JPH05118367A - Tubular vibro-isolating rubber - Google Patents

Abstract

PURPOSE:To provide a tubular vibro-isolating rubber wherein side stoppers are prevented from coming off by eliminating necessity for an adhesion process. CONSTITUTION:A rubber-state elastic material 3 is provided up to a part in the vicinity of both ends of an inner tube 1 longer than an outer tube 2, and a recessed part 7 or protruded part 14 is formed in a part or in the vicinity of this part where side stoppers 5 of the rubber-state elastic material 3 in the vicinity of both ends of the inner tube 1 are fitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber vibration isolator such as an engine mount and a suspension bush.

[0002]

2. Description of the Related Art Rubber side stoppers are attached to both ends of an inner cylinder of a cylindrical vibration-proof rubber having a rubber-like elastic body provided between a long inner cylinder and a short outer cylinder. The anti-vibration rubber manufacturer delivers the anti-vibration rubber with side stoppers to the vehicle manufacturer.
At this time, the side stopper might fall off. Therefore, in the case of a rubber side stopper, make the hole diameter slightly smaller than the outer diameter of the inner cylinder and insert both ends of the inner cylinder into this hole, or increase the wall thickness near the hole of the side stopper. It was designed to prevent the side stoppers fitted on both ends of the inner cylinder from falling off. However, with such a device, there is no risk of the side stopper falling off, and therefore the side stopper is fixed with an adhesive.

[0003]

However, the method of fixing the side stopper to the inner cylinder with an adhesive agent increases the number of steps and increases the cost.

Therefore, an object of the present invention is to provide a tubular vibration-proof rubber which does not require a bonding step and prevents the side stopper from falling off.

[0005]

In order to achieve the above-mentioned object, the present invention is a cylindrical vibration-proof rubber having a rubber-like elastic body provided between an inner cylinder and an outer cylinder. A rubber-like elastic body is provided up to the vicinity of both ends of the cylinder, and a concave portion or a convex portion is formed near the both ends of the inner cylinder where the side stoppers of the rubber-like elastic body are fitted or in the vicinity thereof.

[0006]

According to the present invention, the side stoppers are fitted into the concave portions or the convex portions formed at the rubber-like elastic body portions near both ends of the inner cylinder, so that the side stoppers can be installed by the time the tubular vibration-proof rubber is mounted on the vehicle. It is prevented from falling off. Moreover, the side stoppers are simply fitted into the rubber-like elastic body portions near both ends of the inner side, and the bonding step is unnecessary.

[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 embodiment shown in FIG. 1, a rubber-like elastic body 3 is provided between the inner cylinder 1 and the outer cylinder 2, and the rubber-like elastic body 3 extends to the vicinity of both ends of the inner cylinder 1 longer than the outer cylinder 2. Is provided, and the convex portion 4 is formed at the location of the rubber-like elastic body 3 near both ends of the inner cylinder 1. The side stoppers 5 are fitted from both ends of the inner cylinder 1, and when the side stoppers 5 are pushed over the convex portions 4 and fitted inside, the convex portions 4 prevent the side stoppers 5 from coming off. 2 shows the shape of the convex portion 4 shown in FIG. 1. In this embodiment, the convex portion 4 is formed in a brim shape along the outer circumference of the inner cylinder 1, but the convex portion 4 is formed on the outer circumference of the inner cylinder 1. It may not be provided all over, but may be partially formed.

In the embodiment shown in FIG. 3, only one convex portion 4 is formed, a hole 6 of the side stopper 5 is formed in a shape corresponding to the shape of the convex portion 4, and the convex portion 4 of the hole 6 is formed. The portion corresponding to is fitted into the convex portion 4 and the side stopper 5 is rotated when the convex portion 4 comes to the outside of the side stopper 5, so that the side stopper 5 is prevented from falling off.

In the embodiment shown in FIG. 4, a recess 7 is formed in the rubber-like elastic body 3 near both ends of the inner cylinder 1, and a side stopper 5 is fitted into the recess 7.

In another embodiment shown in FIG. 5, a ridge 8 is formed on the inner peripheral surface of the hole 6 of the side stopper 5, and a recess 7 into which the ridge 8 is fitted is formed in the rubber-like elastic body 3. Show things.

The side stopper 5 is usually formed of a rubber material, but a hard plastic material or the like may be used.
Since the place where the convex portion 4 and the concave portion 7 are formed is the rubber-like elastic body 3, even if the side stopper 5 has rigidity, the rubber-like elastic body 3 is deformed and therefore the side stopper 5 is deformed.
Is easily fitted into the convex portion 4 or the concave portion 7. The convex portion 4 and the concave portion 7 can be easily formed when the rubber-like elastic body 3 is vulcanized, and is easier than processing the inner cylinder 2.

[0013]

As described above, in the present invention, the rubber-like elastic body is provided up to the vicinity of both ends of the inner cylinder, and the concave portion or the convex portion is formed at the portion where the side stopper is fitted or in the vicinity thereof. If the side stoppers are fitted into the concave or convex portions at both ends of the inner cylinder, the side stoppers can be prevented from falling off without bonding. Further, the bonding step is unnecessary, workability is excellent, and cost can be reduced. Furthermore, since the concave portion or the convex portion is formed at the location of the rubber-like elastic body, even if the side stopper is rigid, it can be easily fitted.

[Brief description of drawings]

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

FIG. 2 is a perspective view of the inner cylinder end portion side shown in FIG.

FIG. 3 is a perspective view showing another embodiment.

FIG. 4 is a sectional view showing still another embodiment.

FIG. 5 is a sectional view showing an embodiment in which a ridge is formed on the side stopper side.

[Explanation of symbols]

 1 Inner Cylinder 2 Outer Cylinder 3 Rubber Elastic 4 Convex 5 Side Stopper 7 Recess

Claims (1)

[Claims] 1. A tubular anti-vibration rubber in which a rubber-like elastic body is provided between an inner cylinder and an outer cylinder, wherein the rubber-like elastic body is provided up to near both ends of the inner cylinder longer than the outer cylinder, and near both ends of the inner cylinder. 2. A cylindrical vibration-proof rubber, characterized in that a concave portion or a convex portion is formed at or near a place where the side stopper of the rubber-like elastic body is fitted.