JPH11230236A - Vibration control support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain stable vibration control characteristics without a hindrance to a displacement operation of a movable member by improving material and shape of the movable member. SOLUTION: A movable member 78 is a combination of a partitioning wall forming member 78A and a magnetic path forming member 78B. The partitioning wall forming member 78A forms a part of a partitioning wall of a fluid chamber 84. The magnetic path forming member 78B is placed on a side of an electromagnetic actuator 52. The partitioning wall forming member 78A is made from non-magnetic material of aluminum alloy and the magnetic path forming member 78B is made from magnetic material of iron. A partitioning wall portion 80c of the partitioning wall forming member 78A is coupled the magnetic path forming member 78B while it faces the fluid chamber 84. A wall thickness of the partitioning wall portion 80c is thinned and a ring-shaped rib 80b of the partitioning wall forming member 78A is projected in a displacement direction of the movable member 78 from an outer circumference of the partitioning wall portion 80c. A seal member 86 is fixed all over the circumference between the rib 80b and a seal ring 72. The movable member 78 is supported elastically via a leaf spring 82 by a supporting ring 74, an inner circumference of which leaf spring 82 is in contact with a surface of the partitioning wall forming member 78A facing an opposite side to the fluid chamber 84.

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 vibrating body such as an engine of a vehicle on a supporting body such as a vehicle body while damping the vibration. In a vibration isolating support device, a fluid chamber is defined by a supported elastic body, and a vibration transmission rate can be reduced by actively changing the volume of the fluid chamber.
This is an improvement of the structure of the movable section that changes the volume of the fluid chamber by vertical displacement.

[0002]

2. Description of the Related Art As a prior art of this kind, for example, FIG.
And Japanese Patent Application No. 8-59219 previously proposed by the present applicant.

That is, a vibration-proof support device as a prior art will be described with reference to FIG. 4. This vibration-proof support device 1 is a flat fixing member 2 fixed to a vibrating body such as an engine.
A bolt 2a for attachment to the engine is integrally provided on the upper surface of the fixing member 2, and 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. ing.

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. That is, with the cylindrical member 4, the upper spacer 5, the lower spacer 6, and the edge 10a pressed into the inner surface of the outer cylinder 7 in this order, the upper end and the lower end of the outer cylinder 7 are bent inward. Thereby, each member is integrated.

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.
Note that a weight 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 disposed above the electromagnetic actuator 10 so as to be vertically displaceable in the outer cylinder 7. The movable member 11 is a member composed of a substantially disk-shaped iron partition wall forming member 11A and a substantially disk-shaped iron magnetic path forming member 11B, and the partition wall forming member 11A and the magnetic path forming member are formed. 11B is a columnar portion 1 protruding downward from the center of the back surface of the partition wall forming member 11A located far from the electromagnetic actuator 10.
1a is press-fitted into a cylindrical portion 11b formed at the center of the magnetic path forming member 11B located closer to the electromagnetic actuator 10 and protruding toward the upper surface side to be integrated. The lower surface of the magnetic path forming member 11B (the electromagnetic actuator 1
A stopper member 11C 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 is fixed to a peripheral portion of the (0-side surface).

[0007] The tip of the cylindrical portion 11b abuts against the back surface of the partition wall forming member 11A.
A ring-shaped continuous leaf spring accommodating space 12 is formed between the partition wall forming member 11A and the magnetic path forming member 11B. In this leaf spring accommodating space 12, the movable member 1
In order to elastically support 1, a leaf spring 13 made of a spring steel material is accommodated. The upper surface of the inner peripheral portion of the leaf spring 13 supports a thick portion 11c formed so as to surround the tip of the cylindrical portion 11b at the center of the rear surface of the partition wall forming member 11A. Is supported by a support portion 6 a formed on the inner peripheral surface of the lower spacer 6 and formed of a ring-shaped continuous convex portion, whereby the movable member 11 is elastically connected to the outer cylinder 7 via the leaf spring 13. Supported.

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 member 3, and the inner peripheral surface of the cylindrical member 4. A fluid is sealed in the inside of the nozzle 15. However, fluid chamber 1
5 to prevent the fluid from leaking to the leaf spring accommodating space 12 side of the movable member 11 that moves up and down.
A seal member 1 is provided between the outer peripheral surface and the inner peripheral surface of the upper spacer 5.
6 is fixed.

