JP2024038695A - Vibration control device - Google Patents

Abstract

To form a vibration control device in a manner that enables restriction on displacement in a specific direction.SOLUTION: A liquid seal mount M is attached to an area between a supporting body B and a supported body and includes: a core part 1 attached to the supporting body B; an attachment part 2 attached to the supported body; a connected part 3 which is provided at a position spaced apart from the core part 1 in an upward direction, integrated with the attachment part 2, and provided with a cavity 3a penetrating in a vertical direction; an elastic part 4 which encloses a space S1 between the core part 1 and the connected part 3 along a circumferential direction of an inner periphery part of the cavity 3a and connects the core part 1 with the inner periphery part of the cavity 3a; and a bracket 6 which is attached to the supporting body B and restricts relative displacement between the core part 1 and the connected part 3.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vibration isolator.

Patent Document 1 discloses a first mounting member, a second mounting member, an insulator that connects the first mounting member and the second mounting member, and an insulator that is formed by utilizing the inner space of the insulator, and that a working fluid is injected into the insulator. a vibration isolation unit including a liquid chamber to be sealed, a partition member that partitions the liquid chamber into a main liquid chamber and a sub-liquid chamber, and a housing space provided on the second mounting member and into which the vibration isolation unit enters. A liquid-sealed vibration isolator is disclosed. The liquid-sealed vibration isolator includes an outer cylindrical part that is provided on the second mounting member and to which the insulator is fixed, and a fixing part that protrudes from the outer surface of the outer cylindrical part toward the vibration source. The fixing part is provided with a bolt fixing part for fixing to the vibration source, and a part of the housing space extends to the fixing part.

Patent No. 6615485

By the way, if a vibration isolator mounted on a vehicle vibrates with a large amplitude due to the vibration of a vibration source, the riding comfort of the vehicle will deteriorate, so it is desirable to limit the displacement of the vibration isolator so that it does not vibrate with a large amplitude. Further, depending on the vehicle, it may be desired to particularly restrict displacement of the vibration isolator in a specific direction. However, due to reasons such as vehicle design, it may be difficult to configure the displacement in a specific direction.

The present invention has been made in view of the above, and an object of the present invention is to configure a vibration isolator so as to be able to limit displacement in a specific direction.

A first aspect of the present invention is a vibration isolator installed between a support and a supported object, at least one of which vibrates, including a core portion having rigidity attached to the support, and a core section attached to the supported object. , a rigid attachment part, and a rigid connected part provided at a position away from the core part to one side in the Z direction and integral with the attachment part, and provided with a cavity penetrating in the Z direction. an elastic part that surrounds the space between the core part and the connected part along the circumferential direction of the inner peripheral part of the cavity and connects the core part and the inner peripheral part of the cavity; and a limiting member attached to the support body to limit relative displacement of the core portion and the connected portion, and two directions perpendicular to the Z direction and perpendicular to each other are the X direction and the Y direction. In this case, the length of the connected portion in the Y direction is longer than the length in the X direction, and the limiting member includes a pair of stoppers provided on one side of the connected portion in the X direction and on the other side of the connected portion in the X direction. The pair of stoppers abuts either end of the connected portion in the X direction when the connected portion is displaced relative to the core portion in the X direction. Limit displacement of the joint.

In this first invention, since the length of the connected portion in the Y direction is longer than the length in the X direction, the space that is not occupied by the connected portion is wider in the X direction than in the Y direction. Therefore, it is easy to provide a pair of stoppers on one side and the other side in the X direction by utilizing a large space in the X direction. When the connected part is displaced in the X direction with respect to the core part, the connected part comes into contact with both ends of the connected part in the X direction, and the displacement of the connected part is restricted. In this way, the vibration isolator can be configured to limit displacement in the X direction.

