JPS61180036A - Fluid filled type vibration-proof assembly - Google Patents

Abstract

PURPOSE:To enhance further the vibration-proof performance by forming to lengthen the length of an orifice communicating between two pocket parts which constitute fluid chambers. CONSTITUTION:A vibration-proof assembly is provided with an inner cylindrical sleeve 10 in which a given fitting shaft is fitted to be inserted, and to this inner cylindrical sleeve 10 a lower cushion rubber 12 as the first elastic member is fitted, and further to this cushion rubber 12 an upper cushion rubber 14 as the second elastic member is combined. And, an orifice member 16 is interposed between the two cushion rubber 12 and 14. This orifice member 16 is provided with a toroidal fluid passage 76 which is extending in the circumferential direction with a given length and provided with communicating holes 74, 74 opened to a pocket part 34 and a fluid containing part 78 respectively.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a vibration isolating support used in automobiles, etc., and in particular, it is attached to a predetermined mounting shaft and effectively damps or blocks vibrations in the axial direction. The present invention relates to a fluid-filled vibration damping assembly as a vibration damping support that is easy to assemble and manufacture and has an excellent vibration damping effect.

(Prior Art) A type of vibration-proof support used in the suspension of vehicles such as automobiles is a vibration-proof assembly that is attached to a predetermined mounting shaft and mainly damps or blocks vibrations in the axial direction. be. For example, vibration isolating supports used in automobile body mounts, cab mounts, member mounts, strut bar cushions, etc. are examples.

By the way, in such a vibration-proof support, a rubber elastic body has conventionally been used alone or in a composite with synthetic resin, canvas, etc., and vibration damping or vibration absorption has been achieved based on the elastic action of the rubber elastic body. If rubber with a low dynamic spring constant is used to reduce vibration noise in the high frequency range, the loss coefficient of the rubber will inevitably become smaller, resulting in a lower damping characteristic. Vibration (shaking) in the area
It was extremely difficult to reduce this.

On the other hand, elastic supports that can obtain both low dynamic spring characteristics and high damping characteristics by utilizing the elasticity of rubber and the flow resistance of fluid are disclosed in Japanese Patent Publication No. 48-36151 and Japanese Patent Publication No. 52-16555.
However, since all of them have a structure that receives vibration loads mainly in the radial direction, due to structural constraints, vibration isolators such as tension irons and strut bars are not recommended. It was difficult to apply it as is to a vibration-proof support that is attached so as to receive the main load in the axial direction.

(Problem to be solved) For this reason, the inventors of the present invention previously applied for patent application No. 59-5858.
As No. 4, two types of pockets opening at each end are provided in a cylindrical rubber elastic body disposed on the outer periphery of the inner cylindrical metal fitting, and a rigid cylindrical member is embedded within the rubber elastic body. , and proposed a fluid-filled vibration damping support in which the two types of pockets are communicated with appropriate orifice means, for example, a hole passing through the cylindrical wall of the cylindrical member in the axial direction. In addition to being unsatisfactory in terms of performance and manufacturability, the structure also has the problem that it is difficult to form a long orifice that allows the two types of pockets to communicate with each other.

However, as is conventionally known, the longer the length of the orifice that communicates between the two pockets that form the fluid chamber, the greater the damping effect on low-frequency vibrations. This restriction makes it impossible to further improve the vibration damping performance of the vibration damping support.

