JPH05118366A - Tubular vibro-isolating rubber - Google Patents

Abstract

PURPOSE:To provide a tubular vibro-isolating rubber wherein the rubber of equal structure can be used in various uses and further a characteristic can be changed. CONSTITUTION:Two or more inner tubes 2, 3 are provided in a single outer tube 1 to connect the outer tube 1 to the inner tubes 2, 3 by a rubber-state elastic material 4, and a through hole 5 is formed in the rubber-state elastic material 4 between at least the opposed inner tubes 2, 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical anti-vibration rubber used for engine mounts, suspension bushes and the like.

[0002]

2. Description of the Related Art As a conventional tubular vibration-proof rubber of this type,
As shown in FIG. 13 and FIG.
It is known that one inner cylinder 101 is provided, the outer cylinder 100 and the inner cylinder 101 are connected by a rubber-like elastic body 102, and the through holes 103 to 106 are formed in the rubber-like elastic body 102. The shape of these through holes 103 to 106 is AT (automatic shift).
Cars, MT (manual transmission) cars, 4-cylinder cars, and 6-cylinder cars were all different.

[0003]

In the conventional cylindrical rubber vibration isolator, since the through holes 103 to 106 have different shapes,
The products could not be shared, and the spring characteristics could not be changed with the through holes having the same shape.

Therefore, even a cylindrical anti-vibration rubber having the same structure can be commonly used for MT, AT, 4-cylinder, and 6-cylinder depending on how to set at the time of mounting. An object of the present invention is to provide a cylindrical vibration-proof rubber whose spring characteristics can be freely changed.

[0005]

In order to achieve the above object, the present invention provides two or more inner cylinders in one outer cylinder and connects the outer cylinder and the inner cylinder with a rubber-like elastic body. At least a through hole is formed in the rubber-like elastic body between the inner cylinders facing each other.

[0006]

According to the present invention, by changing the distance between two or more inner cylinders at the time of mounting, different spring characteristics can be exhibited even with the same structure and even with one structure. It can be used for both MT, AT, 4-cylinder, and 6-cylinder.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

In the first embodiment shown in FIG. 1, one outer cylinder 1
Two inner cylinders 2 and 3 are provided inside, and the outer cylinder 1 and the inner cylinder 2 and the outer cylinder 1 and the inner cylinder 3 are connected by the rubber-like elastic body 4, and the rubber-like elasticity between the opposing inner cylinders 2 and 3 is provided. Through holes 5 are formed in the body 4. Further, a through hole 6 is formed between the inner cylinder 2 and the outer cylinder 1, and a through hole 7 is also formed between the inner cylinder 3 and the outer cylinder 1.

The second embodiment shown in FIG. 2 shows an example in which the upper and lower through holes 6 and 7 are formed large and the stopper portions 4'made of a rubber-like elastic body are formed on the upper and lower sides of the two inner cylinders 2. When the engine or the like is attached to the inner cylinders 2 and 3 in a state in which the rubber-like elastic bodies 4 are in close contact with each other so that a through hole 5 between them is not formed, a load-deflection characteristic as shown in the graph of FIG. Indicates. As shown in FIG. 4, when the clearance between the through holes 5 is widened and the inner cylinders 2 and 3 are widened to mount an engine or the like on the inner cylinders 2 and 3, the load as shown in the graph of FIG. Deflection characteristics are shown.

FIG. 6 shows an example in which the engine 9 is attached to the vehicle body 8 through this tubular vibration-proof rubber, and a long hole 11 is formed in a fitting 10 on the engine 9 side. The cylinders 2 and 3 are attached so that the distance between them is kept at a desired value. The outer cylinder 1 is press-fitted into the bracket 12 and fixed to the vehicle body 8 side.

In the third embodiment shown in FIG. 7, the through holes 6 and 7 are provided.
The inner cylinders 2, 3 in this state are shown by changing the shape of
When it is attached to an engine or the like while keeping the interval, the load-deflection characteristics shown in the graph of FIG. 8 are exhibited. In this case, set at the time of mounting so that the spaces a and b are opened vertically.

In FIG. 9, the intervals a and b shown in FIG. 7 are eliminated, in other words, the intervals between the inner cylinders 2 and 3 are set to the maximum extent, and the load-deflection characteristics in this state are shown in the graph of FIG. Like Even with the cylindrical vibration-proof rubber having the same structure, the characteristics can be made different as shown in FIGS. 8 and 10 by changing the distance between the inner cylinders 2 and 3 to mount them.

In the fourth embodiment shown in FIG. 11, the outer cylinder 1 is not an integral cylindrical metal fitting, but an outer cylinder 1 divided into two semicircular shapes.
The outer cylinders 1A and 1B are provided with inner cylinders 2 and 3 via rubber-like elastic bodies 4 in the outer cylinders 1A and 1B, respectively, and through holes 6 and 7 are also formed. A through hole 5 is formed at a portion facing each other when these two members are combined. In this embodiment, the outer cylinder 1 is formed of two outer cylinders 1A and 1B, but it may be formed of three or more.

A fifth embodiment shown in FIG. 12 shows an outer cylinder 1 provided with three inner cylinders 2, 3, 3 ', and a through hole is provided between the opposed inner cylinders 2, 3, 3'. 5 is formed, and through holes 6, 7 are also formed between the inner cylinders 2, 3, 3 ′ and the outer cylinder 1.

In any of the embodiments, the characteristics can be changed by adjusting the distance between two or more inner cylinders, and even if they have the same structure by adjusting the distance between the inner cylinders at the time of mounting. It can be used for various purposes. Further development, if one inner cylinder is fixedly attached and the other inner cylinder is controlled by a cylinder or the like according to running conditions, that is, a fixed inner cylinder and a variable inner cylinder on the cylinder side. It is also possible to reduce the gap between the inner cylinders when a high torque is applied to the engine, such as during a sudden start, and to widen the gap during idling, by changing the gap between the and.

[0016]

As described above, since the present invention has two or more inner cylinders, by adjusting the gap between the inner cylinders, one structure can be used for both MT and AT. Furthermore, it can be used for both four cylinders and six cylinders. Further, the characteristics can be freely changed by controlling the gap between the inner cylinders.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a sectional view showing a second embodiment.

FIG. 3 is a graph showing load-deflection characteristics of what is shown in FIG.

FIG. 4 is a cross-sectional view when the gap between the inner cylinders in FIG. 2 is widened for use.

5 is a graph showing load-deflection characteristics of the one shown in FIG.

FIG. 6 is a side view showing an example of attachment.

FIG. 7 is a sectional view showing a third embodiment.

FIG. 8 is a graph showing load-deflection characteristics of what is shown in FIG.

9 is a sectional view of the embodiment shown in FIG. 7 in a state where the distance between the inner cylinders is widened.

10 is a graph showing load-deflection characteristics in FIG.

FIG. 11 is a perspective view showing a fourth embodiment.

FIG. 12 is a sectional view showing a fifth embodiment.

FIG. 13 is a sectional view showing a conventional example.

FIG. 14 is a sectional view showing another conventional example.

[Explanation of symbols]

 1 Outer cylinder 2, 3, 3'Inner cylinder 4 Rubber-like elastic body 5 Through hole

Claims (1)

[Claims] 1. An outer cylinder is provided with two or more inner cylinders, the outer cylinder and the inner cylinder are connected by a rubber-like elastic body, and a through hole is formed in at least the rubber-like elastic body between the opposing inner cylinders. Cylindrical anti-vibration rubber characterized by