber 2 is nipped, in a flywheel-form state, between upper and lower spring supports 7 and 8. The upper spring support 7 is fitted in a covering state in the upper mounting part 4 and securely brought into contact with the upper surface of the chamber 2. Further, the lower spring support 8 is fitted in a covering state in the lower mounting part 5 and supported by a support tool 9. A high pressure flow port 10 situated on the upper side of the chamber 2 is formed in an L- shape, a high pressure air feed passage 11 is extended through a small hole 7a opened to the upper spring support 7 to the inside of the soil spring 6 and connected to a high pressure air flow port 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air suspension apparatus for adjusting a vehicle height, which can reduce a load on a diaphragm by mounting a coil spring that partially bears a load and can prevent damage to the diaphragm when traveling on a rough road. .

[0002]

2. Description of the Related Art An air suspension structure for adjusting a vehicle height disclosed in Japanese Patent Application Laid-Open No. 9-42349 has a coil spring that partially bears a load, can reduce the load on the diaphragm, and can damage the diaphragm when traveling on a rough road. Can be prevented. This air suspension structure is
Is large in diameter. Therefore, if a coil spring is provided outside the chamber 6, the diameter in the radial direction is further increased. To avoid this, a cylindrical coil spring sheet 7 is provided, and the spring receiving portion 10 is attached to the lower side of the diaphragm 5. The coil spring 13 is supported in an energized state by the spring receiving portion 10 and the spring receiving portion 12 fitted and fixed to a lower portion of the outer shell 1.

[0003]

In the above-described air suspension structure, the coil spring 13 is mounted below the diaphragm 5, and the length of the coil spring 13 cannot be ensured to be large. Further, in the above air suspension structure, since the stroke length guaranteed by the diaphragm 5 is short, the length of the coil spring 13 is also small. However, some drivers want to drive or park at a significantly higher height than standard, while others want to drive or park at significantly lower height than standard. There is a request. In response to this request,
The above-described conventional air suspension structure includes a diaphragm 5
Cannot be accommodated because of the short stroke length and the short length of the coil spring 13. I think that the conventional air suspension structure described above is suitable for slightly adjusting the vehicle height with respect to the standard vehicle height.

An object of the present invention is to provide an air suspension apparatus for adjusting a vehicle height, which can reduce a load on a diaphragm by mounting a coil spring that partially bears a load and can prevent damage to the diaphragm when traveling on a rough road. It is an object of the present invention, especially if the length of the coil spring can be secured longer than before and the suitable range of the biasing force of the coil spring can be expanded, so that the driver wants to drive the vehicle at a height higher than the standard. Alternatively, it is possible to satisfactorily correspond to one of the desires to park and the desire to drive or park the vehicle at a lower height than the standard, and to reduce the diameter of the coil spring more than before. The purpose of the present invention is to provide an air suspension structure for adjusting the vehicle height that can reduce the mounting space.

[0005]

According to a first aspect of the present invention, there is provided a shock absorber and a small-diameter cylindrical member which accommodates the shock absorber through an opening at a lower end and a space around the shock absorber is a small space having a diaphragm accommodation portion. And the upper end of the small-diameter tube is fixedly fitted to the upper part of the cylinder tube of the shock absorber, and the upper end of the large-diameter tube outside the small-diameter tube is fixedly fitted to the lower part of the chamber. It has a flexible diaphragm in which the lower end of the small-diameter cylindrical portion shifts to the lower end of the large-diameter cylindrical portion by the relative movement of the chamber. Or, a vehicle height adjusting air suspension device integrally having an upper mounting portion at an upper end of a piston rod penetrating the chamber, wherein the air suspension device surrounds the chamber. The upper spring receiver and the lower spring receiver sandwich the coil spring attached in an energized state, the upper spring receiver is engaged and supported by an upper mounting portion, and the lower spring receiver is a cylinder cylinder. An L-type high pressure provided on the upper side surface of the chamber is supported by a bracket which is located at a position substantially corresponding to the large-diameter cylindrical portion of the diaphragm when fully retracted into the chamber and is engaged and supported by the lower mounting portion. An air communication port is provided with its opening facing upward, and a high-pressure air supply path is configured to pass through a small hole opened in the upper spring receiver, pass through the inside of the coil spring, and connect to the high-pressure air communication port. It is another object of the present invention to provide a vehicle height adjusting air suspension device.

