JP2001336567A - Vibration isolating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a damping effect not less than a fixed amount in a wide frequency range. SOLUTION: An inner cylindrical fitting 20 is disposed inside an outer cylindrical fitting 12, and a first damping plate 32 formed into a disc shape out of metal is coupled to the inner cylindrical fitting 20. Between the inner cylindrical fitting 20 and the outer cylindrical fitting 12, an elastic element 22 made of rubber and formed into a ring shape is arranged to couple the inner cylindrical fitting 20 and the outer cylindrical fitting 12. A space formed by surrounding with a bottom surface of the elastic element 22 and an inner peripheral surface of the outer cylindrical fitting 12 is defined as a liquid chamber 24, and the liquid chamber 24 is filled with liquid. A second damping plate 34 and a third damping plate 36 which are formed into a disc shape out of metal are supported by the elastic element 22 in formation dividing the elastic element 22 into three equal parts.

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 for absorbing vibrations and shocks from a vibration generating portion, and is applicable to a wide range of general industrial machines and devices. It is suitable for damping and buffering an input such as a shock.

[0002]

2. Description of the Related Art Conventionally, an inner cylinder is attached to an outer cylinder via an elastic body made of rubber or the like, a liquid chamber is built in, and the inner cylinder is connected to a vibration generating section or a vibration receiving section. A vibration isolator having such a structure is known. In such a vibration isolator, relative displacement along the axial direction occurs between the inner and outer cylinders due to vibration from an engine or the like.

For example, as an example of this type of vibration isolator,
The one shown in FIG. 6 is known, and the prior art will be described based on this figure. As shown in this figure, the vibration isolator 110 has a structure in which an inner cylinder 112 and an outer cylinder 114 are connected by an elastic body 116 such as a rubber material, and the weight of the vibration generating portion is supported by the elastic body 116. Has become.

That is, the bolt 122 screwed to the upper end of the inner cylinder 112 connects the inner cylinder 112 to the vibration generator and the outer cylinder 114 is connected to the vibration receiver and fixed. Has become. Further, a liquid chamber 120 filled with a liquid is formed in a space inside the outer cylinder 114 defined by the lid member 118 and the elastic body 116, and an attenuation plate 124 fixed to the inner cylinder 112 forms the liquid chamber 120. It is arranged to bisect.

Accordingly, when vibration is input along the direction of arrow P, the inner cylinder 112 causes relative movement with respect to the outer cylinder 114. As a result, as the damping plate 124 fixed to the inner cylinder 112 also moves relative to the outer cylinder 114, the orifice which is a gap between the outer periphery of the damping plate 124 and the inner wall of the liquid chamber 120 is formed. The liquid flows through the portion S to generate a damping force.

[0006]

That is, in such an anti-vibration device 110, a damping force is generated when the liquid passes through the orifice portion S. However, the magnitude of the flow resistance of the liquid and the resonance of the flowing liquid The damping force changes depending on the magnitude of the phenomenon. The size of the orifice portion S that determines the magnitude of the damping force is determined by the dimensional relationship between the outer diameter of the damping plate 124 and the inner diameter of the outer tube 114, and the damping plate 124 is directly connected to the inner tube 112. Since the damping plate 124 moves integrally with the inner cylinder 112, the damping plate 1
24 is determined by the magnitude of the amplitude of the vibration input to the inner cylinder 112.

As described above, when the liquid to be filled in the liquid chamber is a low-viscosity fluid (for example, ethylene glycol or the like) having a low flow resistance, most of the damping effect is caused by a resonance phenomenon accompanying the flow of the liquid. When the size of the orifice part is determined and the amount of liquid passing by the input of vibration is determined,
The damping effect was obtained only in a narrow frequency and amplitude range, and the vibration could not be sufficiently reduced in other frequency and amplitude ranges. For example, when ethylene glycol or the like is used as a liquid, it has a vibration-damping characteristic having a peak at which a large vibration damping effect can be obtained at a specific frequency and amplitude, and is widely used in engine mounts for automobiles and the like.