(Solution Means) Here, the present invention has been made to solve the above-mentioned problems, and its feature is that the present invention is attached to a predetermined mounting shaft and inputs mainly in the axial direction. A vibration isolating assembly designed to attenuate or block vibrations caused by the vibration, includes (a) an inner cylindrical metal fitting into which the predetermined mounting shaft is inserted, and (b) a cylindrical inner flange portion erected on the inner peripheral edge. an annular plate having at least one cutout hole in the circumferential direction; and a circular plate having a predetermined pocket portion integrally vulcanized with the plate and having an opening in a portion of the plate corresponding to the cutout hole. (c) between a first elastic member having an annular rubber elastic body and attached to the outside thereof into which the inner cylinder fitting is fitted; and (c) an outer peripheral edge of the annular plate of the first elastic member; a cylindrical outer flange which is fixed by caulking at the annular plate, and which is located opposite to the inner flange portion in the radial direction of the annular plate and forms an annular housing portion between the inner flange portion and the inner flange portion; an annular mounting bracket provided with a section, an annular end fitting attached to the inner cylindrical fitting at the inner peripheral edge, and an integral vulcanization molding between the fitting and the end fitting; a cylindrical rubber elastic body disposed at a predetermined distance around the outer periphery of the cylindrical metal fitting to form a predetermined fluid storage portion between it and the inner cylindrical metal fitting; (d) a pocket provided in the rubber elastic body of the first elastic member and the rubber of the second elastic member; (e) an inner flange portion of the annular plate of the first elastic member and an outer flange portion of the mounting bracket of the second elastic member; an annular orifice having a fluid passage extending at least a predetermined length in the circumferential direction and communicating with the pocket part of the fluid accommodation mechanism and the fluid accommodation part; and (f) a predetermined incompressible fluid respectively sealed in the pocket portion and the fluid storage portion of the fluid storage mechanism.

In the structure according to the present invention, the orifice member is preferably configured to include at least a plurality of ring members each having a circumferential groove on one side of which a circumferential groove is partially discontinuous, By overlapping these ring members, at least a portion of the fluid passage is formed by the circumferential groove, and a predetermined mounting plate is provided on the mounting bracket side of the second elastic member. Generally, a structure is adopted in which the rubber elastic body of the second elastic member is vulcanized and bonded to the mounting plate.

Further, in a preferred embodiment of the present invention, the end fitting of the second elastic member is configured to have a cylindrical mounting flange portion on its inner peripheral edge, and this mounting flange portion is formed on the inner cylindrical fitting. By being fitted into the inner hole, the second elastic member is attached to the inner cylindrical fitting, and the inner cylindrical fitting also has a flange-like shape on the outer circumferential surface of one end thereof. The first elastic member, into which the inner cylindrical metal fitting is fitted, is configured such that the movement of the inner cylindrical metal fitting in one direction in the axial direction is restricted by the receiving plate. There is.

Furthermore, according to a preferred embodiment of the present invention, the first elastic member is provided with a plurality of pockets in the circumferential direction (generally, a plurality of notched holes are provided in the annular plate corresponding to the pockets). ), and the plurality of pockets are covered by suitable orifice means, such as a circumferential groove provided in the annular plate of the first elastic member, with the annular orifice member. They are communicated by an orifice formed by the two.

Furthermore, in the present invention, preferably, the rubber elastic body of the first elastic member has an elastic cylindrical body portion that integrally extends along the inner peripheral surface of the cylindrical inner flange portion of the annular plate. By inserting the inner cylindrical fitting through the elastic cylindrical body, the load in the direction perpendicular to the axis between the annular plate and the inner cylindrical fitting is received by the elastic cylindrical body. It is configured so that

(Function/Effect) Therefore, in the orifice structure of the vibration isolating assembly according to the present invention, it is necessary to provide a through hole in a simple plate-like body as in the past, attach a communicating pipe, or attach the inner cylindrical metal fitting. Unlike those with a structure in which an orifice forming sleeve is fitted onto the surface, the inner flange of the annular plate of the former and the mounting bracket of the latter are formed by a combined connection of a first elastic member and a second elastic member. By accommodating various annular orifice members having desired passage cross-sectional areas and passage lengths in the annular accommodating portion between the outer flange portion of the Fluid passages will be skillfully formed.

As a result, the length of the orifice (communication path) can be reduced without making the structure of the orifice member, which also functions as a partition means for partitioning the pocket part and the fluid storage part that constitute the fluid storage mechanism, so complicated. It became possible to effectively increase the length, and also to set the cross-sectional area relatively arbitrarily, making it possible to effectively enhance the damping effect in the intended vibration isolating assembly.

