JPH0716126Y2 - Fluid-filled mounting device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a fluid-filled mount device, and in particular, has a stopper function for restricting a displacement amount of a connected body or a supported body when an excessive vibration load is input. The present invention relates to a structure of a fluid-filled mount device that can be advantageously made.

(Background Art) Conventionally, a mount device that is interposed between two members constituting a vibration transmission system to couple those members in a vibration-proof manner or to support one member in a vibration-proof manner with respect to the other member. As one type, as disclosed in Japanese Patent Laid-Open No. 61-62633, European Patent Publication No. 183251, etc., a first support and a second support arranged at a predetermined distance in one vibration input direction. And a support member of (1) are connected by a rubber elastic body interposed therebetween, and a partition member supported by a second support member and arranged in a direction substantially perpendicular to the vibration input direction is sandwiched. , A pressure-receiving chamber into which vibration is input is formed on the side of the first support, and a variable-volume equilibrium chamber, at least a part of which is defined by a flexible membrane, is formed on the side opposite to the pressure-receiving chamber. , While enclosing a predetermined incompressible fluid in the pressure receiving chamber and the equilibrium chamber, An orifice passage that connects the pressure receiving chamber and the equilibrium chamber to each other is provided, and further, the pressure receiving chamber is supported by the first support and spreads in a direction orthogonal to the vibration input direction, and the pressure receiving chamber inner surface. There is known a so-called fluid-filled mount device having a structure in which an umbrella member forming a narrowed portion is arranged between the mounts. In such a mounting device, when vibration is input, the fluid flows between the pressure receiving chamber and the equilibrium chamber through the orifice passage, and the narrowed portion formed between the umbrella member and the pressure receiving chamber inner surface. Flow of the fluid in the pressure receiving chamber through each of the flow paths, and the resonance action of the fluid based on the flow of the fluid causes a predetermined vibration isolation effect set in the orifice passage and the narrowed portion. Can be demonstrated.

By the way, in such a mounting device, in order to suppress the displacement amount of the connected body or the supported body and the deformation amount of the rubber elastic body when an excessive vibration load is input, the first support body and the second support body are usually used. A stopper mechanism for preventing excessive relative displacement with the body will be provided.

Conventionally, as such a stopper mechanism, as disclosed in Japanese Utility Model Laid-Open No. 62-136646, the stopper mechanism is extended outward with respect to the first support and the second support, and the vibration input direction. A pair of stopper portions that are positioned to face each other at a predetermined distance from each other, and the relative displacement between the first support body and the second support body is regulated by the contact of both stopper portions. Of the above structure, or the above-mentioned JP-A-61-62633 and European Patent Publication No. 1
As shown in No. 83251, with respect to the surface of the umbrella member arranged in the pressure receiving chamber on the side of the first support, an annular stopper member that is opposed to the surface at a predetermined distance in the vibration input direction is provided. It is arranged in such a pressure receiving chamber by being supported by a support fitting, and the relative displacement between the first support and the second support is restricted by the contact of the umbrella member with the stopper member. Those having such a structure have been preferably used.

However, in the former stopper mechanism having the stopper portion protruding outward, the mount size is inevitably increased, and the vibration transmissibility may be deteriorated due to the resonance of the stopper portion. It also had problems such as being present. On the other hand, in the latter stopper mechanism in which an annular stopper member that is brought into contact with the umbrella member is arranged in the pressure receiving chamber, interference with the stopper member such as a rubber elastic body during vibration input is likely to be a problem. In addition, since the pressure receiving chamber is narrowed by the provision of the stopper member, its inner hole acts as a fluid flow path, and the resonance action of the fluid flowing in the inner hole causes high-frequency vibration. There is a possibility that the mount anti-vibration performance at the time of input may be disturbed,
There was a big problem inherent in it.

(Problem to be Solved) Here, the present invention has been made in the background of the circumstances as described above, and the problem to be solved is as follows.
The addition of a stopper function that regulates the relative displacement between the first support and the second support when an excessive vibration load is input does not increase the mount size significantly, and also improves the vibration isolation performance of the mount. It is an object of the present invention to provide a fluid-filled mount device having a novel stopper mechanism that can be advantageously made without harm.

(Solution) In order to solve such a problem, in the present invention, a first support and a second support, which are arranged at a predetermined distance in one vibration input direction, are provided. Vibration is input by interposing a partition member which is connected by a rubber elastic body interposed therebetween and which is supported by the second support body and arranged in a direction substantially perpendicular to the vibration input direction. A pressure receiving chamber is formed on the side of the first support, and a variable volume equilibrium chamber, at least a part of which is defined by a flexible membrane, is formed on the side opposite to the pressure receiving chamber. While enclosing a predetermined incompressible fluid in and, is provided with an orifice passage that allows the pressure receiving chamber and the equilibrium chamber to communicate with each other, and further, in the pressure receiving chamber is supported by the first support, the vibration input Expands in the direction perpendicular to the direction and forms a constriction between the pressure receiving chamber and the inside In a fluid-filled mount device in which an umbrella member to be arranged is arranged, the rubber elastic body is structured to include a tapered tubular annular portion, and the first support body is provided on the smaller diameter side of the annular portion. The second support is fixed to the large diameter side of the annular part, and a separate contact member independent of the first and second supports is embedded in the intermediate part of the annular part. , The one end side of the corresponding contact member in the vibration input direction is positioned to oppose the umbrella member in the vibration input direction, while the other end position of the contact member is opposed to the vibration input direction in the vibration input direction. By integrally providing a restricting portion to the side of the second support, the restricting portion of the umbrella member comes into contact with the restricting portion via the abutting member, so that The vibration for the second support That displacement of the force direction is to be restricted, it is an its features.

(Embodiment) Hereinafter, in order to more specifically clarify the present invention, one embodiment of the present invention will be described in detail with reference to the drawings.

First, FIG. 1 shows a specific example of an engine mount for an automobile having a structure according to the present invention, and FIG. 2 shows the apparatus state thereof. In these drawings, 10 and 12 are first and second support fittings, respectively, which are arranged at a predetermined distance in one vibration input direction (vertical direction in the drawings). Also, these first support fittings
A rubber elastic body 30 is interposed between the 10 and the second support metal fitting 12, and the first elastic metal support 10 and the second support metal fitting 12 are provided in the rubber elastic body 30. They are integrally and elastically connected to each other. Then, in such an engine mount, the first support metal fitting 10 and the second support metal fitting 12 are attached to the engine unit side and the vehicle body side, respectively, to support the engine unit with respect to the vehicle body in a vibration-proof manner. It is like this.
At the time of such mounting, the engine unit weight is exerted on such an engine mount, so that the engine mount is placed under a state in which a certain initial load is applied, as shown in FIG. The Rukoto.

More specifically, the first support fitting 10 has a substantially thick disk shape as a whole, and a mounting bolt 16 projecting outward is integrally provided at the center thereof. .

On the other hand, the second support fitting 12 has an outer flange portion 20 on the outer peripheral edge portion.
And a bottom metal fitting 18 having a substantially shallow circular dish shape, and a tubular metal fitting 24 having a substantially cylindrical shape having a caulking portion 22 at an opening at one end side in the axial direction. The caulking portion 22 of the tubular metal fitting 24 is caulked and fixed to the outer flange portion 20 of, and is integrally assembled. In addition, the bottom metal fitting that constitutes the second support metal fitting 12
A mounting bolt 25 projecting from the outer surface of the bottom is integrally provided on the base 18.

Then, the first support metal fitting 10 and the second support metal fitting 12
The second support fittings 12 are concentrically opposed to each other with a predetermined distance from each other in a state where the second support fittings 12 are open to the first support fitting 10 side.

Further, a rubber elastic body 30 which is interposed between the first support metal fitting 10 and the second support metal fitting 12 and elastically connects the both metal fittings 10 and 12 is a ring having a substantially tapered tubular shape. It is formed by the body. Further, in the rubber elastic body 30, a regulating metal fitting 28 having a substantially cylindrical shape is embedded in the radial intermediate portion independently of the first and second supporting metal fittings 10 and 12, and The rubber elastic bodies are arranged concentrically
Irregular deformations in 30 can now be regulated. The rubber elastic body 30 has a cylinder in which the inner peripheral surface of the end on the small diameter side is the outer peripheral surface of the first support fitting 10 and the outer peripheral surface of the end on the large diameter side is the second support fitting 12. By being vulcanized and bonded to the inner peripheral surface of the metal fitting 24, it is formed as an integrally vulcanized molded product having the first support metal fitting 10 and the tubular metal fitting 24.

On the other hand, inside the mount having such a structure, the outer peripheral edge portion is fluid-tightly sandwiched between the caulked portions of the bottom metal fitting 18 and the tubular metal fitting 24 that form the second support metal fitting 12. As a result, the diaphragm 32 as a flexible film is arranged. The inside of the mount is closed by the diaphragm 32 and the closed fluid chamber located on the side of the first support fitting 10 and the bottom fitting 18 side.
It is partitioned into a space 34 that allows deformation of 32. In addition,
The space 34 is communicated with the atmosphere through the through hole 36,
The deformation of the diaphragm 32 is prevented from being hindered by the internal pressure.

The fluid chamber is filled with a predetermined incompressible fluid such as water, alkylene glycol, polyalkylene glycol, or silicone oil. In addition, such fluid is enclosed by, for example, a bottom metal fitting for the caulking portion 22 of the tubular metal fitting 24.
The caulking and fixing of 18 in this fluid can be advantageously performed.

Further, in the fluid chamber, a partition member 38 having a substantially disk shape as a whole is arranged in a direction orthogonal to the vibration input direction, whereby the fluid chamber sandwiches the partition member 38. The pressure receiving chamber 40 located on the side of the first support fitting 10 and in which the internal pressure fluctuation is caused based on the elastic deformation of the rubber elastic body 30 at the time of vibration input, and the diaphragm.
Located on the 32 side, based on the deformation of the diaphragm 32,
It is partitioned into an equilibrium chamber 42 in which fluctuations in internal pressure are avoided.

Here, in the partition member 38, a support metal fitting 46 having a cylindrical shape and having an abutting flange portion 43 and a mounting flange portion 44, which respectively extend outward in the radial direction at the openings at both axial ends thereof, is provided. A rubber elastic plate 48 having a substantially disc shape, which is fixed to the opening of the support metal fitting 46 on the side of the abutting flange portion 43 to close the opening, and has a hat shape having a circular convex portion 50 in the center. With the circular convex portion 50 fitted in the inner hole of the support fitting 46, the support fitting 46
It is configured by a lid fitting 52 that is superposed on the mounting flange portion 43 side of. And, in the partition member 38,
In the outer peripheral edge portion, a concave groove 56 extending in the circumferential direction and opening on the outer peripheral surface is formed, while in the inside thereof, between the overlapping surfaces of the rubber elastic plate 48 and the circular convex portion 50 of the lid fitting 52. A closed air chamber 54 having a predetermined volume and having a substantially disc shape is defined at the position.

Then, the partition member 38 having such a structure, together with the diaphragm 32, in the overlapping portion of the mounting flange portion 44 of the support fitting 46 and the outer peripheral edge portion of the lid fitting 52,
The rubber elastic plate 48 is assembled in a state of being exposed in the pressure receiving chamber 40 by being sandwiched between the bottom metal fitting 18 and the tubular metal fitting 24 that form the second support metal fitting 12 at the crimped portion. Furthermore, by the assembly of the partition member 38,
The opening of the recessed groove 56 is covered with the inner peripheral surface of the tubular metal fitting 24, so that the recessed groove 56 extends in the peripheral direction by a predetermined length and the pressure receiving chamber 40
An orifice passage 58 is formed so as to communicate the and the equilibrium chamber 42 with each other.

As a result, in such an engine mount, when a low-frequency large-amplitude vibration is input between the first and second support fittings 10 and 12, it is generated between the pressure receiving chamber 40 and the equilibrium chamber 42. A high damping effect can be exhibited by the resonance action of the fluid that is made to flow in the orifice passage 58 based on the internal pressure difference, while the elasticity of the rubber elastic plate 48 based on the volume change of the air chamber 54 at the time of input of high frequency small amplitude vibration. Due to the deformation, the increase in the hydraulic pressure in the pressure receiving chamber 40 is alleviated or eliminated, so that the high dynamic spring of the mount caused by the substantial closure of the orifice passage 58 can be advantageously eliminated, Therefore, good vibration damping performance can be exhibited.

It should be noted that the rubber elastic plate 48 is controlled at a low frequency with a high damping effect by the orifice passage 58 because the deformation amount is regulated by the air pressure in the air chamber 54 formed behind it. At the time of inputting the amplitude vibration, the effective hydraulic pressure absorption effect cannot be exerted, so that the flow amount of the fluid through the orifice passage 58 can be sufficiently secured.

Furthermore, in the pressure receiving chamber 40, there is a bottomed cylindrical mounting portion.
An umbrella metal fitting 60 composed of 62 and an annular portion 64 extending outward in the radial direction from the opening of the mounting portion 62 is accommodated and arranged, and at the bottom wall portion of the mounting portion 62, the first support metal fitting. By being fixedly attached to 10, it is arranged so as to open toward the second support fitting 12 side. Then, the inside of the pressure receiving chamber 40 is covered by the umbrella metal fitting 60.
The chamber is roughly divided into two chambers located on both sides in the vibration input direction, and between the outer peripheral surface of the annular portion 64 of the umbrella fitting 60 and the inner peripheral surface of the pressure receiving chamber 40, the divided chambers are divided. An annular narrowed portion 66 that communicates with each other is formed.

An annular ring-shaped rubber 72 integrally provided with an attachment ring 70 on the outer peripheral edge and a mass ring 68 on the inner peripheral edge is arranged at the opening of the umbrella metal fitting 60, and the attachment thereof is performed. The ring 70 is caulked and fixed to the outer peripheral edge of the annular portion 64 of the umbrella fitting 60 so that the opening of the umbrella fitting 60 is closed. Furthermore, a plurality of through holes 74 are provided in the cylindrical wall portion of the mounting portion 62 of the umbrella fitting 60. As a result, a flow path, which is formed by partitioning the inside of the pressure receiving chamber 40 with the metal fitting 60, connects the two divided chambers to each other, independently of the narrowed portion 66, and the metal fitting 60. It is formed inside the.

Further, the umbrella metal fitting 60 can be moved in the vibration input direction in the pressure receiving chamber 40 at the time of vibration input between the first and second support metal fittings 10 and 12, whereby the umbrella metal fitting. A fluid flow through the narrowed portion 66 and the inside of the umbrella metal fitting 60 is generated between the divided chambers formed on both sides of the narrowed portion 60, so that the narrowed portions are formed.
Based on the resonance action of the fluid that flows inside the 66 and the umbrella fitting 60, the low dynamic spring effect can be exerted against the input vibration in the predetermined high frequency range.

In addition, in particular, in the present embodiment, since the mass ring 68 forming the fluid flow path in the umbrella metal fitting 60 is elastically supported by the annular rubber 72 with respect to the umbrella metal fitting 60, the inside thereof is The low dynamic spring effect due to the resonance effect of the fluid that is made to flow can be more effectively exerted as a synergistic effect with the resonance phenomenon of the mass ring 68.
Further, in the present embodiment, the narrowed portion 66 and the umbrella metal fitting are provided.
The low dynamic spring effect based on the resonance action of the fluid flowing through the inside of 60 is higher than the frequency range where the low dynamic spring effect by the hydraulic pressure absorption mechanism by the rubber elastic plate 48 is exerted, and The cross-sectional area, length, etc. of the fluid passages in the narrowed portion 66 and the umbrella metal fitting 60 are set so that they are exhibited in different frequency ranges, which makes it excellent for input vibration in a wide frequency range. The anti-vibration performance can be effectively exhibited.

Furthermore, in such an umbrella fitting 60, when the vibration is input between the first and second support fittings 10 and 12, the pressure receiving chamber is
It will be able to move in 40 in the vibration input direction,
There, on the inner peripheral surface side of the intermediate portion of the rubber elastic body 30 to be positioned in the vibration input direction, with respect to the surface of the annular portion 64 of the umbrella fitting 60 on the first support fitting 10 side. The restriction fitting embedded in the rubber elastic body 30
An annular first contact portion 76 extending inward in the radial direction from one axial end of 28 is formed and positioned. And
When the first and second support fittings 10 and 12 are excessively displaced relative to each other in the separating direction, the annular portion 64 of the umbrella fitting 60 is moved.
Is abutted against the first abutting portion 76.

Further, an annular second contact portion 78 extending outward in the radial direction is formed on the other end side in the axial direction of the restriction fitting 28, and is located on the outer peripheral surface side of the intermediate portion of the rubber elastic body 30. At the same time, the opening side end of the tubular metal fitting 24 constituting the second support fitting 12 is bent radially inward outside the vibration input direction of the second contact portion 78. The restricting portion 80 having the shape of an annular plate, which is formed by the above, is located opposite to each other in the vibration input direction. Then, the displacement of the restriction fitting 28 in the direction away from the second support fitting 12 can be restricted by the contact of the second contact portion 78 with the restriction portion 80. In this embodiment, the contact portion between the second contact portion 78 and the regulating portion 80 is continuously formed in the circumferential direction, and when these contact portions are shown in FIG. As described above, the regulation unit 80
Since the space between the rubber elastic body 30 and the rubber elastic body 30 is sealed, the tubular fitting 24 is provided with a through hole 82 for communicating the sealed space with the external space.

That is, in such an engine mount, when an excessive vibration load in the separating direction is applied between the first and second support fittings 11 and 12, the umbrella fitting 60 causes the restricting fitting 28 to move.
It is abutted against the restricting portion 80 of the tubular metal fitting 24 via, thereby separating the umbrella metal fitting 60 and the first supporting metal fitting 10 from the second supporting metal fitting 12. The amount of displacement in the direction can be defined. A cushioning rubber layer having a predetermined thickness is integrally provided on each of the contact surfaces of the restriction fitting 28 and the cylindrical fitting 24 in the restriction portion 80.

Further, in particular, in the present embodiment, the annular portion 64 of the umbrella metal piece 60.
The surface on the side of the second support fitting 12 in is positioned to face the contact flange portion 43 of the support fitting 46 constituting the partition member 38 in the vibration input direction. Then, by the contact of the umbrella metal fitting 60 with the corresponding contact flange portion 43, between the first and second support metal fittings 10, 12, when an excessive vibration load in the approaching direction is applied, the first support The amount of relative displacement between the metal fitting 10 and the second support metal fitting 12 can be regulated. A cushion rubber 84 is integrally provided on the contact surface of the contact flange portion 43.

Therefore, in the engine mount having the above-described structure, an excessive vibration load does not occur without significantly increasing the mount size and without hindering the vibration isolation effect based on the flow of the enclosed fluid. The stopper function that regulates the relative displacement amount between the first support fitting 10 and the second support fitting 12 at the time of input can be imparted extremely advantageously.

Further, in the present embodiment, the contact member is constituted by the restricting metal fitting 28 for restricting the deformation of the rubber elastic body 30, and
The restricting portion 80 with respect to the tubular metal fitting 24 that constitutes the second support metal fitting 12
Since it has a structure that is integrally formed,
The addition of such a stopper function also has an advantage that it can be realized easily and inexpensively without the need for adding a special member or a manufacturing process.

Although one embodiment of the present invention has been described in detail 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 contact member (regulating metal fitting 28) and the restricting portion (80) with which the contact member is in contact do not necessarily have to be formed continuously over the entire circumference in the circumferential direction, and a suitable number of them are provided in the circumferential direction. You may do it.

Further, the abutting member can be formed of a hard material other than metal, and can of course be configured as a member different from the regulating member that regulates the deformation of the rubber elastic body 30.

Further, the contact member (regulating member) of the umbrella member (the umbrella metal member 60)
It is also possible to provide a cushion rubber on the contact surface against 28).

Furthermore, neither the hydraulic pressure absorption mechanism formed of the rubber elastic plate 48 nor the fluid flow path provided in the umbrella metal fitting 60 is essential for the present invention, and they are not required for the mount. It is appropriately adopted according to the vibration characteristics.

In addition, in the above embodiment, an example of applying the present invention to an automobile engine mount is shown, but the present invention is also advantageously applied to mounting devices such as various mechanical devices. Of course, you get it.

Although not listed one by one, the present invention can be implemented in variously modified, modified, improved, etc. modes based on the knowledge of those skilled in the art. It goes without saying that all of them are included in the scope of the present invention without departing from the spirit.

(Effect of the Invention) As is apparent from the above description, in the fluid-filled mount device having the structure according to the present invention, the regulation of the relative displacement amount between the first support and the second support is restricted. However, the umbrella member is brought into contact with the second support body side through a contact member that is embedded in the rubber elastic body and is separate from the first and second support bodies. Therefore, when providing such a displacement regulation function, it is not necessary to form a large stopper portion outside the mount, a compact mount size can be advantageously realized, and the flow of the fluid enclosed inside is obstructed. Since it is not necessary to dispose the stopper member in the pressure receiving chamber, it is possible to effectively exhibit the vibration damping effect produced by the flow of the enclosed fluid.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a specific example of an engine mount having a structure according to the present invention, and FIG. 2 is a vertical cross-sectional view showing a mounted state of the engine mount. 10: First support metal fitting, 12: Second support metal fitting 28: Control fitting (contact metal fitting) 30: Rubber elastic body, 32: Diaphragm 38: Partition member, 40: Pressure receiving chamber 42: Equilibrium chamber, 58: Orifice Passage 60: Umbrella bracket, 66: Constriction part 76: First contact part, 78: Second contact part 80: Restriction part

Claims (1)

[Scope of utility model registration request] 1. A first support body and a second support body, which are arranged at a predetermined distance in one vibration input direction, are connected by a rubber elastic body interposed therebetween, and At least a part of the pressure receiving chamber, to which the vibration is input, can be provided on the first support body side with a partition member supported by a second support body and arranged in a direction substantially perpendicular to the vibration input direction. A variable volume equilibrium chamber defined by a flexible membrane is provided on the side opposite to the pressure receiving chamber,
Each of the pressure receiving chamber and the equilibrium chamber is filled with a predetermined non-compressible fluid, and an orifice passage is provided to connect the pressure receiving chamber and the equilibrium chamber to each other. A fluid-filled mount device in which an umbrella member that is supported by a support and extends in a direction perpendicular to the vibration input direction and that forms a constriction between the pressure receiving chamber and the inner surface of the pressure receiving chamber is provided. To form a structure having a tapered tubular annular portion, and fix the first support to the small diameter side of the annular portion and the second support to the large diameter side of the annular portion. At the same time, a separate contact member independent of the first and second supports is embedded in the intermediate portion of the annular portion, and one end side of the contact member in the vibration input direction is attached to the umbrella member. While facing the vibration input direction, By providing integrally a regulating portion, which is located opposite to the other end side in the vibration input direction of the contact member in the vibration input direction in the contact member, on the second support body side, the umbrella member with respect to the regulating portion is provided. A fluid-filled mount characterized in that the amount of displacement of the first support with respect to the second support in the vibration input direction can be regulated by abutting via the abutting member. apparatus.