JPH11264440A - Vibration proof supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration proof supporting device which generates high supporting force by employing a large effective pressure receiving area and also to provide a sealing member having enhanced durability. SOLUTION: The outer periphery part 86a of a sealing member 86 covers the entire region of the curved surface-formed inner periphery surface of a sealing ring 72 for fixation. The inner periphery part 86b covers the outer periphery surface, the top part, and the inner periphery surface of a curved surface-formed rib 80b for fixation. An extended sealing part 86C for covering the upper surface of the partition wall part 80c of the rib is continuously formed on the inner periphery part of the sealing member. A toroidal recessed part 86d is formed on the upper surface at the position approaching the outer periphery part of the sealing member. In the absence of the electromagnetic force of an electromagnetic actuator, a movable member 78 is displaced as far as the neutral position providing balance to the bearing power of a plate spring 82 and the magnetic force of a permanent magnet 52c. Where, the sealing member has no elastic deformation on displacing the movable member as far as the neutral position. The fixing position between a partition-forming member and the sealing ring is set so that the movable member may have the elastic deformation on upwardly or downwardly displacing the movable member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for supporting a vibrating body such as an engine of a vehicle on a supporting body such as a vehicle body while damping the vibration, and particularly to an improvement in 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 Application Laid-Open No. 9-250590.

That is, a schematic diagram of a vibration-proof support device as a prior art is shown in FIG.
Has, for example, a plate-shaped fixing member 2 fixed to a vibrating body side of an engine or the like, and a bolt 2a for attachment to an engine is integrally provided on an upper surface of the fixing member 2,
The center of the upper surface of the supporting elastic body 3 is vulcanized and bonded to the back surface of the fixing member 2.

The supporting elastic body 3 is a thick circular rubber-like elastic body whose central portion is raised above the peripheral edge portion, and its outer peripheral surface is vulcanized and bonded to the inner peripheral surface of the upper end portion of the cylindrical member 4. Have been. 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 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 up and down, and a yoke 10A.
Permanent magnet 1 fixed to the center of the upper surface with the poles pointing up and down
A fixing bolt (not shown) or the like is fixed to the lower end surface of the yoke 10A, and the yoke 10A is fixed to a support such as a vehicle body using the bolt.
It should be noted that a load sensor or the like (not shown) is interposed between the yoke 10A and the support to detect residual vibration required for vibration reduction control.

On the other hand, a movable member 11 is provided above the electromagnetic actuator 10 so as to be vertically displaceable within the outer cylinder 7 with a predetermined gap provided between the movable member 11 and the permanent magnet 10C. . The movable member 11 includes a substantially disk-shaped partition wall forming member 11A and a substantially disk-shaped iron magnetic path forming member 11B, and includes the partition wall forming member 11A and the magnetic path forming member 11B. The cylindrical portion 11a protruding downward from the center of the back surface of the partition wall forming member 11A located farther from the electromagnetic actuator 10 is
A cylindrical portion 1 formed at the center of a magnetic path forming member 11B located closer to the electromagnetic actuator 10 and protruding upward.
It is integrated by being press-fitted into 1b. The periphery 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.

[0007] The tip of the cylindrical portion 11b abuts against the back surface of the partition wall forming member 11A.
Between the partition wall forming member 11A and the magnetic path forming member 11B, a constricted portion 12 which is continuous in a ring shape is formed. A leaf spring 13 made of a spring steel material is accommodated in the constricted portion 12 to elastically support the movable member 11. The upper surface of the inner peripheral portion of the leaf spring 13 is
A thick portion 11c formed so as to surround the distal end portion of the cylindrical portion 11b at the center of the back surface of A, and the outer peripheral surface of the leaf spring 13 is formed in 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 a leaf spring 13.

The upper surface of the partition wall forming member 11A is flat, and the upper surface, the lower surface of the support elastic member 3, and the inner peripheral surface of the cylindrical member 4 form a fluid chamber 15. A fluid is sealed inside. However, the fluid chamber 15
In order to prevent leakage of fluid to the constricted part 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 that moves up and down and the inner peripheral surface of the upper spacer 5.

That is, the sealing 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 bonding, and the outer peripheral surface of which is the upper spacer 5. Is fixed to the inner peripheral surface by vulcanization bonding, and its elastic deformation allows relative displacement of the movable member 11 with respect to the upper spacer 5 and the outer cylinder 7 in the vertical direction.

