JP2000320604A - Liquid-sealed vibration control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control structure having directivity and variable spring rate characteristics. SOLUTION: An inner member 2 is concentrically arranged inside an outer cylinder 1, while the outer cylinder 1 and the inner member 2 are elastically connected with an elastic vibration control member 3. Circular arc-like grooves 4, 5 are formed around the elastic vibrationproofing member 3, and each of the groove is fitted to ring members 8, 9, forming one continuous ring member. Elastic partitioning walls 6, 7 integrated with the elastic vibration control member 3 are extended in the opposite directions from the inner member 2 side to the inside of the circular arc-like grooves 4, 5, and the tip end parts 6a, 7a of the walls 6, 7 are tapered off. At the tip end of the tip end parts 6a, 7a, a seal projection 7b is formed. By elastically deforming this projection 7b until it abuts liquid-tight on the inner peripheral surfaces of the ring members 8, 9, liquid chambers 10 and 11 communicated with each other via fluid passages 14, 15 are partitioned. By arranging these elastic partitioning walls 6, 7 toward the right and left directions of a car body, a diretivity of absorbing the input vibration in the right and left directions can be obtained, the elastic deformation corresponding to the intensity of the input vibration can be produced, and variable spring rate characteristics can be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-sealing vibration isolator suitable for use in a sub-frame mount or the like provided between a sub-frame provided for supporting an engine or the like of an automobile and a vehicle body frame.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. 7-269637 discloses an inner cylinder and an outer cylinder which are concentrically arranged, a rubber elastic body is interposed between the inner and outer cylinders, and a left and right elastic body sandwiching the inner cylinder of the rubber elastic body. A liquid-filled bush is shown in which a pair of liquid chambers partitioned by a partition wall are provided, a fluid is sealed in each of these liquid chambers, and each liquid chamber is connected by an orifice passage. The elastic partition wall extends in the radial direction from the outer cylinder side toward the inner cylinder, and its tip forms a wedge shape and contacts the inner cylinder.

Japanese Patent Application Laid-Open No. Hei 7-293630 discloses a similar liquid-sealing bush, in which a pair of elastic partition walls extend radially outward from the inner cylinder side, and the ends of the partition walls extend into the outer cylinder. In the figure, a part that is brought into contact with the peripheral surface and a part of the contact part is made movable and fixed to the outer cylinder side is shown.

[0004]

In such a liquid-sealed vibration isolator, there is generally a demand for a low dynamic spring. For this purpose, an elastic partition wall is provided with an inner cylinder or an outer cylinder as in the above-mentioned prior arts. It is effective to separate them from either side to prevent them from being integrated. Further, it is desirable to have a variable spring rate characteristic that not only simply reduces the dynamic spring but also increases the spring rate gradually according to the magnitude of the input vibration. Furthermore, it is desired to effectively utilize an elastic partition wall to effectively absorb input vibration in a specific direction.

However, Japanese Patent Application Laid-Open No. 7-26963 describes
In No. 7, the elastic partition wall extends inward from the outer cylinder side, and the distal end of the elastic partition wall is in contact with the inner cylinder. Are merely intended to alleviate stress concentration on the vicinity of the inner cylinder of the elastic partition wall by sliding on the surface of the inner cylinder.

That is, in the case where the inner cylinder relatively moves in the direction in which the elastic partition wall extends in the cross section orthogonal to the axis, the inner cylinder can be absorbed by the elastic deformation of the arm-shaped elastic partition wall. When moving relatively in the oblique direction, absorption by the elastic deformation of the elastic partition wall cannot be expected, and therefore, the elastic partition wall cannot be effectively utilized.

In addition, since the elastic partition wall has a substantially wedge shape, the above-mentioned variable spring rate characteristic is considered to be obtained when the inner cylinder moves in the extending direction of the elastic partition wall. What cannot be expected in the oblique direction is as described above.