A second invention according to the first invention includes a liquid seal part that closes the space surrounded by the elastic part between the core part and the connected part from one side in the Z direction, and the vibration-proofing part The device is a liquid seal mount in which the space blocked by the liquid seal part serves as a main liquid chamber, and inside the liquid seal part there is a space as a sub liquid chamber and an inner peripheral part of the cavity. A liquid flow path is provided that extends along the circumferential direction and connects the main liquid chamber and the auxiliary liquid chamber.

This second invention relates to a liquid seal mount that is provided with a main liquid chamber, a sub-liquid chamber, and a liquid flow path that communicates these. For liquid seal mounts, it may be desirable to lengthen the liquid flow path in order to damp vibrations in the low frequency range. In the second invention, since the length of the connected portion in the Y direction is longer than the length in the X direction, the flow path extending along the circumferential direction of the inner peripheral portion of the cavity can also be easily lengthened in the Y direction. Therefore, the vibration isolator can be configured to be able to limit displacement in the X direction, and can also be a liquid seal mount that easily damps vibrations in the low frequency range.

A third invention is based on the first or second invention, wherein the connected portion is provided on one side of the attachment portion in the Y direction, and the limiting member is provided on one side of the connected portion in the X direction and a pair of fixing parts fixed to the support body provided on the other side; and a pair of fixing parts provided on one side in the Z direction of the pair of fixing parts, one side in the X direction and the other side in the X direction of the connected part. the pair of stoppers covering the sides; a first reinforcing portion provided on one side of the connected portion in the Z direction and connecting the pair of stoppers with each other; and a first reinforcing portion provided on one side of the connected portion in the Y direction; and a second reinforcing portion that connects the pair of stoppers to each other.

In this third invention, the pair of stoppers that limit the relative displacement of the core portion and the connected portion are reinforced by the first reinforcing portion and the second reinforcing portion, and therefore have high strength. Further, since the second reinforcing portion is provided on one side of the connected portion in the Y direction, displacement of the connected portion relative to the core portion in the Y direction can also be restricted.

As described above, according to the present invention, the vibration isolator can be configured to limit displacement in a specific direction.

FIG. 2 is a perspective view showing the liquid seal mount according to the embodiment from the front right. FIG. 2 is a perspective view showing the liquid seal mount according to the embodiment from the rear left. 3 is a sectional view taken along line III-III in FIG. 2. FIG. 3 is a sectional view taken along line IV-IV in FIG. 2. FIG. It is a top view showing a core part, an attaching part, and a connected part from above. 6 is a sectional view taken along line VI-VI in FIG. 5. FIG.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its applications or its uses.

(Embodiment)
1 to 4 show a liquid seal mount M which is an embodiment of a vibration isolator according to the present invention. The liquid seal mount M is attached between a transmission (supported body) that transmits the power of the engine and a support body B that is a part of the vehicle body that supports the engine and transmission below. Hereinafter, the front-back direction (X direction), the left-right direction (Y direction), and the up-down direction (Z-direction) mean the front-back direction, left-right direction, and up-down direction of the vehicle, respectively.

3 shows a cross section cut along the Y direction and Z direction in FIGS. 1 and 2 (hereinafter referred to as "YZ cross section"), and FIG. 4 shows a cross section taken along the Z direction and X direction in FIGS. 1 and 2. A cross section (hereinafter referred to as "ZX cross section") cut along a cross section is shown.

The liquid seal mount M has a core part 1 fixed to the support body B, a mounting part 2 fixed to the transmission, and is provided at a position away from the core part 1 upwards (to one side in the Z direction), and is mounted on the right side. The connected portion 3 is integrated with the portion 2. Moreover, the liquid seal mount M surrounds the space S1 between the core part 1 and the connected part 3, and the elastic part 4 that connects the core part 1 and the connected part 3, and the space between the core part 1 and the connected part 3. A liquid seal part 5 is provided that closes a space S1 surrounded by the elastic part 4 from above. Further, the liquid seal mount M includes a bracket 6 (limiting member) that covers the upper part, the front (one side in the X direction), the rear (the other side in the X direction), and the left side (one side in the Y direction) of the connected part 3. The core part 1, the attachment part 2, the connected part 3, and the bracket 6 are all rigid, for example, made of resin or metal, and the elastic part 4 is elastic, for example, made of rubber. .

