JPH074459A - Cylindrical vibration control rubber and vibration control device - Google Patents

Abstract

PURPOSE:To prevent the entry of foreign matters between an outer tube and a rubber form elastic body. CONSTITUTION:In a cylindrical vibration proof rubber made by installing a rubber form elastic body 3 between an inner tube 1 and an outer tube 2, a recess 4 to fix the outer tube 2 is formed on the outer peripheral surface of the rubber form elastic body 3, a flange 5 to which both ends of the outer tube 2 are contacted is formed on the peripheral surfaces of both ends in the axial direction of the recess 4, hollows 6 are formed at the positions of the outer sides of both ends in the axial direction of the recess 4 and along the peripheral surface of the rubber form elastic body 3, and projections 7 to fix to the hollows 6 are formed on the outer tube 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical vibration-proof rubber in which a rubber-like elastic body is mounted between a cylinder and an outer cylinder, and an automobile stabilizer link rod, suspension rod, engine torque rod, etc. using the same. Vibration control device.

[0002]

2. Description of the Related Art As shown in FIG. 10, a conventional one of this type has a rubber-like elastic body 1 between an inner cylinder 100 and an outer cylinder 101.
I wear 02. 2 rods like this
The one connected by 3 is used as a suspension rod or the like. As shown in FIG. 11, the rubber-like elastic body 102 fixed to the outer circumference of the inner cylinder 100 by vulcanization adhesion or the like is an outer cylinder 101.
Is formed in the center of the outer peripheral surface, and flange portions 105 are formed on both end peripheral surfaces of the concave portion 104. The flange portions 105 cover both peripheral surfaces of the outer cylinder 101. The flange portion 105 is formed if the flange portion 105 is not provided as shown in FIG. 12 when it is attached to the attachment fitting 106 with the bolt 107.
This is because when a force in the direction of the arrow A acts, both ends of the outer cylinder 101 may collide with the mounting metal fitting 106 or may be rubbed and damaged. In particular, the outer cylinder 101 and the rod 10
In the case of integrally molding 3 and 3 from a synthetic resin material,
The flange portion 105 is indispensable.

[0003]

In the prior art, foreign matter such as earth and sand or dust easily enters between the outer cylinder 101 and the rubber-like elastic body 102, and the anti-vibration is performed with such foreign matter interposed therebetween. When an excessive force is input to the device, the resin outer cylinder 10
1 may be worn by foreign matter, and there is a problem that backlash occurs between the outer cylinder 101 and the rubber-like elastic body 102. In particular, it was easy for dirt and sand to enter the stabilizer link rods and suspension rods for automobiles. If foreign matter enters and looseness occurs between the outer cylinder 101 and the rubber-like elastic body 102, the anti-vibration function is impaired.

Therefore, an object of the present invention is to provide a cylindrical vibration-proof rubber and a vibration-proof device which prevent foreign matter from entering between the outer cylinder and the rubber-like elastic body.

[0005]

In order to achieve the above object, the tubular vibration-proof rubber of the present invention is a tubular vibration-proof rubber in which a rubber-like elastic body is mounted between an inner cylinder and an outer cylinder. A recess is formed on the outer peripheral surface of the rubber-like elastic body into which the outer cylinder fits, and flanges at both ends of the outer cylinder are formed on the peripheral surfaces of both ends of this recess in the axial direction. A recess is formed on both outer sides in the direction and along the peripheral surface of the rubber-like elastic body, and a protrusion that fits into the recess is formed on the outer cylinder. Further, the vibration isolator of the present invention is one in which the above-described tubular vibration-proof rubber is connected by two rods, and the outer cylinder and the rod are integrally molded with a synthetic resin material.

[0006]

According to the present invention, the projection of the outer cylinder fits into the recess of the rubber-like elastic body, and the foreign matter cannot enter from the projection to the tip.

[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, a rubber-like elastic body 3 is mounted between an inner cylinder 1 and an outer cylinder 2, and the rubber-like elastic body 3 is attached.
A concave portion 4 into which the outer cylinder 2 is fitted is formed on the outer peripheral surface of the. Flange portions 5 with which both ends of the outer cylinder 2 are in contact are formed on both circumferential surfaces of the recessed portion 4 in the axial direction, and recesses 6 are formed on both sides of the recessed portion 4 in the axial direction and along the outer peripheral surface. There is. The outer cylinder 2 has a projection 7 that fits into this recess 6
Has been formed. Further, the two outer cylinders 2 of rubber vibration-proof rubber are connected by a rod 8, and the two outer cylinders 2 and the rod 8 are integrally molded from a synthetic resin material. FIG. 2 is a plan view of the vibration isolator, and clearly shows a state in which the circular recesses 6 are formed on both sides of the concave portion 4 of the rubber-like elastic body 3 in the axial direction. The outer cylinder 2 and the rod 8 are integrally formed by injection molding or the like, and a compression force is applied to the rubber-like elastic body 3 by injection pressure. The outer cylinder 2 and the rod 8 are separately molded integrally from a synthetic resin material, and the rubber-like elastic body 3 such as rubber vulcanized and bonded to the outer cylinder 2 is press-fitted to the outer peripheral surface of the inner cylinder 1. Is also good.

FIG. 3 shows the inner cylinder 1 and the rubber-like elastic body 3,
A concave portion 4 is formed on the outer peripheral surface of the rubber-like elastic body 3, and a recess 6 is formed along the peripheral surface of the rubber-like elastic body so as to extend outward on both sides in the axial direction of the concave portion 4. .

The second embodiment shown in FIG. 4 shows an example in which the shapes of the depression 6 and the projection 7 are changed. That is,
The projections 7 are formed in hook-like shapes projecting on both sides in the axial direction of the outer cylinder 2 and bent in the radial direction, and the recesses 6 are located on both sides of the recessed portion 4 of the rubber-like elastic body 3, as shown in FIG. The flange portion 5 is formed from the outer side to the inner side in the radial direction. In any of the embodiments described above, the two vibration damping rubber devices are applied to the vibration damping device in which two rods 8 are connected.
It is also possible to use a tubular vibration-proof rubber having a shape in which the rod 8 does not exist and a vibration-proof rubber is mounted between the inner cylinder 1 and the outer cylinder 2.

The embodiment shown in FIG. 6 shows an example in which the sizes of two cylindrical vibration-proof rubbers connected by the rod 8 are changed.

Another embodiment shown in FIG. 7 shows an example in which the tubular vibration-proof rubber is not a perfect circle but an ellipse, and the sizes of two tubular vibration-proof rubbers connected by a rod 8 are changed. Is.

The vibration-damping device shown in FIG. 8 is one in which one cylindrical vibration-damping rubber has a quadrangular planar shape and the other cylindrical vibration-damping rubber has a perfect circular shape.

The vibration isolator shown in FIG. 9 shows a shape in which the rod 8 is bent not at a straight line but at both ends.

[0015]

As described above, according to the tubular vibration-proof rubber of the present invention, since the projection formed on the outer cylinder fits into the recess formed in the rubber-like elastic body, the outer cylinder and the rubber can be prevented. Even if a foreign matter is inserted between the elastic body and the elastic body, it is blocked by the protrusion and the recess. Therefore, foreign matter does not enter between the concave portion and the outer cylinder to cause play between them, and the vibration-proof function is not impaired. In addition, in the case where the outer cylinder is molded from a synthetic resin material, the manufacturing can be facilitated by injection molding and the weight can be reduced. Further, according to the vibration isolator of the present invention, the outer cylinder and the rod are integrally molded from the synthetic resin material, the manufacturing is easy, the weight is reduced, and the entry of foreign matter can be prevented.

[Brief description of drawings]

FIG. 1 is a front view of a tubular anti-vibration rubber showing a first embodiment of the present invention with a half cross section.

FIG. 2 is a plan view of FIG.

FIG. 3 is a cross-sectional view showing an inner cylinder and a rubber-like elastic body.

FIG. 4 is a sectional view showing a second embodiment.

FIG. 5 is a sectional view showing an inner cylinder and a rubber-like elastic body in the second embodiment.

FIG. 6 is a plan view showing an example of a vibration isolation device.

FIG. 7 is a plan view showing another example of the vibration isolator.

FIG. 8 is a plan view showing still another example of a vibration isolation device.

FIG. 9 is a plan view showing another example of a vibration isolation device.

FIG. 10 is a front view in which a portion of a tubular vibration-proof rubber showing a conventional example is shown in a half section.

FIG. 11 is a sectional view showing an inner cylinder and a rubber-like elastic body of a conventional example.

FIG. 12 is a cross-sectional view for explaining an inconvenience in a state where a vibration isolation device having no flange portion is attached.

[Explanation of symbols]

 1 Inner cylinder 2 Outer cylinder 3 Rubber-like elastic body 4 Recessed part 5 Flange part 6 Recess 7 Protrusion 8 Rod

Claims (3)

[Claims] 1. A tubular vibration-proof rubber in which a rubber-like elastic body is mounted between an inner cylinder and an outer cylinder, wherein a concave portion into which the outer cylinder fits is formed on an outer peripheral surface of the rubber-like elastic body, Flanges are formed on both circumferential surfaces of the recess in the axial direction so that both ends of the outer cylinder come into contact, and recesses are formed on both sides of the recess in the axial direction and along the circumferential surface of the rubber-like elastic body. , A cylindrical vibration-proof rubber having a protrusion formed on the outer cylinder so as to fit in the recess. 2. The cylindrical anti-vibration rubber according to claim 1, wherein the outer cylinder is molded from a synthetic resin material. 3. A vibration damping device, characterized in that the two outer cylinders of the rubber vibration isolator according to claim 1 are connected by a rod, and the two outer cylinders and the rod are integrally molded from a synthetic resin material. .