In Japanese Patent Application Laid-Open No. 7-293630, the distal end of the elastic partition wall is formed in a T-shaped cross section so as to abut on the outer cylinder with a large area, and is fixed so as to be immovable in the circumferential direction except for the central portion. Therefore, when the relative movement of the inner cylinder is received by the elastic partition wall, the spring rate becomes high from the beginning, and the variable spring rate characteristic as described above cannot be expected.

[0009] In addition, the elastic partition wall has a distal end portion to the outer cylinder,
Since the base side is fixed to the inner cylinder side, the behavior of the elastic partition wall when the inner cylinder moves in the direction perpendicular to or oblique to the extending direction of the elastic partition wall due to input vibration is simply a general behavior. Is not different from that of a typical elastic partition,
It is not possible to exhibit the directionality in vibration absorption or a sufficiently low dynamic spring.

Therefore, the present invention provides a liquid ring vibration isolator in which the abutting portion of the elastic partition wall slides, and exhibits a variable spring rate characteristic with respect to vibration in all directions, thereby effectively absorbing vibration. It is another object of the present invention to be able to perform directional vibration absorption with respect to vibration input in the direction in which the elastic partition wall extends.

[0011]

According to a first aspect of the present invention, there is provided a liquid seal vibration isolator according to the present invention, comprising a substantially cylindrical outer cylinder and a concentric or eccentric arrangement inside the outer cylinder. And an elastic vibration isolating member interposed between the outer cylinder and the inner member. The elastic vibration isolating member is provided with a liquid chamber concave portion that opens to the outer peripheral surface. The inner surface is covered with an arc-shaped outer peripheral wall, and elastic partition walls for partitioning the inside of the liquid chamber recess are provided at symmetrical positions sandwiching the inner member, and the radially outer ends of these elastic partition walls are provided. A liquid sealing portion in which a liquid chamber concave portion is divided into a plurality of liquid chambers by abutting a portion on the inner surface of the outer peripheral wall, a liquid is sealed in each of the liquid chambers, and the liquid chambers communicate with each other through a fluid passage. In the above, the elastic partition wall has a tip portion that changes in a tapered shape outward in the radial direction. , Characterized in that the distal end portion slidably brought into contact to the outer peripheral wall interior surface.

According to a second aspect, in the first aspect,
A seal projection is provided at a tip portion of the elastic partition wall, and is elastically deformed to be brought into sliding contact with the inner surface of the outer peripheral wall.

According to a third aspect, in the first aspect,
The liquid chamber concave portion is an annular groove formed in a substantially annular shape by opening to the outer peripheral portion of the elastic vibration isolating member, and the outer peripheral wall is a ring-shaped member that covers the opening of the annular groove in a ring shape. Features.

According to a fourth aspect, in the third aspect,
The ring-shaped member is composed of a pair of arc-shaped members divided into a semi-circular shape, and a joining portion of the two ring-shaped members is circumferentially shifted from a position where a tip end of the elastic partition wall abuts. Features.

According to a fifth aspect based on the first aspect,
A harder core member is integrated on the inner member side of the elastic partition wall.

In a sixth aspect based on the first aspect,
Only the portion of the inner surface of the outer peripheral wall where the distal end portion of the elastic partition wall slides is defined as an inflection portion different from other portions. The inflection portion structure includes a curved surface different from the other portions, that is, a curved surface such as an arc or an elliptical arc having a different curvature, and a substantially V-shaped or stepped inclined surface.

According to a seventh aspect, in the first aspect,
It is characterized in that the pair of elastic partition walls have a structure having different spring characteristics from the other.

According to an eighth aspect based on the first aspect,
The outer peripheral wall is an outer cylinder.

[0019]

According to the first aspect of the present invention, the distal end of the elastic partition wall is tapered and slidably abuts against the inner surface of the outer peripheral wall. The elastic partition wall is elastically deformed in accordance with the size, and changes to a low spring rate for a small vibration and to a higher spring rate as the vibration increases, thereby exhibiting a preferable variable spring rate characteristic.

