JP2001330080A - Vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a toe collect function by increasing the area of a toe collect part and improve maneuvering stability. SOLUTION: A rubber-form elastic body 3 is situated between inner and outer cylinders 1 and 2. A part of the inner and outer cylinders 1 and 2 is extended obliquely outwardly to form inclination parts 1A and 2A and a rubber- form body 3A is situated between the inclination parts 1A and 2A. In a so formed vibration control device, at the part extending to the outside, its free end part is formed larger than the side where a separate distance between the inner and outer cylinders 1 and 2 rises obliquely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rubber-like elastic member provided between an inner cylinder and an outer cylinder, and a part of the inner cylinder and the outer cylinder is extended obliquely outward, and the extended inclined portion is provided. The present invention relates to an anti-vibration device such as a collect bush in which a rubber-like elastic body is provided between the elastic members.

[0002]

2. Description of the Related Art A conventional anti-vibration device called a collect bush is used for an intermediate beam suspension, and as shown in FIGS. 3 and 4, an outer cylinder 2 which is press-fitted into a beam (not shown) and a body side. An inner cylinder 1 to be fastened is provided, and a rubber-like elastic body 3 is provided between the inner cylinder 1 and the outer cylinder 2. A part of the inner cylinder 1 and a part of the outer cylinder 2 extend obliquely outward, and a rubber-like elastic body 3A is provided between the parallel inclined parts 1A, 2A to constitute a toe-collect part. are doing.
The connecting portion of the inclined portion 1A with the inner cylinder 1 is connected by being bent upward in the drawing. That is, the end of the inclined portion 1A is orthogonal to the axis of the inner cylinder 1. If the length indicated by the symbol A is increased in order to increase the area of the to collect part, the to collect function is enhanced. In addition, as the thickness t of the toe-collecting portion is reduced, the compression and shear ratio of the toe-collecting portion are increased, which is effective for driving stability of the vehicle.

[0003]

When the length of the code A is increased, there is a limit in terms of durability, especially in terms of torsional space. Further, when the thickness t is reduced, the durability level in the front-rear direction is deteriorated.

Accordingly, an object of the present invention is to provide an anti-vibration device in which the area of the to collect part is increased to enhance the to collect function, and the thickness of the to collect part is reduced to improve the steering stability. I do.

[0005]

According to the present invention, a rubber-like elastic body is provided between an inner cylinder and an outer cylinder, and a part of the inner cylinder and the outer cylinder extend obliquely outward. In the vibration isolator provided with the rubber-like elastic body also provided between the inclined portions and the inclined portions, the separation distance between the inner cylinder and the outer cylinder rises obliquely in the portion extending outward. The free end is larger than the free end.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, a rubber-like elastic body 3 (preferably rubber vulcanized) is provided between an inner cylinder 1 and an outer cylinder 2 as in the prior art, and a part of the inner cylinder 1 and a part of the outer cylinder 2 are provided. Is extended obliquely outward, and a rubber-like elastic body 3A is provided between these inclined portions 1A and 2A to constitute a to collect portion. The inclined portions 1A and 2A are not formed parallel to each other as in the related art, and the separation distance between the inner cylinder 1 and the outer cylinder 2 is oblique in a portion extending outside the inner cylinder 1 and the outer cylinder 2. The free end is formed to be larger than the side (base end) that rises in the vertical direction, that is, the interval at the free end is larger than the interval at the base end between the inclined portions 1A and 2A. I have. In addition, the distance between the inner cylinder 1 and the outer cylinder 2 gradually increases as it extends outward, that is, as it approaches the free end.

Further, a vibration isolator (conventional example) in which the inclined portions 1A and 2A of the inner cylinder 1 and the outer cylinder 2 extending obliquely outward are parallel.
When the position in the axial direction of the position where the outer cylinder 2 rises obliquely is the same, the length of at least one inclined portion of the inner cylinder 1 and the outer cylinder 2 is increased. In the illustrated embodiment, the inclined portion 2A of the outer cylinder 2 is configured at the same position as in the related art, and the length of the inclined portion 1A of the inner cylinder 1 is longer than the length of the inclined portion 2A. By doing so, it is possible to reduce the thickness t _1, compressed as a result, it can be given the ratio of shear, even better steering stability.

