JPS6217440A - Fluid contained vibration isolating supporting device - Google Patents

Abstract

PURPOSE:To adjust the rigidity of the spring in two stages by opening and closing an orifice which connects plural fluid chambers separately provided in an elastic member by means of the reciprocation of a shut-off member provided in a rotary shaft member. CONSTITUTION:A rubber sleeve 10 has two symmetrical pocket parts 20 in a form of cutting off the opposite positions of its outer peripheral surface and which extend in the circumferential direction and is formed in an integrated form with the outer peripheral surface of a core metal 4. And, fluid chambers 30 are partitioned by a press fitted outer cylinder metal member 16, the pocket parts 20 of the rubber sleeve 10 and the core metal 4, and connected to each other by means of connecting passages 38, 40. A shut-off rod 42 which is reciprocated by a driving device 46, is provided midway in the connecting passage 38 in the core metal member 4 and carries out opening and closing of the connecting passage 38 to adjust the rigidity of the spring in two stages.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a fluid-filled vibration damping support device, and more particularly to a fluid-filled vibration damping support device with a bushing structure that can switch spring characteristics (spring constant) depending on the running condition of a vehicle. The present invention relates to a support device.

(Prior Art) Conventionally, suspension members such as various arms, rods, and links have been attached to the body of an automobile or the like to be able to swing in various directions in order to suspend differential gears, wheels, etc. Suspension bushings are generally incorporated into the pivot joints at both ends of the suspension member for the purpose of dampening vibrations, etc., and the bushings for the same purpose are interposed between the engine and the vehicle body. Engine mounts are also used to suppress the transmission of vibrations.

Incidentally, such suspension bushings, bushings that serve as vibration-proof supports for engine mounts, etc., generally consist of an inner cylindrical metal fitting into which a predetermined pivot shaft is fitted for vehicle suspension, etc., and an outer cylinder disposed concentrically with the inner cylindrical metal fitting. It has a structure in which a generally annular or generally cylindrical rubber sleeve is interposed between the metal fitting and vibrations are damped by deforming the rubber sleeve. Therefore, a composite bushing, a so-called fluid-filled bushing, is proposed, in which the rubber material forming the rubber sleeve does not have to have a particularly high damping coefficient, and is capable of generating a desirable damping function as a buffering function of the bushing. reached.

Namely, Japanese Patent Publication No. 48-36151, Japanese Patent Publication No. 52
As disclosed in Japanese Patent Application Laid-open No. 16554, Japanese Patent Application Laid-open No. 164242/1983, such composite bushings are
Multiple recesses (pockets) on the surface of the rubber sleeve interposed between the inner and outer metal fittings arranged concentrically.
and has a structure in which an independent fluid chamber formed by covering the opening of the recess with the inner surface of the outer cylinder fitting is filled with a predetermined fluid, and the fluid chambers are communicated through an orifice, During excitation vibration, the resistance generated when the fluid filled in one fluid chamber flows into the other fluid chamber through the orifice provides a good damping effect.

(Problem to be solved) By the way, all of the conventional bush-structured vibration isolating support devices have been designed to soften the spring stiffness (spring constant) to enhance the vibration isolation or damping effect during excitation vibration. However, in vehicles such as automobiles, there are cases in which it is required to increase the spring stiffness of such bushings depending on the driving conditions, quite contrary to the above case. For example, with the Panhard rod bushings of a 5-link coil rear suspension, when driving on rough roads, the spring stiffness of the bushings may be softened to reduce the roll stiffness of the vehicle and improve ride comfort. On the other hand, during normal driving or high-speed driving, it is required to increase the roll stiffness of the vehicle by increasing the spring stiffness of the bushing in order to improve steering stability.

However, conventional bushings have not been able to satisfy both the contradictory spring properties of soft and stiff required by the above-mentioned running conditions. This is because the spring characteristics of spring, softness, and stiffness are mutually exclusive for bushes, and conventional bushes have been studied to have soft spring stiffness solely for the purpose of improving riding comfort. This is because it is coming.

