JPH08285004A - Vibration control device - Google Patents

Abstract

PURPOSE: To provide a vibration control device wherein a cover material and an elastic body are joined without using adhesive. CONSTITUTION: An inner cylinder metal fitting 14 is arranged on the inner side of a synthetic-resin-made bracket 12, and an elastic body 16 is arranged between the metal fitting 14 and the bracket 12. A reinforcing cylinder, composed of a pair of ring materials and a pair of connecting materials 32B, is embedded in a portion near to the outer peripheral side of the elastic body 16. An orifice 36 communicates between a main liquid chamber 34 and a sub- liquid-chamber 38 wherein a diaphragm 26 is adopted as a partitioning wall, and the diaphragm 26 is connected to the metal fitting 14 side. In fittingly mounting a resin-inflow preventive cover 30 on the elastic body 16, it is reinforced by the reinforcing cylinder to locate the cover 30 in a condition where the cover 30 is surely joined to the elastic body 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device applied to, for example, automobiles, general industrial machines, etc., to absorb vibrations from a vibration generating part, and in particular, an outer cylinder and a bracket are formed as an integral resin molded product. Regarding a vibration control device.

[0002]

2. Description of the Related Art For example, a vibration-damping device as an engine mount is arranged between an engine, which is a vibration generating portion of a vehicle, and a vehicle body, which is a vibration receiving portion. The vibration device absorbs the vibration and prevents the vibration from being transmitted to the vehicle body.

As this type of vibration damping device, a bush type vibration damping device such as a liquid filled type is known. When manufacturing such a bush-type vibration damping device, an elastic body made of a tubular rubber material is vulcanized and bonded to the outer periphery of the inner cylinder, and this is further inserted into the outer cylinder, and at the same time, the outer cylinder and the elastic body are The liquid is injected into the pressure receiving liquid chamber and the sub liquid chamber provided between the outer cylinder and the end portion of the outer cylinder is then drawn to prevent the outer cylinder from coming off and sealing. Then, the outer cylinder after the inner cylinder is attached is press-fitted into the bracket to be attached to the body of the automobile.

However, demands for cost reduction and weight reduction due to reduction of the number of parts and assembling man-hours have become strong in recent years, and as the use of resin for the parts has been examined,
A structure has been conceived in which a resin is injection-molded on the outer peripheral side of an elastic body having an inner cylinder, and a bracket integrated with the outer cylinder is arranged around the elastic body.

[0005]

However, such a vibration isolator has a structure in which an elastic body is put in a mold and a resin is molded on the outer peripheral side of the elastic body, and the outer periphery of the elastic body is covered with the resin. . Therefore, at the time of manufacturing, a metal cover material is installed on the outer peripheral side of the elastic body in which a liquid chamber such as a pressure receiving liquid chamber is formed, and the elastic body is sealed with the cover material. It is conceivable to mold the resin by putting it in a mold. However,
If the cover material is simply installed on the outer peripheral side of the elastic body, the adhesion between the cover material and the elastic body will be insufficient.Therefore, the elastic body in the portion that contacts the cover material when vibration is transmitted is required. It is conceivable that the liquid may be deformed as described above, the durability may be reduced, or the liquid in the liquid chamber may leak from between the cover member and the elastic body.

Therefore, the cover material can be fixed to the elastic body by adhering the cover material to the elastic body after vulcanization of the elastic body, but in this case, a step of applying the adhesive is required, and the vibration isolator Had the drawback of increasing the manufacturing cost. Further, when the elastic body and the cover material are bonded with an adhesive, conditions such as pressure bonding force and heat aging have a great influence on the bonding force, so it is necessary to strictly control the processing conditions to ensure the reliability of the bonding. And the manufacturing cost of the anti-vibration device may be further increased.

On the other hand, the pressure receiving liquid chamber and the sub liquid chamber are connected by an orifice which serves as a passage, and vibrations are damped by the pressure receiving liquid chamber, the sub liquid chamber and the orifice, which form a partition wall of the sub liquid chamber. Since the diaphragm is not connected to the inner cylinder side and has a space between the inner cylinder and the inner cylinder, the diaphragm is not positively deformed due to the displacement of the inner cylinder, and the vibration is not sufficiently damped.

In view of the above facts, it is an object of the present invention to provide a vibration damping device in which the vibration damping effect is improved and the cover material and the elastic body are securely joined without using an adhesive. .