On the other hand, when the liquid filled in the liquid chamber is a high-viscosity fluid (eg, silicone oil) having a large flow resistance, the flow resistance of the liquid is also added, so that the peak of the damping force has a slight width. It will be wide. For this reason, the frequency of the input vibration cannot be relatively limited, and it is often used for machines that want to obtain a damping effect over a wide range of frequencies. However, before and after the peak, the vibration damping effect is half that of the peak. The vibrations could not be sufficiently reduced.

The present invention has been made in view of the above circumstances, and has as its object to provide an anti-vibration device capable of obtaining an attenuation effect of a certain amount or more in a wide frequency range.

[0010]

According to a first aspect of the present invention, there is provided an anti-vibration device comprising: a first mounting member connected to one of a vibration generating portion and a vibration receiving portion; A second mounting member to be connected, an elastic body disposed between the mounting members so as to connect the mounting members to relatively displace the mounting members by elastic deformation, and expanding and contracting the elastic body as a part of the partition wall A liquid chamber enabled and filled with liquid;
A plurality of damping members that are arranged with a gap between the inner wall of the liquid chamber and that move in the liquid chamber with a displacement amount different from each other due to deformation of the elastic body to generate a damping force, It is characterized by having.

The operation of the vibration isolator according to claim 1 will be described below. An elastic body connecting the first mounting member and the second mounting member is filled with a liquid in a liquid chamber that is a part of a partition wall, and has a gap between the liquid chamber and an inner wall of the liquid chamber. A plurality of damping members are arranged, and the plurality of damping members are
Each of the elastic members is movable in the liquid chamber with a different displacement amount according to the deformation of the elastic body.

Therefore, when the vibration generating section generates vibration, the vibration is transmitted to the elastic body via one of the first mounting member and the second mounting member, and the relative position between these mounting members is increased. Vibration is absorbed by the deformation of the elastic body due to the movement, and it becomes difficult for the vibration to be transmitted to the vibration receiving portion connected to the other mounting member. Further, with the relative movement between these mounting members, the plurality of damping members move in the liquid chamber with different displacement amounts from each other, and the individual damping members move in the respective gaps between the inner wall of the liquid chamber and the plurality of damping members. The liquid flows, and a damping force is generated by a damping action based on a resonance phenomenon and a viscous resistance caused by the liquid flow, so that an anti-vibration effect can be improved.

As a result, the plurality of damping members move in the liquid chamber with mutually different displacement amounts, so that different amounts of the liquid are filled in the gaps between the respective damping members and the inner wall of the liquid chamber. Since the fluid flows, the damping characteristic in which a peak depends on the frequency or amplitude of the vibration is improved, and a certain amount or more of damping effect can be obtained in a wide frequency range independent of the frequency or amplitude of the vibration.

The operation of the vibration isolator according to claim 2 will be described below. The present invention has a configuration similar to that of the first aspect and performs the same operation. However, in the present invention, a plurality of damping members are formed by a large displacement damping plate connected to any of the mounting members and arranged in the liquid chamber and a small displacement damping plate supported by the elastic body and arranged in the liquid chamber. It is configured. Therefore, unlike the conventional vibration isolator, one damping member is connected to any one of the mounting members and is arranged in the liquid chamber, unlike the small vibration damping apparatus supported by the elastic body and arranged in the liquid chamber. By having a plate, an attenuation effect of a certain amount or more can be obtained in a wide frequency range.

The operation of the vibration isolator according to claim 3 will be described below. The present invention has the same configuration as that of the second aspect and has the same effect. However, in this claim, a plurality of small displacement attenuation plates are arranged in the liquid chamber. Therefore, since the damping member is composed of at least one large displacement damping plate and two or more small displacement damping plates, a total of three or more members, the damping effect can be obtained in a wider frequency range.