Even when vibration is input in a direction orthogonal or oblique to the direction of the elastic partition wall, the distal end slides on the inner peripheral surface of the outer peripheral wall with the movement of the inner member. Since compression is applied in the direction of the inner member, and the degree of compression gradually increases in accordance with the amount of movement, a variable spring rate characteristic can also be exhibited.

Therefore, the elastic partition wall exhibits a variable spring rate characteristic with respect to vibrations in all directions, so that vibrations can be effectively and preferably absorbed. In addition, a low dynamic spring can be realized by sliding the end of the elastic partition wall to the outer peripheral wall, and the elastic partition wall has a directional vibration against the vibration input in the extending direction of the elastic partition wall. Absorption can be performed.

According to the second aspect, the distal end of the elastic partition wall elastically deforms the seal projection provided at the distal end and comes into sliding contact with the inner surface of the outer peripheral wall. A good sealing property can be maintained.

According to the third aspect, the ring-shaped member covering the opening of the annular groove can be effectively used as the outer peripheral wall.

According to the fourth aspect, since the ring-shaped member is constituted by a pair of ring-shaped members divided into a semicircle, these are fitted into the arc-shaped groove from the outside in the radial direction. Can be attached, and assemblability is improved. In addition, since the joining portion of the two ring-shaped members is shifted from the area where the leading end of the elastic partition wall abuts, it is not necessary to concentrate the three members in one place, so that the assembling becomes easier and the sliding of the leading end slides. There is no hindrance.

According to the fifth aspect of the present invention, since the core member is integrated with the inner member side portion of the elastic partition wall, a larger spring rate can be realized in addition to a variable spring rate characteristic formed by tapering, and a wider range of input can be realized. Can respond to changes in vibration.

According to the sixth aspect of the present invention, of the inner surface of the outer peripheral wall,
Since only the portion where the distal end portion of the elastic partition wall slides is formed as an inflection portion different from other portions, the variable spring rate characteristic accompanying the sliding of the distal end portion can be variously tuned.

According to the seventh aspect, the spring characteristics such as the material and structure of the pair of elastic partitions are different from those of the other, so that the variable spring rate characteristics of each elastic partition are different. As a result, the absorption of the vibration on the one side and the vibration on the opposite side in the extending direction of the elastic partition wall is different, and the directionality of the vibration absorption in the input vibration direction can be provided.

According to the eighth aspect, since the outer peripheral wall is the inner surface of the outer cylinder, it is not necessary to use the ring-shaped member or a specific example thereof, such as an arc-shaped member. Can be further simplified.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show a subframe mount for an automobile according to a first embodiment. FIG. 1 is a cross-sectional view passing through an arc-shaped groove portion of the subframe mount, FIG. 2 is a top view thereof, and FIG. 2 is a sectional view along the line 3-3 (the outer cylinder is omitted), and FIG. 4 is a perspective view at the time of assembly.

First, the schematic structure of the subframe mount will be described. The sub-frame mount includes an outer cylinder 1 made of a suitable metal, an inner member 2 made of a similar material and formed in the same material concentrically or eccentrically inside and having an appropriate shape such as a cylindrical shape, and elastically connected to each other by being interposed therebetween. An elastic vibration isolating member 3 made of a known material such as rubber or elastomer is provided.

As shown in FIG. 4, a pair of semicircular arc-shaped grooves 4 and 5 are respectively formed around the elastic vibration isolating member 3 having a substantially cylindrical shape in the radial direction of the elastic vibration isolating member 3. Each is formed by a pair of elastic partitioning walls 6 and 7 extending outward in the radial direction with the inner member 2 interposed therebetween. The arc-shaped members 8 and 9 are fitted in the grooves 4 and 5, thereby forming liquid chambers 10 and 11 (FIG. 1).