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

[0011]

The movable member 1
Since the seal member 16 is also elastically deformed in accordance with the displacement of 1, the amount of deformation may be reduced in order to secure durability. Therefore, the thickness is increased to increase the effective pressure receiving area of the seal member 16 (partition forming member). The pressure receiving area (the area of the upper surface of 11A and the area of the seal member 16 that is vertically displaced together with the partition wall forming member 11A from the outer periphery of the upper surface) may be set large.

However, if the seal member 16 is formed to have substantially the same thickness from the inner peripheral portion on the partition wall forming member 11A side to the outer peripheral portion on the upper spacer 5 side to simply increase the effective pressure receiving area of the movable member 11, Is displaced in the up-down direction, the inner peripheral portion fixed to the partition wall forming member 11A indicated by the symbol A in FIG.
₁ is a small value corresponding to only the area of the upper surface of the partition wall forming member 11A, and it is difficult for the anti-vibration support device 1 to generate a large supporting force.

The seal member 11 is formed of the partition wall forming member 1.
Since elastic deformation occurs at the inner peripheral portion fixed to 1A, if the elastic deformation is repeated for a long period of time, the fixing force to the partition wall forming member 11A decreases, and there is a problem in durability of the seal member 11.

The present invention has been made in view of the unsolved problem of the preceding vibration isolating support device, and a large supporting force can be generated by setting a large effective pressure receiving area. Another object of the present invention is to provide an anti-vibration support device capable of obtaining a seal member having improved durability.

[0015]

In order to achieve the above object, the invention according to claim 1 is directed to a supporting elastic body, a first member to which one end of the supporting elastic body is fixed, and a supporting elastic body. A second member having the other end fixed thereto, a fluid chamber defined by the support elastic body and the second member, and having a fluid sealed therein; and a fluid chamber disposed inside the second member and having the fluid chamber defined therein. A movable member that is displaced in a direction in which the volume is changed, an electromagnetic actuator that is supported by the second member so as to be located on the opposite side of the fluid chamber with the movable member interposed therebetween, and that displaces the movable member; A leaf spring for elastically supporting the movable member so that the member faces the electromagnetic actuator, an inner peripheral portion fixed to an outer periphery of the movable member, and an outer peripheral portion fixed to a second member; The electromagnetic actuator Wherein the seal member is fixed to the second member from an outer peripheral portion fixed to the outer periphery of the movable member. The thickness up to the inner peripheral portion is substantially uniform, and an annular concave portion whose thickness is locally reduced is formed on the outer peripheral side closer to the second member side.

According to a second aspect of the present invention, there is provided a support elastic member, and a first member to which one end of the support elastic member is fixed.
A second member to which the other end of the support elastic body is fixed; a fluid chamber defined by the support elastic body and the second member and in which a fluid is sealed therein; and a fluid chamber disposed inside the second member. A movable member that is displaced in a direction that changes the volume of the fluid chamber, and an electromagnetic member that is supported by the second member and is located on the opposite side of the fluid chamber across the movable member and displaces the movable member. An actuator, a leaf spring elastically supporting the movable member such that the movable member faces the electromagnetic actuator, an inner peripheral portion fixed to an outer periphery of the movable member, and an outer peripheral portion fixed to a second member. A sealing member made of an elastic body for preventing leakage of fluid from the fluid chamber to the electromagnetic actuator, wherein the sealing member is located forward from 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 anti-vibration support device according to the first or second aspect, the second member is provided with an annular projecting portion projecting toward an outer periphery of the movable member. The outer peripheral portion of the seal member was fixed to the entire periphery of the projecting portion.

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

According to a fifth aspect of the present invention, in the anti-vibration support device according to any one of the first to fourth aspects, the movable member has an annular shape projecting from an outer periphery thereof in a displacement direction of the movable member. And the inner peripheral portion of the seal member was fixed to the entire periphery 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 outer peripheral fixing surface of the movable member to which the inner peripheral portion of the seal member is fixed is provided.
It was formed into a curved shape.

According to a seventh aspect of the present invention, in the vibration damping support device according to any one of the first to sixth aspects, a seal member fixed to an 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 surface.