[0009]

According to a first aspect of the present invention, there is provided a vibration isolator, a bracket directly connected to one of a vibration generating portion and a vibration receiving portion and integrally formed with resin, a vibration generating portion and a vibration receiving portion. An inner cylinder connected to the other of the parts and arranged inside the bracket, and an elastic body arranged between the bracket and the inner cylinder so as to connect the bracket and the inner cylinder, A pressure receiving liquid chamber in which at least a part of an inner wall is formed of the elastic body and in which a liquid is sealed, and a pressure receiving liquid chamber which is arranged to face the pressure receiving liquid chamber with the inner cylinder interposed therebetween in a direction along a radial direction of the inner cylinder. Further, at least a part of the partition wall is connected to the inner cylinder side and a sub liquid chamber communicated with the pressure receiving liquid chamber via a passage, the bracket and the inner cylinder in a state of being vulcanized and bonded to the elastic body. A reinforcing member arranged between the bra and the bra A cover member which is arranged to be interposed on the joint surface between the Tsu bets and the elastic body, characterized in that it comprises a.

[0010]

The operation of the vibration isolator according to claim 1 will be described below.

Since the elastic body connects between the bracket and the inner cylinder, and the inner cylinder or the bracket is connected to the vibration generating portion, when the vibration is transmitted from the vibration generating portion side to the inner cylinder or the bracket, the elastic body is elastic. The body is deformed, and as a result, the deformation of the elastic body attenuates the vibration, making it difficult to transmit the vibration to the vibration receiving portion side connected to the bracket or the inner cylinder.

Further, as the elastic body is deformed, the pressure receiving liquid chamber expands and contracts, and accordingly, the sub-liquid chamber connected via the passage expands and contracts, so that the liquid flows through the passage and becomes the liquid in the passage. Pressure changes and viscous resistance occur. For this reason, not only the deformation of the elastic body but also the change in pressure of the liquid, the viscous resistance, and the like dampen the vibration, and the vibration is more difficult to be transmitted to the vibration receiving portion side.

On the other hand, when the vibration isolator according to the present invention is manufactured, since the bracket is integrally formed of resin, the vibration isolator can be made lightweight and the bracket and the outer cylinder need to be processed by pressing or the like. As a result, the number of parts can be reduced and the number of assembly steps can be reduced to reduce costs.

Further, the reinforcing member vulcanized and adhered to the elastic body is arranged between the bracket and the inner cylinder, and the cover material is arranged on the joint surface between the bracket and the elastic body.

Therefore, even if an excessive vibration is input to the vibration isolator, the elastic member in the portion in contact with the cover member is reinforced by the reinforcing member, so that the cover member is separated from the cover member more than necessary and is durable. There is no loss of sex. Since the elastic member and the cover member are securely joined by the reinforcing member, the liquid in the liquid chamber does not leak out between the elastic member and the cover member.

Therefore, when covering the outer peripheral surface of the elastic body with the cover material, it is not necessary to bond the elastic body and the cover material with an adhesive, and the cost of the vibration isolator can be further reduced.

Further, since the auxiliary liquid chamber is arranged so as to face the pressure receiving liquid chamber with the inner cylinder interposed therebetween, and a part of the partition wall of the auxiliary liquid chamber is connected to the inner cylinder side, The partition of the sub liquid chamber is displaced such that the sub liquid chamber expands and contracts in a direction opposite to the expansion and contraction of the pressure receiving liquid chamber with the relative displacement between the bracket and the bracket.

As described above, since the partition wall of the sub liquid chamber is displaced so that the sub liquid chamber expands and contracts in the direction opposite to the expansion and contraction of the pressure receiving liquid chamber, the liquid is positively transferred between the sub liquid chamber and the pressure receiving liquid chamber. It is distributed, the damping action is further enhanced, and the vibration damping effect can be improved.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vibration isolation device according to a first embodiment of the present invention is shown in FIGS. 1 to 6, and this embodiment will be described with reference to these drawings.

As shown in FIGS. 1 and 2, the vibration isolator 10 of this embodiment is provided with an outer cylinder integral type bracket 12 integrally formed of synthetic resin, and is used as a vibration receiving portion of an automobile. A mounting portion 12B is formed so as to project from a body portion 12A formed in an annular shape of the bracket 12 toward the vehicle body (not shown) side of the vehicle. The bracket 12 is screwed to the vehicle body using the embedded nut 13 fixed to the mounting portion 12B. Therefore,
The bracket 12 will be connected to the vehicle body.

