JPS6228537A - Vibration-proof rubber - Google Patents

Abstract

PURPOSE:To change load characteristic in a desired direction by disposing a high damping ability material at an opening formed on a rubber. CONSTITUTION:A vibration-proof rubber comprises a metallic outer cylinder 1, a metallic inner cylinder 2 and a rubber body 3 disposed therebetween. An opening portion 51 having suitable outlines symmetrical about a diameter passing the center of the metallic inner cylinder 2 in direction of an arrow X is bored in the the rubber body 3, and a high damping ability material or a low repulsive elasticity material is embedded in the opening portion 51. Thus, load characteristic in the arrow X direction can be changed.

Description

[Detailed description of the invention] Aim of industrial development 1 field TECHNICAL FIELD This invention relates generally to anti-vibration rubber.

``To the Flame Tendon'' Traditionally, vibration-proof rubber, for example, rubber bushings, are usually constructed from a single rubber material in order to provide equal vibration damping performance in all directions, but in certain cases In order to achieve the desired damping performance in the desired direction, the damping performance in the desired specific direction can be achieved by creating a hollow shape in the rubber body in that specific direction or by cutting out the material. Selecting a specific performance. In this case, when a rubber material having particularly high damping performance is used as the rubber material, it is common to make the entire structure from this single material. That is, FIG. 5 of the attached drawings shows an example of a conventional rubber bushing made from such a single rubber material. The cylinder 3 shows the rubber body held by these metal cylinders 1 and 2. In addition, FIG.
For example, in order to increase the deflection in the direction of arrow This shows an example in which a cavity 4 having a suitable contour is provided.

However, since high damping capacity materials generally have a low impact modulus, once deformed,
There are problems in that it takes time to recover to the original shape and position, and that large permanent deformations tend to remain in the rubber body 3. Therefore, when such a high damping material is used as a material, for example, a rubber bushing is used in a pin joint of a link mechanism, if such a phenomenon occurs at the flat part of the pin joint of the link mechanism,
In addition to causing delays and play in the transmission of force and motion in the link mechanism, it also changes the load characteristics in directions where it is unnecessary to modify the load characteristics.
Various hindrances are often experienced.

Therefore, an object of the present invention is to obtain a new vibration-proof rubber that can solve these problems that occur in vibration-proof rubbers using high-damping materials.

In order to achieve this objective, the present invention, as shown in FIG. An opening 51 having an appropriate contour is provided in the rubber body 3, and this frontage 51
It is characterized by having a high attenuation material 5 embedded therein. In this case, it is also possible to additionally provide a cavity 6 with an appropriate contour in the rubber body 3 in the same direction.

Since the present invention has the above-described configuration, for example, the rubber body 3 can be deflected more in the direction of the arrow X than in other directions.

E-1-9 Hereinafter, the present invention will be explained in detail based on FIGS. 1 to 4 of the accompanying drawings showing embodiments thereof.

First, Figures 1 and 2 show an embodiment of the present invention, in which the present invention is implemented as a rubber bush for a link-type bottle joint constructed by interconnecting two links via a pin joint. However, in this embodiment, as in the case of the conventional rubber bushing shown in FIGS. 1 and 2, a metal outer cylinder 1, a metal inner cylinder 2, and a It is assumed that this rubber bushing is particularly required to have a load characteristic such as to have a large deflection in the direction indicated by the arrow X in FIG. 1, and in order to satisfy this requirement, , first and second
As shown in the figure, an opening 5. in the rubber body 3 has a suitable contour symmetrically with respect to the diameter passing through the center of the metal inner cylinder 2 in the direction of this arrow X. A high damping capacity material or a low rebound modulus material, such as a special rubber having such performance, is cast or embedded inside the opening 51. In addition, in FIG. 2, such a high damping capacity material 5
In order to prevent it from escaping from the opening 51, the high damping material 5 is made to protrude slightly from the thickness of the rubber body 3, and the outline of this protrusion is shaped into an enlarged part 5□ larger than the outline of the opening 51. This shows the state in which

Further, FIGS. 3 and 4 show another embodiment of the present invention, in which an opening 5 is provided in the rubber body 3 as shown in FIGS. 1 and 2.
In addition to casting or embedding a high damping capacity material or a low rebound modulus material 5 inside the arrow
This shows an example in which a hollow portion 6 having an appropriate profile is additionally provided symmetrically with respect to the diameter in this direction passing through the center of the inner cylinder 2 by exposing the metal inner cylinder 2 in this direction. . Therefore, in this embodiment, in addition to the high damping material 5 embedded in the rubber body 3, the presence of the cavity 6 formed therein makes the deflection of the rubber bushing in the direction of the arrow X even larger. can do. In addition, in this embodiment, the opening 5 made in the rubber body 3. As shown in FIG. 4, a narrowed portion 53 is formed near the surface of the rubber body 3, and this narrowed portion 53 prevents the high damping material 5 from falling off from the opening 51. That's what I do.

Since the present invention has the above configuration, the load characteristics in the direction of the arrow X of the rubber body 3 of the vibration isolating rubber, for example, a rubber bushing, can be adjusted by adding the high damping capacity material 5 in the rubber body 3. The desired result can be obtained by embedding it alone (Figs. 1 and 2), or by providing a cavity 7 in addition to it (Figs. 3 and 4). In this case,
In other directions, the properties of the rubber body 3 can be maintained as they are.

INDUSTRIAL APPLICABILITY The present invention has the above-described structure and function, and therefore can be applied to vibration-proof rubbers, such as rubber bushings, using high damping capacity materials or low impact modulus materials. It is therefore possible to change the load characteristics in one direction without affecting the load characteristics in other directions, and thus the present invention is useful, for example, for a joint part for an arm of a vehicle suspension system for an automobile. The present invention provides a suitable rubber bushing.

[Brief explanation of drawings]

FIG. 1 is a plan view showing one embodiment of the present invention, FIG. 2 is a vertical cross-sectional view taken along line If-If, FIG. 3 is a plan view showing another embodiment of the present invention, and FIG. is a longitudinal sectional view taken along line IV-IV. 1.2...Metal cylinder, 3...Rubber body, 5...High damping capacity material, 5...Opening part, 5□...Enlarged part, 53
... Narrowed part, 6... Cavity part.

Claims (1)

[Claims] 1. When it is necessary to modify the load characteristics in a certain direction in a vibration isolating rubber, an opening with an appropriate contour is provided in the rubber body in this direction; A vibration isolating rubber characterized by arranging a high damping capacity material or a low rebound modulus material therein. 2. Casting high damping material etc. into the opening of the rubber body,
Alternatively, the vibration isolating rubber according to claim 1 is arranged by embedding or the like. 3. The vibration isolating rubber according to claim 1 or 2, wherein in addition to the opening, a cavity is provided in the rubber body in the load correction direction. 4. The anti-vibration rubber according to claim 1, 2 or 3, wherein the anti-vibration rubber is in the shape of a rubber bush consisting of an inner and outer metal cylinder and a rubber body disposed between them.