JPH025937B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a fluid-filled bushing assembly that achieves a vibration damping effect based on the elastic deformation of a rubber elastic body and the flow resistance of a fluid. This invention relates to a bush-type fluid-filled vibration damping support that can be changed according to its characteristics.

(Prior Art) A vibration isolation assembly, which is a type of vibration isolation support used in the suspension of vehicles such as automobiles, is attached to a predetermined mounting shaft and is designed to mainly attenuate or block vibrations in the axial direction. There is. for example,
This is the vibration-proof support used in automobile body mounts, cab mounts, member mounts, strut bar cushions, and the like. In recent years, a fluid-filled bushing has been developed as one such vibration-proofing support that combines both a vibration-insulating effect based on the elastic deformation of rubber and a vibration-damping effect based on the flow resistance of the fluid. 48
-36151 Publication and Special Publication No. 52-16554, etc.
A cylindrical rubber elastic body is interposed between the inner cylinder member and the outer cylinder member, and the rubber elastic body has
A first fluid chamber and a second fluid chamber each filled with a predetermined incompressible fluid are formed, and the incompressible fluid is allowed to flow between the fluid chambers. something is proposed.

(Problem) By the way, this type of bushing is generally required to exhibit a large damping effect against excitation forces that cause large displacements at low frequencies, depending on the location where it is applied. At the same time, it is required to exhibit a low dynamic spring constant for excitation forces of high frequency and small displacement. However, in the case of the conventional fluid-filled bushing as in the above example, the cross-sectional area and length of the orifice that communicates the first fluid chamber with the second fluid chamber remain unchanged. It has been difficult to simultaneously satisfy these two requirements. In other words, if the orifice is selected so that the damping force peaks in the low frequency range, the dynamic spring constant in the high frequency range will increase,
Conversely, if the orifice is selected so that the dynamic spring constant is low in the high frequency range, the damping performance at low frequencies will be insufficient.

On the other hand, unlike the bush-type vibration-proof support that has a structure in which a cylindrical rubber elastic body is interposed between the inner cylinder member and the outer cylinder member, a predetermined mounting bracket is integrally added to the block-shaped rubber body. As a mount type fluid-filled vibration damping support with a structure fixed by sulfur molding, Japanese Patent Application Laid-Open No. 53-5376 and Japanese Patent Application Laid-open No. 57-9340
In the above publication, a pressure receiving chamber is provided within such a rubber block, and an equilibrium chamber is provided separately from the pressure receiving chamber, and both chambers are connected with an orifice to create a predetermined flow resistance. A movable plate is provided between the pressure receiving chamber and the equilibrium chamber to avoid pressure rise in the pressure receiving chamber, and by effectively utilizing the spring constant of the rubber block, it is possible to A fluid-filled mount that can simultaneously satisfy high damping characteristics and a low dynamic spring constant in the high frequency range has been revealed, but it is structurally difficult to apply such a structure to a bush type vibration isolation support. It is extremely difficult to

That is, in the bush type vibration-proof support, the cylindrical rubber elastic body is interposed between the inner cylinder member and the outer cylinder member, so that the inner and outer surfaces of the rubber elastic body are It will be physically regulated. Therefore, even if an attempt is made to adopt a structure such as the above-mentioned mount type, it is extremely difficult to adopt it due to space (structural) considerations.

(Solution Means) Here, the present invention has been made under such circumstances, and its characteristics are as follows:
A predetermined metal sleeve is integrally fixed to the outer peripheral surface by integral hot-flow molding, and a plurality of pocket portions are formed independently in correspondence with a plurality of window portions formed at predetermined positions in the circumferential direction of the metal sleeve. The provided cylindrical rubber elastic body is arranged concentrically on the outside of the inner cylinder member, and a predetermined outer cylinder member is press-fitted into the outer peripheral surface of the metal sleeve fixed to the rubber elastic body. A plurality of independent fluid chambers are formed by covering the opening of the pocket portion provided in the rubber elastic body with the outer cylinder member,
Further, in a fluid-filled bushing assembly in which a predetermined incompressible fluid is sealed in each of the plurality of fluid chambers, and the incompressible fluid is configured to mutually flow between the fluid chambers, A predetermined intersleeve is buried concentrically, while first and second communication paths are formed to extend from one of the plurality of fluid chambers to the other, respectively giving different flow resistances to the incompressible fluid. An arc-shaped orifice member is disposed in the circumferential direction on the outer periphery of the rubber elastic body, and the incompressible fluid between the fluid chambers is circulated through the first communicating path that provides a relatively large flow resistance. The fluid chambers are arranged so as to allow communication and to block communication between the fluid chambers through the second communication path that provides relatively small flow resistance, and according to pressure fluctuations in one of the fluid chambers. A movable plate that can be displaced by a predetermined distance is provided on the other fluid chamber side.

