JPS6331812A - Suspension device for automobile - Google Patents

Abstract

PURPOSE:To give a desired toe change depending upon type and obtain good running stability by locating the fitting member of a stabilizer at the body side offset above or below from the fitting position of a suspension arm at the body side. CONSTITUTION:A pair of connection eyes 6a and 6b on both sides of the front of a suspension arm 4 are connected to the bracket 1b of a cross-member 1a laid in the widthwise direction of a body 1. And the central part of a stabilizer 5 is provided along the cross-member 1a. This central part is so supported on the bracket 8 of the crossmember 1a as to be capable of free turn and both ends thereof are fixed to the bracket 10 of the suspension arm 4. In this case, the bracket 8 is located at the position whereat the turning axis of the stabilizer 5 is offset above from the eyes 6a and 6b. According to the aforesaid constitution, the suspension arm 4 is subjected to the partial load of the stabilizer 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in an automobile suspension system, and more particularly, to an automobile suspension system that can obtain a desired toe change.

[Prior art]

Conventionally, there has been a trailing suspension system as an independent suspension system mainly employed in the rear suspension of automobiles. In this suspension device, the front end of a suspension arm is pivotally attached to a pair of support members arranged laterally on the vehicle body side, a wheel is pivotally supported at the rear end, and the wheel is resiliently supported by a spring and a damper. In order to improve roll rigidity, the tip of the stabilizer, whose intermediate portion is rotatably attached to the vehicle body, is bent rearward.
Fixed to both suspension arms. This type of suspension system has the advantage that there is almost no change in the tread and camber, and the impact when the vehicle runs over an obstacle is small. Also, the front end of the trailing arm should be placed 2 points toward the vehicle body.
Since it is supported at points, it has high lateral rigidity.

Similar to this type of suspension system, there is a semi-trailing type suspension system in which a support member at the front end of a trailing arm is arranged at an angle. With this system, the camber angle becomes negative when basiping, so the wheels have good ground contact, and by appropriately setting the inclination angle of the front end support member, the characteristics can be brought close to those of the trailing system or swing axle system. Widely used in rear suspensions.

[Problem that the invention seeks to solve]

By the way, it is known that toe-in improves driving stability when the rear wheels swing during a bump, and that turning performance is improved when the rear wheels toe-out when turning.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a suspension device for an automobile that can obtain a desired toe change.

Means for Solving Problem C) The means of the present invention for achieving the above object is such that the front end has a predetermined width, and two points on both sides of the front end are applied to the vehicle body by means of rubber pushers. The suspension arm is provided with a suspension arm that is connected so as to be swingable in a direction and rotatably supports a wheel at a rear side portion, and a stabilizer that is fixed to an end suspension and whose middle portion is attached to a vehicle body. The vehicle body side mounting member of the stabilizer is mounted at a position offset upward or downward from the vehicle body side mounting position of the stabilizer.

[For production]

When a wheel swings upwards, such as during a bump, the suspension arm rotates upwards around the two mounting points on both sides of its front end on the vehicle body, while the stabilizer whose end is fixed to the suspension arm It also rotates around the mounting part on the vehicle body side. However, since the vehicle body side mounting member of the stabilizer is mounted at a position offset upward or downward from the vehicle body side mounting position of the suspension arm, the centers of rotation of the suspension arm and the stabilizer are different. Therefore, a deflection load from the stabilizer acts on the suspension arm, and the rubber push is deformed, causing the wheel to change toe.

〔Effect of the invention〕

In the automobile suspension system of the present invention, the mounting member of the stabilizer on the vehicle body side is mounted at an offset position above or below the mounting position of the suspension arm on the vehicle body side, so that a desired toe change can be achieved depending on the model. It is possible to provide good running stability and maneuverability.

〔Example〕

The present invention will be described in detail below based on examples thereof.

The automobile suspension device of the present invention is a trailing type rear wheel independent suspension device that can obtain a desired toe change depending on the model.

As shown in FIGS. 1 and 2, the front end has a predetermined width, and is connected to the vehicle body 1 at two points on both sides of the front end via rubber pushers 2 so as to be swingable in the vertical direction, A suspension arm 4 is provided at a rear side portion to rotatably support a wheel 3 mounted on a rim 3a. A stabilizer 5 whose both ends are fixed to the left and right suspension arms 4
An intermediate portion of the suspension arm 4 is rotatably mounted on the vehicle body 1 at a position offset upwardly from the mounting position of the suspension arm 4 on the vehicle body 1 side.

A pair of connecting eyes 5a and 5b with rubber pushers 2 interposed therebetween are provided on both sides of the front end of the suspension arm 4.

The connecting eyes 6a, 5b are pivotally connected to a bracket 1b fixed to a cross member 1a arranged laterally in the vehicle body 1 through a connecting pin 7, so that the suspension arm 4 can swing vertically. A coil spring and a suspension damper (not shown) are interposed between the suspension arm 4 and the vehicle body 1 to absorb and reduce vibrations from the wheels 3.

The center portion of the stabilizer 5 is connected to the cross member 1a.
It is rotatably supported by a bracket 8, which is a mounting member provided on the cross member 1a, via a rubber pusher 9, and both sides of the bracket are bent rearward so as to be attached to the center inner side of both suspension arms 4. It is fastened and fixed to a bracket 10 provided in the section with a port 11. As shown in FIG. 3, the bracket 8 is arranged at a position where the rotating shaft 5a of the stabilizer 5 is offset upward with respect to the connecting eyes 5a and 5b. In addition, stabilizer 5
When the stabilizer 5 is attached to the bracket 10, the position is adjusted by means of a napft 12 which is screwed into a screw groove cut into the stabilizer 5, so that the toe change can be minutely adjusted.

The automobile suspension device configured in this way is
When the wheel 3 swings upward significantly as shown in FIG. 3 during a bump or the like, the wheel 3 is toeed in as shown in FIG. 2, improving driving stability.

As shown in Fig. 4, when the axle 3 (indicated by point d in the figure) tilts upward around the connecting eyes 5a and 5b (points a and b) and is displaced to the position dl, for example, the stabilizer 5 attempts to displace to point 01 on the trajectory shown by the solid line around its axis 5a (point c), while the stabilizer 5 attempts to displace to the center of the suspension arm 4 (e in the figure).
Since one end is fixed to the bracket 10 at point a
An attempt is made to reach 82 points on the trajectory indicated by the dashed line with the point as the center. Therefore, the above point e is forcibly pushed toward point 01 by the stabilizer 5, and the tip of the suspension arm 4 is pushed outward as shown by the two-dot chain line in FIG. 2 due to the deformation of the rubber pusher 2. The wheels 3 are towed in. Therefore, by arranging the bracket 8 at the position described above, good running stability is exhibited even against rocking during bumps and the like.

Contrary to the above, if the bracket 8 is placed below the connecting eyes 5a and 5ty so that the axis 5a (point c) of the stabilizer 5 is located at the point C° in FIG. Due to the rotation, the above point e tries to move to e3 along the trajectory shown by the broken line, so the suspension arm 4 is pulled inward at the center (point e in the figure), which is opposite to the above. Its tip is deflected inward and the wheel 3 is toed out. Therefore, in a sporty automobile that requires nimble maneuverability, setting the stabilizer 5 at such a position provides good turning performance and stable maneuverability.

In this embodiment, a trailing type suspension device has been described, but it goes without saying that the present invention can also be applied to a semi-trailing type suspension device.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an automobile suspension device according to an embodiment of the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a view taken along the line ■-■- in Fig. 2, and Fig. 4 is a toe change. It is a schematic diagram explaining the state of. 1-・-Vehicle body, 2-Rubber push, 3-・Wheel, 4・
- Suspension arm, 5. - Stabilizer.

Claims (1)

[Claims] (1) The front end has a predetermined width, is connected to the vehicle body at two points on both sides of the front end so as to be able to swing vertically through rubber pushers, and the rear side part supports the wheels so as to be freely rotatable. The stabilizer includes a suspension arm, and a stabilizer whose end portion is fixed to the suspension arm and whose intermediate portion is attached to the vehicle body, and with respect to the mounting position of the suspension arm on the vehicle body side,
A suspension device for an automobile, characterized in that the vehicle body side mounting member of the stabilizer is mounted at a position offset upward or downward.