Further, according to the structure of the present invention, the first elastic member and the second elastic member are combined, and the outer circumferential edge of the annular plate of the first elastic member and the outside of the mounting bracket of the second elastic member are combined.
By caulking and fixing the edges, it is possible to connect them all at once and form a fluid accommodation mechanism consisting of the pocket part and the fluid accommodation part at once. In such cases, the ease of assembly and manufacturability will be further improved.

(Example) Hereinafter, in order to clarify the present invention more specifically,
The embodiment will be described in detail based on the drawings.

First, FIGS. 1 and 2 respectively show a plan view and a longitudinal cross-sectional view of an embodiment of a strut bar cushion device according to a fluid-filled vibration damping assembly of the present invention.

In these figures, the vibration isolating assembly according to the present invention includes an inner cylindrical metal fitting 10 into which a predetermined mounting shaft such as a strut bar (not shown) is inserted and attached, and an inner cylindrical metal fitting 10 into which the inner cylindrical metal fitting 10 is fitted. A lower cushion rubber 12 as a first elastic member, an upper cushion rubber 14 as a second elastic member combined with this cushion rubber 12, and further these two cushion rubbers 12.1
4 and an orifice member 16 interposed between them.

By the way, as is clear from FIGS. 3 and 4, the inner cylindrical metal fitting 10 constituting the vibration isolating assembly according to the present invention includes a cylindrical body 18 and a saucer-shaped plate fixed to one end of the cylindrical body 18 by welding or the like. It is composed of a flange-like receiving plate 20. Further, a large stepped portion 22 and a small stepped portion 2 are provided on the inner and outer circumferential surfaces of the other end of the cylindrical body 18 of the inner cylindrical fitting 10.
4 are provided respectively.

Further, as is clear from FIGS. 5 and 6, the lower cushion rubber (first elastic member) 12 includes an annular plate 28 having a cylindrical inner flange portion 26 at the inner peripheral edge;
The annular plate 28 is composed of an annular rubber block 30 which is integrally vulcanized with the annular plate 28, and the annular plate 28 has three curved notch holes 32 with a predetermined phase difference in the circumferential direction. .32.32 is provided. Pocket portions 34 of a predetermined size are provided in the rubber block 30 portion so as to have openings corresponding to the notch holes 32, and the blurred portions 34 are formed in the notch holes 32. It has an open structure.

Also, the rubber block 30 of this lower cushion rubber 12
circular inner seals each extending in the circumferential direction such that the rubber material protruding from the annular plate 28 passes through the cutout hole 32 of the annular plate 28 and sandwiches the opening of the cutout hole 32 on the opposite surface of the annular plate 28; The annular plate 28 forms a protrusion 36 and an outer seal protrusion 38.
Similarly, in the curved recess 40 formed to connect the notch holes 32, 32 in the circumferential direction, the notch holes 32.3
A groove 42 is formed to connect the two.

Furthermore, the rubber block 30 extends in the axial direction along the inner circumferential surface of the inner flange portion 26 of the annular plate 28, and further includes a cylindrical portion 44 projecting a predetermined length from the inner flange portion 26. and has a ring-shaped metal fitting 46 at its tip. A circumferential rubber seal portion 48 extending integrally from the cylindrical portion 44 is formed on the outer peripheral edge of the ring-shaped fitting 46 .

On the other hand, as shown in FIGS. 7 and 8, the upper cushion rubber 14 as the second elastic member includes a cylindrical rubber block 50 and end fittings integrally vulcanized and bonded to both ends of the cylindrical rubber block 50. 52, a caulking metal fitting (mounting metal fitting) 54, and a mounting plate 56. The end fitting 52 has an annular shape and has a cylindrical mounting flange 58 on its inner peripheral edge so as to be positioned within the cylindrical rubber block 50. Further, the caulking metal fitting 54 has a cylindrical outer flange portion 60 at its annular inner peripheral edge, and a short cylindrical caulking portion 6 at its outer peripheral edge.
It has 2. Furthermore, the tip of the outer flange portion 60 of the caulking metal fitting 54 is bent inward, and a rubber seal portion 64 that extends integrally from the rubber block 50 is formed at the bent portion.

