JPH028173B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a fluid-filled vibration isolating assembly, and particularly relates to a fluid-filled vibration damping assembly that is easy to assemble and manufacture, and which is capable of exhibiting high damping characteristics that are particularly effective against vibration input. The present invention relates to a fluid-filled vibration damping assembly with good sealing properties.

(Prior Art) Conventionally, a structure in which a rubber block is interposed between two mounting brackets has been used as a vibration-proof support for automobile body mounts, cab mounts, suspension rods, strut bar cushions, etc. However, if rubber with a low dynamic spring constant is used to reduce vibration noise in the high frequency range, the damping characteristics will be low due to the small loss coefficient of the rubber, and therefore such vibration-proof supports It was not possible to fully satisfy the characteristics required for this purpose. However, such a vibration-proof support is required to have high damping characteristics to reduce vibration in the low frequency range and low dynamic spring characteristics to reduce noise in the high frequency range. be.

On the other hand, in order to meet this demand, an elastic support body having a structure that utilizes the elasticity of rubber and the flow resistance of fluid has been proposed in Japanese Patent Application Laid-Open No. 5376/1983. This fluid-filled elastic support has damping properties due to the damping effect due to the elasticity of the rubber as well as the flow resistance effect caused by the fluid passing through the small pores that communicate the two separately formed spaces. With this, low dynamic spring characteristics and high damping characteristics were achieved, but due to its structure, the damping characteristics were limited to one direction, and vibrations occurred in a direction perpendicular to that direction. However, there was a major problem in that the damping effect was insufficient.

For this reason, the applicant of this application first filed a patent application filed in 1983-
In No. 145647 (Japanese Unexamined Patent Publication No. 59-37349), he disclosed a fluid-filled elastic support structure that can exhibit such a damping effect in two orthogonal directions. As shown in FIGS. 15 and 16, this anti-vibration support body proposed previously has an inner cylindrical fitting 110.
Two types of fluid chambers 118 are provided between the outer cylinder fitting 112 and
120 and two types of rubber elastic bodies 114 and 116 are respectively provided, and the vibration in the axial direction is effectively suppressed by the elasticity of one of the rubber elastic bodies 114 and the resistance of fluid flow between the fluid chambers. On the other hand, the other rubber elastic body 116 is designed to exert a damping effect, while the other rubber elastic body 116
An effective damping effect is exerted by the elasticity of the fluid chamber and the fluid flow resistance between different combinations of fluid chambers.

(Problem) By the way, in order to exhibit such damping effects in different directions, two types of rubber elastic bodies 1
14, 116 and two types of fluid chambers 118, 120 must be formed between the inner cylindrical fitting 110 and the outer cylindrical fitting 112, respectively. By preparing two divided bodies 116a and 116b, each having a sleeve fixed to the inner and outer peripheral surfaces of a ring-shaped rubber, and press-fitting these divided bodies between a predetermined inner cylindrical fitting 110 and outer cylindrical fitting 112. , the divided body 116
A predetermined fluid chamber 120 is formed between the two divided bodies 116a and 116b by utilizing the elasticity of the rubber of the divided bodies 116a and 116b.
The press-fitting operation of 116b is not easy when assembling the vibration isolating support, and there are considerable problems inherent in its manufacturing work.

In addition, the two divided bodies 116 that are press-fitted
The outer peripheral surfaces of a and 116b are connected to each fluid chamber 118 and 12.
It needs to be polished to prevent leakage of fluid from the 0, but each such polishing operation is tedious, along with a pre-compression operation to improve the durability of the rubber applied to the segment. Furthermore, even if the outer circumferential surfaces of the respective divided bodies 116a and 116b are precisely polished, there is a risk that the fluid sealed in the respective fluid chambers may leak between the inner cylindrical fitting 110 and the outer cylindrical fitting 112 that are press-fitted. There is a problem that it is difficult to completely seal the seal.

Moreover, the orifice mechanism that connects the two fluid chambers 118 and 120 in such a fluid-filled vibration damping support is generally provided on the inner cylinder metal fitting side, and the inner cylinder metal fitting 110 provided with such an orifice mechanism is generally provided on the inner cylinder metal fitting side. Since the axial length of the orifice is determined as the orifice length, the orifice length is limited, and since a sufficient orifice length cannot be formed, there is also the problem that the damping performance is restricted.

The present invention has been made against this background, and its purpose is to utilize the flow resistance of a fluid medium between two chambers to exhibit high damping characteristics. In the vibration-proof support, assembly and manufacturing thereof are facilitated, leakage of the fluid medium sealed in each chamber is effectively prevented, and the length of the orifice can be effectively increased. An object of the present invention is to provide a fluid-filled vibration damping assembly whose damping characteristics can be improved.

(Solution Means) In order to achieve such an object, the present invention provides (a) an outer cylindrical metal fitting having a flange portion projecting laterally at one end, and an outer cylindrical metal fitting that is inserted and arranged concentrically therein. A first rubber elastic body is provided between the flange portion and the inner cylinder fitting to connect them, and between the flange portion and an annular caulking fitting located at a predetermined distance on the outside in the axial direction of the flange portion. The second cylindrical rubber elastic body is integrally vulcanized and bonded,
(b) a mount body having a concave space formed around the inner cylindrical metal fitting; (c) a partition bushing member including a rubber sleeve and an inner rigid sleeve fixed to the inner circumferential surface of the rubber sleeve, the partition bushing member being positioned so as to partition the recess space; a first fluid chamber press-fitted into the inner peripheral surface of the outer cylindrical metal fitting of the mount body and surrounded by the partition bushing member, the inner cylindrical metal fitting, the outer cylindrical metal fitting and the first rubber elastic body; A circumferential orifice is provided in an open state at the metal part to communicate the partition bushing member, the inner cylindrical metal fitting, the outer cylindrical metal fitting, and the second fluid chamber formed between the second rubber elastic body. (d) is crimped and fixed to the crimping fitting in a state in which the first fluid chamber and the second fluid chamber are filled with a predetermined incompressible fluid; The intended fluid-filled vibration isolating assembly is configured to include a lid member that covers the opening of the fluid chamber.

In the fluid-filled vibration damping assembly according to the present invention, it is preferable that the orifice member is press-fitted and fixed to the outer peripheral surface of the partition bushing member via an outer rigid sleeve. , the orifice member has a cylindrical shape and has a circumferential groove on its outer peripheral surface,
By covering the circumferential groove with the inner circumferential surface of the outer cylindrical metal fitting, a circumferential orifice is formed that communicates the first fluid chamber and the second fluid chamber. It is desirable that and,
From a manufacturing standpoint, such an orifice member is generally constructed by combining two cylindrical bodies, and a circumferential notch provided on the outer peripheral surface of each of the two cylindrical bodies The combination forms the circumferential groove.

The inner cylindrical metal fitting is configured to have a rubber layer on the outer circumferential surface into which the partition bushing member is fitted, and an inner rigid sleeve of the partition bushing member is fitted onto the rubber layer, and further An orifice member provided on the outer circumferential portion of the partition bushing member is press-fitted into the inner circumferential surface of the outer cylindrical metal fitting. The inner cylindrical metal fitting is preferably configured with a stepped outer peripheral surface in which the outer peripheral surface portion into which the partition bushing member is inserted is a small diameter portion, while the inner rigid sleeve of the partition bushing member is configured with a stepped outer peripheral surface having a small diameter portion. The inner rigid sleeve of the partition bushing member has a length substantially equal to the axial length of the inner cylinder fitting, and is fitted into the small diameter portion of the inner cylinder fitting, and one end of the partition bushing member contacts the stepped portion of the outer circumferential surface of the inner cylinder fitting. The second fluid chamber is brought into contact with the second fluid chamber and is restrained at the other end by a lid member that covers the second fluid chamber, thereby being configured to be prevented from moving in the axial direction.

Furthermore, according to a preferred embodiment of the present invention, the lid member has a cylindrical portion that is fitted into the end of the inner cylindrical metal fitting, and when the cylindrical portion is fitted, the peripheral edge of the lid member is The partition bushing member, which is configured to be fixed by caulking with a caulking metal fitting and is configured to mainly receive vibrations applied from a direction perpendicular to the axis, has a rubber sleeve inside the partition bushing that extends in the circumferential direction. At least one of the rigid plates extending over a predetermined length is embedded, and its rigidity is varied in the circumferential direction.

(Function/Effect) In the fluid-filled vibration damping assembly according to the present invention, the elastic action of the second rubber elastic body of the mount body and the fluid flow resistance between the first and second fluid chambers Due to this, and mainly due to the elastic action of the rubber sleeve of the partition bushing member, an effective damping effect can be exerted against vibrations input from both the axial direction and the direction perpendicular thereto. It will become.

In addition, in the present invention, the first rubber elastic body and the second rubber elastic body are integrally vulcanized and bonded between the inner cylinder fitting and the outer cylinder fitting and on the outside of the flange portion of the outer cylinder fitting. The desired first fluid chamber and second fluid chamber are formed by simply constructing a mount body, and fitting and attaching a predetermined partition bushing member between the inner and outer cylindrical metal fittings of the mount body. The fact that the assembly is easy, as well as the manufacturing process, is not only easy, but also because the first rubber elastic body that connects the inner and outer metal fittings is made by vulcanization bonding. Since the first rubber elastic body is fixed to these bodies and does not have the conventional press-fit structure of the divided body, leakage of fluid from between the first rubber elastic body and the inner cylindrical metal fitting and the outer cylindrical metal fitting is completely prevented. Naturally, surface polishing operations to prevent such fluid leakage were completely unnecessary.

Moreover, the orifice that communicates the first fluid chamber with the second fluid chamber is formed in the circumferential direction between the partition bushing member and the outer cylindrical metal fitting by an orifice member that is press-fitted into the outer cylindrical metal fitting. As a result, the orifice length can be set to a sufficient length, and an orifice with a uniform cross-sectional area can be formed, thereby reducing the damping effect based on the flow resistance of the fluid flowing through the orifice. It became possible to effectively increase the

(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, FIGS. 1 and 2 show an example of a fluid-filled cab mount which is a vibration isolating assembly according to the present invention. An inner cylindrical metal fitting 10 into which a predetermined mounting bolt is inserted, an outer cylindrical metal fitting 12 arranged outside the inner cylindrical metal fitting 10 at a predetermined distance, and vulcanized bonding is made between the inner cylindrical metal fitting 10 and the outer cylindrical metal fitting 12. The rubber connecting body 14 as the first rubber elastic body and the outer cylinder fitting 1
a cylindrical rubber ring 16 constituting a second rubber elastic body vulcanized and bonded to the rubber ring 16;
The main element includes a mount body 20 having a caulking metal fitting 18 vulcanized and bonded to the mount body 20 and a partition bushing member 22 fitted between the mount body 20 and the inner cylinder metal fitting 10 and the outer cylinder metal fitting 12.
, a lid member 24 that covers the inner recessed space formed by the inner cylindrical metal fitting 10, the outer cylindrical metal fitting 12, the rubber connecting body 14, and the rubber ring 16; and the recessed space is covered by the partition bushing member 22. It is substantially composed of a predetermined incompressible fluid 30 filled in a first chamber 26 and a second chamber 28 formed by partitioning.

More specifically, as shown in FIG. 3, the mount body 20 of the cab mount has an inner cylindrical metal fitting 10 at its center, and this inner cylindrical metal fitting 10 has one end in the axial direction. The inside of the part is a stepped hole 32, and the outer circumferential surface on the side where the stepped hole 32 is provided is a stepped small path 34 extending over a predetermined length in the axial direction. A rubber layer 3 of a predetermined thickness is provided on the entire outer peripheral surface of 34.
6 is provided, and this rubber layer 36 is further provided with the inner cylinder metal fitting 1.
The seal portion 38 is configured to protrude from the end face of the seal portion 0 and serve as a seal portion 38. In addition, the inner cylinder fitting 10
The rubber connecting body 14 is fixed to the outer peripheral surface of the large diameter portion 40 on the other end side by vulcanization adhesive.

Further, the outer cylinder fitting 12 is provided with a flange portion 42 projecting laterally at one end in the axial direction, and the flange portion 42 has a flange portion 42 that is folded back in the axial direction at a symmetrical position. A mounting bracket portion 44 is formed with mounting bolt holes 46 extending therethrough. In addition, in FIG. 1, the planar form of the mounting bracket portion 44 before being folded back is shown by a two-dot chain line.

Between the inner tube fitting 10 and the outer tube fitting 12, there is a gap between the end portion of the outer tube fitting 12 on the side opposite to the side where the flange portion 42 is formed and the large diameter portion 4 of the inner tube fitting 10.
0, a predetermined rubber connecting body 14 is integrally vulcanized and bonded. Also,
A cylindrical rubber ring 16 of a predetermined thickness is fixed concentrically to the outer surface in the axial direction of the flange portion 42 of the outer cylinder fitting 12 by an integral vulcanization adhesive method, and A ring-shaped caulking fitting 18 having an L-shaped stepped surface is fixed to the end face of the ring 16 by vulcanization adhesive. Although not shown, a restraining ring is embedded in the outer circumference of the rubber ring 16 as necessary to prevent the rubber ring 16 from deforming outward. Further, a sealing rubber 48 is fixed and disposed in an annular shape along the inner peripheral edge of the caulking metal fitting 18.

The mount main body 20 having such a configuration is made by integrally vulcanizing the rubber connecting body 14 and the rubber ring 16 in the presence of the inner cylinder fitting 10, the outer cylinder fitting 12, and the caulking metal fitting 18, thereby achieving vulcanization bonding. The rubber layer 36 and the seal rubber 48 are also formed at the same time in such a vulcanization molding operation. In the mount main body 20 having such a structure, the recessed space 5 which becomes the first chamber 26 and the second chamber 28 is formed by the inner tube fitting 10, the outer tube fitting 12, the rubber connecting body 14, and the rubber ring 16.
0 will be formed.

On the other hand, the partition bushing member 22 includes an annular rubber member 52 as shown in FIGS. 4 and 5.
Metal sleeves, that is, an inner sleeve 54 and an outer sleeve 56, are fixed to the inner and outer circumferential surfaces of the inner and outer circumferences, respectively, by vulcanization adhesive or the like, thereby forming an integral structure. As is clear from FIGS. 5 and 2, the inner sleeve 54 is connected to the outer sleeve 5.
The length in the axial direction is longer than that of the inner tube 6, and is approximately equal to the length of the small diameter portion 34 of the inner cylinder fitting 10. Further, the rubber member 52 has hollow portions (recesses) 57, 5 of a predetermined length at symmetrical positions on both end faces thereof.
7 are provided, and the slotted portions 5
Arc-shaped metal plates 58, 58 located symmetrically in a direction perpendicular to the direction connecting 7, 57 are buried at a predetermined length, and the arrangement of the metal plates 58 and the hollow portion 57 allows The rigidity in the radial direction is designed to differ in the circumferential direction.

Further, an orifice member 6 is press-fitted into the outer peripheral surface of the outer sleeve 56 of the partition bushing member 22 to form an orifice in a predetermined circumferential direction.
0 is constructed by combining two orifice forming cylinders 62 as shown in FIGS. 6 and 7. That is, this orifice forming cylinder 62 has a circumferential groove forming notch 6 provided on its outer peripheral surface.
4, and this groove forming notch 64 is
A communication notch 66 formed in a part of the remaining outer circumferential surface in the circumferential direction allows for communication in the axial direction. Then, using two such orifice forming cylinders 62, as shown in FIGS. 8 and 9, they are assembled symmetrically so that the groove forming notches 64 are brought into contact with each other. Therefore, the orifice member 60 is configured in which the circumferential groove 68 is formed on the outer circumferential surface, and the circumferential groove 68 can be communicated in the axial direction by the communicating notches 66, 66.

That is, the orifice member 60 constructed by combining the two orifice forming cylinders 62, 62 as described above is connected to the partition bushing member 22 described above.
The outer sleeve 56 of the mount body 20 is press-fitted and fixed, and the outer sleeve 56 of the mount body 20
The orifice member 6 is press-fitted into the
An orifice 70 is formed by covering the circumferential groove 68 of No. 0 with the inner circumferential surface of the outer cylindrical fitting 12, and the orifice 70 is connected to a communication hole formed at each end in the axial direction. Notch portions 66, 6
6 communicates with the first chamber 26 and the second chamber 28, respectively, and as a whole, these two chambers 26,
28 can be communicated with each other.

Note that when assembling the cab mount according to the present invention as shown in FIGS. 1 and 2 using the components shown in FIGS. 3 to 9, first the components shown in FIGS. The two orifice forming cylinders 62,
62 is press-fitted and fixed, and it is attached to the mount body 20 shown in FIG. 3 with water, alkylene glycol, polyalkylene glycol,
The partition bushing member 22 is fitted into the incompressible fluid 30 such as silicone oil or a low molecular weight polymer so that the inner sleeve 54 of the partition bushing member 22 is positioned on the small diameter portion 34 and the rubber layer 36 of the inner cylinder fitting 10. At the same time, the orifice member 60 is press-fitted into the inner surface of the outer cylindrical metal fitting 12. By this press-fitting operation, the recessed space 50 formed around the inner cylindrical fitting 10 of the mount main body 20 is divided into two, and the partition bushing member 22, the inner cylindrical fitting 10, the outer cylindrical fitting 12, and the rubber connecting body are divided into two parts. A first chamber 26 surrounded by 14 is formed in the circumferential direction. Further, the orifice member 60 provided on the outer circumferential surface of the partition bushing member 22 that is press-fitted forms an orifice 70 along the inner circumferential surface of the outer cylinder fitting 12. The annular first chamber 26 thus formed is filled with the incompressible fluid 30.

Next, the inner cylindrical metal fitting 10 is inserted into the mount main body 20 into which the partition bushing member 22 is press-fitted.
The partition bushing member 22 is fitted and press-fitted until one end surface of the inner sleeve 54 is aligned with the end surface of the inner sleeve 54, and the other end surface of the inner sleeve 54 is pressed against the stepped portion of the outer circumferential surface of the inner cylinder fitting 10. After it is applied and its position is fixed, the cylindrical part 72 provided on the disc-shaped lid member 24 is fitted into the stepped hole 32 formed inside the end of the inner cylindrical metal fitting 10, By caulking and fixing the peripheral edge portion with the caulking metal fitting 18, the assembly operation is completed and the desired cab mount is formed. That is, the opening in the caulking metal fitting 18 portion of the second chamber 28 formed between the partition bushing member 22, the inner cylinder fitting 12, the outer cylinder fitting 12, and the rubber ring 16 is covered with the lid member 24, and These are the end face of the inner cylinder fitting 10 (sealing part 38 part) and the caulking fitting 18 (sealing rubber 48 part).
The second chamber 28 is made liquid-tight by being firmly abutted and pressed by the second chamber 28.

In addition, the first chamber 26 and the second chamber 28 formed in this way have a circumferential groove 68 formed on the outer circumferential surface of the orifice forming cylinders 62 and 62 constituting the orifice member 60. Through the orifice 70 formed by being covered by the inner circumferential surface of 12, the orifice 70 is located at both ends in the axial direction.
The chambers are communicated with each other by communicating with each other. In short, the first chamber 26 and the second chamber 28 are formed by an orifice 70 extending in the circumferential direction.
This allows them to communicate with each other.

Therefore, when a cab mount with such a configuration is subjected to vibration as a load in its axial direction,
The incompressible fluid 30 flows from the first chamber 26 side to the second chamber 2.
8 side or in the opposite direction through the orifice 70 and the communicating notches 66, 66 at both ends thereof, and the first chamber 2
6 and the second chamber 28 .
A predetermined flow resistance is developed in the rubber ring 16, and by means of this flow resistance and together with the elastic action of the rubber ring 16, effective vibration damping can be achieved as a whole. Moreover, even if a vibration load is applied in a direction perpendicular to the mount axis direction, the vibration load is mainly applied to the inner cylinder fitting 10 and the outer cylinder fitting 12.
Partition bushing member 2 interposed between
2. More specifically, it is received by the cylindrical rubber member 52 and is vibration-proofed, but also other rubber members, in other words, the rubber connecting body 14,
The rubber ring 16 also exhibits a certain degree of vibration damping effect. Note that, depending on the vibration input in the direction perpendicular to the axial direction, almost no flow of the fluid 30 between the first chamber 26 and the second chamber 28 is caused.

In the cab mount as a fluid-filled vibration isolating assembly having such characteristics, the space between the inner cylindrical metal fitting 10 and the outer cylindrical metal fitting 12 is connected to the rubber connecting body 14 as the first rubber elastic body. The rubber ring 16, which is a second rubber elastic body, is connected to the flange portion 42 of the outer cylinder fitting 12 by vulcanization adhesion.
The mount body 20 is vulcanized and bonded to the mount body 20, and by simply press-fitting the partition bushing member 22, which has an orifice member 60 on its outer periphery, two fluid chambers, that is, a first chamber 26 and a first chamber 26, are formed. Since the second chamber 28 is formed,
The assembly work could be significantly simplified and facilitated, and the manufacturing process could also be carried out advantageously. Moreover, unlike the conventional case in which a plurality of liquid chamber forming bodies are sequentially press-fitted to form a plurality of liquid chambers, the rubber connecting body 14 forming the first chamber 26
Since the outer surface of the inner cylindrical fitting 10 and the inner surface of the outer cylindrical fitting 12 are vulcanized and bonded, there is no possibility that the incompressible fluid 30 leaks to the outside through the gap between them. Therefore, the problem of fluid leakage to the outside from the press-fitted part of the divided body, which is a problem in the conventional press-fitted structure of the rubber divided body, can be completely solved.

Furthermore, since the rubber connecting body 14 for forming the first chamber 26 is not interposed between the inner cylindrical metal fitting 10 and the outer cylindrical metal fitting 12 with a press-fit structure, it is possible to improve the sealing effect. The surface polishing operation is also completely unnecessary, and in the combination of the pre-compression operation and the surface polishing operation for such rubber connections, there is no need to strictly control the extent of these individual processes. It was.

Moreover, since the orifice 70 that communicates the first chamber 26 and the second chamber 28 is provided in the circumferential direction along the inner surface of the outer cylinder fitting 12,
Unlike the conventional case where it is provided in the axial direction on the inner cylinder metal fitting 10 side, its length can be effectively increased,
Furthermore, since its cross-sectional area can be determined by the size of the structure-forming notch 64, it can be set arbitrarily and can be made uniform, resulting in an even more effective damping effect. It has become possible to demonstrate this.

Although various examples of the vibration isolating assembly according to the present invention have been described above, the present invention is not to be construed as being limited to such specific examples, and as long as it does not depart from the spirit of the present invention. ,
Various changes, modifications, improvements, etc. can be made to the present invention, and such embodiments belong to the scope of the present invention;
It goes without saying.

For example, in the example, the orifice member 6
0 is constructed so that the length of the orifice 70 is at most half the circumference, but it is possible to combine two orifice forming cylinders 74 as shown in FIGS. 10 to 14. By using the orifice member 60, it is possible to form the orifice 70 with a length corresponding to approximately the entire circumference of the orifice member 60. That is, such an orifice forming cylinder 74
As is clear from FIGS. 10 and 11,
Although it has a groove forming notch 64 and a communicating notch 66, a large diameter portion (an uncut portion) adjacent to the communicating notch 66 makes the groove forming notch 64 discontinuous. ) 76 is formed. Then, the large diameter portions 76 are positioned in correspondence with each other, and the two orifice forming cylinders 74, 74 are placed in the same manner as in the previous example.
By further locating the communicating notches 66 on both sides of the large diameter portion 76, the circumferential groove 68 is formed over almost the entire circumference, and this is formed on the inner surface of the outer cylindrical fitting 12. By covering the entire circumference, an orifice 70 is formed that extends over substantially the entire circumference.

Further, as illustrated above, the orifice member 60
It is desirable to have a structure in which the partition bushing member 22 is press-fitted through its outer sleeve 56 in terms of ease of manufacturing and assembly work. Alternatively, it is also possible to use the outer sleeve 56 as it is as an orifice member and to form an orifice by carving a circumferential groove on its outer peripheral surface.

Furthermore, the present invention can be applied not only to the cab mount as described above, but also to other anti-vibration supports such as body mounts and member mounts.

[Brief explanation of drawings]

FIG. 1 is a plan view of a cab mount according to an example of a fluid-filled vibration isolation assembly according to the present invention, and FIG. 2 is a cross-sectional view taken in FIG. 1. Third
9 to 9 show the components of the cab mount in FIGS. 1 and 2, respectively, with FIG. 3 being a sectional view of the mount body, and FIG. 4 being a plan view of the partition bushing member. 5 is a sectional view of the orifice forming cylinder in FIG. 4, FIG. 6 is a plan view of the orifice forming cylinder shown in FIG. 5, FIG. 7 is a sectional view of the orifice forming cylinder shown in FIG. FIG. 9 is a plan view of an orifice member formed by combining two orifice members, and FIG. 9 is a sectional view taken in FIG. 8. 10 to 14 show other examples of the orifice forming cylinder and orifice member used in the present invention, FIG. 10 is a plan view of the orifice forming cylinder, FIG. 11 and FIG. Figure 12 is a cross-sectional view of XI-XI and XII-XII in Figure 10, respectively.
13 is a plan view of an orifice member formed by combining two such orifice forming cylinders, and FIG. 14 is a sectional view taken in FIG. 13. Moreover, FIG. 15 is a sectional view corresponding to FIG. 2, showing an example of a fluid-filled vibration damping support with a conventional rubber segment press-fit structure, and FIG. 16 is a cross-sectional view in FIG. 15. . 10: Inner cylinder metal fitting, 12: Outer cylinder metal fitting, 14: Rubber connection body, 16: Rubber ring, 18: Caulking metal fitting,
20: Mount body, 22: Partition bushing member, 24: Lid member, 26: First chamber, 28: Second chamber, 30: Incompressible fluid, 32: Stepped hole, 3
4: Small diameter part, 36: Rubber layer, 38: Seal part, 4
0: Large diameter portion, 42: Flange portion, 44: Mounting bracket portion, 48: Seal rubber, 50: Recess space, 52: Rubber member, 54: Inner sleeve, 5
6: Outer sleeve, 57: Hole, 58: Metal plate, 60: Orifice member, 62: Orifice forming cylinder, 68: Circumferential groove, 70: Orifice,
72: Cylindrical part.

Claims (1)

[Scope of Claims] 1. A first rubber member that connects an outer cylindrical metal fitting having a flange portion extending laterally at one end and an inner cylindrical metal fitting inserted and arranged concentrically therewith. A cylindrical second rubber elastic body is integrally vulcanized and bonded between the elastic body and an annular caulking fitting positioned at a predetermined distance on the outside in the axial direction of the flange portion, respectively, a mount body having a concave space formed around the inner cylindrical metal; the mount body is fitted into the inner cylindrical metal and the outer peripheral surface of the mount body; A partition bushing member including a rubber sleeve and an inner rigid sleeve fixed to the inner circumferential surface of the rubber sleeve, the partition bushing member being positioned so as to partition the recess space; A first fluid chamber press-fitted into the inner circumferential surface of the cylindrical metal fitting and surrounded by the partition bushing member, the inner cylindrical metal fitting, the outer cylindrical metal fitting, and the first rubber elastic body, and a state in which the first fluid chamber is opened at the caulked metal fitting part. an orifice member forming a circumferential orifice that communicates with a second fluid chamber formed between the partition bushing member, the inner cylindrical metal fitting, the outer cylindrical metal fitting and the second rubber elastic body; a lid that is caulked and fixed to the caulking fitting and covers an opening of the second fluid chamber when the first fluid chamber and the second fluid chamber are filled with a predetermined incompressible fluid; A fluid-filled vibration isolation assembly comprising: a member. 2. The vibration isolation assembly according to claim 1, wherein the orifice member is press-fitted and fixed to the outer peripheral surface of the partition bushing member via an outer rigid sleeve. 3. The orifice member has a cylindrical shape and has a circumferential groove on its outer circumferential surface, and the circumferential groove is covered with the inner circumferential surface of the outer cylindrical metal fitting, so that the first fluid 3. The vibration isolation assembly according to claim 2, further comprising an orifice that communicates the chamber with the second fluid chamber. 4. The orifice member is constructed by combining two cylindrical bodies, and the circumferential notches provided on the outer peripheral surfaces of each of the two cylindrical bodies form the circumferential groove by the combination thereof. A vibration isolation assembly according to claim 3. 5. The vibration isolation assembly according to claim 1, wherein the inner cylindrical metal fitting has a rubber layer on an outer circumferential surface into which the partition bushing member is fitted. 6. The inner cylindrical metal fitting has a stepped outer circumferential surface with the outer circumferential surface portion into which the partition bushing member is fitted as a small diameter portion, and the inner rigid sleeve of the partition bushing member is formed in an axial direction of the small diameter portion. An inner rigid sleeve of the partition bushing member, which has a length substantially equal to the length of the inner cylinder fitting and is fitted into the small diameter portion of the inner cylinder fitting, is brought into contact with a stepped portion of the outer circumferential surface of the inner cylinder fitting at one end thereof, and 6. The vibration isolating assembly according to claim 1, wherein the other end is restrained by the lid member to prevent movement in the axial direction. 7. The lid member has a cylindrical part that is fitted into the end of the inner cylindrical metal fitting, and when the cylindrical part is fitted, the peripheral edge of the lid member is fixed by caulking with the caulking metal fitting. Range 1st to 6th
The anti-vibration assembly described in any of paragraphs.