JP3409684B2 - Anti-vibration support device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supporting a vibration body such as a vehicle engine while supporting it on a support body such as a vehicle body, and has a structure in which a displacement amount of a movable member is not influenced by an air spring. The present invention relates to an anti-vibration support device.

[0002]

2. Description of the Related Art As a prior art of this kind, there is an anti-vibration supporting device described in, for example, Japanese Patent Laid-Open No. 9-273585.

That is, a vibration isolating support device as a prior art will be described with reference to FIG. 5. The vibration isolating support device 1 is a flat plate-shaped fixing member 2 fixed to the vibrating body side of an engine or the like.
A bolt 2a for mounting on the engine is integrally provided on the upper surface of the fixing member 2, and the central portion of the upper surface of the support elastic body 3 is vulcanized and adhered to the rear surface of the fixing member 2. ing.

The support elastic body 3 is a rubber-like elastic body having a thick-walled circular shape whose central portion is raised above the peripheral edge portion, and its outer peripheral surface is vulcanized to the inner peripheral surface of the upper end portion of the orifice constituting member 4. It is glued. The orifice constituting member 4 is disposed inside a cylindrical device case 9 together with the annular seal ring 5, the annular gap retaining ring 6, the cylindrical spacer 7 and the electromagnetic actuator 8.
A load sensor 10 for detecting residual vibration necessary for vibration reduction control is disposed below the electromagnetic actuator 8, and a lower lid 11 covers the load sensor 10 from below.
Is provided. Then, the lower end of the device case 9 is caulked and fixed toward the outer periphery of the lower lid 11, so that each component is built in the device case 9.

Here, the electromagnetic actuator 8 includes a cylindrical iron yoke 8a, an annular exciting coil 8b having an axis fixed vertically on the upper surface of the yoke 8a, and a pole at the center of the upper surface of the yoke 8a. And a permanent magnet 8c which is fixed in the vertical direction. Yoke 8a includes an upper yoke member 8a ₁ of annular, has a half structure of the lower yoke member 8a ₂ having a solid cylindrical part in fixing the permanent magnet 8c to the central portion, an annular these outer peripheral surfaces Recess 8a ₃
Are formed.

The spacer 7 is a member in which the diaphragm 12 is integrally fixed in the circumferential direction of the inner peripheral surface of the spacer 7, and the recess 8a ₃ of the yoke 8a is formed by inserting the diaphragm 12 into the recess 8a ₃ of the yoke 8a. With the surface
A diaphragm chamber (hereinafter referred to as an actuator-side diaphragm chamber) 15 is formed between them. And the dress
By forming the air holes in the mounting case 9 and the spacer 7,
The outer peripheral surface of the diaphragm 12 is in contact with the atmosphere.

The seal ring 5 and the gap holding ring 6 sandwich and support the outer circumference of a disk-shaped leaf spring 13, and a movable lower portion of the center of the leaf spring 13 is made of magnetizable metal such as iron. The member 14 is fixed, and a gap having a predetermined distance is provided between the movable member 14 and the permanent magnet 8c. Further, a fluid chamber 15 is formed by the upper surface of the leaf spring 13, the lower surface of the support elastic body 3, and the inner peripheral surface of the orifice component member 4, and the fluid is enclosed in the fluid chamber 16 .

In the vibration isolating support device 1 having such a structure, the electromagnetic force generated by the electromagnetic actuator 8 is changed by the drive signal supplied from the controller (not shown), and the movable member 14 is displaced in the vertical direction to cause the fluid. Since the volume of the chamber 16 changes and the volume change acts on the expansion direction spring of the support elastic body 3, an active support force is generated between the fixing member 2 and the device case 9. Therefore, by appropriately generating the drive signal to be supplied to the electromagnetic actuator 8 according to the adaptive algorithm or the like, the vibration transmitted from the fixed member 2 side to the outer cylinder device case 9 side can be canceled or reduced by the supporting force. The vibration level on the support side can be reduced.

