JPH1163059A - Vibration control equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To abolish a stopper as a separate metal fitting by providing a stopper integrally with a bracket in a position where both end sides of an inner cylinder clash with each other when the inner cylinder is moved by an amount more than a specified displacing amount in a diameter direction during bracket forming in a solution incorporated vibration control equipment. SOLUTION: One integrating an inner cylinder 1 and an elastic member 3 is set in a metallic mold, a resin material is injected into the metallic mold to form the outer cylindrical part 2B of a bracket 2 around the elastic member 3 and then an attaching part 2A is formed. A stopper 20 is integrally formed in the bracket 2 so as to be positioned in a place where both end sides of the inner cylinder 1 clash with each other when the inner cylinder 1 is moved by an amount more than a specified displacing amount in a diameter direction during the formation of the bracket 2. The clashing part of the inner cylinder 1 to the stopper 20, i.e., the shape of an upper surface part 20A, is formed in a shape corresponding to the shape of the inner cylinder 1. By forming the upper surface part 20A in the shape corresponding to the shape of the inner cylinder 1, the outer peripheral surface of the inner cylinder 1 is uniformly contacted with the upper surface part 20A during clashing with the inner cylinder 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has an inner cylinder connected to one of a vibration generating section and a vibration receiving section and a bracket serving as an outer cylinder connected to the other of the vibration generating section and the vibration receiving section. The present invention relates to a liquid-containing vibration isolator provided with an elastic body and having an internal space as a liquid chamber.

[0002]

2. Description of the Related Art A conventional liquid-containing vibration isolator is disclosed in
The thing described in 52043 gazette is known. As shown in FIGS. 4 and 5, this device has an inner cylinder 1 connected to one of a vibration generator and a vibration receiver and a resin bracket 2 serving as an outer cylinder connected to the other. An elastic body 3 is provided between the cylinder 1 and the bracket 2, and an inner section is a liquid chamber 4. For example, an engine (not shown) is mounted on the inner cylinder 1, the mounting portion 2 A of the bracket 2 is fixed to a vehicle body (not shown), and a part of the elastic body 3 is provided on the inner peripheral surface of the outer cylinder portion B of the bracket 2. It is provided to cover. A body in which the inner cylinder 1 and the elastic body 3 are integrated (for example, one obtained by vulcanizing and bonding rubber to the inner cylinder 1) is set in a mold, and a resin material is injected into the mold to surround the elastic body 3. The outer cylindrical portion 2B of the bracket 2 is formed at the same time as the mounting portion 2A. An opening 2C is formed in a part (the lower end side in the illustrated example) of the outer cylindrical portion 2B of the bracket 2 formed of a synthetic resin material, and components necessary for forming the liquid and liquid chambers 4 from the opening 2C. And the lid 5 is hermetically attached to the periphery 2D of the opening 2C. The components required to form the liquid chamber 4 are a partition member (orifice forming member) 6 and a diaphragm 7, and a limiting passage 8 is formed in the partition member 6. Liquid chambers are formed above and below the partition member 6, and the sealed liquid flows between the two chambers via the restriction passage 8. The flange portion 6A of the partition member 6 is in contact with a step portion 2E formed on the inner peripheral surface of the opening 2C so as to sandwich a part of the elastic body 3, and the peripheral edge of the diaphragm 7 is provided on one surface of the flange portion 6A. Be abutted. When the lid 5 is attached to the peripheral edge 2D of the opening 2C of the outer cylinder bracket 2B of the bracket 2, the step 2E
The lid 5 and the part of the elastic body 3 and the peripheral edges of the flange 6A and the diaphragm 7 are in a state of being narrowly pressed. A groove 2F is formed on the outer peripheral surface of a peripheral edge 2D of the opening 2C.
The outer peripheral edge of the lid portion 5 is caulked with respect to F, and the lid portion 5 is fixed to the outer peripheral portion 2B in a sealed state. Also, bracket 2
A stopper 9 having a U-shaped cross section is attached to the upper part of the outer cylinder bracket 2B as shown in FIG. A rubber plate 10 is attached between the stopper 9 and the upper surface of the outer peripheral portion 2B. When the inner cylinder 1 is lowered too low in FIG. 1, the stopper 9 comes into contact with the rubber plate 10 to prevent further effects.

[0003]

The conventional stopper 9 is as follows.
The inner cylinder 1 and the bracket 2 are made of metal fittings that are separate from each other, and also require a rubber plate 10, which inevitably increases the number of parts and the number of assembly steps. If there is not enough space above the bracket 2, such a stopper 9 cannot be attached.

Therefore, the present invention eliminates the stopper, which is a separate metal fitting, and reduces the number of parts and the number of assembling steps by integrally forming the stopper with the bracket. It is an object of the present invention to provide a vibration isolator that can be achieved.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises an inner cylinder connected to one of a vibration generator and a vibration receiver and a bracket serving as an outer cylinder connected to the other. Then, while providing an elastic body between the inner cylinder and the bracket, an integral body of the inner cylinder and the elastic body is set in a mold, and a resin material is injected into the mold to surround the elastic body. In a vibration isolator in which a resin-made bracket is formed and a liquid chamber is formed inside an elastic body, when the inner cylinder moves beyond a predetermined amount of displacement in the radial direction during bracket formation, a position where both ends of the inner cylinder collide with each other. A stopper is integrally formed on the bracket so as to be present, and the shape of the inner cylinder collision portion of the stopper is formed in a shape corresponding to the inner cylinder shape.

