JPS5843494Y2 - Steering wheel vibration damping structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a steering wheel allocation structure for an automobile.

In a car, vibrations from the wheels are transmitted to the steering wheel through the steering system while the car is running, causing the steering wheel to vibrate and causing significant discomfort to the driver.

To solve this problem, a ring-shaped weight body is attached concentrically to the steering shaft via an elastic body, and a dynamic damper made of the weight body and the elastic body absorbs and eliminates vibrations in the direction of rotation of the steering shaft. A device to do this has already been developed (see Japanese Utility Model Publication No. 49-16016).

However, in the prior art described above, a dynamic damper is provided concentrically on the steering shaft, and the distance from the center of rotation to the dynamic damper is small, making it ineffective as a damper for absorbing vibrations in the direction of rotation. In order to accurately absorb vibrations in the rotational direction, the dynamic damper must be made quite large, which not only creates problems in terms of installation space but also has drawbacks such as an increase in weight.

The object of the present invention is to provide a vibration damping structure for a steering wheel that can overcome all the drawbacks of the prior art as described above.

The present invention will be explained below with reference to the embodiments shown in the accompanying drawings.

In FIG. 1, 1 is the steering wheel body, 2 and 3 are gripping parts, and the gripping parts 2 and 3 are connected at a hollow joint 4 formed at the tip of a spoke 5, and are shaped into a generally circular shape as usual. A grip portion is configured.

A cover 6 covers the upper surface of the spoke 5.

As shown in FIG. 2, the gripping parts 2 and 3 are
The outer periphery of the weight 7a is integrally covered with resin materials 2b and 3b, and the hollow portion 4a4 of the joint portion 4 connecting the grips 82 and 3 is provided with an elastic material 7 such as rubber at both ends of the weight 7a.
A dynamic damper 7 that combines parts b and 7c is attached.

The dynamic damper 7 has an elastic body 7b.

Plate 7d is respectively coupled to the end face of plate 7c.

7e to the gripping parts 2 and 3 so as to cover the end faces of the gripping parts 2 and 3.
3 and the connecting portion 4.

FIG. 3 shows another embodiment of the present invention. In this embodiment, the elastic bodies 7b and 7c constituting the dynamic damper 7 are replaced with rubber or the like of the previous embodiment, and are constructed with a spring, and one end is formed of a wire 7a. An example is shown in which the dynamic damper is installed in the coupling part 4 by coupling the other ends of the springs, which are coupled to the ends of the two ends, to the ends of the core metals 2a and 3a, respectively.

When a car is running, the tires vibrate due to unbalanced tires or their relationship with the road surface, and the vibrations are transmitted to the steering wheel from the torque rond and steering shaft, etc.
This can lead to extremely uncomfortable driving conditions, but as described above, according to the present invention, this vibration is greatly reduced by the dynamic damper installed inside the grip of the steering wheel, thereby eliminating the problem of driver discomfort. Eliminate the
This makes it possible to improve drivability and stability.

In addition, in this invention, the dynamic damper is installed inside the grip of the steering wheel at a certain distance from the center of rotation, so the vibration absorption function in the direction of rotation is extremely good, and the damper can be placed within the grip of a normal steering wheel. A small dynamic damper can sufficiently absorb and reduce vibrations in the direction of rotation of the steering wheel, and together with the fact that it requires a special installation space and takes 1S, it can bring about great practical effects.

In addition, if the steering wheel is divided at the joints with the spokes and the dynamic damper is installed in the joints as in each of the above embodiments, it is very advantageous in terms of structure and assembly time, and is practical. It is extremely effective, but if you think about it from the perspective of reducing steering wheel vibration,
The dynamic damper may be installed at any location within the grip of the steering wheel, and the number of dynamic dampers may be installed at any location (
You can set this.

[Brief explanation of the drawing]

FIG. 1 is a front view of a steering wheel showing one embodiment of the present invention, FIG. 2 is a detailed sectional view of section A in FIG. 1, and FIG. 3 is a sectional view showing another embodiment of the present invention. 1... Steering wheel body, 2, 3...
...Gripping part, 4...Connecting part, 5...
・Spoke, 6...Cover 7...Dynamic damper, 7a...Weight, 7b
, 7c...Elastic body, 7d, 7e...Plate.

Claims (3)

[Scope of utility model registration request] (1) A steering wheel allocation structure characterized in that a dynamic damper is provided in the grip portion of the steering wheel to absorb vibrations of the steering wheel transmitted from the wheels through the steering system while the vehicle is running. (2) Scope of the utility model registration claim characterized in that the gripping portion of the steering wheel is divided, the divided gripping portions are connected by a hollow connecting portion, and a dynamic damper is provided in the hollow portion of the connecting portion. The steering wheel allocation structure described in item 1. (3) The steering wheel allocation structure according to claim 2, wherein the coupling portion is integrally formed at the tip of the spoke.