The second invention of the present application is directed to a shock absorber, a small-diameter cylindrical chamber which accommodates the shock absorber from a lower end opening, and a space around the shock absorber is a small space having a diaphragm accommodation portion. The upper end of the part is fitted and fixed on the upper part of the cylinder cylinder of the shock absorber, and the upper part of the large diameter part outside the small diameter part is fitted and fixed on the lower part of the chamber. A flexible diaphragm having a lower end of the small-diameter cylindrical portion shifted to a lower end of the large-diameter cylindrical portion, a lower mounting portion integrated with a lower end of the cylinder cylinder, and a piston penetrating the upper end of the chamber or the chamber. A vehicle height adjusting air suspension device integrally having an upper mounting portion at an upper end of a rod, which is attached so as to surround a chamber. The upper spring receiver is sandwiched between the upper spring receiver and the lower spring receiver in a state of energy accumulation, and the upper spring receiver is fixed at a position slightly lower than the high-pressure air inlet provided on the upper side surface of the chamber. An object of the present invention is to provide an air suspension device for adjusting a vehicle height, wherein a side spring receiver is fitted on the lower mounting portion and is abutted and fixed to a lower surface of a cylinder cylinder.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle height adjusting air suspension device according to a first embodiment of the present invention will be described with reference to FIG. The vehicle height adjusting air suspension device includes a shock absorber 1, a chamber 2, a diaphragm 3, an upper mounting part 4, a lower mounting part 5, a coil spring 6, an upper spring receiver 7, a lower spring receiver 8, a bracket 9, a high pressure The upper mounting portion 4 is connected to an upper connecting portion A which is an air suspension connecting portion provided on the chassis, and the lower mounting portion 5 is provided on a bearing member for receiving an axle. This is a structure that is connected to a lower connection portion B that is a suspension connection portion. Upper connection part A
And the lower connecting portion B not only approach and separate in the vertical direction,
When moving relative to each other in the horizontal direction, both are provided with a degree of freedom.

[0008] The shock absorber 1 is a cylinder cylinder 1a.
, A piston 1b, a piston rod 1c, a shaft sealing device 1d, and a bottom cover 1e. A valve 1f provided on the bottom cover 1e is filled with a high pressure nitrogen gas or the like for pressurizing hydraulic oil filling the cylinder cylinder 1a. Become. The encapsulated nitrogen gas moves to the upper side of the piston 1b. The shock absorber 1 always urges the piston rod 1c in a protruding direction. This is because under the condition that no external force is applied to the cylinder cylinder 1a and the piston rod 1c, the high-pressure hydraulic oil sealed in the cylinder cylinder 1a acts on the upper and lower surfaces of the piston 1b.
There is a difference in the size of the area between the upper surface and the lower surface (the lower surface is larger by the sectional integral of the piston rod 1c), so that a pressure difference is generated and the piston rod 1c is constantly urged in the protruding direction. The bottom lid 1e is fitted to the lower end of the cylinder tube 1a and is caulked. In this embodiment, the bottom lid 1e
Is formed integrally with a stud bolt 5a constituting the lower mounting portion 5.

The chamber 2 comprises a cylinder 2a and an end plate 2b, and has a generally elongated bell shape with a lower end open and an upper end closed. In this embodiment, the end plate 2b is formed integrally with the piston rod 1c and the stud bolt 4a constituting the upper mounting portion 4. When assembling this device, the piston rod 1c is turned upside down so as to be above the end plate 2b, the spring 11 is passed through the piston rod 1c, the cylinder cylinder 1a is fitted onto the piston rod 1c, and the piston 1b
And fill the cylinder cylinder 1a with nearly 90% of the volume of oil, and then attach the bottom lid 1e.
Nitrogen gas or the like is sealed under high pressure. Then, chamber 2
Is to apply a binder to the periphery of the end plate 2b, which is provided with an upper mounting portion 4 integrally with the cylinder 2a heated to a high temperature, and to pass the end plate 2b from the bottom. 2b are shrink-fitted together. With this configuration, the configuration can be simplified, the number of parts and the number of assembly steps can be reduced, and strength can be imparted. The chamber 2 has a small-diameter cylindrical shape in which the shock absorber 1 is accommodated through an opening at the lower end, and a space around the shock absorber 1 remains only in a small space having a diaphragm accommodation amount.
Since the piston rod 1c does not penetrate the head plate 2b, the shaft sealing device does not need to be attached to the head plate 2b. Therefore, the chamber 2 has a small-diameter cylindrical shape. On the other hand, since the upper end of the piston rod 1c is not connected to the upper connecting portion A, which is the connecting portion of the vehicle body to the air suspension, the stud bolt 4a forming the upper mounting portion 4 is integrated with the end plate 2b forming the chamber 2. It is provided in.

