JP3412500B2 - Anti-vibration support device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting a vibration body such as a vehicle engine on a support body such as a vehicle body while damping the vibration, and more particularly to an improvement of a seal member.

[0002]

2. Description of the Related Art As a prior art of this kind, there is one described in, for example, Japanese Patent Laid-Open No. 9-250590.

That is, a schematic view of a vibration isolation support device as a prior art will be described with reference to FIG.
Has a flat plate-shaped fixing member 2 fixed to the vibrating body side of an engine or the like, and a bolt 2a for attachment to the engine is integrally provided on the upper surface of the fixing member 2.
The central portion of the upper surface of the support elastic body 3 is vulcanized and adhered to the back surface of the fixing member 2.

The supporting elastic body 3 is a rubber-like elastic body having a thick-walled circular shape whose central portion is raised above the peripheral edge portion, and its outer peripheral surface is vulcanized and adhered to the inner peripheral surface of the upper end portion of the cylindrical member 4. Has been done. The cylindrical member 4 is fixed to the inner peripheral surface of the outer cylinder 7 together with the upper spacer 5 for fixing the seal member, the lower spacer 6 for supporting the leaf spring, and the edge portion 10a of the yoke 10A of the electromagnetic actuator 10. ing.

The electromagnetic actuator 10 includes a cylindrical yoke 10A made of iron, an exciting coil 10B fixed on the upper surface of the yoke 10A with its axis oriented vertically, and a yoke 10A.
Permanent magnet 1 fixed with the poles facing up and down at the center of the upper surface of the
0C, a mounting bolt or the like (not shown) is fixed to the lower end surface of the yoke 10A, and the bolt is used to fix to the support side of the vehicle body or the like.
A load sensor or the like (not shown) is interposed between the yoke 10A and the support in order to detect residual vibration required for vibration reduction control.

On the other hand, a movable member 11 is disposed above the electromagnetic actuator 10 so as to be vertically displaceable inside the outer cylinder 7 with a gap between the permanent magnet 10C and the permanent magnet 10C at a predetermined interval. . The movable member 11 is a member composed of a substantially disk-shaped partition wall forming member 11A and a substantially disk-shaped magnetic path forming member 11B made of iron, and the partition wall forming member 11A and the magnetic path forming member 11B. Is a columnar portion 11a protruding downward from the central portion of the back surface of the partition wall forming member 11A located farther from the electromagnetic actuator 10,
Cylindrical portion 1 formed in the central portion of the magnetic path forming member 11B located closer to the electromagnetic actuator 10 and protruding toward the upper surface side
It is integrated by being pressed into 1b. A peripheral edge of the lower surface (the surface on the side of the electromagnetic actuator 10) of the magnetic path forming member 11B is made of a ring-shaped rubber-like elastic body for preventing a direct collision between the magnetic path forming member 11B and the electromagnetic actuator 10. The stopper member 11C is fixed.

The tip of the cylindrical portion 11b abuts against the back surface of the partition wall forming member 11A.
A ring-shaped continuous constricted portion 12 is formed between the partition wall forming member 11A and the magnetic path forming member 11B. A leaf spring 13 made of spring steel is housed in the constricted portion 12 to elastically support the movable member 11. Then, the upper surface of the inner peripheral portion of the leaf spring 13 has the partition wall forming member 11
A central portion of the rear surface of A supports a thick portion 11c formed so as to surround the tip of the cylindrical portion 11b, and the outer peripheral rear surface of the leaf spring 13 has a ring shape formed on the inner peripheral surface of the lower spacer 6. The movable member 11 is elastically supported by the outer cylinder 7 via the leaf spring 13 by the supporting portion 6a composed of a continuous convex portion.

Further, the upper surface of the partition wall forming member 11A is flat, and a fluid chamber 15 is formed by the upper surface, the lower surface of the support elastic body 3 and the inner peripheral surface of the cylindrical member 4, and the fluid chamber 15 is formed. A fluid is enclosed inside. However, the fluid chamber 15
In order to prevent the fluid from leaking to the waist 12 side,
A seal member 16 is fixed between the outer peripheral surface of the partition wall forming member 11A of the movable member 11 which moves up and down and the inner peripheral surface of the upper spacer 5.

That is, the seal member 16 is a ring-shaped rubber-like elastic body, the inner peripheral surface of which is fixed to the outer peripheral surface of the partition wall forming member 11A by vulcanization adhesion, and the outer peripheral surface of which is the upper spacer 5. It is fixed by vulcanization adhesion to the inner peripheral surface of, and its elastic deformation allows relative displacement of the movable member 11 in the vertical direction with respect to the upper spacer 5 and the outer cylinder 7.

In the vibration isolating support device 1 having such a structure, the magnetic force generated by the electromagnetic actuator 10 is changed by the drive signal supplied from the controller (not shown), and the movable member 11 is displaced in the vertical direction to cause the fluid chamber to move. Since the volume of 15 changes, and the change in volume acts on the expansion direction spring of the support elastic body 3, an active support force is generated between the fixing member 2 and the outer cylinder 7. Therefore, the electromagnetic actuator 10
By appropriately generating a drive signal to be supplied to the outer cylinder 7 side by the adaptive algorithm or the like, the vibration transmitted to the outer cylinder 7 side from the fixed member 2 side can be canceled or reduced by the supporting force. It can be reduced.

[0011]

By the way, the movable member 1
Since the seal member 16 also elastically deforms with the displacement of 1, the deformation amount may be reduced in order to ensure durability. Therefore, the wall thickness is increased to increase the effective pressure receiving area of the seal member 16 (the partition wall forming member). The area of the upper surface of 11A and the area of the seal member 16 which is continuously displaced from the outer periphery of the upper surface in the vertical direction together with the partition wall forming member 11A may be set to be large).