According to a fourth aspect of the present invention, there is provided a vibration isolator, comprising: a cylindrical outer cylinder connected to one of the vibration generator and the vibration receiver; An inner cylinder connected to the other, an elastic body disposed between the inner cylinder and the outer cylinder to connect the inner cylinder and the outer cylinder, and relatively displacing the inner cylinder and the outer cylinder by elastic deformation; The elastic body can be expanded and contracted as a part of the partition wall, and is arranged with a gap between the liquid chamber filled with the liquid and the inner wall of the liquid chamber, and is different from each other with the deformation of the elastic body. And a plurality of damping members that move in the liquid chamber by the displacement amount to generate a damping force.

The operation of the vibration isolator according to claim 4 will be described below. It has substantially the same configuration as that of the first aspect, except that a cylindrical outer cylinder is connected to one of the vibration generating section and the vibration receiving section instead of the first mounting member, and an inner cylinder located inside the outer cylinder is provided. Instead of the second mounting member, it is connected to the other of the vibration generator and the vibration receiver. Also, an elastic body is disposed between the inner cylinder and the outer cylinder so as to connect the inner cylinder and the outer cylinder,
This elastic body is elastically deformed and relatively displaces the inner cylinder and the outer cylinder.

Therefore, when the vibration generating section generates vibration, the vibration is transmitted to the elastic body via one of the outer cylinder and the inner cylinder, and acts in the same manner as in claim 1, so that the relative movement between the inner and outer cylinders is achieved. As a result, the plurality of damping members move in the liquid chamber with mutually different displacement amounts.

As a result, in the same manner as in the first aspect, different amounts of liquid flow through the gaps between the individual damping members and the inner wall of the liquid chamber, depending on the frequency or amplitude of vibration. The damping characteristic in which a peak occurs is improved, and a certain amount or more of damping effect can be obtained in a wide frequency range independent of the frequency or amplitude of vibration.

The operation of the vibration isolator according to the fifth and sixth aspects will be described below. Since claim 5 has the same configuration as claim 2, it operates in the same manner as claim 2, and claim 6 has the same configuration as claim 3, so that claim 3 has the same configuration. Works in the same way as

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show a vibration isolator according to a first embodiment of the present invention, and the present embodiment will be described with reference to these drawings. As shown in FIGS. 1 to 3, the vibration isolator 10 of the present embodiment includes an outer tube fitting 12 that is a first attachment member connected to a frame side of a vehicle body such as a vehicle. This outer tube fitting 12 has a bottom surface 1 for sealing the lower end.
The outer cylindrical metal fitting 12 is provided with a flange portion 12A that expands in a square shape on the outer peripheral side.

Further, on the upper side of the flange portion 12A, a mounting flange 14 also having a square outer shape is provided.
Is caulked and connected to the flange portion 12A,
The center of the mounting flange 14 is bent downward and is located on the inner peripheral side of the outer cylinder fitting 12.
At four corners of the flange portion 12A and the mounting flange 14, bolt holes 16 through which mounting bolts (not shown) for mounting and connecting the outer cylinder fitting 12 to the vehicle body are formed.

On the other hand, at the center inside the outer cylinder fitting 12,
An inner cylindrical member 20 which is a second mounting member formed in a straight shape is disposed, and a first damping plate 32 which is a large displacement attenuation plate formed of metal in a disk shape is fixed to the inner cylindrical member 20 by bolts 26. It is screwed to the lower end and connected to the inner cylinder fitting 20. The upper end of the inner cylinder 20 protrudes upward from the outer cylinder 12, and a stud 28 extending upward above the inner cylinder 20 is screwed to the upper end of the inner cylinder 20.

Then, the stud 2 is attached to the vibration generating portion.
8 is screwed on the upper side, and the inner cylinder fitting 2 is
0 is connected, so that the vibration isolator 10 supports a vibration generating unit which is an engine.

