JPH0557468U - Cylindrical anti-vibration device - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a tubular vibration-damping device which can prevent the stopper rubber plate from being detached from the device body and can contribute to improvement in workability during manufacturing. According to the present invention, a rubber vibration isolator 20 having a support cylinder 22 in a central portion thereof and a cylindrical body 2 covering the outer periphery of the rubber vibration isolator 20 are provided.
4, 26 and a stopper rubber plate 28 arranged on the side surfaces of the cylindrical bodies 24, 26 with the support cylinder 22 penetrating the central portion.
In the cylindrical vibration isolator 10 having the above, the elastic retaining portion 12 is provided on the outer peripheral portion of the support cylinder 22 projecting outward from the stopper rubber plate 28. With this configuration, it is possible to prevent the stopper rubber plate 28 from coming off the apparatus body and improve workability during manufacturing.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a cylindrical vibration damping device, and more particularly to a cylindrical vibration damping device used for an engine mount of an automobile.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, as shown in FIGS. 6 and 7, there is known a cylindrical vibration isolator used for an engine mount of an automobile.

A cylindrical vibration damping device 50 shown in the figure penetrates a vibration damping rubber 20 having a cylindrical shape and a fan-shaped protrusion integrally formed at a position facing the outer periphery thereof, and a central portion of the vibration damping rubber 20. A support cylinder 22 for mounting a mounting member on the engine side (not shown) inserted in the state, an inner cylinder 24 surrounding the axial outer periphery of the vibration isolating rubber 20, and an inner cylinder 24 integral with the vibration isolating rubber 20, and the inner cylinder 24. An outer cylinder 26 for supporting, a disc-shaped stopper rubber plate 28 attached to the support cylinder 22 with an adhesive S, and a support bracket 30 for supporting the outer peripheral portion of the outer cylinder 26 are provided. ing.

As shown in FIG. 7, the stopper rubber plate 28 has a hole 28 formed in the center of the support cylinder 22 in a state where an adhesive S is applied to a part of the outer circumference of the support cylinder 22. It is attached to the support cylinder 22 by press-fitting a and hardening the adhesive S.

The outer diameter of the stopper rubber plate 28 is formed to be equal to or slightly larger than the outer diameter of the outer cylinder 26, so that when the engine of the automobile vibrates in the front-rear direction, the vehicle body and the driver It is designed to absorb shocks and noise to the environment.

It is to be noted that the adhesive S is applied to a part of the outer periphery of the support cylinder 22 and the stopper rubber plate 28 is attached to the support cylinder 22 after the cylindrical vibration isolator 50 is manufactured and is actually incorporated in an automobile. This is because the stopper rubber plate 28 is prevented from coming off before it is opened, and the function of the stopper rubber plate 28 is effectively exhibited when the vehicle is running.

The support bracket 30 includes a substantially L-shaped support member 32 formed by bending a first vertical support portion 32a and fixed to a vehicle body side of an automobile with a bolt or the like, and the first vertical support portion. The first vertical support portion 32a is provided upright from the support member 32 at the rear position of 32a, and the second vertical support portion 34 is provided in parallel with the first vertical support portion 32a. A semi-circular recess 38 corresponding to the outer diameter of the outer cylinder 26 is formed in the first and second vertical support portions 32a, 34, and the semi-circular recess 38 is joined to the outer circumference of the outer cylinder 26. Then, they are integrally fixed by welding.

[0008]

[Problems to be solved by the device]

 However, in the case of the conventional cylindrical vibration isolator 50 having the above-described structure, when the stopper rubber plate 28 is attached, the work of applying the adhesive S and the work of press-fitting the stopper rubber plate 28 into the support cylinder 22 are essential. Therefore, there is a problem that the number of work steps increases, the work is complicated and the workability is deteriorated.

Therefore, an object of the present invention is to provide a tubular vibration-damping device which can prevent the stopper rubber plate from being detached from the device body and can contribute to improvement of workability during manufacturing. It is a thing.

[0010]

[Means for Solving the Problems]

 The present invention provides a vibration-proof rubber having a support cylinder in the center, a cylinder covering the outer periphery of the vibration-proof rubber, and a stopper rubber plate arranged on the side surface of the cylinder with the support cylinder penetrating the center. In the cylindrical vibration isolator having, a resilient retaining portion is provided on an outer peripheral portion of a support cylinder protruding outward from the stopper rubber plate.