Further, the present invention can advantageously provide a bush type fluid-filled vibration isolation support that can simultaneously satisfy high damping characteristics in a low frequency range and a low dynamic spring constant in a high frequency range. It was summer.

In the present invention, it is preferable that the arc-shaped orifice member straddles between the pocket portions by cutting out the metal sleeve and forming the outer periphery of the rubber elastic body into a concave groove shape. The orifice member has a first orifice groove with a small cross-sectional area and a second orifice groove with a large cross-sectional area on the outer peripheral surface of the orifice member. are provided, and the first and second orifice grooves are covered by the press-fitted outer cylinder member, thereby forming the first and second communication passages, respectively. It happens.

Further, according to a preferred aspect of the present invention, the arc-shaped orifice member is made to protrude a predetermined length into one of the fluid chambers with which it is communicated, and the second communication member located at the protrusion portion. A structure is adopted in which the movable plate is provided in the passage portion, and furthermore, the second communication passage has a dead end structure at the end of the orifice member on the side protruding into the one fluid chamber, while the orifice member has a dead end structure. A movable plate accommodating pocket portion is provided on the inner surface side of the entry portion of the member, and the second communicating path is formed by a through hole passing through the orifice member in the thickness direction with respect to the movable plate accommodating pocket portion. The movable plate is communicated so that the pressure of the other fluid chamber transmitted through the second communication path is applied to one side surface of the movable plate housed therein, and the movable plate The pressure of the one fluid chamber is applied to the other both sides of the fluid chamber.

(Operation/Effect) Therefore, in the fluid-filled bushing assembly according to the present invention configured as described above, when an excitation force that causes a large displacement at a low frequency is applied, the two fluid chambers are arranged to connect. A movable plate provided in the communication path (second) that provides relatively small flow resistance formed by the orifice member provided in the fluid chamber is configured to move the incompressible fluid generated as the pressure in one fluid chamber increases. Displacement (movement) by a predetermined distance due to the pressing action of
However, if the flow exceeds that point, the incompressible fluid is prevented from flowing through that communication path, and as a result, it passes through another communication path, that is, the first communication path, which provides a relatively large flow resistance. Incompressible fluid flows between the two fluid chambers, thereby effectively damping vibrations that cause large displacements at low frequencies.

On the other hand, when a high-frequency, small-displacement excitation force is applied, the pressure fluctuations in the fluid chamber caused by the excitation force are applied to the fluid chamber via a communication path that provides relatively small flow resistance. The movable plate is actuated so that the movable plate can be moved a predetermined distance.
The increase in pressure in these two fluid chambers and, by extension, the increase in the dynamic spring constant of the bushing assembly (vibration isolating support) as a whole is effectively suppressed, so even if high-frequency vibrations are input,
Due to its effective low dynamic spring characteristics, the vibration can be effectively isolated.

Moreover, according to the bushing assembly structure according to the present invention, in the outer peripheral part of the rubber elastic body,
By disposing the orifice member so as to extend from one fluid chamber to the other fluid chamber in the circumferential direction, it is possible to effectively form two types of communication paths that provide different flow resistances therein,
Furthermore, it is possible to advantageously provide there a movable plate that can greatly contribute to improving the vibration isolation function in a high frequency range.