(Solution Means) Here, the present invention has been made to solve this problem, and its feature is that a pivot member and an outer cylindrical member disposed outside the pivot member at a predetermined distance. A plurality of independent fluid chambers are formed by interposing a substantially cylindrical elastic member therebetween and covering the openings of a plurality of pocket portions separately provided in the elastic member with the outer cylindrical member; In addition, a predetermined incompressible fluid is sealed in the fluid chambers, and the plurality of fluid chambers are communicated with each other via an orifice, so that the incompressible fluid flows from one fluid chamber to the other fluid chamber through the orifice. A vibration isolating support device that exhibits a desired damping effect using resistance generated during circulation, the vibration isolating support device having a fitting hole in the pivot member and in the axial direction thereof. and the orifice is substantially constituted by a communication passage communicating from the fluid chamber to the fitting hole, and a blocking member is provided that is fluid-tightly fitted in the fitting hole and reciprocated. Further, a driving means for reciprocating the blocking member is provided, and at least one of the communicating passages communicated with the fitting hole is closed or interrupted by the reciprocating operation of the blocking member by the driving means, This makes it possible to prevent fluid from flowing between the fluid chambers.

In the present invention, generally, the communication path that communicates the fluid chamber with the fitting hole includes a radial hole extending from the outer circumferential surface of the pivot member toward the fitting hole, and A radial hole is adapted to communicate with the fluid chamber. Further, a ring-shaped abutment member having a protrusion of a predetermined height that protrudes into the fluid chamber is fitted and disposed on the outer circumferential surface of the pivot member, and passes through the protrusion of the abutment member in the radial direction. The communicating path is formed so that the protrusion of the abutting member comes into contact with the inner surface of the outer cylindrical metal fitting during heavy loads, thereby functioning as a stopper means. It is designed to demonstrate.

Further, according to a preferred embodiment of the present invention, the elastic member is integrally vulcanized and bonded to the outer circumferential surface of the pivot member, and the pivot member is more axial than the elastic member at both ends thereof. It has a structure that extends a predetermined length outward in the direction, and is attached to one of two members whose extended portion is to be blocked from transmitting vibrations.

Then, the outer cylindrical member is press-fitted into the outer circumferential surface of the elastic member, thereby forming each of the plurality of fluid chambers.

Further, in the present invention, it is preferable that the distal end of the blocking member is a conical convex part, and a sealing rubber layer of a predetermined thickness is provided on the surface of the conical convex part, while the pivot member The closed end of the fitting hole is formed into a conical concave portion corresponding to the conical convex portion of the blocking member, and the communicating path is opened in the four conical portions, so that the blocking member is moved. The conical convex portion is pressed against the conical concave portion,
A structure will be adopted in which such a communication path is closed or interrupted.

(Function/Effect) As described above, in the fluid-filled vibration isolating support device according to the present invention, a plurality of independent fluid chambers constituted by a plurality of pockets within the elastic member are provided inside the elastic member. The fluid chambers are communicated with each other by the communication passages as orifices provided in the disposed pivot members, and by allowing the fluid to flow between the fluid chambers through the communication passages, a predetermined large Not only can a damping effect be produced, but also the overall spring stiffness can be kept soft.

Furthermore, since the communication path as an orifice provided in such a pivot member can be closed or shut off by reciprocating movement of a blocking member disposed within the pivot member, such a communication path can be closed or interrupted. Under the blocking state by the blocking member, even if the elastic member is deformed by inputting a predetermined load, the incompressible fluid is prevented from flowing from one fluid chamber to the other fluid chamber. As a result, deformation of the elastic member is effectively suppressed, and the spring rigidity of the entire vibration isolating support device becomes stiff.

Therefore, by driving and controlling the drive means (actuator) that reciprocates the blocking member that blocks the communication path provided in the pivot member by an external control device, the spring stiffness as a vibration-proof support device can be adjusted to two levels. This makes it possible to switch between the two spring stiffnesses, and to exhibit such two spring stiffnesses at any time.