That is, the sealing member 16 is a ring-shaped rubber-like elastic body, and its inner peripheral surface is
1A is vulcanized and adhered to the outer peripheral surface of the upper spacer 5.
Is vulcanized and bonded to the inner peripheral surface of the movable member 11, 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 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
When 1 is displaced in the vertical direction, abrasion powder is likely to be generated at a contact portion between the leaf spring 13 and the partition wall forming member 11A. At this time, the leaf spring 13 is formed of a spring steel material, and the movable member 11
Since the whole is made of iron, the generated abrasion powder tends to be magnetized by abrasion. When the magnetically abraded powder falls on the magnetic path forming member 11B, the magnetic field of the magnetic path forming member 11B is disrupted, and the yoke 10
There is a possibility that the edge of the magnetic path forming member 11B comes into contact with the surface of the yoke 10A when approaching the permanent magnet 10C on A.

Further, since the movable member 11 made of iron is heavy, the resonance frequency determined by the leaf spring 13 becomes low. For this reason,
The controllable frequency becomes low, which hinders designing a control system for favorably reducing vibration.

Therefore, in practice, in order to reduce the weight of the movable member 11, a measure is taken to reduce the shape of the partition wall forming member 11A.
When the shape of the seal member 16 is reduced, the outer diameter dimension is reduced, and the width dimension (dimension a in FIG. 4) of the seal member 16 must be increased. As described above, when the width of the seal member 16 is increased, the seal member 16
Pressure receiving area becomes large. Therefore, even if the movable member 11 is displaced in the vertical direction to change the volume of the fluid chamber 15, the change in the volume does not act on the expansion direction spring of the support elastic body 3 and is absorbed by the elastic deformation of the seal member 16. There is a possibility that it will. Therefore, the volume change of the fluid chamber 15 is
The vertical stroke of the movable member 11 must be increased in order to act on the expansion direction spring. However, if the large electromagnetic actuator 10 is mounted and the stroke is increased, it becomes undesirable in terms of installation space and cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the unsolved problem of the preceding vibration isolator and supporting device, and the displacement and movement of the movable member is improved by improving the material and shape of the movable member. It is an object of the present invention to provide an anti-vibration support device capable of obtaining a stable anti-vibration control characteristic without causing trouble.

[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 second member displaceable in a direction of changing a volume of the fluid chamber. A movable member elastically supported by the two members, and a force for displacing the movable member in response to a drive signal, supported by the second member so as to be located on the opposite side of the fluid chamber with respect to the movable member. The movable member is formed by integrally forming a partition wall forming member forming a part of a partition wall of the fluid chamber and a magnetic path forming member located on the electromagnetic actuator side. And the configuration The wall forming member is formed of a non-magnetic material, and the magnetic path forming member is formed of a magnetic material. On the other hand, the movable member is formed on a surface of the partition wall forming member opposite to the fluid chamber. The second member is elastically supported via a leaf spring in contact with the inner peripheral portion.

According to a second aspect of the present invention, in the anti-vibration support device of the first aspect, the partition wall forming member is formed of a lightweight non-magnetic material such as an aluminum alloy.
According to a third aspect of the present invention, in the vibration damping support device according to the first or second aspect, the thickness of the partition wall portion is connected to the magnetic path forming member while facing the fluid chamber. The thickness is reduced, and an annular rib is protruded from the outer periphery of the partition toward the direction of displacement of the movable member.

According to a fourth aspect of the present invention, in the vibration damping support device according to any one of the first to third aspects, the partition wall forming member and the magnetic path forming member may be formed of an aluminum alloy bolt. Connected to each other via lightweight bolts.

According to a fifth aspect of the present invention, in the vibration damping support device according to any one of the first to third aspects, a connecting projection is formed on the partition wall forming member formed of a lightweight material such as an aluminum alloy. Forming a fitting hole in the magnetic path forming member, fitting the connecting protrusion in the fitting hole, and caulking an end of the connecting protrusion protruding through the fitting hole. By fixing, the partition wall forming member and the magnetic path forming member were connected to each other.

Further, the invention described in claim 6 is the first invention.
In the vibration isolating support device according to any one of (1) to (5), between an outer peripheral surface of the partition wall forming member and an inner peripheral surface of the second member,
The seal member was fixed over the entire circumference.

