JP2007333179A - Hydraulic vibration isolator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hydraulic vibration isolator by which vibration-isolation effect is adequately exerted without complicating the device for suppression of occurrence of cavitation. <P>SOLUTION: A rubbery elastic-body wall-part 10g is formed in the state of being separated from an inner wall. In the case of small-amplitude vibration as shown in Fig.(A), the flow velocity in an orifice path 10c is low and, a pressure drop is small, thus the rubbery elastic-body wall-part 10g does not narrow down the flow path. In the case of large-amplitude vibration as shown in Fig.(B), the flow velocity becomes higher than that in the case of small-amplitude vibration and the pressure drop is large, thus the rubbery elastic-body wall-part 10g is protruded to narrow down the orifice path 10c. As a result, resonance is hard to occur, or does not occur, a large change in the low-pressure side is not caused in the pressure-receiving chamber 14, and occurrence of cavitation is suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid-filled vibration isolator used for an engine mount for automobiles.

  There is known a liquid-filled vibration isolator having a pressure receiving chamber (main liquid chamber) and an equilibrium chamber (sub-liquid chamber) in which liquid is enclosed, and communicating these through an orifice passage (for example, Patent Document 1). , 2). In these liquid-filled vibration isolators, during normal small-amplitude vibrations, vibration is prevented by the resonance phenomenon of liquid reciprocating flow in the orifice passage.

  However, when large-amplitude vibration in which a negative pressure larger than normal occurs in the main liquid chamber, Patent Document 1 checks to prevent abnormal noise and impact due to water hammer when the cavitation generated in the main liquid chamber collapses or disappears. The valve is opened, and the main liquid chamber and the sub liquid chamber communicate with each other without passing through the orifice passage. As a result, resonance in the orifice passage is eliminated, and a sudden pressure change in the main liquid chamber is alleviated, and the occurrence of cavitation can be suppressed.

In Patent Document 2, when a negative pressure larger than normal is generated in the main liquid chamber, a part of a rubber partition member that separates the main liquid chamber and the sub liquid chamber is opened, so that the entire side surface of the orifice passage is opened. Opens into the secondary liquid chamber, and there is almost no flow resistance in the orifice passage. As a result, resonance in the orifice passage is eliminated, and a sudden pressure change in the main liquid chamber is alleviated, and cavitation can be suppressed.
Japanese Patent Laying-Open No. 2005-48906 (page 5-6, FIG. 1) JP 2004-251431 A (6th page, FIGS. 2 and 3)

However, in the technique of Patent Document 1, it is necessary to provide a check valve, which complicates the apparatus and causes an increase in cost.
In the technique of Patent Document 2, it is difficult to sufficiently improve the sealing performance by the partition member, and liquid leakage always tends to occur from the orifice passage to the side of the sub liquid chamber. There is a risk that it will be degraded.

  An object of the present invention is to provide a liquid-filled vibration isolator capable of sufficiently producing an anti-vibration effect without complicating the apparatus for suppressing the occurrence of cavitation.

In the following, means for achieving the above object and its effects are described.
The liquid-filled vibration isolator according to claim 1 is connected by the main rubber elastic body by the main rubber elastic body forming a part of the wall portion and the liquid being sealed inside. The pressure receiving chamber in which the hydraulic pressure fluctuates due to the vibration generated between the two mounting members, the liquid is sealed inside, and the flexible film forms a part of the wall. A liquid-filled vibration isolator comprising an equilibrium chamber in which a volume change is allowed based on deformation of a flexible membrane, and an orifice passage communicating the pressure receiving chamber and the equilibrium chamber with each other, the orifice passage The inner wall is formed with a rubber-like elastic wall portion that protrudes into the orifice passage and narrows the passage in response to a pressure drop in the orifice passage caused by the flow rate of the liquid.

  A rubber-like elastic body wall portion is formed on the inner wall of the orifice passage. The rubber-like elastic wall portion protrudes almost into the orifice passage because the flow rate of the liquid flowing in the orifice passage is low during normal small amplitude vibration, and the pressure drop in the orifice passage with respect to the rubber-like elastic wall portion is small. Without narrowing the flow path. Therefore, at the normal time, the vibration can be sufficiently prevented by the resonance phenomenon of the liquid reciprocating flow in the orifice passage.