That is, by reciprocating the shutoff member by the driving means to communicate or shut off the fluid chambers through the communication path, the contradictory spring characteristics of soft and stiff required depending on the running condition of the vehicle can be satisfied. This makes it possible to realize a vibration-proof support device that is capable of supporting vibrations.

(Examples) Hereinafter, in order to clarify the present invention more specifically, examples of the present invention will be described in detail based on the drawings.

First of all, Figures 1 to 3 show a 5-link coil type rear
An example of the application of the present invention to a banal rod bushing for a suspension is shown, in which FIGS. 1 and 2 show the overall structure of such a banal rod bushing, FIG. 3 also shows an assembly consisting of an actuator as a driving means constituting such a bush and a shutoff rod as a shutoff member reciprocated by the actuator.

In those figures, especially in figures 1 and 2,
Reference numeral 2 designates a panhard rod bushing that is an embodiment of the present invention, and a large diameter solid rod-shaped core metal fitting 4 serving as a pivot member is positioned at the center of the panhard rod bushing. In addition, a pair of brackets 6.6 fixed to the vehicle body side are attached to both ends of this core metal fitting 4 with bolts 7.7.
Such a core metal fitting 4 is supported.

A ring-shaped metal stopper member 8 having a symmetrical convex portion is press-fitted into the center of the outer circumferential surface of the core metal fitting 4, and a ring-shaped metal stopper member 8 having a symmetrical convex portion is press-fitted into the outer circumference of the core metal fitting 4. A rubber sleeve (elastic member 10) and a metal sleeve 12 with a window are provided concentrically and adjacent to each other,
Furthermore, an outer cylindrical fitting 16 having a rubber layer 14 of a predetermined thickness on the inner surface is provided on the outside thereof, and the rubber sleeve 10, metal sleeve 12, and outer cylindrical fitting 16 are integrally formed with the core metal fitting 4. It has a structure. In addition, on the outer peripheral surface of the outer cylinder fitting 16 of the Panhard rod bushing 2,
By press-fitting the end of the Panhard rod, the cylindrical portion 18, through the Panhard rod bushing 2,
The Banal rod is connected to the vehicle body side.

More specifically, the rubber sleeve 10 as an elastic member has a generally annular or cylindrical shape as a whole, and has a symmetrical shape extending in the circumferential direction with a notch at a corresponding position on the outer peripheral surface. two pockets 20.20
A relatively thin metal sleeve 12 having a window 22 corresponding to the opening of the pocket 20 is fixed to the outer peripheral surface of the rubber sleeve 10. Note that the rubber sleeve 10 is generally formed integrally with the outer peripheral surface of the core metal fitting 4 by an integral vulcanization molding method, and at this time, the metal sleeve 12 is also vulcanized and bonded at the same time.

Further, the stopper member 8 that is press-fitted and fixed onto the outer circumferential surface of the core metal fitting 4 has an oval cross-sectional shape with a circular hole, and its thick portion (protruding portion) 24 serves as a stopper portion. ing. That is, the core metal fitting 4 is press-fitted into the circular hole of this stopper member 8 and fixed, while the thick part 24 of the stopper member 8 is located in the pocket part 20 of the rubber sleeve 10, and the outer cylindrical metal fitting is 16, and forms a protrusion having a predetermined height within the pocket portion 20.

Furthermore, rubber N28 having a predetermined thickness is formed over the entire surface of the arcuate outer circumferential surface of the thick portion 24 of the stopper member 8, that is, the surface facing the inner surface of the outer cylindrical fitting 16. Further, a continuous space is made to exist around the thick portion 24 of the stopper member 8 located within the two blurred portions 20, 20.