[0020]

According to the first aspect of the present invention, the partition wall forming member constituting the movable member is formed of a non-magnetic material, and the magnetic path forming member is formed of a magnetic material. Even if the abrasion powder generated at the contact portion between the peripheral portion and the partition wall forming member is worn, the abrasion powder does not take on magnetism. As a result, even if the abrasion powder falls on the magnetic path forming member, there is no possibility of disturbing the magnetic field of the magnetic path forming member, and the contact of the movable member with the yoke of the electromagnetic actuator can be prevented.

According to the second aspect of the present invention, the effect of the first aspect can be obtained, and the weight of the movable member can be reduced by forming the partition wall forming member from a lightweight non-magnetic material. Therefore, the resonance frequency determined by the leaf spring becomes a low value, and the controllable frequency becomes a high value, which is advantageous in designing a control system for favorably reducing vibration.

According to the third aspect of the present invention, the effect of the first or second aspect can be obtained, and the partition wall forming member is connected to the magnetic path forming member while facing the fluid chamber. Since the thickness of the partition is made thinner and an annular rib protrudes from the outer periphery of the partition toward the direction of displacement of the movable member to further reduce the weight of the movable member, a large electromagnetic actuator is provided. A sufficient supporting force can be obtained without using the support.

According to the fourth and fifth aspects of the present invention, since the weight of the connecting portion between the partition wall forming member and the magnetic path forming member is reduced, the same effects as those of the first to third aspects can be obtained. it can.

Further, according to the invention described in claim 6, the effects described in claims 1 to 5 can be obtained, and
Since the weight of the partition wall forming member of the present invention can be reduced without reducing the outer diameter of the partition wall forming member as in the conventional device, the outer peripheral surface of the partition wall forming member of the present invention and the inner circumference of the second member can be reduced. A seal member fixed over the entire circumference between the
The shape can be set so that the pressure receiving area with respect to the fluid chamber becomes small. As a result, even if the movable member is displaced in the vertical direction and the volume of the fluid chamber changes, there is no possibility that the change in the volume is absorbed by the elastic deformation of the seal member. Then, when the seal member is fixed between the annular rib of the partition wall forming member and the second member as in the above-described claim 3, the seal member has a larger volume than the conventional device. Thereby, even if a seal member having a large spring constant in the vertical direction is not selected,
The sealing member does not decrease in durability against elastic deformation caused by vertical displacement of the movable member. Further, there is an advantage that the characteristics of the force generated by the electromagnetic actuator can be determined by considering only the spring constant of the leaf spring, ignoring the small spring constant of the seal member.

[0025]

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. A vehicle body composed of a suspension member and the like is provided via an anti-vibration support device (active engine mount) 20 in which an engine 17 can generate an active support force according to a drive signal. 18 supported. Actually, between the engine 17 and the vehicle body 18, in addition to the vibration isolation support device 20, the engine 17 and the vehicle body 18
There are also a plurality of engine mounts that generate passive supporting force according to the relative displacement between them. As a passive engine mount, for example, a normal engine mount that supports a load with a rubber-like elastic body, or a known fluid-filled mount in which a fluid is sealed inside a rubber-like elastic body so that a damping force can be generated. An insulator or the like can be applied.

Next, what is shown in FIG.
In the apparatus case 43, mounting parts such as an outer cylinder 34, an orifice constituting member 36, an inner cylinder 37, and a supporting elastic body 32 are built in, and a main fluid is provided below these mounting parts. An electromagnetic actuator 52 for displacing the elastically supported movable member in a direction in which the volume of the main fluid chamber changes while forming a part of the partition of the chamber;
And a load sensor 54 for detecting the vibration state of the vehicle.

That is, the anti-vibration support device 20 of the present 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.

An outer cylinder 34 is fitted on the outside of the orifice member 36. The outer cylinder 34 has an inner peripheral diameter that is equal to the upper and lower cylindrical portions 36a and 36b of the orifice member 36.
The cylindrical member has the same dimension as the outer diameter of the orifice and the length in the axial direction is set to the same dimension as the orifice constituting member 36. Further, an opening 34a is formed in the outer cylinder 34,
The outer periphery of a diaphragm 42 made of a rubber thin film is coupled to the opening edge of the opening 34a to close the opening 34a and swell 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 between the outer cylinder 34 and the orifice constituting member 36 in the circumferential direction. The diaphragm 42 is disposed in the space in a swelled state.