Further, the invention described in claim 8 is the first invention.
8. The anti-vibration support device according to any one of claims 7 to 7, wherein the electromagnetic actuator includes: a permanent magnet that generates a magnetic force for attracting the movable member; and a forward / reverse direction with respect to a magnetic force direction of the permanent magnet according to a drive signal. An exciting coil that generates an electromagnetic force and displaces the movable member; the exciting force of the exciting coil is not generated, 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 is not elastically deformed when displaced to the position.

[0023]

According to the first aspect of the present invention, when the movable member is displaced, the amount of elastic deformation of the seal member at the position where the concave portion is provided becomes larger than that of the other region, and the region inside the concave portion is inside. Moves with the upper part of the movable member in a direction that changes the volume of the fluid. Therefore, a large effective pressure receiving area is obtained by combining the upper area of the movable member facing the fluid chamber and the area of the seal member inside the recess, so that the volume change of the fluid chamber can be increased. The vibration support device can generate an active large supporting force.
Further, the concave 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 a 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 time.

According to the second aspect of the invention, when the movable member is displaced, the amount of elastic deformation on the outer peripheral side of the seal member having a small thickness becomes larger than that on the inner peripheral side. The side region moves with the upper part of the movable member in a direction to change the volume of the fluid. Therefore, a large effective pressure receiving area is obtained by combining the upper area of the movable member facing the fluid chamber and the area of the inner peripheral side sealing member, and the volume change of the fluid chamber can be increased. The device can also generate large active support forces.

According to the third aspect of the present invention, the effect of the first or second aspect can be obtained, and the outer peripheral portion of the seal member is fixed to the entire periphery of the annular projection provided on the second member. As a result, the fixing area of the outer peripheral portion of the seal member to the second member increases, and the durability of the seal member improves.

According to a fourth aspect of the present invention, the effect of any one of the first to third aspects can be obtained, and the fixing surface of the second member to which the outer peripheral portion of the sealing member is fixed is formed into a curved surface. Therefore, even if 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 further increases.

According to the fifth aspect of the present invention, the effects described in any one of the first to fourth aspects can be obtained, and the movable member has an annular shape projecting from the outer periphery in the direction of displacement of the movable member. Is formed, and the inner peripheral portion of the seal member is fixed to the entire periphery of the rib, so that the fixing area of the seal member to the movable member is increased, and the durability of the seal member is improved.

According to a sixth aspect of the present invention, the effect of any one of the first to fifth aspects can be obtained, and the outer peripheral fixing surface of the movable member to which the inner peripheral portion of the seal member is fixed is curved. Due to the 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 further increases.

According to a seventh aspect of the present invention, the effects described in any one of the first to sixth aspects can be obtained, and a seal member fixed to the outer periphery of the movable member is provided in the fluid chamber of the movable member. Is extended so as to cover substantially the entire area of the surface opposed to the movable member, so that the fixing area of the seal member to the movable member further increases. Further, when the electromagnetic actuator generates heat, the heat may be transmitted to the fluid in the fluid chamber via the movable member, and the fluid may boil.However, the heat is applied so as to cover substantially the entire surface of the movable member facing the fluid chamber. Since the seal member is extended, the extended portion functions as a heat blocking member for preventing heat transfer, and can prevent boiling of the fluid.

Further, the invention described in claim 8 is the first invention.
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 movable member is displaced by the electromagnetic force of the electromagnetic actuator. Only when is the seal member elastically deformed, the elastic deformation 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]

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. An engine (vibrating body) 17 is provided from a suspension member or the like via an anti-vibration support device (active engine mount) 20 capable of generating an active support force according to a drive signal. It is supported by a configured vehicle body (support) 18. Actually, 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 interposed between the engine 17 and the vehicle body 18 in addition to the vibration isolating support device 20. ing. As a passive engine mount, for example, a normal engine mount that supports a load with a rubber-like elastic body,
A well-known fluid-filled mount insulator or the like in which a fluid is sealed in a rubber-like elastic body so as to generate a damping force can be applied.

Next, FIG. 2 shows a specific configuration of the anti-vibration support device 20 according to the first embodiment. The device case 43 includes an outer cylinder 34 and an orifice component 3.
6, a mounting member such as an inner cylinder 37 and a support elastic body 32 is built in, and a movable member 78 elastically supported while forming a part of a partition wall of the fluid chamber 84 is formed below the mounting component. The electromagnetic actuator 52 displaces in the direction in which the vibration changes, and a load sensor 64 for detecting a vibration state of the vehicle body member 28 is built in.