However, in order to simply increase the effective pressure receiving area of the seal member 16, if the inner wall of the partition wall forming member 11A and the outer wall of the upper spacer 5 are formed to have substantially the same wall thickness, the movable member 11 can be formed. Is displaced in the vertical direction, the inner peripheral portion fixed to the partition wall forming member 11A shown by symbol A in FIG.
_{The value of 1} is as small as the area of the upper surface of the partition wall forming member 11A, and it is difficult for the vibration isolating support device 1 to generate a large supporting force.

The seal member 11 is a partition wall forming member 1.
Since the inner peripheral portion fixed to 1A is elastically deformed, if the elastic deformation is repeatedly performed for a long period of time, the fixing force to the partition wall forming member 11A is reduced, and there is a problem in terms of durability of the seal member 11.

The present invention has been made by paying attention to the unsolved problem of the preceding anti-vibration supporting device, and it is possible to generate a large supporting force by setting a large effective pressure receiving area. Moreover, it is an object of the present invention to provide an anti-vibration support device that can obtain a seal member having improved durability.

[0015]

In order to achieve the above object, the invention according to claim 1 provides a supporting elastic body, a first member to which one end side of the supporting elastic body is fixed, and the supporting elastic body. A second member having the other end fixed, a fluid chamber defined by the support elastic body and the second member and having a fluid enclosed therein, and a fluid chamber disposed inside the second member and having a fluid chamber A movable member that displaces in a direction that changes the volume; an electromagnetic actuator that is supported by the second member and that displaces the movable member so as to be located on the opposite side of the fluid chamber with the movable member interposed therebetween; A leaf spring elastically supporting the movable member so that the member faces the electromagnetic actuator, an inner peripheral portion fixed to the outer periphery of the movable member, and an outer peripheral portion fixed to the second member. The electromagnetic actuator In vibration-damping support device and a sealing member made of an elastic body that prevents the fluid leakage, the seal member, among which is fixed to the outer periphery of the movable member
The thickness from the peripheral portion to the outer peripheral portion fixed to the second member is formed to be substantially uniform, and an annular recess portion whose thickness is locally reduced is provided on the outer peripheral side closer to the second member side. Formed.

According to a second aspect of the invention, a supporting elastic body and a first member to which one end side of the supporting elastic body is fixed,
A second member to which the other end side of the support elastic body is fixed, a fluid chamber defined by the support elastic body and the second member and having a fluid enclosed therein, and arranged inside the second member. And a movable member that is displaced in a direction in which the volume of the fluid chamber is changed, and an electromagnetic wave that is supported by the second member and that displaces the movable member so as to be located on the opposite side of the fluid chamber with the movable member interposed therebetween. An actuator, a leaf spring that elastically supports the movable member so that the movable member faces the electromagnetic actuator, an inner peripheral portion is fixed to an outer periphery of the movable member, and an outer peripheral portion is fixed to a second member. And a sealing member made of an elastic body that prevents leakage of fluid from the fluid chamber to the electromagnetic actuator, the sealing member being located in front of an outer peripheral portion fixed to the second member. Toward the inner peripheral portion which is fixed to the outer periphery of the movable member was formed by gradually increasing the thickness.

According to a third aspect of the present invention, in the vibration-damping support device according to the first or second aspect, the second member is formed with an annular protrusion that protrudes toward the outer periphery of the movable member. The outer peripheral portion of the seal member was fixed to the entire circumference of the protruding portion.

According to a fourth aspect of the invention, in the vibration-damping support device according to any of the first to third aspects, the fixing surface of the second member to which the outer peripheral portion of the seal member is fixed has a curved shape. Formed.

According to a fifth aspect of the present invention, in the vibration-damping support device according to any one of the first to fourth aspects, an annular shape is formed on the movable member and protrudes from the outer periphery of the movable member in the displacement direction of the movable member. The rib was formed, and the inner peripheral portion of the seal member was fixed to the entire circumference of the rib.

According to a sixth aspect of the present invention, in the vibration-damping support device according to any one of the first to fifth aspects, the fixing surface of the outer periphery of the movable member, to which the inner peripheral portion of the seal member is fixed,
It was formed into a curved shape.

According to a seventh aspect of the invention, in the vibration-damping support device according to any one of the first to sixth aspects, a seal member fixed to the outer periphery of the movable member is provided in the fluid chamber of the movable member. The extension was provided so as to cover substantially the entire area of the facing surfaces.

Further, the invention of claim 8 is the same as claim 1.
In the anti-vibration support device according to any one of 1 to 7, the electromagnetic actuator includes a permanent magnet that generates a magnetic force that attracts the movable member, and a forward and reverse direction with respect to a magnetic force direction of the permanent magnet according to a drive signal. An exciting coil for displacing the movable member by generating an electromagnetic force, the electromagnetic force of the exciting coil does not occur, and the movable member balances the supporting force of the leaf spring and the magnetic force of the permanent magnet. The fixed positions of the outer periphery of the movable member and the inner periphery of the second member are set so that the seal member does not elastically deform when displaced to the position.

[0023]

According to the invention of claim 1, when the movable member is displaced, the elastic deformation amount of the seal member at the position where the recessed portion is provided becomes larger than that of the other region, and the region inside the recessed portion is large. Moves along with the upper part of the movable member in the direction of changing the volume of the fluid. Therefore, a large effective pressure receiving area, which is the sum of the upper area of the movable member facing the fluid chamber and the area of the seal member inside the recess, becomes a large volume change of the fluid chamber. The vibration supporting device can generate a large active supporting force.
Further, the recessed portion that is repeatedly elastically deformed is separated from the outer peripheral portion and the inner peripheral portion of the seal member fixed to the outer periphery of the second member and the movable member, so that large stress is not applied to the outer peripheral portion and the inner peripheral portion. Therefore, the fixing force of the seal member can be maintained for a long period of time.