A mounting plate 56 is fitted into the cylindrical outer flange portion 60 of the caulking metal fitting 54 and is fixed to the flat portion of the caulking metal fitting 54 by projection welding or the like. As is clear from FIG. 7, this mounting plate 56 has mounting holes 66 at both ends, and is configured to be mounted to one of the two members to which vibrations are transmitted through the mounting holes 66. It has become.

The upper cushion rubber 14 is manufactured by vulcanizing the rubber block 50 in the presence of the end fitting 52, the integrated caulking fitting 54, and the mounting plate 56. It is fixed to these metal fittings and formed in one piece.

The lower cushion rubber 12 and the upper cushion rubber 14 are combined to form an annular shape between the inner flange portion 26 of the annular plate 28 and the outer flange portion 60 of the caulking metal fitting 54. The orifice member 16 accommodated in the housing portion is constructed by overlapping two ring members 68 as shown in FIGS. 9 and 10.

That is, as is clear from those figures, the ring member 68 has a circumferential groove 72 on one side of which a part is made into a discontinuous part 70, and the end of the circumferential groove 72 has a circumferential groove 72. A communication hole 74 passing through the ring member 68 in the thickness direction is formed. Then, two such ring members 68 are overlapped with their circumferential grooves 72 facing each other and their communicating holes 74 are located on the end side of the other circumferential groove 72, thereby two ring members 6
A circumferentially extending fluid passage 76 (see FIG. 2) having a length of a circumferential groove 72 with a predetermined cross-sectional area is formed between the two ends of the fluid passage 76, and at both ends of the fluid passage 76, a communication hole 74.7 is formed.
4 to communicate with both sides of the orifice member 16 in the thickness direction (the direction in which the ring members 68 are stacked).

Inner cylindrical metal fitting 10 and lower cushion rubber 1 having such a structure
2. When assembling the vibration isolating assembly shown in FIGS. 1 and 2 by combining the upper cushion rubber 14 and the orifice member 16, first place the cylinder of the inner cylindrical fitting 10 against the lower cushion rubber 12. Insert the body 18,
The lower part of the rubber block 30 of the lower cushion rubber 12 is seated on the dish-shaped receiving plate 20 of the inner cylinder fitting 10.

Next, the inner flange portion 26 of the annular plate 28 of the lower cushion rubber 12 is heated in a predetermined incompressible fluid such as water, alkylene glycol, polyalkylene glycol, silicone oil, or a liquid low molecular weight polymer. With the orifice member 16 consisting of the combined two ring members 6.8°68 fitted into the outer circumferential surface, the upper cushion rubber 14 is further overlapped with the outer circumference of the inner cylinder fitting 10. and the end fitting 5 of the upper cushion rubber 14.
While fitting the mounting flange portion 58 of No. 2 into the inner stepped portion 22 of the cylindrical body 18 of the inner cylinder fitting 10, the caulking portion 62 of the caulking fitting 54 of the upper cushion rubber 14 is caulked, and the outside of the lower cushion rubber 12 is fitted. By fixing it to the peripheral portion, the assembly operation is completed.

By such assembly, the rubber block 50, the end fitting 52, the orifice member 16, and the rubber block 30 of the lower cushion rubber 12 are integrated into the inside of the rubber block 50 of the upper cushion rubber 14. A fluid storage section 78 as one fluid chamber is formed surrounded by the cylindrical section 44 extending from the bottom and forms a fluid storage mechanism together with the pocket section 34 of the lower cushion rubber 12. Inside the storage section 78 and the pocket section 34,
As described above, since the lower cushion rubber 12 and the upper cushion rubber 14 are assembled in a predetermined incompressible fluid, such an incompressible fluid is enclosed at the same time.