The inner cylinder 37 fitted inside the orifice constituting member 36 has a minimum diameter tubular portion 37a formed to have a smaller diameter than the small diameter tubular portion 36c of the orifice constituting member 36. Annular portions 37b and 37c are formed radially outward at the upper and lower ends. The upper annular portion 37b has an outer diameter slightly smaller than the small-diameter cylindrical portion 36c of the orifice constituting member 36, and the lower annular portion 36c has a lower cylindrical portion 36b of the orifice constituting member 36.
The smaller-diameter cylindrical portion 37a
A second opening 37d is formed at the bottom.

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

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 formed. 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 the lower part of the device case 43, and the spacer 70
The movable member 78 is arranged at the upper part inside, and the electromagnetic actuator 52 is arranged at the lower part inside the spacer 70.

In other words, the spacer 70 is
This is a member obtained by vulcanizing and bonding a diaphragm 70c made of a rubber-made thin film elastic body between a and the lower cylindrical body 70b. In addition, the electromagnetic actuator 52 includes a cylindrical yoke 5 having an external appearance.
2a, an annular exciting coil 52b buried on the upper end surface side of the yoke 52a, and a permanent magnet 52c having a magnetic pole fixed vertically in the center of the upper surface of the yoke 52a. The upper yoke member 53a and the lower yoke member 53b are vertically divided into two parts, and the lower outer circumference of the upper yoke member 53a and the upper outer circumference of the lower yoke member 53b are scraped to form a circumferentially continuous recess 52d. Are formed. The diaphragm 70c of the spacer 70 bulges toward the recess 52d, and an air chamber 70d is defined in a portion surrounded by the inner peripheral surface of the device case 43 and the diaphragm 70c. An air hole 43b is formed at a position facing 70d, and the air chamber 70d communicates with the atmosphere via the air hole 43b. 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. Note that a piezoelectric element, a magnetostrictive element, a strain gauge, or the like can be applied as the load sensor 64, and the detection result of this sensor is supplied to the controller 25 as a residual vibration signal e as shown in FIG. Has become.

On the other hand, a seal ring 72 for fixing a seal member, a support ring 74 for supporting a leaf spring, and a gap holding ring 76 are arranged in an upper portion in the spacer 70. The movable member 78 is arranged so that it can be displaced.

The movable member 78 includes a partition wall forming member 78A made of an aluminum alloy and having a circular appearance, and a magnetic path forming member 78B formed of a circular shape having a larger diameter than the partition wall forming member 78A and made of iron. And the partition wall forming member 7 located farther from the electromagnetic actuator 52.
A bolt hole 80a is formed in the axis of 8A, and a lightweight bolt 80 made of an aluminum alloy that penetrates a magnetic path forming member 78B close to the electromagnetic actuator 52 is screwed into the bolt hole 80a. Forming member 7
8B has an integral structure.

The magnetic path forming member 78B and the electromagnetic actuator 52 are provided on the outer peripheral edge of the magnetic path forming member 78B.
A stopper member 78C made of a ring-like rubber-like elastic body for preventing a direct collision with the stopper 78C is fixed.

A ring-shaped continuous leaf spring receiving space is defined between the partition wall forming member 78A and the magnetic path forming member 78B, and the movable member 78 is elastically supported in the leaf spring receiving space. Is accommodated. That is, the inner peripheral portion of the leaf spring 82 is
8A is supported from below, and the outer peripheral portion of the leaf spring 82 is formed on the inner peripheral surface of the support ring 74.
4a supports the movable member 78 from below.
Are elastically supported by the device case 43 via a leaf spring 82.

The partition wall forming member 78A is connected to the fluid chamber 8
The wall thickness of the partition wall 80c facing the partition wall 4 is reduced.
0c is a member formed with an annular rib 80b protruding upward from the outer periphery. The upper surface of the partition wall forming member 78, the lower surface of the support elastic body 32, and the inner peripheral surface of the inner cylinder 37 form the fluid chamber 8.
4 is formed, and a fluid is sealed in the fluid chamber 84.
However, in order to prevent leakage of the fluid from the fluid chamber 84 to the leaf spring accommodating space accommodating the leaf spring 82, there is a gap between the outer peripheral side of the partition wall forming member 78A and the inner peripheral side of the seal ring 72. , The seal member 86 is fixed.

The seal member 86 is a ring-shaped rubber-like elastic body, and allows the movable member 78 to be vertically displaced relative to the seal ring 7 and the apparatus case 43 by its elastic deformation.