Furthermore, since the intersleeve is embedded concentrically in the rubber elastic body constituting the bushing assembly according to the present invention, it maintains low spring characteristics in the axial direction and low spring characteristics in the torsional direction. The spring characteristics in the right angle direction can be effectively improved, thereby satisfying all the requirements for improving steering stability required for a suspension bushing for a vehicle. However, in order to improve the steering stability of the vehicle, it is necessary to increase the ratio of spring constants in the direction perpendicular to the axis of the bushing and in the axial direction.

(Example) Hereinafter, an example in which the present invention is applied to a suspension bush used in a suspension system of an automobile will be described in detail based on the drawings.

First, Fig. 1 shows a cross-sectional view of the fluid-filled bushing assembly, Fig. 2 shows a longitudinal sectional view thereof, and Figs. 3 and 4 show partial longitudinal sectional views thereof. are shown respectively.

In those figures, the fluid-filled bushing assembly according to the present invention includes a thick-walled cylindrical inner cylinder fitting 2 that functions as an inner cylinder member, and a rubber sleeve that is a cylindrical rubber elastic body disposed concentrically on the outside of the inner cylinder fitting 2. 4, a cylindrical outer cylinder member 6 that is press-fitted into the outside of the rubber sleeve 4 and functions as an outer cylinder member, and an outer cylinder member that is disposed in the circumferential direction on the outer periphery of the rubber sleeve 4. and an arc-shaped orifice member 8 that comes into contact with the inner circumferential surface of the orifice member 6 .

By the way, as shown in FIGS. 5 to 7, the rubber sleeve 4 in such a fluid-filled bushing assembly is formed by integral vulcanization molding into a metal inner cylindrical fitting 2.
The rubber sleeve 4 is integrally formed into a thick-walled cylindrical shape, and at the same time, a metal sleeve 10 is integrally vulcanized and bonded to the outer peripheral surface of the rubber sleeve 4. In other words, the rubber sleeve 4 has a structure in which the inner cylinder fitting 2 and the metal sleeve 10 are integrally vulcanized and molded. Inside the rubber sleeve 4, two half-shaped (half-cylindrical) metal intersleeve segments 12 as shown in FIGS. 8 and 9 are combined into a cylindrical shape and concentrically arranged. It is buried and placed.

Further, the rubber sleeve 4 is provided with a pair of pocket portions 14, 14 having a predetermined depth symmetrically with respect to the axis, and a pair of pocket portions 14, 14 are provided in the rubber sleeve 4, and the orifice member 8 is inserted into the pocket portions 14, 14 by straddling these pocket portions 14, 14. The fitting groove 16 is formed in the outer circumference of the rubber sleeve 4 in the shape of a concave groove, while the pocket portions 14, 14
and a fitting groove 16 are both opened outward. For this reason, the metal sleeve 10 fixed to the outer peripheral surface of the rubber sleeve 4 has two symmetrical windows 18 and 18, as shown in FIGS. 10 and 11. A circumferential notch 20 of a predetermined width is provided to connect the two. Further, the half-shaped intersleeve divided body 12 concentrically embedded in the rubber sleeve 4 also has a rectangular shape having a size sufficient to allow the pocket portion 14 to fit into the portion where the pocket portion 14 is provided. A notch hole 22 is provided.

Further, the rubber sleeve 4 is formed with spaces 24, 24 extending in the axial direction between the circumferential ends of the pair of half-shaped intersleeve segments 12, 12 embedded therein. This space 24,
24 is placed approximately in the middle of the two pocket parts 14, 14, and is used to perform a squeezing operation from the metal sleeve 10 side (from the outside) on the rubber sleeve 4 formed by integral vulcanization molding. By adding this, it is possible to simultaneously apply preliminary compression to the rubber sleeve 4 portions located on the outside and inside of the intersleeve divided body 12, and the preliminary compression due to such drawing process. Compression makes it possible to improve the durability of the adhesive surface of the rubber sleeve 4. In addition, as is clear from FIGS. 5 to 7, the metal sleeve 1
Rubber seal parts 26 and 28 extending from the rubber sleeve 4 at a predetermined height are provided in a continuous shape around the periphery of the window part 18 and the notch part 20.