On the other hand, a rubber layer 14 of a predetermined thickness made of rubber as an elastic material is formed over substantially the entire inner surface of the outer cylindrical metal fitting 16 which is press-fitted into the outer peripheral surface of the rubber sleeve 10. Then, a pre-compressed rubber sleeve 10 is press-fitted into the outer cylindrical fitting 16 having such a rubber layer 14 on the inner surface, and the inner wall of the press-fitted outer cylindrical fitting 16 and the rubber sleeve 10 are press-fitted in advance. pocket part 20
Separate and independent fluid chambers 30 and 30 are respectively defined by the outer peripheral surface of the core fitting 4, and each of the fluid chambers 30 thus formed contains a predetermined incompressible fluid, for example. water, alkylene glycol,
Polyalkylene glycol, silicone oil, low molecular weight polymers, or mixtures thereof are encapsulated.

The rubber layer 14 on the inner surface of the outer cylindrical fitting 16 is located between the metal sleeve 12 and the outer cylindrical fitting 16, which are fixed by vulcanization adhesive or the like so as to cover the outer peripheral surface of the rubber sleeve 10. The fluid chamber 30 is made fluid-tight, thereby effectively preventing the predetermined fluid sealed in the fluid chamber 30 from leaking. Further, both ends of the press-fitted outer cylindrical metal fitting are fixed to the metal sleeve 12 on the outer peripheral surface of the rubber sleeve 10 by crimping such as roll crimping.

Further, the core fitting 4 is provided with a large diameter hole 32 as a mounting hole extending from one end toward the other end, and a small diameter hole 34 as a fitting hole following the large diameter hole 32. The tip of the metal fitting 4 is formed into a conical recess 36.
It has a dead-end structure approximately at the center of the area. A communication passage 38 opening in the recess 36 portion of the small diameter hole 34 is provided to penetrate the inside of the core metal fitting 4 in the radial direction from the outer circumferential surface located at the respective fluid chamber 30 portion, and further such a communication passage 38 openings on the outer circumferential surface of the core metal fittings 4 are radial communication holes 40 provided in the thick wall portion 24 of the stopper member 8
The two fluid chambers 30, 30 are connected to the respective fluid chambers 30 through the communication hole 40, the communication path 38,
They are structured to communicate with each other via a small diameter hole 34, a communication path 38, and a communication hole 40. In other words, the orifice that communicates between the fluid chambers 30 and 30 is constituted by the communication holes 40, 40 and the communication passages 38, 38 extending from the respective fluid chambers to the small diameter hole 34.

On the other hand, a shutoff rod 42 is fluid-tightly fitted into the small diameter hole 34 provided in the core metal fitting 4, and can be reciprocated in the axial direction.
Furthermore, the tip of the blocking rod 42 is formed into a conical convex portion 44 corresponding to the conical concave portion 36 of the small diameter hole 34. This cutoff rod 42 is reciprocated by a drive device (actuator) 46 fitted into the large diameter hole 32 of the metal core 4.

The structure of the assembly consisting of the cutoff rod 42 and the drive device 46 is shown in an enlarged scale in FIG. That is, the cutoff rod 42 has a sealing rubber layer 48 of a predetermined thickness on the surface of the conical recess 44 at its tip, and when the cutoff port/nod 42 is advanced, it is pressed against the conical recess 36 of the small diameter hole 34. When the opening of each communication path 38 constituting the orifice is closed, the communication can be cut off. Additionally, a rubber O-IJ song 0 is attached to the circumferential surface of the intermediate portion of the cutoff rod 42.
are fitted to form a seal between the shutoff rod 42 and the inner surface of the small diameter bore 34 so that the shutoff rod 42 can move in a fluid-tight manner. Further, the drive device 46 includes a motor 52, a speed reducer 54, a mounting member 56, and a stopper 60 fixed to the mounting member 56 via a guide 58, and the drive screw 62 of the drive device 46 is connected to the cutoff rod. It is screwed into the screw hole at the base of 42. Further, a guide 58 is provided at the base of the blocking rod 42.
A flange 64 is provided which is guided by.