That is, the anti-vibration support device 20 of this embodiment
Has an engine-side connecting member 30 with the 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.

The lower side of the engine side connecting member 30 and the hollow cylindrical body 30
The supporting elastic body 32 is fixed by vulcanization bonding so as to cover the periphery of b. The support elastic body 32 is a thick, substantially cylindrical elastic body that is gently inclined downward from the center to the outer periphery, and has a hollow section 32a having a mountain-shaped cross section on the inner surface. And the supporting elastic body 3 made thin
2 has a shaft center (hereinafter referred to as a mount shaft) P _1.
Is connected to the inner peripheral surface of the orifice component member 36 facing the vibrating body supporting direction (in this case, the vertical direction) coaxially with the hollow cylindrical body 30b by vulcanization bonding.

The orifice constituting member 36 is a member in which a small-diameter cylindrical portion 36c is continuously formed between an upper cylindrical portion 36a and a lower cylindrical portion 36b having the same outer diameter, and has an annular concave portion on the outer circumference. Although not shown, an opening is formed in the small-diameter cylindrical portion 36c, and the inside and the outside of the orifice constituting 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 the same inner diameter as the outer diameters of the upper and lower cylindrical portions 36a and 36b of the orifice constituting member 36, and has an axial length equal to that of the orifice constituting member 36. These are cylindrical members set to the same dimensions. An opening 34a is formed in the outer cylinder 34, and an outer periphery of a diaphragm 42 made of a rubber thin film elastic body is coupled to an opening edge of the opening 34a so as to close the opening 34a. It bulges toward the inside of the outer cylinder 34.

When the outer cylinder 34 having the above structure is fitted around the orifice constituting member 36 so as to surround the annular concave portion, an annular space is defined in the circumferential direction between the outer cylinder 34 and the orifice constituting member 36, and the annular space is defined. The diaphragm 42 is disposed in the space in a swelled state.

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

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

Then, the outer cylinder 34 in which the supporting elastic body 32, the orifice constituting member 36, the inner cylinder 37 and the diaphragm 42 are integrated is fitted into the inside of the apparatus case 43 from the lower end opening thereof, and the lower surface of the upper end caulking part 43a is inserted. The upper ends of the outer cylinder 34 and the orifice constituting member 36 are brought into contact with each other, so that they are disposed in the upper part in 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. The air chamber 42c is provided through the air hole 43a.
And the atmosphere are in communication.

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

The electromagnetic actuator 52 includes a cylindrical yoke 52a, an annular exciting coil 52b buried on the upper end side of the yoke 52a, and a permanent magnet having a magnetic pole fixed vertically at the center of the upper surface of the yoke 52a. The upper yoke 52a and the lower yoke member 53b are vertically divided into two parts.
The lower outer periphery of the upper yoke member 53a and the upper outer periphery of the lower yoke member 53b are scraped to form a circumferentially continuous concave portion 52d. And
The diaphragm 70c of the spacer 70 is
An air chamber 70d is defined in a portion surrounded by the inner peripheral surface of the device case 43 and the diaphragm 70c, and an air hole 43b is formed at a position facing the air chamber 70d.
Are formed, and the air chamber 7 is formed through the air holes 43b.
0d communicates with the atmosphere. A load sensor 64 is interposed between the lower surface of the yoke 52a and the lid member 62 provided with the vehicle body side connection bolt 60 in order to detect residual vibration required for vibration reduction control. The load sensor 64
For example, a piezoelectric element, a magnetostrictive element, a strain gauge, or the like can be applied. As shown in FIG.
The residual vibration signal e is supplied to the controller 25.

On the other hand, a seal ring 72 for fixing a seal member having an inner peripheral portion formed into a curved shape protruding inward and a leaf spring 82 to be described later
A support ring 74 that supports the outer peripheral portion of the free end from below,
Gap holding ring 76 for setting gap H between permanent magnet 52c of electromagnetic actuator 52 and movable member 78
DOO, together with being disposed coaxially to the vibrating body support direction P _1, the movable member 78 is arranged so as to be displaced in the vertical direction on the inside of the rings.