Also, the fitting groove 1 of the rubber sleeve 4
The orifice member 8 fitted into the hole 6 is shown in FIG.
As is clear from FIGS. 2, 4, and 12, it has an arcuate shape that is longer than the length of the fitting groove 16 by a predetermined length so that it can be inserted into one pocket portion 14 by a predetermined length. A first orifice groove 3 with a small cross-sectional area is formed on its outer peripheral surface.
0 and a second orifice groove 32 with a large cross-sectional area,
Each is formed in the circumferential direction. The second orifice groove 32 having a large cross-sectional area has a dead end structure (closed structure) at the end of the orifice member 8 on the side where it is projected into the pocket portion 14, and has a dead end structure (closed structure) at the bottom near the dead end portion. , has a through hole 34 penetrating the orifice member 8 in the thickness direction.

Further, a movable plate 36 made of rubber is arranged so as to cover and close the through hole 34 from the inside of the orifice member 8, that is, from the inner surface side, and a pocket portion for accommodating the movable plate 36 is formed. A pocket forming member 40 having a recess 38 slightly larger than the movable plate 36 is fixed to the inner surface of the orifice member 8 in correspondence with the through hole 34. A plurality of through holes 42 are provided at the bottom of the recess 38 of the pocket forming member 40 and are communicated with the inside of the pocket 14 of the rubber sleeve 4.

Furthermore, as shown in FIGS. 13 and 14, the outer cylindrical metal fitting 6 that is press-fitted onto the outer peripheral surface of the metal sleeve 10 fixed to the rubber sleeve 4 is
While the length in the axial direction is longer than the metal sleeve 10 integrally vulcanized and bonded to the orifice 8, a stepped flange portion 44 is provided at one end in the axial direction. It has a structure.

When assembling a fluid-filled bushing assembly as shown in FIG. 1 according to the present invention using each part of the structure as described above, first, the inner cylindrical fitting 2 and the metal sleeve are formed on the inner and outer peripheral surfaces by integral vulcanization molding. 10 is integrally fixed to the rubber sleeve 4, and a predetermined incompressible fluid such as water, alkylene glycol, polyalkylene glycol, silicone oil, or In a fluid such as a mixture thereof, the orifice member 8 is moved by its movable plate 36.
The end on the side where the
It is fitted and assembled so that it can be inserted a predetermined length inside.

Next, with the orifice member 8 assembled, the outer cylindrical fitting 6 is press-fitted onto the outer circumferential surface of the metal sleeve 10 fixed to the outer circumferential surface of the rubber sleeve 4, whereby the two pocket parts 14 , 14 are respectively sealed with predetermined incompressible fluids, and the openings of the pocket portions 14 are covered with the outer cylindrical fittings 6, thereby forming two independent fluid chambers 46.
Further, the outer openings of the first and second orifice grooves 30 and 32 of the orifice member 8 are similarly covered with the outer cylinder fittings 6, so that
First and second communication paths that provide different flow resistances to the incompressible fluid, in other words, the first communication path 48 that provides relatively large flow resistance and the second communication path that provides relatively small flow resistance. communication path 50
will be formed.

In this press-fitted state of the outer cylinder fitting 6, after the stepped flange portion 44 of the outer cylinder fitting 6 is caulked and fixed to the flange portion of the metal sleeve 10, the outer cylinder fitting 6 is The required drawing process is applied using the Happo drawing process,
Furthermore, by fixing the end opposite to the stepped flange 44 to the end of the metal sleeve 10 by roll caulking, the desired bushing assembly as shown in FIG. 1 is completed. be.

Therefore, in the assembled state in this manner, the two fluid chambers 46, 46 defined by the two pocket portions 14, 14 formed in the rubber sleeve 4 and the outer cylindrical fitting 6 are connected to the orifice. Part 8
The fluid chambers 46, 46 communicate with each other through a first communication path 48 formed by a first orifice groove 30 that opens at both ends of the fluid chambers 46, 46. By allowing the fluids to flow with each other, a relatively large desired flow resistance is generated. On the other hand, a second communication path 50 formed by the second orifice groove 32 of the orifice member 8 opens at one end of the orifice member 8 and communicates with one fluid chamber 46. , the other end side has a dead end structure, and the recess 3 of the pocket forming member 40 is inserted through the through groove 34 passing through the bottom thereof.
Since the movable plate 36 housed in the movable plate 8 is provided, the pressure in the one fluid chamber 46 is applied to one surface of the movable plate 6 .

