JPS61165040A - Fluid charged type vibration absorbing assembly - Google Patents

Abstract

PURPOSE:To enhance the damping characteristic of a fluid charged type vibration absorbing assembly and to facilitate the fabrication and installation of the same, by partitioning a recessed space in a mount body with the use of a partition bushing member into first and second fluid chambers, and by providing an orifice member outside of the partition bushing member. CONSTITUTION:A mount body 20 is composed of an inner cylinder hardware 10, an outer cylinder hardware 12, a rubber connecting member 14 vulcarnized and bonded between the above-mentioned both members, a rubber ring 16 vulcarnized and bonded to the outer cylinder hardware 12 and a caulking hardware 18 vulcarnized and bonded to the rubber ring 16. Further, a recessed space formed in the mount body 20 is partitioned with the use of a partition bushing member 26 into first and second chambers 26, 28 into which incompressible fluid 30 is charged. Further, an orifice member 60 composed of two orifice forming cylinders 62 in combination is press-fitted onto the outer peripheral surface of outer sleeve 22 of the partition bushing member 22, for communicating the first chamber 26 with the second chamber 28.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a fluid-filled vibration isolating assembly that can exhibit high damping characteristics that are particularly effective against vibration input.
The present invention relates to a fluid-filled vibration isolation assembly that is easy to assemble and manufacture, and has excellent sealing properties.

(Prior art) Conventionally, a rubber block has been interposed between two mounting brackets as a vibration-proof support for automobile body mounts, cab mounts, suspension rods, struts, bar cushions, etc. However, 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 is small, so the damping characteristics will be low, and therefore the It was not possible to sufficiently provide the grooves with the characteristics required of a vibration-proof support. 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 with a structure that utilizes the elasticity of rubber and the flow resistance of fluid was developed in Japanese Patent Laid-Open No.
This method has been proposed in Publication No. 5376 and the like. 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. This made it possible to achieve low dynamic spring characteristics and high damping characteristics, but due to its structure, the damping characteristics were limited to one direction, and vibrations in a direction perpendicular to that direction were limited. However, there was a major problem in that the damping effect was insufficient.

For this reason, the applicant of the present application first filed the patent application No. 57-14564.
No. 7 (Japanese Unexamined Patent Publication No. 59-37349), they revealed a fluid-filled elastic support structure that can exhibit such damping effects in two orthogonal directions. This anti-vibration support body proposed earlier has two types of fluid chambers and two types of rubber elastic bodies between the inner cylinder metal fitting and the outer cylinder metal fitting, and is designed to prevent vibrations in the axial direction. , the elasticity of one rubber elastic body and the fluid flow resistance between the fluid chambers exert an effective damping effect, while the elasticity of the other rubber elastic body An effective damping effect is achieved by the elasticity of the body 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, it is necessary to form two types of rubber elastic bodies and two types of fluid chambers between the inner and outer cylinder fittings, respectively. In the vibration isolating support having the structure exemplified in the above order, two divided bodies each having sleeves fixed to the inner and outer circumferential surfaces of a ring-shaped rubber are prepared, and these divided bodies are inserted into a predetermined inner cylinder. By press-fitting the metal fitting and the outer cylindrical metal fitting, a predetermined fluid chamber is defined between them while utilizing the elasticity of the rubber of the divided body. The press-fitting operation of the two divided bodies does not make it easy to assemble the vibration isolating support, and there are considerable problems inherent in the manufacturing process.

In addition, the surfaces of the two divided bodies that are press-fitted must be polished to prevent fluid from leaking from each fluid chamber, but such a polishing operation will damage the rubber applied to each divided body. It is a troublesome process along with the pre-compression operation to improve durability, and even if the surface of each divided body is precisely polished, there will be damage between the inner and outer cylinder fittings that are press-fitted. There is a risk that the fluid sealed in the fluid chamber may leak, and there is a problem that it is difficult to completely seal the fluid chamber.

Moreover, the orifice mechanism that connects the two fluid chambers in such a fluid-filled vibration isolation support generally has a
Since the orifice length is the axial length of the inner cylinder metal fitting that is provided on the inner cylinder metal fitting side and is provided with such an orifice mechanism, the orifice length is limited and a sufficient orifice length can be formed. There is also the inherent problem that the attenuation performance is restricted due to the lack of performance.

The present invention has been made against this background, and its purpose is to utilize the flow resistance of the fluid medium between the two chambers to exhibit high damping characteristics. In the vibration-proof support, it is possible to easily assemble and manufacture the support, to effectively prevent leakage of the fluid medium sealed in each chamber, and to effectively increase the length of the orifice. 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 includes an outer cylindrical fitting having a flange portion projecting to the side at one end, and an outer cylindrical fitting that is inserted and arranged concentrically therein. A first rubber elastic body is provided between the inner cylindrical metal fitting so as to connect them, and a cylindrical elastic body is provided between the flange portion and an annular caulking metal fitting located at a predetermined distance on the outside in the axial direction of the flange portion. (b) a mount body formed by integrally vulcanizing and adhering second rubber elastic bodies to form concave spaces serving as first and second fluid chambers around the inner cylinder fitting; and (b) the mount body. The rubber sleeve and the inner circumferential surface thereof are fitted into the outer circumferential surface of the inner cylindrical metal fitting of the main body and positioned so as to partition the recessed space between the inner cylindrical fitting and the outer cylindrical fitting. (C) a partition bushing member including an inner rigid sleeve fixed to the partition bushing member; and the first fluid chamber surrounded by the inner cylindrical metal fitting, the outer cylindrical metal fitting, and the first rubber elastic body; and (d) an orifice member forming a circumferential orifice that communicates with the second fluid chamber formed between the first fluid chamber and the second rubber elastic body; and a lid member which is caulked and fixed to the caulking fitting and covers the opening of the second fluid chamber when the second fluid chamber is filled with a predetermined incompressible fluid. A fluid-filled vibration isolation assembly was constructed.

- Furthermore, in the fluid-filled vibration damping assembly according to the present invention, it is desirable that the orifice member is press-fitted and fixed to the outer peripheral surface of the partition bushing member via a suitable outer rigid sleeve; In that case, 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 fitting, so that the first fluid Preferably, a circumferential orifice is formed that communicates the chamber with the second fluid chamber.

From a manufacturing standpoint, such an orifice member is generally constructed by combining two cylindrical bodies, and the circumferential notch provided on the outer peripheral surface of each of the two cylindrical bodies is The combination thereof forms the circumferential groove.

Further, the inner cylindrical metal fitting is configured to have a rubber layer of a predetermined thickness on the outer peripheral surface into which the partition bushing member is fitted, and the inner rigid sleeve of the partition bushing member is fitted onto this rubber layer. Furthermore, the orifice member provided on the outer periphery of the partition bushing member is press-fitted into the inner periphery of the outer cylinder. 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 fitted 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 length is approximately equal to the axial length of the
An inner rigid sleeve of the partition bushing member fitted into the small diameter portion of the inner cylindrical fitting has one end thereof abutted against a stepped portion of the outer circumferential surface of the inner cylindrical fitting, and has a second fluid chamber at the other end. By being restrained by the covering lid member, movement in the axial direction is prevented.

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 It is configured to be fixed by caulking with caulking metal fittings,
In addition, a partition bushing member configured to mainly receive vibrations applied from a direction perpendicular to its axis has at least one rigid plate, which extends for a predetermined length in the circumferential direction, within the rubber sleeve that constitutes the partition bushing member. buried,
The rigidity is varied in the circumferential direction.

(Operation/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 are provided. 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 to the axial direction.

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 its production is easy, as well as the first rubber elastic body that connects the inner and outer metal fittings is made of vulcanized adhesive. fastened to them,
Since the split body is not press-fitted as in the conventional structure described above, leakage of fluid between the first rubber elastic body and the inner and outer cylinder fittings can be completely prevented. Naturally, surface polishing operations to prevent 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 the orifice member that is press-fitted into the outer cylindrical metal fitting. Because of this, it is possible to have a sufficient orifice length, and it is also possible to form an orifice with a uniform arbitrary cross-sectional area, which effectively reduces the damping effect based on the flow resistance of the fluid flowing through the orifice. This made it possible to 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 isolation assembly according to the present invention.
The cab mount consists of an inner cylindrical metal fitting 10 through which a predetermined mounting bolt is inserted to attach the cab mount between the body and the frame, and an outer cylindrical metal fitting 12 arranged outside the inner cylinder metal fitting 10 at a predetermined distance apart. , those inner cylinder fittings 10
A rubber connecting body 14 as a first rubber elastic body vulcanized and bonded between the outer cylindrical metal fitting 12 and a cylinder constituting a second rubber elastic body similarly vulcanized and bonded to the outer cylindrical metal fitting 12. The main elements include a mount body 20 having a shaped rubber ring 16 and a caulking metal fitting 18 vulcanized and bonded to the rubber ring 16. A partition bushing member 22 fitted between the two, a lid member 24 that covers the inner recessed space formed by the inner cylinder fitting 10, the outer cylinder fitting 12, the rubber connecting body 14, and the rubber ring 16; It is substantially composed of a predetermined incompressible fluid 30 filled in a first chamber 26 and a second chamber 28, which are formed by partitioning the concave space by the partition bushing member 22.

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

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. For mounting, a bracket portion 44 is formed, and a bolt hole 46 for mounting is provided therethrough. In addition, in FIG. 1, the planar form of the bracket portion 44 before folding back is shown by a two-dot chain line in this installation.

There is a space between the inner tube fitting 10 and the outer tube fitting 12 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 40 of the inner tube fitting 10. , a predetermined rubber connecting body 14 is integrally vulcanized and bonded. In addition, the flange portion 4 of the outer cylinder fitting 12
A cylindrical rubber ring 16 of a predetermined thickness is concentrically fixed to the outer surface of the rubber ring 2 in the axial direction by an integral vulcanization adhesive method.
A ring-shaped caulking metal fitting 18 with a stepped surface is fixed 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 includes the inner cylinder fitting 10,
It can be suitably formed by integrally vulcanizing the rubber connecting body 14 and the rubber ring 16 in the presence of the outer cylinder fitting 12 and the caulking fitting 18, and by vulcanizing and adhering them and integrating them. In such a vulcanization molding operation, the rubber layer 36 and seal rubber 48 are also formed at the same time. The mount main body 20 having such a structure has an inner tube fitting 10, an outer tube fitting 12,
The rubber connecting body 14 and the rubber ring 16 connect the -th chamber 26.
Thus, a recessed space 50 that becomes the second chamber 28 is formed.

On the other hand, in the partition bushing member 22, as shown in FIGS. 4 and 5, metal sleeves, that is, an inner sleeve 54 and an outer sleeve 56, are vulcanized on the inner and outer peripheral surfaces of an annular rubber member 52, respectively. It is fixed by adhesive or the like to form an integral structure. And inner sleeve 5
As is clear from FIGS. 5 and 2, the length of the sleeve 4 in the axial direction is longer than that of the outer sleeve 56, and is approximately equal to the length of the small diameter portion 34 of the inner cylindrical fitting 10. Further, the rubber member 52 is provided with hollow portions (recesses) 57, 57 of a predetermined length at symmetrical positions on both end faces thereof, and is perpendicular to the direction in which the hollow portions 57, 57 are connected. Arc-shaped metal plates 58, 58 located symmetrically in the direction of Designed.

Further, the outer sleeve 5 of the partition bushing member 22
6 and 7, the orifice member 60 is press-fitted into the outer circumferential surface of 6 to form a predetermined circumferential orifice.
It is constructed by combining two orifice forming cylinders 62 as shown in the figure. That is, this orifice-forming cylinder 62 has a circumferential groove-forming notch 64 provided on its outer circumferential surface, and this groove-forming notch 64 extends in the circumferential direction of the remaining outer circumferential surface. A communication notch 66 formed in a portion allows communication in the axial direction. Then, such an orifice forming cylinder 6
2, as shown in FIGS. 8 and 9,
The orifice member 60 having a circumferential groove 68 formed on its outer circumferential surface is constructed by symmetrically combining the groove-forming notches 64 so that they are aligned with each other, and the circumferential groove 68 is connected to the communicating notch 66. 66 allows for communication in the axial direction.

That is, the two orifice forming cylinders 62,
The orifice member 60 configured by combining 62 is
It is press-fitted and fixed to the outer sleeve 56 of the partition bushing member 22 described above, and furthermore, it is fixed to the outer sleeve 56 of the partition bushing member 22.
The orifice member 60 is press-fitted into the outer cylindrical fitting 12 of No. 0, and the circumferential groove 68 of the orifice member 60 is covered with the inner circumferential surface of the outer cylindrical fitting 12, thereby forming an orifice 70. are communicated with the first chamber 26 and the second chamber 28 through communication notches 66, 66 formed at both ends in the axial direction, respectively, and these two chambers 26, 28 are communicated as a whole. It is designed to be obtained.

In addition, 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,
An orifice member 6 is formed by combining the two orifice forming cylinders 62 and 62 on the outer peripheral surface of the outer sleeve 56 of the partition bushing member 22 shown in FIGS. 4 and 5.
0 is press-fitted and fixed, and the mount body 20 shown in FIG. , 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 cylindrical fitting 10, while the outer cylindrical fitting 12
The orifice member 60 is press-fitted into the inner surface of. By this normal operation, a recessed space 5 is formed around the inner cylinder fitting 10 of the mount body 20.
0 is divided into two, and a chamber 26 surrounded by the partition bushing member 22, the inner cylindrical fitting 10, the outer cylindrical fitting 12, and the rubber connecting body 14 is formed in the circumferential direction. Also,
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 chamber 26 thus formed is filled with the incompressible fluid 30.

Next, the partition bushing member 22 is press-fitted into the mount main body 20 until one end face of the inner sleeve 54 of the partition bushing member 22 matches the end face of the inner cylinder fitting 10. After the other end surface of the inner sleeve 54 is pressed against the stepped portion of the outer peripheral surface of the inner cylindrical fitting 10 and its position is fixed, the cylindrical portion 72 provided on the disc-shaped lid member 24 is pressed. The assembly operation is completed by fitting the inner tube fitting 10 into the stepped hole 32 formed inside the end thereof and fixing the peripheral edge thereof with the caulking fitting 18, and the desired cab mount is completed. is formed. That is, the caulking fitting 1 of the second chamber 28 formed between the partition bushing member 22, the inner cylindrical fitting 10, the outer cylindrical fitting 12, and the rubber ring 16
The opening at part 8 is covered with the lid member 24, which is firmly abutted and pressed against the end surface of the inner cylinder fitting 10 (the sealing part 38 part) and the caulking fitting 18 (the sealing rubber part 48), This second chamber 28 is made liquid-tight.

Moreover, the -th chamber 26 and the second chamber 2 formed in this way
8 refers to a circumferential groove 68 formed on the outer peripheral surface by the orifice forming cylinders 62 and 62 that constitute the orifice member 60.
The orifice 70 is formed by being covered with the inner circumferential surface of the outer cylindrical fitting 12.
are located at both ends in the axial direction.
．． The chambers are connected to each other at 66, thereby allowing them to communicate with each other. In short, the first chamber 26 and the second chamber 28 are communicated with each other by the orifice 70 extending in the circumferential direction.

Therefore, when vibration is applied as a load in the axial direction of the cab mount having such a configuration, the incompressible fluid 3
0 moves from the side of the first chamber 26 to the side of the second chamber 28, or in the opposite direction, through the orifice 70 and the communicating notches 66, 66 at both ends thereof. - A predetermined flow resistance is developed in the incompressible fluid 30 flowing between the chamber 26 and the second chamber 28, so that by this flow resistance and with it, the rubber ring 16
With the addition of the elastic action, 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 partition bushing member 22 interposed between the inner cylindrical metal fitting 10 and the outer cylindrical metal fitting 12, and more specifically, the cylindrical shape The vibration is received by the rubber member 52 and is damped, but other rubber members, in other words, the rubber connecting body 14 and the rubber ring 16 also provide 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, a rubber connecting body 14 serving as a first rubber elastic body is connected between the inner cylindrical metal fitting 10 and the outer cylindrical metal fitting 12. The mount main body 20 has a structure in which the rubber ring 16, which is a second rubber elastic body, is vulcanized and bonded to the flange portion 42 of the outer cylinder fitting 12.
Two fluid chambers, that is, a first chamber 26 and a second chamber 28, are formed by simply press-fitting a partition bushing member 22 having an orifice member 60 on its outer periphery. Therefore, the assembly work could be significantly simplified and facilitated, and the manufacturing process could also be carried out advantageously. Moreover, unlike the conventional case where a plurality of liquid chamber forming bodies are sequentially engineered to form a plurality of liquid chambers, the rubber connecting body 1 forming the first chamber 26 is
4 is vulcanized and bonded between the outer surface of the inner cylindrical fitting 10 and the inner surface of the outer cylindrical fitting 12, so there is no possibility that the incompressible fluid 30 leaks to the outside through the gap between them. Therefore, the problem of fluid leakage, which is a problem in conventional press-fit structures, can be completely solved.

In addition, since the rubber connecting body 14 for forming the first chamber 26 is not interposed between the inner cylindrical metal fitting 1o and the outer cylindrical metal fitting 12 by a press-fit structure, the sealing effect is enhanced. Surface polishing operations are also completely unnecessary,
Furthermore, in the combination of the pre-compression operation and the surface polishing operation for such rubber connectors, there is no longer any need to strictly control the extent of these individual processes.

Moreover, the orifice 70 that communicates the first chamber 26 and the second chamber 28 is provided along the inner surface of the outer cylindrical fitting 12 in the circumferential direction thereof.
Unlike the case where it is provided in the axial direction on the 0 side, its length can be effectively increased, and its cross-sectional area is also smaller than that of the groove forming notch 6.
4, it can be set arbitrarily, and it can be made uniform, making it possible to exhibit an even more effective damping effect.

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. However, it goes without saying that various changes, modifications, improvements, etc. can be made to the present invention, and such embodiments fall within the scope of the present invention.

For example, in the previous example, the orifice member 60 was configured such that the length of the orifice 70 was at most half the circumference of the orifice member 60, but the orifice forming cylinder as shown in FIGS. By combining two of the bodies 74 to form the orifice member 60, the orifice 70 can be formed 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, it has a groove forming notch 64 and a communicating notch 66. A discontinuous large diameter portion (uncut portion) 76 is formed. Then, the large diameter portions 76 are positioned in correspondence with each other, and the two orifice forming cylinders 74.
74 and by locating the communicating notches 66 on both sides of the large diameter portion 76, the circumferential groove 68 is formed over substantially the entire circumference, and this is formed on the inner surface of the outer cylinder fitting 12. As a result, an orifice 70 extending substantially all the way around is formed.

Further, as shown in the above example, the orifice member 60 is press-fitted into the partition bushing member 22 through the outer sleeve 56, which facilitates manufacturing and assembling work. Although this is preferable in this respect, 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 the outer circumferential surface of the outer sleeve 56. .

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

[Brief explanation of the drawing]

FIG. 1 is a plan view of a cab mount according to an example of a fluid-filled vibration damping assembly according to the present invention, and FIG. 2 is a sectional view taken along the line 1--2 in FIG. Figures 3 to 9 show the components of the cab mount in Figures 1 and 2, respectively, with Figure 3 being a sectional view of the mount body, and Figure 4 showing the partition bushing member. Floor plan, 5th
The figure is a cross-sectional view taken along line V-V in FIG. 4, FIG. 6 is a plan view of the orifice forming cylinder shown in FIG. 5, and FIG.
-■ sectional view, FIG. 8 is a plan view of an orifice member formed by combining two orifice forming cylinders, and FIG. 9 is a sectional view taken along line IX-IX in FIG. 10 to 14 show other examples of the orifice-forming cylinder and orifice member used in the present invention, and FIG. 10 is a plan view of the orifice-forming cylinder, and FIGS. Figure 12 shows shoulder-X 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 cross-sectional view taken along line XIV-XI in FIG. 13. It is a sectional view of XIV. 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: Non-compressible Sexual fluid 32: Stepped hole 34: Small diameter portion 36: Rubber layer 38: Seal portion 40: Large diameter portion 42: Flange portion 44; Mounted on Brakent portion 48: Seal rubber 50: Recess space 52: Rubber member 54: Inner sleeve 56 : Outer sleeve 57: Sink portion 58: Metal plate 60 Niorifice member 62 Niorifice forming cylinder 68: Circumferential groove 70 Niorifice 72: Cylindrical portion

Claims (7)

[Claims] (1) A first rubber elastic body is inserted between an outer cylindrical metal fitting having a flange portion extending laterally at one end and an inner cylindrical metal fitting inserted and arranged concentrically thereto, so as to connect them; Further, a cylindrical second rubber elastic body is integrally vulcanized and bonded between the flange portion and an annular caulking metal fitting located at a predetermined distance on the outside in the axial direction, and the inner cylindrical metal fitting is bonded by vulcanization. a mount body formed with concave spaces forming first and second fluid chambers around the mount body; and a mount body that is fitted onto the outer circumferential surface of the inner cylinder metal fitting of the mount body, and is fitted into the outer circumferential surface of the inner cylinder metal fitting and the inner cylinder and the outer cylinder are connected to each other. a partition bushing member including at least a rubber sleeve and an inner rigid sleeve fixed to the inner circumferential surface thereof, the partition bushing member being positioned so as to partition the recessed space from the metal fitting; the first fluid chamber is press-fitted into the inner circumferential 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 direction that communicates with the 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 in a state where it is opened at the caulked metal fitting portion. an orifice member forming an orifice of the second fluid chamber, the second fluid chamber being caulked and fixed to the caulking fitting in a state in which the first fluid chamber and the second fluid chamber are filled with a predetermined incompressible fluid; A fluid-filled vibration damping assembly comprising: a lid member that covers an opening of a fluid chamber. (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 a suitable 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 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 configured 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 isolating assembly according to claim 1, wherein the inner cylindrical metal fitting has a rubber layer of a predetermined thickness on an outer peripheral 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, while the inner rigid sleeve of the partition bushing member has a stepped outer circumferential surface that has a small diameter portion. The inner rigid sleeve of the partition bushing member, which has a length substantially equal to the axial length and is fitted into the small diameter portion of the inner cylindrical fitting, is brought into contact with a stepped portion on the outer circumferential surface of the inner cylindrical fitting at one end thereof. 6. The vibration isolating assembly according to claim 1, wherein the vibration isolating assembly is configured such that the other end thereof is restrained by the lid member to prevent movement in the axial direction. (7) A patent in which 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 crimped and fixed by the crimped metal fitting. A vibration isolation assembly according to any one of claims 1 to 6.