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 the reference signal x, the controller 25 performs a synchronous filtered operation, 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. That is, in a state where the drive signal y is not supplied to the excitation coil 52b, the movable member 78 including the magnetic path forming member 78B is at a neutral position where the support force of the leaf spring 82 and the magnetic force of the permanent magnet 52c are balanced. Will be displaced. When the drive signal y is supplied to the excitation coil 52b in this neutral state, if the magnetic force generated in the excitation coil 52b by the drive signal y is in the opposite direction to the magnetic force of the permanent magnet 52c, the movable member 78 It is displaced in a direction in which the clearance with the actuator 52 increases. Conversely, the magnetic force generated in the exciting coil 52b is
If the direction is the same as the magnetic force, the movable member 78 is displaced in a direction in which the clearance with the electromagnetic actuator 52 decreases.

As described above, the movable member 78 can be displaced in both the forward and reverse directions, and when the movable member 78 is displaced, the fluid chamber 84 is displaced.
The partition wall forming member 78A forming a part of the partition wall is also displaced,
As a result, the volume of the fluid chamber 84 changes, and the expansion spring of the support elastic body 32 is deformed by the change in the volume, so that the anti-vibration support device 20 generates an active support force in both forward and reverse directions.

Each filter coefficient W _i of the adaptive digital filter W serving as the drive signal y is 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.

In this embodiment, the movable member 78 includes a non-magnetic partition wall forming member 78A made of an aluminum alloy and a magnetic magnetic path forming member 78B made of an iron alloy.
, The leaf spring 82 and the partition wall forming member 78
Even if the abrasion powder generated at the contact portion with A wears, it does not take on magnetism. As a result, even if the abrasion powder falls on the magnetic path forming member 78B, there is no possibility that the magnetic field of the magnetic path forming member 78B will be disturbed.
Contact of the movable member 78 with the movable member 78 can be prevented. In other words, when the electromagnetic actuator 52 attracts the movable member 78, the wear powder does not disturb the magnetic field of the magnetic path forming member 78B, so that the movable member 78 is prevented from being inclined and is separated from the electromagnetic actuator 52 substantially horizontally. 78 is the yoke 52
a, it is possible to reduce the possibility of one-sided contact with the yoke 10A.

Also, since the partition wall forming member 78A is made of an aluminum alloy to reduce the weight of the movable member 78, the resonance frequency determined by the leaf spring 82 has a low value, and the controllable frequency has a high value. This is advantageous in designing a control system for favorably reducing vibration.

Further, since the partition wall forming member 78A and the magnetic path forming member 78B are connected via the lightweight bolt 80 made of aluminum alloy, the weight of the movable member 78 can be further reduced. Since the lines of magnetic force do not pass through the center of the lower surface of the movable member 78, even if the lightweight bolt 80 is a non-magnetic material, it does not adversely affect the vertical displacement of the movable member 78.

In this embodiment, the partition wall forming member 78A having the annular rib 80b projecting upward from the outer periphery of the partition wall portion 80c is formed by reducing the thickness of the partition wall portion 80c facing the fluid chamber 84. Since it is used, the weight can be reduced without reducing the outer diameter of the partition wall forming member as in the improvement of the conventional device shown in FIG. Since the width dimension of the seal member 86 is reduced and the pressure receiving area of the seal member 86 with respect to the fluid chamber 84 is also small, even if the movable member 78 is displaced in the vertical direction and the volume of the fluid chamber 84 changes, Is not absorbed by the elastic deformation of the seal member 86. As a result, the large electromagnetic actuator 10
It is extremely advantageous to generate a sufficiently large supporting force without using any.

Further, since the seal member 86 is fixed between the outer periphery of the rib 80b of the partition wall forming member 78A and the seal ring 72, the seal member 86 has a larger volume than the conventional device shown in FIG. Become. As a result, even if a member having a large vertical spring constant is not selected, the seal member 86 does not decrease in durability against elastic deformation due to vertical displacement of the movable member 78. In addition, there is an advantage that the characteristics of the force generated by the electromagnetic actuator 52 can be determined by ignoring the small spring constant of the seal member 86 and considering only the spring constant of the leaf spring 82.

Here, in the present embodiment, the connecting bolt 30 corresponds to the first member, and the orifice constituting member 3
6, the inner cylinder 37, the device case 43, the seal ring 72, the support ring 74, and the gap holding ring 76 correspond to the second member.

FIG. 3 is a view showing a second embodiment of the present invention. In this embodiment, similarly to the first embodiment, an anti-vibration support device 20 according to the present invention is applied to a vehicle. Since the overall configuration is the same as that of the first embodiment, its illustration and description are omitted. Further, FIG.
3 is a cross-sectional view showing a configuration of a vibration-proof supporting device 20 in the same manner as FIG. 2 of the embodiment, and the same members and portions as those in FIG.