That is, the other fluid chamber 4 is connected to the surface of the other side of the movable plate 36 through the through hole 42 provided at the bottom of the recess 38 of the pocket forming member 40.
6 will be applied.

In short, the movable plate 36 functions to partition the second communication path 50 and cut off communication to the other fluid chamber 46, and according to pressure fluctuations in the two fluid chambers 46, 46, the pocket It is adapted to be able to be displaced (moved) by a predetermined distance within the pocket portion formed in the recess 38 of the portion forming member 40. Note that this second communication path 50 has a relatively small flow rate in order to effectively transmit pressure fluctuations so that the movable plate 36 can be displaced in accordance with pressure fluctuations in the fluid chamber 46. It is said to be a passage (orifice structure) that provides only resistance.

Incidentally, a fluid-filled bushing assembly having such a structure can be suitably used as a suspension bushing in a suspension system of an automobile, for example. In that case, the outer cylinder fitting 6 is fitted into, for example, the boss portion of the control arm, while the vehicle body or wheel side shaft is inserted into the inner cylinder fitting 2, and the pair of fluid chambers 46 and 46 will be used in a state where they are opposed to each other in the direction in which they receive the main vibration load.

When an excitation force (vibration load) that causes a large displacement at a low frequency is applied, the rubber sleeve 4 is elastically deformed and the two fluid chambers 46, 46 are
As the volume of one side decreases and the volume of the other side increases, fluid tries to flow through the first communication path 48 and the second communication path 50. Since the plate 36 is provided and partitions the plate 36, fluid flow through the second communication passage 50 is substantially prevented;
Therefore, since the fluid flow between the fluid chambers 46, 46 is performed only through the first communication path 48, the large flow resistance caused in the first communication path 48 produces a large damping effect. It will be expressed.

On the other hand, when vibrations of high frequency and small amplitude (small displacement) are input, it becomes extremely difficult for the fluid to pass through the first communication path 48 of the orifice member 8, which has a large flow resistance. two fluid chambers 46 that can be increased or decreased by vibration input;
The fluid pressure of the incompressible fluid in 46 is applied to the flexible movable plate 3 from both sides through the second communication path 50, the through hole 34, and the through hole 42 of the pocket forming member 40.
6, by vibrating the movable plate 36 in response to such pressure, the pressure fluctuations are alleviated, and the overall dynamic spring constant is prevented from increasing. Effective isolation against high frequency vibrations can be achieved. In addition, by being able to lower the dynamic spring constant at high frequencies in this way, the degree of freedom in the rubber hardness and rubber compounding of the rubber sleeve 4 can also be increased.

In addition, in the fluid-filled bushing assembly having such a structure, the first and second communicating passages 48 and 50, which serve as orifices that provide different flow resistances to the incompressible fluid, are provided on the outer periphery of the rubber sleeve 4. The movable plate 36, which is cleverly formed by the arc-shaped orifice member 8 that is fitted and which blocks the second communication path 50, is also advantageously provided for the orifice member 8, as described above. It has now become possible to effectively realize a fluid-filled vibration damping assembly that can simultaneously satisfy high damping characteristics in the low frequency range and low dynamic spring constant in the high frequency range in a bush type. .

Furthermore, in the fluid-filled bushing assembly having the structure described above, a pair of intersleeve segments 12, 12 are combined in a cylindrical shape within the rubber sleeve 4 constituting the assembly, and are buried and arranged concentrically. Therefore, while maintaining low spring characteristics in the axial direction and low spring characteristics in the torsional direction, it is possible to effectively improve the spring characteristics in the direction perpendicular to the axis, thereby achieving the steering stability required for automobile suspension bushes. It is possible to satisfy all demands for sexual improvement.

In addition, in this embodiment, continuous rubber seal parts 26 and 28 are formed at the peripheral edges of the pocket part 14 and the fitting groove 16, which improves the effect between the outer cylindrical fitting 6 and the press-fitted outer cylindrical fitting 6. The pocket portion 14 (fluid chamber 4
6) This also advantageously prevents the incompressible fluid sealed in the container from leaking to the outside.