Therefore, the drive screw 62 at the tip of the drive device 46 is connected to the reducer 5.
4, the drive screw 62 is screwed into and out of the screw hole at the base of the cutoff rod 42, and the flange 64 is guided by the guide 58, so that the cutoff rod 42 is rotated. , and is forced to reciprocate in its axial direction.

Note that the drive device 46 is configured such that the tip of a set screw (not shown) screwed through the core fitting 4 is engaged with a drilled hole 66 provided in the mounting member 56.
The core metal fitting 4 is prevented from rotating within the large diameter hole 32 and is fixed within the large diameter hole 32.

Incidentally, the motor 52 of the drive device 46 that reciprocates the cutoff rod 42 is operated according to input from the outside. That is, as shown in FIG. 1, an output signal from a detector 68 such as a tachometer or speedometer that detects the running condition of the vehicle is used in a discrimination circuit 70 to determine whether the vehicle is running on a rough road or not. It is determined whether the vehicle is traveling on a highway or not, and the motor 52 is driven to rotate in accordance with the signal output accordingly.

Further, FIG. 4 shows an example of a more detailed external drive control structure of the drive device 46.

There, detection signals such as the transmission gear position, vehicle speed, and rotational speed (engine) detected by the detector 68 are sent to the control device 7.
The converted signal is input to the signal conversion circuit 74 of No. 2, and the converted signal is input to the judgment circuit 76 to judge the running state of the vehicle. The necessary driving power is output to the drive device 46. Therefore,
The drive device 46 is rotated by the supply of drive power from the control device 72, and the cutoff rod 4 connected thereto.
2 to reciprocate in its axial direction.

In addition, when manufacturing such a panhard rod bushing 2, first, a predetermined stopper member 8 is attached to the core metal fitting 4.
The window part 22 is press-fitted and fixed in place.
The core fitting 4 and the sleeve 1 are set concentrically in a predetermined mold, and a rubber material is injected into the gap between them and vulcanized.
At the same time, the rubber sleeve 10.28 is vulcanized and molded at the same time. At this time, the communication hole 4 of the stopper member 8
A pocket portion 20 is formed around the stopper portion 24) of the stopper member 8, and a plurality of pocket portions 20 are opened on the outer peripheral surface of the rubber sleeve 10. It is said that the structure is such that

Next, for the vulcanized product thus formed, a third hole is inserted into the large diameter hole 32 and the small diameter hole 34 of the core fitting 4.
While inserting and fixing the assembly of the shutoff rod 42 and drive device 46 as shown in the figure, a diameter reduction operation is applied to the front and rear of the assembly via the metal sleeve 12 as necessary, and then a predetermined incompressible fluid is applied. After press-fitting the outer cylindrical metal fitting 6 into the outer peripheral surface of the rubber sleeve 10 in a tank containing the rubber sleeve 10, the outer cylindrical metal fitting 16 is subjected to a diameter reduction process such as a helical drawing process,
Furthermore, by roll caulking both ends of the outer cylindrical metal fitting, the desired banal rod fish 2 is completed. Note that the incompressible fluid is contained in the outer cylinder fitting 16.
At the same time as the press-fitting operation, the rubber sleeve 1 is
Fluid chamber 3 formed by covering pocket portion 20 of 0
The seal between the rubber sleeve 10 and the outer cylinder fitting 16 is the same as that of the outer cylinder fitting 1.
The rubber layer 14 provided on the inner surface of 6 makes this operation more effective.

Therefore, in the Panhard rod bushing 2 having such a structure, the two fluid chambers 30.30 formed in the rubber sleeve 10 are connected to the communication passages 38.38 as orifices passing through the core fitting 4 in the radial direction. The communication passages 38 and 38 can be closed/blocked or opened/communicated by the cutoff rod 42 which is moved forward and backward (reciprocating) by the drive device 46. It will become. That is, the cutoff rod 42 is retracted by the drive device 46, and the communication passage 38, 38 is opened.
are connected and the two fluid chambers 30, 30 are in communication, when a force is applied to the bushing 2 in the direction perpendicular to the axis, fluid can move between the fluid chambers, thereby creating a soft spring stiffness. and communication path 38
A large damping effect will be exerted due to the flow resistance of the fluid flowing through.