In addition, in such an assembly operation, the annular orifice member 16 is attached to the annular plate 2 of the lower cushion rubber 12.
8 and the outer flange 60 of the caulking metal fitting 54 of the upper cushion rubber 14, and is held in a sandwiched state between the flange parts 26 and 60. However, the pocket portion 34 of the fluid storage mechanism and the fluid storage portion 78 are partitioned by such orifice member 16, and there are independent non-contact parts in the rubber block 30 of the lower cushion rubber 12. Three pockets 34.34.34 are formed to accommodate compressible fluid.

However, those three pocket parts 34°34.3
4 are communicated with each other by an orifice 80 formed by covering a groove 42 provided in the annular plate 28 and extending in the direction connecting the notch holes 32 in the circumferential direction with the orifice member 16. . Upper and lower fluid storage portions 7 each contain an incompressible fluid.
8 and one of the pocket portions 34 are the communication holes 74, 74 on both sides of the orifice member 16 and the fluid passage 7 extending in the circumferential direction.
6 allows them to communicate with each other.

In this way, the lower swage rubber 12 and the upper swage rubber 14 are integrally connected by crimping and fixing by the swage portion of the mounting bracket 54, but the distance between the swage metal 54 and the annular plate 28 is , is effectively sealed by the outer seal protrusion 34 provided on the annular plate 28, and the enclosed incompressible fluid does not leak out from the gap between the metal fittings, and the upper cushion rubber 14 end fitting 52 and inner cylinder fitting 1
Even at the fitting part with the end of the cylindrical body 18 of 0, the end fitting 5
2, the rubber block 30 of the lower cushion rubber 12
A metal fitting 46 at the end of a cylindrical portion 44 integrally formed with the cylindrical portion 44 is fitted and pressed against the stepped portion 24 on the outside of the cylindrical body 28, and a rubber seal portion 48 is interposed between them. This prevents the incompressible fluid within the fluid storage portion 78 from leaking to the inner cylindrical fitting 10 side.

Therefore, in the vibration isolating assembly having such a structure, a predetermined mounting shaft such as a tension iron or a strut bar is inserted and mounted into the cylindrical body 18 of the inner cylindrical metal fitting 10, and the mounting plate 56 When mounted on the vehicle body etc. through the mounting hole 66 and subjected to a vibration load mainly in the axial direction, each cushion rubber 12.1
The deformation of the rubber block 30.50 of No. 4 induces a flow of incompressible fluid between the fluid containing portion 78 and the pocket portion 34 through the fluid passageway 76 of the orifice member 16, thereby As shown, a large damping effect is exerted due to the fluid flow resistance, and effective vibration isolation can be achieved.

At that time, the fluid passage 7 that influences such vibration damping effect
The cross-sectional area and length of the annular orifice member 16
The circumferential groove 72 is positioned to extend in the circumferential direction, making it even longer, and its cross-sectional area can be arbitrarily set depending on the size of the cross-sectional area of the circumferential groove 72, so that an effective damping effect can be obtained. It becomes.

In addition, here, the lower cushion rubber 12 is provided with three pocket portions 34, 34, 34 independently, and these pocket portions are communicated with each other by the orifice 80. Even if a load of
0, so that they can also have a damping effect on such loads.

Furthermore, if a load is applied in a direction perpendicular to the axis between the inner cylinder fitting lO and the mounting plate 56,
Such a load is caused by the cylindrical portion 44 integrally extending from the rubber block 30 of the lower cushion rubber 12
Since it exists between the cylindrical body 18 and the inner flange portion 26 of the annular plate 28 of the lower cushion rubber 12, it is effectively received by the elasticity of the cylindrical portion 440.

Furthermore, according to the upper structure, the lower cushion rubber 12
By simply caulking the caulking part 62 of the caulking metal fitting 54 of the upper cushion rubber 14 to the outer peripheral edge of the annular plate 28, the assembly operation can be completed. You can further improve your work.