Next, another embodiment of the present invention is shown in FIGS. 15 to 19.
The explanation will be given based on the drawings, but the same parts as in the above embodiment will be given the same reference numerals and the explanation will be omitted.

In this embodiment, unlike the above example, the inner cylinder fitting 2 is not integrally vulcanized and bonded to the inside of the rubber sleeve 4, but the rubber sleeve 4 is integrated with the metal sleeve 10. After being vulcanized and molded, the inner cylindrical fitting 2 is press-fitted inside the rubber sleeve 4 and assembled so as to be positioned concentrically.

By press-fitting the inner cylindrical fitting 2, the rubber sleeve 4 located inside the intersleeve 52 is
The portion can be pre-compressed. Therefore, the preliminary compression by the drawing operation from the outer cylinder fitting 6 side only needs to be performed on the portion of the rubber sleeve 4 located outside the intersleeve 52, so the intersleeve 52 is 1
As shown in FIG. 9, it is an integral cylindrical body, and has a structure in which notch holes 22 corresponding to the pocket portions 14 are symmetrically formed in such a cylindrical body.

Although the embodiments of the present invention have been described in detail above, the present invention is not to be construed as being limited to such illustrative embodiments, and the present invention includes the following without departing from the spirit thereof: Various changes, modifications, improvements, etc. can be made.

For example, in the example, one fluid chamber 46
The structure is such that the movable plate 36 is held by the pocket forming member 40 and placed on the inner surface of the protruding portion of the orifice member 8 that protrudes into the pocket portion 14. , without making the second communication path 50 a dead-end structure, the movable plate 3
In addition to holding the movable plate 36 in a free state as shown in the example, it is also possible to restrain the peripheral edge of the movable plate to reduce the pressure in the fluid chamber. It is also possible to construct a structure in which it can be elastically deformed and displaced by a predetermined distance in response to fluctuations.

Further, the movable plate 36 may be made of an elastic material such as rubber, or may be made of a rigid plastic plate or metal plate; however, if the movable plate 36 is provided so as to restrain its surroundings, Needless to say, it is desirable that it be made of an elastic material such as rubber.

Further, the fluid chamber 46 formed by the pocket portion 14 provided in the rubber sleeve 4 and the outer cylinder metal fitting 6 is
In addition to the case where there are two as shown in the example, there is no problem even if there are three or more, and even if there is a communication path provided in the orifice member 8, only in the case where there are two as shown in the example. However, the number is not limited to , and it is also possible to provide three or more.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a fluid-filled bushing assembly that is an embodiment of the present invention, and is a view corresponding to the - cross section in FIG. 2, and FIGS. 2, 3, and 4 are respectively - cross section in Fig. 1,
FIG. 3 is a cross-sectional explanatory diagram showing a - cross section and a - cross section. Fig. 5 is a front view of a vulcanized product made by integrally vulcanizing and molding a rubber sleeve between the inner cylinder metal fitting and the metal sleeve used in such a fluid-filled bushing assembly, and Fig. 6 is a half of the vulcanized product. The cross-sectional right side view, FIG. 7 is an explanatory view of the - cross section in FIG.
The figure is a front view showing one of the intersleeve divided bodies embedded in the rubber sleeve, Figure 9 is an explanatory cross-sectional view of Figure 8, and Figure 10 is a vulcanization molding on the outer peripheral surface of the rubber sleeve. The front view of the metal sleeve shown in Fig. 11 is XI-XI in Fig. 10.
FIG. 12 is an exploded perspective view of the orifice member, FIG. 13 is a front view of the outer cylindrical metal fitting to be press-fitted, and FIG. 14 is a right side view thereof. Fig. 15 is a front view of a vulcanized product obtained by integrally vulcanizing a rubber sleeve with a metal sleeve used in another embodiment of the present invention, Fig. 16 is a half-sectional right side view thereof, and Fig. 17 is - in Fig. 16
FIG. 18 is a front view showing an intersleeve embedded in a rubber sleeve of such a vulcanized product, and FIG. 19 is an explanatory cross-sectional view of FIG. 18. 2: Inner cylinder metal fitting, 4: Rubber sleeve, 6: Outer cylinder metal fitting, 8: Orifice member, 10: Metal sleeve,
12: Intersleeve divided body, 14: Pocket portion, 16: Fitting groove, 18: Window portion, 20: Notch portion,
22: Notch hole, 24: Space, 26, 28: Rubber seal portion, 30: First orifice groove, 32: Second orifice groove, 34: Through hole, 36: Movable plate,
38: recess, 40: pocket forming member, 42:
Through hole, 46: Fluid chamber, 48: First communication path, 5
0: second communication path, 52: intersleeve.