The movable member 78 is a member formed of a disk-shaped partition wall forming member 78A in appearance and a magnetic path forming member 78B formed in a disk shape larger in diameter than the partition wall forming member 78A. A bolt hole 80a is formed in the axial center of the partition wall forming member 78A located far away,
The bolt 80 for the movable member that penetrates the magnetic path forming member 78B close to the electromagnetic actuator 52 is screwed into the bolt hole 80a, so that the partition wall forming member 78A and the magnetic path forming member 7 are formed.
8B are integrally connected.

The partition wall forming member 78A and the magnetic path forming member 78
A ring-shaped continuous constriction 79 is defined between B, and a plate spring 82 for elastically supporting the movable member 78 is accommodated in the constriction 79. That is, the leaf spring 82 is a disk-shaped member having a hole formed in the center, and the free end of the inner periphery of the leaf spring 82 is supported from below the rear center of the partition wall forming member 78A. 82 is supported at its free end from below by a spring support portion 74a of a support ring 74, whereby the movable member 78 is
3 is elastically supported via a leaf spring 82.

The partition wall forming member 78A is formed by reducing the thickness of the partition wall portion 80c facing the fluid chamber 84,
This is a member formed with an annular rib 80b projecting upward from the outer periphery of the rib 80b. As shown in FIG. 3, the outer periphery and the top of the rib 80b are formed in a curved surface shape. 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 fluid chamber, and a fluid is sealed in the fluid chamber 84.

Here, in order to prevent the fluid from leaking from the fluid chamber 84 to the constricted portion 79 containing the leaf spring 82, there is a gap between the outer periphery of the partition wall forming member 78 A and the inner periphery of the seal ring 72. A ring-shaped seal member 86 made of a rubber-like elastic body is fixed, and the 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. I have.

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 has a curved surface. The rib 80b formed in a shape is fixed so as to cover the outer peripheral surface, the top, and the inner peripheral surface. The inner peripheral portion 86b of the seal member 86 is provided with a partition 80 of the rib 80b.
An extended seal portion 86c covering the upper surface of the upper surface c is formed continuously.

The outer peripheral portion 86a of the seal member 86
An annular concave 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
Neutral position (the yoke 52c and the magnetic path forming member 78) at which the supporting force (reaction force facing upward) and the magnetic force of the permanent magnet 52c are balanced.
B), the seal member 86 is not elastically deformed when the movable member 78 is displaced to the above-described neutral position, and the movable member 78 is not deformed.
The fixed position with respect to the outer periphery of the partition wall forming member 78A and the inner peripheral surface of the seal ring 72 is set so that when the is displaced upward or downward from the neutral position, the elastic deformation occurs.

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

Here, for example, in the case of a reciprocating four-cylinder engine, the engine vibration of the engine rotation secondary component is generated by
The main reason is that the vibration is transmitted to the engine 8 and, if the drive signal y is generated and output in synchronization with the secondary component of the engine rotation, the vibration on the vehicle body side can be reduced. Therefore, in the present embodiment, an impulse signal synchronized with the rotation of the crankshaft of the engine 17 (for example, in the case of a reciprocating four-cylinder engine, one for every 180 ° rotation of the crankshaft) is generated, and the reference signal x Pulse signal generator 19 which outputs as
, And the reference signal x is supplied to the controller 25.

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

More specifically, the controller 25 has an adaptive digital filter W having a variable filter coefficient W _i (i = 0, 1, 2,..., I-1: I is the number of taps). At a predetermined sampling clock interval from the time when the reference signal x is input, the adaptive digital filter W
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 equation of the adaptive digital filter W is given by F
The following equation (1) is obtained according to the filtered-X LMS algorithm. _{W i (n + 1) =} W i (n) -μR T e (n) ...... (1) where, indicates that the value in (n), (n + 1 ) term is attached is sampling time n, n + 1, μ is a convergence coefficient. The update reference signal R ^T is theoretically expressed as
The reference signal x is transmitted to the electromagnetic actuator 5 of the anti-vibration support device 1.
2 is a value obtained by filtering a transfer function C between the load sensor 64 and the load sensor 64 with a transfer function filter C ＾ modeled by a finite impulse response filter, but since the magnitude of the reference signal x is “1”, the transfer function When the impulse response of the filter C # is generated one after another in synchronization with the reference signal x, the impulse response coincides with the sum of the impulse response waveforms at the sampling time n. Also, theoretically, the reference signal x is filtered by the adaptive digital filter W to generate the drive signal y. However, since the size of the reference signal x is “1”, the filter coefficient W _i is sequentially changed. Output as the drive signal y, the result is the same as when the result of the filter processing is set as the drive signal y.