[0006]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

In the embodiment shown in FIG. 1, an inner cylinder 1 connected to one of a vibration generating portion and a vibration receiving portion as in the prior art.
And a resin bracket 2 serving also as an outer cylinder 2 </ b> B connected to the other, and an elastic body 3 is provided between the inner cylinder 1 and the bracket 2.
Is provided. The mounting portion 2A of the bracket 2 is fixed to a vehicle body (not shown), an engine (not shown) is mounted on the inner cylinder 1, and a part of the elastic body 3 covers the inner peripheral surface of the outer cylinder portion 2B of the bracket 2. It is provided to do. A body in which the inner cylinder 1 and the elastic body 3 are integrated (for example, one obtained by vulcanizing and bonding rubber to the inner cylinder 1) is set in a mold, and a resin material is injected into the mold to surround the elastic body 3. The outer cylinder part 2 of the bracket 2
B and the mounting portion 2A are formed. A stopper 20 is integrally formed with the bracket 2 so that when the inner cylinder 1 moves beyond a predetermined displacement amount in the radial direction when the bracket 2 is formed, both ends of the inner cylinder 1 are located at a position where they collide. The collision portion of the inner cylinder 1 against the stopper 20, that is, the shape of the upper surface portion 20A is formed in a shape corresponding to the shape of the inner cylinder 1. By forming the upper surface portion 20A into a shape corresponding to the shape of the inner cylinder 1, the outer peripheral surface of the inner cylinder 1 uniformly hits the upper surface portion 20A when colliding with the inner cylinder 1. Since the elastic body 3 is also coated on both end sides of the inner cylinder 1, the elastic body 3 collides with the stopper 20. When the elastic body 3 coated on both ends of the inner cylinder 1 collides with the upper surface portion 20A of the stopper 20, the outer peripheral surface thereof uniformly hits, so that the surface pressure can be reduced and the durability of the stopper 20 can be improved. .

FIG. 2 is a side view of FIG. 1, and a relationship between the stopper 20 and the elastic body 3 in FIG. 2 is shown in a partially enlarged sectional view of FIG. The lower end side of the elastic body 3 is engaged inside the bracket 20 in which the stopper 20 is formed.
The elastic body 3 and the bracket 2 are not adhered to each other, so that the elastic body 3 is freely expanded and contracted, and the durability of the elastic body 3 is maintained while controlling the displacement. A liquid chamber 4 is formed inside the elastic body 3. A liquid and a part necessary for forming the liquid chamber 4 are sealed and inserted from the opening 2 </ b> C as in the conventional case, and a lid (not shown) is provided on the lower end side of the bracket 2. The inside of the liquid chamber 4 is sealed by mounting.

[0009]

As described above, according to the present invention, the stopper is provided on the bracket such that both ends of the inner cylinder are located at the positions where both ends of the inner cylinder collide when the inner cylinder moves beyond a predetermined displacement amount in the radial direction during bracket formation. And the shape of the inner cylinder collision portion of the stopper is formed in a shape corresponding to the inner cylinder shape, so that it is not necessary to use a separate metal fitting as the stopper, so that the number of parts and the number of assembly steps can be reduced, and the cost can be reduced. It is possible to down. Further, when the inner cylinder hits the stopper, the inner cylinder hits the upper surface of the stopper uniformly, so that the surface pressure can be reduced and the durability of the stopper can be improved. Furthermore, even when there is no space for mounting a bracket as in the conventional case, this vibration isolator can be provided and displacement can be regulated.

[Brief description of the drawings]

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

FIG. 2 is a side view.

FIG. 3 is an enlarged cross-sectional view of a portion between an elastic body and a stopper.

FIG. 4 is a front sectional view showing a conventional example.

FIG. 5 is a side sectional view of a conventional example.

[Explanation of symbols]

 Reference Signs List 1 inner cylinder 2 bracket 2B outer cylinder 3 elastic body 20 stopper 20A upper surface

Claims (1)

[Claims] An inner cylinder connected to one of the vibration generator and the vibration receiver and a bracket serving as an outer cylinder connected to the other; an elastic body is provided between the inner cylinder and the bracket; An inner cylinder and an elastic body are integrated into a mold, a resin material is injected into the mold, a resin bracket is formed around the elastic body, and a liquid chamber is formed inside the elastic body. In the vibration damping device described above, a stopper is integrally formed on the bracket such that both ends of the inner cylinder are located at a position where both ends of the inner cylinder collide when the inner cylinder moves beyond a predetermined displacement amount in the radial direction during bracket formation. An anti-vibration device characterized in that the shape of the cylinder collision site is formed in a shape corresponding to the shape of the inner cylinder.