As shown in FIGS. 1 and 2, an inner cylindrical metal member 14 formed in a tubular shape is arranged inside the main body 12A of the bracket 12 so as to be parallel to the axis of the bracket 12. By screwing a bolt (not shown) into the inner tubular metal piece 14, the inner tubular metal piece 14 and the engine (not shown) serving as the vibration generating portion are connected.

Further, the inner tube fitting 14 and the bracket 1
An elastic body 16 made of rubber is disposed between the second main body portion 12A and the inner tubular metal fitting 14 so as to connect the inner tubular metal fitting 14 and the bracket 12 to each other. The elastic body 16 is vulcanized and adhered to the outer peripheral surface of 14.

At the outer peripheral side of the elastic body 16, as shown in FIG. 3, a reinforcing member made of steel composed of a pair of ring members 32A and a pair of connecting members 32B connecting the ring members 32A. The reinforcing cylinder 32 is embedded, and the reinforcing cylinder 32 reinforces the portion of the elastic body 16 near the outer periphery.

As shown in FIGS. 1 and 2, a recess 18 is formed in the axially intermediate portion of the elastic body 16 located between the pair of ring members 32A and below the inner tubular metal member 14. Has been done. A stopper metal fitting 20 for preventing an excessive displacement of the inner tubular metal fitting 14 is provided below the inner tubular metal fitting 14 and at an axially intermediate portion of the inner tubular metal fitting 14 so as to project toward the recess 18 side. This stopper fitting 2
A part of the elastic body 16 covers the periphery of 0. Therefore, a part of the elastic body 16 that covers the periphery of the stopper fitting 20 projects to the recess 18 side. Similarly, on the upper side of the inner tubular metal member 14 at the axially intermediate portion of the elastic body 16,
A recess 24 smaller than the recess 18 is formed.

On the other hand, the above-mentioned connecting members 32B are embedded in the elastic body 16 near the outer periphery of the axially intermediate portion, and these connecting materials 32B are located at the outer peripheral portion of the elastic body 16 in the axially intermediate portion. It is reinforced.

Further, as shown in FIG. 6, a connecting member 32B is provided.
A wide and shallow shallow groove 28 extending along the circumferential direction of the elastic body 16 is formed in the portion of the elastic body 16 that covers the outer peripheral side of the elastic body 16. A pair of grooves 22 extending along the direction are formed respectively.
Therefore, one end of each groove 22 is connected to the recess 18, and the other end is connected to the recess 24.

As shown in FIGS. 1, 2 and 6, the above-mentioned recess 2 is formed from the portion of the elastic body 16 near the outer periphery.
A diaphragm 26 which is a thin elastic film forming 4 extends so as to cover the upper side of the inner tubular metal member 14. The central portion of the elastic body 16 in the axial direction and the diaphragm 26 are connected by an arcuate connecting portion 16A in FIG. 1, which is a cross section perpendicular to the axial direction of the vibration isolator 10. Therefore, the diaphragm 26 is connected to the inner tubular metal fitting 14 side by the connecting portion 16A.
Will be connected via.

Further, a rubber stopper portion 40 extends upward at a central portion of the diaphragm 26, which is an upper position in FIGS. 1 and 2, and this stopper portion 40 causes excessive displacement of the diaphragm 26. Will be prevented.

Further, as shown in FIGS. 1, 2 and 6, the shallow groove 28 covers the recess 18, groove 22 and recess 24 along the outer peripheral surface of the elastic body 16, as shown in FIG. The resin inflow prevention cover 30 as a cylindrical cover material,
It is fitted.

The resin inflow prevention cover 30 is formed by cutting a metal round pipe into a predetermined length.
However, the inner diameter of the resin inflow prevention cover 30 is not limited to the shallow groove 28.
Initially formed to be larger than the outer diameter of the portion, the elastic body 16 is easily inserted from the axial direction. Then, with the elastic body 16 arranged in the resin inflow prevention cover 30,
By drawing the resin inflow prevention cover 30, the resin inflow prevention cover 30 is fitted to the elastic body 16 so as to be in close contact with the shallow groove 28. On this occasion,
Since the elastic body 16 is reinforced by the reinforcing cylinder 32,
It does not deform significantly, and the resin inflow prevention cover 3
0 and the elastic body 16 are securely fitted.

