JPH08159208A - Sealing structure in fluid sealed system vibration control support body - Google Patents

Abstract

PURPOSE: To provide a sealing structure in a fluid sealed system vibration control support body by which excellent sealing performance can be secured in spite of a change in internal pressure of a fluid chamber. CONSTITUTION: In a first member 14 and a second member to define at least a part of a fluid chamber, plural crest parts 74 and 76 projecting in a prescribed height are integrally formed in rubber sealing parts 72 arranged on an installing surface of the first member 14 to the second member in a condition of being arranged in the direction for separating from the fluid chamber, and are constituted so that a projecting height of the plural crest parts 74 and 76 become gradually high as they separate from the fluid chamber, and are constituted so that an inclination on the fluid chamber side of the respective crest parts 74 and 76 becomes larger than an inclination on the opposite side of them.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a fluid-filled type vibration-damping support which is suitable for use in an automobile engine mount or the like, and which has a vibration-damping effect based on the flow action of a fluid sealed inside. The present invention relates to a seal structure exhibiting excellent properties.

[0002]

2. Description of the Related Art Conventionally, various vibration-proof supports have been interposed between members constituting a vibration transmission system in order to suppress the vibration transmission and to insulate the vibration transmission. And, as such a vibration-proof support capable of exhibiting an excellent vibration-proof effect, it is provided with a fluid chamber in which a predetermined non-compressible fluid is sealed, and the vibration-proof effect is obtained based on the flow action of the fluid. A so-called fluid-filled type vibration-damping support for achieving the above is known, and has been suitably used as, for example, an automobile engine mount, a suspension bush, or the like.

By the way, in this fluid-filled type vibration-damping support, it is necessary to sufficiently secure the sealing property of the fluid chamber in order to obtain a more excellent vibration-damping effect. Therefore, conventionally, in general, between the first member and the second member that defines at least a part of the fluid chamber by being assembled with each other, the rubber seal portion is interposed under a pinched state, The desired seal is constructed.

More specifically, the rubber seal portion generally has a shape as shown in FIGS. 7 to 9. That is, the rubber seal portion 114 is projected to the first member 116 by a predetermined height from the mounting surface of the first member 116 to the second member (not shown), and the rubber seal portion 114 is provided over the entire circumference. It is provided integrally. Further, a single projecting portion 118 is provided so as to be raised on the tip end surface thereof, in other words, a contact surface for the second member (see FIG. 7), or a groove portion 120 is formed at the center portion in the width direction. By being provided, a plurality of (two in this case) protrusions 118 are formed on both sides thereof (FIG. 8).
And FIG. 9). Then, with the first member 116 and the second member (not shown) assembled to each other, the protrusion 1
By compressing 18 while the rubber seal portion 114 is pressed between the first member 116 and the second member, a seal between the two members can be performed, thereby sealing the fluid chamber. The nature can be secured.

However, in the conventional fluid-filled type vibration-damping support, when the rubber seal portion 114 as shown in FIG. 7 is adopted, since only one protrusion 118 is formed, It was difficult to obtain a sufficient clamping force to secure the sealing property. Further, even when the rubber seal portion 114 as shown in FIGS. 8 and 9 is adopted, the plurality of protrusions 118 are simply adapted to be compressed and deformed in the height direction. Therefore, when the vibration is input, the internal pressure of the fluid chamber is greatly increased, or the fluid chamber is in a negative pressure state before it is functionally attached, such as an automobile fluid-filled engine mount. The seals were not sufficiently reliable for those that cause a large pressure difference between the inside and the outside of the fluid chamber, such as those described above.

Therefore, in order to secure a better sealing property, the rubber seal portion is provided with a plurality of protrusions, and the protrusions can be compressed while being tilted in a certain direction. However, in the conventional seal structure that employs the rubber seal portion 114 as shown in FIGS. 8 and 9, the fluid that has entered the groove portion 120 is assembled with the first member 116 and the second member (not shown). When it is struck, it is confined in the groove 120 and the protrusion 11
As the fluid pressure increases, the protrusions 118, 118 are pressed against each other when they are compressed by the two members, so that the protrusions 118, 118 partially move in the circumferential direction. Moreover, it collapses to the side of the fluid chamber or to the side opposite to it, and becomes unstable, and as a result, it is extremely difficult to obtain effective sealing properties.

[0007]

The present invention has been made in view of the circumstances as described above, and the problem to be solved is to provide a first member and a second member that form a fluid chamber. When assembling, the rubber seal part is provided with a protruding part that is compressed in a certain direction and is compressed, and that exerts a sufficient clamping force, so that an excellent seal is achieved regardless of changes in the internal pressure of the fluid chamber. It is to provide a seal structure in a fluid-filled type vibration-damping support that can secure the property.