According to the second aspect of the present invention, when the movable member is displaced, the elastic deformation amount of the seal member on the outer peripheral side where the wall thickness is thin becomes larger than that on the inner peripheral side, and from this position The region on the side moves together with the upper part of the movable member in a direction that changes the volume of the fluid. Therefore, the upper area of the movable member facing the fluid chamber and the area of the inner peripheral side seal member are combined to provide a large effective pressure receiving area, and the volume change of the fluid chamber can be increased. The device can also generate large active support forces.

Further, according to the invention of claim 3, the effect of claim 1 or 2 can be obtained, and the outer peripheral portion of the seal member is fixed to the entire circumference of the annular projection provided on the second member. Therefore, the fixing area of the outer peripheral portion of the seal member with respect to the second member is increased, and the durability of the seal member is improved.

Further, the invention according to claim 4 can obtain the effect according to any one of claims 1 to 3, and the fixing surface of the second member to which the outer peripheral portion of the seal member is fixed has a curved shape. Since the outer peripheral portion is elastically deformed, the stress applied to the outer peripheral portion is dispersed, and the fixing force between the outer peripheral portion of the seal member and the second member is further increased.

Further, the invention according to claim 5 can obtain the effect according to any one of claims 1 to 4, and at the same time, the movable member has an annular shape protruding from the outer periphery in the displacement direction of the movable member. Since the rib is formed and the inner peripheral portion of the seal member is fixed to the entire circumference of the rib, the fixing area of the seal member to the movable member is increased, and the durability of the seal member is improved.

Further, the invention according to claim 6 can obtain the effect according to any one of claims 1 to 5, and the fixing surface on the outer periphery of the movable member to which the inner peripheral portion of the seal member is fixed is a curved surface. Since it is formed in a shape, even if the inner peripheral portion is elastically deformed, the stress applied to the inner peripheral portion is dispersed, and the fixing force between the inner peripheral portion of the seal member and the movable member is further increased.

The invention according to claim 7 can obtain the effect according to any one of claims 1 to 6, and a seal member fixed to the outer periphery of the movable member is provided in the fluid chamber of the movable member. Since it is provided so as to extend so as to cover almost the entire area of the surface opposed to, the fixing area of the seal member to the movable member is further increased. Further, when the electromagnetic actuator generates heat, this heat may be transferred to the fluid in the fluid chamber via the movable member and cause the fluid to boil. However, it is necessary to cover substantially the entire surface of the movable member facing the fluid chamber. Since the seal member is provided as an extension, the extended portion functions as a heat blocking member that prevents heat transfer, and thus it is possible to prevent boiling of the fluid.

Further, the invention of claim 8 is the same as claim 1.
The effect described in any one of 1 to 7 can be obtained, and when the electromagnetic force of the electromagnetic actuator is not generated, the seal member is not elastically deformed, and the electromagnetic force of the electromagnetic actuator is generated to displace the movable member. Only at that time, the seal member is elastically deformed, and the elastic deformation amount of the entire seal member is reduced as compared with the conventional device, so that the durability of the seal member can be further improved.

[0031]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic side view of a vehicle to which an active vibration control device, which is an embodiment of a vibration isolation support device according to the present invention, is applied.

First, the structure will be described. From the suspension member or the like through an anti-vibration support device (active engine mount) 20 by which an engine (vibrating body) 17 can generate an active supporting force according to a drive signal. It is supported by the constituted vehicle body (support) 18. In addition, between the engine 17 and the vehicle body 18, actually, in addition to the anti-vibration support device 20, a plurality of engine mounts that generate a passive supporting force according to the relative displacement between the engine 17 and the vehicle body 18 are also interposed. ing. As a passive engine mount, for example, a normal engine mount that supports the load with a rubber-like elastic body,
A known fluid-filled mount insulator or the like in which a fluid is enclosed in a rubber-like elastic body so that a damping force can be generated can be applied.

Next, FIG. 2 shows a concrete structure of the vibration-damping support device 20 according to the first embodiment. The device case 43 has an outer cylinder 34 and an orifice-constituting member 3.
6, the inner cylinder 37, mounting components such as the support elastic body 32 are built in, and a movable member 78 elastically supported while forming a part of the partition wall of the fluid chamber 84 is formed in the lower portion of these mounting components. The electromagnetic actuator 52 that displaces in the direction in which the load changes and the load sensor 64 that detects the vibration state of the vehicle body member 28 are incorporated.

That is, the anti-vibration support device 20 of this embodiment
Includes an engine-side connecting member 30 having a connecting bolt 30a fixed upward. A hollow cylindrical body 30b having an inverted trapezoidal cross section is fixed to a lower portion of the engine side connecting member 30.

On the lower surface side of the engine side connecting member 30, the lower side of the engine side connecting member 30 and the hollow cylindrical body 30.
The support elastic body 32 is fixed by vulcanization adhesion so as to cover the periphery of b. The support elastic body 32 is a thick-walled, substantially cylindrical elastic body that gently inclines downward from the central portion toward the outer peripheral portion, and has a hollow portion 32a having a mountain-shaped cross section on its inner surface. The supporting elastic body 3 having a thin shape
The lower end of 2 has a shaft center (hereinafter referred to as a mount shaft) P ₁
Is coupled by vulcanization adhesion to the inner peripheral surface of the orifice constituting member 36 that is coaxial with the hollow cylindrical body 30b and faces the vibrating body supporting direction (in this case, the vertical direction).