Next, the operation of this embodiment will be described. That is, in a situation where idle vibration or muffled sound vibration is generated in the engine 17, the reference signal x is transmitted from the controller 25 to the electromagnetic actuator 52 of the vibration isolation support device 20.
Is input, the filter coefficient W _i of the adaptive digital filter W is sequentially supplied as the drive signal y at intervals of the sampling clock.

As a result, the drive signal y is supplied to the exciting coil 52b.
Is generated, but the magnetic path forming member 78B includes:
Since a constant magnetic force has already been applied by the permanent magnet 52c, the magnetic force of the exciting coil 52b is
It can be considered that it acts to increase or decrease the magnetic force of c. As described above, when the magnetic force of the permanent magnet 52c is increased or decreased, the movable member 78 is displaced in both the forward and reverse directions, and when the movable member 78 is displaced, the partition forming member 78A that forms a part of the partition of the fluid chamber 84 is formed. Is also displaced, thereby changing the volume of the fluid chamber 84, and the expansion spring of the support elastic body 32 is deformed by the change in the volume, so that an active supporting force in both the forward and reverse directions is generated in the vibration isolating support device 20. It is.

Each filter coefficient W _i of the adaptive digital filter W serving as the drive signal y is determined by a synchronous Filtered-
Since the sequentially updated by according to X LMS algorithm above (1), after the convergence to the optimal values each filter coefficient W _i of the adaptive digital filter W has passed a certain time, the drive signal y is antivibration By being supplied to the support device 1, idle vibration and muffled sound vibration transmitted from the engine 17 to the vehicle body 18 via the vibration isolating support device 20 are reduced.

Next, the operation and effect of the seal member 86 of the present embodiment will be described. The drive signal y is supplied to the exciting coil 52b.
Is not supplied, the movable member 78 is displaced to a neutral position where the support force of the leaf spring 82 and the magnetic force of the permanent magnet 52c are balanced.
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 the neutral position, the drive signal y
If the electromagnetic force generated in the exciting coil 52b is opposite to the magnetic force of the permanent magnet 52c, the movable member 78 is displaced upward so that the gap with the electromagnetic actuator 52 increases, and conversely, the movable member 78 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 is reduced.

When the partition wall forming member 78A moves in the vertical direction in this manner, the sealing member 86 has a larger elastic deformation amount at the position where the concave portion 86d is provided, as compared with other regions.
The area inside the recess 86d is the partition forming member 78A.
It moves up and down with it. Therefore, as shown in FIG. 3, the area of the upper surface of the partition wall forming member 78A and the recess 8
It is possible to increase the volume change of the fluid chamber 15 becomes larger effective pressure receiving area ES ₂ a combination of the area of the upper surface of the inner sealing member 86 than 6d, vibration-damping support device 20 of this embodiment, a positive An active large supporting force can be generated in both reverse directions.

On the other hand, the position where the concave portion 86 d of the seal member 86 is provided is the outer peripheral portion 86 fixed to the seal ring 72.
a, it is separated from both 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, so that the seal ring 72 and the partition wall forming member 78A are sealed. A constant fixing force of the member 86 can be maintained for a long period of time.

The outer peripheral portion 86a of the seal member 86 is
Since the entire inner peripheral surface of the seal ring 72 is vulcanized and bonded, the bonding area increases. Also, the seal ring 72
Is formed in a curved shape, so that the sealing member 8
6, even if the outer peripheral portion 86a is elastically deformed.
The stress applied to is dispersed. Thereby, the sealing member 86
The fixing force between the outer peripheral portion 86a and the seal ring 72 further increases.

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 the adhesive is vulcanized to cover the periphery of b, the bonding 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 surface shape, even if the inner periphery 86b of the seal member 86 is elastically deformed, the inner periphery 8b is formed.
The stress applied to 6b is dispersed. Thereby, the fixing force between the inner peripheral portion 86b of the seal member 86 and the partition wall forming member 78A further increases.