[0008]

In the present invention, in order to solve the above problems, a first chamber that is assembled with each other to define at least a part of a fluid chamber in which a predetermined incompressible fluid is enclosed. In a fluid-filled type vibration-damping support including a member and a second member, a rubber seal portion is provided on an assembly surface of the first member with respect to the second member, and the two members are assembled to each other. Below, in the seal structure in which the rubber seal portion is pressed between the first member and the second member to perform sealing between the both members, the first portion of the rubber seal portion A plurality of peaks projecting at a predetermined height are integrally formed on the contact surface with respect to the second member in a state of being arrayed in a direction separating from the fluid chamber, and the projection height of the plurality of peaks. Separate from the fluid chamber Therefore, the first member and the second member are configured so that the inclinations on the side of the fluid chamber of each of the peaks are larger than the inclinations on the side opposite to the inclinations. When assembled, the rubber seal portion is squeezed between the first member and the second member while tilting the plurality of ridges in order from the one separating from the fluid chamber toward the fluid chamber. The feature is that it is obtained.

According to the first preferred embodiment of the seal structure in the fluid-filled type vibration-damping support according to the present invention as described above, the outermost ridge of the plurality of ridges that is most distant from the fluid chamber. A protrusion having a height lower than that of the outermost mountain portion is provided on the inclined surface opposite to the fluid chamber, and the rubber seal portion is provided with the first outermost mountain portion in a state of being tilted toward the fluid chamber. When the first member and the second member are clamped together, the protrusion can be crushed by both members.

According to a preferred second aspect of the present invention, the plurality of crests are arranged close to each other on the contact surface of the rubber seal portion with the second member, and the fluid By being laid down on the room side, they are configured to overlap each other.

Further, according to an advantageous third aspect of the present invention, the fluid-filled type vibration-proof support body comprises first and second attachment fittings, a rubber elastic body connecting them, and the second attachment fitting. Partition member that is supported by the mounting metal fitting and spreads at a right angle to the vibration input direction, and a part of the wall portion is formed by the rubber elastic body, which is formed on the first mounting metal fitting side. A pressure-receiving chamber for enclosing a predetermined incompressible fluid, which sometimes causes fluctuations in internal pressure, and a wall formed at a side opposite to the pressure-receiving chamber and having a part of a wall made of a flexible film. An equilibrium chamber for enclosing a predetermined incompressible fluid, the volume of which is allowed to change based on the second mounting member and the partition member, which are configured as the first and second members, and The rubber seal portion having the mountain portion is formed on the surface of the second mounting member that is attached to the partition member. And thus.

Further, according to a fourth preferred aspect of the present invention, the fluid-filled type vibration-damping support is interposed between the inner and outer cylindrical metal fittings, and is opened toward the outer peripheral surface. A rubber elastic body having a recess and a recess of the rubber elastic body, which is located between the inner tubular fitting and the outer tubular fitting and is connected to the inner tubular fitting by the rubber elastic body. Enclose a predetermined incompressible fluid formed by covering a metal sleeve having a corresponding window portion and a recess of the rubber elastic body opening to the outer peripheral surface through the window portion of the metal sleeve with the outer tubular metal fitting. And a metal chamber, and the metal sleeve and the outer tubular fitting are configured as the first and second members, and the mountain portion is provided on an assembly surface of the metal sleeve with respect to the outer tubular fitting. The rubber seal portion will be formed.

[0013]

Therefore, in the seal structure in the fluid filled type vibration damping support according to the present invention, the space between the first member and the second member that defines at least a part of the fluid chamber is provided. A plurality of ridges protruding at a predetermined height are provided on the contact surface of the rubber seal portion that is clamped by the second member with respect to the second member, and the plurality of ridges are arranged in a direction away from the fluid chamber. Since the protruding height is gradually increased in accordance with the arrangement order, the plurality of ridges provided on the rubber seal portion when the second member is assembled to the first member. The parts can be brought into contact with the second member in order from the one that is most distant from the fluid chamber, and can be further pushed by the second member and collapsed, whereby the rubber seal part Enough in multiple mountains Since the force can be exerted, and the inclination of the plurality of peaks is larger on the fluid chamber side than on the side opposite to the fluid chamber side, all the mountain portions are inclined. The part can be collapsed to the fluid chamber side. In addition, at the time of assembling both the first and second members, the fluid that has entered between the adjacent peaks passes through the gap between the low-height peak and the second member, and The fluid can be satisfactorily discharged toward the side, whereby the fluid is confined between the adjacent first and second ridges, and each ridge is fluidized in the fluid chamber as the fluid pressure increases. Thus, it is possible to effectively prevent pressing on the side opposite to.

Therefore, if the seal structure according to the present invention is adopted, the protrusion provided on the rubber seal portion is sufficiently compressed when the first member and the second member forming the fluid chamber are assembled. It can be compressed with force in a state of being tilted in a certain direction, thereby, for a fluid-filled type vibration-isolating support, especially for a type that causes a large pressure difference inside and outside the fluid chamber. However, the excellent sealing property can be effectively imparted.