The orifice-constituting member 36 is a member in which a small-diameter tubular portion 36c is continuously formed between an upper-end tubular portion 36a and a lower-end tubular portion 36b having the same outer diameter, and an annular recess is provided on the outer periphery. Although not shown, an opening is formed in the small-diameter cylindrical portion 36c, and the inside and outside of the orifice component member 36 communicate with each other through this opening.

The outer cylinder 3 is provided outside the orifice component 36.
4, the outer cylinder 34 has an inner diameter equal to the outer diameters of the upper end cylinder portion 36a and the lower end cylinder portion 36b of the orifice component 36, and the axial length of the outer cylinder 34 is the orifice component 36. It is a cylindrical member set to the same size. Further, an opening 34a is formed in the outer cylinder 34, and the outer periphery of the diaphragm 42 made of a rubber thin film elastic body is coupled to the opening edge of the opening 34a to close the opening 34a, It bulges toward the inside of the outer cylinder 34.

When the outer cylinder 34 having the above-described structure is fitted onto the orifice component 36 so as to surround the annular recess, an annular space is defined in the circumferential direction between the outer cylinder 34 and the orifice component 36, and the annular space is formed. The diaphragm 42 is arranged in a bulged state in the space.

The inner cylinder 37 fitted inside the orifice constituting member 36 is the small-diameter cylindrical portion 3 of the orifice constituting member 36.
The minimum diameter cylindrical portion 37a is formed to have a diameter smaller than 6c, and the annular portions 37b and 37c are formed at the upper and lower ends of the minimum diameter cylindrical portion 37a so as to extend radially outward. Ring part 3 on the upper side
7b is a small-diameter cylindrical portion 3 having an outer peripheral diameter of the orifice-constituting member 36.
6c, slightly smaller in diameter than the lower annular portion 36c
Has a diameter smaller than that of the lower end tubular portion 36b of the orifice forming member 36, and has a second opening 37d formed in the minimum diameter tubular portion 37a.

The device case 43 has an upper end crimping portion 43a having a circular opening having a diameter smaller than the outer diameter of the upper end tubular portion 36a, and the shape of the case body continuous with the upper end crimping portion 43a. Is a member having a cylindrical shape in which the inner peripheral diameter is the same as the outer peripheral diameter of the outer cylinder 34 and continues to the lower end opening (the lower end opening is shown by the broken line in FIG. 2).

Then, the outer cylinder 34 in which the supporting elastic body 32, the orifice component 36, the inner cylinder 37 and the diaphragm 42 are integrated is fitted into the inside of the lower end opening of the apparatus case 43, and the lower surface of the upper end crimped portion 43a. By bringing the outer cylinder 34 and the upper end of the orifice forming member 36 into contact with each other, they are arranged in the upper portion of the device case 43.

Here, an air chamber 42c is defined in a portion surrounded by the inner peripheral surface of the device case 43 and the diaphragm 42, and an air hole 43a is formed at a position facing the air chamber 42c. Air chamber 42c through this air hole 43a
And the atmosphere are in communication.

A cylindrical spacer 70 is fitted in the lower part of the device case 43, a movable member 78 is arranged in the upper part of the spacer 70, and an electromagnetic actuator 52 is arranged in the lower part of the spacer 70. Has been done. That is, the spacer 70 is a member obtained by vulcanizing and adhering the diaphragm 70c made of a thin elastic film made of rubber between the upper cylinder 70a and the lower cylinder 70b.

The electromagnetic actuator 52 has a cylindrical outer yoke 52a, an annular exciting coil 52b embedded in the upper end surface side of the yoke 52a, and a permanent magnet with a magnetic pole fixed vertically in the center of the upper surface of the yoke 52a. The yoke 52a is composed of a magnet 52c, and the yoke 52a is divided into two parts in the vertical direction. The upper yoke member 53a and the lower yoke member 53b.
The lower outer periphery of the upper yoke member 53a and the upper outer periphery of the lower yoke member 53b are scraped off to form a recess 52d that is continuous in the circumferential direction. And
The diaphragm 70c of the spacer 70 has the recess 52d.
An air chamber 70d is formed in a portion surrounded by the diaphragm 70c and the inner peripheral surface of the device case 43. The air hole 43b is located at a position facing the air chamber 70d.
Is formed, and the air chamber 7 is formed through this air hole 43b.
0d communicates with the atmosphere. A weight sensor 64 is interposed between the lower surface of the yoke 52a and the lid member 62 having the vehicle body side connecting bolt 60 in order to detect residual vibration required for vibration reduction control. The load sensor 64
As the element, a piezoelectric element, a magnetostrictive element, a strain gauge, or the like can be applied, and the detection result of this sensor is as shown in FIG.
The residual vibration signal e is supplied to the controller 25.

On the other hand, in the upper part of the spacer 70, a seal ring 72 for fixing a seal member, which has an inner peripheral portion projecting inwardly in a curved shape, and a leaf spring 82 described later are provided.
A support ring 74 for supporting the outer periphery of the free end from below,
The gap holding ring 76 that sets the gap H between the permanent magnet 52c of the electromagnetic actuator 52 and the movable member 78.
Are arranged coaxially in the vibrating body supporting direction P ₁ , and a movable member 78 is arranged inside these rings so as to be vertically displaceable.

The movable member 78 is a member composed of a partition wall forming member 78A having an outer disk shape and a magnetic path forming member 78B having a disk shape larger than the partition wall forming member 78A. And a bolt hole 80a is formed in the shaft center of the partition wall forming member 78A located at a far side.
The movable member bolt 80 penetrating the magnetic path forming member 78B close to the electromagnetic actuator 52 is screwed into the bolt hole 80a, whereby the partition wall forming member 78A and the magnetic path forming member 7 are formed.
8B is integrally connected.