  However, since the flow velocity of the liquid flowing in the orifice passage increases during large amplitude vibration, the pressure drop in the orifice passage with respect to the rubber-like elastic body wall increases, so the rubber-like elastic wall portion protrudes into the orifice passage and flows. Narrow the road. Accordingly, the resonance characteristics change, and resonance in the orifice passage that is normally possible is less likely to occur or will not occur. For this reason, the pressure fluctuation in the pressure receiving chamber is suppressed as compared with the case where resonance occurs, and the peak on the low pressure side becomes relatively high. As a result, the occurrence of cavitation is suppressed, and abnormal noise and impact due to water hammer when cavitation collapses or disappears can be prevented. In the case of large amplitude vibration, there is a vibration isolation effect due to the flow resistance of the orifice passage itself even if resonance does not occur in the orifice passage.

  Thus, the liquid-filled vibration isolator of the present invention suppresses the occurrence of cavitation by providing the above-mentioned rubber-like elastic body wall, so that the apparatus is not complicated and the vibration isolating effect is It can be generated sufficiently.

  According to a second aspect of the present invention, in the liquid-filled vibration isolator, in the first aspect, the rubber-like elastic body wall portion is formed as a rubber-like elastic body film that is separated from the inner wall of the orifice passage. When the elastic film is lifted from the inner wall of the orifice passage, the flow path of the orifice passage is narrowed.

Thus, the rubber-like elastic film in the peeled state floats from the inner wall of the orifice passage, so that the flow path of the orifice passage can be narrowed, and can be realized with an extremely simple configuration.
According to a third aspect of the present invention, there is provided a liquid filled vibration isolator according to the second aspect, wherein a vent hole is formed in an inner wall of the orifice passage in which the rubber-like elastic film is disposed. It is introduced as an external pressure of the rubber-like elastic film.

  In particular, by providing the vent hole so as to open on the inner wall of the orifice passage and applying atmospheric pressure as the external pressure of the rubber-like elastic membrane, the rubber-like elastic membrane can be lifted from the inner wall of the orifice passage more reliably and stably. Can be made.

  The liquid-filled vibration isolator according to claim 4 is the liquid-filled vibration isolator according to any one of claims 1 to 3, wherein the orifice passage uses a rigid orifice member main body in which a passage space having one open side is formed. The rubber-like elastic wall portion is formed by covering the one side surface of the passage space with a rubber-like elastic film.

Thus, the rubber-like elastic body wall portion can be easily formed by covering one side of the passage space in the orifice member main body with the rubber-like elastic body film.
6. The liquid-filled vibration isolator according to claim 5, wherein the orifice member main body is on the one side surface side with respect to the inner surface of the mounting member that forms the pressure receiving chamber and the equilibrium chamber inside. And the rubber elastic film is sandwiched between the one side surface and the inner surface of the mounting member, so that the one side surface of the passage space is covered with the rubber elastic film. It is characterized by.

  Thus, a rubber-like elastic body film can be formed simply by sandwiching the rubber-like elastic film between one side surface of the passage space in the orifice member body and the inner surface of the mounting member. A rubber-like elastic body wall can be easily formed with the configuration.

  The liquid filled vibration isolator according to claim 6, wherein the rubber-like elastic film is bonded to the one side surface of the passage space at the orifice member body. It is characterized by.

  As described above, the rubber-like elastic film may be bonded to one side of the passage space in the orifice member main body by bonding or the like, and is reliably integrated as a rubber-like elastic wall portion with respect to the orifice member main body. it can.

[Embodiment 1]
FIG. 1 is a longitudinal sectional view of an automobile engine mount 2 (corresponding to a liquid-filled vibration isolator) to which the above-described invention is applied. The engine mount 2 is formed in a state where two mounting brackets 4 and 6 (corresponding to mounting members) are connected by a main rubber elastic body 8. The upper mounting bracket 4 which is one of the two mounting brackets 4 and 6 is mounted on the engine side, and the other lower mounting bracket 6 is mounted on the vehicle body side. As a result, the engine is supported in a vibration-proof state with respect to the vehicle body.

The upper mounting bracket 4 has a disk shape, and is attached with a bolt 4a for fixing the engine and a positioning pin 4b.
The lower mounting bracket 6 has a substantially cylindrical shape with a bottom, and includes a cylindrical member 6a and a bottom member 6b. Since the main rubber elastic body 8 is vulcanized and bonded between the inner surface of the cylindrical member 6a and the bottom surface of the upper mounting bracket 4, the upper mounting bracket 4 and the cylindrical member 6a are interposed via the main rubber elastic body 8. Are integrated.