FIG. 5 shows the core part 1, the attachment part 2, and the connected part 3 seen from above. In addition, in FIG. 5, only the outer shape of the core portion 1 is shown by a broken line.

-Core part-
As shown by the broken line in FIG. 5, the core portion 1 has a substantially elliptical outer shape when viewed from above with its long axis extending in the left-right direction. In the outer shape of the core section 1 when viewed from above, a pair of end portions facing each other in the front-rear direction are each formed into a straight line extending in the left-right direction, and a pair of end portions facing each other in the left-right direction are shaped like a core viewed from above. It is formed in an arc shape with the center of part 1 as the center of the circle.

As shown in FIGS. 3 and 4, the core portion 1 is formed so that the length in the left-right direction and the length in the front-back direction both gradually become smaller as they go upward. Therefore, the outer circumferential portion of the core portion 1 approaches the center line C (see the dashed-dotted line in FIGS. 3 and 4), which will be described later, as it goes upward at a portion near the upper end facing the connected portion 3. It has an inclined outer peripheral surface 1a.

Two holes 1b, 1b are formed through the core part 1 and the support body B in the vertical direction to be fixed to each other with bolts.

-Mounting part-
The attachment part 2 is provided on the right side of the core part 1. As shown in FIG. 1, the mounting part 2 includes a central part 21 having the highest height in the vertical direction, and a front part 22 and a rear part whose height gradually decreases from the central part 21 toward the front and rear, respectively. It has 23. The height of the central portion 21 in the vertical direction is three times or more higher than the height of the core portion 1 in the vertical direction, and the length of the entire attachment portion 2 in the front-rear direction is three times or more longer than the length of the core portion 1 in the front-rear direction.

The front part 22 and the rear part 23 are provided with holes 22a and 23a in their lower portions, respectively, through which bolts are inserted for attachment to the transmission. A connecting portion 24 is provided between the front portion 22 and the rear portion 23 to connect the two in the front-rear direction. The connecting portion 24 is formed to extend in the front-rear direction, and is integrally connected to the front portion 22 at the front side and integrally connected to the rear portion 23 at the rear side. A hole 24a is provided in the center of the connecting portion 24 in the front-rear direction, through which a bolt is inserted for attachment to the transmission.

-Connected part-
The connected portion 3 is provided above the core portion 1 and to the left of the central portion 21 of the attachment portion 2 . The connected portion 3 has a substantially rectangular outer shape when viewed from above. The connected portion 3 is formed so that the length in the left-right direction is longer than the length in the front-back direction. The connected portion 3 is provided with a cavity 3a above the attachment portion 2 and penetrating in the vertical direction. The shape of the cavity 3a when viewed from above is an enlarged shape of the outer shape of the core portion 1 when viewed from above, as shown in FIG. That is, the shape of the cavity 3a viewed from above is a substantially elliptical shape with the long axis direction in the left-right direction. When viewed from above, the cavity 3a has a pair of inner peripheral portions facing each other in the front-rear direction and each having a linear shape extending in the left-right direction. When the cavity 3a is viewed from above, a pair of inner circumferential parts facing each other in the left-right direction are formed in an arc shape with the center of the cavity 3a as the center of the circle. The cavity 3a has a length in the left-right direction that is longer than a length in the front-back direction, and is larger than the outer shape of the core portion 1 in both the front-back direction and the left-right direction.

