JPH0451048Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field of the invention) The invention relates to a vehicle suspension, and in particular,
Regarding strut suspension.

(Prior art) A strut type suspension is constructed by connecting a suspension arm to the lower end of a shock absorber, so the camber angle of the tire supported by this suspension is determined by the length of the suspension arm. Determined by the height and mounting angle.

(Problems to be Solved by the Invention) A suspension arm provided in a strut-type suspension is constituted by a single arm having an I-shaped or A to V-shaped planar shape. Therefore, once installed in the vehicle body, changes in the camber angle are simply determined by the trajectory of the suspension arm. Furthermore, the connection position of the suspension arm when it is assembled into the vehicle body is naturally limited. In other words, this means that in strut-type suspensions, there is less freedom in setting the camber change characteristics associated with bounce and rebound.

An object of the present invention is to provide a vehicle suspension with a large degree of freedom in setting camber change characteristics due to bounce and rebound.

(Means for Solving the Problems) The present invention provides a suspension for a vehicle in which an upper end of a shock absorber that supports tires via a wheel carrier is swingably connected to a vehicle body. at the lower end of
A support member is connected to be able to swing around an axis extending in the longitudinal direction of the vehicle, and two arms having different lengths are attached to portions of the support member spaced apart in the vertical direction of the vehicle. The two ends are connected so that they can swing around an axis that extends in the longitudinal direction of the vehicle, and the inner ends of each are connected to the vehicle body so that they can swing around an axis that extends in the longitudinal direction of the vehicle. two arms, the two arms are
It is arranged so that the long arm is located upward.

(Function) As the shock absorber bounces and rebounds, the lower end of the shock absorber moves on a trajectory determined by the two arms. Therefore, the camber change characteristics vary depending on the arrangement of the two arms, but since the long arm is located upward, the camber angle to the ground becomes smaller as the ball bounces.

(Embodiment) The suspension 10 includes a shock absorber 12, as shown in FIGS. 1 and 2.

At its upper end, the shock absorber 12 is connected to the vehicle body 16 via a support 14 of a structure known per se.
is swingably connected to. Since the support 14 generally has a rubber bush, the shock absorber 12 may be allowed to swing due to the deflection of the rubber bush, or the shock absorber 12 may be moved to the support 14 via a ball joint.
The shock absorber 12 may also be connected to the shock absorber 12 so that it can swing.

Shock absorber 12 and wheel carrier 1
8 is attached, and the shock absorber 12 rotatably supports the tire 20 via the wheel carrier 18.

A support member 22 is connected to the lower end of the shock absorber 12 so as to be swingable about an axis extending in the longitudinal direction of the vehicle.

In the illustrated embodiment, the support member 22 has a ball joint 24 at its upper end, and two mounting portions 25 provided below the ball joint 24 at intervals in the vertical direction of the vehicle. 26, and a ball joint 24 is connected to the lower end of the shock absorber 12.

Two arms 28 and 30 of different lengths are connected to the mounting portions 25 and 26 of the support member 22 by bolts and nuts so that they can swing around an axis extending in the longitudinal direction of the vehicle, and the long arm 28 is connected upwardly. A short arm 30 is arranged below. both arms 2
8 and 30 extend in the lateral direction of the vehicle body, and their inner ends are connected to mounting portions 31 and 32 of the vehicle body 16 with bolts, nuts, etc. so as to be swingable around an axis extending in the longitudinal direction of the vehicle. has been done.

A coil spring 32 is disposed between the shock absorber 12 and the support 14, and vibrations applied to the tire 20 are transmitted between the shock absorber 12 and the coil spring 3.
This can be suppressed by 2.

(Operation of the embodiment) When a running vehicle turns, the tires 20 located on the outside enter a bound state, and the two arms 28 and 30 swing upward around the mounting portions 31 and 32, causing the support member 22 upward.
Since the upper arm 28 is longer than the lower arm 30, it swings in an arc with a larger radius than the lower arm 30. As a result, the mounting parts 25 and 26 on the support member 22 side of both arms 28 and 30 are arranged such that the upper mounting part 25 is wider than the lower mounting part 26 in the lateral direction of the vehicle body, as shown by the imaginary line in FIG. The support member 22 is moved outward to push out the support member 22.

The center of the ball joint at the joint of the shock absorber 12 with the support member 22 is moved laterally outward of the vehicle body by x compared to when the shock absorber 12 is swung by a single arm, and 20 has a large camber angle θ. This camber angle θ
is in the opposite direction to the direction in which the tire 20 tilts together with the vehicle body when bouncing, so an increase in the camber angle is suppressed, and the camber angle with respect to the ground is reduced.
The tread change is small.

The distance x can be increased or decreased depending on the lengths of the two arms 28, 30, the spans of the attachment parts 25, 26 on the support member 22 side, and the spans of the attachment parts 31, 32 on the vehicle body 16 side. By appropriately arranging the ground camber angle, the ground camber angle can be determined as desired.

Figure 3 shows how the ground camber angle and tread change from bounce to rebound. In the figure, A is the ground camber angle in the suspension according to this embodiment, B is the tread, and C is the ground camber angle in the conventional suspension.
D is treaded.

(Effects of the invention) Since this invention is a strut-type suspension, it is possible to separate the force from the road surface and input it to the vehicle body, making it easy to make adjustments in consideration of vibration and noise.
The structure is simple.

Since it has two arms, it has a greater degree of freedom in selecting camber change characteristics than a conventional strut suspension that has a single arm.

Since the long arm is located upward, the ground camber angle becomes smaller as the ball bounces. Thereby, turning performance can be improved. Furthermore, since there is little tread change during bounce, stability, especially during high-speed running, can be improved, and ride comfort is improved because the inclination of the arm can be changed without changing the roll center height.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the suspension, FIG. 2 is a front view schematically showing the suspension, and FIG. 3 is a characteristic diagram showing changes in camber angle and tread. 10... Suspension, 12... Shock absorber, 18... Wheel carrier, 22...
Support member, 24... Ball joint, 25, 2
6, 31, 32...Mounting section, 28, 30...Arm.

Claims (1)

[Scope of utility model registration request] A vehicle suspension in which an upper end of a shock absorber that supports tires via a wheel carrier is swingably connected to the vehicle body, and an axis extending in the longitudinal direction of the vehicle is attached to the lower end of the shock absorber. a support member connected to be swingable around the vehicle; and two arms having different lengths, each of which has an outer end attached to a portion of the support member spaced apart in the vertical direction of the vehicle. two arms connected to the vehicle body so as to be swingable around an axis extending in the longitudinal direction of the vehicle; a vehicle suspension, the two arms being arranged such that the longer arm is positioned upward.