JPS5855921B2 - automotive independent suspension system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an independent suspension system for an automobile that suspends a vehicle body without connecting left and right axles.

Independent suspension systems that have been widely used in the past include the double wishibone type, which connects the axle and the vehicle body with two control arms that extend horizontally, and the two control arms that extend horizontally between the axle and the vehicle body. There is a strand type which is connected by an arm and a shock absorber is connected to this control arm or axle.The former has flexibility in the arrangement of kingpins, caster shafts, etc., and geometry against camber changes, trend changes, anti-dive, etc. The latter has the advantage of having a large degree of freedom, while the latter has fewer connection points to the vehicle body, so it has the advantage of being excellent in blocking vibrations from the road surface and being easy to assemble to the vehicle body. It is an object of the present invention to provide a simple and effective independent suspension system that combines the advantages of the above-mentioned image formats.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
FIG. 1 shows an application of the present invention to a front suspension system of an automobile, in which a pair of upper and lower support arms 2 and 3 are provided at the base end of an axle 10 that rotatably supports a wheel W, and a pair of upper and lower support arms 2 and 3 are provided between them. The located knuckle arm 4 is integrally connected,
The lower support arm 3 is connected via a ball joint 7 to the tip end of a first control arm whose base end is pivotally supported 5 to the vehicle body F so as to be vertically swingable, and the intermediate portion of the first control arm 6 is connected to the vehicle body F. A hydraulic shock absorber 8 extending vertically is interposed between the two.

At this time, the shock absorber 8 has a piston rod 9 connected to the vehicle body F via an elastic support member 11 made of rubber, and a lower portion of the cylinder 10 is connected to the first control arm 6 via a pivot 12. .

The base end of a second control arm 13 is pivotally supported 14 in the middle of the cylinder 10 so as to be able to swing up and down, and its tip is connected to the upper support arm 2 via a ball joint 15.

In the above, the pole joins 7.15 are arranged so as to cooperate to play the role of kingpin.

Furthermore, a radius ruffled 16 is connected to the lower end of the cylinder 10 for regulating the swinging of the wheel W in the front-rear direction, and a suspension coil spring 1 is connected between the cylinder 10 and the piston 19.
7 is reduced.

A tie rod 18 extending from the steering gap is connected to the knuckle arm 4, and rotation is given to the knuckle arm 4 by the movement of the tie rod 18 back and forth.
It is possible to turn the axle 1, and therefore the wheel W, about the pole join) 7.15.

Figure 4 shows the operating state of the device of the present invention using line sections.
When the wheel W receives an impact force from the road surface, each component moves between the solid line position and the chain line position while drawing a constant trajectory.

As is clear from the figure, upper and lower support arms 2.
3. Since the first and second control arms 6.13 and shock absorber 8 work together to form a four-bar link, the degree of freedom in the arrangement of king pins, caster shafts, etc., as well as camber changes, trend changes, It should be possible to obtain approximately the same degree of freedom in terms of geometry with respect to anti-dive, etc., as with the conventional double wishbone type.

In addition, the number of parts to be assembled to the vehicle body F is two, the shock absorber 8 and one control arm 6, similar to the conventional strand type, and there are fewer parts like the conventional strand type.
Therefore, it is not only easy to assemble it to the vehicle body F, but also has good isolation against vibrations from the wheels W.

In the above embodiment, if the knuckle arm 4 is removed, it can also be used as a rear suspension device.

5 to 7 all show modified examples of the present invention suitable as a front suspension system, in which the first control arm 6 is arranged at the upper part and the second control arm 13 is arranged at the lower part, Figure 6 shows the second part of the lower arrangement formed in a triangle.
The control arm 13 is designed to also serve as a radius loft, and FIG. 7 shows one in which the radius loft 16.16' is fully connected to the first and second control arms 6.13, respectively.

Further, FIG. 8 shows a modification of the present invention suitable as a rear suspension system, in which a radius ruffled 16 is connected to the axle 1.

Furthermore, FIG. 9 shows a modification of the present invention suitable as a front suspension system for a front wheel drive vehicle.
A rearwardly curved connecting member 8a is connected to the lower end of the connecting member 8a, and first and second control arms 6.13 are connected to both upper and lower ends of this connecting member 8a, and the front wheel drive shaft S is connected to the shock absorber 8. The connecting member 8a is disposed so as to pass inside the curved portion of the connecting member 8a to avoid interference with the connecting member 8a.

As described above, according to the present invention, a pair of upper and lower support arms are arranged in series on an axle, one of the support arms is connected via a first control arm that is vertically swingable, and the middle of the first control arm is connected to the upper and lower support arms. This extremely simple structure connects the other support arm to the shock absorber interposed between the front and the vehicle body through a vertically swingable second control arm, which is superior to conventional double bone and strand type suspension systems. Accordingly, it is possible to provide an independent suspension system with good performance and ease of assembly at a low cost.

[Brief explanation of drawings]

Fig. 1 is a rear view showing an embodiment of the device of the present invention, Figs. 2 and 3 are sectional views taken along the lines ■-■ and ■-■ in Fig. 1, and Fig. 4 is an explanatory diagram of the operation of the device shown in Fig. 1. , 5 to 9 are schematic perspective views showing modified examples of the apparatus of the present invention. 1...Axle, 2...Upper support arm, 3...Lower support arm, 6...
・First control arm, 8... Shock absorber, 13... Second control arm.

Claims (1)

[Claims] 1 A pair of upper and lower support arms are connected to the axle, and are connected to the vehicle body via a first control arm, which is one of the support arms, which can freely swing up and down, and are interposed between the intermediate part of the first control arm and the vehicle body. An independent suspension system for an automobile comprising a shock absorber connected to the other support arm via a second control arm that can swing vertically.