  The lower end portion of the cylindrical member 6a and the upper peripheral edge of the bottom member 6b are integrated by caulking. In the caulking portion, the orifice member 10 and the diaphragm member 12 are sandwiched and fixed at the peripheral portion of the caulking portion. The bottom member 6b is provided with a mounting bolt 6c to the vehicle body on the bottom surface side, and a through hole 6d is formed on the side surface to open the space below the diaphragm member 12 to the atmosphere.

  The orifice member 10 mainly forms the caulking portion 10a and the abutting portion 10b over the entire circumference by bending the peripheral portion of the metal plate. As described above, the caulking portion 10a is in close contact with the inner surface of the main rubber elastic body 8 by being clamped between the cylindrical member 6a and the bottom member 6b during caulking. At the same time, the diameter of the cylindrical member 6a is slightly reduced by caulking so that the tip of the contact portion 10b is in close contact with the inner surface of the main rubber elastic body 8. As a result, a ring-shaped space having a substantially triangular cross section is formed between the caulking portion 10a and the abutting portion 10b, and this ring-shaped space serves as an orifice passage 10c.

  A liquid is sealed in the space between the orifice member 10 and the main rubber elastic body 8 to form a pressure receiving chamber 14. A liquid is sealed in a space between the orifice member 10 and the diaphragm member 12 which is a flexible film to form an equilibrium chamber 16. One through hole 10d is formed in the contact portion 10b of the orifice member 10, and one through hole 10e is formed on the caulking portion 10a side adjacent to the through hole 10d. The through holes 10d and 10e are separated from each other by a partition wall 10f that closes the orifice passage 10c at one place. As a result, the equilibrium chamber 16 and the pressure receiving chamber 14 are in communication with each other through the through hole 10d, the orifice passage 10c, and the through hole 10e.

  For this reason, when the hydraulic pressure variation in the pressure receiving chamber 14 occurs due to the impact vibration between the upper mounting bracket 4 and the lower mounting bracket 6, the balance chamber 16 is allowed to change its volume due to the deformation of the diaphragm member 12. The internal liquid reciprocates between the pressure receiving chamber 14 and the equilibrium chamber 16. At this time, the liquid passes through the orifice passage 10c, so that an anti-vibration action occurs.

  Here, the configuration of the orifice member 10 is shown in FIG. 2A is a plan view, FIG. 2B is a bottom view, FIG. 2C is a front view, FIG. 2D is a perspective view, and FIG. 2E is a perspective view in an elevational state. As shown in the exploded perspective view of FIG. 3, the orifice member 10 includes a rigid orifice member main body 11 and a rubber-like elastic body wall portion 10g formed as a ring-like rubber-like elastic film.

  The orifice member body 11 is formed by bending a metal plate as shown in FIG. 4A is a plan view, FIG. 4B is a front view, FIG. 4C is a bottom view, FIG. 4D is a perspective view, FIG. 4E is a right side view, FIG. 4F is a rear view, and FIG. It is a perspective view in a state of looking up. The orifice member main body 11 is formed with a partition wall 10h that divides the pressure receiving chamber 14 and the equilibrium chamber 16 in the center, and a caulking portion 10a and a contact portion 10b are formed surrounding the partition wall 10h. The contact portion 10b and the caulking portion 10a that are adjacent to the partition wall 10h are thus formed at an angle, so that one side surface of the orifice member body 11, that is, the outer peripheral surface side here is opened. A ring-shaped passage space 10i is formed as a passage shape having a substantially triangular cross section in the state. In the ring-shaped passage space 10i, as described above, the partition wall 10f is formed between the through hole 10d of the contact portion 10b and the through hole 10e of the caulking portion 10a.

  The ring-shaped passage space 10i has a rubber-like elastic wall formed by vulcanizing and bonding a rubber-like elastic film to the contact portion 10b and the caulking portion 10a on the outer peripheral surface side in an open state. The orifice passage 10c is formed by being blocked by the portion 10g.

