JPS62247914A - Rear wheel suspension device for automobile - Google Patents

Abstract

PURPOSE:To obtain a toe-out characteristic of rear wheels which attains a rapid turn ability while a stability is held in a high speed range, by laying lateral rods in front and rear of a rear wheel axle, and by making the operating characteristics of bushings fitted to both lateral rods, different from each other. CONSTITUTION:A rear wheel axle is attached to the rear ends of right and left arms 3 adapted to be journalled to a vehicle body, and is also supported by struts 4. There are provided lateral rods 5, 6 which are attached, at their one end 5a, 6b, to the axle 1 and at the other end 5a, 6a to the vehicle body. A bushing which acts when a load higher than a predetermined value is applied, is fitted to the attaching section of the lateral rod 5, and a bushing which does not act when a load higher than the predetermined value is applied, is fitted to the attaching section of the lateral rod 6. With this arrangement, when a lateral load which is lower than a predetermined value is applied to the rear wheels, the bushing on the lateral rod 6 changes greatly so that a toe-out characteristic may be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a rear wheel suspension system for an automobile, and is designed to achieve both flexibility at low speeds and stability at high speeds.

(Prior art) Automobiles have wheels that control the movement of their wheels in the left and right direction.
Some have a lateral rod installed between the axle and the frame. In this case, in order to emphasize stability in the high-speed range, a lateral rod is placed behind the axle, and the rear wheels are set to toe-in in response to lateral forces.

(Problems to be Solved by the Invention) As mentioned above, when the lateral rod is placed behind the axle, stability at high speeds can be obtained, but agile turning performance (
There was a problem in that it was difficult to obtain steering characteristics.The present invention solves this problem.

(Means for Solving the Problems) As a means for solving the above-mentioned problems, the present invention provides separate lateral rods at the front and rear of the rear wheel axle, and a bushing provided on each of the two lateral rods. The operating characteristics have been changed.

(Function) With such a configuration, it is possible to obtain rear wheel toe-out characteristics that realize agile turning performance while maintaining stability in a high-speed range.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. First, in FIG. 1, reference numeral 1 denotes a rear wheel axle (the left side in the figure is the front), and the rear wheels are attached to spindles 2 at both ends of the axle. This axle 1 is attached to the rear end of an arm 3 whose front end 3a is pivoted to the vehicle body (not shown), and to the lower end of a strut 4 whose upper end is supported by the vehicle body, and is centered around the front end shaft attachment portion of the arm 3. It swings in the vertical direction. Lateral rods 5.6 are arranged in front and behind the axle l,
Its proximal ends 5a, 6a are attached to the axle 1, and its distal end 5b
, 8b is attached to the vehicle body.

A bushing 7 that acts above a certain load is attached to the attachment portion of the lateral rod 5, and a bush 8 that does not act above a certain load is attached to the attachment portion of the lateral rod 6.

As shown in FIGS. 2 and 3, the bushing 7 has an outer cylinder 9.
A C-shaped rubber 10 is adhered to the inside of the cylinder, a shaft 11 is provided in the center, and a stopper 13 made of a hard material is provided in the gap 12 of the outer cylinder 9. Stopper X3 is rubber 1
Precompress 0. The bushing 8 has a rubber 15 having a notch 15a attached to the inside of an outer cylinder 14, and an inner circumference of the rubber 15 attached to a tube body 16. A protrusion 17 that is integral with the outer cylinder 14 is provided inside the notch 15a with a gap between it and the rubber 15.

This device configured in this way is installed when the car is in front (6th position).
When traveling toward the upper part of the figure), when no lateral load greater than the load applied to the rear wheel 18 is applied to one of the rear wheels 18, 19, for example, the rear wheel 19, the lateral rod 5.6
Because of the structure described above, the lateral rods 5 and 6 have the characteristics shown in Fig. 7 as ■ and (Φ). [Phase]) If there is a lateral load less than the load f at the intersection of the curves, the lateral rod 6
The displacement of the side bushing 8 is large, and the suspension is
As shown in the figure, it becomes a toe-out characteristic. Also, the load is f
With the above lateral load, the displacement of the bushing 7 on the side of the lateral rod 5 becomes large, and the suspension exhibits toe-in characteristics as shown in FIG. 9.

(Effects of the Invention) Since the present invention has the configuration and operation as described above, it has the following effects.

■ Balances turning performance at low speeds and stability at high speeds.

・■ Characteristics similar to four-wheel steering can be obtained without any special equipment.

■ Since there are two lateral rods, the load sharing per rod is reduced.

■ Does not require large space.

Class C: Applicable to various suspensions with lateral rods.

[Brief explanation of drawings]

FIG. 1 is a perspective view of one embodiment of the present invention, FIG. 2 and FIG.
The figure is a plan view of the bush, Figure 3 is a sectional view taken along line m-■ in Figure 2, Figure 5 is a sectional view taken along line v-■ in Figure 4, Figure 6 is a skeleton diagram of Figure 1, and Figure 7 is a cross-sectional view taken along line V-■ in Figure 4. The bush characteristic diagrams, FIGS. 8 and 9 are skeleton diagrams explaining the operation. l... City axis 5, 6... Lateral rod 7
．． 8... Bushu Patent Applicant Suzuki Motor Co., Ltd. (and 1 other person) 1st - 3c 1 @ Axis 5.6 / Edge Full Lot 7.8 = 2 Nitsu Figure 2 Figure 4 pm )-V Figure 3
Figure 5 Figure 6 Figure 7 ■

Claims (1)

[Claims] (1) Separate lateral rods are placed before and behind the rear wheel axle,
A rear wheel suspension system for an automobile, characterized in that the operating characteristics of bushes provided on each of the two lateral rods are changed.