JP2001001731A - Vehicle suspension - Google Patents

Abstract

(57) [Summary] [Problem] To provide a suspension system for a vehicle that can sufficiently use the performance of a shock absorber and can use an inexpensive and lightweight shock absorber. SOLUTION: A main hanger 2 fixed to a frame 1 of a vehicle body, a leaf spring 4 having one end pivotally attached to the main hanger 2 and an axle 3 attached to an intermediate part, and the other end of the leaf spring 4 and the frame 1 are provided. , An air spring upper bracket 11 mounted on the upper surface of the air spring 6, a shock absorber upper bracket 13 projecting from the air spring upper bracket 11, and a shock absorber upper bracket 13. And a shock absorber 16 attached to the axle 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle suspension system used for a trailer or the like.

[0002]

2. Description of the Related Art FIG. 3 is a side view showing an example of a conventional vehicle suspension system used for a trailer or the like. A frame 1 attached to a lower side of a vehicle body faces downward. A main hanger 2 is fixed, and a front end of a leaf spring 4 to which an axle 3 is attached at an intermediate portion is pivotally connected to the main hanger 2 by bolts 5. Further, an air spring 6 is mounted between the frame 1 and the rear end of the leaf spring 4 via an air spring upper bracket 7 and an air spring lower bracket 8, and a shock absorber 9 for damping vibration is connected to the axle 3. It is arranged over the frame 1.

Due to the structural limitation of the suspension system of the trailer, an air spring 6 is disposed behind the axle 3 as shown in FIG. Behind 4,
Since the air spring 6 and the brake chamber (not shown) and its peripheral devices are mounted, the shock absorber 9 is generally arranged in front of the leaf spring 4 in general.

Therefore, the lower end of the shock absorber 9 is pivotally attached to the axle seat 10 integral with the axle 3, and the upper end of the shock absorber 9 is pivotally attached to the main hanger 2 integral with the frame 1. 3
They are often mounted diagonally, as shown in the figure.

[0005]

However, in a vehicle suspension system in which the shock absorber 9 is mounted obliquely, when the frame 1 and the axle 3 are relatively displaced in the vertical direction, the displacement of the shock absorber 9 is reduced. As a result, the effect of the damping force is reduced, and as a result, a problem of insufficient damping of the suspension device occurs.

However, if a shock absorber upper bracket for pivotally mounting the upper end of the shock absorber 9 is mounted on the upper portion of the frame 1 so as to be located above the axle 3, the mounting distance between both ends of the shock absorber is too large. It is not possible to attach the shock absorber upper bracket directly.

Therefore, as a countermeasure, generally, the damping force of the shock absorber is extremely increased.
There was a disadvantage that an expensive and heavy shock absorber had to be used.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a suspension system for a vehicle which eliminates the above-mentioned drawbacks, can fully utilize the performance of a shock absorber, and can use an inexpensive and lightweight shock absorber. It is assumed that.

[0009]

According to the first aspect of the present invention, there is provided a main hanger fixed to a frame of a vehicle body, a leaf spring having one end pivotally attached to the main hanger and an axle mounted at an intermediate portion, and An air spring mounted between the other end of the spring and the frame, an air spring upper bracket mounted on an upper surface of the air spring, a shock absorber upper bracket projecting from the air spring upper bracket, A suspension system for a vehicle, comprising: a shock absorber upper bracket and a shock absorber mounted over the axle, wherein the air spring upper bracket mounted on the upper surface of the air spring has a shock absorber upper part. By projecting the bracket, the shock absorber Becomes the over bar can be attached in nearly vertical position behind the axle, it is possible to effectively utilize the performance of the shock absorber.

