JPH04365669A - Steering vibration restraining device for vehicle - Google Patents

Abstract

PURPOSE:To provide a steering vibration restraining device in which a resilient member is used in each of necessary parts so as to reduce the cost thereof, and the coupling between a mass member and the resilient member is enhanced so as to stabilize the operation. CONSTITUTION:A columnar resilient member 22 is disposed in each of locking holes 23a formed in a mass member 23, having a locking protrusion (forward end part) 26 fitted in the locking hole 23a. Accordingly, the mass member 23 may be attached to the resilient members 22 without using vulcanization and adhesion as conventionally used. That is, the mass member 23 may be firmly supported by the resilient members 22 without being vulcanized and l bonded. Since the mass member 23 is integrally incorporated with a damping protrusion 28 projected from the outer periphery of the mass member 23, the damping protrusion 28 at first impinges upon the mass member 23 so as to serve as a damping member. Accordingly, it is possible to prevent a peripheral equipment from being damaged. Further, the resilient members 23 are attached each for each locking hole 23a, but it is not provided at unnecessary positions, it is possible to advantageously reduce the cost.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering vibration suppressing device for a vehicle.

0002

2. Description of the Related Art Conventional steering vibration suppression devices for vehicles include those shown in FIGS. 3 to 5, for example.
(Refer to Utility Model Application Publication No. 1-168360). Reference numeral 1 denotes a steering shaft, and a non-slip protrusion 2 is provided along the direction of the steering shaft 1 on the outer periphery of the upper end (A side in the figure) of the steering shaft. 3 is a steering wheel, and a mounting member 4 is provided at the center of the steering wheel.
The protrusion 2 of the steering shaft 1 is fitted into the mounting hole of the steering shaft 1 so that the steering shaft 1 rotates together with the steering shaft 1.

[0003] A vibration suppressing device 8, which is integrally assembled from a base plate 5, a rubber body (elastic body) 6, and a mass body 7, is attached to the upper surface of the mounting member 4. The base plate 5 is formed by bending a rectangular metal plate, and has a round hole 5a in a downwardly facing recess 5c and a small hole 5b in an eccentric position. This round hole 5a is tightened with a nut 9 to a threaded portion (not shown) at the upper end of the steering shaft 1, and the small hole 5b is tightened with a screw 1.
By attaching the vibration suppressing device 8 to the attaching member 4 using the reference numeral 0, the vibration suppressing device 8 is attached to the steering wheel 3.

[0004] A mass body 7 is elastically supported on the upper surface side of the base plate 5 via a rubber body 6 while maintaining a predetermined distance from the base plate 5. That is, the rubber body 6 has an upper part 6a that covers the entire outer circumference of a mass body 7, which will be described later, and is largely open at the center, and has a U-shaped cross section and has both upper and lower ends of the base plate 5 inside. A lower portion 6b to be held and a support column 6c that elastically connects the upper portion 6a and the lower portion 6b are integrally formed.

The mass body 7 is a thick rectangular metal plate, and has a round hole 5 for mounting provided in the base plate 5 described above.
A round hole 7a and a small hole 7b are provided at positions corresponding to the small hole 5a and the small hole 5b. This is a through hole for use in attaching the base plate 5 to the steering shaft 1 and the attachment member 4 as described above. Further, the outer circumferential portion is formed to have a thin wall thickness, and is bonded to the inside of the upper portion 6a of the rubber body 6 covering this portion by vulcanization adhesion. The vibration suppressing device 8 thus formed is covered by a case 11 and stored in the center of the steering wheel 1. In such conventional technology, vibrations of the steering shaft 1 are suppressed by the mass body 7 vibrating due to vibrations transmitted through the steering shaft 1 during driving, etc. Even if it vibrates, the mass body 7
The rubber body 6 covering the outer periphery of the case 11 acts as a cushioning material to prevent damage to the inner surface of the case 11 and peripheral devices.

[0006]

However, since the rubber body 6 protects the entire circumference of the mass body 7, it is used in unnecessary places, which is disadvantageous in terms of cost. In addition, mass body 7
is bonded to the inside of the upper part 6a of the rubber body 6 by vulcanization adhesive, but if the adhesive should peel off, the mass body 7 can be held by only the clamping force of the very thin upper part 6a covering the outer periphery. Because it has to be held, excessive force is applied to this part, making it susceptible to deterioration.

[0007] The present invention has been made by paying attention to such conventional technology, and aims to reduce costs by using elastic bodies only in necessary locations, and to reduce the cost by using elastic bodies only in necessary locations. The present invention provides a steering vibration suppression device for a vehicle that operates stably by increasing the vibration.

[0008]

[Means for Solving the Problems] A steering vibration suppressing device for a vehicle according to the present invention has a plurality of locking holes formed in a mass body, each of which has an independent columnar elastic body at its tip end. A buffer protrusion that is fitted and protrudes outward from the mass body is integrally formed near the tip thereof.