On the other hand, the shutoff rod 42 is advanced by the drive device 46, and the opening of the communication path 38. When the two fluid chambers 30 and 30 are in a state where communication is cut off, even if a load is applied to the bushing 2 in the direction perpendicular to the axis, movement of fluid between the fluid chambers is not allowed, and the following occurs. As a result, the bush 2 as a whole exhibits high spring rigidity.

Therefore, as described above, the running state of the vehicle is inputted from the external detector 68, determined by the control device 72, and a predetermined driving power is supplied to the motor 52 of the drive device 46 according to the running state. , by activating it, the spring stiffness of the bushing 2 can be changed to ``soft'' or ``soft''.
This makes it possible to exhibit the contradictory performance of ``rigidity''.

For example, when driving on a rough road, two fluid chambers 30.3
By maintaining communication between 0 and 0, the spring stiffness of the bushing 2 can be softened, the roll stiffness of the car can be lowered, and the ride comfort can be improved. By closing the communication passage 38 with the blocking rod 42 and preventing the flow of fluid between the two fluid chambers 30 and 30, the spring rigidity of the bushing 2 is made stiffer.
This makes it possible to increase the roll stiffness of the vehicle and improve handling stability.

Incidentally, the communication passage 38 is opened and closed using the Panhard rod push 2 having the structure as illustrated, and its static spring constant (K
) and dynamic spring constant (K-) under various frequencies and amplitudes
The measurement results for the drive device 46 are shown in the table below.
Due to the reciprocating movement of the cutoff loft 42, the communication rod 3
It is understood that by opening and closing the opening 8, the spring stiffness (spring constant) of the bushing 2 can be significantly changed.

In addition, in the bushing 2 having the upper structure, there are stopper portions (24) of a predetermined height each constituted by a protruding portion of the stopper member 8 in the two pocket portions 20.20. Therefore, even if the outer cylinder fitting 16 is subjected to a large load in a communicating state in which the communication passage 38 is not closed by the blocking rod 42, the rubber sleeve 10 will undergo a predetermined deformation and then undergo an even larger deformation. It is designed so that it will not be affected. This is because the stopper portion (24) of the stopper member 8 is brought into contact with the outer cylindrical fitting 16 to prevent further deformation of the rubber sleeve 10.

Therefore, in such a structure, the rubber sleeve 10 is not subjected to large deformation, so its durability is further improved.
Advantageously, leakage of fluid from the fluid chamber 30, 30 due to large deformations of the fluid chamber 30, 30 can also be effectively prevented.

In the above embodiment, the metal sleeve 12 is provided on the outer circumferential surface of the rubber sleeve 10 so that the diameter of the outer shape can be effectively reduced, and the metal sleeve 12 is fitted into the outer cylindrical fitting 16 (press-fitted). ), but the present invention is not limited to this in any way (a bush structure without the outer sleeve 12 can also be adopted).

In addition, although the presence of the stopper member 8 as an abutment member located within the fluid chamber 30 as in the illustrated specific example is preferable as described above, it is not essential in the present invention. The present invention can be implemented even in a structure in which such a stopper member 8 does not exist, and furthermore, even in a structure in which a stopper member 8 is not present, the present invention can be implemented in each communication path 38 extending from each fluid chamber 30 to a small diameter hole 34 through which a blocking rod 42 is caused to reciprocate. , not only is it constituted by a single through hole passing through the core metal fitting 4 in the diametrical direction, but also the communication passages 38 extending from each fluid chamber 30 are provided shifted in the axial direction of the core metal fitting 4. Well, furthermore, such a communication path 38
There is no problem even if it is provided in an inclined state with respect to the axis of the core metal fitting 4.

