JPH08338465A - Vibration damper - Google Patents

Abstract

PURPOSE: To aim at a reduction in the number of part items and assembling manhours, and simultaneously to reduce the cost of production as well as to make it easily manufacturable. CONSTITUTION: This is a vibration damper that is equipped with an inner cylinder 1 to be connected to one side of a vibration generating part and a vibration receiving part, and outer cylinder 2 to be connected to the other side of both these generating and receiving parts, an elastic body 3 to lee interposed between the inner cylinder 1 and the outer cylinder 2, and a side stopper 4 to be installed in the axial outward of the outer cylinder 2 or the elastic body 3, this side stopper 4 is made up of bending a projection piece projected integrally with the elastic body 3 in the axial direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device suitable for mounting, for example, an automobile engine.

[0002]

2. Description of the Related Art For example, as a vibration isolator used when an automobile engine is mounted on a vehicle body, the one shown in FIGS. 7 and 8 is known. That is, this anti-vibration device
It is composed of an inner cylinder 100, an outer cylinder 101, and an elastic body 102 made of rubber provided between the inner cylinder 100 and the outer cylinder 101. Particularly, on the inner cylinder 100 side, a mating stopper metal fitting 103 is provided. The engine (not shown) side of the automobile is fixed via the outer cylinder 101 side, and the outer cylinder 101 side is fixed to the vehicle body (not shown) side via the body side bracket 104.

Further, such a vibration isolator is provided with a side stopper 105, and when the elastic body 102 made of rubber is displaced and the mating stopper metal fitting 103 comes into contact with the outer cylinder 101 or the body side bracket 104, There is known one configured to prevent generation of abnormal noise.

This side stopper is mainly made of rubber and formed in a plate shape, and is attached to the inner cylinder 100 from both sides. The side stopper is attached to the inner cylinder 100 by press fitting or bonding. It is done by agents.

[0005]

By the way, in such a side stopper, as the stopper member, it is necessary to manufacture the stopper members individually, and generally, two side stoppers are required. After the vibrating rubber is manufactured, it is necessary to assemble it in the assembly process. Therefore, as the number of parts increases, an extra assembling step is required, resulting in an increase in manufacturing cost.

In view of the above-mentioned circumstances, the present invention aims to provide a vibration isolation device which can reduce the number of parts and the number of assembling steps, reduce the manufacturing cost, and can be easily manufactured. It is what

[0007]

That is, according to the present invention, an inner cylinder connected to one of the vibration generating portion and the vibration receiving portion, and an outer cylinder connected to the other of the vibration generating portion and the vibration receiving portion,
A vibration isolator comprising an elastic body interposed between the inner cylinder and the outer cylinder and a side stopper arranged axially outward of the outer cylinder or the elastic body, wherein the side stopper is A projecting piece that integrally projects with the elastic body in the axial direction is bent in a direction substantially perpendicular to the shaft.

[0008]

That is, according to the present invention, the side stopper is formed by bending the projection piece provided integrally with the elastic body so as to project in the axial direction, and bending the projection in the direction perpendicular to the axis. It is possible to reduce the number of times, and there is no fear of falling off from the mounting portion.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic sectional view showing a vibration damping device according to the present invention. The vibration damping device of this embodiment includes an inner cylinder 1, an outer cylinder 2, an elastic body 3 made of rubber interposed between the inner and outer cylinders 1 and 2, and a side provided integrally with the elastic body 3. And a stopper 4.

The elastic body 3 functions as a vibration-proof rubber, and is vulcanized and molded between the inner and outer cylinders 1 and 2 using a predetermined mold to form the shape shown in FIGS. 2 and 3. It is designed to be used, and at the same time, the protruding piece 40 which will later become the side stopper 4 is also integrally molded. It should be noted that at the time of molding, it is preferable that the rubber material (the injection port and the injection path) of the molding die be directly used as the molding portion of the protruding piece 40. As a result, it is possible to use the portion (liner portion) corresponding to the injection path, which has been conventionally removed after molding, without wasting.

The side stopper 4 is formed by bending a protruding piece 40 formed together with the elastic body 3 in a direction substantially perpendicular to the central axis L. That is, as shown in FIG. 4, the projecting piece 40 of this embodiment is formed in a substantially cylindrical shape so that vulcanization can be easily realized, and at four conformal positions. The slit 41 is formed to have a petal shape.

As shown in FIG. 5, each petal-shaped portion 42 has
A recess 42A is provided along the outer peripheral surface direction so as to be easily bent outward. Furthermore, each petal-shaped portion 42 has a structure shown in FIG.
As shown in, the taper is provided so as to be inclined and expanded outward at a predetermined angle θ, so that the taper can be more easily bent outward. The inclination angle θ may be a small angle value (for example, about 1 to 2 degrees) that does not cause a problem when the mold is released from the mold.

Therefore, according to this embodiment, when the anti-vibration device vulcanized and formed as shown in FIG. 2 is assembled to predetermined mounting members 5 and 6, etc., as shown in FIG.
It naturally bends following the shape of the mounting member 5.

[0014]

As described above, according to the present invention, the side stopper is formed by bending the projection piece provided integrally with the elastic body so as to project in the axial direction, in a direction perpendicular to the axis, Since it is integrally formed, the number of steps and costs can be significantly reduced, and thereafter, during transportation, for example, there is no fear that it will fall off from the attachment part due to impact, etc. A device can be provided.

Further, according to the present invention, the stopper portion can be utilized as the injection hole, and the rubber loss in the conventional injection hole can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a mounted state of a vibration damping device according to the present invention.

FIG. 2 is a schematic sectional view showing a vibration damping device according to the present invention.

FIG. 3 is a plan view of the vibration isolator.

FIG. 4 is a perspective view of a main part of the apparatus.

FIG. 5 is a perspective view showing a main part of a side stopper according to the present invention.

FIG. 6 is a sectional view showing a main part of the side stopper.

FIG. 7 is a cross-sectional view of a conventional vibration damping device.

FIG. 8 is a plan view of the same.

[Explanation of symbols]

 1 Inner Cylinder 2 Outer Cylinder 3 Elastic Body 4 Side Stopper 40 Projecting Piece 41 Slit 42 Petal-like Part 42A Recess

Claims (1)

[Claims] 1. An inner cylinder connected to one of the vibration generator and the vibration receiver, an outer cylinder connected to the other of the vibration generator and the vibration receiver, and an inner cylinder and an outer cylinder. A vibration damping device comprising an elastic body interposed and a side stopper arranged axially outward of the outer cylinder or the elastic body, wherein the side stopper is axially integrated with the elastic body. An anti-vibration device, which is formed by bending a protruding piece protruding in a direction substantially perpendicular to the axis.