  As described above, the orifice member 10 formed in this way is sandwiched between the cylindrical member 6a and the bottom member 6b at the periphery of the caulking portion 10a as described above, and is configured as shown in FIG. An orifice passage 10 c is formed between the chamber 14 and the equilibrium chamber 16.

  FIG. 5A shows the state of the orifice passage 10c in a normal state in which small amplitude vibration occurs between the upper mounting bracket 4 and the lower mounting bracket 6. The cylindrical member 6a and the main rubber elastic body 8 corresponding to the orifice passage 10c have a vent hole 10j that passes through them and opens to the inner surface of the main rubber elastic body 8. Thus, the external pressure applied from the outside of the orifice passage 10c to the rubber-like elastic wall portion 10g is maintained at the atmospheric pressure.

  At the time of small amplitude vibration, since a small amount of liquid reciprocates in the orifice passage 10c, the flow rate of the liquid in the orifice passage 10c does not increase. Therefore, the pressure drop in the orifice passage 10c due to the liquid flow rate is small. That is, the differential pressure between the atmospheric pressure on the vent hole 10j side and the hydraulic pressure in the orifice passage 10c causes the rubber-like elastic body wall portion 10g to enter the orifice passage 10c against the elastic force of the rubber-like elastic body wall portion 10g. It will not be a force to deform greatly.

  However, when a large amplitude vibration different from the normal time occurs, a large amount of liquid reciprocates in the orifice passage 10c, so that the flow velocity of the liquid in the orifice passage 10c increases and the pressure drop in the orifice passage 10c is about growing. Therefore, the differential pressure between the atmospheric pressure on the vent hole 10j side and the hydraulic pressure in the orifice passage 10c is against the elastic force of the rubber-like elastic wall portion 10g as shown in FIG. This is a force that greatly deforms the portion 10g to the inside of the orifice passage 10c. This narrows the orifice passage 10c and reduces the cross-sectional area of the passage. For this reason, the resonance characteristics due to the orifice passage 10c change, and the resonance generated by the small amplitude vibration does not occur at the time of the large amplitude vibration, and the fluctuation range of the pressure in the pressure receiving chamber 14 is suppressed as compared with the case where the resonance occurs. Being smaller. As shown in FIG. 5B, the position where the rubber-like elastic body wall portion 10g protrudes into the orifice passage 10c is not limited to the whole orifice passage 10c, but also varies depending on the liquid flow direction.

According to the first embodiment described above, the following effects can be obtained.
(I). The rubber-like elastic wall portion 10g is formed in a peeled state from the inner wall of the orifice passage 10c. During normal small amplitude vibration, the flow velocity of the liquid flowing in the orifice passage 10c is low, so the pressure drop in the orifice passage 10c is small, and the rubber-like elastic body wall 10g does not protrude into the orifice passage 10c, narrowing the flow path. There is nothing. Therefore, at the normal time, vibration can be sufficiently prevented by the resonance action at the time of reciprocating liquid flow in the orifice passage 10c.

  However, as described above, at the time of large amplitude vibration, the orifice passage 10c becomes narrower than at the time of small amplitude vibration, and the resonance characteristics change so that resonance in the orifice passage 10c does not easily occur or does not occur. For this reason, since the pressure vibration width is suppressed in the pressure receiving chamber 14 and is not greatly changed to the low pressure side, the occurrence of cavitation can be suppressed. Even during this large amplitude vibration, there is a vibration isolation effect due to the flow resistance by the orifice passage 10c.

  Therefore, the engine mount 2 of the present embodiment uses the rubber-like elastic body wall portion 10g described above to suppress the occurrence of cavitation, so that the device is not complicated and the vibration-proofing effect is sufficiently produced. Can be made.

  (B). Even if the vent hole 10j is not provided, the rubber-like elastic body wall portion 10g can be protruded to some extent by the liquid flowing at high speed in the orifice passage 10c. However, in particular, by opening the vent hole 10j in the inner wall of the orifice passage 10c, it is possible to apply a stable pressure as an external pressure to the rubber-like elastic body wall portion 10g, and the orifice passage in the rubber-like elastic body wall portion 10g. The lift from the inner wall of 10c can be made reliable and stable.

  (C). The orifice member 10 is formed by joining the caulking portion 10a and the contact portion 10b by vulcanization adhesion or the like so as to cover the ring-shaped passage space 10i of the orifice member body 11 with a rubber-like elastic film. ing. The orifice member 10 is assembled into the engine mount 2 by caulking between the cylindrical member 6a and the bottom member 6b. Thus, the rubber-like elastic body wall portion 10g in a peeled state from the inner wall of the orifice passage 10c can be easily formed.