As described above, the resin inflow prevention cover 30 is disposed at the joint between the bracket 12 and the elastic body 16 while being interposed. Since the resin inflow prevention cover 30 is thus arranged on the outer peripheral surface side of the elastic body 16, the elasticity of the outer peripheral surface of the resin inflow prevention cover 30 and the portion not covered by the resin inflow prevention cover 30 is increased. The outer peripheral surface of the body 16 is bonded to the inner peripheral surface of the main body portion 12A of the bracket 12.

On the other hand, when the resin inflow prevention cover 30 is fitted in the shallow groove 28, the recess 18 is closed by the resin inflow prevention cover 30 as shown in FIGS. A chamber 34 is formed, the groove 22 is closed by the resin inflow prevention cover 30 to form an orifice 36 as a restriction passage, and the recess 24 is formed in the resin inflow prevention cover 3.
The auxiliary liquid chamber 38 is closed by being closed to zero. Therefore, the orifice 36 communicates between the main liquid chamber 34 and the sub liquid chamber 38, and the main liquid chamber 34 is sandwiched in the radial direction of the inner tubular member 14 with the inner tubular member 14 interposed therebetween. The partition wall of the sub liquid chamber 38, which is to be disposed opposite to
Will be configured. And this diaphragm 26
Is connected to the inner tubular metal fitting 14 side via the connecting portion 16A, so that the present embodiment is a so-called operation type vibration damping device 10.

A liquid such as water or oil is enclosed in the main liquid chamber 34, the orifice 36 and the sub liquid chamber 38.

Next, the assembly of the vibration damping device 10 according to this embodiment will be described. When assembling the vibration isolator 10, a circular tube is prepared in advance, a pair of window portions 33 are formed by pressing or the like, and the central portion is slightly squeezed to form a pair of ring members as shown in FIG. A reinforcing cylinder 32 including a material 32A and a pair of connecting materials 32B that connects the pair of ring materials 32A is formed. As a result, the reinforcing cylinder 32 can be obtained easily and at low cost.

After that, with the reinforcing cylinder 32 arranged on the outer peripheral side of the inner tubular metal fitting 14, the elastic body 16 is moved to the inner tubular metal fitting 14
After vulcanizing and adhering around it to form the state as shown in FIGS. 4 and 5, the elastic body 16 is axially inserted into the resin inflow prevention cover 30 as shown in FIG. A resin inflow prevention cover 30 is arranged at a position facing the shallow groove 28 of 16. And the resin inflow prevention cover 3
0 is drawn and tightly fitted into the shallow groove 28 of the elastic body 16, and the inner peripheral surface of the resin inflow prevention cover 30 and the shallow groove 28 are fitted.
Join with.

Next, the elastic body 16 with the resin inflow prevention cover 30 fitted therein and the embedded nut 13 are loaded at predetermined positions in a bracket molding mold (not shown), and the molten synthetic resin is molded in the mold. Inject. Thereby, the synthetic resin is bonded to the outer peripheral portions of the embedded nut 13, the elastic body 16 and the resin inflow prevention cover 30, and the bracket 12 integrated with the embedded nut 13, the elastic body 16 and the resin inflow prevention cover 30 is formed. .

At this time, the resin inflow prevention cover 30 is pressed by the injection pressure and is brought into close contact with the outer periphery of the elastic body 16, so that the concave portion 18,
Since the resin material is prevented from entering the groove 24 and the groove 22, the main liquid chamber 3 can be easily provided between the bracket 12 and the elastic body 16.
4, the sub liquid chamber 38 and the orifice 36 can be created.

After that, the bracket 12 is taken out of the mold, a predetermined liquid is injected into the inside through a liquid injection port (not shown) formed in the bracket 12, and sealed with a rivet (not shown) to complete the assembly of the vibration isolator 10. To do.

The bracket 12 of the vibration isolator 10 thus completed is screwed and connected to the vehicle body side of the automobile, and the inner cylinder metal fitting 14 is connected to the engine through bolts. When the vibration isolator 10 is installed in the vehicle body, a force due to the load of the engine is applied to the inner tubular metal fitting 14, so that the inner tubular metal fitting 14 is substantially coaxial with the bracket 12.

Next, the operation of this embodiment will be described. When the engine mounted on the inner tubular member 14 is operated, the vibration of the engine is transmitted to the elastic body 16 via the inner tubular member 14. The elastic body 16 acts mainly as a vibration absorber, absorbs the vibration by the damping function based on the internal friction of the elastic body 16, and makes it difficult to transmit the vibration to the vehicle body side.