A known incompressible liquid is sealed in the liquid chambers 10 and 11 and is formed in each of the ends of the arc-shaped members 8 and 9 in the vicinity of the opposing connection surfaces 12 and 13. The fluid passages 14 and 15 communicate with each other.
15 constitutes one orifice passage.

The arc-shaped members 8 and 9 are connected to the elastic vibration isolator 3
The small assembly 18 (FIG. 4) attached to the outer cylinder 1 is press-fitted into the outer cylinder 1, and a projection 19 provided at one end of the outer cylinder 1 and the other end are caulked to form a subframe mount integrated as a whole. (FIG. 3).

In this sub-frame mount, as shown in FIG. 1, elastic partition walls 6 and 7 are arranged toward the left and right sides of the vehicle body, and when used in this state, the fluid passages 14 and 15 through the liquid chambers 10 and 11 are used. Form an orifice passage, and when vibration is input, the vibration is attenuated by liquid column resonance in the orifice passage.

Further, with respect to the vibration in the front-rear direction, the volumes of the liquid chambers 10 and 11 change due to the elastic deformation of the elastic partition walls 6 and 7, and the volumes inside the liquid chambers 10 and 11 change with the volume fluctuation at that time. The liquid moves between the fluid passages 14 and 15 to be attenuated and absorbed. Further, when vibration in the left-right direction is applied, fluid movement between the liquid chambers 10 and 11 is not involved, but is absorbed by the elastic deformation of the elastic partition walls 6 and 7 and the deformation of the entire elastic vibration isolating member 3. .

Next, details will be described. The elastic vibration isolating member 3 is formed integrally with the inner member 2 around the same. At this time, the arc-shaped grooves 4, 5 and the elastic partition walls 6, 7 are formed integrally, and as shown in FIG. The radial inner ends of the inner members 6 and 7 are integrated with the inner member 2, and the distal ends 6a and 7a on the radial outer ends on the other ends are free before assembly.

The tip portions 6a, 7a form an acute angle that changes to a tapered shape in which the tip side is tapered, and comes into liquid-tight contact with the inner peripheral surfaces of the ring-shaped members 8, 9, respectively.
Is partitioned. As shown in the enlarged portion in the figure, the tip 7
a seal projection 7b is formed in advance at the tip of
a is formed by elastically deforming the seal projection 7b to be pressed against the inner peripheral surface of the arc-shaped member 8 near the connection end thereof and to be slidable in a liquid-tight manner. The same applies to the tip 6a.

Each of the inner peripheral surfaces in the vicinity of the connection ends of the arc-shaped members 8, 9 with which the tips 6a, 7a abut, are continuous with other parts so that the tips 6a, 7a can slide in a liquid-tight manner. It forms a uniform curved surface, and the connecting portion of the arc-shaped members 8 and 9 is
The position is shifted in the circumferential direction from the sliding range of a and 7a.

Each of the arc-shaped members 8 and 9 is composed of two rings.
It corresponds to the divided one, and is made of an appropriate material harder than the elastic vibration isolating member 3 such as plastic or metal. In the present embodiment, each is formed into a substantially semi-arc shape by molding using plastic. .

The arc-shaped members 8 and 9 are fitted into the open portions of the arc-shaped grooves 4 and 5 from the radially outer side of the elastic vibration-isolating member 3 and connected to each other at their ends to be combined. It has a continuous ring shape and covers each open part of the arc-shaped grooves 4 and 5 and is attached around the elastic vibration isolating member 3.

Reference numerals 8a and 9a shown in FIG. 4 are positioning projections integrally formed at appropriate positions on the outer peripheral portions of the arc-shaped members 8 and 9, respectively. It fits into a positioning recess 3 a formed in the outer peripheral portion of the vibration member 3 (FIG. 3), and prevents the arc-shaped members 8 and 9 from rotating around the elastic vibration-proof member 3 in the circumferential direction.