That is, in this embodiment, the connecting projection 80d is formed on the partition wall forming member 78A, and the magnetic path forming member 7 is formed.
8B is formed with a fitting hole 80e. And the fitting hole 8
By caulking and fixing the lower end of the connecting projection 80d internally fitted to the upper part 0e from above, the partition wall forming member 78A and the magnetic path forming member 78B are connected to each other. Other configurations are the same as those of the first embodiment.

With such a configuration, the partition wall forming member 78A and the magnetic path forming member 78B are integrated with each other using the aluminum alloy connecting projections 80d instead of the lightweight bolts 80 of the first embodiment. The weight of the movable member 78 can be reduced. As a result, the resonance frequency determined by the leaf spring 82 becomes a low value and the controllable frequency becomes a high value, which is advantageous in designing a control system for favorably reducing vibration. Since the lines of magnetic force do not pass through the central portion of the lower surface of the movable member 78, even if the connecting protrusion 80d is a non-magnetic material, it does not adversely affect the vertical displacement of the movable member 78.

Note that the partition wall forming member 78 of each of the above embodiments is used.
A, the bolt hole 80a is made of an aluminum alloy, but if it can be reduced in weight and is a non-magnetic material,
For example, a similar effect can be obtained by using a titanium alloy or the like as a material. However, aluminum alloys are suitable in terms of material costs.

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 an anti-vibration support device according to the first embodiment.

FIG. 3 is a cross-sectional view illustrating a configuration of an anti-vibration support device according to a second embodiment.

FIG. 4 is a cross-sectional view showing a configuration of a preceding vibration isolation support device.

[Explanation of symbols]

 Reference Signs List 20 anti-vibration support device 30 connecting bolt (first member) 32 supporting elastic body 36 orifice constituting member (second member) 37 inner cylinder (second member) 43 device case (second member) 52 electromagnetic actuator 72 seal ring (first member) 2 member) 74 support ring (second member) 76 gap holding ring (second member) 78 movable member 78A partition wall forming member 78B magnetic path forming member 80 lightweight bolt 80b rib 80c partition wall portion 80d connecting protrusion 80e fitting hole 82 plate Spring 84 Fluid chamber 86 Seal member

Claims (6)

[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 therein and having a fluid sealed therein, and the second fluid chamber being displaceable in a direction of changing the volume of the fluid chamber.
A movable member elastically supported by a member, and a force generated by the second member so as to be located on a side opposite to the fluid chamber with the movable member interposed therebetween and displacing the movable member in response to a drive signal; An electromagnetic actuator, comprising: a movable member, a partition wall forming member that forms a part of a partition wall of the fluid chamber, and a magnetic path forming member that is located on the electromagnetic actuator side; The partition wall forming member is formed of a non-magnetic material, and the magnetic path forming member is formed of a magnetic material, while the movable member is inverted with respect to the fluid chamber of the partition wall forming member. An anti-vibration support device, wherein the second member is elastically supported via a leaf spring whose inner peripheral portion is in contact with a surface facing the side. 2. The anti-vibration support device according to claim 1, wherein the partition wall forming member is formed of a lightweight non-magnetic material such as an aluminum alloy. 3. The partition wall connecting the magnetic path forming member with the partition wall forming member facing the fluid chamber is formed with a small thickness, and a displacement direction of the movable member from the outer periphery of the partition wall portion. The vibration isolating support device according to claim 1 or 2, wherein an annular rib is protruded toward the support. 4. The partition forming member and the magnetic path forming member are connected to each other via a lightweight bolt such as a bolt made of aluminum alloy.
The vibration isolation support device according to any one of the above. 5. A connecting projection is formed on the partition wall forming member formed of a lightweight material such as an aluminum alloy, and a fitting hole is formed on the magnetic path forming member, and the connecting projection is formed on the fitting hole. The partition wall forming member and the magnetic path forming member are connected to each other by caulking and fixing an end of the connection protrusion projecting through the fitting hole. Item 4. An anti-vibration support device according to any one of Items 1 to 3. 6. An outer peripheral surface of said partition wall forming member and said second peripheral surface.
6. An anti-vibration support device according to claim 1, wherein a seal member is fixed over the entire periphery between the inner peripheral surface of the member and the inner peripheral surface of the member.