Partition wall forming member 78A and magnetic path forming member 78
A ring-shaped continuous constricted portion 79 is defined between B, and a leaf spring 82 for elastically supporting the movable member 78 is accommodated in the constricted portion 79. That is, the leaf spring 82 is a disk-shaped member having a hole formed in the center thereof, and the inner peripheral portion of the leaf spring 82 is supported by the free end of the bottom of the back surface center portion of the partition wall forming member 78A. A spring support portion 74a of a support ring 74 supports the outer peripheral portion of the free end 82 from the lower end so that the movable member 78 can be supported by the device case 4 as shown in FIG.
3 is elastically supported by a leaf spring 82.

In the partition wall forming member 78A, the wall thickness of the partition wall portion 80c facing the fluid chamber 84 is reduced so that the partition wall portion 80c is formed.
Is a member in which an annular rib 80b protruding upward from the outer periphery of the rib 80b is formed. As shown in FIG. 3, the outer periphery and the top of the rib 80b are formed in a curved shape. Then, the upper surface of the partition wall forming member 78, the lower surface of the support elastic body 32, and the inner cylinder 37.
A fluid chamber 84 is formed with the inner peripheral surface of the, and the fluid is enclosed in the fluid chamber 84.

Here, in order to prevent the fluid from leaking from the fluid chamber 84 to the side of the constricted portion 79 accommodating the leaf spring 82, between the outer circumference of the partition wall forming member 78A and the inner circumference of the seal ring 72. A ring-shaped seal member 86 made of a rubber-like elastic body is fixed, and elastic deformation of the seal member 86 allows relative displacement of the movable member 78 with respect to the seal ring 7 and the device case 43 in the vertical direction. There is.

That is, as shown in FIG. 3, the outer peripheral portion 86a of the seal member 86 is fixed so as to cover the entire inner peripheral surface formed in the curved shape of the seal ring 72, and the inner peripheral portion 86b thereof is curved. The rib 80b formed in a shape is fixed so as to cover the outer peripheral surface and the top and inner peripheral surfaces. Further, the partition wall portion 80 of the rib 80b is provided on the inner peripheral portion 86b of the seal member 86.
An extended seal portion 86c covering the upper surface of c is continuously formed.

Further, the outer peripheral portion 86a of the seal member 86
An annular recessed portion 86d is formed on the upper surface at a position closer to. When the electromagnetic force of the electromagnetic actuator 52 is not generated, the movable member 78 moves the leaf spring 82.
Neutral position (the yoke 52c and the magnetic path forming member 78) where the supporting force (reaction force that faces upward) of the permanent magnet 52c balances with the magnetic force of the permanent magnet 52c.
However, the seal member 86 is not elastically deformed when the movable member 78 is displaced to the neutral position described above, and the movable member 78 is displaced.
The fixing position is set with respect to the outer periphery of the partition wall forming member 78A and the inner peripheral face of the seal ring 72 so that the elastic deformation is caused when the is displaced upward or downward from the neutral position.

On the other hand, the exciting coil 52b of the electromagnetic actuator 52 is adapted to generate a predetermined electromagnetic force according to the drive signal y which is a current supplied from the controller 25. The controller 25 includes a microcomputer, necessary interface circuits, A / D converter, D / A
The vibration-proof support device 20 is configured to include a converter, an amplifier, a storage medium such as a ROM, a RAM, and the like, and an active supporting force that can reduce the vibration generated in the engine 17 is generated in the anti-vibration supporting device 20.
The drive signal y for the anti-vibration support device 20 is generated and output.

Here, as for the idle vibration and the muffled sound vibration generated in the engine 17, for example, in the case of a reciprocating four-cylinder engine, the engine vibration of the secondary component of the engine rotation is the vehicle body 1.
The main cause is that the vibration is transmitted to the vehicle 8. Therefore, if the drive signal y is generated and output in synchronization with the engine rotation secondary component, the vibration on the vehicle body side can be reduced. Therefore, in the present embodiment, an impulse signal is generated in synchronization with the rotation of the crankshaft of the engine 17 (for example, in the case of a reciprocating 4-cylinder engine, one impulse signal is generated each time the crankshaft rotates 180 degrees), and the reference signal x Pulse signal generator 19 for outputting as
Is provided, and the reference signal x is supplied to the controller 25.

Then, the controller 25, based on the residual vibration signal e and the reference signal x supplied, is a synchronous filtered which is one of the adaptive algorithms of the successive update type.
By executing the -XLMS algorithm, the drive signal y for the image stabilization support device 20 is calculated, and the drive signal y is output to the image stabilization support device 20.

Specifically, the controller 25 has an adaptive digital filter W with a variable filter coefficient W _i (i = 0, 1, 2, ..., I-1: I is the number of taps), and the latest The adaptive digital filter W at a predetermined sampling clock interval from the time when the reference signal x is input.
Of one of outputting a filter coefficient W _i in the order as the drive signal y, it is adapted to execute a process of appropriately updating the filter coefficient W _i of the adaptive digital filter W based on the reference signal x and the residual vibration signal e.