According to a second aspect of the present invention, in the vehicle according to the first aspect, a vertical surface is provided on the upper bracket of the shock absorber, and the vertical surface is used as a positioning surface of a cross member that connects the left and right frames. This is a suspension system, and when mounting a cross member that connects the left and right frames, the upper bracket of the shock absorber can be used as a positioning surface, so that the performance of the shock absorber can be used effectively and the work of mounting the cross member The nature also improves.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side view showing an example of a vehicle suspension system according to an embodiment of the present invention. A main hanger 2 is fixed downward to a frame 1 attached to a lower side of the vehicle body. The front end of a leaf spring 4 having an axle 3 attached to an intermediate portion is pivotally attached to the main hanger 2 by a bolt 5.

An air spring 6 is provided between the rear end of the leaf spring 4 and the frame 1, and an air spring lower bracket 8 attached to a lower portion of the air spring 6 is provided at the rear end of the leaf spring 4. It is bolted on.

The upper part of the air spring 6 is shown in FIG.
An air spring upper bracket 11 shown in a perspective view of FIG. A plurality of bolt insertion holes 12 are formed in the air spring upper bracket 11, and a shock absorber upper bracket 1 is provided at a position off the center of the upper surface of the air spring upper bracket 11.
3 are protruded.

Shock absorber upper bracket 13
Is formed in a substantially inverted L-shape, the rear side of the upper part of the shock absorber upper bracket 13 is a vertical plane 14, and the front side of the upper part of the shock absorber upper bracket 13 is the air spring upper bracket 11. A shock absorber fastening hole 15 is formed at a tip end portion of the shock absorber 15 in a lateral direction.

The air spring upper bracket 11 attached to the upper part of the air spring 6 is bolted to the lower surface of the frame 1 as shown in FIG. The shock absorber fastening hole 15 (see FIG. 2) has a shock absorber 1 as shown in FIG.
The upper end of 6 is bolted. The lower end of the shock absorber 16 is attached to the lower part of the shock absorber
7 is bolted. As a result, the shock absorber 16 can move the axle 3 without interfering with the air spring 6 and the brake chamber (not shown) and its peripheral devices.
It is possible to mount the unit almost vertically in the immediate rear. In the case of a trailer or the like, the air spring 6 has a large load sharing, so that the left and right frames 1 are generally connected by a cross member 18 so as to be strong.
When both ends of the cross member 18 are fixed to the left and right frames 1, the vertical surface 14 on the rear side of the vehicle on the upper bracket 13 of the shock absorber serves as a positioning surface for fixing the cross member 18. The cross member 1 is joined to the upper bracket 13 of the shock absorber to improve the cross member 1.
8 can also serve to support the upper end of the shock absorber 16.

[0017]

According to the first and second aspects of the present invention, the shock absorber can be mounted in a substantially vertical position behind the axle, and the performance of the shock absorber can be sufficiently exhibited. In addition, the shock absorber upper bracket and the shock absorber lower bracket can be made lightweight to reduce the cost.

According to the second aspect of the present invention, the workability of mounting the cross member is further improved, and the cross member also serves to support the upper end of the shock absorber.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an embodiment of a vehicle suspension device of the present invention.

FIG. 2 is a perspective view of a main part of an example of the embodiment of the present invention.

FIG. 3 is a side view showing an example of a conventional vehicle suspension system.

[Explanation of symbols]

 1 Frame 2 Main Hanger 3 Axle 4 Leaf Spring 6 Air Spring 11 Air Spring Upper Bracket 13 Shock Absorber Upper Bracket 14 Vertical Surface 16 Shock Absorber 18 Cross Member

Claims (2)

[Claims] 1. A main hanger fixed to a frame of a vehicle body, a leaf spring having one end pivotally connected to the main hanger and an axle attached to an intermediate portion, and a leaf spring between the other end of the leaf spring and the frame. An air spring mounted, an air spring upper bracket mounted on the upper surface of the air spring, a shock absorber upper bracket protruding from the air spring upper bracket, and the shock absorber upper bracket and the axle. With the installed shock absorber,
A suspension system for a vehicle, comprising: 2. The shock absorber upper bracket according to claim 1, wherein a vertical surface is provided, and the vertical surface serves as a positioning surface of a cross member connecting the left and right frames.
A suspension system for a vehicle according to claim 1.