Claims (1)

[Scope of Claims] 1. A predetermined metal sleeve is integrally fixed to the outer peripheral surface by integral vulcanization molding, and a plurality of windows are formed in correspondence with a plurality of window portions formed at predetermined positions in the circumferential direction of the metal sleeve. A cylindrical rubber elastic body having independently provided pocket portions is disposed concentrically on the outside of the inner cylinder member, and a predetermined outer cylinder is attached to the outer peripheral surface of the metal sleeve fixed to the rubber elastic body. By press-fitting the member and covering the opening of the pocket provided in the rubber elastic body with the outer cylindrical member, a plurality of independent fluid chambers are formed, and each of the plurality of fluid chambers is In a fluid-filled bushing assembly configured to enclose a predetermined incompressible fluid and allow the incompressible fluid to mutually flow between the fluid chambers, a predetermined intersleeve is concentrically disposed within the rubber elastic body. An arc-shaped orifice member is embedded, and extends from one of the plurality of fluid chambers to the other, forming first and second communication paths that respectively provide different flow resistances to the incompressible fluid. Disposed in the circumferential direction on the outer periphery of the rubber elastic body to allow incompressible fluid to flow between the fluid chambers through the first communication path that provides relatively large flow resistance. The second communication path is arranged to block communication between the fluid chambers through the second communication path that provides a relatively small flow resistance, and is arranged to extend a predetermined distance toward the other fluid chamber according to pressure fluctuations in one of the fluid chambers. A fluid-filled bushing assembly characterized by being provided with a movable plate that can be displaced by . 2. A fitting groove in which the arc-shaped orifice member is provided so as to straddle between the pocket portions by cutting out the metal sleeve and forming the outer periphery of the rubber elastic body into a concave groove shape. A first orifice groove with a small cross-sectional area and a second orifice groove with a large cross-sectional area are respectively provided on the outer peripheral surface of the orifice member, and the first and second orifice grooves 2. The fluid-filled bushing assembly according to claim 1, wherein said first and second communicating passages are formed by being covered by said outer cylinder member which is press-fitted. 3. The arc-shaped orifice member is caused to protrude a predetermined length into one of the fluid chambers with which it is communicated, and the movable plate is provided in the second communication path portion located at the protrusion portion. A fluid-filled bushing assembly according to claim 1 or 2. 4. At the end of the orifice member that protrudes into the one fluid chamber, the second communication path has a dead-end structure, and a movable plate housing pocket is provided on the inner surface of the protrusion portion of the orifice member. one of the movable plates accommodated therein, and the second communication path communicates with the movable plate storage pocket portion through a through hole passing through the orifice member in the thickness direction; The pressure of the other fluid chamber transmitted through the second communication path is applied to the side surface of the movable plate, and the pressure of the one fluid chamber is applied to the other surface side of the movable plate. 4. A fluid-filled bushing assembly according to claim 3, wherein the fluid-filled bushing assembly is configured to be operated. 5. The fluid-filled bushing assembly according to any one of claims 1 to 4, wherein the inner sleeve embedded in the rubber elastic body is constituted by a divided cylinder or an integral cylinder. 6. The inner sleeve embedded in the rubber elastic body is composed of a pair of substantially semi-cylindrical divided bodies, and the pair of divided bodies are arranged in a cylindrical shape within the rubber elastic body, and the pair of divided bodies are arranged in a cylindrical shape within the rubber elastic body. A fluid-filled bushing assembly according to any one of claims 1 to 4, wherein a predetermined space is formed between circumferential ends of the divided bodies.