The diaphragm 3 is made of a flexible material such as silicone rubber, and the upper end of the small-diameter cylindrical portion 3a is fitted over the upper portion of the cylinder tube 1a of the shock absorber 1, and is fastened and fixed by the tightening ring 12. The upper end of the large-diameter cylindrical portion 3b outside the small-diameter cylindrical portion 3a is fitted to the lower portion of the chamber 2 and fastened and fixed by the tightening ring 13, and the relative movement of the shock absorber 1 and the chamber 2 causes the small-diameter cylindrical portion 3a to move. Has a flexible shape in which the lower end moves to the lower end of the large-diameter cylindrical portion 3b. The diaphragm 3 fixes the upper end of the small-diameter tube portion 3a to the upper portion of the cylinder tube 1a before shrink-fitting the cylinder 2a to the end plate 2b of the chamber 2.

The coil spring 6 is attached so as to surround the chamber 2, and the coil spring 6 is sandwiched between the upper spring receiver 7 and the lower spring receiver 8 in a charged state. The upper spring receiver 7 is fitted on the upper mounting portion 4 and is fixed in contact with the upper surface of the chamber 2. The lower spring receiver 8 is located at a position substantially corresponding to the large-diameter tube portion 3b of the diaphragm 3 when the cylinder tube 1a is most retracted into the chamber 2, and is fitted to the lower mounting portion 5 and the cylinder tube 1a. Is supported by a cylindrical bracket 9 abutted and fixed to the lower surface of the. In the figure, the lower spring receiver 8 and the bracket 9 are formed integrally.

In this embodiment, the upper mounting portion 4 is
Stud bolt 4 integrally formed on the upper end of chamber 2
a and nuts 4b, 4 screwed into the stud bolt 4a.
c and a lock bolt 4d. Also, the lower mounting part 5
Comprises a stud bolt 5a in which a lower mounting portion 5 is integrally formed with a lower lid constituting a cylinder cylinder 1a of the shock absorber 1, a spring washer 5b, a nut 5c, and a lock nut 5d. Note that the upper mounting portion 4 and the lower mounting portion 5 are not limited to the above-described configuration, but are variously different depending on the type of vehicle. It is sufficient to use an appropriate connection structure that can be adapted to each of the above.

The high-pressure air passage 10 is L-shaped and is provided on the upper side surface of the chamber 2 with the connection port facing upward.
It is configured such that it can be connected to a high-pressure air supply path H that passes through the small hole 7 a opened in the upper spring receiver 7 and passes through the inside of the coil spring 6.

