JPH06307491A - Liquid enclosed type vibration proofing mount - Google Patents

Abstract

PURPOSE:To partition the inside into a pressure receiving chamber and a balancing chamber, and improve the manufacturing and assembly performance of a partition member consisting an orifice passage and a liquid pressure absorbing mechanism. CONSTITUTION:First plate-like metal-fittings 42 made up of a bottomed cylindrical part 48 and a flange part 50, and second plate-like metal-fittings 44 made up of a bottomed cylindrical part 56 and a flange part 58 having the diameters larger than those of the bottomed cylindrical part 48 of the first plate-like metal-fittings 42, are overlapped on each other with their openings faced to each other. Then, a rubber membrane 46 is inserted into the bottomed cylindrical part 48 of the first plate-like metal-fittings 42 to position and hold the outer peripheral surface, and a ring-like projection 64 formed on the outer peripheral edge part of the rubber membrane 46 is caught and held under pressure between the plate-like metal-fittings 42, 44 to form an orifice passage 70 outside the ring-like projection 64 of the rubber membrane 46, in the bottomed cylindrical part 56 of the second plate-like metal-fittings 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid-filled type vibration damping device in which an orifice passage is formed in a partition member for partitioning a pressure receiving chamber and an equilibrium chamber, and a vibration damping effect is exhibited based on a flow action of a fluid flowing through the orifice passage. The present invention relates to a mount, and more particularly to a fluid filled type vibration damping mount which is excellent in manufacturability and assembling of a partition member.

[0002]

2. Description of the Related Art Conventionally, as a type of mount device that is interposed between members constituting a vibration transmission system such as an automobile engine mount or a body mount to couple them in a vibration-proof manner,
There is known a structure in which a first support fitting and a second support fitting are connected by a rubber elastic body interposed between them. Further, in recent years, in order to obtain a higher vibration-proof effect, on both sides of the partition member supported by the second support fitting,
There has been proposed a fluid-filled type vibration-damping mount that forms a balance chamber with a pressure-receiving chamber in which a predetermined incompressible fluid is sealed, and that is provided with an orifice passage that connects the pressure-receiving chamber and the balance chamber to each other. Further, in such a fluid filled type vibration isolation mount, in order to improve the vibration isolation characteristics in the high frequency range, a rubber film is displaceably disposed between the pressure receiving chamber and the equilibrium chamber, and the displacement of the rubber film is A hydraulic pressure absorption mechanism adapted to absorb a small internal pressure fluctuation in the pressure receiving chamber is preferably adopted.

Specifically, in such a fluid filled type vibration damping mount, generally, as disclosed in Japanese Utility Model Laid-Open No. 63-66643, there are two partition members for partitioning the pressure receiving chamber and the equilibrium chamber. It has a laminated structure of plate-shaped bodies (generally press-molded plate-shaped metal fittings), and an annular orifice passage is formed in the outer peripheral portion between both plate-shaped metal fittings, while the center between both plate-shaped metal fittings is formed. A rubber film is displaceably disposed in the portion, and both sides of the rubber film are communicated with the pressure receiving chamber and the equilibrium chamber to form a hydraulic pressure absorbing mechanism.

However, in order to adopt such a fluid pressure absorbing mechanism, one plate-shaped metal fitting is formed into an annular recess by press working or the like, and is brought into contact with the other plate-shaped metal fitting so that it is formed on the outer peripheral portion. It is necessary to partition the formed orifice passage from the rubber film forming portion formed in the central portion. If there is insufficient partitioning between the orifice passage and the rubber film, the orifice passage may be short-circuited, fluid may leak, etc., and a sufficient vibration damping effect based on the fluid flow action may be achieved. You will not be able to get it.

Therefore, in the past, plate-shaped metal fittings were required to have high dimensional accuracy, which was difficult to manufacture, and the mount vibration-damping characteristics were likely to vary due to short-circuiting of the orifice passages and the desired vibration-damping effect was stabilized. There was a problem that it was difficult to obtain.

In Japanese Patent Laid-Open No. 60-252834, two plate-shaped metal fittings having a disk shape are superposed on each other with a rubber film sandwiched therebetween and fitted into a rubber elastic body, whereby the plate-shaped metal fittings are fitted. An anti-vibration mount has been proposed which includes a partition member having a structure in which the rubber film is positioned by a rubber elastic body and an annular orifice passage is formed between the outer peripheral surface of the rubber film and the rubber elastic body.

However, in such an antivibration mount, since it is necessary to position the plate-shaped metal member and the rubber film constituting the partition member with respect to the rubber elastic body at the time of assembly to the rubber elastic body, the partition member There is a problem that the assembling work is troublesome, the positioning accuracy is poor, and the shape of the orifice passage may change due to the deformation of the rubber elastic body or the rubber film, which makes it difficult to obtain a stable vibration damping effect. .

Further, in Japanese Unexamined Patent Publication No. Sho 62-184254, a rubber film is sandwiched between two plate-like metal fittings each having a substantially disc shape so that the rubber film is clamped and held to form the rubber film. An anti-vibration mount has been proposed that includes a partition member having a structure in which an orifice passage is formed by an annular groove.

However, in such an anti-vibration mount, the rubber film is deformed by the clamping pressure exerted on the rubber film by the two plate-shaped metal fittings during assembly, and the shape of the orifice passage formed in the rubber film changes. Since it is easy, there is a problem that it is difficult to obtain the intended vibration damping effect.

Furthermore, in Japanese Patent Laid-Open No. 63-167141, an annular constricted portion is provided on the outer peripheral portion of a rubber film, and two plate-shaped metal fittings are provided with an annular engaging portion for engaging with the constricted portion. An anti-vibration mount has been proposed, which is provided with a partition member having a structure in which a rubber film is held in a central portion by projecting and an orifice passage is formed on the outer peripheral side of the rubber film.

However, in such an antivibration mount, since the rubber film and each plate-shaped metal fitting have a complicated shape, it is difficult to manufacture and the positioning of each of these members at the time of assembly is troublesome. There was a problem.

[0012]

The present invention has been made in view of the circumstances as described above, and a problem to be solved by the present invention is that an arrangement portion of a rubber film that constitutes an orifice passage and a hydraulic pressure absorbing mechanism. Another object of the present invention is to provide a fluid-filled type vibration damping mount provided with a partitioning member having a novel structure, which is partitioned with sufficient liquid tightness.

Another object of the present invention is to provide a fluid-filled type vibration-proof mount including a partition member which is composed of a plate-shaped member having a simple shape and a rubber film and is easy to manufacture.

Furthermore, the present invention also provides a fluid-filled type vibration-proof mount comprising a partitioning member capable of easily assembling a rubber film on a plate-like member with excellent positioning. To aim.

Further, according to the present invention, a fluid sealing member is provided which is provided with a partition member which can prevent the change of the shape of the orifice passage due to the deformation of the rubber film or the like as much as possible, and can stably obtain the intended vibration damping effect. It is also an object to provide an anti-vibration mount.

[0016]

SOLUTION: In order to solve these problems,
A feature of the present invention is that the first support fitting and the second support fitting are connected by a rubber elastic body, and a part of the wall portion is provided on both sides of the partition member supported by the second support fitting. And a pressure receiving chamber constituted by the rubber elastic body and a balance chamber constituted by a part of the wall portion formed by a flexible film, and a predetermined incompressible fluid is enclosed in the pressure receiving chamber and the balance chamber. On the other hand, the partition member has a superposed structure of a first plate-shaped body and a second plate-shaped body, and an orifice for communicating the pressure receiving chamber and the equilibrium chamber with each other at an outer peripheral portion between the both plate-shaped bodies. A fluid-filled type vibration-proof mount in which a passage is provided and a rubber film is displaceably arranged in the central portion between the plate-like bodies, and both sides of the rubber film are connected to the pressure receiving chamber and the equilibrium chamber, respectively. , The first plate-shaped body and the second plate-shaped body, respectively with a bottomed cylindrical portion While a hat shape consisting flange portion, superimposed by facing the opening sides,
The bottomed cylindrical portion of the second plate-shaped body has a larger diameter than the bottomed cylindrical portion of the first plate-shaped body, and the rubber film is formed on the bottomed cylindrical portion of the first plate-shaped body. By positioning and holding the outer peripheral surface by inserting, by providing an annular protrusion on the outer peripheral edge portion of the rubber film to clamp the annular protrusion between the first and second plate-like bodies, The rubber film is arranged between the first and second plate-like bodies, and the orifice passage is formed on the outer peripheral side of the annular protrusion of the rubber film in the bottomed cylindrical portion of the second plate-like body. There is something I did.

[0017]

In the fluid-filled type vibration damping mount having the structure according to the present invention, the annular protrusion formed on the outer peripheral edge of the rubber film is sandwiched between the first and second plate-like members. By being pressed, the annular projection functions as a sealing material, and the orifice passage and the portion where the rubber film constituting the fluid pressure absorbing mechanism is disposed are partitioned with sufficient liquid tightness. It is possible to prevent a short circuit and the like and to exhibit a stable vibration damping effect.

Further, in such a fluid filled type vibration damping mount, both the first and second plate-like members are formed in a simple hat shape, and the orifice passage is sealed without high dimensional accuracy. Since the elasticity is ensured by the annular protrusion of the rubber film, the partition member and thus the mount can be easily manufactured.

Furthermore, in such a fluid filled type vibration damping mount, by only inserting the rubber film into the bottomed cylindrical portion of the first plate-like member, the inner wall surface of the bottomed cylindrical portion is formed. Since the outer peripheral surface of the rubber film is held and positioned over the entire circumference, the rubber film can be easily assembled and excellent positioning performance can be exhibited.

Further, in such a fluid-filled mount, between the flange portion of the first plate-shaped body and the outer peripheral portion of the bottomed cylindrical portion of the second plate-shaped body, the first and second Since the orifice passage can be formed by the plate-like body, it is possible to prevent the shape change of the orifice passage when the rubber film is deformed, and to obtain the desired vibration damping effect in a stable manner. .

[0021]

EXAMPLES Examples of the present invention will now be described in detail with reference to the drawings in order to clarify the present invention more specifically.

First, FIG. 1 shows an automobile engine mount 10 as an embodiment of the present invention. The engine mount 10 has a structure in which a first support fitting 12 and a second support fitting 14 are connected by a rubber elastic body 16. Then, one of the first support fitting 12 and the second support fitting 14 is attached to the body side, and the other is attached to the power unit side, so that the power unit is elastically supported by the body. Further, in such a mounted state, the main vibration to be isolated from vibration is input to the engine mount 10 in a direction in which the first support fitting 12 and the second support fitting 14 are opposed to each other (vertical direction in FIG. 1). The Rukoto.

More specifically, the first support fitting 12 has a substantially thick disk shape. Further, a bottomed cylindrical retainer 20 having a cylindrical wall portion that expands in a tapered shape is fixed to the lower surface of the first support fitting 12 at the opening. Further, a mounting bolt 18 is fixed to the central portion of the first support fitting 12 so as to project outward.

On the other hand, the second support fitting 14 is composed of a bottom fitting 22 having a substantially bottomed cylindrical shape and a tubular fitting 24 having a substantially cylindrical shape. The bottom metal member 22 has an outer flange portion 26 at the peripheral edge portion of the opening, and two mounting bolts 28, 28 are fixed to the bottom wall portion thereof so as to project outward. Further, the tubular metal member 24 has a tapered tubular wall portion on the one axial side opening side, and has a caulking portion 30 on the other axial side opening portion. And
The bottom metal fitting 22 and the cylinder metal fitting 24 are axially overlapped with each other, and the caulking portion 30 of the cylinder metal fitting 24 is caulked and fixed to the outer flange portion 26 of the bottom metal fitting 22 to form the second support metal fitting 14. .

Further, the first support fitting 12 and the second support fitting 14 are arranged so as to face each other at a predetermined distance on substantially the same axis, and the rubber elastic body 16 is interposed between them. There is. The rubber elastic body 16 has a substantially truncated cone shape as a whole, and its small-diameter side end surface is fixed to the first support fitting 12, while the large-diameter side outer peripheral surface is the second support fitting 1.
It is fixed to a tubular metal member 24 that constitutes No. 4. As a result, the rubber elastic body 16 elastically connects the first support fitting 12 and the second support fitting 14 and closes the opening of the second support fitting 14 in a fluid-tight manner.

Furthermore, inside the second support fitting 14,
A diaphragm 32 as a flexible film is housed and arranged. The diaphragm 32 is made of thin rubber, and an annular mounting member 34 is fixed to the outer peripheral edge of the diaphragm 32. In the diaphragm 32, the outer peripheral edge portion to which the mounting fitting 34 is fixed is attached to the bottom fitting 22 and the tubular fitting 24.
It is assembled to the second support fitting 14 by being sandwiched by the caulking portion. As a result, the inside of the second support fitting 14 is moved to the tubular fitting 2 by the diaphragm 32.
It is fluid-tightly divided into the 4 side and the bottom metal fitting 22 side.

Further, inside the second support fitting 14, a partition member 36 is accommodated and arranged at a position closer to the tubular fitting 24 than the diaphragm 32. The partition member 36 has a substantially disk shape as a whole, and its outer peripheral edge portion is superposed on the outer peripheral edge portion of the diaphragm 32.
Along with 2, the bottom metal fitting 22 and the tubular metal fitting 24 are clamped by the caulked portions.

As a result, the partition member 36 is fixedly attached to the second support fitting 14, and the rubber elastic body 16 and the diaphragm 3 are fixed by the partition member 36.
The closed chamber formed between the two is fluid-tightly divided into the rubber elastic body 16 side and the diaphragm 32 side.

Further, a predetermined incompressible fluid such as water, alkylene glycol, polyalkylene glycol, silicone oil, etc. is enclosed in the closed chamber divided into two by the partition member 36. It should be noted that the sealing of the fluid in the closed chamber can be advantageously performed by, for example, assembling the partition member 36 and the diaphragm 32 in the fluid.

As a result, on one side (on the side of the first support metal fitting 12) located with the partition member 36 in between, a part of the wall portion is constituted by the rubber elastic body 16, and the rubber elastic body is input at the time of vibration input. Pressure receiving chamber 3 in which internal pressure fluctuation is caused based on deformation of 16
8 is formed. Further, on the other side of the partition member 36, the wall portion is partially configured by the diaphragm 32, and the equilibrium chamber 40 is formed in which the volume change is allowed based on the deformation of the diaphragm 32. There is.

In the partition member 36 for partitioning the pressure receiving chamber 38 and the equilibrium chamber 40, the first plate-shaped metal fitting 42 and the second plate-shaped metal fitting 44 formed by press molding or the like sandwich the rubber film 46. The structure is made by overlapping.

As shown in FIGS. 2 and 3, the first plate-shaped metal fitting 42 has a hat shape composed of a shallow bottomed cylindrical portion 48 and a flange portion 50. Further, four through holes 52 are formed in the bottom wall portion of the bottomed cylindrical portion 48. Further, the flange portion 50 has a bottomed cylindrical portion 48.
One communication hole 54 is formed so as to straddle the cylindrical wall portion.

On the other hand, as shown in FIGS. 4 and 5, the second plate-shaped metal fitting 44 has a shallow bottomed cylindrical portion 56 similar to the first plate-shaped metal fitting 42. It has a hat shape including the flange portion 58. Here, the bottomed cylindrical portion 56 of the second plate-shaped metal fitting 44 is connected to the first plate-shaped metal fitting 42.
The inner diameter is set to be larger than that of the bottomed cylindrical portion 48. Furthermore, in the central portion of the bottom wall of the bottomed cylindrical portion 56,
Four communication holes 60 are formed, and one communication hole 62 is formed on the outer peripheral edge of the bottom wall.

The outer diameter of the bottomed cylindrical portion 56 of the second plate-shaped metal fitting 44 is set to be substantially the same as or slightly smaller than the inner diameter of the pressure receiving chamber 38 formed in the cylindrical metal fitting 24. There is. When the partition member 36 is assembled, the bottomed cylindrical portion 56 of the second plate-shaped metal fitting 44 is fitted into the tubular metal fitting 24, so that the second plate-shaped metal fitting 44 is attached to the tubular metal fitting 2.
4 is set to be positioned.

Thus, the first plate-shaped metal fitting 42 and the second plate-shaped metal fitting 44 are axially overlapped so that the openings of the bottomed cylindrical portions 48 and 56 face each other. As a result, a substantially disk-shaped cavity is formed between the bottomed cylindrical portion 48 of the first plate-shaped metal fitting 42 and the bottomed cylindrical portion 56 of the second plate-shaped metal fitting 44. A rubber film 46 is accommodated and arranged in the place.

As shown in FIGS. 6 and 7, the rubber film 46 has a substantially disc shape as a whole,
The outer diameter thereof is substantially the same as the inner diameter of the bottomed cylindrical portion 48 of the first plate-shaped metal fitting 42. Further, on the outer peripheral edge portion of the rubber film 46, an annular protrusion 64 protruding at both sides in the axial direction at a predetermined height.
Are continuously formed in the circumferential direction. This annular protrusion 6
4 indicates that the total axial height is substantially the same as or slightly smaller than the inner dimension between the bottom wall portions of the bottomed cylindrical portions 48 and 56 of the first and second plate-shaped metal fittings 42 and 44 that are overlapped with each other. Is set to a large value.

An annular seal lip 66 is formed on each of both axial end faces of the annular protrusion 64. Further, contact protrusions 68 are formed at the center of the rubber film 46 and at four locations around the center at a height lower than that of the annular protrusion 64.

The rubber film 46 is inserted into the bottomed cylindrical portion 48 of the first plate-shaped metal fitting 42, and the outer peripheral surface thereof abuts on the inner peripheral surface of the bottomed cylindrical portion 48. , Is positioned and held. Further, the annular protrusion 6 of the rubber film 46
4, both end surfaces in the axial direction contact the bottom wall portion of the bottomed cylindrical portion 48 of the first plate-shaped metal fitting 42 and the bottom wall portion of the bottomed cylindrical portion 56 of the second plate-shaped metal fitting 44. They are brought into contact with each other, and are clamped and gripped between the bottom wall portions in the axial direction.

As a result, the bottomed cylindrical portion 48 of the first plate-shaped metal fitting 42 and the bottomed cylindrical portion 56 of the second plate-shaped metal fitting 44.
The space formed between the two is fluid-tightly partitioned by the annular protrusion 64 of the rubber film 46 into a portion on the inner peripheral side and a portion on the outer peripheral side of the annular protrusion 64. That is, the second plate-shaped metal fitting 44
The bottomed cylindrical portion 56 has a diameter larger than that of the bottomed cylindrical portion 48 of the first plate-shaped metal fitting 42.
On the outer peripheral side of the annular protrusion 64 of 6, the annular cavity extending in the circumferential direction is the bottomed cylindrical portion 56 of the second plate-shaped metal fitting 44.
It is formed inside.

Since the annular space is communicated with the equilibrium chamber 40 and the pressure receiving chamber 38 through the communication holes 54, 62 provided in the first and second plate-shaped metal fittings 42, 44, An orifice passage 70 that connects the pressure receiving chamber 38 and the equilibrium chamber 40 to each other is formed.

In the present embodiment, the first plate-shaped metal fitting 42 and the second plate-shaped metal fitting 44 are circumferentially positioned so that the communication hole 54 and the communication hole 62 are located radially opposite each other. As a result, two orifice passages 70, 70 each extending in the circumferential direction with a length of about ½ circumference are formed. Further, in this embodiment, based on the resonance action of the fluid flowing through the orifice passage 70,
The cross-sectional area and length of each orifice passage 70 are set so that the damping effect is exerted when a low-frequency vibration such as a shake is input.

On the other hand, between the bottomed cylindrical portion 48 of the first plate-shaped metal fitting 42 and the bottomed cylindrical portion 56 of the second plate-shaped metal fitting 44, inside the annular protrusion 64 of the rubber film 46. The circular cavity formed on the circumferential side is fluid-tightly divided into a first plate-shaped metal fitting 42 side and a second plate-shaped metal fitting 44 side by a rubber film 46. Furthermore, the vacant space on the side of the first plate-shaped metal fitting 42 and the vacant space on the side of the second plate-shaped metal fitting 44 are the first and second plate-shaped metal fittings 4
The equilibrium chamber 40 and the pressure receiving chamber 38 are communicated with each other through the through holes 52 and 60 provided in the Nos. 2 and 44, respectively.

As a result, the internal pressures of the pressure receiving chamber 38 and the equilibrium chamber 40 are exerted on both sides of the rubber film 46, and both chambers 38,
The rubber film 46 is deformed on the basis of the difference in internal pressure between the pressure receiving chambers 40, thereby allowing a small amount of fluid flow between the pressure receiving chamber 38 and the equilibrium chamber 40 to absorb the pressure variation in the pressure receiving chamber 38. The mechanism is configured.

In the rubber film 46, the abutting projections 68 have the first and second plate-like metal fittings 42 and 44, respectively.
Are positioned with respect to the first and second plate-shaped metal fittings 42, 44 so as to face the portions where the through holes 52, 60 are not formed. Then, by the contact projection 68 contacting the first and second plate-shaped metal fittings 42, 44,
The displacement amount of the rubber film 46, and consequently the flow amount of the fluid that is caused to flow based on the deformation of the rubber film 46, is regulated.

Further, in this embodiment, based on the flow action of the fluid that is caused to flow by the deformation of the rubber film 46,
The sizes of the through holes 52 and 60 are set so that the low dynamic spring effect is exerted when high-frequency vibration such as muffled sound is input.

Therefore, in the engine mount 10 having the above-described structure, the annular projection 64 formed on the outer peripheral edge of the rubber film 46 is pinched between the first and second plate-shaped metal fittings. As a result, the annular protrusion 64 functions as a seal material that partitions the orifice passage 70 and the rubber film 46.

Therefore, the orifice passage 70 and the rubber film 46 are
Since it is partitioned with a sufficient liquid-tightness, the orifice passage 70 can be prevented from short-circuiting and the desired vibration damping effect can be effectively and stably exhibited.

In addition, in the engine mount 10, it is not necessary to project the partition wall that separates the orifice passage 70 and the portion where the rubber film 46 is provided, from the first and second plate-shaped metal fittings 42 and 44. Therefore, the first and second plate-shaped metal fittings 42, 44 are both formed in a simple hat shape.

Therefore, the first and second plate-like metal fittings 42, 4
4 is easy to manufacture, and high dimensional accuracy is not required, and the manufacturability of the mount can be dramatically improved.

Furthermore, in the engine mount 10, the bottomed cylindrical portion 48 is simply inserted into the bottomed cylindrical portion 48 of the first plate-shaped metal fitting 42.
The outer peripheral surface of the rubber film 46 is held and positioned over the entire circumference by the inner peripheral surface of the cylindrical wall portion.

Therefore, the rubber film 46 can be easily assembled to the first and second plate-shaped metal fittings 42 and 44 with excellent positioning property, thereby further improving mount manufacturability. Stabilization of performance can be achieved.

Further, the engine mount 10 of this embodiment.
In the above, since the orifice passage 70 is formed between the flange portion 50 of the first plate-shaped metal fitting 42 and the bottomed cylindrical portion 56 of the second plate-shaped metal fitting 44, the orifice passage 70 is formed.
Can be advantageously prevented.

Therefore, the shape of the orifice passage 70 can be advantageously maintained, and the desired vibration damping effect based on the flow action of the fluid that is made to flow through the orifice passage 70 can be obtained.
It can be exhibited advantageously and stably.

Further, in the engine mount 10 of this embodiment, since the bottomed cylindrical portion 56 of the second plate-shaped metal fitting 44 is fitted in the tubular metal fitting 24,
At the time of assembling, the partition member 36 can be easily positioned and set on the second support fitting 14, and the assembling workability can be improved, and the automatic assembling and setting can be easily realized. .

Furthermore, the engine mount 1 of the present embodiment.
At 0, two orifice passages 70, 70 are formed between the pressure receiving chamber 38 and the equilibrium chamber 40 so as to extend between the communication holes 54, 62 toward both sides in the circumferential direction. It is possible to secure a large area, and it is possible to more advantageously obtain the vibration damping effect based on the fluid flow action.

Although the embodiments of the present invention have been described above in detail, these are literal examples and the present invention should not be construed as being limited to such specific examples.

For example, the first plate-shaped metal fitting 42 is used as the pressure receiving chamber 38.
Side, the partition member 36 is arranged so that the second plate-shaped metal fitting 44 is located on the equilibrium chamber 40 side, and the equilibrium is better than the bottomed cylindrical portion of the plate-shaped metal fitting located on the pressure receiving chamber 38 side. The bottomed cylindrical portion of the plate-shaped metal fitting located on the chamber 40 side may have a larger diameter.

Further, in the above-described embodiment, the two orifice passages 70, 70 extending in the circumferential direction at the outer peripheral edge of the partition member 36 with a length of approximately half the circumference are formed, but in the circumferential direction, the half or less of the circumference. Alternatively, it is possible to employ a single orifice passage extending over a half circumference or more.

The orifice passage extending along the outer peripheral edge portion of the partition member 36 in the circumferential direction by a length of a little less than one round, for example, projects radially outward from the outer peripheral surface of the rubber film 46,
A partition projection is provided to partition the annular space formed between the first plate-shaped metal fitting 42 and the second plate-shaped metal fitting 44 at one location on the circumference, and the annular space is formed on both sides of the partition projection. It is advantageously formed by communicating with the pressure receiving chamber 38 and the equilibrium chamber 40.

In addition to such a partition projection, an annular groove communicating with the annular space is formed in the annular projection 64 so that the interior of the partition member 36 serves as an orifice passage extending at least one round. Is also possible.

Further, in the above embodiment, the partition member 36 is positioned on the second support fitting 14 by fitting the bottomed cylindrical portion 56 of the second plate-like fitting 44 into the tubular fitting 24. However, such a positioning structure is not essential in the present invention.

Further, in the above-mentioned embodiment, the first and second plate-shaped bodies were both constituted by the plate-shaped metal fittings formed by press molding or the like. It is also possible to form one or both of them with a hard material such as a rigid resin, and in that case, the productivity can be improved by simplifying the molding die, and the same effect as that of the above-described embodiment can be achieved. obtain.

In addition, in the above-described embodiment, one specific example of the present invention applied to an engine mount for an automobile is shown. However, the present invention is not limited to the above, and a body mount for an automobile or various vibration proofs other than an automobile. Any can be advantageously applied to the mount.

Although not listed one by one, the present invention
Based on the knowledge of those skilled in the art, it can be implemented in various modified, modified, and improved modes, and
All such embodiments are within the scope of the present invention without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an engine mount as an embodiment of the present invention.

FIG. 2 is a plan view of a first plate-shaped metal fitting that constitutes the engine mount shown in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a plan view of a second plate-shaped metal fitting that constitutes the engine mount shown in FIG. 1.

5 is a sectional view taken along line VV in FIG.

6 is a plan view of a rubber film forming the engine mount shown in FIG. 1. FIG.

7 is a sectional view taken along line VII-VII in FIG.

[Explanation of symbols]

 10 Engine Mount 12 First Support Metal Fitting 14 Second Support Metal Fitting 16 Rubber Elastic Body 32 Diaphragm 36 Partition Member 38 Pressure Receiving Chamber 40 Equilibration Chamber 42 First Plate Metal Fitting 44 Second Plate Metal Fitting 46 Rubber Membrane 48 Bottomed Cylindrical part 50 Flange part 56 Bottomed cylindrical part 58 Flange part 64 Annular protrusion 70 Orifice passage

Claims (1)

[Claims] 1. A first supporting metal member and a second supporting metal member are connected by a rubber elastic body, and a part of a wall portion is provided with the rubber elastic member on both sides of a partition member supported by the second supporting metal member. The pressure receiving chamber formed by the body and the equilibrium chamber in which a part of the wall portion is formed by the flexible film are formed, and a predetermined incompressible fluid is sealed in the pressure receiving chamber and the equilibrium chamber, The partition member has a structure in which the first plate-shaped body and the second plate-shaped body are overlapped with each other, and an orifice passage that connects the pressure receiving chamber and the equilibrium chamber to each other is provided in an outer peripheral portion between the both plate-shaped bodies. A fluid-filled type vibration damping mount in which a rubber film is displaceably disposed in a central portion between the two plate-shaped bodies, and both sides of the rubber film are connected to the pressure receiving chamber and the equilibrium chamber, respectively. The plate and the second plate from the bottomed cylindrical part and the flange part, respectively. As a hat shape, the opening side is faced to each other and overlapped, while the bottomed cylindrical portion of the second plate is larger than the bottomed cylindrical portion of the first plate, The rubber film is inserted into the bottomed cylindrical portion of the first plate-like member to position and hold the outer peripheral surface, and an annular protrusion is provided on the outer peripheral edge of the rubber film to form the annular protrusion. And the second plate-shaped body is clamped and gripped to dispose the rubber film between the first and second plate-shaped bodies, and the rubber film in the bottomed cylindrical portion of the second plate-shaped body is disposed. A fluid-filled vibration damping mount, wherein the orifice passage is formed on the outer peripheral side of the annular protrusion of the rubber film.