[0011]

According to the tubular vibration-damping device having the above-described configuration, since the elastic retainer is provided on the outer peripheral portion of the support cylinder protruding outward from the stopper rubber plate, the stopper rubber is once provided. After the plate is placed on the side surface of the cylindrical body, the stopper rubber plate does not separate from the support cylinder due to the action of the retaining portion.

Further, when the stopper rubber plate is attached to the side surface of the cylindrical body, since the retaining portion has elasticity, the stopper rubber plate is compressed by the central portion of the stopper rubber plate and returns to its original state after the central portion has passed. Therefore, it is not necessary to use an adhesive as in the conventional example, and workability is improved.

[0013]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIG.

In the tubular vibration damping device 10 shown in the figure, those having the same functions as those of the conventional tubular vibration damping device 50 are designated by the same reference numerals.

This tubular vibration isolator 10 is also shown in FIG. 2 on the outer periphery of the region protruding outward from the stopper rubber plate 28 in the support cylinder 22 penetrating the central portion of the vibration isolating rubber 20. As described above, the rubber rib 12 having elasticity as the retaining portion is formed by vulcanization.

The rib 12 covers the end region of the support cylinder 22 with rubber when the vibration-proof rubber 20 is integrally attached to the support cylinder 22, and is integrally formed on the outer periphery of the support cylinder 22 by rubber vulcanization. It will be transformed.

In order to mount the stopper rubber plate 28 on the side surface of the cylindrical body composed of the inner cylinder 24 and the outer cylinder 26, as shown in FIG. 3, a hole 28 a provided at the center of the stopper rubber plate 28 is formed. The hole 28a is pressed into the support cylinder 22 by displacing it in the direction of arrow A from the side of the support cylinder 22. At this time, since the rib 12 is compressed at the inner peripheral portion of the hole 28a and returns to the original state after passing through the hole 28a, a simple one-step process is performed without using an adhesive unlike the conventional example. The stopper rubber plate 28 can be attached to the side surfaces of the inner cylinder 24 and the outer cylinder 26 only by pushing. Then, once the stopper rubber plate 28 is attached, the rib 12 does not become an obstacle and the stopper rubber plate 28 does not come off from the support cylinder 22.

FIGS. 4 and 5 show a modified example of the present invention. First, as shown in FIG. 4, after the stopper rubber plate 28 is attached to the side surfaces of the inner cylinder 24 and the outer cylinder 26, As shown in FIG. 5, ribs 12 are formed on the outer peripheral region of the support cylinder 22 protruding outward from the stopper rubber plate 28 by a rubber vulcanization method.

Also in this case, the rib 12 does not become an obstacle and the stopper rubber plate 28 does not separate from the support cylinder 22 as in the case described above.

The present invention can be variously modified within the scope of the invention in addition to the above-described embodiments.

[0021]

[Effect of the device]

 According to the present invention described in detail above, since it has the above-mentioned configuration, it is possible to prevent the stopper rubber plate from coming off without using an adhesive and to improve the workability during manufacturing. A device can be provided.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of an apparatus according to an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of a main part of the embodiment apparatus of the present invention.

FIG. 3 is a partially cutaway side view showing a mounted state of a stopper rubber plate in the device according to the embodiment of the present invention.

FIG. 4 is a partially cutaway side view showing a modified example of the embodiment device of the present invention.

FIG. 5 is a partially cutaway side view showing a modified example of the embodiment apparatus of the present invention.

FIG. 6 is a partially cutaway perspective view of a conventional device.

FIG. 7 is a partially cutaway side view of a main part of a conventional device.

[Explanation of symbols]

 10 Cylindrical Vibration Isolator 12 Rib 20 Vibration Isolation Rubber 22 Support Tube 28 Stopper Rubber Plate

Claims (1)

[Scope of utility model registration request] 1. A vibration-proof rubber having a support cylinder in the center, a cylinder covering the outer periphery of the vibration-proof rubber, and a stopper rubber arranged on the side surface of the cylinder so that the support cylinder penetrates the center. A cylindrical vibration isolator having a plate, wherein a retaining portion having elasticity is provided on an outer peripheral portion of a support cylinder protruding outward from the stopper rubber plate.