Further, as the elastic body 16 is deformed, the main liquid chamber 3
4 expands and contracts, and accordingly, the sub-liquid chambers 38 connected via the pair of orifices 36 expand and contract due to the deformation of the diaphragm 26, respectively, so that the liquid flows through the orifices 36 and the viscous resistance of the liquid flow and the liquid column. The damping effect based on resonance or the like can improve the vibration damping effect.

On the other hand, when the vibration isolator 10 according to this embodiment is manufactured, since the bracket 12 is integrally molded with resin, the vibration isolator 10 can be made lighter and the bracket and the outer cylinder can be pressed. Since it is no longer necessary to process in, the number of parts can be reduced and the number of assembling steps can be reduced to reduce the cost.

Further, in this embodiment, the reinforcing cylinder 32, which is vulcanized and adhered to the outer peripheral side of the elastic body 16, is arranged between the bracket 12 and the inner tubular metal member 14, and further, the bracket 12 and the elastic member 32 are elastic. The resin inflow prevention cover 30 is arranged on the joint surface between the body 16 and the body 16.

Therefore, even if excessive vibration is input to the vibration isolator 10, the elastic body 16 in the portion in contact with the resin inflow prevention cover 30 is reinforced by the reinforcing cylinder 32.
It is prevented from being deformed more than necessary from the resin inflow prevention cover 30 and the durability of the elastic body 16 is not deteriorated. Since the resin inflow prevention cover 30 and the elastic body 16 are securely joined to each other by the reinforcing cylinder 32, the liquid in the liquid chambers 34, 38 and the orifice 36 is removed from between the resin inflow prevention cover 30 and the elastic body 16. It will not leak out.

Therefore, when covering the resin inflow prevention cover 30 on the outer peripheral surface of the elastic body 16, there is no need to bond the elastic body 16 and the resin inflow prevention cover 30 with an adhesive, and the cost of the vibration isolator 10 is reduced. You will be able to further down.

Further, the auxiliary liquid chamber 38 is disposed so as to face the main liquid chamber 34 with the inner tubular metal fitting 14 sandwiched therebetween, and a part of the diaphragm 26, which serves as a partition wall of the auxiliary liquid chamber 38, is part of the inner tubular metal fitting 1.
Since it is connected to the fourth side, the diaphragm 26 is expanded and contracted so that the auxiliary liquid chamber 38 expands and contracts in a direction opposite to the expansion and contraction of the main liquid chamber 34 with the relative displacement between the inner tubular metal member 14 and the bracket 12.
Is displaced.

As described above, since the diaphragm 26 is displaced so that the sub liquid chamber 38 expands and contracts in the direction opposite to the expansion and contraction of the main liquid chamber 34, the liquid is positively discharged between the sub liquid chamber 38 and the main liquid chamber 34. Is distributed, the damping action is further enhanced, and the vibration isolation device 10
The anti-vibration effect of can be improved.

Next, a vibration isolator according to a second embodiment of the present invention is shown in FIGS. 7 and 8, and this embodiment will be described based on these drawings. The same members as those described in the first embodiment are designated by the same reference numerals, and the duplicate description will be omitted.

The vibration damping device 10 according to this embodiment employs a reinforcing cylinder 42 as shown in FIG. 8 instead of the reinforcing cylinder 32 of the first embodiment.

This reinforcing cylinder 42, as shown in FIG.
A pair of ring members 42A is formed in advance, and further, a pair of connecting members 42B for connecting the pair of ring members 42A.
Is punched by press working or the like, and is processed into an arc shape to be curved so as to match the curvature shape of the ring material 42A.

Then, the pair of ring members 42A and the pair of connecting members 42B are joined by spot welding or the like as shown in FIG. 8 to form the reinforcing cylinder 42. As a result, if the reinforcing cylinder 42 of the present embodiment is adopted, not only the same operation as that of the first embodiment is achieved, but also the manufacturing of the reinforcing cylinder is simplified and the cost can be further reduced.

Next, a vibration damping device according to a third embodiment of the present invention is shown in FIGS. 9 and 10, and this embodiment will be described with reference to these drawings. The same members as those described in the first embodiment are designated by the same reference numerals, and the duplicate description will be omitted.

The vibration isolator 10 according to this embodiment employs a reinforcing cylinder 52 as shown in FIG. 10 instead of the reinforcing cylinder 32 of the first embodiment.