An air chamber (a space indicated by reference numeral S ₁ in FIG. 5) is formed between the upper surface of the yoke 8a and the leaf spring 13, and the air in the air chamber S ₁ has an air temperature and Since the spring acts as an air spring whose spring constant changes according to the volume change according to the atmospheric pressure, the displacement amount of the movable member 14 may change as the air temperature and the atmospheric pressure change. However, according to the above configuration, the air chamber S ₁ has the air passage around the exciting coil 8b, the upper yoke member 8a ₁ and the lower yoke member 8a.
Actuating the diaphragm 12 through the air passage between a ₂
It communicates with the diaphragm chamber 15 on the eta side. And
The outer peripheral surface of the diaphragm 12 has a device case 9 and a space.
Since it is in contact with the atmosphere due to the air holes formed in the
Even if the air temperature or the atmospheric pressure changes, the spring constant of the air in the air chamber S ₁ is always constant and the displacement amount of the movable member 14 is constant, so that stable control characteristics can be obtained.

[0010]

[SUMMARY OF THE INVENTION Incidentally, the electromagnetic actuator 8, as shown in FIG. 6, place the exciting coil 8b on the lower yoke member 8a _2, then the spacer 7 so as to surround the lower yoke member 8a ₂ Out, and then
The upper yoke member 8a ₃ is assembled by fitting the upper yoke member 8a ₃ inside the spacer 7 so as to be located above the lower yoke member 8a ₂ . Since this uses a cylindrical spacer 7 having a diaphragm 12 fixed to the inner peripheral surface, an annular recess 8a ₃ is formed before the upper and lower yoke members 8a ₁ and 8a ₂ are integrated. This is because the diaphragm 12 must be arranged at the position. However, in the vibration-damping support device 1 including the electromagnetic actuator 8 having this structure, the number of parts to be assembled increases, and the number of assembling steps also increases accordingly. Therefore, it is necessary to spend a lot of time until the assembly is completed.

The permanent magnet 8 of the electromagnetic actuator 8
If the movable member 14 facing c is not coaxially opposed to the electromagnetic actuator 8 (the position where the electromagnetic actuator 8 and the movable member 14 coincide with each other at the axis P ₀ ), the electromagnetic force of the exciting coil 8 b has the same radius. Since it does not act in the circumferential direction and strokes in the up-and-down direction without maintaining the horizontal state with respect to the electromagnetic actuator 8, there is a possibility that the vibration control characteristics may vary. Therefore, in order to prevent variations in the anti-vibration control characteristics of all of the manufactured anti-vibration support devices, the movable member 14 is configured to support the seal ring 5, the gap holding ring 6 and the leaf spring 13 supporting the movable member 14 by the shaft. Heart P ₀
Must be inserted into the device case 9 while repeatedly performing fine adjustment so that As described above, the conventional anti-vibration support device 1 has a problem in terms of assembly efficiency.

The present invention has been made by paying attention to the unsolved problem of the preceding anti-vibration support device, and obtains highly accurate anti-vibration support characteristics while significantly improving the assembly efficiency. It is an object of the present invention to provide an anti-vibration support device that can be used.

[0013]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a supporting elastic body interposed between a vibrating body and a supporting body, and a device case connected to the supporting elastic body. A fluid chamber defined in the support elastic body and having a fluid enclosed therein; a movable member displacing in the direction of changing the volume of the fluid chamber; and a movable member disposed in the device case according to a drive signal. An electromagnetic actuator that generates a force to displace the movable member, the electromagnetic actuator
In addition, a diaphragm chamber is provided in the inner space, and the atmosphere is exposed to the outer surface.
Place the diaphragm to touch, and place it in front of the diaphragm chamber.
Air communicating with the internal space where the movable member is displaced
In the anti-vibration support device having a passage, the electromagnetic actuator includes a permanent magnet that attracts the movable member to one end surface of a yoke having a solid cylindrical shape, and an electromagnetic force is applied to the permanent magnet in the forward and reverse directions. An exciting coil to be generated is arranged, an annular recess is formed on the side peripheral surface of the yoke, and the recess and the air passage are communicated with each other. The diameter is the same as the diameter of the side peripheral surface of the yoke. A spacer including a first cylinder and a second cylinder having inner diameters and a cylindrical diaphragm fixed between axial end portions of the cylinders is provided in a state where the spacer is bulged outward. The first cylinder is externally fitted to the side peripheral surface of the electromagnetic actuator, whereby the first cylinder is disposed closer to the one end surface side than the recess, and the second cylinder is sandwiched between the recesses of the first cylinder. The diaphragm installed on the opposite side The arm is opposed to the concave portion, further, the formation of the diaphragm chamber side peripheral surface of the yoke by bulging the diaphragm in the recess.

