JPH0352161Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a vehicle suspension, and more specifically, a vehicle suspension that is rotatably supported around a kingpin and includes a steering knuckle that supports wheels. Regarding Shion.

(Prior Art) A steering knuckle supports a wheel and is rotatably supported around a kingpin, and a knuckle arm provided thereon is connected to a steering device to enable steering of the wheel. The kingpin is inclined with respect to the vertical line so that its lower side is outward in the widthwise direction of the car body, while the wheels are generally tilted in the opposite direction to the kingpin, that is, so that its upper side is outward in the widthwise direction of the car body. tilted.

If the angle of inclination of the wheel with respect to the vertical line, that is, the camber angle, is too large, the camber thrust becomes large, impairing performance during turning, and causing problems such as uneven tire wear.

(Problem to be solved by the invention) There have been attempts to alleviate the above problem by changing the camber angle as the wheels bounce and rebound, but the camber angle also changes due to changes in vehicle height due to loading conditions. This is undesirable in terms of preventing uneven tire wear.

In the strut-type suspension system described in Japanese Utility Model Application Publication No. 56-124005, the steering knuckle is rotatably supported by a king pin support member provided on the outer cylinder of the shock absorber, allowing freedom in setting the camber angle. Although the camber angle is increased, the camber angle is uniquely determined after being set to a predetermined value, and cannot be set to a preferable camber angle depending on the turning situation during driving.

In a separately proposed automobile suspension (Utility Application No. 59-1806), a shock absorber or suspension arm is formed to be movable in the width direction of the vehicle body by an actuator, and a sensor for detecting the turning state of the vehicle and a A sensor is provided to detect the traveling speed of the vehicle, and the actuator is actuated by both sensors. According to this, the camber angle can be appropriately selected depending on the turning situation, but an actuator, a sensor, a control device, etc. are required, making the entire device complicated and expensive.

SUMMARY OF THE INVENTION An object of the present invention is to provide a suspension for a vehicle that can improve turning performance by imparting a camber angle to the wheels according to turning conditions, and can prevent uneven tire wear.

Another object of the present invention is to provide a suspension for a vehicle that has a simple structure, suppresses high costs, and does not change the camber angle due to changes in vehicle height.

(Means for Solving the Problem) The suspension according to the present invention includes a steering knuckle having a knuckle arm that is rotatably supported around a kingpin having a ball joint below, and a steering knuckle that is arranged in the width direction of the vehicle body. a suspension arm that is connected to the suspension arm at one end via the ball joint, and a lever that is pivotally connected to the steering knuckle at a portion spaced apart from the end by a predetermined distance; a rod of a steering device movable in the width direction of the vehicle body; a first tie rod connected to the rod and the knuckle arm; and a second tie rod connected to the rod and the other end of the lever.
Including tie rods.

(Function and Effect) When the steering wheel of a running vehicle is rotated in one direction, the rod of the steering device moves toward one side in the width direction of the vehicle body, and the steering knuckle engages the first and second tie rods and the lever. The wheel is rotated around the axis of the kingpin, and the wheel is steered. At the same time, the steering knuckle is pivoted by the first tie rod about its connection with the lever, reducing the camber angle of the wheels.

The wheels are steered by the first and second tie rods and levers, and the first tie rod changes the camber angle to adjust the camber angle of the wheels to suit the turning situation, improving turning performance and improving tire durability. Uneven wear performance can be greatly improved.

Since only the second tie rod is added, the structure does not become particularly complicated, and an increase in cost can be suppressed.

Since the camber angle is changed only during steering and does not change when the vehicle height changes, the uneven wear resistance of the tire can also be improved from this point of view.

(Example) The suspension 10 has a kingpin axis 12
a steering knuckle 14 pivotably supported about the steering knuckle 14;

In the example shown in FIGS. 1 and 2, the suspension 10 is a double wishbone suspension system, and the center of the ball joints 20 and 22 attached to the outer ends of the upper arm 16 and the lower arm 18 is The ties form a kingpin, and the steering knuckle 14 is supported for pivoting about the kingpin axis 12 as will be described below. The inner ends of the upper arm 16 and the lower arm 18 are pivotally connected to the vehicle body via rubber bushings (not shown).