When the structure according to the first aspect of the present invention described above is employed, the presence of the protrusions makes it possible to obtain a very excellent sealing property, so that the internal pressure is negative. It is possible to advantageously prevent the inflow of the atmosphere into the fluid chamber that has been put into the state, so that the reliability of the seal can be improved more effectively.

Further, when the structure according to the second aspect of the present invention is adopted, the pressing force at the protruding portion of the rubber seal portion can be further increased, and further excellent sealing performance can be obtained. is there.

Furthermore, when the configuration according to the third aspect of the present invention is adopted, a fluid-filled mount having a high sealing property can be advantageously obtained.

Furthermore, when the configuration according to the fourth aspect of the present invention is adopted, a fluid-filled tubular mount having an excellent sealing property can be advantageously obtained.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention will be described in detail below with reference to the drawings in order to clarify the present invention more specifically.

First, FIG. 1 shows an example of an automobile engine mount 10 in which a seal structure according to the present invention is adopted. The engine mount 10 has a structure in which a first mounting member 12 and a second mounting member 14, which are arranged to face each other with a predetermined distance therebetween, are connected by a rubber elastic body 16 interposed therebetween. The first mounting member 12 and the second mounting member 14 are attached to each of the engine side and the body side, so that 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 opposing direction of the first mounting member 12 and the second mounting member 14, and the rubber elastic body 16 elastically deforms,
Both of the mounting brackets 12 and 14 are positioned close to each other, and the main vibration load for vibration isolation is
The input is made in a direction substantially opposite to the two 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 part of the lower surface of the cup, a support fitting 20 having a cup shape is provided.
By being welded at the opening (see FIG. 1).
The lower part of the inside. The same shall apply hereinafter).

On the other hand, the second mounting member 14 is a tubular member 22.
And bottom metal fitting 24. The tubular member 22 has a substantially large-diameter cylindrical shape as a whole, and one end (upper) in the axial direction is tapered so as to expand outward over a predetermined length, At the other end in the axial direction, a step portion 26 that expands radially outward is provided,
Further, a caulking portion 28 extending downward is integrally formed on an outer peripheral edge portion of the step portion 26.

The bottom fitting 24 has a generally large-diameter dish shape as a whole, and a mounting bolt 32 is fixed to the central portion of the bottom portion 30 so as to project downward. Furthermore,
A flange portion 34 is provided on the peripheral edge of the opening of the bottom metal fitting 24 so as to spread outward in the radial direction. Then, the flange portion 34 of the bottom metal fitting 24 has the step portion 26 of the tubular metal fitting 22.
The second mounting member 14 has a substantially bottomed cylindrical shape with a deep bottom as a whole by being caulked and fixed by the caulking portion 28 of the tubular member 22 to be integrated. Of.

Here, the tubular metal fitting 22 is arranged at a predetermined distance in the axial direction on the substantially same axial center with respect to the first mounting metal fitting 12, and the first mounting metal fitting 12 and the tubular metal fitting. A rubber elastic body 16 is interposed between the surfaces facing 22. As a result, the first mounting member 12 and the tubular member 22 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. The tubular metal member 22 is vulcanized and adhered to. A support fitting 20 is attached to the central portion of the rubber elastic body 16. That is, the rubber elastic body 16 includes the first mounting member 12,
Integrated vulcanization molded product 3 including support metal fitting 20 and tubular metal fitting 22
It is formed as 6.

The partition member 40 and the flexible film 42 are attached to the opening of the tubular fitting 22 in the integrally vulcanized molded product 36, and the bottom fitting 24 is attached from the outside. Has been. And the bottom metal fitting 24
The second mounting member 14 is formed by crimping and fixing the flange portion 34 of the to the caulking portion 28 of the tubular metal member 22, and at the same time, the partition member 40 and the flexible film 42 are The outer peripheral edge portion is sandwiched between the caulking portions of the tubular metal member 22 and the bottom metal member 24, so that they are fixedly supported by the second mounting metal member 14.

The flexible film 42 is made of a thin disk-shaped rubber film having a ring fitting 44 vulcanized and bonded to the outer peripheral edge thereof, and the ring fitting is made at the caulking portion of the tubular fitting 22 and the bottom fitting 24. The metal fitting 44 is assembled by being clamped in a fluid-tight manner. Further, the partition member 40 has a substantially shallow bottomed cylindrical shape, and has a first partition fitting 46 and a second partition fitting 48 each having an outwardly facing flange portion at the peripheral edge of the opening. It is formed by overlapping, and is assembled by sandwiching the overlapped flange portions at the caulking portions of the tubular metal member 22 and the bottom metal member 24.

As a result, the opening of the tubular metal member 22 is covered with the flexible film 42, and the flexible film 4 is thus covered.
A fluid chamber 50 in which a predetermined incompressible fluid is sealed is formed between the rubber elastic body 16 and the rubber elastic body 16. In this embodiment, in order to advantageously obtain the vibration damping effect based on the resonance action of the fluid, a low viscosity fluid such as water or alkylene glycol, polyalkylene glycol or silicone oil is preferably used as the fluid to be enclosed in the fluid chamber 50. Adopted.

Further, since the fluid chamber 50 is divided into two by the partition member 40, a part of the wall portion is constituted by the rubber elastic body 16, and the rubber elastic body 1 is input at the time of vibration input.
The pressure receiving chamber 5 in which the internal pressure fluctuation is generated based on the deformation of 6
2 and a part of the wall portion is configured by the flexible film 42, and the equilibrium chambers 54 in which the volume change is allowed based on the deformation of the flexible film 42 are formed on both sides of the partition member 40. Has been done.
In addition, between the flexible film 42 and the bottom metal fitting 24, the flexible film 42 is provided.
The air chamber 56 allows the deformation of

In the outer peripheral portion of the partition member 40, the pressure receiving chamber extends through the communicating holes 58 and 60 between the cylindrical wall portions of the first partition fitting 46 and the second partition fitting 48 in the circumferential direction. By communicating with 52 and the equilibrium chamber 54, an orifice passage 62 that communicates the pressure receiving chamber 52 and the equilibrium chamber 54 with each other is formed. It should be noted that, in the present embodiment, tuning is performed so that a high damping effect for low-frequency vibrations such as shaking is exhibited based on the resonance action of the fluid that is made to flow through the inside of the orifice passage 62.

A movable rubber plate 64 is accommodated in the central portion of the partition member 40 so as to be displaceable by a predetermined amount between the bottom wall portions of the first partition fitting 46 and the second partition fitting 48. Based on the displacement of the movable rubber plate 64, between the pressure receiving chamber 52 and the equilibrium chamber 54 through the through holes 66 and 68 formed in the bottom wall portions of the first and second partition fittings 46 and 48. Fluid flow is allowed. And
In this embodiment, the fluid flow based on the displacement of the movable rubber plate 64 is tuned so that the increase in the internal pressure of the pressure receiving chamber 52 is mitigated when the high frequency vibration such as the muffled sound is input, and the increase of the vibration transmissibility is suppressed. -ing

By the way, in the engine mount 10 having such a structure, the fluid is sealed in the fluid chamber 50 (the pressure receiving chamber 52 and the equilibrium chamber 54) as shown in FIG. Partition member 40 for the sulfur molded product 36,
It can be advantageously done by assembling the flexible membrane 42 and the bottom fitting 24 in a fluid. That is, the integrally vulcanized molded product 36 is immersed in a fluid to
After reversing the top and bottom to open the tubular metal fitting 22 vertically upward, after filling the inside with the fluid,
The partition member 40 and the flexible film 4 are provided in the opening of the tubular fitting 22.
By stacking the two and sealing them with the bottom metal fitting 24, the fluid can be injected into the fluid chamber 50 and sealed.

Here, in the present embodiment, the rubber elastic body 16 of the integrally vulcanized molded product 36 is connected to the second mounting member 14 along the inner peripheral surface of the cylindrical wall member 22. A thin rubber film 70 extending with a length reaching the inner curved surface of the stepped portion 26 is integrally provided in a state of being vulcanized and bonded to the inner peripheral surface of the tubular wall portion of the tubular fitting 22. . Further, as is clear from FIG. 3, the tip end portion of the rubber film 70 is a rubber seal portion 72, and in other words, the tip end surface, in other words, the partition member 40 of the rubber seal portion 72.
On the contact surface with respect to, the two ridges 74 and 76 are integrally formed that project toward the bottom metal fitting 24 by a predetermined dimension from the inner surface of the step portion 26 of the tubular metal fitting 22 and that extend continuously in the circumferential direction. There is.

Further, the two ridges 74, 76 are arranged in the integrally vulcanized molded product 36 in a state where they are adjacent to each other and outwardly in the radial direction. That is, in the assembled state of the integrally vulcanized molded product 36 to the engine mount 10, they are arranged in the direction away from the fluid chamber 50 (see FIG. 2). Then, in the two mountain portions 74 and 76, the fluid chamber 5
0 (pressure receiving chamber 52) separated from the outer mountain portion 74
Is configured to be higher by a predetermined dimension than the inner mountain portion 76 disposed in the vicinity of the fluid chamber 50, and the surface on the fluid chamber 50 side is substantially vertical, while it is opposite. The surface on the side is an inclined surface inclined toward the fluid chamber 50, and the slopes of the peaks 74 and 76 on the side of the fluid chamber 50 are larger than the slopes on the opposite side. Has been done. Thus, particularly, the fluid chamber 5 of the outer mountain portion 74
A protrusion 78 having a height lower than that of the outer mountain portion 74 is integrally formed on the inclined surface on the side opposite to the 0 side. The difference in protrusion height between the outer mountain portion 74 and the inner mountain portion 76 is preferably about 5 mm.

Therefore, the partition member 40 for the integrally vulcanized molded product 36 having the rubber seal portion 72 as described above is provided.
At the time of assembling, first, the outer ridge portion 74 of the rubber seal portion 72 is brought into contact with the first partition fitting 46 of the partition member 40, and is tilted to the side of the fluid chamber 50 having a larger inclination, and the inner side adjacent to each other. The first partition fitting 46 and the tubular fitting 22 of the second mounting fitting 14 are compressed while being overlapped with the mountain portion 76. At that time, the outer mountain portion 74 and the inner mountain portion 76
The fluid extruded from between and is made to flow toward the fluid chamber 50 through the gap between the inner mountain portion 76 and the first partition fitting 46. Then, the inner ridge portion 76 is brought into contact with the first partition fitting 46, and like the outer ridge portion 74, is tilted to the side of the fluid chamber 50 having a large inclination, so that the first partition fitting 46 and the cylinder are closed. It is compressed with the metal fitting 22. At the same time, the protrusion 78 provided on the outer mountain portion 74
Is also compressed between the first partition fitting 46 and the tubular fitting 22.

Thus, in the engine mount 10 according to this embodiment, the second mounting member 14 and the partition member 40 are used.
And the inner side of the rubber seal portion 72 are overlapped with each other so that the fluid chamber 5
It is tilted to the 0 side, compressed between the tubular metal fitting 22 of the second mounting metal fitting 14 and the first partition metal fitting 46 of the partition member 40 with a large clamping force, and further provided on the outer mountain portion 74. The protruding portion 78 is also compressed by the metal fittings 22 and 46, and the rubber seal portion 72 causes the second mounting metal fitting 1 to be compressed.
4 and the partition member 40 can be clamped. As is clear from this, in the present embodiment, the second member 14 causes the first member to
In addition, the support member 40 constitutes each of the second members.

Therefore, in the engine mount 10 according to the present embodiment, even when the fluid chamber 50 is in a negative pressure state before being attached to a predetermined portion of the automobile, the engine mount 10 is also attached to the predetermined portion. Later, even when the internal pressure of the fluid chamber 50 is increased when the vibration is input,
Compared with the conventional one, a more excellent sealing property can be exhibited, and the inflow of air from the outside and the leakage of fluid to the outside can be very effectively prevented.

Further, in the engine mount 10, the rubber seal portion 72 is formed on the curved surface inside the step portion 26 of the tubular metal fitting 22 of the second mounting metal fitting 14, so that the second mounting metal fitting is formed. When the partition member 40 is assembled to the outer peripheral portion 14, the tubular metal member 22 of the second mounting member 14 and the first partition member 46 of the partition member form the rubber seal portion 72 at the outer edge portion of the step portion 26. They can be brought into direct contact with each other without any interposition, so that the deterioration of the sealability and the occurrence of rattling between the second tubular metal member 22 and the partition member 40 due to the settling of the rubber seal portion 72 or the like. Can be effectively prevented.

Next, FIGS. 4 and 5 show another example of an automobile engine mount in which the seal structure according to the present invention is adopted. Such engine mount 80
Is an inner tubular metal fitting 82 and an outer tubular metal fitting 84 which are arranged substantially in parallel with each other at a predetermined distance in the radial direction and eccentric by a predetermined amount.
Have a structure in which they are connected by a rubber elastic body 85 interposed therebetween. Although not clearly shown in the drawing, the inner tubular metal fitting 82 and the outer tubular metal fitting 84 are attached to one of the vehicle body side and the power unit side, respectively, so that the power unit can be supported in a vibration-proof manner with respect to the vehicle body. ing. In such a mounted state, both the supporting load of the power unit and the main vibration load to be vibration-isolated are input in the substantially eccentric direction of the inner tubular metal fitting 82 and the outer tubular metal fitting 84, and the supporting load of the power unit is As a result, the rubber elastic body 85 is elastically deformed, and the eccentric amount of the inner tubular metal fitting 82 and the outer tubular metal fitting 84 is reduced.

More specifically, the inner cylindrical metal member 82 has a thick cylindrical shape, and is eccentric to the outer side in the radial direction by a predetermined distance so as to be substantially parallel and eccentric to the metal sleeve 8.
6 are provided.

The metal sleeve 86 has a thin, large-diameter cylindrical shape, and has a first window 88 and a second window 88 at a portion opposed to each other in a direction perpendicular to the axis with the inner tubular metal fitting 82 sandwiched in the eccentric direction. The window 90 is formed. Also, the second window 9
At the central portion in the circumferential direction of 0, a substantially channel-shaped contact metal fitting 9
In the state where 2 projects inward in the radial direction, the second window portion 90 is welded across the second window portion 90 in the axial direction. Further, the first window portion 88
A circumferential groove 94, which opens to the outer peripheral surface, is formed in the circumferential direction between the two edge portions on both sides in the circumferential direction of the first window portion 90 and the second window portion 90, respectively. Furthermore, the orifice forming rubber 95 is vulcanized and adhered to the outer peripheral surface of the circumferential groove 94, as in the conventional case, and the orifice forming rubber 95 causes a recess extending in the circumferential direction on the outer peripheral surface of the circumferential groove 94. A groove 97 is formed.

A rubber elastic member 85 is interposed between the inner tubular member 82 and the metal sleeve 86, and the rubber member 85 elastically connects the inner tubular member 82 and the metal sleeve 86. There is. This rubber elastic body 85
Has an approximately thick-walled cylindrical shape as a whole, and its inner and outer peripheral surfaces are formed as an integrally vulcanized molded product which is vulcanized and adhered to the inner tubular member 82 and the metal sleeve 86. A thin rubber seal portion 87 is formed on the outer peripheral surface of the metal sleeve 86.
Are integrally formed with the rubber elastic body 85.

On the side where the separation distance between the inner tubular member 82 and the metal sleeve 86 in the rubber elastic body 85 in the eccentric direction is small (the side where the second window portion 90 is located), the second side of the metal sleeve 86 is formed. A recess 96 that opens to the outer peripheral surface is formed through the window portion 90. Further, between the bottom of the recess 96 and the inner tubular member 92, a lightening hole 98 that penetrates in the axial direction is formed along the bottom surface of the recess 96.

The bottom wall portion of the recess 96 is thinned by the lightening hole 98, so that the flexible film 100 is easily deformed. Further, the lightening hole 98 divides the rubber elastic body 85 into substantially two eccentric directions of the inner tubular metal member 82 and the metal sleeve 86, and the rubber elastic body 85 is elastically deformed when a power unit supporting load is input. At this time, generation of tensile stress in the rubber elastic body 85 is reduced or prevented.

On the other hand, on the side of the rubber elastic body 85 where the separation distance between the inner cylindrical metal fitting 82 and the metal sleeve 86 in the eccentric direction is large (the side where the first window portion 88 is located), the first of the metal sleeve 86 is formed. A pocket portion 102 that opens to the outer peripheral surface through the window portion 88 is formed. That is, in the pocket portion 102, the wall portions on both sides in the mount circumferential direction and both sides in the axial direction are both configured by the rubber elastic body 85.

Further, a stopper portion 103 is provided in the pocket portion 102 from the bottom of the pocket portion 102 to the outer tubular metal member 8.
It is made to project at a predetermined height toward the 4 side.
The stopper portion 103 has one end attached to the inner tubular metal fitting 82 and a supporting metal fitting 104 extending toward the outer tubular metal fitting 84 by a predetermined dimension, and a plate-shaped stopper metal fitting welded to the other end of the supporting metal fitting 104. And 106 are covered with a rubber elastic body 85. As a result, when a large load is input, the stopper portion 103 is brought into contact with the outer tubular metal fitting 84 side, and the relative displacement amount of the inner tubular metal fitting 82 and the outer tubular metal fitting 84 is limited, preventing an excessive displacement of the power unit. At the same time, excessive deformation of the rubber elastic body 85 can be prevented.

Then, the inner tubular member 82 and the metal sleeve 86.
In the eccentric direction, the recess 96 and the pocket 102 located on both sides of the rubber elastic body 85 sandwich the metal sleeve 8
6, the groove 97 formed on the outer peripheral surface of the peripheral groove 94 formed across the first window portion 88 and the second window portion 90 communicates with each other.

Thus, the integrally molded vulcanization product in which the rubber elastic body 85 is vulcanized and adhered to the inner tubular metal fitting 82 and the metal sleeve 86 is further fitted with the outer tubular metal fitting 84. The outer peripheral surface of the metal sleeve 86 is fitted and fixed by drawing or the like. As a result, the pocket 102 and the opening of the recess 96 are covered, and the pressure receiving chamber 10 as a fluid chamber in which a predetermined non-compressible fluid is sealed inside.
8 and the equilibrium chamber 110 are formed, and the circumferential groove 94 is formed.
And the concave groove 97 is covered, and the pressure receiving chamber 108 and the equilibrium chamber 11 are covered.
An orifice passage 112 that connects the 0s to each other is formed.

That is, in the pressure receiving chamber 108, the peripheral wall portion is constituted by the rubber elastic body 85, and the vibration input in the main vibration input direction (the vertical direction in FIGS. 4 and 5) between the inner and outer cylindrical metal fittings 82, 84. At times, internal pressure fluctuations are generated based on the elastic deformation of the rubber elastic body 85, while the bottom wall portion of the equilibrium chamber 110 is composed of the flexible film 100. The change in volume is allowed based on the deformation of 100. In this embodiment, in order to advantageously obtain the vibration damping effect based on the resonance action of the fluid, the pressure receiving chamber 108 and the equilibrium chamber 1
As the fluid to be filled in 10, the same fluid as in the first embodiment will be adopted.