According to a second aspect of the present invention, in the vibration-damping support device according to the first aspect, the first cylindrical body is provided on a side peripheral surface of the electromagnetic actuator so as to project from one end surface of the yoke. A cylinder having a cylindrical support ring that is externally fitted and elastically supports the movable member via a leaf spring, and a seal member that prevents fluid from leaking from the fluid chamber to the electromagnetic actuator side. The outer diameter dimension of both the shaped seal ring and the inner diameter dimension of the first cylinder were set, and the support ring and the seal ring were fitted in the first cylinder.

Further, the invention of claim 3 is the same as that of claim 2.
In the anti-vibration support device described above, the outer diameter of the cylindrical gap holding member disposed so as to abut against the one end surface of the yoke such that the movable member faces the one end surface so as to face the one end surface. The size was set to be the same as the inner diameter of the first cylinder, and this gap holding member was fitted in the first cylinder.

[0016]

According to the first aspect of the present invention, the first cylindrical body and the second cylindrical body having the same inner diameter as the diameter of the side peripheral surface of the yoke are set.
A spacer including a tubular body and a tubular diaphragm fixed between axial end portions of the tubular body is externally fitted to the side peripheral surface of the electromagnetic actuator in a state where the diaphragm is bulged outward, and The cylindrical body is disposed on one end surface side of the concave portion formed on the side peripheral surface of the yoke, and the second cylindrical body is sandwiched between the concave portion and the first cylindrical body.
The diaphragm chamber can be formed by a simple assembly in which the diaphragm is arranged on the opposite side of the cylindrical body so as to face the recess, and the diaphragm is swollen in the recess. Compared with the conventional device that integrates the electromagnetic actuator and the spacer,
It is possible to reduce the number of parts to be assembled and the number of assembling steps accordingly. Therefore, according to the present invention, the assembly of the anti-vibration support device can be completed in a short time.

According to the second aspect of the present invention, the first cylindrical body is externally fitted to the side peripheral surface of the electromagnetic actuator so as to project from one end surface of the yoke, while the support ring and the seal ring are provided. Since the support ring and the seal ring can be arranged coaxially with the electromagnetic actuator only by fitting them in one tubular body, it is not necessary to adjust the position of the movable member. Therefore, since fine adjustment work such as alignment is reduced, the assembling efficiency can be improved as compared with the conventional anti-vibration supporting device.

Further, according to the third aspect of the invention, since the gap retaining ring is disposed coaxially with the electromagnetic actuator only by being fitted in the first cylindrical body, it is movable with the permanent magnet disposed on the yoke side. The gap between the member and the member can be set with high accuracy.

[0019]

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

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

Next, what is shown in FIG.
No. 0, which shows a specific configuration, the device case 43 has built-in mount components such as the outer cylinder 34, the orifice component 36, the inner cylinder 37, and the support elastic body 32. The electromagnetic actuator 52 that displaces the movable member 78 elastically supported while forming a part of the partition wall of 84 in the direction in which the volume of the fluid chamber 84 changes, and the load sensor 64 that detects the vibration state of the vehicle body member 28 are built-in. is doing.

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

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

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

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

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

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

The device case 43 has an upper end comb having a circular opening having a diameter smaller than the outer diameter of the upper end tube portion 36a at the upper end thereof.
The female portion 43c is formed and the upper end is caulked.
The shape of the case body that is continuous with the portion 43c is a cylindrical shape whose inner diameter is the same as the outer diameter of the outer cylinder 34 and continues to the lower end opening (the lower end opening is shown by the broken line in FIG. 2). The caulking portion shown by the solid line in FIG. 2 is formed by caulking the lower end opening inward in the radial direction after the mounting of all the mount components is completed.

Further, the outer cylinder 34 in which the supporting elastic body 32, the orifice component 36, the inner cylinder 37 and the diaphragm 42 are integrated is fitted into the inside of the lower end opening of the apparatus case 43, and the lower surface of the upper end crimped portion 43c . When the outer cylinder 34 and the upper end of the orifice forming member 36 are brought into contact with each other, they are arranged in the upper part of the device case 43. At this time, an air chamber 42c is defined in a portion surrounded by the inner peripheral surface of the device case 43 and the diaphragm 42. An air hole 43a is formed at a position facing the air chamber 42c. The air chamber 42c communicates with the atmosphere via 43a.

