JPH07248040A - Fluid sealed type mount and manufacture of fluid sealed type mount - Google Patents

Abstract

PURPOSE:To reduce or prevent the inclusion of air into a fluid chamber by closely adhering the working member of a fluid sealed type mount in which metal fittings arranged with a distance are mutually connected by a rubbery elastic body to the inner surface of the rubber elastic body partitioning the fluid chamber in such a manner as to be capable of separating and approaching to the opposed surface in vibration inputting direction. CONSTITUTION:In an engine mount 10, a first metal fitting 12 and second metal fitting 14 arranged opposite to each other with a prescribed space are connected to each other by a rubbery elastic body 16 interposed between them, and the metal fittings are mounted on engine side and body side, respectively, to support a power unit to the body with vibration resistance. The opening part of a cylindrical metal fitting 26 is liquid-tightly covered with a flexible film 52, and a prescribed non-compressive fluid is sealed with the rubber elastic body 16. At the fluid sealing, a shade metal fitting 46 integrated into an integrally vulcanized molding 40 is closely adhered to the rubbery elastic body 16 so that no room for penetration of air is present, and the inclusion of air is thus prevented to effectively exhibit vibration resisting effect.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to the manufacture of a fluid-filled mount and a fluid-filled mount suitable for use in an automobile engine mount or the like, which has a vibration-damping effect based on the flow action of a fluid enclosed therein. It is about the method.

[0002]

BACKGROUND ART As a type of a vibration-proof coupling body or a support body that is interposed between members constituting a vibration transmission system and couples those members in a vibration-proof manner, it has been conventionally used in Japanese Patent Publication No. Sho 62-23178 or As described in Japanese Unexamined Patent Publication No. S60-104824, etc., one of the first mounting member and the second mounting member attached to each one of the members to be vibration-isolated is connected by a rubber elastic body. , A part of the wall portion is formed by the rubber elastic body to form a fluid chamber in which an incompressible fluid such as water is enclosed, and an action of spreading in the fluid chamber in a direction orthogonal to the main vibration input direction A fluid-filled mount having a structure in which a member is provided and supported by a first mounting member to form a constriction channel between the acting member and the inner peripheral surface of the fluid chamber is known. There is. In such a fluid-filled mount, when vibration is input, a fluid flow is generated through a constriction channel formed between the acting member and the inner peripheral surface of the fluid chamber, so that the fluid resonance action or the flow resistance occurs. A predetermined vibration damping effect is exerted on the basis of the flow action such as.

In such a fluid-filled mount, the rubber elastic body is deformed when a supporting load or a vibration load is input, so that the first mounting member and the second mounting member are displaced toward each other. Therefore, in order to avoid contact and interference with other members of the acting member when the rubber elastic body is deformed, as described in the above publication,
Generally, the acting member is arranged near the rubber elastic body in the fluid chamber.

However, when the acting member is disposed near the rubber elastic body in this way, air remains in the gap between the partition member and the rubber elastic body when the fluid is injected into the fluid chamber and filled, and the air remains in the fluid chamber. There is a problem that air is easily mixed. Then, the air mixed in the fluid chamber adversely affects changes in the internal pressure of the fluid chamber at the time of vibration input, and the desired vibration damping effect of the mount based on the fluid flow action and the spring characteristics of the rubber elastic body is sufficient. There was a fear that it would not be exhibited.

In order to deal with such a problem,
When injecting and filling the fluid in the fluid chamber, it is possible to eject the residual air by ejecting the fluid with a nozzle or the like into the gap between the acting member and the rubber elastic body, but then a fluid ejecting device is necessary and Since the number of steps for discharging the residual air increases, there is a problem that the manufacturing is troublesome and the cost is disadvantageous.

It is also possible to increase the volume of the fluid chamber to widen the gap between the partition member and the rubber elastic body, thereby facilitating the discharge of residual air during the injection and filling of the fluid. Increasing the size is unavoidable, and it was never an effective method, especially when the mounting space of the mount is severely restricted, such as an automobile engine mount.

[0007]

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 to enclose a fluid in which air is reduced or prevented from being mixed into a fluid chamber. (EN) Provided is a mount, and a method of manufacturing a fluid-filled mount capable of reducing or preventing air from entering the fluid chamber.