On the other hand, between the inner cylindrical fitting 20 and the outer cylindrical fitting 12, an elastic body 22 made of rubber and formed in a ring shape is provided.
Are arranged to connect them, and the elastic body 22
Is vulcanized and bonded to the inner peripheral surface of the outer cylinder fitting 12, and the inner peripheral side of the elastic body 22 is vulcanized and bonded to the outer peripheral surface of the inner cylinder fitting 20. Therefore, the inner cylinder 20 and the outer cylinder 12 are relatively displaced by the elastic deformation of the elastic body 22. Further, the center of the mounting flange 14 is embedded in the elastic body 22 to improve the strength of the vibration isolator 10.

Here, a space formed by the lower surface of the elastic body 22 and the inner peripheral surface of the outer cylinder fitting 12 is a liquid chamber 24.
The liquid chamber 24 is filled with a liquid such as silicon oil or ethylene glycol. It should be noted that the liquid to be filled may contain not only a complete fluid but also some air in some cases. A second damping plate 34 and a third damping plate 36 formed of metal in a disk shape are respectively provided on portions of the elastic body 22 between the inner peripheral surface of the mounting flange 14 and the outer peripheral surface of the inner cylinder fitting 20. Are vulcanized and adhered so as to be arranged coaxially with the inner cylindrical member 20 and to divide the elastic body 22 into three equal parts. Therefore, these two damping plates 34 and 36 are the small displacement damping plates of the present invention.

The lower ends of the two attenuation plates 34, 36 are so arranged that the lower ends 34A, 36A of the first attenuation plate 32 and the two attenuation plates 34, 36 have substantially the same pitch. Each of 34A and 36A is bent in a flange shape on the outer peripheral side, and is disposed in the liquid chamber 24. Also, the orifice portion S, which is a gap between the outer peripheral ends of the lower end portions 34A, 36A of the damping plates 34, 36 and the inner peripheral surface of the outer cylinder fitting 12, is provided.
2 and S3 have substantially the same size as the orifice portion S1, which is a gap between the outer peripheral end of the first damping plate 32 and the inner peripheral surface of the outer cylinder fitting 12.

For this reason, the first damping plate 32 and the damping plates 34, 3
6 are disposed in the liquid chamber 24, and when the inner cylinder 20 moves in the direction of arrow P, which is the vertical direction in FIG. 1, with the input of vibration, the first damping plate 32 The lower ends 34A, 36A of the damping plates 34, 36 move in the direction of the arrow P in the liquid chamber 24.
At this time, these damping plates 32, 34, and 36 move within the liquid chamber 24 by mutually different displacement amounts, and
The liquid flows in the orifice portions S1, S2, S3 between the inner wall of the liquid chamber 24 formed by the inner peripheral surface of the liquid crystal panel and the outer peripheral ends of the first damping plate 32 and the damping plates 34, 36.

Next, the operation of the vibration isolator 10 according to the present embodiment will be described. From the above, the outer cylinder fitting 12 and the inner cylinder fitting 2
Liquid is filled in a liquid chamber 24 in which an elastic body 22 connecting between the liquid chamber 24 and the inner wall of the liquid chamber 24 is formed as a part of a partition wall. The first damping plate 32 and the damping plates 34, 36 having the damping plates 32, 34, 36
Each of the liquid chambers 2 has a different displacement amount due to the deformation of the liquid chamber 2.
4 to generate damping force by the flow of the liquid. That is, in the present embodiment, the first damping plate 32 connected to the inner cylinder fitting 20 and disposed in the liquid chamber 24 and the second damping plate supported by the elastic body 22 and disposed in the liquid chamber 24 The plurality of damping members of the present invention are constituted by the third damping plate 34 and the third damping plate 36.

As described above, when the vibration is generated on the vibration generating section side, the vibration is transmitted to the elastic body 22 via the inner cylinder 20 and the relative movement between the inner cylinder 20 and the outer cylinder 12. Vibration is absorbed by the deformation of the elastic body 22 due to the excessive movement, and it becomes difficult for the vibration to be transmitted to the vibration receiving portion connected to the inner cylindrical fitting 20.

Further, the inner cylinder 20 and the outer cylinder 1
With the relative movement between the two, a plurality of damping plates 32,
The orifices S1, S2 between the inner wall of the liquid chamber 24 and the outer peripheral ends of the first damping plate 32 and the damping plates 34, 36 by moving the respective 34, 36 in the liquid chamber 24 with different displacement amounts from each other. , S3, a liquid flows, and a damping force is generated by a damping action based on a resonance phenomenon and a viscous resistance caused by the liquid flow, so that the vibration damping effect can be improved.

As a result, the plurality of attenuation plates 32, 34, 36
Move in the liquid chamber 24 with different displacement amounts, respectively, so that different amounts of liquid are mixed in the orifice portions S1,
Since S2 and S3 respectively flow, the damping characteristic in which a peak occurs depending on the frequency or amplitude of vibration is improved,
The damping effect of a certain amount or more can be obtained in a wide frequency range that does not depend on the frequency or amplitude of the vibration.

That is, unlike the conventional vibration isolator, one damping plate is connected to the inner cylinder and is disposed in the liquid chamber, and is different from the conventional vibration isolator which is supported by the elastic body 22 and disposed in the liquid chamber 24. By having the two damping plates 34 and 36 described above, the above-described damping effect can be obtained.

More specifically, the basic deformation amount of the elastic body 22 and the displacement amount of the first damping plate 32 with respect to the input of vibration are the same as those of the conventional vibration isolator. Is displaced by 10 mm in the direction of arrow P in FIG. 1, the first damping plate 32 connected to the inner cylindrical fitting 20 also has a displacement of 10 mm.
Displacement, the effect of which determines the frequency of the peak of the damping force. Further, in the present embodiment, the two attenuation plates 34, 3
6 are arranged so as to divide the elastic body 22 into three equal parts. If the spring constant of the elastic body 22 divided into three equal parts is also set to correspond to this, the displacement of the inner cylindrical fitting 20 by 10 mm is obtained. On the other hand, the displacement amount of the second damping plate 34 is about 6.7 mm, and the displacement amount of the third damping plate 36 is about 3.3 mm.

Therefore, the peaks of the damping force can be formed from the displacement amounts of the first damping plate 32 and the two damping plates 34 and 36, and as a result of adding these three peaks, The damping characteristic of the characteristic curve A that is flatter than the characteristic curve B of the conventional vibration isolator shown in FIG. 4 is obtained in the vibration isolator 10 of the present embodiment.

On the other hand, in addition to changing the number of damping plates, in the present embodiment, the damping plates 34, 3
6 by changing the positional relationship of the arrangement in the elastic body 22, the displacement amount of each of the damping plates 34, 36 can be reduced.
It can be adjusted how to set the displacement.
For this reason, it is possible to freely set not only the flat attenuation characteristic but also the maximum attenuation at any frequency or any amplitude.

Next, a vibration isolator according to a second embodiment of the present invention is shown in FIG. 5, and the present embodiment will be described with reference to FIG. Unlike the first embodiment in which the elastic body 22 is used in a state of being deformed in the shearing direction, the vibration isolator 40 according to the present embodiment shown in FIG. 5 is used in a state of being deformed in the compression direction. .

That is, a lower bracket 44 for sealing a lower side of the outer cylinder fitting 42 is attached to a lower end portion of the cylindrical outer cylinder fitting 42 serving as an outer frame of the vibration isolator 40.
The lower bracket 44 has a bolt hole 44A into which a mounting bolt (not shown) for attaching the outer cylinder fitting 42 to the wheel side and connecting the same is inserted.

Inside the outer tube fitting 42, an axial inner tube fitting 4 is provided.
6, and an upper bracket 48 having a bolt hole 48 </ b> A is screwed and attached to an upper end portion of the inner tube fitting 46. A mounting bolt (not shown) for mounting and connecting the inner cylinder fitting 46 to the vehicle body side is provided by:
It will be inserted into this bolt hole 48A. further,
A first damping plate 62, which is a large displacement damping plate made of metal in a disk shape, is screwed with a bolt 60 to the lower end of the inner cylinder fitting 46, and is connected to the inner cylinder fitting 46.

On the other hand, a ring plate 52 formed in an annular shape is located below the upper bracket 48, and a rubber cylinder is provided between the ring plate 52 and the first damping plate 62. The elastic body 50 formed in the shape is vulcanized and adhered to the lower surface of the ring plate 52 and vulcanized and adhered to the upper surface of the first damping plate 62 so as to be connected to each other. A metal support ring 54 formed in a ring shape is disposed in the middle of the elastic body 50 in the axial direction, and the elastic body 50 is also vulcanized and bonded to the support metal 54. Therefore, the support member 54 is displaced relative to the ring plate 52 and the first damping plate 62 due to the elastic deformation of the elastic body 50.

Further, since the upper end of the outer cylinder 42 is locked by the support metal 54, the upper end of the outer cylinder 42 is sealed, and the space between the outer cylinder 42 and the elastic body 50 is sealed. A liquid chamber 56 filled with the liquid is formed, and a cover 58 locked to the ring plate 52 covers the outside of the support fitting 54 and the outer cylinder fitting 42. Further, the elastic body 50
The ring-shaped plate members are arranged at equal intervals along the axial direction of a plurality of ring-shaped members arranged in the liquid chamber 56 at equal intervals between the support fitting 54 and the first damping plate 62. Are the second damping plates 64, each of which is a small displacement damping plate. The inner wall of the liquid chamber 56, the first damping plate 62 and the second
Orifice portions S which are gaps with the damping plate 64
Is provided.

As described above, the vibration isolator 4 according to the present embodiment is
In the case of 0, the outer cylinder fitting 42 is a first attachment member connected to the wheel as the vibration generating unit, and the inner cylinder fitting 46 is a second attachment member connected to the vehicle body as the vibration receiving unit. .

Next, the operation of the vibration isolator 40 according to this embodiment will be described. In the present embodiment, the upper bracket 4
When a compressive force is applied between the lower bracket 8 and the lower bracket 44, the upper elastic body 50 of the support fitting 54 is compressed and the lower elastic body 50 of the support fitting 54 is pulled. However, as in the first embodiment, the structure is such that vibration is reduced.

That is, the elastic body 50 connecting the outer cylinder fitting 42 and the inner cylinder fitting 46 is a liquid chamber 56 in which a part of the partition wall is formed.
Is filled with a liquid, and a first damping plate 62 having an orifice portion S which is a gap between the first damping plate 62 and the inner wall of the liquid chamber 56.
And a plurality of second damping plates 64 are arranged, and these damping plates 62 and 64 move in the liquid chamber 56 with mutually different displacement amounts due to the deformation of the elastic body 50, and the damping force is generated by the flow of the liquid. Generate.

Accordingly, in the same manner as in the first embodiment, the plurality of attenuating plates 62 and 64 move in the liquid chamber 56 with mutually different displacement amounts, and different amounts of liquid are mutually displaced. Since each of the orifices S flows, the damping characteristic in which a peak depends on the frequency or amplitude of the vibration is improved, and a damping effect of a certain amount or more can be obtained in a wide frequency range independent of the frequency or amplitude of the vibration. Become.

