JPH0545274U - Air suspension device - Google Patents

Abstract

(57) [Summary] [Purpose] To connect an air suspension device to a vehicle body without making a hole in its air chamber. [Structure] A canister 14 connected to a vehicle body side and a piston 23 connected to a wheel side are airtightly connected by a rubber tube 21 to form an air chamber 28. A hydraulic shock absorber 29 is hermetically inserted into the air chamber 28 from the piston 23 side,
The body 30 of 29 is connected to the piston 23 and the rod 18 is connected to the canister 14. The canister 14 has a curved portion 20 in the middle.
Is provided and serves as a mounting portion for the rubber tube 21, and the curved portion 20
A hole 17 into which a screw 16 for connecting to the vehicle body side is inserted is provided on the outer peripheral side of the. Since the hole 17 is provided on the outer peripheral side of the curved portion 20 and does not face the air chamber 28, air leakage does not occur.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air suspension device provided between a vehicle body side and a vehicle side of a vehicle such as an automobile.

[0002]

[Prior Art]

 For example, as shown in FIG. 2, in a conventional air suspension device 1, a canister 3 connected to a vehicle body 2 and a piston 4 connected to a wheel (not shown) side are airtightly connected by a rubber tube 5. The air chamber 6 is configured. A hydraulic shock absorber 7 is inserted from the piston 4 side into the air chamber 6, and a main body 7a of the hydraulic shock absorber 7 is airtightly fixed to the piston 4. The rod 8 protruding from the hydraulic shock absorber 7 penetrates the canister 3 and its tip end is connected to the vehicle body 2 via a rubber bush 9. Between the rod 8 and the canister 3, there are provided a guide member 10 into which the rod 8 is hermetically inserted and a rubber tube 11 which hermetically connects the guide member 10 and the canister 3. The air chamber 6 is filled with compressed air. In the figure, 12 is an O-ring that seals between the rod 8 and the guide member 10.

The air suspension device 1 is connected to the vehicle body 2 by inserting a screw 13 into a hole 3A provided at an upper portion of the canister 3 and welding and fixing it so that internal air does not leak. The side connecting part was configured and connected.

With this configuration, the load applied to the wheel side is transmitted to the vehicle body 2 via the compressed air in the air chamber 6 and is transmitted to the vehicle body 2 via the hydraulic shock absorber 7. The small vibration generated on the wheel side is transmitted to the piston 4 and the hydraulic shock absorber 7, but the vibration transmitted to the piston 4 is absorbed by the compressed air in the air chamber 6 and the rubber tube 5. Therefore, it cannot be transmitted to the canister 3 side. Further, the vibration transmitted to the hydraulic shock absorber 7 is absorbed by the rubber bush 9 and is not transmitted to the vehicle body 2. Here, since the rubber bush 9 receives the damping force of the hydraulic shock absorber 7 and does not directly receive the load on the wheel side, it is possible to use a soft material, so that it is possible to effectively absorb small vibrations. . In this way, the small vibration generated on the wheel side is not transmitted to the vehicle body 2 side, so that the riding comfort is improved.

[0005]

[Problems to be solved by the device]

 However, the conventional example shown in FIG. 2 has the following problems. That is, the canister 3 is provided with the hole 3A for connection to the vehicle body side, and when the screw 13 is fixed to the hole 3A, the hole 3A may not be completely closed and air leakage may occur. there were. Further, in the case where the screw 14 is adhered and fixed to the upper part of the canister without forming the hole 3A in the canister 3 by welding or the like, there is a problem that the strength for supporting the load on the wheel side is insufficient.

An object of the present invention is to provide an air suspension device that solves the above problems.

[0007]

[Means for Solving the Problems]

 In the air suspension device of the present invention, a canister connected to the vehicle body side and a piston connected to the wheel side are airtightly connected by a rubber tube to form an air chamber, and a hydraulic pressure is applied to the air chamber from the piston side. In an air suspension device in which a shock absorber main body is airtightly inserted and connected, and a rod protruding from the hydraulic shock absorber main body is connected to the canister side, the canister is provided on an inner peripheral side and connects the rod. A rod connecting portion, a vehicle body side connecting portion that is provided on the outer peripheral side and is connected to the vehicle body side, and the rubber tube that is provided so as to project in the piston direction between the rod connecting portion and the vehicle body side connecting portion. It is characterized in that the rubber tube mounting portion for mounting is constituted by one member.

[0008]

[Action]

 With this configuration, since the vehicle body side connecting portion is provided on the outer peripheral side of the rubber tube mounting portion of the canister, the vehicle body side connecting portion does not face the air chamber. Therefore, it is possible to connect to the vehicle body side without making a hole in the air chamber.

[0009]

【Example】

 An embodiment of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, a flange portion 15 serving as a vehicle body side connecting portion is formed on the outer peripheral side of the canister 14, and a screw 16 for connecting to a vehicle body (not shown) is inserted into the flange portion 15. A hole 17 is provided. Further, on the inner peripheral side of the canister 14, there is provided a through hole 19 serving as a rod connecting portion into which a rod 18 described later is inserted and connected. A space between the flange portion 15 of the canister 14 and the through hole 19 is curved so as to project downward, and one end side of a cylindrical rubber tube 21 is fitted into the curved portion 20 so that the caulking ring It is fixed by 22. One end of a cylindrical piston 23 is fitted to the other end of the rubber tube 21 that has been folded back, and is fixed by a caulking ring 24. Further, a tubular projection 25 is formed between the hole 17 of the canister 14 and the curved portion 20, and a cap 26 is attached to an end of the tubular projection 25. A communication hole 27 is provided inside the protrusion 25 of the canister 14, and thus the canister 14, the cap 26, the rubber tube 21 and the piston 23 form an air chamber 28.

A hydraulic shock absorber 29 is inserted into the air chamber 28 from an opening of the piston 23, and a main body 30 of the hydraulic shock absorber 29 is airtightly fixed to the piston 23. The protruding rod 18 is inserted into the through hole 19 through the rubber bush 32 and the washer 33, and is connected to the canister 14 by screwing a nut 34 at the tip thereof. The compressed air is enclosed in the air chamber 28.

In the figure, 35 and 36 are O-rings for sealing between the canister 14 and the cap 26, and 37 is a mounting portion for connecting the hydraulic shock absorber 29 to the wheel side.

According to the configuration of the above-described embodiment, since the hole 17 provided in the canister 14 for mounting the air suspension device on the vehicle body is provided outside the air chamber 28, the hole can be formed in the air chamber 28. It can be attached to the vehicle body without. Therefore, problems such as air leakage do not occur. Furthermore, in this configuration, it is not necessary to fix the screw 16 to the canister 14, and since it is provided outside the air chamber 28, the screw 16 can be easily replaced.

Further, in the present embodiment, since it is not necessary to fix other members to the canister 14 by welding or the like, the canister 14 can be made of a non-metal such as resin.

Next, the operation of the present embodiment configured as described above will be described. The displacement of the wheel causes the hydraulic shock absorber 29 to expand and contract, and as the hydraulic shock absorber 29 expands and contracts, the piston 23 bends and displaces the rubber tube 21 and changes the volume of the air chamber 28. The change acts as an elastic force between the wheel side and the vehicle body side. Moreover, the damping force generated by the expansion and contraction of the hydraulic shock absorber 29 acts between the wheel side and the vehicle body side.

The fine vibration generated on the wheel side is transmitted to the hydraulic shock absorber 29 and the piston 23 via the mounting portion 37. The vibration transmitted to the piston 23 is absorbed by the compressed air in the air chamber 28 and the rubber tube 21 and is not transmitted to the canister 14. On the other hand, the vibration transmitted to the hydraulic shock absorber 29 is absorbed by the rubber bush 32 and is not transmitted to the canister 14. Here, since the rubber bush 32 receives the damping force of the hydraulic shock absorber 29 and does not directly receive the load on the wheel side, it is possible to use a soft material, so that it is possible to effectively absorb small vibrations. . In this way, small vibrations on the wheel side are not transmitted to the canister 14 on the vehicle body side, so that the riding comfort is improved.

Further, in this embodiment, the rod 18 of the hydraulic shock absorber 29 is connected to the canister 14, and the connecting portion between the rod 18 and the canister 14 is inside the air chamber 28. Even if the rubber bush 32 bends and the rod 18 moves due to the load applied to 29, it does not affect the sealed portion of the air chamber 28.

[0017]

[Effect of the device]

 As described above in detail, according to the air suspension device of the present invention, since the vehicle body side connecting portion is provided on the outer peripheral side of the rubber tube mounting portion of the canister, the vehicle body side connecting portion may face the air chamber. Absent. Therefore, since it can be connected to the vehicle body side without making a hole in the air chamber, there is an excellent effect that air leakage does not occur.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment of the present invention.

FIG. 2 is a vertical sectional view of a conventional air suspension device.

[Explanation of symbols]

 14 Canister 15 Flange (Vehicle side connection) 18 Rod 19 Through hole (Rod connection) 20 Curved part (Rubber tube mounting part) 21 Rubber tube 23 Piston 28 Air chamber 29 Hydraulic shock absorber 30 Body

Claims (1)

[Scope of utility model registration request] 1. A canister connected to the vehicle body side and a piston connected to the wheel side are airtightly connected by a rubber tube to form an air chamber, and a hydraulic shock absorber main body is formed in the air chamber from the piston side. In an air suspension device that is airtightly inserted and connected, and a rod protruding from the hydraulic shock absorber main body is connected to the canister side, the canister is provided on an inner peripheral side, and a rod connecting portion that connects the rods. And a vehicle body side connecting portion provided on the outer peripheral side and connected to the vehicle body side, and a rubber tube for mounting the rubber tube provided so as to project in the piston direction between the rod connecting portion and the vehicle body side connecting portion. An air suspension device, wherein the mounting portion and the mounting portion are formed of one member.