According to the arrangement of the communication passages 38, the shape of the small-diameter hole 34 as a fitting hole provided in the core metal fitting 4, and furthermore, the communication between the fluid chambers through the communication passages 38 extending from each fluid chamber 30 is allowed. The form of the cutoff rod 42 that cuts off is also selected appropriately.

Further, in the specific example illustrated, a sealing rubber layer 48 is provided on the surface of the conical convex portion 44 at the tip of the blocking rod 42, so that the opening of the communication passage 38 can be effectively sealed and closed. However, such a sealing rubber layer 48
The objects of the present invention can be achieved even without this, and by changing the shape of the blocking rod 42 as described above, other suitable sealing means or even shielding means can be used. .

Furthermore, the present invention is suitably applied to the banal rod bushing of the five-link coil type rear suspension as exemplified above, but it can also be applied to other suspension bushings, as well as tension rod bushings, engine mounts, etc. The present invention can also be suitably applied to a vehicle anti-vibration support device.

In addition, various changes and modifications can be made to the present invention based on the knowledge of those skilled in the art without departing from the spirit thereof.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a Panhard rod and bushing according to an embodiment of the present invention, and FIG. 2 is a vertical sectional view of the
■It is a cross-sectional view, and Figure 3 shows the drive device used for such a bushing and the shutoff port that is reciprocated by it.
FIG. 4 is a partially cutaway front view for explaining the assembly with the bushing, and FIG. 4 is a system diagram showing an example of an external control device for controlling such a bushing drive device. 2: Banalrod Butshu

Claims (5)

[Claims] (1) A substantially cylindrical elastic member is interposed between the pivot member and an outer cylindrical member disposed at a predetermined distance on the outside thereof, and a plurality of pocket openings provided separately in the elastic member are provided. By covering with the outer cylindrical member, a plurality of independent fluid chambers are formed, and a predetermined incompressible fluid is sealed in the fluid chambers, while the plurality of fluid chambers are communicated with each other via an orifice. The vibration isolating support device is configured to exert a desired damping effect by the resistance generated when the incompressible fluid flows from one fluid chamber to the other fluid chamber through the orifice, A predetermined fitting hole is formed in the member and in the axial direction thereof, and the orifice is substantially constituted by a communication passage communicating from the fluid chamber to the fitting hole, respectively; A blocking member that is fluid-tightly fitted and reciprocated is provided, and further provided is a driving means for reciprocating the blocking member, and the reciprocating operation of the blocking member by the driving means causes communication with the fitting hole. 1. A fluid-filled vibration damping support device, characterized in that at least one of the communicating passages is blocked or blocked to prevent fluid from flowing between the fluid chambers. (2) A communication path that communicates the fluid chamber with the fitting hole includes a radial hole extending from the outer peripheral surface of the pivot member toward the fitting hole, and the radial hole is connected to the fluid chamber. A fluid-filled vibration damping support device according to claim 1, which is communicated with each other. (3) A ring-shaped abutment member having a protrusion of a predetermined height that protrudes into the fluid chamber is fitted and arranged on the outer circumferential surface of the pivot member, and the protrusion of the abutment member has a diameter. The fluid-filled vibration damping support device according to claim 1 or 2, wherein the communication passage is formed so as to penetrate in the direction. (4) The elastic member is integrally vulcanized and bonded to the outer peripheral surface of the pivot member, and the pivot member
The fluid-filled vibration isolating support device according to any one of claims 1 to 3, wherein the fluid-filled vibration isolating support device is extended axially outward by a predetermined length beyond the elastic member at both ends thereof. (5) The distal end of the blocking member is a conical convex part, and a sealing rubber layer of a predetermined thickness is provided on the surface of the conical convex part, and one of the plugged fitting holes of the pivot member is provided with a sealing rubber layer of a predetermined thickness. The end portion is a conical concave portion corresponding to the conical convex portion of the blocking member, and the communication path is opened in the conical concave portion, so that when the blocking member moves, the conical concave portion 5. The fluid-filled vibration damping support device according to claim 1, wherein the conical convex portion is pressed to close or cut off the communication path.