In the above embodiment, the inner tube 20 or the outer tube 42 is connected to the vibration generating section, and the outer tube 12 or the inner tube 46 is connected to the vibration receiving section. However, the reverse configuration may be adopted. Also,
In the description of the above embodiment, the vibration is attenuated to be reduced. However, the present invention can also buffer a shock having a large amplitude that suddenly exists in the vibration. Further, the sizes of the plurality of orifices in the above embodiment may be the same, or the sizes of the plurality of orifices may be different from each other in order to obtain appropriate damping characteristics.

On the other hand, in the first embodiment, two small displacement damping plates are used, but three or more small displacement damping plates may be used.
In the first embodiment, the purpose is to dampen an engine mounted on a vehicle body such as a vehicle, and in the second embodiment, the purpose is to dampen a vibration between a wheel and a vehicle body. It goes without saying that the vibration damping device of the present invention is also used for applications other than vehicles, such as construction machines and agricultural machines. In addition, the outer tube fittings 12 and 42, the inner tube fittings 20 and 46, and the like can be made of resin to reduce the weight.

[0048]

As described above, the anti-vibration device of the present invention has the above-mentioned structure, and therefore has an excellent effect that a certain amount or more of damping effect can be obtained in a wide frequency range.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a vibration isolator according to a first embodiment of the present invention, which is a cross-sectional view taken along line 1-1 of FIG.

FIG. 2 is a plan view of the vibration isolator according to the first embodiment of the present invention.

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

FIG. 4 is a graph showing a relationship between an excitation frequency and a loss factor.

FIG. 5 is a cross-sectional view of a vibration isolator according to a second embodiment of the present invention.

FIG. 6 is a sectional view of a conventional vibration damping device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vibration isolator 12 Outer cylinder fitting (1st mounting member) 20 Inner cylinder fitting (2nd mounting member) 22 Elastic body 24 Liquid chamber 32 1st damping plate 34 2nd damping plate 36 3rd damping plate 40 Vibration isolation Apparatus 42 Outer tube fitting (first attachment member) 46 Inner tube fitting (second attachment member) 50 Elastic body 56 Liquid chamber 62 First damping plate 64 Second damping plate

Claims (6)

[Claims] A first mounting member connected to one of the vibration generating portion and the vibration receiving portion; a second mounting member connected to the other of the vibration generating portion and the vibration receiving portion; An elastic body disposed between the mounting members so as to be connected to each other and displacing the mounting members relative to each other by elastic deformation; a liquid chamber capable of expanding and contracting the elastic body as a part of the partition wall and being filled with a liquid; And a plurality of damping members which are arranged with a gap between the inner wall and the inner wall, and which move in the liquid chamber with a mutually different displacement amount in accordance with the deformation of the elastic body to generate a damping force. A vibration isolator characterized by the above-mentioned. 2. A plurality of damping members each comprising a large displacement damping plate connected to one of the mounting members and arranged in the liquid chamber, and a small displacement damping plate supported by an elastic body and arranged in the liquid chamber. The vibration isolator according to claim 1, wherein the vibration is reduced. 3. The vibration damping device according to claim 2, wherein a plurality of small displacement damping plates are arranged in the liquid chamber. A cylindrical outer cylinder connected to one of the vibration generator and the vibration receiver; an inner cylinder positioned inside the outer cylinder and connected to the other of the vibration generator and the vibration receiver; An elastic body that is disposed between the inner and outer cylinders so as to connect the inner and outer cylinders and that relatively displaces the inner and outer cylinders by elastic deformation; The liquid chamber, which is made possible and filled with the liquid, is disposed with a gap between each of the liquid chambers and the inner wall of the liquid chamber, and moves in the liquid chambers by different displacements with the deformation of the elastic body. And a plurality of damping members for generating damping force. 5. A damping member comprising a large displacement damping plate connected to an inner cylinder and disposed in a liquid chamber and a small displacement damping plate supported by an elastic body and disposed in the liquid chamber. The vibration isolator according to claim 4, characterized in that: 6. The vibration damping device according to claim 5, wherein a plurality of small displacement attenuation plates are arranged in the liquid chamber.