FIG. 6 shows a YZ cross section (VI-VI cross section in FIG. 5) showing only the mounting portion 2 and the connected portion 3 in FIG. The inner circumferential portion of the cavity 3a has a coupling portion 31 coupled by the elastic portion 4. As can be seen from FIGS. 3 and 4, the coupling portion 31 is provided at a lower portion of the inner peripheral portion of the cavity 3a. As shown in FIGS. 3 to 5, the upper end portion of the coupling portion 31 protrudes toward the inner circumference over the entire circumference of the cavity 3a than the upper portion (the portion other than the coupling portion 31) of the inner circumference.

The names of each part are defined as follows. A pair of portions facing each other in the left-right direction in the coupling portion 31 shown in FIGS. 3 and 6 are referred to as a pair of first coupling portions 31a, 31a. The portions of the coupling portion 31 shown in FIG. 4 that face each other in the front-rear direction are referred to as a pair of second coupling portions 31b, 31b. The lowest end of each first coupling portion 31a is defined as a first end 31c. The lowest end of each second joint 31b is defined as a second end 31d. Further, a center line C is a straight line passing through the center of the cavity 3a and extending in the vertical direction.

Each first coupling portion 31a has a protrusion portion 32 that protrudes toward the core portion 1, as shown in FIG. Each protruding part 32 protrudes so that the distance to the core part 1 becomes shorter toward the tip end 32a. As shown in FIG. 5, each protrusion 32 is provided along the circumferential direction of a pair of arcuate portions facing each other in the left-right direction on the inner peripheral portion of the cavity 3a.

As shown in FIG. 4, each of the second coupling portions 31b has an inclined surface 33 which is inclined downwardly and away from the center line C. Each inclined surface 33 is provided at a pair of linear portions extending in the left-right direction and facing each other in the front-rear direction on the inner peripheral portion of the cavity 3a.

As can be seen from FIG. 6, the pair of first ends 31c, 31c are both located below the pair of second ends 31d, 31d. Therefore, a step St is formed in the vertical direction between the first ends 31c, 31c and the second ends 31d, 31d.

-Elastic part-
As shown in FIGS. 3 and 4, the elastic part 4 connects the coupling part 31 at the inner peripheral part of the connected part 3 with the outer peripheral part of the core part 1 and the upper surface of the core part 1. The elastic portion 4 is formed into a thick substantially bowl shape. The elastic part 4 is provided so as to surround the entire circumference of the space S1 between the core part 1 and the connected part 3 along the circumferential direction of the inner peripheral part of the cavity 3a of the connected part 3. The elastic part 4 extends from the coupling part 31 at the inner peripheral part of the cavity 3a of the connected part 3 so as to approach the center line C as it goes downward.

When the core part 1 and the connected part 3 vibrate with each other, the elastic part 4 absorbs the vibration. When the core part 1 and the connected part 3 vibrate relative to each other in the front-back direction, the vibration is more easily absorbed than when the core part 1 and the connected part 3 vibrate relative to each other in the left-right direction. . That is, the elastic portion 4 is softer in the front-rear direction than in the left-right direction.

-Liquid seal part-
As shown in FIGS. 3 and 4, the liquid seal part 5 closes the upper part of the space S1 in the cavity 3a surrounded by the elastic part 4, thereby making the space S1 the main liquid chamber. Inside the liquid sealing part 5, as described later, there is a space S2 as a sub-liquid chamber, which extends along the circumferential direction of the inner circumference of the cavity 3a, and communicates the sub-liquid chamber S2 with the main liquid chamber S1. A liquid flow path S3 is provided.

The liquid seal section 5 includes a lower plate 51, a membrane 52, an upper plate 53, a diaphragm 54, and a ring 55. The lower plate 51, the membrane 52, the upper plate 53, the diaphragm 54, and the ring 55 have an approximately elliptical outer shape along the circumferential direction of the inner periphery of the cavity 3a when viewed from above. The lower plate 51, the upper plate 53, and the ring 55 are all made of metal, for example, and are rigid, and the membrane 52 and the diaphragm 54 are all made of rubber.