[Embodiment 2]
As shown in FIG. 6, the orifice member 110 in the engine mount 102 of the present embodiment is such that the upper and lower edges of the rubber-like elastic film are more inside the ring passage space 110i of the orifice member body 111 than in the first embodiment. And joined to the contact part 110b and the caulking part 110a. Thus, the rubber-like elastic film forms a rubber-like elastic body wall portion 110g. Other configurations are the same as those of the first embodiment.

  With this configuration, the orifice passage 110c is hardly narrowed as shown in FIG. However, at the time of large amplitude vibration, as shown in (B), the rubber-like elastic body wall portion 110g protrudes into the orifice passage 110c due to the differential pressure as described in the first embodiment, so that the orifice passage 110c is narrowed.

The configuration of the second embodiment described above can produce the same effects as those of the first embodiment.
[Embodiment 3]
As shown in FIG. 7, in the orifice member 210 in the engine mount 202 of the present embodiment, the rubber-like elastic film is not joined to the caulking portion 210a and the contact portion 210b. The upper end edge side of the rubber-like elastic film is clamped between the contact portion 210b and the main rubber elastic body 208, and the lower end edge side is between the caulking portion 210a and the main rubber elastic body 208 or the cylindrical member 206a. It is pinched by caulking.

  As a result, a rubber-like elastic body wall portion 210g is formed between the contact portion 210b and the caulking portion 210a as shown in FIG. Other configurations are the same as those of the first embodiment.

  With this configuration, the orifice passage 210c is hardly narrowed as shown in FIG. However, at the time of large amplitude vibration, as shown in (B), the rubber-like elastic body wall portion 210g protrudes into the orifice passage 210c due to the differential pressure as described in the first embodiment, so that the orifice passage 210c is narrowed.

The configuration of the third embodiment described above can produce the same effects as those of the first embodiment.
[Embodiment 4]
As shown in FIG. 8, the orifice member 310 in the engine mount 302 of the present embodiment is not provided with a dedicated rubber-like elastic film. Instead, the lower end portion 308a of the main rubber elastic body 308 where the contact portion 310b and the caulking portion 310a are in close contact is formed in a peeled state from the cylindrical member 306a. Therefore, the combination of the lower end 308 a of the main rubber elastic body 308 and the orifice member main body 311 constitutes the orifice member 310. Other configurations are the same as those of the first embodiment.

  Since the peeled lower end portion 308a of the main rubber elastic body 308 is formed thin, it functions in the same manner as the rubber elastic wall portion of the first to third embodiments. That is, the orifice passage 310c is hardly narrowed as shown in FIG. 8A during small amplitude vibration, but the main rubber elastic corresponding to the rubber-like elastic wall as shown in FIG. 8B during large amplitude vibration. The lower end portion 308a of the body 308 projects into the orifice passage 310c, thereby narrowing the orifice passage 310c.

  The configuration of the fourth embodiment described above can produce the same effects as those of the first embodiment. Since a rubber-like elastic body wall can be formed without attaching a separate rubber-like elastic film, a simple configuration can be achieved.

[Other embodiments]
(A). In each of the above-described embodiments, an example in which a vent hole is provided on the cylindrical member side of the lower mounting bracket has been shown. You may make it flow out temporarily to the outer side (inside of a cylindrical member or a main body rubber-like elastic body) rather than an elastic body wall part. In this case, since the liquid outside the rubber-like elastic wall hardly flows, a pressure difference is generated between the liquid flowing in the orifice passage and the rubber-like elastic wall is moved into the orifice passage during large amplitude vibration. Can be projected inward.

  (B). In the first embodiment, the rubber-like elastic body wall has the rubber-like elastic body film joined to the orifice member main body side. Instead, the upper end edge and the lower end edge of the rubber-like elastic body film are connected to the main rubber-like body. You may join to the elastic body side or the cylindrical member side. With this configuration, when the orifice member main body is fixed to the lower mounting bracket by caulking, the caulking portion and the abutting portion can be integrated as an orifice member by contacting the rubber-like elastic film. it can.