Thus, in the engine mount having the above-described structure, when the vibration in the main vibration input direction is input under the mounted state, the pressure receiving chamber 108 and the equilibrium chamber 1
By causing relative internal pressure fluctuation during 10,
A fluid flow is generated through the orifice passage 112, and a predetermined vibration damping effect is exhibited based on the resonance action of the fluid. In this embodiment, the length, cross-sectional area, etc. of the orifice passage 112 are tuned so that a high damping effect with respect to low-frequency vibration is exhibited based on the resonance action of the fluid flowing through the orifice passage 112.

By the way, even in the engine mount 80 having such a structure, as in the above-described embodiment, the fluid is enclosed in the fluid chambers (the pressure receiving chamber 108 and the equilibrium chamber 110) by, for example, integral vulcanization. This can be done by, for example, assembling the outer tubular metal fitting 84 to the molded product in a fluid. At that time, the rubber seal portion 87 provided on the outer peripheral surface of the metal sleeve 86 is attached to the metal sleeve 86 and the outer surface. The pressure is clamped by the tubular metal fitting 84 so that the two members 84, 86 can be sealed.

Then, as shown in FIG. 6, which shows a part of the state before the assembling process (octagonal drawing process) of the outer cylinder fitting 84 to the integrally vulcanized molded product of the engine mount 80, as shown in FIG. In particular, on the contact surface of the rubber seal portion 87 with the outer cylinder fitting 84, the rubber seal portion 7 in the first embodiment is formed.
Two crests having a structure similar to that provided in 2 are formed adjacent to each other in the state of being close to each other. That is, these two peaks are formed in the fluid chamber (pressure receiving chamber 1
08 and the equilibrium chamber 110), and is composed of an outer ridge portion 74 having a high protruding height and an inner ridge portion 76 having a low protruding height arranged in the vicinity of the fluid chamber. The inclination on the fluid chamber side is larger than the inclination on the opposite side. A protrusion 78 having a height lower than that of the outer mountain portion 74 is integrally formed on the inclined surface of the outer mountain portion 74 opposite to the fluid chamber side.

Therefore, in the engine mount 80 according to the present embodiment, the outer ridge portion 74 of the rubber seal portion 87 is kept under the condition that the outer tubular metal fitting 84 and the metal sleeve 86 are assembled.
The inner mountain portion 76 and the inner mountain portion 76 are tilted toward the fluid chamber side so as to be overlapped with each other, and compressed between the outer cylindrical metal fitting 84 and the metal sleeve 86 with a large clamping force.
Since the projection 78 provided on the No. 4 is also compressed by the metal fittings 84 and 86, the rubber seal portion 87 can be pinched between the outer metal fitting 84 and the metal fitting sleeve 86. is there. As is apparent from this, in this embodiment, the metal sleeve 86 constitutes the first member, and the outer tubular metal fitting 84 constitutes the second member.

Therefore, also in the present embodiment, as in the case of the above-described first embodiment, the excellent sealing property can be extremely effectively ensured regardless of the fluctuation of the internal pressure of the fluid chamber.

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

For example, in the above-described embodiment, the present invention is applied to the engine mount having a structure including the pressure receiving chambers 52 and 108 and the equilibrium chambers 54 and 110 which are communicated with each other through the orifice passages 62 and 112. However, the present invention can be similarly applied to a device having a single fluid chamber, a device having three or more fluid chambers and a plurality of orifice passages, and the like. .

In the above embodiment, the present invention is applied to a fluid-filled type vibration-proof support body in which a low-viscosity fluid is filled in a fluid chamber to obtain a vibration-proof effect based on the resonance action of the fluid. Although an example is shown, the present invention is also applicable to a fluid-filled type vibration-proof support including a fluid chamber in which a high-viscosity fluid capable of exhibiting a damping effect based on a shear shearing action at the time of vibration input is filled. Can be applied.

Further, a fluid filled type vibration damping device including a first member and a second member which are assembled with each other to define at least a part of a fluid chamber in which a predetermined incompressible fluid is sealed. In the support, a rubber seal portion is provided on an assembly surface of the first member with respect to the second member, and the rubber seal portion is clamped between the first member and the second member. Therefore, the shapes and specific structures of the first and second members are not limited to those in the above-described embodiment, as long as the sealing between the two members can be performed. Of course not.

In addition, in the above-mentioned embodiment, a specific example of the present invention applied to an engine mount for an automobile is shown. However, the present invention is not limited to the above, but may be applied to a suspension bush, a member mount or the like for an automobile, or other than an automobile. Any of them can be similarly applied to the fluid-filled type vibration-damping support in various devices.

Although not listed one by one, the present invention is
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 within the scope of the present invention, without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a longitudinal cross-sectional explanatory view showing an example of a fluid-filled type vibration-damping support adopting a seal structure according to the present invention.

2 is an exploded explanatory view for explaining a method of assembling the fluid filled type vibration damping support body shown in FIG. 1. FIG.

FIG. 3 is an enlarged sectional explanatory view of a main part in FIG. 2;

FIG. 4 is a vertical cross-sectional explanatory view showing another example of a fluid-filled type vibration-damping support in which the seal structure according to the present invention is adopted.

5 is an explanatory view corresponding to a cross section taken along the line AA in FIG.

FIG. 6 is an enlarged cross-sectional explanatory view of a main part of the fluid-filled type vibration-damping support body shown in FIG. 4, showing a state before the assembling process of the outer tubular metal member to the integrally vulcanized molded product.

FIG. 7 is an enlarged cross-sectional explanatory view of an essential part showing an example of a rubber seal part provided in a conventional fluid-filled type vibration-damping support.

FIG. 8 is a view corresponding to FIG. 7, showing another example of the rubber seal portion provided in the conventional fluid filled type vibration damping support body.

FIG. 9 is a view corresponding to FIG. 7 showing still another example of the rubber seal portion provided in the conventional fluid-filled type vibration-damping support.

[Explanation of symbols]

 10,80 Engine mount for automobile 12 First mounting bracket 14 Second mounting bracket 16,85 Rubber elastic body 40 Partition member 42,100 Flexible membrane 50 Fluid chamber 52,108 Pressure receiving chamber 54,110 Equilibrium chamber 62, 112 Orifice passage 72,87 Rubber seal part 74 Outer mountain part 76 Inner mountain part 82 Inner tube fitting 84 Outer tube fitting 86 Metal sleeve

Claims (5)

[Claims] 1. A fluid-filled type vibration-damping support comprising a first member and a second member, which are assembled with each other to define at least a part of a fluid chamber in which a predetermined incompressible fluid is enclosed. A rubber seal portion is provided on an assembly surface of the first member with respect to the second member, and the rubber seal portion is attached to the first member and the second member in a state in which the two members are assembled to each other. The member has a seal structure in which the two members are sealed by being pinched between the two members, and the rubber seal portion projects at a predetermined height from the contact surface with the second member. A plurality of peaks are integrally formed in a state in which they are arranged in a direction away from the fluid chamber, and projecting heights of the plurality of peaks gradually increase as the protrusions are separated from the fluid chamber. And each of them When the first member and the second member are assembled together, the plurality of peaks are formed in the fluid chamber. A fluid-filled type protection, characterized in that the rubber seal portion can be pinched between the first member and the second member while being tilted toward the fluid chamber side in order from the one separating from the chamber. Seal structure for vibration support. 2. A protrusion having a height lower than that of the outermost mountain portion is provided on an inclined surface of the outermost mountain portion farthest away from the fluid chamber of the plurality of mountain portions, the inclined surface being opposite to the fluid chamber. When the rubber seal portion is clamped between the first member and the second member in a state where the outermost mountain portion is tilted to the fluid chamber side, the protrusion is formed by the two members. The seal structure for a fluid-filled type vibration-proof support according to claim 1, wherein the seal structure is capable of being crushed by. 3. The plurality of ridges are arranged close to each other on the contact surface of the rubber seal portion with the second member, and are tilted toward the fluid chamber,
The seal structure in a fluid filled type vibration damping support according to claim 1 or 2, wherein the seal structure overlaps with each other. 4. The fluid-filled type vibration-damping support is supported by the first and second mounting members, a rubber elastic body connecting them, and the second mounting member, and is perpendicular to the vibration input direction. And a partition member that is formed on the side of the first mounting member, and a part of the wall portion is formed by the rubber elastic body, and a predetermined incompressibility that causes fluctuations in internal pressure when vibration is input. A predetermined non-compressive chamber that is formed on the opposite side of the pressure receiving chamber that encloses the fluid and the pressure receiving chamber, and has a part of the wall portion that is made of a flexible film, and the volume change is allowed based on the deformation. Equilibrium chamber for enclosing a volatile fluid, wherein the second mounting member and the partition member are configured as the first and second members, and the mounting surface of the second mounting member to the partition member The fluid seal according to any one of claims 1 to 3, wherein the rubber seal portion having the mountain portion is formed in the rubber seal portion. Sealing structure for the input type vibration-proof support 5. A rubber elastic body in which the fluid-filled type vibration-damping support is provided with inner and outer tubular metal fittings, a recess provided between the inner and outer tubular metal fittings, and opening toward the outer peripheral surface, and the inner tubular body. A metal sleeve which is located between the metal fitting and the outer metal fitting, and which is connected to the inner metal fitting by the rubber elastic body and has a window portion corresponding to the recess of the rubber elastic material, and the metal sleeve. A fluid chamber for enclosing a predetermined incompressible fluid, which is formed by covering the recess of the rubber elastic body opened to the outer peripheral surface through the window portion of the outer sleeve with the outer sleeve. 4. The outer cylinder fitting is configured as the first and second members, and the rubber seal portion having the mountain portion is formed on an assembly surface of the metal sleeve with respect to the outer cylinder fitting. A seal structure in the fluid filled type vibration damping support according to any one of 1.