By this mounting, the connection surfaces 12 and 16 at both ends of the arc-shaped member 8 are joined to the connection surfaces 13 and 17 at both ends of the arc-shaped member 9 respectively, and the connection end portions of the arc-shaped members 8 and 9 are connected. Among them, the fluid passages 14 and 15 provided near the connection surfaces 12 and 13 are in communication with each other.

As is apparent from FIG. 1, no fluid passage is formed at each of the connection ends near the connection surfaces 16, 17 on the other side of the arc-shaped members 8, 9, and the liquid chambers 10, 11 are formed. There is no communication at this point. However, similar fluid passages 14 and 15 can be provided if necessary.

One end of each of the fluid passages 14 and 15 has a connection surface 1.
2 and 13 and a portion that bends at the other end and extends inward, with one end open to the liquid chamber 10 or 11. The fluid passage 14 is large and the fluid passage 15 provided in the arcuate member 9 is a small and large combination. The fluid passages 14 and 15 are connected at the junction of the connection surfaces 12 and 13 with the fluid passages 14 and 15 being different in size. are doing.

These fluid passages 14, 15 can be formed simultaneously with the formation of the arc-shaped grooves 8, 9 on the mold surfaces of the respective molds when the arc-shaped grooves 8, 9 are formed. However, it may be a hole that penetrates through the wall thickness, or it may be formed by machining.

Next, the operation of this embodiment will be described. As shown in FIG. 1, elastic partition walls 6 and 7 extending in opposite directions with the inner member 2 interposed therebetween are disposed toward the left and right sides of the vehicle body. When vibration is input to the sub frame mount from the left and right directions, one of the distal ends 6a, 7a of the elastic partition walls 6, 7 is compressed and elastically deformed.

This elastic deformation is increased in accordance with the magnitude of the input vibration because the tips 6a and 7a are tapered, and as a result, a variable spring rate characteristic that changes in accordance with the input vibration is obtained. As a result, it is possible to cope with the vibration in the left-right direction with the unique variable spring rate characteristic, and it is possible to give the subframe mount a remarkable direction.

When the inner member 2 relatively moves back and forth or obliquely due to front-back or oblique vibrations, the elastic partition walls 6 and 7 move together with the inner member 2, and at this time, the front end 6
a or 7a slides on the inner peripheral surface of the ring-shaped member 8 or 9.

However, since the inner surfaces of the ring-shaped members 8 and 9 are formed in an arc shape, the distal end portions 6a or 7a are gradually compressed and elastically deformed, again producing a variable spring rate characteristic. Therefore, the elastic partition walls 6 and 7 can exhibit a variable spring rate characteristic even when vibration is input in the front-back or oblique directions.

By forming the outer ends 6a and 7a at acute angles in this manner, the outer ends 6a and 7a have a directionality to absorb the input vibration applied from the extending direction of the elastic partition walls 6 and 7, and also have a direction according to the magnitude of the input vibration. The spring rate can be changed, and the inner peripheral surfaces of the arc-shaped members 8 and 9 can be slid so that a low dynamic spring can be realized. Moreover, the elastic partition wall 6,
Since 7 mainly absorbs the input vibration in the left-right direction, the directionality of vibration absorption can be obtained.

In addition, the sealing property of the sliding portion can be maintained at a high level by the seal projection 7b, and the arc-shaped grooves 8, 9 and the elastic partition wall 6 or 9 do not need to be collectively connected at a single point. It becomes easy to perform liquid-tight joining.

Next, another embodiment is shown in FIGS. These are all schematic diagrams shown in cross section corresponding to FIG.
Further, since there is only a partial change, only the changed part is denoted by a different code, and the other common parts of the first embodiment use the same code.