FIG. 3 is a longitudinal sectional view of the automobile engine mount according to the first embodiment. FIG. 3 is a configuration explanatory diagram of an orifice member according to the first embodiment. The disassembled perspective view of an orifice member. The structure explanatory drawing of the orifice member main body which is a rigid body part of an orifice member similarly. FIG. 3 is a longitudinal sectional view showing a function of a rubber-like elastic body wall portion according to the first embodiment. The longitudinal cross-sectional view which shows the function of the rubber-like elastic body wall part of Embodiment 2. FIG. FIG. 6 is a longitudinal sectional view showing the function of a rubber-like elastic body wall portion according to a third embodiment. The longitudinal cross-sectional view which shows the function by the lower end part of the main body rubber-like elastic body of Embodiment 4. FIG.

Explanation of symbols

  2 ... Engine mount, 4 ... Upper mounting bracket, 4a ... Bolt, 4b ... Pin, 6 ... Lower mounting bracket, 6a ... Cylindrical member, 6b ... Bottom member, 6c ... Mounting bolt, 6d ... Through hole, 8 ... Rubber body Elastic body, 10 ... orifice member, 10a ... caulking part, 10b ... contact part, 10c ... orifice passage, 10d, 10e ... through hole, 10f ... partition wall, 10g ... rubber-like elastic body wall part, 10h ... partition wall, 10i: Ring-shaped passage space, 10j: Vent, 11 ... Orifice member main body, 12 ... Diaphragm member, 14 ... Pressure receiving chamber, 16 ... Equilibrium chamber, 102 ... Engine mount, 110 ... Orifice member, 110a ... Covered portion, 110b ... abutting portion, 110c ... orifice passage, 110g ... rubber-like elastic body wall portion, 110i ... ring passage space, 111 ... orifice member body, 202 ... en 206a ... cylindrical member, 208 ... body rubber elastic body, 210 ... orifice member, 210a ... caulking part, 210b ... contact part, 210c ... orifice passage, 210g ... rubber elastic wall part, 302 ... engine Mount, 306a ... cylindrical member, 308 ... main rubber elastic body, 308a ... lower end, 310 ... orifice member, 310a ... caulking part, 310b ... contact part, 310c ... orifice passage, 311 ... orifice member body.

Claims (6)

The main rubber elastic body forms a part of the wall and the liquid is sealed inside, so that the vibration generated between the two attachment members connected by the main rubber elastic body Since the pressure receiving chamber in which the fluid pressure fluctuates and the liquid is sealed inside and the flexible film forms a part of the wall, the volume change is allowed based on the deformation of the flexible film. A liquid-filled vibration isolator including an equilibrium chamber, and an orifice passage communicating the pressure receiving chamber and the equilibrium chamber with each other,
The inner wall of the orifice passage is formed with a rubber-like elastic body wall portion that protrudes into the orifice passage and narrows the passage in response to a pressure drop in the orifice passage caused by a liquid flow rate. Liquid-filled vibration isolator. 2. The rubber-like elastic body wall portion according to claim 1, wherein the rubber-like elastic body wall portion is formed as a rubber-like elastic body film in a peeled state from the inner wall of the orifice passage, and the rubber-like elastic body film is lifted from the inner wall of the orifice passage. A liquid-filled vibration isolator that narrows the flow path of the orifice passage. 3. The method according to claim 2, wherein an atmospheric pressure is introduced as an external pressure of the rubber-like elastic membrane by opening a vent hole in the inner wall of the orifice passage where the rubber-like elastic membrane is disposed. A liquid-sealed anti-vibration device. 4. The orifice passage according to claim 1, wherein the orifice passage uses a rigid orifice member body having a passage space in which one side surface is in an open state, and the one side surface side of the passage space is rubbery. A liquid-filled vibration damping device, wherein the rubber-like elastic body wall is formed by covering with an elastic film. 5. The orifice member body according to claim 4, wherein the one side surface side abuts against an inner surface of the mounting member that forms the pressure receiving chamber and the equilibrium chamber therein, and the one side surface side and the mounting member A liquid-filled vibration damping device, wherein the rubber-like elastic film is sandwiched between the inner surface and the one side of the passage space is covered with the rubber-like elastic film. 6. The liquid-filled vibration damping device according to claim 4, wherein the rubber-like elastic film is joined to the one side surface of the passage space at the orifice member body.

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