JPS5822365B2 - Handle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing vibrations occurring in the steering wheel of an automobile, and in particular to a method for preventing vibrations occurring in the steering wheel of an automobile, and particularly for an automobile whose front wheels are suspended by a spring member.
・Relates to a method for preventing vibrations that occur in the steering wheel.

In general, in order for the left and right front wheels of a vehicle to rotate smoothly without vibration, the wheels must have uniform mass around the wheel axle.

If the wheel does not turn precisely, is deformed into a circular or other shape, or if the mass is distributed unevenly, e.g. by an air injection valve, then as the wheel rotates, uneven forces may be applied to the wheel in the radial direction. This occurs in the axle, causing the wheel to jump on the road, causing the wheel axle to jump or vibrate.

The vibrations of the front wheels are transmitted to the steering wheel through the steering system, which has a link that connects the steering wheel with the front wheels, and when the front wheels jump,... The short period that causes movement is vibration.

Such vibrations occur as resonance, especially when the vehicle is traveling at a certain speed, and give a great sense of anxiety to the driver of the vehicle.

Conventionally, a method has been proposed in which vibrations occurring in such a bundle are alleviated through an elastic ring attached to a steering device provided between the vehicle suspension and the bundle.

Although this method can indeed damp vibrations, it has the disadvantage of reducing maneuvering precision.

The object of the invention is to provide a method for preventing vibrations occurring in the bundle without affecting the precision of maneuvering.

According to the invention, this object is achieved by arranging suspensions on the left and right front wheels that have completely different spring characteristics in the longitudinal direction of the vehicle.

A first object of the present invention is to provide a method for preventing vibrations of the bundle which may cause fear to the operator.

Such vibrations are resonant vibrations that occur when the vehicle travels at a specific speed.

In the development of the present invention, it was discovered that if the wheels are unbalanced or deformed into a circular shape, the impact from both front wheels becomes the source and causes vibration in the bundle, and the maximum level of vibration is from the front wheels. It has been found that this is obtained when the shocks are 180° out of phase.

That is, if both front wheels are unbalanced, they will jump, and if they jump in the same direction at the same time, the wheels will descend at the same time.

In this case... vibrations occurring in the handle are normal.

This means that the unbalanced mass of the wheel is always located at the same angular position on both wheels.

If the vehicle starts with the unbalanced position of one wheel being 180 degrees out of sync with the unbalanced position of the other wheel, when one wheel jumps, the other wheel will drop.

A vibrational impulse from the wheel occurs every time the wheel rotates 180 degrees.

At this wheel position, the vibrations generated in the bundle are at a maximum.

If the resonance frequencies of the left and right wheels are different, they will resonate at the same time and will never jump with the same amplitude.

If one wheel jumps with the maximum amplitude, the other wheel then does not have the maximum amplitude, and therefore no maximum disturbance occurs in the wheel, and the same maximum disturbance does not occur if the method according to the invention is not adopted. It is much reduced compared to .

That is, in the present invention, the spring characteristics of the left front wheel suspension and the spring characteristics of the right front wheel suspension are different to cause resonance to occur at different frequencies.

Therefore, the results can be applied to the design of wheel suspensions for practical vehicles; however, the structure of the wheel suspension is necessarily completely different depending on each vehicle.

The prevention method according to the present invention can be applied to a known wheel suspension in which a wheel axle is rotatably supported by a control arm or a swing arm, and the arm is attached to a vehicle, and a preferred embodiment is described below based on the drawings. Describe it as follows.

The figure shows a plan view of a control arm of a wheel suspension, and generally a wheel axle of a front wheel suspension is rotatably supported by a control arm 1 or a swing arm.

Further, the control arm 1 is swingably attached to the vehicle body, and furthermore, the control arm 1 is attached to the vehicle body at two connection points.

The two connection points are formed in the form of journal bearings 2, 3 and lie on the same axis 4 in the longitudinal direction of the vehicle.

One journal bearing 2 is normally located just inside the wheel axle, and the other journal bearing 3 is attached to the vehicle body in front or behind the imaginary extension of the wheel axle.

The journal bearing is provided with a rubber bush 5, which carries the load in the longitudinal direction of the vehicle.

In the wheel suspension configured as described above, the rubber bushings according to the present invention have different spring constants for the left and right front wheels.

Such an arrangement is very simple, so that the rubber bushings can be made of different dimensions or of different materials.

Therefore, there is no need to additionally provide any other parts, and there is an advantage that the structure can be constructed at a very low cost both in terms of structural members and assembly costs.

As an alternative to the embodiment described above, a modification to the same type of wheel suspension is to construct the control arm so that it is telescopic along the longitudinal direction of the vehicle and has different elastic properties on the left and right sides of the vehicle. be able to.

[Brief explanation of the drawing]

The figure shows a top view of the control arm. 1...Control arm, 2.3...Journal bearing, 4...Coaxial line, 5...Rubber bushing.

Claims (1)

[Claims] 1. When the mass of the front wheels is unbalanced or deformed into a circular shape, uneven force is applied in the radial direction around the axle while the vehicle is running, which causes vibrations that occur in the steering wheel of the vehicle. What is claimed is: 1. A method for preventing vibration of a bundle of an automobile, characterized in that the elastic properties of suspensions that suspend left and right front wheels are made different in the longitudinal direction of the vehicle.