[0009]

[Operation] According to the steering vibration suppressing device for a vehicle according to the present invention, an independent columnar elastic body is disposed in each of the plurality of locking holes formed in the mass body, and the elastic body The tip of the body fits into this locking hole, so
The mass body is attached to the elastic body without vulcanization bonding as in the prior art. In other words, the mass body is firmly supported by the elastic body without vulcanization adhesion. Moreover, since each elastic body is integrally formed with a buffer protrusion that protrudes from the outer periphery of the mass body, even when the mass body vibrates, the buffer protrusion hits first and acts as a buffer. Therefore, peripheral equipment is not damaged, and one elastic body is attached to each locking hole, and is not provided in unnecessary locations, which is advantageous in terms of cost.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. 1 and 2. Here, parts common to the conventional example are given the same reference numerals, and redundant explanations will be omitted. 20
The vibration suppressing device is composed of a base plate 21, an elastic body 22, and a mass body 23.

The base plate 21 is a rectangular thin metal plate, and is mounted at the center of the steering wheel 3 by screwing a mounting hole 21a into a mounting member (not shown).

[0012] The mass body 23 is attached to the base plate 21.
It is a rectangular and thick metal plate that is smaller than that of the metal plate, and three (plural) locking holes 23a are provided near the outer periphery. The locking hole 23a is a round hole having a larger diameter on the upper surface side of the mass body 23 and a smaller diameter on the lower surface side, as shown in FIG. 2, from the viewpoint of preventing the mass body 23 from falling off.

The elastic body 22 has a columnar shape and includes a bottom portion 25 that supports the mass body 23 from below, and a bottom portion 25 that supports the mass body 23 from below.
A locking protrusion (tip part) 26 projecting upward from the base plate 21 and a support column 27 that holds the bottom part 25 separated from the base plate 21 by a predetermined distance are integrally formed. The lower end (base end) of the support column 27 is joined to the base plate 21 with a slightly wider hem. And the bottom part 25
extends from the upper end of the support column 27 toward the outside of the mass body 23, and its tip portion protrudes from the outer periphery of the mass body 23 to form a buffer protrusion 28. This bottom part 25 and the support column 2
The joint part with 7 is slightly thicker on the lower side in consideration of strength. A locking protrusion 26 is provided on the upper surface of this bottom portion 25.
is provided. This locking protrusion 26 is connected to the locking hole 2 described above.
Corresponding to the shape of 3a, it has an inverted truncated cone shape with a large upper end and a small diameter at the bottom 25 position.

Therefore, the vibration suppressing device 20 is assembled by joining the base end of the elastic body 22 to the upper surface of the base plate 21 and fitting the locking protrusion 26 of the elastic body 22 into the locking hole 23a of the mass body 23.
After forming, the vibration suppressing device 20 is attached to the steering wheel 3 by screwing the attachment hole 21a of the base plate 21 to the attachment member of the steering wheel 3.

Since the mass body 23 is attached to the elastic body 22 by fitting the locking protrusions 26 of the elastic body 22 into the plurality of locking holes 23a formed in the mass body 23 in this manner, it is possible to attach the mass body 23 to the elastic body 22. It can be installed without using vulcanization bonding, and peeling will not occur. Therefore, since the mass body 23 is always securely attached to the elastic body 22, a stable vibration suppressing function can be exhibited. Further, an elastic body 22 is arranged for each of these locking holes 23a, and the mass body 23
Since each elastic body 22 is provided with a buffer protrusion 28 projecting from the outer periphery of the elastic body 22, even if the mass body 23 vibrates, the peripheral equipment will not be damaged. Furthermore, since the elastic body 22 is provided independently for each locking hole and can be provided only at necessary locations, there is no need to provide the elastic body 22 at unnecessary locations, which is advantageous in terms of cost. .

[0016]

Effects of the Invention As explained above, the steering vibration suppressing device for a vehicle according to the present invention has a plurality of locking holes formed in the mass body, and a columnar elastic body is arranged for each locking hole. At the same time, since the tip of the elastic body is fitted into the locking hole, the mass body can be attached to the elastic body without vulcanization bonding as in the conventional case. That is, since the mass body is firmly supported by the elastic body without vulcanization adhesion, peeling does not occur and adversely affect the elastic body. Moreover, since each elastic body is integrally formed with a buffer protrusion that protrudes from the outer periphery of the mass body, even when the mass body vibrates, the buffer protrusion hits first and acts as a buffer. Therefore, it does not damage peripheral equipment, and one elastic body is installed independently for each locking hole, so it is not installed where it is not needed, which is advantageous in terms of cost. .

[0017]

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a vehicle steering vibration suppression device according to the present invention.

FIG. 2 is a sectional view taken along the line SA-SA in FIG. 1;

FIG. 3 is an overall view of a steering wheel equipped with a conventional vehicle steering vibration suppression device.

FIG. 4 is a cross-sectional view taken along line SB-SB in FIG. 3;

FIG. 5 is a perspective view showing a conventional vehicle steering vibration suppression device.

[Explanation of symbols]

1 Steering shaft 20 Vibration suppression device 21 Base plate 22 Elastic body 23 Mass body 23a Locking hole 26 Locking protrusion (tip) 28 Buffer protrusion

Claims (1)

[Claims] Claim 1: A steering vibration suppression device for a vehicle in which a mass body is attached to a base plate fixed to a steering shaft via an elastic body, in which a plurality of locking holes formed in the mass body are provided with independent locking holes for each locking hole. A steering vibration suppression device for a vehicle, characterized in that each tip of a columnar elastic body is fitted, and a buffer protrusion that protrudes outward from the mass body is integrally formed near the tip. .