The steering knuckle 14 integrally includes an axle 26 that supports the wheel 24, a knuckle arm 27 extending in the lateral direction substantially perpendicular to the axle 26, and a mounting arm 28 extending in the longitudinal direction substantially perpendicular to the axle 26 and the knuckle arm 27. , mounting seats 29a, 29 are provided at the upper and lower ends of the mounting arm 28.
b is provided. The mounting seat 29a is coupled to the upper arm 16 by a ball joint 20 so as to be able to swing up and down and pivot back and forth.

One end 31a of the lever 30 is coupled to the lower arm 18 by a ball joint 22 so as to be able to swing up and down and pivot back and forth. The lever 30 is formed of a straight member and has an end 31
A pin hole 31b is provided at a location a predetermined distance L from the center of the ball joint a. The distance L is
It is determined by taking into account the inclination angle of the king pin, the camber angle set on the wheel 24, etc. A pin 32 is inserted into the pin hole 31b, and this pin 32 is inserted into a hole in the mounting seat 29b of the steering knuckle 14.
The lever 30 is coupled to the steering knuckle 14 so as to be pivotable back and forth. As a result, the steering knuckle 14 is connected to the upper arm 16 via the upper and lower mounting seats 29a on the one hand, and to the lower arm 16 via the lower mounting seat 29b and the lever 30 on the other hand.
8, a steering device rod 34 is arranged so as to be movable in the width direction of the vehicle body, and is movable in the width direction of the vehicle body. In the illustrated example, rod 3
4 is a rack bar of a rack and pinion type steering device. Rod 34 and Natsukuru Arm 27
Then, the first tie rod 36 also connects the rod 34.
and the other end 31c of the lever 30, a second tie rod 38 is coupled via a ball joint 40, respectively.

In the above example, the suspension 10 is of a double wishbone type, and a kingpin is formed by ball joints 20 and 22 attached to the outer ends of the upper arm 16 and the lower arm 18, respectively.

Alternatively, the invention may be applied to a MacPherson strut type suspension. In this case, the kingpin is provided at the ball joint provided below at the joint between the suspension arm and the steering knuckle or between the suspension arm and the shock absorber, and at the top at the joint between the shock absorber and the vehicle body. formed by a rubber bushing or a rubber bushing and a rolling bearing.

(Operation in Practical Example) When the handlebar of a running vehicle is rotated, for example, to the left, the rod 34 of the steering device moves to the right in FIG. Accordingly, the steering knuckle 14 is turned counterclockwise around the kingpin axis 12 by the first tie rod 36, the second tie rod 38, and the lever 30, and the wheels 24 are steered. At the same time, the mounting seat 29b of the steering nut 14 is pivoted by the first tie rod 36 about the pin 32 at the joint with the lever 30, so that the camber angle of the wheel becomes smaller.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing the main parts of the suspension;
FIG. 2 is an exploded perspective view. 10...Suspension, 12...King pin axis, 14...Steering nutcle, 16...
...Atsupa arm, 18...Lower arm, 20,2
2,40...Ball joint, 26...Axle, 27...Natsukuru arm, 30...Lever,
34...rod, 36...first tie rod, 3
8...Second tie rod.

Claims (1)

[Scope of utility model registration request] a steering knuckle having a knuckle arm that is rotatably supported around a king pin having a ball joint below; a suspension arm disposed in the width direction of the vehicle body; a lever coupled to the steering knuckle at one end thereof and pivotably coupled to the steering knuckle at a portion spaced apart from the end by a predetermined distance; a steering device rod movable in the width direction of the vehicle body; A vehicle suspension comprising a first tie rod coupled to a rod and the knuckle arm, and a second tie rod coupled to the rod and the other end of the lever.