The lower plate 51, the membrane 52, the upper plate 53, and the diaphragm 54 are provided in this order from the bottom to the top above the space S1 surrounded by the elastic part 4. The lower plate 51 has a bottom portion 51a and an outer peripheral portion 51b surrounding the outer periphery of the bottom portion 51a. A downwardly depressed concave portion 51c is provided on the upper surface of the bottom portion 51a. The outer peripheral part 51b of the lower plate 51 is provided on the outer peripheral side of the bottom part 51a and above the bottom part 51a. Therefore, the upper surface of the outer peripheral part 51b is located above the upper surface of the bottom part 51a, and the space above the bottom part 51a is surrounded by the outer peripheral part 51b. A groove extending in the circumferential direction is provided on the upper surface of the outer peripheral portion 51b.

The membrane 52 is accommodated in the recess 51c of the lower plate 51. The upper plate 53 has an outer shape that is substantially the same as the inner peripheral surface of the outer peripheral portion 51b of the lower plate 51 when viewed from above. The upper plate 53 is disposed in a space above the bottom portion 51a and surrounded by the outer peripheral portion 51b of the lower plate 51.

The diaphragm 54 is a thin plate having a substantially uniform thickness that is curved in a wavy manner in the YZ cross section and the ZX cross section, and is provided so as to cover the upper side of the upper plate. A space S2 serving as a sub-liquid chamber is formed between the upper plate 53 and the diaphragm 54 and extends all the way around the diaphragm 54 in the circumferential direction. The outer shape of the diaphragm 54 when viewed from above is approximately the same as the outer shape of the outer peripheral portion 51b of the lower plate 51. The diaphragm 54 is provided with a raised portion in which the entire thickness direction of the diaphragm 54 is raised upward at a portion that overlaps the groove of the outer peripheral portion 51b of the lower plate 51 above. The lower surface side of the raised portion is a groove obtained by vertically inverting the groove on the outer peripheral portion 51b of the lower plate 51, and the upper surface side of the raised portion projects upward. The grooves on the outer circumference 51b of the lower plate 51 and the grooves on the lower surface of the diaphragm 54 are integrated at the top and bottom to form a liquid flow path S3. The flow path S3 communicates with the main liquid chamber S1 and the sub liquid chamber S2.

The ring 55 is formed in an annular shape extending along the circumferential direction of the outer peripheral portion 51b of the lower plate 51. A groove corresponding to the raised part is provided on the lower surface of the ring 55, and the raised part of the diaphragm 54 fits into the groove from below.

-bracket-
The bracket 6 has a pair of first fixing parts 61, 61 fixed to the support body B. The first fixing parts 61, 61 are formed in a substantially rectangular plate shape when viewed in the vertical direction, and are provided in front and rear of the connected part 3, respectively. Each first fixing part 61 is provided with holes 61a, 61a penetrating in the vertical direction, through which bolts are inserted and fixed to the vehicle body B.

The bracket 6 has a pair of wall parts 62, 62 (stoppers) provided above the pair of first fixing parts 61, 61, in front and behind the connected part 3. The pair of wall portions 62, 62 are continuous with the rear end portion of the first fixing portion 61 on the front side and the front end portion of the first fixing portion 61 on the rear side, respectively, and protrude upward. The pair of wall portions 62, 62 are formed in a rectangular shape that is long in the left-right direction when viewed in the front-rear direction. The pair of wall portions 62, 62 cover the front side of the front end portion and the rear side of the rear end portion of the connected portion 3, respectively. When the connected part 3 is displaced in the front-rear direction with respect to the core part 1, the pair of wall parts 62, 62 contact the front end and the rear end of the connected part 3, respectively, and displace the connected part 3. Functions as a pair of stoppers to limit the

The bracket 6 has a first reinforcing portion 63 that is provided above the connected portion 3 and connects the pair of wall portions 62, 62 to each other. The first reinforcing portion 63 is formed in a substantially rectangular shape when viewed in the vertical direction, and is continuous from the upper end of the front wall portion 62 to the upper end of the rear wall portion 62. The first reinforcing portion 63 covers the upper part of the connected portion 3 .