The updating formula of the adaptive digital filter W is F
The following equation (1) follows the iltered-X LMS algorithm. W _i (n + 1) = W _i (n) −μR ^T e (n) (1) Here, the terms with (n) and (n + 1) represent values at sampling times n and n + 1, μ is a convergence coefficient. Further, theoretically, the update reference signal R ^T is
The reference signal x is transferred to the electromagnetic actuator 5 of the anti-vibration support device 1.
2 is a value obtained by filtering the transfer function C between the load sensor 64 and the load sensor 64 with the transfer function filter C ^ modeled by the finite impulse response type filter. However, since the magnitude of the reference signal x is "1", the transfer function This coincides with the sum at the sampling time n of the impulse response waveforms when the impulse responses of the filter C ^ are generated one after another in synchronization with the reference signal x. Further, theoretically, the reference signal x is filtered by the adaptive digital filter W to generate the drive signal y. However, since the magnitude of the reference signal x is "1", the filter coefficients W _i are sequentially set. Even when it is output as the drive signal y, the same result is obtained as when the result of the filtering process is set as the drive signal y.

Next, the operation of this embodiment will be described. That is, when idle vibration or muffled sound vibration is generated in the engine 17, the controller 25 sends a reference signal x to the electromagnetic actuator 52 of the anti-vibration support device 20.
From the time when is input, the filter coefficient W _i of the adaptive digital filter W is sequentially supplied as the drive signal y at the sampling clock interval.

As a result, the drive signal y is applied to the exciting coil 52b.
Magnetic force is generated according to the magnetic field forming member 78B,
Since a constant magnetic force is already applied by the permanent magnet 52c, the magnetic force by the exciting coil 52b is already applied.
It can be considered to act to strengthen or weaken the magnetic force of c. As described above, when the magnetic force of the permanent magnet 52c is strengthened or weakened, the movable member 78 is displaced in both forward and reverse directions, and when the movable member 78 is displaced, the partition wall forming member 78A forming a part of the partition wall of the fluid chamber 84 is formed. Is also displaced, whereby the volume of the fluid chamber 84 changes, and the expansion spring of the support elastic body 32 deforms due to the change in volume, so that an active support force in both the forward and reverse directions is generated in the anti-vibration support device 20. Of.

Each filter coefficient W _i of the adaptive digital filter W which becomes the drive signal y is a synchronous Filtered-
Since it is sequentially updated by the above formula (1) according to the X LMS algorithm, after a certain amount of time has passed and each filter coefficient W _i of the adaptive digital filter W has converged to an optimum value, the drive signal y is shaken. By being supplied to the support device 1, the idle vibration and the muffled sound vibration transmitted from the engine 17 to the vehicle body 18 side via the anti-vibration support device 20 are reduced.

Next, the function and effect of the seal member 86 of this embodiment will be described. Drive signal y is applied to the excitation coil 52b.
In a state in which the pressure is not supplied, the movable member 78 is displaced to a neutral position where the supporting force of the leaf spring 82 and the magnetic force of the permanent magnet 52c are balanced, but at this time, the partition wall forming member 7
The seal member 86 fixed between 8A and the seal ring 72 does not elastically deform.

When the drive signal y is supplied to the exciting coil 52b from this neutral position, the drive signal y is supplied.
If the electromagnetic force generated by the exciting coil 52b is in the opposite direction to the magnetic force of the permanent magnet 52c, the movable member 78 is displaced upward so as to increase the gap with the electromagnetic actuator 52, and conversely, is generated in the exciting coil 52b. If the electromagnetic force is in the same direction as the magnetic force of the permanent magnet 52c, the movable member 78 is displaced downward so that the gap with the electromagnetic actuator 52 decreases.

When the partition wall forming member 78A moves in the vertical direction in this manner, the elastic deformation amount of the seal member 86 at the position where the recessed portion 86d is provided becomes large as compared with other regions,
The region inside the recessed portion 86d is the partition wall forming member 78A.
Moves up and down with. Therefore, as shown in FIG. 3, the area of the upper surface of the partition wall forming member 78A and the recessed portion 8
Since a large effective pressure receiving area ES ₂ combined with the area of the upper surface of the seal member 86 inside 6d is provided, and the volume change of the fluid chamber 15 can be increased, the vibration isolating support device 20 of the present embodiment can be It is possible to generate a large active supporting force in the opposite directions.

On the other hand, the position where the recessed portion 86d of the seal member 86 is provided is the outer peripheral portion 86 fixed to the seal ring 72.
a and the inner peripheral portion 86b fixed to the rib 80b of the partition wall forming member 78A, and a large stress is not applied to the outer peripheral portion 86a and the inner peripheral portion 86b, the seal ring 72 and the partition wall forming member 78A are sealed. The constant fixing force of the member 86 can be maintained for a long period of time.

Further, the outer peripheral portion 86a of the seal member 86 is
Since the entire area of the inner peripheral surface of the seal ring 72 is vulcanized and adhered, the adhesion area increases. In addition, the seal ring 72
Since the adhesive surface of is formed into a curved shape, the sealing member 8
Even if the outer peripheral portion 86a of 6 is elastically deformed, the outer peripheral portion 86a
The stress applied to is dispersed. Thereby, the seal member 86
The fixing force between the outer peripheral portion 86a and the seal ring 72 is further increased.

The inner peripheral portion 86b of the seal member 86 is
An annular rib 80 protruding upward from the outer periphery of the partition wall portion 80c
Since it is vulcanized and adhered so as to cover the periphery of b, the adhesion area increases. Further, since the outer periphery and the top of the rib 80b to which the seal member 86 is adhered are formed in a curved shape, even if the inner peripheral portion 86b of the seal member 86 is elastically deformed, the inner peripheral portion 8 thereof is not deformed.
The stress applied to 6b is dispersed. This further increases the fixing force between the inner peripheral portion 86b of the seal member 86 and the partition wall forming member 78A.

As described above, when the electromagnetic force of the electromagnetic actuator 52 is not generated (when the drive signal y is not supplied to the exciting coil 52b), the seal member 86 is not elastically deformed, and the electromagnetic force of the electromagnetic actuator 52 is reduced. The seal member 86 is elastically deformed in the vertical direction only when a force is generated and the movable member 78 is displaced in the vertical direction, so that the elastic deformation amount of the entire seal member 86 is reduced as compared with the conventional device.

Therefore, the seal member 86 of the present embodiment.
Does not apply a large stress to the outer peripheral portion 86a and the inner peripheral portion 86b, the fixing force between the outer peripheral portion 86a of the seal member 86 and the seal ring 72 increases, and the inner peripheral portion 86 of the seal member 86 increases.
Since the fixing force between b and the partition wall forming member 78A is increased and the elastic deformation amount of the entire seal member 86 is reduced, the durability is significantly improved. Further, the rib 8 is provided on the partition wall portion 80c of the partition wall forming member 78A.
An extended seal portion 86c continuously extending from the 0b side seal member 86 is vulcanized and adhered.
Although it has a function of increasing the fixing force of the seal member 86 to the partition wall forming member 78A, the following effects can also be obtained. That is, when the exciting coil 52b of the electromagnetic actuator 52 generates heat, this heat may be transferred to the fluid in the fluid chamber 84 via the movable member 78 to boil the fluid, but the extension covering the upper surface of the partition wall portion 80c. Seal part 8
Since 6c functions as a heat blocking member that prevents heat transfer, it is possible to prevent boiling of the fluid in the fluid chamber 84.

Here, the partition wall forming member 78A of the present embodiment.
Corresponds to the upper part of the movable member of the present invention, the engine side connecting member 30 corresponds to the first member of the present invention, and the device case 43,
The seal ring 72 and the support ring 74 correspond to the second member of the present invention.

Next, FIG. 4 shows a second embodiment of the present invention. The overall configuration is similar to that of the above-described first embodiment, and therefore its illustration and description will be omitted.

The partition wall forming member 78C constituting the movable member 78 of the present embodiment is a member having a substantially disk-like appearance, without forming ribs as in the first embodiment. The outer peripheral surface 78C ₁ of the partition wall forming member 78C is formed in a curved shape.

The seal member 90 fixed by vulcanization adhesion between the partition wall forming member 78C and the inner peripheral surface of the seal ring 72 is divided into the partition wall forming member 78C from the outer peripheral portion 90a fixed to the seal ring 72. It is formed in a ring shape in which the wall thickness gradually increases toward the inner peripheral portion 90b fixed to.

The inner peripheral portion 90b of the seal member 90 is
The extended seal portion 90c is fixed to cover the outer peripheral surface 78C ₁ formed in the curved shape of the partition wall forming member 78C and fixed to the inner peripheral portion 90b of the seal member 90, and covers the upper surface of the partition wall forming member 78C. Are continuously formed.

When the electromagnetic force of the electromagnetic actuator 52 is not generated, the movable member 78 moves to the leaf spring 82.
Neutral position (the yoke 52c and the magnetic path forming member 78) where the supporting force (reaction force that faces upward) of the permanent magnet 52c balances with the magnetic force of the permanent magnet 52c.
However, when the movable member 78 is displaced to the above-mentioned neutral position, the seal member 90 does not elastically deform and the movable member 78 is displaced.
The fixing position is set with respect to the outer circumference of the partition wall forming member 78C and the inner circumferential surface of the seal ring 72 so that the elastic deformation is caused when is displaced above or below the neutral position.

According to this embodiment, the partition wall forming member 78
When C moves in the vertical direction, the seal member 90 has a large elastic deformation amount on the outer peripheral side having a small wall thickness, and the partition wall forming member 7
Moves vertically with 8C. Therefore, as shown in FIG. 4, a large effective pressure receiving area ES ₃ is obtained by combining the area of the upper surface of the partition wall forming member 78C and the area of the inner peripheral side of the seal member 90, and the volume change of the fluid chamber 15 is increased. Therefore, the anti-vibration support device 20 of the present embodiment is
A large active supporting force can be generated in both forward and reverse directions.

The inner peripheral portion 90b of the seal member 90 is
Outer peripheral surface 78C of partition wall forming member 78C ₁Vulcanization and adhesion
As a result, the adhesion area increases. Also, the seal member
The outer peripheral surface 78 to which 90 is bonded is formed in a curved shape.
Therefore, even if the inner peripheral portion 90b of the seal member 90 is elastically deformed,
The stress applied to the inner peripheral portion 90b is dispersed. By this
The inner peripheral portion 90b of the seal member 90 and the partition wall forming member 7
The fixing force between 8C increases.

As described above, when the electromagnetic force of the electromagnetic actuator 52 is not generated, the seal member 9
0 is not elastically deformed, and the seal member 90 is elastically deformed in the vertical direction only when the electromagnetic force of the electromagnetic actuator 52 is generated and the movable member 78 is displaced in the vertical direction. The elastic deformation amount of is reduced.

Therefore, the seal member 90 of the present embodiment.
Also, a large stress is not applied to the outer peripheral portion 90a and the inner peripheral portion 90b, the fixing force between the outer peripheral portion 90a of the seal member 90 and the seal ring 72 increases, and the inner peripheral portion 90 of the seal member 90 increases.
Since the fixing force between b and the partition wall forming member 78C is increased and the elastic deformation amount of the entire sealing member 90 is reduced, the durability is significantly improved.

Further, since the extension seal portion 90c is vulcanized and adhered to the upper surface of the partition wall forming member 78C, the extension seal portion 90c functions as a heat blocking member for preventing heat transfer, and the fluid in the fluid chamber 84 is prevented. Boiling can be prevented.