FIG. 5 relates to a second embodiment. In this embodiment, in the structure of the previous embodiment, the elastic partition walls 6, 7 protrude radially integrally from the inner member 2 at the respective inner member 2 side portions. The projection 2a is embedded and integrated, and the spring rate of this portion is increased.

In this way, when a large vibration that cannot be absorbed only by the elastic deformation at the distal end portions 6a and 7a of the elastic partition walls 6 and 7 is input, the portion is supported by the protruding portion 2a and has a high spring rate. By sufficiently absorbing this vibration, a variable spring rate characteristic having a wider change range can be exhibited.

FIG. 6 relates to a third embodiment. In this embodiment, the radius r is smaller than the general radius R on the inner peripheral surfaces of the ring-shaped members 8 and 9 by the sliding range of the tips 6a and 7a. Are inflection portions 20 and 21 of the curved surface.

In this way, when the elastic partition walls 6 and 7 move relatively back and forth or in the oblique direction together with the inner member 2, the amount of elastic deformation can be changed abruptly. it can.

The inflection portions 20 and 21 do not necessarily have to be formed in an arc shape, but may be formed of an appropriately non-arc-shaped curved surface such as an elliptic arc or a substantially V-shaped or step-shaped inclined surface. By appropriately selecting these inflection portion structures, various variable spring rate characteristics can be obtained.
In addition, if the structures of the left and right inflection portions 20 and 21 are different from each other, it is possible to obtain a directionality in which the left and right inflection portions 20 and 21 have different vibration absorption characteristics.

FIG. 7 relates to the fourth embodiment, in which the width of the elastic partition walls 6 and 7 is changed. In this example, the left elastic partition wall 6
To the wide width W1, and the right elastic partition wall 7 to the narrow width W2 (W
1> W2).

In this way, the variable spring rate characteristics in the left-right direction can be significantly different. In addition, it is possible to arbitrarily determine which of the right and left is widened and how much the right and left are different depending on the purpose of use.

FIG. 8 is an example in which the ring-shaped member is omitted according to the fifth embodiment. That is, the open portions of the arc-shaped grooves 4 and 5 are directly covered with the outer cylinder 1, and the tips 6 a and 7 a are in direct liquid-tight contact with the inner peripheral surface of the outer cylinder 1, respectively. Reference numeral 30 denotes an orifice passage.

In this manner, the outer cylinder 1 can be used as a ring-shaped member, and the ring-shaped member can be omitted, so that the number of parts can be reduced, the structure can be simplified, and the assembly can be facilitated.

FIG. 9 relates to a sixth embodiment, in which a single ring-shaped member 4 is used without using the two divided arc-shaped members 8 and 9 described above.
0 is used. In this case, one continuous annular groove is formed around the elastic vibration isolating member 3, and the inner member 2 and the elastic vibration isolating member 3 are configured to be divided into upper and lower portions, for example, by an arc-shaped groove portion. Assemble with the ring-shaped member 40 in between.

In this way, the assembling work can be performed in the same axial direction, so that the assembling work can be improved and the arc-shaped members divided into two do not need to be used. Therefore, these arc-shaped members are combined in a ring shape. This saves time and also improves the assembly workability in this respect. Reference numeral 41 denotes an orifice passage, which is formed on the surface or in the thickness of the ring-shaped member 40.

FIG. 10 is a diagram showing the damping characteristics obtained by the orifice passage composed of a combination of the large and small fluid passages 14 and 15 shown in the embodiments of FIGS. The solid line in the figure shows the general tendency of the damping characteristic obtained by the orifice passage, and the broken line shows the general tendency of the damping characteristic in the orifice passage composed of only the fluid passage corresponding to the small fluid passage 15 as a comparative example. Show.

As is apparent from this figure, according to the orifice passage constituted by the combination of the large and small fluid passages 14 and 15, broadening of the damping characteristics which cannot be expected with a single fluid passage can be realized. The damping effect by liquid column resonance is obtained in a wide frequency band.