The bracket 6 has a second reinforcing portion 64 provided on the left side of the connected portion 3 and connecting the pair of wall portions 62, 62 to each other. The second reinforcing portion 64 is formed in a substantially rectangular shape when viewed in the left-right direction, and is continuous from the left end of the front wall 62 to the left end of the rear wall 62. The upper end portion of the second reinforcing portion 64 is formed continuously with the left end portion of the first reinforcing portion 63. The second reinforcing portion 64 covers the left side of the connected portion 3.

The bracket 6 has a second fixing part 65 and a third fixing part 66 fixed to the support body B. The second fixing part 65 is formed in a plate shape and protrudes in the upper left direction from the connection part between the left end part of the first reinforcing part 63 and the upper end part of the second reinforcing part 64, which extends in the front-rear direction. The third fixing part 66 is formed in the shape of a flat plate in the front-rear direction and the left-right direction, protruding in the right rear direction from the connection part with the upper end part of the rear wall part 62 at the right rear end part of the second reinforcing part 64. ing. The second fixing part 65 and the third fixing part 66 are respectively provided with holes 65a and 66a penetrating in the thickness direction for inserting bolts and fixing them to the vehicle body B.

―Actions and effects of embodiments―
In this embodiment, since the length of the connected portion 3 in the left-right direction is longer than the length in the front-back direction, the space that is not occupied by the connected portion 3 is larger in the front-rear direction than in the left-right direction. Therefore, it is easy to provide the pair of wall portions 62, 62 as stoppers in the front-back direction by utilizing the wide space in the front-back direction. When the connected portion 3 is displaced in the front-back direction with respect to the core portion 1, the connected portion 3 comes into contact with both ends of the connected portion 3 in the front-back direction, and the displacement of the connected portion 3 is restricted. In this way, the liquid seal mount M can be configured to be able to restrict displacement in the front-rear direction.

In the liquid mount M, it may be necessary to lengthen the liquid flow path in order to damp vibrations in the low frequency range. In this embodiment, the left-right length of the connected portion 3 is longer than its front-to-rear length, so the flow path S3 that extends along the circumferential direction of the inner periphery of the cavity 3a can also be easily lengthened in the left-right direction. According to this embodiment, the liquid mount M can be configured to limit displacement in the front-to-rear direction, and can also easily damp vibrations in the low frequency range.

In this embodiment, the pair of walls 62, 62 that limit the relative displacement of the core part 1 and the connected part 2 are reinforced by the first reinforcing part 63 and the second reinforcing part 64, and therefore have high strength. Further, since the second reinforcing portion 64 is provided on the left side of the connected portion 3, displacement of the connected portion 2 to the left with respect to the core portion 1 can also be restricted.

By the way, since a vehicle is susceptible to vibrations in the longitudinal direction when the vehicle starts and stops, there are cases where it is desired to particularly absorb the longitudinal vibrations with the liquid seal mount M. The liquid seal mount M according to this embodiment easily absorbs vibrations in the front-rear direction as described above, and is therefore particularly useful as a liquid seal mount M that easily absorbs vibrations in the front-rear direction.

In addition, the liquid seal mount M according to this embodiment is designed to meet the targets set by the 2030 Agenda for Sustainable Development, which was unanimously adopted by member states at the United Nations Summit in September 2015. Of the Sustainable Development Goals (SDGs), which are international goals aimed at creating a sustainable and better world, Goal 9 “Create a foundation for industry and technological innovation” and Goal 12 “Responsible production and consumption” I can contribute to the achievement.

Other Embodiments
The vibration isolation device according to the present invention is not limited to the hydraulic mount M, but may be any device that is mounted between a support and a supported object, at least one of which vibrates.