Next, the operation of the vehicle height adjusting air suspension device having the above configuration will be described with reference to FIGS. In the state of FIG. 1, the cylinder height is the lowest because the cylinder cylinder 1 a of the shock absorber 1 is fully retracted into the chamber 2. In this state, the shock absorber 1 does not work and the air suspension does not function. To increase the vehicle height, high-pressure air flows into the chamber 2 through the high-pressure air passage 10. Then, the pressure of the high-pressure air acts on the cylinder 1 of the shock absorber 1, and the cylinder 1 extends from the chamber 2. The piston rod 1c relatively moves so that the cylinder tube 1 extends from the chamber 2 (absolute movement does not occur).
Further, at this time, the lower spring receiver 8 moves integrally with the cylinder cylinder 1 to increase the distance between the lower spring receiver 8 and the upper spring receiver 7, and the urging force of the coil spring 6 is reduced. A part of the maximum load in the direction of retracting the cylinder cylinder 1 into the chamber 2 which may occur when traveling on a rough road is partially shared by the coil spring 6,
The rest is shared by the shock absorber 1. According to the present invention, since the length of the coil spring 6 can be increased, the stroke length of the shock absorber 1 can also be increased. As a result, the spring constant can be made smaller than before, and the appropriate range of the biasing force of the coil spring 6 can be widened. Most preferably,
The spring constant is considerably reduced by reducing the wire diameter and increasing the pitch for a part of the coil spring 6 (for example, 1/3 of the number of turns). And the coil spring 6 has an optimal value when the vehicle height is set to a standard height so that an appropriate load is shared. When the height is minimized, it is preferable that the portion where the wire diameter of the coil spring 6 is small greatly reduces the pitch. Therefore, the load of the coil spring 6 is set to an appropriate value regardless of whether the driver wants to drive or park the vehicle at a height higher than the standard or to drive or park the vehicle at a height lower than the standard. Can be made to correspond. Although the length of the coil spring 6 changes, the high-pressure air is caused to flow into the chamber 2 from the high-pressure air passage 10 through the high-pressure air supply path H that passes through the inside of the coil spring 6. It does not hinder the supply and discharge of high-pressure air into the interior. The vehicle is parked with the cylinder cylinder 1 fully retracted into the chamber 2 and the vehicle height set to the lowest level. In order to increase the vehicle height during operation, high-pressure air is passed through the high-pressure air flow opening 10 through the chamber. When the air flows into the cylinder 2, the bias of the coil spring 6 acts in the direction of increasing the vehicle height, so that the cylinder cylinder 1 can be quickly pushed out of the chamber 2 and the vehicle height can be adjusted quickly.

Next, a vehicle height adjusting air suspension device according to a second embodiment of the first invention will be described with reference to FIG. The vehicle height adjusting air suspension device includes a shock absorber 1, a chamber 2, a diaphragm 3, an upper mounting part 4, a lower mounting part 5, a coil spring 6, an upper spring receiver 7, a lower spring receiver 8, a bracket 9, a high pressure It has a structure in which the upper mounting portion 4 is connected to the upper connecting portion A, and the lower mounting portion 5 is connected to the lower connecting portion B, which is composed of the air flow openings 10. The difference from the device shown in FIG. 1 is that the shock absorber 1 includes a cylinder cylinder 1a and a piston 1b.
, Piston rod 1c, shaft sealing device 1d, and shaft sealing device 1d
And a pressurizing mechanism 1g that presses the oil strongly to pressurize the hydraulic oil filling the cylinder cylinder 1a. The cylinder cylinder 1a is further fitted with a lower lid at the lower end of the cylinder and connected by caulking (screw connection or welding). And the upper lid is fitted on the upper end of the cylinder and caulked, and the stud bolt 5a constituting the lower mounting portion 5 is integrally formed on the lower lid constituting the cylinder cylinder 1a; A chamber 2 has a cylindrical plate 2a heated to a high temperature and a top plate 2b integrally provided with an upper mounting portion 4, a binder is applied to the periphery of the plate 2b, and a binder is passed through the bottom plate 2b from below. The upper end of the piston rod 1c is received by the inverted mortar-shaped inner surface of the end plate 2b and is welded and fixed so as not to be separated.