Further, the inclination angles of the inclined portions 1A, 2A (conventional example) of the parallel inner cylinder 1 and the outer cylinder 2 and the center point of the inclined sections 1A, 2A of the inner cylinder 1 and the outer cylinder 2 which are separated from each other. The angle formed is substantially the same. Also, the inclined portion 1
The separation distance between the inner cylinder 1 and the outer cylinder 2 at the obliquely rising point was made smaller than the separation distance when A and 2A were parallel. That is, the interval between the base portions of the inclined portions 1A and 2A is made smaller than in the conventional case. Further, the sectional layer of the rubber-like elastic body 3A narrowed by the inclined portion 1A of the inner cylinder 1 and the inclined portion 2A of the outer cylinder 2 is larger than that in the case where the inclined portions 1A and 2A are parallel (conventional example). It is like that.

Regarding the proper range of the angle extending to the outside of the inner cylinder 1 and the outer cylinder 2, for example, the angle of the inner cylinder 1 is from 57 ° to 75 °, the angle of the outer cylinder 2 is from 52 ° to 25 °, If the width is smaller than that, it is difficult to make a difference from the conventional example, and if it is further opened, the to collect effect cannot be exerted. Table 1 below shows a conventional example and an example, where the angle is an angle as viewed from a right angle in the axial direction.

[0011]

[Table 1]

[0012] In an embodiment of the invention, the thickness _{t 1} is the thickness t
_{2 and the} thickness increases as the inclined portions 1A and 2A move outward, so that the torsional durability level does not decrease. Further, since the length indicated by the symbol A can be made larger than that of the related art, the area of the to collect portion can be increased.

The embodiment shown in FIG. 2 shows the inner cylinder 1 of the inclined portion 1A.
, I.e., the end 1A 'extends straight from the other part. Since the end portion 1A 'is straight, even if the inclined portions 1A and 2A are parallel to each other, the amount of the rubber-like elastic body 3A therebetween increases, and as a result, the area of the to collect portion can be increased.
Even when the inclined portions 1A and 2A are not parallel, the same configuration as the end portion 1A 'can be adopted.

[0014]

As described above, according to the present invention, the inclined portions are not parallel to each other, the thickness of the to collect portion is larger at the free end portion than at the base end portion, and the length of the toe correct portion is longer. By increasing the length and increasing the area, the toe correct function and the steering stability are improved. In addition, the torsion and the durability before and after are also improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a preferred embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment.

FIG. 3 is a sectional view of a conventional example.

FIG. 4 is an enlarged sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner cylinder 2 Outer cylinder 1A, 2A Inclined part 3, 3A Rubber-like elastic body

Claims (7)

[Claims] 1. A rubber-like elastic body is provided between an inner cylinder and an outer cylinder, and a part of the inner cylinder and the outer cylinder extends obliquely outward to form an inclined portion. In the vibration isolator provided with the elastic member, the free end of the portion extending outward is larger at the free end than at the side where the separation distance between the inner cylinder and the outer cylinder rises obliquely. apparatus. 2. The anti-vibration device according to claim 1, wherein the distance between the inclined portions increases as it extends outward. 3. A rubber-like elastic body is provided between the inner cylinder and the outer cylinder, and a part of the inner cylinder and the outer cylinder extends obliquely outward to form an inclined portion. In the vibration isolator provided with the elastic body, compared with the vibration isolator in which the inclined portion of the inner cylinder and the outer cylinder extending obliquely outward are parallel, An anti-vibration device having the same position, wherein the length of at least one inclined portion of the inner cylinder and the outer cylinder is increased. 4. An inclination angle of each of the parallel inclined portions and an inclination of the separated inner and outer cylinders as compared with a vibration isolator in which the inclined portions of the inner cylinder and the outer cylinder extending obliquely outward are parallel. 2. An angle formed at a center point of the portion is substantially the same.
Or 2 anti-vibration devices. 5. An inner cylinder extending obliquely outward and a slanted portion of the outer cylinder are parallel to each other. The vibration isolator according to any one of claims 1, 2 and 4, wherein a separation distance of the outer cylinder at a base end side of the inclined portion is small. 6. A cross-section layer of a rubber-like elastic material narrowed between non-parallel inclined portions, as compared with a vibration isolator in which inclined portions of an inner cylinder and an outer cylinder extending obliquely outward are parallel. Wherein the inner cylinder and the outer cylinder are larger than in a case where they are parallel.
5. The vibration damping device according to any one of 4. 7. A rubber-like elastic body is provided between the inner cylinder and the outer cylinder, and a part of the inner cylinder and the outer cylinder extends obliquely outward to form an inclined portion. In the vibration isolator provided with the elastic body, the inclined portion of the inner cylinder and the inclined portion of the outer cylinder extend substantially in parallel, and the end of the inclined portion of the inner cylinder connected to the inner cylinder extends straight. An anti-vibration device characterized by being connected to the inner cylinder through