In the embodiment, the X direction, the Y direction, and the Z direction correspond to the front-rear direction, left-right direction, and up-down direction of the vehicle, respectively, but the present invention is not limited thereto. Two directions perpendicular to each other are sufficient.

Moreover, the liquid seal mount M of the embodiment may be configured upside down. That is, the connected portion 3 may be located below the core portion 1, and the elastic portion 4 may extend upward from the connected portion 3 so as to approach the center line C.

Moreover, the liquid seal mount M of the embodiment may be rotated by 90 degrees with the Z direction as the rotation axis. That is, the liquid seal mount M may be arranged so that the front-rear direction of the above embodiment faces the left-right direction, and the left-right direction of the above embodiment faces the front-rear direction.

Furthermore, the configuration of the limiting member is not limited to the configuration of the bracket 6 of the embodiment described above. The limiting member may be a bracket that does not have one or both of the first reinforcing part 63 and the second reinforcing part 64. Further, the limiting member is provided on one side in the X direction and the other side in the X direction of the connected part 3, and comes into contact with both ends of the connected part 3 in the X direction to limit displacement of the connected part 3 in the X direction. , it is sufficient to have a pair of stoppers, so it does not need to be a bracket.

INDUSTRIAL APPLICABILITY The present invention is useful as a vibration isolator.

M Liquid seal mount (vibration isolator)
B Support body 1 Core part 2 Mounting part 3 Connected part 3a Cavity 4 Elastic part 5 Liquid seal part S1 Space (main liquid chamber)
S2 space (auxiliary liquid chamber)
S3 Flow path 6 bracket (limiting member)
62 Wall part (stopper)
63 First reinforcement part 64 Second reinforcement part

Claims (3)

A vibration isolator installed between a support and a supported body, at least one of which vibrates,
a rigid core portion attached to the support;
a rigid attachment part attached to the supported body;
a rigid connected part provided at a position away from the core part to one side in the Z direction and integral with the attachment part, the connected part having a cavity penetrating in the Z direction;
an elastic part that surrounds the space between the core part and the connected part along the circumferential direction of the inner peripheral part of the cavity and connects the core part and the inner peripheral part of the cavity;
a limiting member attached to the support body and limiting relative displacement of the core portion and the connected portion;
When two directions perpendicular to the Z direction and perpendicular to each other are defined as the X direction and the Y direction, the length of the connected portion in the Y direction is longer than the length in the X direction,
The limiting member has a pair of stoppers provided on one side in the X direction and the other side in the X direction of the connected portion,
The pair of stoppers is configured to abut either one of the ends of the connected portion in the X direction when the connected portion is displaced relative to the core portion in the X direction, thereby stopping the connected portion. Vibration isolator that limits displacement. The vibration isolator according to claim 1,
comprising a liquid seal portion that closes the space surrounded by the elastic portion between the core portion and the connected portion from one side in the Z direction;
The vibration isolator is a liquid seal mount whose main liquid chamber is the space blocked by the liquid seal part,
Inside the liquid sealing section,
A space as a secondary liquid chamber,
A vibration isolating device, further comprising: a liquid flow path extending along a circumferential direction of an inner peripheral portion of the cavity and communicating the main liquid chamber and the sub liquid chamber. The vibration isolator according to claim 1 or 2,
The connected portion is provided on one side of the mounting portion in the Y direction,
The limiting member is
a pair of fixing parts fixed to the support body, each of which is provided on one side in the X direction and the other side in the X direction of the connected part;
the pair of stoppers, each of which is provided on one side of the pair of fixing parts in the Z direction and covers one side of the connected part in the X direction and the other side of the connected part;
a first reinforcing portion provided on one side of the connected portion in the Z direction and connecting the pair of stoppers to each other;
and a second reinforcing part provided on one side of the connected part in the Y direction and connecting the pair of stoppers to each other.