A vehicle height adjusting air suspension device according to a first embodiment of the second invention will be described with reference to FIG. A shock absorber 1, a small-diameter chamber 2 accommodating the shock absorber from a lower end opening, and having an upper end closed, and an upper end of a small-diameter cylindrical portion 3a made of a flexible material fixed to an upper portion of a cylinder tube 1a of the shock absorber 1. At the same time, the upper end of the large-diameter cylindrical portion 3b outside the small-diameter cylindrical portion 3a is fitted and fixed to the lower portion of the chamber 2, and the lower end of the small-diameter cylindrical portion 3a is moved by the relative movement of the shock absorber 1 and the chamber 2. Diaphragm 3 having a flexible shape that moves to the lower end of portion 3b
And a lower mounting portion 5 integrally formed at the lower end of the cylinder tube 1a and an upper mounting portion 4 integrally formed at the upper end of the chamber 2. The piston 1b of the fluid pressurized and sealed in the cylinder tube 1a For adjusting the vehicle height, the piston rod 1c is constantly urged in a protruding direction by the pressure difference acting on both surfaces of the chamber 2 and the upper end of the piston rod 1c is received and fixed by the upper end of the inverted mortar-shaped inner surface of the chamber 2. In the air suspension device, a coil spring 6 attached so as to surround the chamber 2 is sandwiched between an upper spring receiver 7 and a lower spring receiver 8 in a state of energy storage, and the upper spring receiver 7 is located above the chamber 2. The lower spring receiver 8 is fixed to the lower mounting portion 5 and abuts on the lower surface of the cylinder tube 1a. The lower spring receiver 8 is fixed at a position slightly lower than the high-pressure air inlet 10 provided on the side surface. . 3 is different from the apparatus shown in FIG. 3 in that the coil spring 6 is provided below the high-pressure air inlet 10 so as to surround the lower half of the chamber 2 and the outside of the diaphragm 3. The entrance 10 is L
It is not necessary to bend the mold. For this reason, the upper spring receiver 7 is shaped like a bell with a slit so as not to interfere with the high-pressure air inflow port 10 and is screwed to the bracket 14 that covers the upper half of the chamber 2 exactly. The height of the upper spring receiver 7 can be adjusted so that the biasing force of the coil spring 6 can be adjusted, and the lower mounting portion 5 has a hinge structure and is pin-connected to the lower connecting portion B. It is that you are. The air suspension device for adjusting the vehicle height according to this embodiment can also reduce the diameter of the coil spring 6 and the coil spring 6.
Since a large diameter can be secured, the same operation and effect as in the apparatus of FIG. 1 can be obtained.

Next, a vehicle height adjusting air suspension device according to a second embodiment of the second invention of the present application will be described with reference to FIG. A vehicle height adjustment air suspension having a shock absorber 1, a chamber 2, and a diaphragm 3, integrally having a lower mounting portion 5 at a lower end of a cylinder tube 1a, and integrally having an upper mounting portion 4 at an upper end of the chamber 2. A coil spring 6 attached so as to surround the chamber 2 is held between an upper spring receiver 7 and a lower spring receiver 8 in a charged state, and the upper spring receiver 7 is attached to an upper side surface of the chamber 2. The lower spring receiver 8 is fixed to the lower mounting portion 5 and abuts and is fixed to the lower surface of the cylinder tube 1a. The difference from the device shown in FIG. 4 is that the upper spring receiver 7 is welded and fixed to the chamber 2.
The upper mounting part 4 and the lower mounting part 5 are hinges. The air suspension device for adjusting the vehicle height according to this embodiment can also reduce the diameter of the coil spring 6 and ensure a large diameter of the coil spring 6, so that it has the same operational effects as the device of FIG.

In the present invention, the upper part of the piston rod 1c is made to pass through the center of the upper end of the chamber 2, and the upper mounting part 4 is provided integrally with the piston rod 1c. A sealing device may be provided. In this case, in order to make the diameter of the chamber 2 the same as in the illustrated embodiment, only the upper end of the chamber 2 where the shaft sealing device is provided is enlarged. The present invention relates to an upper mounting portion 4.
Are connected to an upper connection portion A which is an air suspension connection portion provided on the chassis, and the lower mounting portion 5 is connected to a lower connection portion B which is an air suspension connection portion provided on a bearing member for receiving an axle. The configuration of the upper mounting portion 4 and the lower mounting portion 5 is not particularly limited.

[0019]

According to the air suspension device for adjusting the vehicle height of the present invention, the load on the air suspension can be reduced by mounting a coil spring that partially bears the load, and the diaphragm can be prevented from being damaged when traveling on rough roads. It is possible to provide an air suspension device for adjusting the vehicle height, and in particular, since the length of the coil spring can be secured larger than before and the spring constant can be made smaller than before, the stroke length of the shock absorber can be reduced. Even if it is large, the suitable range of the biasing force of the coil spring can be widened, so that the driver wants to drive or park with the vehicle height higher than the standard, and wants to drive or park with the vehicle height lower than the standard. Any of the demands can be met, and the diameter of the coil spring can be made smaller than before so that the mounting space can be reduced.