Although one embodiment of the present invention has been described above, it should be understood that this is a literal illustration and that the present invention is not intended to be interpreted as being limited to such embodiment. It is. The present invention may be implemented in forms with various changes, modifications, improvements, etc. made based on the knowledge of those skilled in the art, without departing from the spirit of the invention. It also includes.

For example, in the above embodiment, three pocket portions 34 provided in the lower cushion rubber 12 as the first elastic member are provided at equal angular intervals in the circumferential direction, and these pocket portions are communicated with each other through the orifice 80. However, it is sufficient that at least one such pocket is provided, and even if multiple pockets are provided, their number and relative positional relationship may vary. The structure of the pockets, such as whether these pockets are made to communicate with each other through appropriate orifice means, or whether they are made to communicate separately with the fluid storage portion 78 formed independently in the upper cushion rubber 14, may be determined depending on the purpose. It is possible to change it as appropriate.

Further, unlike the previous example, the mounting plate 56 is provided in a state fixed to the annular plate of the lower cushion rubber 12, and the outer peripheral edge of the annular plate 28 is attached to the mounting metal fitting (caulking metal fitting 54) of the upper cushion rubber 14. ) can also be secured by caulking to the outer peripheral edge.

Furthermore, yo (as is known, each cushion rubber 1
On the outer periphery of the rubber block 30.50 of 2.14, the 11th
Restraint rings 82 and 84 as shown in the figure are provided so that when a vibration load is applied, the rubber block 30 or 50 can swell largely toward the inner pocket portion 34 or fluid storage portion 78, thereby preventing the rubber block 30 or 50 from expanding. There is no problem in increasing the volume change amount, thereby increasing the flow rate of the incompressible fluid, and further improving the damping effect.

Furthermore, as shown in FIGS. 12 and 13, the orifice member 16 may be composed of two ring members 68, 68 and an annular partition plate 86 separating them. By using two partition plates 86 and arranging an annular spacer member 90 having a fluid passage 88 extending in the circumferential direction between them, the fluid passage formed in the orifice member 16 can be formed. , it is also possible to make it double or double the length. Although not shown, the spacer member 86 includes a first
In FIG. 2, a communication hole is provided to communicate the upper and lower fluid passages 76, 76, and in the example of FIG. Further, communication holes for communicating the fluid passage 88 and the lower fluid passage 76 are provided in each of the partition plates 86, 86.

In addition, the end fitting 5 of the upper cushion rubber 14
2 and the inner cylindrical fitting 10, the above-mentioned structure is the most preferable, but the structure of forming a fluid storage part in the upper cushion rubber 14 by these attachments will be understood by those skilled in the art. Based on knowledge, changes can be made as appropriate.

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the vibration isolation assembly according to the present invention, and FIG. 2 is a sectional view taken along the line II--■ in FIG. 3 to 10 respectively show members constituting such an exemplary vibration isolating assembly, in which FIG. 3 is a plan view of the inner cylindrical metal fitting, and FIG. /
-IV sectional view, FIG. 5 is a plan view of the lower cushion rubber, FIG. 6 is a sectional view taken along ■--■ in FIG. 5, FIG. 7 is a bottom view of the upper cushion rubber, and FIG. FIG. 9 is a plan view of a ring member constituting the orifice member, and FIG. 10 is a sectional view taken along line xx in FIG. 9. FIG. 11 is an explanatory cross-sectional view of main parts showing another embodiment of the present invention, and FIGS.
Each figure is an explanatory cross-sectional view of a main part showing other examples of orifice members used in the present invention. 10: Inner cylindrical metal fitting 12: Lower cushion rubber 14: Upper cushion rubber 16: Orifice member 20: Receiving plate 26: Inner flange portion 2-day annular plate 30: Rubber block 32: Notch hole 34: Pocket portion 42: Concave Groove 44: Cylindrical part 50: Rubber block 52: End metal fitting 54: Caulking metal fitting 56: Mounting plate 58:
Mounting flange portion 60: Outer flange portion 62: Caulked portion 66: Mounting hole 68: Ring member 70: Discontinuous portion 72: Circumferential groove 74: Communication hole 76: Fluid passage 78: Fluid storage portion 80 Niorifice

Claims (7)

[Claims] (1) A vibration isolation assembly that is attached to a predetermined mounting shaft and mainly damps or blocks vibrations in the axial direction, and includes an inner cylindrical metal fitting through which the predetermined mounting shaft is inserted, and an inner peripheral edge. an annular plate having a cylindrical inner flange erected thereon and having at least one cutout hole in the circumferential direction; and an annular plate integrally vulcanized with the plate and having an opening in a portion of the plate corresponding to the cutout hole. a first elastic member having an annular rubber elastic body provided with a predetermined pocket portion having a pocket portion, the inner cylinder fitting being fitted into the first elastic member and attached to the outside of the elastic member; An annular accommodating part is fixed to the outer peripheral edge of the plate by caulking, and is located opposite to the radially outer side of the inner flange of the annular plate, and is disposed between the inner flange and the annular accommodating part. an annular mounting fitting provided with a cylindrical outer flange portion forming a cylindrical outer flange portion, an annular end fitting attached to the inner cylindrical fitting at the inner circumferential edge, and a space between the mounting fitting and the end fitting. a cylindrical rubber elastic body that is integrally vulcanized and is disposed at a predetermined distance from the outer periphery of the inner cylindrical metal fitting to form a predetermined fluid storage portion between the inner cylindrical metal fitting and the inner cylindrical metal fitting; a second elastic member that is assembled and connected to the first elastic member at the outer circumference of the inner cylindrical fitting in the axial direction of the fitting; a pocket provided in the rubber elastic body of the first elastic member; a fluid storage mechanism comprising a fluid storage section formed inside a rubber elastic body of an elastic member; an inner flange portion of an annular plate of the first elastic member and an outer flange of a mounting bracket of the second elastic member; and is accommodated in the annular accommodating section formed between the fluid accommodating mechanism and the fluid accommodating section, and communicates between the pocket section of the fluid accommodating mechanism and the fluid accommodating section;
It is characterized by comprising: an annular orifice member having a fluid passage extending at least a predetermined length in the circumferential direction; and a predetermined incompressible fluid sealed in the pocket portion and the fluid storage portion of the fluid storage mechanism, respectively. Fluid-filled vibration isolation assembly. (2) The orifice member is configured to include at least a plurality of ring members each having a circumferential groove with a discontinuous portion on one side surface, and by overlapping the ring members, the The vibration isolation assembly according to claim 1, wherein at least a portion of the fluid passage is formed by the circumferential groove. (3) A predetermined mounting plate is disposed on the mounting bracket side of the second elastic member, and the rubber elastic body of the second elastic member is vulcanized and bonded to the mounting plate. The vibration isolation assembly according to item 1 or 2. (4) The end fitting of the second elastic member has a cylindrical mounting flange portion on its inner peripheral edge, and the mounting flange portion is fitted into the inner hole of the inner cylindrical fitting. A vibration isolation assembly according to any one of claims 1 to 3. (5) The inner cylindrical fitting has a flange-like receiving plate on the outer circumferential surface of one end thereof, and the first elastic member into which the inner cylindrical fitting is fitted is connected to the inner cylindrical member by the receiving plate. The vibration isolation assembly according to any one of claims 1 to 4, wherein movement of the metal fitting in one direction in the axial direction is restricted. (6) A plurality of the predetermined pocket portions are provided independently in the circumferential direction within the annular rubber elastic body, and the plurality of pocket portions are communicated with each other via a suitable communication mechanism. A vibration isolation assembly according to any one of claims 1 to 5. (7) The rubber elastic body constituting the first elastic member integrally forms a cylindrical elastic tube portion extending in the axial direction along the inner peripheral surface of the cylindrical inner flange portion of the annular plate. and by inserting the inner cylindrical metal fitting into the elastic cylindrical body part, the elastic cylindrical body part is interposed between the inner cylindrical metal fitting and the inner flange part of the annular plate. A vibration isolation assembly according to any one of claims 1 to 6.