The object to which the present invention is applied is not limited to a vehicle, and the present invention can be applied to a vibration-damping support device for reducing vibrations other than the engine 17. Regardless of the above, the same operational effects as those of the above-described respective embodiments can be obtained. For example, the present invention can be applied even to a vibration isolation support device that reduces vibrations transmitted from a machine tool to a floor or a room.

Further, in each of the above embodiments, the synchronous filtere is used as an algorithm for generating the drive signal y.
Although the d-X LMS algorithm is applied, the applicable algorithm is not limited to this, and may be, for example, a normal Filtered-X LMS algorithm.

[Brief description of drawings]

FIG. 1 is a schematic side view of a vehicle.

FIG. 2 is a cross-sectional view showing the structure of the vibration-damping support device of the present invention.

FIG. 3 is a diagram showing a first embodiment of a seal member and a movable member according to the present invention.

FIG. 4 is a diagram showing a second embodiment of a seal member and a movable member according to the present invention.

FIG. 5 is a cross-sectional view showing a configuration of a preceding anti-vibration support device.

[Explanation of symbols]

Reference Signs List 17 engine (vibrating body) 18 vehicle body (supporting body) 20 anti-vibration supporting device 30 engine side connecting member (first member) 32 supporting elastic body 43 device case (second member) 52 electromagnetic actuator 52a yoke 52b exciting coil 72 seal ring (Second member) 74 Support ring (second member) 78 Movable member 78A Partition wall forming member 80b Rib 82 Leaf spring 84 Fluid chamber 86, 90 Seal member 86a, 90a Outer peripheral portion 86b, 90b of seal member Inner peripheral portion of seal member 86c, 90c extending seal portion 86d recessed portion ES _2, ES ₃ effective pressure receiving area

Front page continuation (72) Inventor Kazushige Aoki 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (56) Reference JP-A-6-264955 (JP, A) JP-A-9-100868 ( JP, A) JP-A-9-250590 (JP, A) Actually developed 60-139939 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16F 13/26

Claims (8)

(57) [Claims] 1. A support elastic body, a first member to which one end side of the support elastic body is fixed, a second member to which the other end side of the support elastic body is fixed, the support elastic body and the second member. Defined by the above, a fluid chamber in which a fluid is enclosed, a movable member disposed inside the second member and displaced in a direction in which the volume of the fluid chamber is changed, and the fluid sandwiching the movable member. An electromagnetic actuator that is supported by the second member so as to be located on the side opposite to the chamber and that displaces the movable member, and a leaf spring that elastically supports the movable member so that the movable member faces the electromagnetic actuator. A sealing member made of an elastic body, the inner peripheral portion of which is fixed to the outer periphery of the movable member, the outer peripheral portion of which is fixed to the second member, and which prevents leakage of fluid from the fluid chamber to the electromagnetic actuator. Anti-vibration support In lifting devices, the sealing member, as well as substantially uniformly formed wall thickness from the inner peripheral portion which is fixed to the outer periphery of the movable member to the outer peripheral portion which is fixed to said second member, said second member An anti-vibration support device, characterized in that an annular recessed portion whose thickness is locally reduced is formed on the outer peripheral side closer to the side. 2. A support elastic body, a first member to which one end side of the support elastic body is fixed, a second member to which the other end side of the support elastic body is fixed, the support elastic body and the second member. Defined by the above, a fluid chamber in which a fluid is enclosed, a movable member disposed inside the second member and displaced in a direction in which the volume of the fluid chamber is changed, and the fluid sandwiching the movable member. An electromagnetic actuator that is supported by the second member so as to be located on the side opposite to the chamber and that displaces the movable member, and a leaf spring that elastically supports the movable member so that the movable member faces the electromagnetic actuator. A sealing member made of an elastic body having an inner peripheral portion fixed to the outer periphery of the movable member and an outer peripheral portion fixed to the second member, the elastic member preventing fluid from leaking from the fluid chamber to the electromagnetic actuator. Anti-vibration provided In the support device, the seal member is formed by gradually increasing the thickness from the outer peripheral portion fixed to the second member toward the inner peripheral portion fixed to the outer periphery of the movable member. Anti-vibration support device. 3. The second member is formed with an annular protrusion that protrudes toward the outer periphery of the movable member, and the outer periphery of the seal member is fixed to the entire periphery of the protrusion. The anti-vibration support device according to claim 1. 4. The anti-vibration support device according to claim 1, wherein the fixing surface of the second member to which the outer peripheral portion of the seal member is fixed is formed in a curved shape. 5. An annular rib protruding from the outer periphery of the movable member in the displacement direction of the movable member is formed on the movable member,
The anti-vibration support device according to any one of claims 1 to 4, wherein the inner peripheral portion of the seal member is fixed to the entire circumference of the rib. 6. The anti-vibration support device according to claim 1, wherein a fixed surface of the outer periphery of the movable member to which the inner peripheral portion of the seal member is fixed is formed in a curved shape. 7. The seal member fixed to the outer periphery of the movable member is provided so as to extend so as to cover substantially the entire area of the surface of the movable member facing the fluid chamber.
7. The anti-vibration support device according to any one of 6 to 6. 8. The electromagnetic actuator includes a permanent magnet that generates a magnetic force that attracts the movable member, and an electromagnetic force that is generated in a direction opposite to a magnetic force direction of the permanent magnet according to a drive signal. An exciting coil for displacing, the electromagnetic force of the exciting coil is not generated, the movable member is displaced to a position where the supporting force of the leaf spring and the magnetic force of the permanent magnet are balanced, The vibration proof according to any one of claims 1 to 7, wherein fixed positions of an outer circumference of the movable member and an inner circumference of the second member are set so that the seal member does not elastically deform. Support device.