JPH01103505A - Rear-wheel suspension system for automobile - Google Patents

Abstract

PURPOSE:To keep off any damage to a buffer means at driving on an uneven ground by rotatably supporting the base end of the swing arm at the car body, and installing a buffer means between the rear side of the base end and the car body. CONSTITUTION:A rear suspension 14 is constituted of upper and lower swing arms 16, 17 set up in the longitudinal direction, and a shock absorber 18 installed in the inner part of a chassis frame 2 as a body structure. These upper and lower swing arms 16, 17 support rear wheels 19 with each of their tip parts, and a base end is pivotally supported rotatably in an opening hole 13. For this reason, load reception and rolling prevention are made possible by these swing arms 16, 17. With this constitution, since a rocker shaft 15 of the swing arm and a mounting part of the shock absorber 18 are all installed in the body structure, protection for the suspension is well promoted, and any damage to the shock absorber 19 at driving on an uneven ground is preventable in this way.

Description

[Detailed description of the invention] a. Industrial application field The present invention relates to a rear wheel suspension system for an automobile.

b. Prior Art There are many types of suspensions that support the rear wheels of automobiles, depending on their drive systems, presence or absence of rear wheels, vehicle weight, etc.

For four-wheel drive vehicles, a four-wheel independent suspension is optimal for driving on rough terrain, and a swing arm suspension suspension is known as a suspension for this purpose.

Swing arm type suspension systems generally have only a fixed differential gear installed in the center of the axle, and the left and right axles are connected by a joint, and are mainly divided into semi-trailing arm type and full trailing arm type.

These semi-trailing arm type and full trailing arm type suspensions are divided depending on whether or not the swing axis is tilted, and in both cases, the axle is supported at the tip of the swing arm, and the base end is supported on the vehicle body. The coil spring and shock absorber that receive the load support the swing arm midway.

Problems to be solved by the C0 invention These conventional swing type suspensions have the following problems:
Since the shock absorbing means such as a coil spring is designed to support the swing arm in the middle, the load points are divided between the swing arm swing axis and the attachment point of the shock absorbing means, and the load points on the vehicle body are dispersed. Therefore, in order to reinforce the car body over a wide range of areas, the car body becomes thicker, leading to an increase in load. Furthermore, since the buffer means is located at the tip of the swing arm, it is easily damaged when traveling on rough terrain, making it unsuitable.

d. Means for Solving the Problems In order to solve the above problems, the present invention provides a rear wheel suspension system for an automobile equipped with an independent swing type suspension disposed in the longitudinal direction. The base end of the swing arm supporting the swing arm is pivotally supported on the vehicle body structure, and a buffer means for receiving a load is provided between the base end of the swing arm and the vehicle body structure.

e. Example Hereinafter, an example of the present invention applied to an off-road type vehicle will be described in detail with reference to the drawings.

In Figure 1, 1 is the car body, which is the second
As shown in the figure, brackets 3.4 are provided at the front and rear of the chassis frame 2 as a vehicle body structure.
A hood 5 and a trunk lid are attached to 4, and a door 8 is attached to side opening 7. The chassis frame 2 is formed by integrally molding a side sill 9, a front pillar 10, a rear villa 11, and a roof panel 12, and the side sill 9, front pillar 10, and roof panel 12 are molded so as to be used as surface materials as they are. .

Opening holes 13 are formed on the rear side of both side sills 9 of the chassis frame 2, and a swing shaft 15 of a rear suspension 14 is provided inside the opening holes 13.

The rear suspension 14 is composed of upper and lower swing arms 16 and 17 of a swing arm type arranged in the front-rear direction, and a shock absorber 18 consisting of a coil spring 18a and a shock absorber 18b provided inside the chassis frame 2. There is.

The upper and lower swing arms 16 and 17 each support a rear wheel 19 at their respective tips, and their base ends are rotatably supported in the opening hole 13 directly or via a bracket. A triangular bracket 20 is provided at the tip of the other end of the upper swing arm 16 by screwing or the like, and an L-shaped arm 21 is pivotally supported by this bracket 20.

The L-shaped arm 21 has one end 21a rotatably supported by the chassis frame 2 of the vehicle body 1, and the other end supported by the shock absorber 1.
8, and an eccentric cam 22 is built in the middle part. This eccentric cam 22 has a mounting hole 22a provided at an eccentric position of a column body, and this mounting hole 22a is pivotally supported by the bracket 20.

In this way, the upper swing arm 16 receives the load, and the lower swing arm 17 prevents lateral vibration.

f0 Effects of the Invention As described above, according to the rear wheel suspension system for an automobile according to the present invention, the swing axis of the swing arm where the load of the suspension is concentrated and the attachment part of the shock absorber are provided inside the vehicle body structure. This protects the suspension and prevents damage when driving on rough terrain.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a rear wheel suspension system for an automobile according to the present invention, and 2nd WJ is a perspective view showing a vehicle body structure.
Figure 3 is a rear perspective view showing the rear suspension mounting structure with the trunk lid removed, Figure 4 is a perspective view showing the rear suspension structure, and Figure 5 is an exploded perspective view showing the upper swing arm and L-shaped arm. It is. DESCRIPTION OF SYMBOLS 1... Vehicle body, 2... Chassis frame, 13... Opening hole, 14... Rear suspension, 15... Rocking shaft, 16... Upper swing arm, 17... Lower part Side swing arm, 18... shock absorber, 19... rear wheel. Figure 4, 1 r

Claims (1)

[Claims] (1) In a rear wheel suspension system for an automobile equipped with an independent swing-type suspension arranged in the longitudinal direction, the base end of the swing arm, which supports the rear wheel at the tip, is pivotally supported on the vehicle body structure, and A rear wheel suspension system for an automobile, characterized in that a shock absorbing means for receiving a load is provided on the rear side of a base end of a swing arm between the vehicle body structure and the rear end of the swing arm.