This reinforcing cylinder 52, as shown in FIG.
A plate-like plate member 54 having notches 56 at both ends and a rectangular hole 58 at the center is punched out from the material by press working or the like, and further, as shown in FIG. It is rolled and joined at both ends by spot welding or the like.

As a result, if the reinforcing cylinder 52 of this embodiment is adopted, not only the same operation as that of the first embodiment is achieved, but also
Similar to the second embodiment, the manufacturing of the reinforcing cylinder is simplified and the cost can be further reduced.

In the above embodiment, the bracket 12 is connected to the vehicle body side which is the vibration receiving portion, and the inner tubular metal piece 14 is connected to the engine side which is the vibration generating portion. Also good.

Further, in the above embodiment, the inner cylinder is made of metal fittings, but it may be made of resin. Further, as the kind of resin material used in the above embodiment, ABS, polyacetal, etc. are considered. Is not limited to.

Then, the reinforcing cylinder 32 serving as a reinforcing member,
Although the material of 42 and 52 is made of steel in this embodiment, it may be made of other metal material such as aluminum, or other material such as resin material.

On the other hand, the liquid injection port for injecting the liquid into the vibration isolator may be provided in the resin inflow prevention cover 30 in advance, or the liquid injection port may be formed after the bracket 12 is molded. Is also good. Then, after injecting the liquid, it is sealed with a rivet.

On the other hand, although the purpose of the present invention is to prevent the vibration of the engine mounted on the automobile, the vibration isolator of the present invention may be used for other purposes such as a body mount of an automobile or other uses than the automobile. Needless to say, the shape and dimensions of the elastic body and the like are not limited to those of the embodiment.

[0061]

As described above, since the vibration isolator of the present invention has the above-mentioned constitution, the vibration isolating effect is improved and the cover material and the elastic body are securely joined without using an adhesive. Has the excellent effect of being

[Brief description of drawings]

FIG. 1 is a cross-sectional view perpendicular to an axis showing a vibration damping device according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line 2-2 of FIG.

FIG. 3 is a perspective view of a reinforcing cylinder applied to the vibration isolator according to the first exemplary embodiment of the present invention.

FIG. 4 is a sectional view of an elastic body applied to the vibration isolator according to the first exemplary embodiment of the present invention, the cross section being perpendicular to the axis of the elastic body.

5 is a cross-sectional view taken along line 5-5 of FIG.

FIG. 6 is an exploded perspective view of an elastic body and a resin inflow prevention cover applied to the vibration isolator according to the first exemplary embodiment of the present invention.

FIG. 7 is an exploded perspective view of a reinforcing cylinder applied to the vibration isolator according to the second embodiment of the present invention.

FIG. 8 is a perspective view of a reinforcing cylinder applied to a vibration isolator according to a second embodiment of the present invention.

FIG. 9 is a development view of a reinforcing cylinder applied to the vibration damping device according to the third embodiment of the present invention.

FIG. 10 is a perspective view of a reinforcing cylinder applied to the vibration damping device according to the third embodiment of the present invention.

[Explanation of symbols]

 10 Vibration Isolator 12 Bracket 14 Inner Tube Metal Fitting 16 Elastic Body 30 Resin Inflow Prevention Cover (Cover Material) 32 Reinforcement Cylinder (Reinforcement Member) 34 Main Liquid Chamber (Pressure Received Liquid Chamber) 38 Sub Liquid Chamber 42 Reinforcement Cylinder (Reinforcement Member) 52 Reinforcing cylinder (reinforcing member)

Claims (1)

[Claims] 1. A bracket which is directly connected to one of the vibration generating part and the vibration receiving part and is integrally molded with resin, and a bracket which is connected to the other of the vibration generating part and the vibration receiving part and is arranged inside the bracket. An inner cylinder, an elastic body disposed between the bracket and the inner cylinder so as to connect between the bracket and the inner cylinder, and at least a part of an inner wall formed by the elastic body. And a pressure receiving liquid chamber in which is sealed, and is arranged to face the pressure receiving liquid chamber with the inner cylinder sandwiched in a direction along the radial direction of the inner cylinder, and at least a part of the partition wall is connected to the inner cylinder side. A sub liquid chamber communicating with the pressure receiving liquid chamber via a passage, a reinforcing member arranged between the bracket and the inner cylinder in a state of being vulcanized and bonded to the elastic body, and the bracket. Interposed on the joint surface with the elastic body A vibration isolator, comprising: