JPH0424204Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) The present invention is a fluid-filled type damper that achieves vibration damping action based on elastic deformation of an elastic body and flow effects such as fluid flow resistance and liquid column resonance due to inertial mass effect. The present invention relates to a vibration isolating assembly, and more particularly to a fluid-filled vibration isolating assembly whose spring characteristics can be changed and controlled to have characteristics suitable for vibration damping and characteristics excellent in handling stability.

(Prior art) A type of vibration-proof support used in the suspension of vehicles such as automobiles includes an inner cylinder metal fitting, an outer cylinder metal fitting placed concentrically on the outside of the inner cylinder metal fitting, and the inner cylinder metal fitting and the outer cylinder metal fitting. It includes a rubber elastic body interposed between the metal fitting and elastically connects a predetermined shaft member inserted through the inner cylindrical metal fitting and a predetermined support member or cylindrical member attached to the outer cylindrical metal fitting. There are some types of metal fittings that exhibit a vibration-proofing effect mainly against vibrations input in the axial direction of the metal fittings. Examples include automobile suspension bushes, member mounts, and body mounts.

By the way, in the case of such a vibration-proof support, conventionally,
Rubber elastic bodies were used alone or in composites with synthetic resins, canvas, etc., and the vibration-proofing effect came to be exerted solely based on the elastic deformation of the rubber elastic bodies. There were problems in that a good damping effect could not be obtained against directional input vibrations, and vibrations that caused large displacements could not be sufficiently damped.

Therefore, in recent years, in Japanese Patent Application Laid-Open No. 60-201136, a plurality of fluid chambers are provided in a rubber elastic body so as to face each other in the axial direction, and incompressible fluid is sealed in the plurality of fluid chambers. The fluid chambers are connected through a predetermined communication path (orifice), and the incompressible fluid in the fluid chambers can mutually flow through the communication path when vibration is input in the axial direction. Three-dimensional objects have been proposed. According to such a fluid-filled vibration damping assembly, when vibration is input in the axial direction, the incompressible fluid is caused to flow between the fluid chambers through the communication path; Good damping effect can be obtained based on flow effects such as liquid column resonance due to flow resistance and inertial mass effect when moving, and therefore vibrations that cause large displacement can be well damped in a short time. It becomes.

(Problem) However, in order to obtain a good damping effect in such a fluid-filled vibration isolation assembly, it is necessary to make sure that the rubber elastic body easily deforms and the volume of the fluid chamber changes easily when vibration is input. It is necessary to
To achieve this, it is necessary to impart soft spring characteristics to the vibration isolating assembly, but there is a problem in that softening the spring characteristics in this way reduces handling stability, and these conflicting demands have to be addressed. One of the challenges was how to satisfy them.

In addition, in order to effectively obtain the damping effect of the fluid flow effect against input vibration, it is effective to increase the length of the communication passage that functions as an orifice, but conventional fluid-filled vibration isolation In the case of a three-dimensional structure, as disclosed in the above-mentioned publication (Japanese Patent Application Laid-Open No. 60-201136), the communication path was formed parallel to the axial direction of the assembly, so its length was There was a problem that severely restricted the system. Further, if an attempt was made to lengthen the communicating path in such a direction, there was a problem in that the structure for forming the communicating path had to be complicated.

(Solution) Against this background, the present invention is capable of effectively satisfying the above-mentioned conflicting demands depending on the situation, and also provides a communication path length that functions as an orifice. This was done to provide a fluid-filled vibration isolating assembly that can advantageously ensure the following with a simple structure, and its gist is: b) A cylindrical or annular inner fitting, a cylindrical outer fitting arranged concentrically at a predetermined distance on the outside of the inner fitting, and a cylindrical outer fitting interposed between the inner fitting and the outer fitting. and an annular rubber elastic body integrally connecting them, and the inner cylindrical metal fitting is attached to both ends of the inner cylindrical metal fitting such that one ends of the outer metal fitting abut each other on the inner metal fitting. (c) a pair of annular elastic members that cooperate to form a cylindrical fluid storage space between the rubber sleeve and the rubber sleeve; annular partition fittings, the partition fittings are attached to the inner cylindrical fitting in a state where they are in contact with each other, and the elastic member is fixed to the outer fitting of the elastic member at the partition fittings that are in contact with each other. (d) a pair of annular partition members that are attached to each other to partition the fluid storage space into two fluid chambers facing each other in the axial direction; and (d) the two fluids partitioned by the pair of partition members. (e) a predetermined incompressible fluid sealed in each chamber;
(f) a communication path that communicates with each one of the two fluid chambers at both ends; (g) a valve body which is movably held and connects or blocks the communication passage by rotating about one axis; an outer cylindrical fitting to be assembled; (h) located outside the outer cylindrical fitting;
The present invention is configured to include a rotation control means that is connected to the valve body through the outer cylindrical metal fitting and controls the rotation of the valve body about its rotation axis.

(Function/Effect) In such a fluid-filled vibration damping assembly, when the communication passage (orifice) is communicated by the valve body, the fluid chambers facing each other in the axial direction are communicated through the communication passage. The incompressible fluid sealed in the fluid chambers is allowed to mutually flow through the communication path, so that the incompressible fluid is caused to flow through the communication path by vibration input in the axial direction. That will happen. Therefore, in this case,
By softening the spring characteristics of the rubber elastic body and increasing the volume change of each fluid chamber in response to input vibration, it is possible to prevent flow effects such as flow resistance when incompressible fluid passes through the communication path and liquid column resonance due to the inertial mass effect. Based on this, a good vibration damping effect can be obtained.

On the other hand, when the communication path is blocked by the valve body, the flow of incompressible fluid between the fluid chambers is blocked, and the incompressible fluid is confined within each fluid chamber. The incompressible fluid sealed in the fluid chamber functions as a rigid body against input vibrations, and as a result, the spring characteristics of the vibration assembly become significantly stiffer, improving the handling stability of the vehicle.

In other words, according to the fluid-filled vibration isolating assembly according to the present invention, the vibration isolating assembly is controlled by controlling the rotation of the valve body around its rotation axis by the rotation control means disposed on the outside of the outer cylindrical metal fitting. The spring characteristics of the three-dimensional structure can be easily controlled to be hard, which is desirable for improving steering stability, and soft, which is desirable for obtaining a good vibration damping effect. Therefore, by controlling the rotation of the valve body using the rotation control means according to the surrounding conditions such as the vibration occurrence state of the vehicle and the driving condition, the spring characteristics of the vibration isolating assembly can be adjusted to the required spring characteristics at that time. It is possible to change and control the characteristics to more desirable characteristics according to the characteristics, and thereby it becomes possible to effectively satisfy the conflicting demands of vibration damping and improvement of steering stability, depending on the situation. It was.

Furthermore, in the fluid-filled vibration damping assembly according to the present invention, a connecting path extending in the circumferential direction can be formed between the partition fittings of the partition members by simply inserting the pair of partition members into the inner cylinder fitting. Since the length can be advantageously secured, the damping effect exerted by the flow action of the fluid can be obtained even more advantageously.

In addition, in such a fluid-filled vibration damping assembly, a pair of partition members are fitted over the inner cylinder fittings to form a communication path between the partition fittings, and at the same time, the communication path is communicated between the partition fittings. A pair of elastic members can be attached to both ends of the inner cylindrical fitting into which the partition members are inserted, and the elastic members can be attached to the outer side of the inner fitting. By integrally assembling the external cylindrical fitting that extends over the metal fitting, two fluid chambers facing each other in the axial direction can be easily formed, making it easy to manufacture and assemble. Moreover, it has the advantage that the length of the communicating path can be increased without complicating the structure.

Note that the blocking of the communication path in the present invention does not necessarily mean complete blocking, but is relative to the communication state, and the flow rate is significantly restricted compared to the flow rate of the incompressible fluid in the communication state. It should be interpreted as including the state in which

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

First, FIGS. 1 and 2 are longitudinal and cross-sectional views showing an example of a fluid-filled vibration damping assembly according to the present invention. The vibration isolating assembly includes a cylindrical inner metal fitting 10 into which a predetermined shaft member is inserted, and a cylindrical fluid storage space formed around the outside of the inner cylinder metal fitting 10 in cooperation with the inner cylinder metal fitting 10. a pair of annular elastic members 12, 12, and a pair of partition members 1 that are fitted over the outer peripheral surface of the inner cylinder fitting 10 and partition the fluid storage space into two fluid chambers 14, 14 in the axial direction.
6, 16, a predetermined incompressible fluid 18 sealed in the fluid chambers 14, 14, and an elastic member 12, 12, which is integrally provided on the outer periphery of the elastic member 12, 12, and is fitted over the outer periphery of the elastic member 12, 12. The bracket 20 includes an outer cylindrical metal fitting 22 that is attached to a predetermined support member (not shown). Note that as the incompressible fluid 18, for example, water, alkylene glycol, polyalkylene glycol, silicone oil, liquid low molecular weight polymer, etc. are used.

Here, as shown in FIG. 3, the inner cylindrical fitting 10 has large diameter portions 24, 24, each of which has a larger diameter at both ends of the inner peripheral portion over a predetermined length than the portion between them. In addition, annular notches 26, 26 are formed at both ends of the outer periphery.

Further, each of the elastic members 12, 12 has an annular inner metal fitting 2, as shown in FIG.
8, a cylindrical outer fitting 30 which is arranged concentrically at a certain distance on the outside, and a cylindrical outer fitting 30 which is interposed between the inner fitting 28 and the outer fitting 30 and is attached thereto by vulcanization adhesive. It consists of an annular rubber elastic body 32 that is integrally fixed to the body.

The inner metal fitting 28 has a double cylinder structure with a U-shaped cross section in which a small diameter inner cylinder part 34 and a large diameter outer cylinder part 36 are connected at one end. The portion 36 is fixed to the inner circumferential surface of the rubber elastic body 32. As shown in FIG. 1, the inner cylindrical fitting 1
0, and is also press-fitted into the outer circumferential surface of the end of a rubber sleeve 38 (to be described later) of the partition member 16 which is fitted onto the inner cylinder fitting 10 at its outer cylinder part 36, and both cylinder parts The ends of the inner tube fitting 10 and the end of the rubber sleeve 38 are sandwiched between the rubber sleeves 34 and 36, and are fixed to the ends of the inner tube fitting 10, respectively.

The inner peripheral surface of the outer cylindrical portion 36 of the inner fitting 28 is covered with a rubber layer 40 formed integrally with the rubber elastic body 32, and the outer periphery of the rubber sleeve 38 is It is designed to be press-fitted into the surface.

On the other hand, as shown in FIG. 4, the outer metal fitting 30 of the elastic member 12 is disposed in a state shifted toward the free end side of the cylindrical parts 34 and 36 with respect to the inner metal fitting 28, and these cylindrical parts The inner peripheral surfaces of 34 and 36 closer to the connecting portion are fixed to the outer peripheral surface of the rubber elastic body 32. Then, as described above, the elastic member 1
2 and 12 are fixed to the ends of the inner cylinder fittings 10 in their respective inner fittings 28, as shown in FIG. They are butted against each other to form a cylindrical fluid containing space around the outside of the inner cylinder fitting 10, as described above.

Further, as shown in FIG. 4, the end of the outer metal fitting 30 on the side fixed to the rubber elastic body 32 is a flange portion 42 bent radially outward. As will be described later, the end portion of the outer cylinder fitting 22 is caulked and fixed to the flange portion 42, so that the elastic members 12, 12 can be integrally assembled.

Note that the inner peripheral surface and end surface of the portion of the outer fitting 30 that protrudes from the rubber elastic body 32 are covered with a rubber layer 44 formed integrally with the rubber elastic body 32, as shown in FIG. As shown in the figure, when the vibration isolating assembly is assembled, the rubber layer 44 covering the end face of the outer metal fitting 30 is pressed between the outer metal fitting 30 and the partition fitting 46 of the partition member 16, which will be described later. It's getting old.

The partition members 16, 16 are provided with a cylindrical rubber sleeve 38 and an outer peripheral surface of one end of the rubber sleeve 38 by vulcanization adhesion, as shown in FIGS. 5 and 6, respectively. It consists of an annular partition fitting 46 that is integrally fixed.

The rubber sleeve 38 has a partition fitting 4 on its inner peripheral surface.
An annular metal ring 48 is integrally provided at the end opposite to the side to which the inner cylindrical fitting 10 is fixed, as shown in FIG. In a state where it is press-fitted into the notch 26, it is press-fitted onto the outer peripheral surface of the inner cylindrical metal fitting 10 and is externally inserted. By attaching the elastic member 12 to the inner cylindrical fitting 10 using the inner fitting 28, the end of the elastic member 12 is inserted between the cylindrical parts 34 and 36 of the inner fitting 28 together with the end of the inner cylindrical fitting 10, as described above. It is designed to be held and fixed. Further, in this extrapolation state, the respective partition fittings 46, 46 are brought into contact with each other.

In addition, in this embodiment, since the rubber layer 40 is formed on the inner peripheral surface of the outer cylindrical portion 36 as described above, the end portion of the rubber sleeve 38 is attached to the rubber layer 40.
Together with the inner cylindrical fitting 10 and the outer cylindrical part 3 of the inner cylindrical fitting 28
It will be squeezed between 6 and 6. In this embodiment, the inner cylindrical fitting 10 and the rubber sleeve 3
8, as well as between the rubber sleeve 38 and the elastic member 1.
2 is maintained fluid-tight. Furthermore, as is clear from FIG. 1, in this embodiment, when the elastic member 12 is attached, the rubber layer (see FIG. 5) covering the end surface of the metal ring 48 is pressed between the inner fitting 28 and the rubber layer (see FIG. 5). It is becoming more and more common. With this, the rubber sleeve 38
This ensures fluid tightness between the elastic member 12 and the elastic member 12.

On the other hand, it is fixed to the outer peripheral surface of the rubber sleeve 38,
The partition fittings 46 are brought into contact with each other by fitting the rubber sleeves 38 onto the inner cylinder fitting 10.
The outer diameter of the elastic member 12 is the outer metal fitting 30 of the elastic member 12.
As shown in FIG.
It is designed to be held between two outer metal fittings 30 and 12. Then, the outer peripheral part is connected to the elastic member 1.
By being held in this way by the outer metal fittings 30, 30 of 2, 12, both elastic members 12, 12
The cylindrical fluid storage space formed by the inner cylindrical fitting 10 is partitioned into the two fluid chambers 14, 14.

Note that the inner cylindrical metal fitting 10 of the partition members 16, 16 consisting of the partition fitting 46 and the rubber sleeve 38
The operation of inserting the elastic members 12, 12 into the inner cylindrical fitting 10 and the operation of attaching the elastic members 12, 12 to the inner cylinder fitting 10 are normally performed in a liquid tank of the incompressible fluid 18 to be sealed in the fluid chambers 14, 14. Become. In this way, the incompressible fluid 18 can be filled into the fluid chambers 14, 14 at the same time as they are formed, so that the productivity of the vibration isolation assembly can be significantly improved.

Further, as shown in FIGS. 5 and 6, each partition fitting 46 has a circumferential groove of a predetermined length (in this case, the annular groove is interrupted by a short portion) with an opening on its abutting surface. It has a circumferential groove 50 having a circular shape, and a through hole 52 located at one end of the circumferential groove 50 and penetrating the bottom wall thereof.
As shown in FIGS. 1 and 12, in a state where they are brought into contact with each other, the fluid chambers 14, A circumferential space 54 corresponding to the circumferential groove 50 is formed, which communicates with each one of the circumferential grooves 14, respectively.

That is, in this embodiment, the partition members 16, 16
As described above, each of the rubber sleeves 38 is fitted onto the inner cylindrical metal fitting 10 with a phase relationship that mutually covers the openings of the circumferential grooves 50 formed in the respective partition fittings 46, and in this state, each of the above-mentioned The elastic member 12 is adapted to be attached to the inner cylinder fitting 10, and thereby the partition fitting 46,
46, a space 54 extending in the circumferential direction as described above is formed. The incompressible fluid 18 sealed in both fluid chambers 14, 14 is then passed through the space 54 thus formed.
is arranged so that it can mutually flow between the fluid chambers 14, 14.

As is clear from the above description, in this embodiment, the space 54 is a communicating path that functions as an orifice (therefore, hereinafter, the space 54 will be referred to as the communicating path 54).
).

Furthermore, although the outer cylinder metal fitting 22 is not shown,
Both ends in the axial direction are caulked portions 56, 56 having a larger diameter than the portion between them, and as shown in FIG. 1, the elastic member 12,
The caulking parts 56, 56 are caulked while the outer metal fittings 30, 30 of No. 12 are straddled and externally inserted.
At this point, the outer metal fittings 30 are caulked and fixed to the flange portions 42 of the respective corresponding outer metal fittings 30. As a result, these outer metal fittings 30, 30,
In other words, the elastic members 12, 12 are assembled integrally. Furthermore, as described above, the opposing end surfaces of the outer metal fittings 30, 30 are pressed against the corresponding partition fittings 46, and the corresponding rubber layers 44 are compressed between them. It is designed to ensure fluid tightness between the two.

Note that a thin rubber layer 60 is integrally formed on the inner peripheral surface of the outer cylinder fitting 22 by vulcanization molding.
The outer cylinder fitting 22 is adapted to be fitted over the outer fitting 36 of each elastic member 12 and the partition fitting 46 of the partition member 16 via the rubber layer 60.
In this embodiment, each fluid chamber 14, 1
This is intended to improve fluid tightness with respect to the external space of No. 4. Further, as shown in FIG. 1, the bracket 20 is provided closer to one end of the outer metal fitting 22 in the axial direction.

In this embodiment, in such a fluid-filled vibration damping assembly, as shown in FIGS. A valve body 62 is held rotatably around one axis in the radial direction of the partition fitting 46, and by rotating the valve body 62 around the rotation axis, the communication passage 64 is opened or closed. It has become possible to shut it down,
Also, this valve body 62 is connected to the bracket 2 of the outer cylinder fitting 22.
It is connected to a drive shaft 66 of a motor 64 which is fixed at 0, and its rotational state is controlled, thereby controlling the communicating and blocking states of the communicating path 54.

That is, as shown in FIGS. 5 and 6, the partition fittings 46 of the partition member 16 include:
A partition fitting 46 is located in the circumferential center of the circumferential groove 50 and extends from the inner circumferential wall 68 to the outer circumferential wall 70 of the circumferential groove 50.
A groove 72 having a semicircular cross section and having a diameter larger than the depth of the circumferential groove 50 opens on the outer peripheral surface of the partition fitting 46.
are formed in the radial direction, and when the partition fittings 46, 46 are brought into contact as described above, the partition fittings 46 intersect the circumferential groove 50 in the radial direction between the partition fittings 46, 46. , 46 are formed with bottomed holes having circular cross sections.

Further, as shown in FIGS. 7 and 8, the valve body 62 includes a large-diameter cylindrical portion 74 and a small-diameter cylindrical portion 74 concentrically protruding from one end surface of the cylindrical portion 74. a through hole 78 located near the end of the cylindrical portion 74 on the opposite side from the side on which the engaging projection 76 is formed and perpendicular to the axis.
have. As shown in FIGS. 1 and 2, the engagement protrusion 76 is inserted into the bottomed hole formed by the grooves 72, 72, and the engagement protrusion 76 protrudes outward from the opening thereof. By being accommodated in the columnar portion 74, it is held rotatably about its axis. In the state accommodated in this bottomed hole, as shown in FIGS. 9 and 10, the communication path 54 is blocked and communicated through the through hole 78 depending on the rotational position. I'm starting to get it.

On the other hand, the engaging protrusion 76 protruding from the bottomed hole is formed on the inner surface of the outer cylindrical fitting 22 that covers the opening of the bottomed hole, as shown in FIGS. 1 and 2. The motor 6 penetrates through the rubber layer 60 and projects into a through hole 80 formed in the outer cylindrical fitting 22.
It is coaxially connected to the drive shaft 66 of No. 4.
As a result, the valve body 62 is controlled to rotate around its axis by the motor 64, and the communication passage 54 is opened by controlling the rotation of the valve body 62 by the motor 64. , the cut-off state is now controlled.

The cylindrical portion 74 of the valve body 62 is configured to come into sliding contact with the inner peripheral walls 68, 68 of the peripheral groove 50 in a flat plane. In addition, the inner peripheral wall 68 of this peripheral groove 50
A hemispherical protrusion 82 is formed at the center of the end surface of the cylindrical portion 74 that is brought into sliding contact with the valve body 6, as shown in detail in FIG.
2 is accommodated in the bottomed hole with the protrusion 82 fitted in a hemispherical recess 84 formed across the partition fittings 46, 46.

In such a fluid-filled vibration damping support, as shown in FIG. 9, the valve body 62 is rotated to a position where the through hole 78 formed therein communicates with the communication passage 54. and fluid chamber 1
4 and 14 are communicated through a communication path 54, and the incompressible fluid 18 contained therein is communicated with the communication path 54.
Because mutual flow is allowed through
The incompressible fluid 18 contained in the fluid chambers 14, 14 is caused to flow through the communication path 54 in response to changes in the volumes of the fluid chambers 14, 14. Therefore, each rubber elastic body 32 of the elastic members 12, 12 is made soft so that the volumes of the fluid chambers 14, 14 are greatly changed in response to the input vibration in the axial direction. By increasing the flow rate of the compressible fluid 18,
Flow effects such as flow resistance when the incompressible fluid 18 passes through the communication path 54 and liquid column resonance due to the inertial mass effect can be increased. That is, input vibration in the axial direction can be effectively damped based on flow effects such as flow resistance when the incompressible fluid 18 passes through the communication path 54 and liquid column resonance due to the inertial mass effect.

On the other hand, when the valve body 62 is rotated 90 degrees from the state shown in FIG.
The through hole 78 of No. 2 opens its opening to the inner wall of the bottomed hole (groove 7
2 and 72), the communication path 54 is blocked, and the flow of the incompressible fluid 18 between the fluid chambers 14 and 14 is blocked, and the incompressible fluid 18 flows into each fluid chamber. 14, 14. Therefore, at this time,
The incompressible fluid 18 sealed in the fluid chambers 14, 14 functions as a rigid body against input vibrations, and as a result, the spring characteristics of the vibration isolating assembly become significantly stiffer, improving the steering stability of the vehicle. will improve.

In other words, according to the fluid-filled vibration isolating assembly of this embodiment, the spring characteristics in the axial direction of the vibration isolating assembly can be adjusted by rotating the valve body 62 between the two positions using the motor 64. , the motor 64 can be easily controlled to have a soft spring characteristic that provides good damping characteristics against vibration input in the axial direction, and a hard spring characteristic that is good for improving steering stability. By controlling the rotation of the valve body 62 according to the vibration generation state of the vehicle, the driving state, and other surrounding conditions, the spring characteristics of the vibration isolating assembly can be adjusted to more desirable characteristics according to the characteristics required at that time. Changes can be controlled. Therefore, it is possible to effectively satisfy the conflicting demands of vibration damping and improvement of steering stability, depending on the situation.

Furthermore, as is clear from the above description, according to the fluid-filled vibration isolating assembly of this embodiment, the inner cylinder fitting 1
By simply extrapolating the pair of partition members 16, 16 to 0, it is possible to form a communication path 54 extending in the circumferential direction between the partition fittings 46, 46 of the partition members 16, 16, and to A valve body 62 that communicates or blocks the communication path 54 between
In addition, a pair of elastic members 1 are attached to both ends of the inner cylindrical fitting 10 into which the partition members 16 and 16 are inserted.
2 and 12 at their inner metal fittings 28 and 28, and by integrally assembling these elastic members 12 and 12 with the outer cylindrical metal fitting 22 which is fitted over the outer metal fittings 30 and 30, Two fluid chambers 14, 1 facing each other in the axial direction
4 can be easily formed. Therefore, with good manufacturability or assemblability,
Moreover, the communication path 54 can be
It has also become possible to make the length of the wire longer than before.

In addition, in this embodiment, as mentioned above, the members forming each pair have the same shape and are interchangeable, so in this sense, it has the advantage of being excellent in mass production. There is.

Although one embodiment of the present invention has been described above, this is a literal illustration, and it goes without saying that the present invention should not be interpreted as being limited to this specific example.

For example, in the embodiment described above, the through hole 78 is formed perpendicularly to the axis of the valve body 62, and the communication path 54 is communicated through the through hole 78. The valve body 52 is not limited to this, and it is possible to communicate with the valve body 52 by, for example, a circumferential groove formed in the outer circumferential portion of the valve body 52.

Further, in the embodiment, the valve body 62 is connected to the partition fitting 4.
6 and 46 in the center of the communication path 54, the pair of partition members 1
6 and 16 have the same shape and are compatible with each other, however, the holding position of the valve body 62 does not necessarily have to be in the center of the communicating path 54, but may be in the middle thereof. .

Further, in the embodiment, the valve body 62 is connected to the motor 64.
However, the rotation control means for controlling the rotation of the valve body 62 is not limited to this, and other drive control means such as a rotary solenoid may be used. It is also possible.

Further, in the above embodiment, an example was described in which the present invention is applied to a vibration isolating assembly in which the outer cylindrical fitting 22 is fixed to the partition member by the bracket 20 provided on the outer periphery thereof. is not limited to this, but as shown in FIG. 11, the outer cylindrical fitting 22 is inserted and attached to a predetermined cylindrical member (not shown) at its outer periphery.
It is also possible to apply the present invention to a so-called bush type fluid-filled vibration damping assembly. In addition, the 11th
As shown in the figure, the inner fitting 28 of the elastic member 12 may be cylindrical, and the elastic members 12, 12 are integrally formed by roll caulking at both ends of the outer cylindrical fitting 22. It may also be possible to assemble it into the

In addition, the present invention is applicable to suspension bushes, member mounts, and
Particularly suitable for use in body mounts, etc.
It can also be applied to other vibration-proof assemblies.

In addition, the shape of each member, the seal structure of each part, the assembly structure, etc. will not be listed individually, but the present invention can be implemented with various changes, modifications, improvements, etc. without departing from the gist thereof. It goes without saying that.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view (-cross-sectional view of FIG. 2) showing one embodiment of the present invention, and FIG.
FIG. FIG. 3 is a partially cutaway front view showing the inner cylindrical metal fitting of the embodiment shown in FIG. 1, and FIG. 4 is a front sectional view showing the elastic member. FIG. 5 is a longitudinal cross-sectional view (-cross-sectional view in FIG. 6) showing the partition member of the embodiment shown in FIG. 1, and FIG. 6 is a bottom view thereof. 7 and 8 are a front view and a plan view, respectively, showing the valve body of the embodiment shown in FIG. 1.
9 and 10 are enlarged sectional views of essential parts of FIG. 1 in different operating modes of the embodiment of FIG. 1, respectively. FIG. 11 is a diagram corresponding to FIG. 1 showing an embodiment different from the embodiment in FIG. 1. 10...Inner cylinder metal fitting, 12...Elastic member, 14...
...fluid chamber, 16 ... partition member, 18 ... incompressible fluid, 20 ... bracket, 22 ... outer cylinder fitting,
28...Inner metal fitting, 30...Outer metal fitting, 32...
Rubber elastic body, 38...Rubber sleeve, 46...Partition fitting, 50...Peripheral groove, 52...Through hole, 54...
Communication path (space), 62...valve body, 64...motor,
78...Through hole.

Claims (1)

[Claims for Utility Model Registration] A cylindrical metal fitting; a cylindrical or annular inner metal fitting; a cylindrical outer metal fitting concentrically arranged at a predetermined distance on the outside of the inner metal fitting; an annular rubber elastic body interposed between the metal fitting and the outer metal fitting to integrally connect them; both ends of the inner cylindrical metal fitting such that one ends of the outer metal fitting abut each other at the inner metal fitting; a pair of annular elastic members that cooperate to form a cylindrical fluid storage space between the inner cylindrical fitting and the inner cylindrical fitting; a rubber sleeve; and an outer periphery of one end of the rubber sleeve in the axial direction; an annular partition fitting integrally fixed to the surface, the partition fittings are attached to the inner cylindrical fitting by being fitted onto the inner cylinder fitting in a state where they are in contact with each other;
a pair of annular partition members that partition the fluid storage space into two fluid chambers facing each other in the axial direction by being fixedly attached to the outer metal fittings of the elastic member in the partition fittings brought into contact with each other; and; a predetermined incompressible fluid respectively sealed in the two fluid chambers partitioned by the pair of partition members; a communication path that communicates with each one of the two fluid chambers at both ends; and a communication path held rotatably about one axis in the radial direction of the partition fittings by the pair of partition fittings at an intermediate portion of the communication path; a valve body that connects or blocks the communication passage by rotating around one axis; an outer cylindrical metal fitting that is fitted over each of the outer metal fittings of the elastic member and assembles them integrally; a rotation control means disposed outside the outer cylindrical metal fitting, connected to the valve body through the outer cylindrical metal fitting, and controlling the rotation of the valve body about its rotation axis;
A fluid-filled vibration isolation assembly comprising: