JPH0724672Y2 - Anti-vibration mount device - Google Patents

Description

TECHNICAL FIELD The present invention relates to an anti-vibration mount device preferably used as an automobile engine mount or the like, and more particularly to an anti-vibration mount device having a stopper mechanism for restricting a relative displacement amount of a connected body. The present invention relates to a vibration mount device.

(Background Art) Conventionally, it is interposed between members constituting a vibration transmission system,
As a kind of anti-vibration mount device for anti-vibration connection of these two members or for anti-vibration support of one member with respect to the other member, a first support metal member arranged at a predetermined distance in the vibration input direction. There is known a structure in which a second support fitting is integrally connected with a rubber elastic body interposed therebetween.

Further, although such an anti-vibration mount device has been preferably used as an engine mount for an automobile, for example, in such an automobile engine mount, the anti-vibration support function for the vehicle body of the engine unit and the engine unit are provided. Therefore, a displacement regulation function for preventing an excessive relative displacement of the vehicle body is required.

Therefore, in the anti-vibration mount device as described above, conventionally, as shown in JP-B-53-49985, etc., the first and second support fittings have a predetermined outward shape. Relative displacement between the first support fitting and the second support fitting is provided by integrally providing restriction pieces that project and face each other at a predetermined distance in the vibration input direction, and the relative abutment of these restriction pieces. A stopper mechanism that regulates the amount has been adopted.

However, in the stopper mechanism having such a structure, since the mounting device becomes large and the mount weight increases due to the formation of the restricting piece, the installation space is limited especially in the case of a vehicle engine mount or the like. If so, it was never desirable.

On the other hand, in JP-A-61-140636, etc., by disposing a flexible stopper plate across the first support fitting and the second support fitting, There has been proposed a stopper mechanism having a structure in which the relative displacement amount of the second support fittings in the separating direction is regulated by the tension of the stopper plate.

However, even such a stopper mechanism does not have a sufficient stopper function. That is, as the stopper plate constituting such a stopper mechanism, as described in the above publication, a belt made of a material having a limited elastic property such as cotton or a woven fabric of synthetic fibers is particularly preferably used. That is,
When such an elastic belt is used, not only is it difficult to set a sufficient strength, but it is also difficult to accurately define the displacement regulation amount and it is difficult to obtain a displacement regulation function. It was what I was doing. It is also possible to use a steel belt as the stopper plate, but in such a case, not only the vibration is transmitted through the stopper plate, but also the vibration is amplified by the resonance of the stopper plate, This causes a problem that the anti-vibration characteristics of the mounting device may be impaired.

(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.
An anti-vibration mount device equipped with a stopper mechanism that can advantageously regulate the relative displacement amount of the connected object without significantly increasing the size or weight of the device and without impairing the anti-vibration performance of the mount. To do.

(Solution) In order to solve such a problem, in the present invention, a first support fitting and a second support fitting that are arranged at a predetermined distance in the vibration input direction are provided between them. By integrally connecting with a rubber elastic body interposed in the, and by arranging a flexible stopper plate in a relaxed state, straddling between the first supporting metal fitting and the second supporting metal fitting. In the vibration-proof mounting device in which the relative displacement amount in the separating direction between the first and second support fittings is regulated by the tension of the stopper plate, the stopper plate is formed of at least one metal plate. On the other hand, an elastic layer made of at least one elastic material is alternately laminated and laminated to form a composite plate integrally fixed to the first support metal fitting and A stopper that projects toward at least one of the second support fittings and faces the inner surface of the intermediate portion of the stopper plate in the connecting direction between the first support fitting and the second support fitting. The feature is that the section is provided.

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

First, FIGS. 1 to 3 show a concrete example of an automobile engine mount having a structure according to the present invention. As shown in these drawings, the engine mount 10 of the present embodiment is provided with a first support metal fitting 12 which is arranged to face each other with a predetermined distance in one vibration input direction (vertical direction in FIG. 1). And the second support fitting (14) are configured to include a mount body (17) which is elastically and integrally connected to each other by a rubber elastic body (16) interposed therebetween. And in such engine mount 10,
The first support fitting 12 and the second support fitting 14 in the mount body 17 are respectively attached to either the engine unit side or the vehicle body side,
The engine unit is interposed between them, so that the engine unit is vibration-isolatedly supported with respect to the vehicle body. In this mounted state, the weight of the engine unit is exerted between the first support fitting 12 and the second support fitting 14, so that both support fittings 12, 14 are attached.
However, it is relatively displaced in the approaching direction by a predetermined dimension.

More specifically, in the mount body 17 that constitutes the engine mount 10 of the present embodiment, the first support fitting 12 thereof is
However, while being formed in a substantially thick disk shape, the second support fitting 14 is provided on the one end side in the axial direction with the bottom fitting 20 having a bottomed cylindrical shape having an outer flange portion 18 in the opening. The caulking portion 22 constitutes a cylindrical metal fitting 24 which is caulked and fixed to the outer flange portion 18 of the bottom metal fitting 20.

The first support fitting 12 and the second support fitting 14 are concentrically opposed to each other in a state where the second support fitting 14 is open toward the first support fitting 12 side. , And are integrally connected by the rubber elastic body 16 interposed between them. The rubber elastic body 16 is formed in a substantially frustoconical shape, and the first support fitting 12 is on the small-diameter side end surface and the second support fitting is on the large-diameter side end peripheral surface. The peripheral edge portion of the opening of 14 (the tubular metal fitting 24) is configured as an integrally vulcanization molded product obtained by vulcanization adhesion.

Further, the mounting bolts 26 and the positioning protrusions 28 are integrally provided on the first support fitting 12 so as to project outward, while the second support fitting 14 is provided with the mounting bolts.
30 is integrally formed so as to project outward. Then, the first support fitting 12 and the second support fitting 14 are attached to the engine unit side or the vehicle body side by the mounting bolts 26 and 30, respectively.

Further, inside the second support fitting 14, between the caulking portions of the bottom fitting 20 and the tubular fitting 24, the outer peripheral edge portion is held in a fluid-tight manner so that a diaphragm 32 made of a rubber elastic film is provided. It is arranged. As a result, a sealed fluid chamber is formed between the diaphragm 32 and the rubber elastic body 16. In addition, such a diaphragm 32
A space 34 is formed between the bottom metal 20 and the bottom metal fitting 20 to allow the diaphragm 32 to bulge and deform.

In addition, a predetermined incompressible fluid made of water, alkylene glycol, polyalkylene glycol, silicone oil, or a mixed solution thereof is enclosed in the fluid chamber.

Furthermore, in the fluid chamber in which this incompressible fluid is enclosed,
The partitioning member 36 having a substantially disk-like shape as a whole, its outer peripheral edge portion, together with the diaphragm 32, is fluid-tightly held between the caulking portions of the bottom metal fitting 20 and the tubular metal fitting 24,
It is arranged. The partition member 36 causes the fluid chamber to be located on the rubber elastic body 16 side, the pressure receiving chamber 38 in which internal pressure fluctuation is induced at the time of vibration input, and the diaphragm 32 side to deform the diaphragm 32. It is divided into the equilibrium chamber 40 in which the fluctuation of the internal pressure is avoided on the basis of the above.

The partition member 36 is composed of a first partition plate metal fitting 42 and a second partition plate metal fitting 44 which are axially overlapped with each other. Then, the outer peripheral edge portion of the partition member 36 extends in the circumferential direction between the overlapping surfaces of the partition plate metal fittings 42, 44, and is communicated at both ends into the pressure receiving chamber 38 and the equilibrium chamber 40, so that both An orifice passage 46 having a predetermined length is formed to allow the fluid to flow between the chambers 38 and 40. Further, a large diameter hole 50 closed by a rubber elastic plate 48 is formed in the central portion of the first partition fitting 42, and a plurality of communication holes are formed in the central portion of the second partition fitting 44. Hole
52 is formed, whereby such partition member 36
In the central portion of the above, a hydraulic pressure absorbing mechanism is configured to absorb a predetermined amount of hydraulic pressure fluctuation in the pressure receiving chamber 38 based on elastic deformation of the rubber elastic body 48.

As is well known, in the mount body 17 having such a structure, vibration is input under the mounted state, so that the pressure receiving chamber 38 and the equilibrium chamber 40 are relatively opposed to each other. Since the internal pressure fluctuations are generated, by appropriately tuning the length of the orifice passage 46, the fluid cross-sectional area, etc., a predetermined vibration isolation effect based on the resonance action of the fluid flowing in the orifice passage 46 is obtained. Further, when vibration input in a high frequency range such that the orifice passage 46 is substantially closed, the pressure receiving chamber is provided by the hydraulic pressure absorption function based on the elastic deformation of the rubber elastic body 48. By absorbing or reducing the increase in the hydraulic pressure in 38, a significant increase in the dynamic spring characteristics can be avoided.

Furthermore, in the engine mount 10 of this embodiment,
With respect to the mount body 17 having the structure as described above, straddling between the first support fitting 12 and the second support fitting 14,
A band-shaped stopper plate 54 is attached.

As shown in FIG. 4, the stopper plate 54 is entirely vulcanized and bonded integrally by sandwiching a rubber layer 58 as one elastic layer between two metal plates 56, 56. It is formed with a sandwiched sandwich structure. The metal plate 56 and the rubber layer 58 are
The material and the thickness of the metal plate 56 are not particularly limited, but the metal plate 56 may be of a size that does not hinder the relative displacement of the first and second support fittings 12 and 14 during vibration input to the mount. The rubber layer 58 should be flexible, and the rubber layer 58 should have durability against heat generated in the engine unit.

In the stopper plate 54, mounting holes 60, 60 and a positioning hole 62 are provided at both ends in the longitudinal direction thereof, and the mounting holes 60, 60 and the positioning hole 62 are provided.
The mounting bolts 26, 30 and the positioning protrusions 28 provided on the first and second support fittings 12, 14 are engaged with the mounting main body 17 as described above, so that the first and second It is mounted across the support metal fittings 12, 14.

Further, there, the mount main body 17 is provided with a second support fitting 14 (cylindrical fitting) which is opposed to the stopper play and the inner surface of the central portion in the longitudinal direction of 54 in a direction perpendicular to the vibration input direction. The stopper fitting 64 is fixed to the opening of 24), and the surface of the stopper fitting 64 is covered with the cushioning rubber layer 66, so that the stopper portion projects toward the stopper plate 54 at a predetermined height. 68
Are provided integrally.

Therefore, in the engine mount 10 having the above-described structure, the load of the engine unit is exerted so that the first support fitting 12 and the second support fitting 14 are relatively displaced in the approaching direction by a predetermined dimension. In the mounted state, the relative displacement between the first and second support fittings 12 and 14 at the time of vibration input between the first and second support fittings 12 and 14 can be allowed by the bending of the stopper plate 54. On the other hand, when a large vibration load is input, the relative displacement amount of the first support fitting 12 and the second support fitting 14 in the separating direction is regulated to a certain amount by the tension of the stopper plate 54. It can be done.

Although the stopper portion 68 is in contact with the stopper plate 54 in FIGS. 1 to 3, in the mounted state of the engine mount, the first support fitting 12 and the second support fitting 14 are in contact with each other. Are relatively displaced in the approaching direction by a predetermined dimension due to the weight of the engine unit, so that the stopper plate 54 is positioned a predetermined dimension away from the stopper portion 68. Then, when the displacement of the first and second support fittings 12 and 14 is restricted by the tension of the stopper plate 54, the stopper plate 54 is brought into contact with the stopper portion 68. The shock at the time of contact can be effectively absorbed and reduced by the cushioning rubber layer 66 provided on the stopper portion 68.

Then, in the engine mount 10, there is a stopper plate that constitutes the stopper mechanism.
Since 54 is configured to include the metal plates 56, 56, sufficient strength is exerted against the tensile force exerted even when the relative displacement of the first and second support fittings 12, 14 is restricted. In addition, the extension in the longitudinal direction can be suppressed as much as possible, whereby the relative displacement regulation of the first and second support fittings 12 and 14 is sufficiently durable and accurate, It can be done in an advantageous way.

Further, in the stopper plate 54, when vibration is generated due to input vibration from the outside, elastic deformation is generated in the rubber layer 58 which is interposed and adhered between the metal plates 56 and 56. Therefore, the damping effect of the rubber layer 58 effectively acts on the vibration of the metal plate 56, and the vibration energy can be absorbed. As a result, the vibration level of the stopper plate 54 can be effectively reduced. Therefore, deterioration of the mount anti-vibration characteristics due to vibration transmission by the stopper plate 54 or resonance of the stopper plate 54 itself, It can be effectively avoided.

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 structure of the stopper plate is not limited to that of the above-mentioned embodiment, and as shown in FIG. 5, one metal plate 56 is provided with one metal plate 56 on one surface thereof. A structure in which the rubber layer 58 is integrally provided, or as shown in FIG. 6, by covering one metal plate 56 with a rubber elastic body, both side surfaces of the metal plate 56 are covered. Various laminated structures such as a structure in which the rubber layers 58 are integrally provided or a structure in which two or more metal plates and two or more rubber layers are alternately stacked can be adopted.

Further, as a material for forming the elastic layer forming the stopper plate, other than the rubber material as illustrated, materials having appropriate elasticity such as resin can be adopted.

In addition, the stopper plate, over the entire length,
It is not necessary to have such a laminated structure, and the object of the present invention can be achieved even if, for example, only the central portion thereof is formed with the laminated structure.

Furthermore, the structure for attaching the stopper plate to the first and second support fittings 12, 14 is not limited in any way.

Further, such a stopper plate can be brought into contact with the stopper portion 69 even when the mount is mounted, so that the relative displacement of the first and second support fittings 12 and 14 can be prevented by bending the stopper plate. Also, it is possible to adopt a structure in which the stopper portion 68 is elastically deformable to allow it. And by adopting such a structure,
It is possible to completely prevent hitting sound and impact when the stopper plate comes into contact with the stopper portion 68.

In addition, a plurality of stopper plates as described above may be mounted across the first support fitting and the second support fitting.

Furthermore, in the above-mentioned embodiment, an example of applying the present invention to a fluid-filled type vibration damping mount device is shown. However, the present invention shows a so-called solid type vibration damping device in which fluid is not enclosed inside. It can also be applied to a mounting device.

In addition, it goes without saying that the present invention can be effectively applied to not only the engine mounts for automobiles as illustrated but also the diff mounts for automobiles, or the anti-vibration mount devices in various devices other than automobiles. is there.

In addition, although not listed one by one, the present invention can be implemented in a mode in which various alterations, modifications, improvements, etc. are added 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.

(Effects of the Invention) As is apparent from the above description, in the vibration-proof mounting device having the structure according to the present invention, it is arranged so as to straddle between the first support fitting and the second support fitting. Since the stopper plate that regulates the relative displacement amount of the two support fittings due to the tension is formed by including the metal plate, its durability can be advantageously secured, and the displacement regulation is excellent in accuracy. Further, since the vibration level of the metal plate can be effectively suppressed by the elastic layer integrally fixed to the metal plate, the vibration transmission by the stopper plate and the vibration level of the stopper plate can be suppressed. The deterioration of the mount anti-vibration characteristic due to the vibration amplification due to the resonance of the stopper plate itself does not pose a problem.

Therefore, according to the present invention, therefore, the relative displacement amount of the connected body is effectively regulated without significantly increasing the size and weight of the device and without impairing the vibration damping performance of the mount. The vibration-proof mounting device provided with the obtained stopper mechanism can be advantageously realized.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment in which the present invention is applied to an automobile engine mount, FIG. 2 is a plan view of the engine mount, and FIG. 3 is a III in FIG. -III is a sectional view, and FIG. 4 is an enlarged sectional view of a stopper plate used in such an engine mount. Further, FIGS. 5 and 6 respectively show
FIG. 9 is a sectional view corresponding to FIG. 4, showing another structure of the stopper plate that is preferably adopted in the present invention. 10: Engine mount 12: First support bracket, 14: Second support bracket 16: Rubber elastic body, 17: Mount body 54: Stopper plate 56: Metal plate, 58: Rubber layer

Claims (1)

[Scope of utility model registration request] 1. A first support fitting and a second support fitting, which are arranged at a predetermined distance in the vibration input direction, are integrally connected by a rubber elastic body interposed therebetween. , By arranging the flexible stopper plate in a relaxed state across the first support fitting and the second support fitting, in the direction of separation between the first and second support fittings. In a vibration-proof mounting device in which a relative displacement amount is regulated by tension of the stopper plate, the stopper plate is formed by alternately laminating elastic layers made of at least one elastic material on at least one metal plate. And a stopper plate that is attached to at least one of the first support metal fitting and the second support metal fitting. An anti-vibration mount device, characterized in that a stopper portion is provided which projects toward the plate and faces the inner surface of the intermediate portion of the stopper plate in the connecting direction between the first support metal member and the second support metal member. .