JPS6020490Y2 - vehicle suspension system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a suspension device in which a torsion spring means having a composite structure of a torsion bar and a torsion pipe provides a spring effect, and a suspension device in which the torsion spring means provides a stabilizer effect.

2. Description of the Related Art Suspension systems that use torsion bars as shock absorber springs and the like in vehicle suspension systems are known.

If a torsion bar is provided for each wheel, the length will be too long to obtain a sufficient spring effect, so the torsion bar is connected to a torsion pipe as a torsion spring, and the internal and external composite structure of the bar and pipe is used to separate each wheel. A total spring rate can be obtained, thereby increasing the spring effect and shortening the length of the torsion spring to make it more compact.

By the way, a stabilizer is provided as a mechanism to prevent the vehicle from shaking when turning or the like, and the purpose of the stabilizer is to provide running stability.

Although such a stabilizer is constructed using a torsion bar, a separate stabilizer is also provided in a suspension system using torsion spring means as described above.

The inventors of the present invention focused on torsion spring means consisting of inner and outer bars and pipes, and devised the present invention to use this as a stabilizer. Certain torsion pipes are pivotally connected to each other by a connecting rod, and when a spring action is applied to the torsion spring means of one wheel during turning, etc., the torsion of this is transmitted to the spring means of the other side by the connecting rod, and the spring of the other side is To suppress twisting of the means and obtain a stabilizer effect,
To provide a suspension system for a vehicle that uses existing spring means, has a simple waist structure, uses existing parts, reduces the number of parts, and can obtain an effective stabilizer while reducing costs.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a cutaway plan view of the suspension system, Figure 2 is the view from arrow 2 in Figure 1.
FIG.

Reference numeral 1 denotes a cross member provided at the front of the vehicle, and torsion spring means 2.12 are provided at both ends of the cross member 1 in the longitudinal direction and spaced apart in the vehicle width direction.

The torsion spring means 2, 12 include torsion pipes 3, 13 which are external members provided in the front-rear direction and whose front ends are joined to both ends of the cross member 1, and torsion bars 4. It consists of 14.

The torsion bars 4, 14 have their rear ends 4a, 14a connected to the inner circumferences of the rear ends 3a, 13a of the pipes 3, 13 by serrations or the like, and are integrated at this portion.

The tips of the torsion bars 4.14 protrude forward from the tips 3bt13b of the pipes 3, 13, and the bases of the lower arms 5, 15 extending outward are connected to the tips 4b, 14b by serrations or the like. , 15 are connected to the left and right wheels 6, 16, and wheel support members such as knuckles, radius arms, shock absorbers, etc. are omitted in the embodiment.

The spring action on the wheels 6, 16 is caused by the lower arms 5, 1
5 by the torsion of the torsion bars 4, 14 and the torsion pipe 3.13 connected to the rear ends of the torsion bars 4, 14, the spring rate in this case being obtained by a combination of the bar and the pipe.

In the above, the bracket 7 is installed upright on the rear end of one of the torsion pipes 3, and the bracket 17 is installed hanging below the rear end of the other pipe 13.

The brackets 7.17 are connected by a connecting rod 8, one end of the connecting rod 8 is pivotally connected to the bracket 7 with a pin 9, the other end is pivotally connected to the bracket 17 with a pin 19, and the bracket 7.17 is in the projecting direction. The connecting rod 8 has one end above the pipe 3 and the other end below the pipe 13, so that the connecting rod 8 is connected diagonally across the pipe 3, as shown in Fig. 2. 13 Connect the rear end portions.

In the above, FIG. 3 shows a state in which both wheels 6 and 16 ride on a protrusion, etc. When the wheels 6 ride on the wheels 6, the lower arm 5 rises and passes through the torsion bar 4 to the torsion pipe 3.
is twisted clockwise in the figure, the connecting rod 8 is pushed in the direction of the arrow, and when the other wheel 16 rides on the lower arm 15,
The pipe 13 is twisted counterclockwise through the bar 14,
A state in which the connecting rod 8 is pulled in the direction of the arrow and the directions are the same is shown.

FIG. 4 shows a state in which the vehicle is turning, and as is known in the art, when the vehicle is turning, the shock absorber on one wheel in the width direction of the vehicle body moves toward the bump side, and the shock absorber on the other wheel moves toward the rebound side.

For example, if the wheel 16 side is the bump side, the bar 14 is twisted counterclockwise via the lower arm 15, the pipe 13 is twisted in the same direction, the rod 8 is pulled to the right, and the other wheel 6 is rebound side, the bar 4 is about to be twisted counterclockwise via the lower arm 5,
The pipe 3 tries to twist in the same direction, and the connecting rod 8 is pulled to the left.

In this manner, when one wheel is moved to the rebound side by the connecting rod 8 during turning, an effect of suppressing the movement of the other wheel to the rebound side, that is, a stabilizer effect can be obtained.

It is clear that when the wheel 6 side is the bump side, compressive force acts on the connecting rod 8 from the left and right sides, and a similar stabilizer effect can be obtained.

By the way, in the embodiment, the connecting rod 8 is a torsion bar 4.14.
and the torsion pipes 3 and 13, but by moving the connecting rod 8 forward from the rear end of the pipe, the torsion spring characteristics change, and the characteristics of the stabilizer effect can be changed, and the torsion spring Appropriate changes can be made depending on the composite spring rate of the means and the vehicle.

As is clear from the above, according to the present invention, the stabilizer effect that does not require a separate stabilizer torsion spring can be obtained simply by connecting the left and right composite torsion spring means made of a bar and a pipe to the sill using a connecting rod. ,
A practical stabilizer can be obtained with a simple structure of adding a connecting rod and a minimum number of parts while also serving as a suspension spring.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a plan view with the main parts broken away, Fig. 2 is a view in two directions as seen from the arrow in Fig. 12, and Figs. 3 and 4 are action explanatory views. It is. In the drawing, 1 is the vehicle body, 3.13 is the torsion pipe, 4,
14 is a torsion bar, 6 and 16 are wheels, and 8 is a connecting rod.

Claims (1)

[Scope of utility model registration request] Left and right torsion pipes fixed to the vehicle body and extending in the front-rear direction, and a torsion pipe that passes through each pipe and connects one end to the torsion pipe, and the other end extending from the pipe is connected to the left and right axle support members. What is claimed is: 1. A suspension system for a vehicle, comprising: a bar, wherein the left and right torsion pipes are connected to each other by a connecting rod having both ends pivotally connected to each other.