JPS5832968Y2 - Automotive rear wheel suspension system - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an automobile rear wheel suspension system, particularly an independent suspension system.

Conventionally, as shown in FIG. 1, the wheel support 2 of the rear wheel 1 is
When supporting from the vehicle body 5 by a transverse arm 3 having a bifurcated tip and a longitudinal arm 4, the mounting portions 3a and 4a of each arm 3, 4 are provided, for example, in accordance with Japanese Patent Laid-Open No. 49-2692.
As disclosed in Publication No. 1 (title of the invention: ``Automobile Rear Wheel Support Device''), it is elastically supported by rubber bushings or the like.

For this reason, during cornering, the ground contact load of the rear wheels located outside the turning radius increases, resulting in elastic deformation of each rubber bushing, etc., causing the rear wheels to exhibit toe-out and tend to oversteer. The disadvantage is that it impairs running stability.

This problem also occurs when the vehicle is hit by a crosswind while driving east.

This invention was made to eliminate the above-mentioned drawbacks of the conventional technology, and improves driving stability by preventing oversteering from occurring immediately without a time lag when cornering force or crosswind is applied. The present invention provides a rear wheel suspension system devised to improve the performance of the vehicle.

Hereinafter, embodiments of this situation will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 2 and 3, the wheel support 11 that rotatably supports the rear wheel 10 has its front and rear parts aligned as shown in FIG. are connected in the vehicle body width direction by two transverse arms 13 and 14 at angles α and β larger than the right angle when viewed from the plane, and the other ends of these two transverse arms 13 and 14 are connected to the vehicle body 12. ing.

On the other hand, the front part of the wheel support 11 and the vehicle body 12 are connected almost straight in the longitudinal direction of the vehicle body by a longitudinal arm 15.

The wheel support 11 constitutes a lower part of a strut 16, and a shock absorber 17, a coil spring 18, and a stopper 19 are fitted to the upper part of the strut 16, and the wheel support 11 is attached to the vehicle body 12 via a rubber mount 20. ing.

Vehicle body 12 and wheel support 11 of the longitudinal arm 15
The attachment part 15a (AL 15b(B) is 5K as shown in FIG. 23 and is attached to a platen (24, 24) fixed to the vehicle body 12 and wheel support 11.

Attachment portion 13 a (CL 13 b (E;) of the transverse arms 13, 14 to the vehicle body 12 and wheel support 11
.

14 aO), 14 b (F) is the mounting part 13b,
14b has almost the same mounting structure as the vertical arm 15 described above, and the mounting parts 13a and 14aK are equipped with rubber bushings that fit into retainers 921 fixed to the ends of the horizontal arms 13 and 14, as shown in FIG. 22 core tube 22a
A long bolt 25 is inserted through the wheel support 11 to attach it to the wheel support 11.

The longitudinal arm 15 thus connects the rear wheel 100 to the wheel support 1
1 and the vehicle body 12, the transverse arms 13 and 14 are connected to the wheel support 11 of the rear wheel 10, while being connected to be able to swing up and down and to be elastically movable in the longitudinal direction. It is connected to the vehicle body 12 so that it can swing up and down and back and forth.

Regarding the above arrangement structure of the transverse arms 13 and 140, the mounting interval t2 of the transverse arms 13 and 14 to the vehicle body 12 is set larger than the mounting interval t1 of the transverse arms 13 and 14 to the wheel support 11, so that the transverse arms 13 and 14 are mounted laterally with respect to the vehicle body 12. The directional arms 13, 14 are arranged approximately trapezoidally and the angle α between the wheel support 11 and the front transverse arm 13 is greater than the angle β between the rear transverse arm 14.

If the lateral arms 13 and 14 are arranged as described above, cornering force and lateral force will act on the rear wheels 10 when cornering or when a crosswind is encountered while driving.

In this case, since the inclination angle α of the front transverse arm 13 is larger than the inclination angle β of the rear transverse arm 14, the sixth
As shown in the figure, the wheel support 11 moves rearward due to the component of the lateral force acting on the mounting portions C and D.

This is because the rotational moment of the front transverse arm 130 due to lateral forces is greater than the rotational moment of the rear transverse arm 14.

When the wheel support 11 moves rearward, the front transverse arm 13 moves around the attachment point E, and the rear transverse arm 1
4 swings around the mounting part F as shown by the two-dot chain line in the figure, and as a result, the mounting part C moves inward from the mounting part.
This will prevent the rear wheel 10 from toe-out.

Also, if you want the rear wheel 10 to be toe-in,
This tendency should be increased.

As is clear from the above explanation, this invention was designed to make the angle between the wheel support and the front arm larger than that of the rear arm for the two transverse arms that connect the rear wheel support and the vehicle body. This setting prevents the rear wheels from toe-out due to the rocking action of each lateral arm when cornering or when a crosswind is encountered while driving.
It is also possible to give toe-in to the rear wheels.

Therefore, when a cornering force or a lateral force is applied, a corrective action can be performed immediately, thereby improving driving stability.

[Brief explanation of drawings]

Fig. 1 is a plan view of a conventional rear wheel suspension system, Fig. 2 is a plan view of a rear wheel suspension system according to this invention, Fig. 3 is a front view of Fig. 2, and Figs. 4 and 5 are each FIG. 6 is a cross-sectional view showing the arm mounting structure, and is an explanatory diagram schematically illustrating the arrangement structure of the lateral arms. 10...Rear wheel, 11...Wheel support,
12...Vehicle body, α, β...Inclination angle, 1
3, 14... Lateral arm i 5------
- longitudinal arms, 13a, 13b; 14a, 14b, 15a, 15b ---
Mounting part.

Claims (1)

[Scope of utility model registration request] Two lateral arms that can swing up and down and back and forth connect the front and rear parts of a wheel support that rotatably supports a rear wheel and the vehicle body, respectively, in the width direction of the vehicle body, and the wheel support and the vehicle body. and a vertical connection member that is elastically movable slightly in the longitudinal direction, and the angle formed by the wheel support and the front transverse arm, when viewed from the plane, is changed from a right angle between the wheel support and the rear transverse arm. A rear wheel suspension system for an automobile, characterized in that the angle is set larger than the angle formed by the directional arm.