JPH08226480A - Vibration control device - Google Patents

Abstract

PURPOSE: To provide a vibration control function, even if a heavy load is borne, and also increase durability. CONSTITUTION: In a vibration control device which has a rubber elastic body 3 mounted between an inner tube 1 and an outer tube 2, and has a through hole formed on both sides or on one side of the inner tube 1, a side stopper 11 which is formed in the shape to copy the form of the hole inside of the through hole, which has the same or more thickness in the radial direction of the through hole, and of which both ends are projected to the outside of the outer tube 2 is provided in one through hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator in which a rubber-like elastic body is mounted between an inner cylinder and an outer cylinder, and through holes are formed on both sides or one side with the inner cylinder interposed therebetween. The present invention relates to an anti-vibration device that can be suitably used as a mount.

[0002]

2. Description of the Related Art In a conventional engine mount, for example, an inner cylinder is mounted on a vehicle body through a mounting member, and an outer cylinder is press-fitted into a bracket mounted on an engine. With the vibration of the engine, the inner cylinder relatively moves in the axial direction. Along with the movement of the inner cylinder in the axial direction, the outer cylinder also tries to move in the direction of coming out of the rubber-like elastic body, and the outer cylinder collides with other devices or a mounting member that connects the vehicle body and the inner cylinder. To do. Therefore, in a vibration damping device in which the inner cylinder is longer than the outer cylinder, it is known that a disk-shaped side stopper having a larger diameter than the outer diameter of the outer cylinder is attached to the inner cylinder in the vicinity of both ends thereof.

[0003]

The conventional disk-shaped side stopper is not sufficient to prevent the outer cylinder from coming off, and it cannot receive a large load without its thickness.
When a load over a certain level was applied, the anti-vibration function almost disappeared, and durability was lacking.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vibration damping device which can exhibit a vibration damping function even when a large load is applied and has improved durability.

[0005]

In order to achieve the above-mentioned object, according to the present invention, a rubber-like elastic body is mounted between an inner cylinder and an outer cylinder, and the inner cylinder is sandwiched so as to penetrate to both sides or one side. In a vibration isolator having a hole formed in one of the through holes in a shape that follows the shape of the through hole, and has a thickness equal to or greater than the radial width of the through hole, and both ends are A side stopper protruding to the outer peripheral side of the outer cylinder is provided.

[0006]

The side stopper prevents the outer cylinder from slipping out of the rubber-like elastic body against a load or vibration in the axial direction, and the side stopper acts as a buffer even when the outer cylinder collides with other equipment. Also, the side stopper is prevented from slipping out of the through hole.

[0007]

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

The embodiment shown in FIGS. 1 and 2 shows a vibration isolator containing liquid, in which a rubber-like elastic body 3 is provided between an inner cylinder 1 and an outer cylinder 2.
And the through hole 4 is formed on one side of the inner cylinder 1, and the inner cylinder 1 and the outer cylinder 2 are arranged on parallel axes.
One is connected to a vehicle engine or the like which is a vibrating portion, and the other is connected to a vehicle body or the like which is a vibration receiving portion. An intermediate cylinder 5 is arranged between the inner cylinder 1 and the outer cylinder 2. Further, a diaphragm 6 is provided inside the outer cylinder 2, and a partition plate 7 is provided to partition the space surrounded by the diaphragm 6 and the rubber-like elastic body 3, and the partition plate 7 allows two liquid chambers 8 to be provided. , 9 are formed. In addition, the restricted passage 10 is formed,
The two liquid chambers 8 and 9 are in communication with each other. 1 is a cross-sectional view of the upper half of the inner cylinder 1 viewed from one end surface side, and FIG. 2 is a side cross-sectional view with FIG. 1 as the front surface. The through-hole 4 is formed in a shape that follows the shape of the through-hole 4 and has a thickness equal to or greater than the radial width of the through-hole 4, and both ends are the outer circumference of the outer cylinder 2. A side stopper 11 protruding to the side is provided. A gap is left at both ends in the circumferential direction of the through hole 4 provided with the side stoppers 11 (see both ends of the through hole 4 in FIG. 1). The shape that follows the shape of the through hole 4 is, as shown in FIG.
The shapes of the upper and lower surfaces of the side stopper 11 follow the surfaces of the intermediate cylinder 5 and the rubber-like elastic body 3 facing the inside of the hole. In this embodiment, one end side of the side stopper 11 in the axial direction is made to project to the outside from the outer circumference of the outer cylinder 2 to a large extent. This protrusion is indicated by reference numeral 11A. Further, in this embodiment, since the limiting connection 10 is formed on the outer periphery of the intermediate cylinder 5, the central portion in the axial direction of the intermediate cylinder 5 is recessed inward, and the through hole 4 is adjacent to the intermediate cylinder 5. Since the through hole 4 is provided, that is, the through hole 4 is formed narrower in the central portion in the axial direction than on both end sides, and the side stopper 11 is formed in a shape that follows the shape of the through hole 4 by making good use of this shape. This prevents the side stopper 11 from coming off in the axial direction.

In the liquid vibration isolator shown in FIGS. 1 and 2, when the inner cylinder 1 is attached to the vehicle body and the bracket attached to the engine is attached to the outer cylinder 2, the weight of the engine is removed from above in the drawings. When the cylinder 1 is actuated downward, the through hole 4 expands slightly in the radial direction. However, if the radial width of the side stopper 11 is made thicker than that in advance,
There is no gap between the side stopper 11 and the inner wall of the through hole 4, so that the side stopper 11 can be more reliably prevented from coming off in the axial direction. Further, in this case, since the rubber elastic body 3 is pre-compressed by the side stopper 11, the spring rises and the durability is also improved. From this state, when the outer cylinder 2 vertically vibrates due to the vibration of the engine or the like, the rubber-like elastic body 3 is deformed, the vibration is attenuated by this deformation, and the rubber-like elastic body 3 is sealed inside. The vibration is attenuated as the liquid flows between the liquid chambers 8 and 9. Further, the side stoppers 11 prevent the outer cylinder 2 from slipping out even with respect to vibrations in the axial direction, and both end sides of the side stoppers 11 serve as a cushioning function when colliding with other devices or members. Further, since both ends of the side stopper 11 itself are also formed so as to project toward the outer peripheral side of the outer cylinder, they will not come off. The inner cylinder 1 may be connected to the engine and the outer cylinder 2 may be connected to the vehicle body, contrary to the present embodiment (in that case, the state is upside down in FIG. 2).

The embodiment shown in FIGS. 3 and 4 shows a vibration isolator having a structure not containing a liquid, in which through holes 4 are formed on both sides with the inner cylinder 1 interposed therebetween. Two upper through-holes 4 are formed. Side stopper 11 in this embodiment
In addition to the large protruding portion 11A on one end side, a small protruding portion 11B is formed on the other end side. The protruding portion 11B on this side is protruded so as to substantially coincide with the outer circumference of the outer cylinder 2.

In another embodiment shown in FIGS. 5 and 6, the upper end side of the protruding portion 11A of the side stopper 11 is also made to protrude toward the inner cylinder 1 side, and the upper and lower parts at the other end side are respectively outside and inside the inner cylinder 1 side. It is projected to the cylinder 2 side.

Each of the side stoppers 11 is formed so as to have a thickness equal to or larger than the radial width of the through hole 4, and is provided in the through hole 4 in a press-fitted state.
Both ends of the side stopper 11 do not have to project to the outer circumference of the outer cylinder 2, but at least project to the outer circumference side.

[0013]

As described above, according to the present invention, one through hole is formed to have a shape that follows the shape of the through hole, and the thickness of the through hole is equal to or greater than the radial width of the through hole. It has a side stopper with both ends projecting to the outer circumference of the outer cylinder to prevent the side stopper from coming off the outer cylinder against axial load, and also has a cushioning function when it collides with other members. It works, and the side stopper itself does not come out.

[Brief description of drawings]

FIG. 1 is a front view showing a cross section of an upper half of a vibration damping device containing liquid.

FIG. 2 is a side sectional view of FIG.

FIG. 3 is a front view showing another embodiment.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a front view showing still another embodiment.

6 is a cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1 Inner cylinder 2 Outer cylinder 3 Rubber-like elastic body 4 Through hole 11 Side stopper

Claims (2)

[Claims] 1. A vibration-damping device in which a rubber-like elastic body is mounted between an inner cylinder and an outer cylinder, and a through hole is formed on both sides or one side of the inner cylinder so that one of the through holes has a through hole. In addition to being formed in a shape that follows the inner shape of the through hole, a side stopper having a thickness equal to or greater than the radial width of the through hole and having both ends protruding toward the outer cylinder outer peripheral side is provided. Anti-vibration device. 2. The vibration isolator according to claim 1, wherein at least one end of the side stopper in the axial direction projects outward from the outer circumference of the outer cylinder.