[Brief description of the drawings]

FIG. 1 shows a vehicle height adjusting air suspension device according to a first embodiment of the first invention of the present application, in which (a) is a longitudinal sectional front view when the vehicle height is minimized, and (b) is a front view. It is a vertical front view at the time of making vehicle height the highest.

FIG. 2 relates to the first embodiment of the first invention of the present application,
It is a vertical front view of the air suspension apparatus for vehicle height adjustment when a vehicle height is made into a standard.

FIG. 3 relates to the first embodiment of the second invention of the present application,
It is a vertical front view of the air suspension apparatus for vehicle height adjustment when a vehicle height is made lower than a standard.

FIG. 4 relates to a second embodiment of the second invention of the present application,
It is a vertical front view of the air suspension apparatus for vehicle height adjustment when a vehicle height is made lower than a standard.

[Explanation of symbols]

 1 Shock absorber 1a Cylinder cylinder 1b Piston rod 1b Piston 2 Chamber 3 Diaphragm 3a Small-diameter cylindrical part 3b ..Large-diameter cylindrical part 4... Upper mounting part 5... Lower mounting part 6... Coil spring 7... Upper spring receiver 7a. Lower spring receiver 9 ··· Bracket 10 ··· High pressure air passage 11 ··· High pressure air supply path 12 ··· Tightening ring 13 ··· Tightening ring 14 ··· bracket

Claims (2)

[Claims] 1. A shock absorber, a small-diameter cylindrical chamber accommodating the shock absorber from a lower end opening, and a space surrounding the shock absorber being a small space having a diaphragm accommodating portion, and an upper end of the small-diameter cylindrical portion. The upper end of the large-diameter cylinder outside the small-diameter cylinder is fixedly fitted to the lower part of the chamber while being fixed to the upper part of the cylinder cylinder of the shock absorber. The lower end has a rubber diaphragm that shifts to the lower end of the large-diameter cylindrical portion, and has a lower mounting portion integrally with the lower end of the cylinder cylinder, and an upper mounting portion at the upper end of the chamber or the upper end of a piston rod that passes through the chamber. Height adjusting air suspension device, wherein an upper coil spring is attached to surround a chamber. And the lower spring receiver is sandwiched in an accumulating state, the upper spring receiver is engaged and supported by an upper mounting portion,
The lower spring receiver is supported by a bracket engaged and supported by the lower mounting portion at a position substantially corresponding to the large-diameter cylindrical portion of the diaphragm when the cylinder cylinder is most retracted into the chamber, L provided on the upper side of the chamber
The high-pressure air passage of the mold is provided with its opening facing upward, and the high-pressure air supply passage can be passed through the small hole opened in the upper spring receiver, passed through the inside of the coil spring, and connected to the high-pressure air passage. An air suspension device for adjusting a vehicle height, wherein the air suspension device is configured as follows. 2. A shock absorber, a small-diameter cylindrical chamber accommodating the shock absorber from a lower end opening, and a space surrounding the shock absorber being a small space having a diaphragm accommodating portion, and an upper end of the small-diameter cylindrical portion. The upper end of the large-diameter cylinder outside the small-diameter cylinder is fixedly fitted to the lower part of the chamber while being fixed to the upper part of the cylinder cylinder of the shock absorber. The lower end has a flexible diaphragm that shifts to the lower end of the large-diameter cylindrical portion. The lower end of the cylinder has an integral lower mounting portion, and the upper end of the chamber or the upper end of the piston rod that passes through the chamber. What is claimed is: 1. An air suspension apparatus for adjusting a vehicle height, comprising an integral mounting portion, wherein a coil spring attached so as to surround a chamber is provided with an upper spring. The upper spring support is sandwiched between the spring receiver and the lower spring receiver in an accumulating state, and the upper spring receiver is positioned and fixed slightly below the high-pressure air inlet provided on the upper side surface of the chamber. An air suspension device for adjusting a vehicle height, wherein the air suspension device is fitted to the lower mounting portion and abuts and is fixed to a lower surface of a cylinder cylinder.