The present invention is not limited to the above-described embodiment, but can be variously modified. For example, there are various anti-vibration members for automobiles, such as various engine mounts and suspension bushes, for use.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view passing through a liquid chamber of a subframe mount according to a first embodiment.

FIG. 2 is a top view thereof.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is an explanatory view of the assembly.

FIG. 5 is a schematic view showing a portion similar to FIG. 1 according to the second embodiment.

FIG. 6 is a schematic diagram similar to FIG. 5 according to a third embodiment.

FIG. 7 is a schematic diagram similar to FIG. 5 according to a fourth embodiment.

FIG. 8 is a schematic diagram similar to FIG. 5 according to a fifth embodiment.

FIG. 9 is a schematic diagram similar to FIG. 5 according to a sixth embodiment.

FIG. 10 is a damping characteristic diagram of an orifice passage combining large and small fluid passages.

[Explanation of symbols]

1: outer cylinder, 2: inner member, 3: elastic vibration isolator, 4: arc groove, 5: arc groove, 6: elastic partition wall, 6a: tip end,
7: elastic partition wall, 7a: tip, 7b: seal projection,
8: arc-shaped member, 9: arc-shaped member, 10: liquid chamber, 11:
Liquid chamber, 14: fluid passage, 15: fluid passage, 20: inflection portion, 21: inflection portion, 30: orifice passage, 40: ring-shaped member, 41: orifice passage

Claims (8)

[Claims] 1. An outer cylinder having a substantially cylindrical shape, an inner member arranged concentrically or eccentrically inside the outer cylinder, and an elastic vibration isolating member interposed between the outer cylinder and the inner member. The elastic vibration isolating member is provided with a liquid chamber concave portion that opens to the outer peripheral surface. The inner surface of the liquid chamber concave portion is covered with an arc-shaped outer peripheral wall, and an elastic partition for partitioning the liquid chamber concave portion. The walls are provided at symmetrical positions with the inner member interposed therebetween, and the inside of the liquid chamber recess is partitioned into a plurality of liquid chambers by bringing the distal end portions of these elastic partition walls that are radially outwardly into contact with the inner surface of the outer peripheral wall, In a liquid-sealed vibration isolator in which a liquid is sealed in each of these liquid chambers and the liquid chambers are communicated with each other by a fluid passage, the elastic partition wall has a tip portion that changes in a tapered shape outward in the radial direction, A liquid-sealed vibration isolator, wherein the distal end is slidably brought into contact with the inner surface of the outer peripheral wall. Location. 2. The liquid seal vibration isolator according to claim 1, wherein a seal projection is provided at a distal end portion of said elastic partition wall, and is elastically deformed to make sliding contact with an inner surface of said outer peripheral wall. 3. The liquid chamber recess is an annular groove formed in the outer periphery of the elastic vibration isolator and formed in a substantially annular shape, and the outer peripheral wall covers the opening of the annular groove in a ring shape. The liquid seal vibration isolator according to claim 1, wherein the device is a member. 4. The ring-shaped member is composed of a pair of arc-shaped members divided into a semi-circular shape, and a joining portion of the two ring-shaped members is shifted in a circumferential direction from a position where a tip end of the elastic partition wall comes into contact. The liquid-sealed vibration isolator according to claim 3, wherein the liquid-sealed vibration isolator is disposed. 5. The liquid ring vibration isolator according to claim 1, wherein a harder core member is integrated on the inner member side of said elastic partition wall. 6. The liquid seal according to claim 1, wherein only a portion of the inner surface of the outer peripheral wall, at which a tip end of the elastic partition wall slides, is an inflection portion different from other portions. Anti-vibration device. 7. The liquid ring vibration isolator according to claim 1, wherein each of the pair of elastic partition walls has a different spring characteristic from the other. 8. The liquid ring vibration isolator according to claim 1, wherein said outer peripheral wall is an outer cylinder.