[0008]

In order to solve such a problem, in the present invention, a first mounting member and a second mounting member, which are arranged at a predetermined distance from each other, are connected by a rubber elastic body. On the other hand, a part of the wall portion is formed of the rubber elastic body to form a fluid chamber in which a predetermined incompressible fluid is sealed, and the wall portion is supported by the first mounting member so that In a fluid-filled mount, which is arranged and spreads in a direction substantially orthogonal to the main vibration input direction, and which has an operating member that forms a constriction flow path between the fluid chamber and the inner peripheral surface of the fluid chamber, the operating member is It is characterized in that the inner surface of the rubber elastic body defining the fluid chamber is closely contacted with the inner surface of the rubber elastic body so as to be separable over substantially the entire opposing surface in the main vibration input direction.

In such a fluid-filled mount, the acting member is generally placed in the fluid chamber such that at least the outer peripheral portion thereof is separated from the rubber elastic body when the rubber elastic body is deformed by the initial load applied when the mount is mounted. Designed to be positioned.

Further, it is possible to integrally provide the acting member with an annular projecting portion which extends from the outer peripheral edge portion thereof in substantially parallel to the main vibration input direction, whereby the annular projecting portion and the fluid chamber are formed. An annular constricted flow path, in which a fluid flow is generated at the time of vibration input, can be advantageously formed between the opposing surfaces that are substantially orthogonal to the main vibration input direction with the inner peripheral surface.

Further, the structure for supporting the acting member by the first mounting member is not particularly limited, but for example,
The action member can be supported by providing a support portion that penetrates the rubber elastic body from the first mounting member and projects into the fluid chamber, and by fixing the action member to this support portion.

In the case where such a support structure for an action member is adopted, an annular recessed portion that is located around the support portion and opens toward the fluid chamber is formed in the rubber elastic body, and the recessed portion is formed in the recessed portion. You may form an annular convex part in an operation member which enters and adhere | attaches the inner surface of this concave part.

Still further, by forming another part of the wall portion of the fluid chamber with a flexible film and partitioning the fluid chamber with a partition member supported by the second mounting member, a rubber elastic body is obtained. Is divided into a pressure-receiving chamber in which a part of the wall portion is formed and the action member is arranged therein, and an equilibrium chamber in which a part of the wall portion is formed of a flexible film and the volume is variable. At the same time, it is possible to form an orifice passage that connects the pressure receiving chamber and the equilibrium chamber to each other.

Further, according to the present invention, the first mounting member and the second mounting member, which are arranged at a predetermined distance from each other, are connected by a rubber elastic body, and at the same time, a part of the wall portion is formed by the rubber elastic body. Has a fluid chamber in which a predetermined non-compressible fluid is sealed, and is supported by the first mounting member, so that in the direction substantially orthogonal to the main vibration input direction in the fluid chamber. When manufacturing a fluid-filled mount including an operating member that expands to form a constricted flow path between the fluid chamber and the inner peripheral surface of the fluid chamber, in a non-compressible fluid,
After the action member is brought into close contact with the inner surface of the rubber elastic body that defines the fluid chamber over substantially the entire opposing surface in the main vibration input direction, fluid sealing that closes the fluid chamber in a fluid-tight manner Also featured is a method of manufacturing a mount.

The operation of closely contacting the action member with the inner surface of the rubber elastic body may be performed at least temporarily in the fluid before closing the fluid chamber, and by applying a load from the outside to deform the rubber elastic body. The acting member may be forcibly brought into close contact with the inner surface of the rubber elastic body.

[0016]

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 includes a first mounting member 12 and a second mounting member 14 that are arranged to face each other with a predetermined distance therebetween.
Are connected by a rubber elastic body 16 interposed therebetween, and the first mounting member 12 and the second mounting member 14 are mounted on each of the engine side and the body side. As a result, the power unit including the engine can be supported in a vibration-proof manner with respect to the body. In such a mounted state, the supporting load of the power unit is exerted in the direction in which the first mounting member 12 and the second mounting member 14 are opposed to each other, and the rubber elastic body 16 is elastically deformed. Metal fittings 1
2, 2 and 14 are positioned close to each other (see FIG. 3), and a main vibration load for the purpose of vibration isolation is input in the substantially opposing direction of the both mounting brackets 12, 14.

More specifically, the first mounting member 12 has a circular flat plate shape, and a mounting bolt 18 is projected upward (to the upper side in FIG. 1, hereinafter the same) at the central portion thereof. Have been fixed. Also, this first mounting bracket 12
In the central portion of the lower surface of the
By being welded at the opening, it is fixed so as to project downward (hereinafter referred to as the lower side in FIG. 1; the same applies hereinafter), and at the bottom of the support metal fitting 20, a locking metal fitting 24 having a caulking portion 22 is provided. Is welded and fixed, and the caulking part 2
2 is positioned so as to project downward. In addition, in the present embodiment, the support fitting 20 and the locking fitting 24 constitute a support portion that is positioned to project in the fluid chamber.

On the other hand, the second mounting member 14 is a tubular member 26.
And the bottom metal fitting 28. The tubular metal member 26 has a substantially large-diameter cylindrical shape as a whole, and one end (upper) in the axial direction has a tapered shape in which the diameter is expanded outward over a predetermined length. A step portion 29 is provided at the other end portion in the axial direction, the step portion 29 expanding outward in the radial direction,
Further, a caulking portion 30 extending downward is integrally formed on an outer peripheral edge portion of the step portion 29.

Further, the bottom metal fitting 28 has a bottomed cylindrical shape having a substantially large diameter as a whole, and the bottom wall portion 32 thereof is provided with an air vent hole 33 and the bottom wall portion 32.
A mounting bolt 34 is fixed to the central portion of the so as to project downward. Further, in the peripheral edge of the opening of the bottom fitting 28,
A flange portion 36 that expands outward in the radial direction is provided, and the outer peripheral edge portion of the flange portion 36 has
An annular spacer portion 38 that rises upward is formed to project. Then, the flange portion 36 of the bottom metal fitting 28
Is superposed on the step portion 29 of the tubular metal fitting 26, and the tubular metal fitting 2
By being crimped and fixed at the crimping portions 30 of 6 to be integrated, the second mounting member 14 is configured to have a deep-bottomed, generally bottomed cylindrical shape as a whole.

Here, the tubular metal fittings 26 are arranged at a predetermined distance in the axial direction on the substantially same axis center with respect to the first mounting hardware 12, and the first mounting hardware 12 and the tubular metal fittings are arranged. A rubber elastic body 16 is interposed between the surfaces facing 26. As a result, the first mounting member 12 and the tubular member 26 are elastically connected by the rubber elastic body 16.

The rubber elastic body 16 has a substantially truncated cone shape as a whole, and the first mounting member 12 is vulcanized and bonded to the end surface on the small diameter side, while the outer peripheral surface of the end portion on the large diameter side is formed. A tubular metal fitting 26 is vulcanized and adhered to. Further, at the central portion of the rubber elastic body 16, the support fitting 20 and the locking fitting 2 are provided.
4 penetrates from the side of the first mounting member 12 and projects toward the large-diameter side end surface. That is, the rubber elastic body 16 is formed as an integrally vulcanized molded product 40 including the first mounting member 12, the supporting metal member 20, the locking metal member 24, and the tubular metal member 26. A thin rubber layer 41 is provided on the inner peripheral surface of the cylindrical wall of the cylindrical metal member 26 over substantially the entire surface thereof.

Also, on the large diameter side end surface of the rubber elastic body 16,
A large diameter tapered recess 42 is provided. Further, in the central portion of the recess 42, the locking metal fitting 2 protruding there
An annular recess 44 extending so as to surround the circumference of the rubber elastic body 4 is formed so that stress concentration in the vicinity of the fixed portion of the rubber elastic body 16 to the locking metal fitting 24 is relieved.

Further, the recess 42 in the rubber elastic body 16
An umbrella metal fitting 46 as an operating member is attached to the locking metal fitting 24 that is projected in the central portion of the caulking portion 22.
Is stuck by. The umbrella metal fitting 46 has an inverted mortar shape substantially corresponding to the recess 42 of the rubber elastic body 16 and has an outer diameter smaller than the inner diameter of the tubular metal fitting 26.
By being caulked and fixed to the locking metal fitting 24 at the bottom, it is arranged in the tubular metal fitting 26 so as to spread in the direction perpendicular to the axis. An annular convex portion 48 that protrudes upward and continuously extends in the circumferential direction is formed on the outer peripheral edge portion of the bottom of the umbrella metal fitting 46 in a shape corresponding to the annular concave portion 44 of the rubber elastic body 16.

The umbrella metal fitting 46 is the locking metal fitting 24.
When assembled in, the upper surface facing the rubber elastic body 16 is closely attached to the rubber elastic body 16 in a separable manner. That is, the upper surface of the umbrella metal fitting 46 is in close contact with the inner surface of the recess 42 of the rubber elastic body 16 in a non-bonded state without air between them. In addition, the annular convex portion 48 of the umbrella metal fitting 46 also comes into close contact with the annular concave portion 44 formed in the rubber elastic body 16 to prevent air from entering the annular concave portion 44.

In order to mount the umbrella metal fitting 46 in close contact with the rubber elastic body 16 in this manner, for example, after forming the integrally vulcanized molded article 40, the umbrella metal fitting 46 is attached to the rubber elastic body 1.
This can be done by pressing and crimping in the recess 42 of 6. At this time, if the rubber elastic body 16 is elastically deformed to press the umbrella metal fitting 46,
The umbrella metal fitting 46 can be advantageously closely attached to the rubber elastic body 16. In addition, after the umbrella metal fitting 46 is assembled to the locking metal fitting 24 by applying a release agent to the metal fitting 46,
It is also possible to vulcanize the rubber elastic body 16.

Further, in the integrally vulcanization molded product 40 in which the umbrella metal fitting 46 is assembled in a close contact state, the tubular metal fitting 26 is
The partition member 50 and the flexible film 52 with respect to the opening of the
, Respectively, and the bottom fitting 28 is assembled from the outside. Then, the flange portion 36 of the bottom metal fitting 28 is caulked and fixed to the caulking portion 30 of the tubular metal fitting 26, whereby the second mounting metal fitting 14 is attached.
And the partition member 50 and the flexible film 52 are sandwiched at their outer peripheral edge portions by the caulking portions of the bottom metal fitting 28 and the tubular metal fitting 26, so that the second mounting metal fitting 1 is formed.
It is fixedly supported by 4.

The flexible film 52 is formed of a thin disk-shaped rubber film having a ring fitting 55 vulcanized and bonded to the outer peripheral edge thereof, and the ring is formed at the caulking portion of the bottom fitting 28 and the tubular fitting 26. The metal fitting 55 is assembled by being clamped in a fluid-tight manner. The partition member 50 has a bottomed cylindrical shape with a substantially shallow bottom, and has a first partition fitting 62 and a second partition fitting 64 each having an outwardly facing flange portion at the peripheral edge of the opening. The bottom metal fitting 28 and the tubular metal fitting 26 are assembled by being sandwiched between the bottom metal fittings 28 and the tubular metal fitting 26, and the flange portions that are overlapped with each other are sandwiched therebetween.

As a result, the opening of the tubular fitting 26 is fluid-tightly covered by the flexible film 52, and a predetermined non-compression is provided between the flexible film 52 and the rubber elastic body 16. A fluid chamber 54 in which the sexual fluid is enclosed is formed. In addition,
In the present embodiment, in order to advantageously obtain the vibration damping effect based on the resonance effect of the fluid, the fluid filled in the fluid chamber 54 is a low-viscosity fluid such as water, alkylene glycol, polyalkylene glycol, silicone oil, and the like. Viscosity is 0.1Pa
・ S or less is preferably adopted.

Further, a partition member 50 is disposed inside the fluid chamber 54, and the partition member 50 divides the fluid chamber into two parts, whereby a part of the wall portion is made of the rubber elastic body 16. The rubber elastic body 16 is configured when vibration is input.
Pressure receiving chamber 56 where internal pressure fluctuation is generated based on the deformation of
And a part of the wall portion is configured by the flexible film 52, and the volume change is allowed based on the deformation of the flexible film 52.
8 are formed on both sides of the partition member 50. An air chamber 60 that allows deformation of the flexible film 52 is provided between the flexible film 52 and the bottom fitting 28.

In the outer peripheral portion of the partition member 50, the pressure receiving chamber extends through the communicating holes 70 and 72 between the cylindrical wall portions of the first partition fitting 62 and the second partition fitting 64 in the circumferential direction. By communicating with the pressure receiving chamber 56 and the equilibrium chamber 58, the orifice passage 74 is formed by communicating with the pressure receiving chamber 56 and the equilibrium chamber 58. It should be noted that, in the present embodiment, tuning is performed so that a high damping effect against low frequency vibration such as shake is exhibited based on the resonance action of the fluid that is made to flow through the inside of the orifice passage 74.

A movable rubber plate 76 is accommodated in the central portion of the partition member 50 so as to be displaceable by a predetermined amount between the bottom wall portions of the first partition fitting 62 and the second partition fitting 64. Based on the displacement of the movable rubber film 76, between the pressure receiving chamber 56 and the equilibrium chamber 58 through the through holes 75 and 77 formed in the bottom wall portions of the first and second partition fittings 62 and 64. Fluid flow is allowed. And
In this embodiment, the fluid flow based on the displacement of the movable rubber film 76 is tuned so that the rise of the internal pressure of the pressure receiving chamber 56 is mitigated when the high frequency vibration such as the muffled sound is input, and the increase of the vibration transmissibility is suppressed. -ing

Here, the fluid is enclosed in the fluid chamber 54 (the pressure receiving chamber 56 and the equilibrium chamber 58) by, for example, as shown in FIG. Assembly of the flexible film 52 and the bottom metal fitting 28,
It can be advantageously done by working in a fluid. That is,
The integral vulcanization molded product 40 is immersed in a fluid, and the tubular metal fitting 26 is turned upside down to open the tubular metal fitting 26 upward in the vertical direction so that the fluid is filled inside the tubular metal fitting 26. By superposing the partition member 50 and the flexible film 52 on the opening of and sealing with the bottom metal fitting 28,
The fluid can be injected and sealed in the fluid chamber 54. Note that the caulking operation of the bottom metal fitting 28 of the tubular metal fitting 26 can be performed after the fluid fitting is taken out from the fluid as long as the fluid chamber 54 can be hermetically sealed. In addition, the partition member 50 includes the first and second partition fittings 62,
By assembling 64 or by rotating or tilting the first and second partition fittings 62, 64 after the assembly, the air is removed from the inside before the assembly to the integrally vulcanized molded product 40. It is desirable to set it. Furthermore, the fluid that has entered the bottom fitting 28 can be discharged through the air vent hole 33 after taking out the assembly from the fluid.

At the time of such fluid filling, the umbrella metal fitting 46 assembled to the integrally vulcanized molded product 40 is in close contact with the rubber elastic body 16, and the air gap between the umbrella metal fitting 46 and the rubber elastic body 16 is fixed. Because there is no room for
It is possible to advantageously prevent the entry of air into the fluid chamber 54 without performing a special air venting process or the like.

In the engine mount 10 having such a structure, as described above, the first mounting member 12 and the second mounting member 14 are respectively attached to the power unit and the body (not shown) by mounting bolts 18 respectively. , 34 are fixed by being fixed. And
In such a mounted state, as shown in FIG. 3, the rubber elastic body 16 is deformed by the supporting load exerted by the power unit so that the first mounting member 12 and the second mounting member 14 approach each other. The support metal fittings 20 and the locking metal fittings 24 fixed to the first mounting metal fitting 12 cause the pressure receiving chamber 56 to move.
As a result of being pushed inward, the umbrella metal fitting 46 fixed to the locking metal fitting 24 is pushed out of the rubber elastic body 16 and positioned in the pressure receiving chamber 56.

As a result, in the pressure receiving chamber 56, the umbrella fitting 46, the rubber elastic body 16 and the tubular fitting 26 (rubber layer 41).
A constricting channel 78 in which a fluid flow is generated at the time of vibration input can be advantageously formed between the surfaces facing each other. In addition,
In the present embodiment, tuning is performed so that a low dynamic spring effect is exerted at the time of vibration input in the middle frequency range based on the resonance action of the fluid that is caused to flow through the constriction flow path 78.

That is, in the engine mount 10 having the above-described structure, the umbrella metal fitting 4 is used when the mount is manufactured.
Since 6 is in close contact with the rubber elastic body 16 and does not enclose air between them, it is easy to mix air into the fluid chamber 54 when the fluid is enclosed in the fluid chamber 54. Therefore, the adverse effect of the mixed air can be prevented, and the desired vibration damping effect based on the fluid flow action of the orifice passage 74, the movable rubber film 76, and the narrowed flow passage 78 can be achieved. It can be effectively and stably exhibited, and the desired mount anti-vibration characteristics can be advantageously realized.

Moreover, in this embodiment, since the umbrella metal fitting 46 is in close contact with the rubber elastic body 16 under the condition that no load is applied to the rubber elastic body 16, a nozzle or the like is used during assembly in the fluid. It is possible to prevent air from being mixed into the fluid chamber 54 without requiring any special work such as discharging residual air, so that excellent mount manufacturability can be exhibited.

Further, when the mount is attached, the umbrella metal fitting 4
Since 6 is located away from the rubber elastic body 16, the rubber elastic body 16 of the umbrella metal fitting 46 at the time of vibration input.
The contact with or interference with is reduced or prevented, and the durability of the rubber elastic body 16 can be advantageously ensured.

Although the embodiment of the present invention has been described above, this is a literal example, and the present invention should not be construed as being limited to such a specific example.

For example, the specific shape of the acting member is not limited to that of the above embodiment. Specifically, as shown in FIG. 4, the outer peripheral edge portion of the umbrella metal fitting 46 is extended in the axial direction (main vibration input direction) according to the anti-vibration characteristics required for the mount, and the annular protrusion is formed. By forming the portion 80, it is also possible to form the annular constriction flow passage 81 between the opposing surfaces of the annular protruding portion 80 and the inner peripheral surface of the pressure receiving chamber 56. That is, if such an annular protruding portion 80 is formed, the narrowed flow path can be formed more advantageously between the umbrella metal fitting 46 and the inner peripheral surface of the pressure receiving chamber 56, so that the narrowed flow path is formed. The tuning range can be sufficiently secured by setting the length, the cross-sectional area and the like, and the vibration damping effect can be further improved.

An outer peripheral edge portion of the umbrella metal fitting 46 is formed to form an annular protrusion 80 on the outer peripheral edge portion of the metal umbrella fitting 46 or to prevent the rubber elastic material 16 from being damaged when it comes into contact with the rubber elastic material 16. In the case of curving downward, it is not necessary to closely attach the annular protruding portion 80 and the curved portion formed on the outer peripheral edge portion of the umbrella metal fitting 46 to the rubber elastic body 16. That is, the outer peripheral portion of the umbrella metal fitting 46 can easily discharge air even if it is not in close contact with the rubber elastic body 16, so that the effect of the present invention is not adversely affected.

Further, in the above embodiment, in order to prevent air from remaining in the annular concave portion 44 formed in the rubber elastic body 16, the annular convex portion 48 which enters the annular concave portion 44 and adheres closely to the umbrella metal fitting 46. Although it is formed integrally, if the rubber elastic body 16 is not formed with the annular recess 44, of course, it is not necessary to provide such an annular protrusion 48. Furthermore, in the above-described embodiment, the substantially inverted mortar-shaped umbrella metal fitting 46 is used, but depending on the shape of the inner peripheral surface of the rubber elastic body 16, an operating member having another shape such as a disc may be appropriately used. Can be adopted by.

Further, in the above-described embodiment, the umbrella metal fitting 46 is provided with the rubber elastic body 16 under the condition that no load is applied to the rubber elastic body 16.
The air is prevented from remaining between the umbrella metal fitting 46 and the rubber elastic body 16 by being closely attached to the umbrella metal fitting. Even if there is a gap between the rubber elastic body 46 and the rubber elastic body 16, as shown in FIG. 5, when the fluid is filled, the rubber elastic body 16 is deformed by applying a load in the fluid. It is also possible to forcibly bring the umbrella fitting 46 into close contact with the rubber elastic body 16. In FIG. 5, reference numeral 82 is a cylindrical base that supports the tubular fitting 26, and 84 is a pressing rod for applying a load to the umbrella fitting 46. The base 82 and the pressing rod 84 can be removed after the umbrella metal fitting 46 is once brought into close contact with the rubber elastic body 16 in a fluid, and then,
Similar to the above-described embodiment, the partition member 50, the flexible film 52, and the bottom metal fitting 28 are assembled to the integrally vulcanized molded product 40.

Even when such a compulsory contact operation of the umbrella metal fitting 46 with the rubber elastic body 16 is adopted, the fluid chamber 5
When injecting the fluid into 4, the air can be discharged easily and quickly with sufficient certainty and with sufficient certainty as compared with the work of discharging the residual air using a nozzle or the like. Each shape of the umbrella metal fitting 46,
There is an advantage that it can be set more freely than in the case of the above embodiment.

The structure for supporting the operating member by the first mounting member is not limited to that of the above embodiment.
For example, as described in Japanese Patent Application Laid-Open No. 60-104824, a first mounting member having an inverted truncated cone shape is adopted, and its tip portion is positioned so as to project into the fluid chamber, and the action member is placed there. A support structure fixed by bolts or caulking may also be used.

Further, in the above embodiment, the movable rubber film 7 is provided for the partition member 50 which partitions the pressure receiving chamber 56 and the equilibrium chamber 58.
A hydraulic pressure absorbing mechanism that allows fluid flow between the two chambers 56 and 58 based on the displacement of No. 6 has been adopted, but such a hydraulic pressure absorbing mechanism is appropriately adopted according to the required characteristics of the mount and the like. However, it is not always necessary to provide it.

Further, the engine mount 10 of the above embodiment.
In this case, the pressure receiving chamber 5 partitioned by the partition member 50
Although a fluid chamber consisting of 6 and the equilibrium chamber 58 was provided, a single fluid chamber structure as described in Japanese Patent Publication No. 62-23178 may be adopted depending on the required characteristics of the mount. Is.

Furthermore, even when the umbrella metal fitting 46 is forcibly brought into close contact with the rubber elastic body 16, it is not limited to the method shown in FIG. 5, and instead of the pressing rod 84, for example. Also, by adopting a tension rod screwed to the mounting bolt 18 and pulling the first mounting member 12 downward to cause elastic deformation of the rubber elastic body 16, the umbrella metal member 46 is fixed to the rubber elastic body 16. It is possible to forcibly adhere them to each other.

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
It goes without saying that all such embodiments are included in the scope of the present invention without departing from the spirit of the present invention.

[0051]

As is apparent from the above description, in the fluid-filled mount having the structure according to the present invention, the operating member is in close contact with the rubber elastic body and does not entrap air between them. Due to the structure, it is possible to effectively and easily prevent air from being mixed into the fluid chamber without the need for a special device or operation when enclosing the fluid in the fluid chamber. The vibration damping characteristics of the mount can be exhibited advantageously and stably.

Further, if the operating member is formed with the annular protrusion, the tuning range of the narrowed flow passage formed in the fluid chamber can be sufficiently ensured, and the design freedom of the mount vibration isolation effect and the vibration isolation effect can be further improved. Can be improved.

Furthermore, by providing a supporting portion that penetrates the rubber elastic body from the first mounting member and projects into the fluid chamber, the support of the operating member with respect to the first mounting member can be easily and advantageously performed.

Further, if an annular concave portion opening around such a supporting portion is formed in the rubber elastic body, and a convex portion that enters into the concave portion and is brought into close contact is formed in the acting member, air flowing into the fluid chamber can be prevented. The durability of the rubber elastic body can be improved while avoiding the mixture.

Furthermore, if the fluid chamber is divided into a pressure receiving chamber and an equilibrium chamber and an orifice passage that connects these chambers is formed, the vibration damping effect based on the resonance action of the fluid flowing through the orifice passage is also utilized. Therefore, it is possible to further improve the mount anti-vibration characteristics.

On the other hand, according to the method of the present invention, since the acting member is adhered to the rubber elastic body in the fluid, air is prevented from remaining between the acting member and the rubber elastic body. Air is quickly and reliably prevented from entering, and therefore, a mount having a desired vibration damping property can be stably manufactured with excellent manufacturability.

Further, in the method of the present invention, the action member is in close contact with the rubber elastic body without applying a load to the rubber elastic body, and the action member is not in contact with the rubber elastic body. There is a gap between the rubber elastic body and the rubber elastic body, and when the fluid is injected and filled, the rubber elastic body is deformed by applying a load to the rubber elastic body to force the acting member against the rubber elastic body. It is also possible to bring them into close contact with each other, whereby air can be reliably discharged, and the degree of freedom in designing the respective shapes of the rubber elastic body and the acting member can be more advantageously ensured.

[Brief description of drawings]

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

FIG. 2 is an exploded view for explaining the method of manufacturing the engine mount shown in FIG.

FIG. 3 is an explanatory longitudinal sectional view showing a state where the engine mount shown in FIG. 1 is mounted on a vehicle.

FIG. 4 is a vertical cross-sectional explanatory view showing an engine mount as another embodiment of the present invention.

FIG. 5 is an explanatory view for explaining a method of manufacturing an engine mount as another embodiment of the present invention.

[Explanation of symbols]

 10 Engine Mount 12 First Mounting Metal Fitting 14 Second Mounting Metal Fitting 16 Rubber Elastic Body 20 Support Metal Fitting 24 Locking Metal Fitting 40 Integrated Vulcanized Molded Product 44 Annular Recessed 46 Umbrella Metal Fitting 48 Annular Convex 50 Partition Member 52 Flexible Membrane 54 Fluid chamber 56 Pressure receiving chamber 58 Equilibrium chamber 74 Orifice passage 78 Narrow flow passage 80 Annular protrusion

Claims (7)

[Claims] 1. A first elastic member and a second elastic member, which are arranged at a predetermined distance from each other, are connected by a rubber elastic body, while a part of a wall portion is formed by the rubber elastic body. A fluid chamber in which a predetermined incompressible fluid is enclosed, and is disposed in the fluid chamber by being supported by the first mounting member, and spreads in a direction substantially orthogonal to the main vibration input direction. A fluid-filled mount comprising an action member that forms a constricted flow path between the fluid chamber and an inner peripheral surface of the fluid chamber, wherein the action member is provided on an inner surface of the rubber elastic body that defines the fluid chamber. The fluid-filled mount is characterized in that it is closely attached so as to be separable over substantially the entire opposing surface in the main vibration input direction. 2. An outer peripheral edge portion of the acting member extends substantially parallel to a main vibration input direction, and opposes an inner peripheral surface of the fluid chamber at a predetermined distance in a direction substantially orthogonal to the main vibration input direction. A fluid-filled mount according to claim 1, wherein an annular protrusion is located. 3. A support portion is provided which penetrates the rubber elastic body from the first mounting member and projects into the fluid chamber, and the action member is fixedly supported on the support portion. The fluid-filled mount according to claim 1. 4. An annular convex portion, which is located around the support portion and opens toward the fluid chamber, is formed in the rubber elastic body, and the annular convex portion is fitted into the concave portion and adheres closely to the inner surface of the concave portion. 4. A portion is formed on the acting member.
The fluid-filled mount according to item 1. 5. The rubber elastic member is formed by a partition member in which another part of the wall portion of the fluid chamber is formed of a flexible film, and the fluid chamber is supported by the second mounting member. A pressure receiving chamber in which a part of the wall portion is formed by the body and the acting member is arranged inside, and an equilibrium chamber in which a part of the wall portion is formed by the flexible film and the volume is variable. The fluid-filled mount according to any one of claims 1 to 4, wherein the pressure receiving chamber and the equilibrium chamber are connected to each other through an orifice passage. 6. A first mounting member and a second mounting member, which are arranged at a predetermined distance from each other, are connected by a rubber elastic body, and the rubber elastic body constitutes a part of a wall portion. By having a fluid chamber in which a predetermined incompressible fluid is enclosed, and being supported by the first mounting bracket,
In manufacturing a fluid-filled mount including an operating member that expands in a direction substantially orthogonal to a main vibration input direction in the fluid chamber and forms a constriction flow path between the fluid chamber and the inner peripheral surface of the fluid chamber, In a volatile fluid, the acting member is brought into close contact with the inner surface of the rubber elastic body that defines the fluid chamber over substantially the entire facing surface in the main vibration input direction, and then the fluid chamber A method for manufacturing a fluid-filled mount, wherein the fluid-tight mount is closed in a fluid-tight manner. 7. The method for manufacturing a fluid-filled mount according to claim 6, wherein the acting member is brought into close contact with the inner surface of the rubber elastic body by deforming the rubber elastic body.