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 excitation coil 52b), the seal member 86 does not elastically deform, and the electromagnetic force of the electromagnetic actuator 52 does not change. Only when a force is generated and the movable member 78 is displaced in the vertical direction, the seal member 86 is elastically deformed in the vertical direction. Therefore, the elastic deformation of the entire seal member 86 is reduced as compared with the conventional device.

Therefore, the sealing member 86 of the present embodiment is
In the case, a large stress is not applied 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 is increased, and the inner peripheral portion 86 of the seal member 86 is increased.
Since the fixing force between the member b and the partition wall forming member 78A is increased and the amount of elastic deformation of the entire seal member 86 is reduced, the durability is greatly improved. Further, ribs 8 are provided on the partition wall portion 80c of the partition wall forming member 78A.
An extension seal portion 86c extending continuously from the seal member 86 on the 0b side is vulcanized and bonded, and this extension portion 86c also
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, the heat may be transmitted to the fluid in the fluid chamber 84 via the movable member 78, causing the fluid to boil, but the extension covering the upper surface of the partition wall portion 80c. Seal part 8
Since 6c functions as a heat blocking member for preventing heat transfer, boiling of the fluid in the fluid chamber 84 can be prevented.

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

Next, FIG. 4 shows a second embodiment of the present invention. Since the overall configuration is the same as that of the first embodiment, its illustration and description are omitted.

The partition wall forming member 78C constituting the movable member 78 of this embodiment is a member having a substantially disc shape in appearance without forming ribs as in the first embodiment. Then, 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 bonding between the partition wall forming member 78C and the inner peripheral surface of the seal ring 72 is moved from the outer peripheral portion 90a fixed to the seal ring 72 to the partition wall forming member 78C. Is formed in a ring shape in which the thickness is gradually increased toward the inner peripheral portion 90b fixed to the inner peripheral portion 90b.

The inner peripheral portion 90b of the seal member 90 is
Together are fixed to cover the outer peripheral surface 78C ₁ which is formed in a curved shape of the above-mentioned partition wall forming member 78C, the inner peripheral portion 90b of the seal member 90, the extension seal portion 90c covering the upper surface of the partition member 78C Are formed continuously.

When the electromagnetic force of the electromagnetic actuator 52 is not generated, the movable member 78
Neutral position (the yoke 52c and the magnetic path forming member 78) at which the supporting force (reaction force facing upward) and the magnetic force of the permanent magnet 52c are balanced.
B), the seal member 90 is not elastically deformed when the movable member 78 is displaced to the above-described neutral position, and the movable member 78 is not deformed.
The fixed position with respect to the outer periphery of the partition wall forming member 78C and the inner peripheral surface of the seal ring 72 is set so that when the is displaced upward or downward from the neutral position, the elastic deformation occurs.

According to this embodiment, the partition wall forming member 78
When C moves in the vertical direction, the amount of elastic deformation of the seal member 90 on the outer peripheral side with a small thickness increases, and the partition wall forming member 7
It moves up and down together with 8C. Accordingly, as shown in FIG. 4, to increase the area of the upper surface of the partition member 78C, is the area of the inner circumference side of the seal member 90 and the large effective pressure receiving area ES ₃ the combined volume change of the fluid chamber 15 Therefore, the anti-vibration support device 20 of the present embodiment includes:
An active large 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 ₁Vulcanized adhesive covering
Therefore, the bonding area increases. Also, a sealing member
The outer peripheral surface 78 to which 90 is bonded is formed into 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. This
The inner peripheral portion 90b of the seal member 90 and the partition wall forming member 7
The fixing force between 8C increases.

When the electromagnetic force of the electromagnetic actuator 52 is not generated as described above, the sealing member 9
0 is not elastically deformed, and the seal member 90 is elastically deformed in the vertical direction only when the movable member 78 is displaced in the vertical direction due to the generation of the electromagnetic force of the electromagnetic actuator 52. Reduces the amount of elastic deformation.

Therefore, the sealing member 90 of the present embodiment is
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 is increased, and the inner peripheral portion 90 of the seal member 90 is increased.
Since the fixing force between the member b and the partition wall forming member 78C is increased and the amount of elastic deformation of the entire sealing member 90 is reduced, the durability is greatly 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 application of the present invention is not limited to a vehicle. The present invention can be applied to an anti-vibration support device for reducing vibrations generated by components other than the engine 17. Regardless of the above, the same operation and effect as those of the above embodiments can be obtained. For example, the present invention is applicable to an anti-vibration support device that reduces vibration transmitted from a machine tool to a floor or a room.

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

[Brief description of the drawings]

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

FIG. 2 is a cross-sectional view illustrating a configuration of a vibration isolation support device of the present invention.

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

FIG. 4 is a view 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 vibration isolation support device.

[Explanation of symbols]

Reference Signs List 17 engine (vibrating body) 18 body (support) 20 anti-vibration support 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 of seal member 86b, 90b inner peripheral portion of seal member 86c, 90c Extended seal part 86d Depressed part ES ₂ , ES ₃ Effective pressure receiving area

Continued on front page (72) Inventor Kazushige Aoki 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Pref. Nissan Motor Co., Ltd.

Claims (8)

[Claims] 1. A support elastic body, a first member to which one end of the support elastic body is fixed, a second member to which the other end of the support elastic body is fixed, the support elastic body, and the second member A fluid chamber defined by and sealed with a fluid therein, a movable member disposed inside the second member and displaced in a direction to change the volume of the fluid chamber, and the fluid sandwiched by the movable member. An electromagnetic actuator that is supported by the second member so as to be located on the opposite side of the chamber and displaces the movable member; and a leaf spring that elastically supports the movable member so that the movable member faces the electromagnetic actuator. An inner peripheral portion fixed to the outer periphery of the movable member, an outer peripheral portion fixed to the second member, and a seal member made of an elastic body that prevents leakage of fluid from the fluid chamber to the electromagnetic actuator. Equipped anti-vibration In the supporting device, the seal member is formed to have a substantially uniform thickness from an outer peripheral portion fixed to the outer periphery of the movable member to an inner peripheral portion fixed to the second member, and the second member An anti-vibration support device characterized in that an annular concave 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 of the support elastic body is fixed, a second member to which the other end of the support elastic body is fixed, the support elastic body, and the second member A fluid chamber defined by and sealed with a fluid therein, a movable member disposed inside the second member and displaced in a direction to change the volume of the fluid chamber, and the fluid sandwiched by the movable member. An electromagnetic actuator that is supported by the second member so as to be located on the opposite side of the chamber and displaces the movable member; and a leaf spring that elastically supports the movable member so that the movable member faces the electromagnetic actuator. An inner peripheral portion fixed to the outer periphery of the movable member, an outer peripheral portion fixed to the second member, and a seal member made of an elastic body that prevents leakage of fluid from the fluid chamber to the electromagnetic actuator. Equipped anti-vibration In the supporting device, the thickness of the seal member is gradually increased from an outer peripheral portion fixed to the second member to an inner peripheral portion fixed to the outer periphery of the movable member. And anti-vibration support device. 3. An annular projection protruding toward the outer periphery of the movable member is formed on the second member, and the outer periphery of the seal member is fixed to the entire periphery of the projection. An anti-vibration support device according to claim 1. 4. The anti-vibration support device according to claim 1, wherein a fixing surface of the second member to which an 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 a direction of displacement of the movable member,
The anti-vibration support device according to any one of claims 1 to 4, wherein an inner peripheral portion of the seal member is fixed to an entire periphery of the rib. 6. The anti-vibration support device according to claim 1, wherein a fixing surface of an outer periphery of the movable member to which an inner peripheral portion of the seal member is fixed is formed in a curved shape. 7. A seal member fixed to an outer periphery of the movable member is provided so as to extend so as to cover substantially the entire surface of the movable member facing the fluid chamber.
7. The anti-vibration support device according to any one of claims 1 to 6. 8. The electromagnetic actuator includes: a permanent magnet that generates a magnetic force for attracting the movable member; and an electromagnetic force that generates a magnetic force in a direction opposite to a magnetic force direction of the permanent magnet in response to a drive signal to generate the movable member. When 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, without generating an electromagnetic force of the exciting coil. The anti-vibration device according to any one of claims 1 to 7, wherein fixed positions of an outer periphery of the movable member and an inner periphery of the second member are set so that the seal member does not become elastically deformed. Support device.