A cylindrical spacer 70 is fitted in the lower part of the device case 43, a movable member 78 is arranged in the upper part of the spacer 70, and an electromagnetic actuator 52 is arranged in the lower part of the spacer 70. Has been done.

The spacer 70, as shown in FIG.
From a cylindrical upper tubular body (first tubular body) 70a, a cylindrical lower tubular body (second tubular body) 70b, and a rubber thin-film elastic body vulcanized and bonded between upper and lower ends of these tubular bodies. And a substantially cylindrical diaphragm 70c.

The electromagnetic actuator 52 has a cylindrical yoke 52a, an annular exciting coil 52b arranged on the upper end surface side of the yoke 52a, and a magnetic pole fixed vertically to the center of the upper surface of the yoke 52a. Permanent magnet 52c
It consists of and.

As shown in FIG. 3, the yoke 52a is composed of an annular first yoke member 53a and a second yoke member 53b having a permanent magnet 52c fixed to a central cylindrical portion. These first and second yoke members 53
An annular recess 52d is continuously formed in the circumferential direction on the side peripheral surfaces of a and 53b, and an exciting coil 52b covered with a bobbin 53c is disposed in the annular space between them.

Further, the lower cylindrical body 7 of the spacer 70 described above.
0b is externally fitted to an annular step portion 53b ₁ formed on the outer periphery of the second yoke member 53b that is continuous with the recess 52d, and is coaxial with the second yoke member 53b (the axial center of the lower tubular body 70b and the second
And the axis of the yoke member 53b are) arranged so as to coincide with the axis P _1. In addition, the upper cylinder 7 of the spacer 70
0a is fitted onto the outer periphery of the first yoke member 53a and is coaxial with the first yoke member 53a (the axis of the upper cylinder 70a and the first yoke member 53a).
It is arranged so that the axis of the yoke member 53a coincides with the axis P ₁ . Here, only the lower end portion of the upper tubular body 70a is externally fitted to the outer periphery of the first yoke member 53a,
The upper end side is arranged so as to project upward from the yoke 52a.

Then, the upper and lower cylindrical bodies 70a, 70b
The diaphragm 70c in between is bulging toward the recess 52d, and the inner peripheral surface of the device case 43 and the diaphragm 70c.
An actuator-side diaphragm chamber 70d is defined in a portion surrounded by c and. Incidentally, in the apparatus casing 43 is an air hole 43b is formed at a position facing the actuator side diaphragm chamber 70d, the actuator side Daiafura
The outer periphery of the diaphragm 70c that does not define the chamber 70d
The surface is in contact with the atmosphere via the air hole 43b.

Returning to FIG. 2, between the lower surface of the yoke 52a and the lid member 62 provided with the vehicle body side connecting bolt 60, in order to detect residual vibration required for vibration reduction control, a load sensor is provided. 64 is interposed. 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. There is.

On the other hand, above the electromagnetic actuator 52, a seal ring 72 for fixing a seal member, a support ring 74 for supporting an outer peripheral portion of a leaf spring 82, which will be described later, from a lower end, and a permanent ring of the electromagnetic actuator 52. Magnet 52c
And a gap retaining ring 76 that sets a gap H between the movable members 78. The outer diameters of the seal ring 72, the support ring 74, and the gap retaining ring 76 are set to the same dimensions as the inner diameter of the upper cylinder body 70a of the spacer 70 described above, and the upper cylinder body protruding upward from the yoke 52a. A seal ring 72 in the body 70a,
All of the support ring 74 and the gap retaining ring 76 are fitted inside. A movable member 78 is arranged inside the seal ring 72, the support ring 74, and the gap holding ring 76 so as to be vertically displaceable.

The movable member 78 is a member composed of a disk-shaped partition wall forming member 78A and a magnetic path forming member 78B formed in a disk shape larger than the partition wall forming member 78A. A bolt hole 80a is formed in the shaft center of the partition wall forming member 78A located farther to the magnetic path forming member 78B closer to the electromagnetic actuator 52.
The movable member bolt 80 penetrating through is screwed into the bolt hole 80a to integrally connect the partition wall forming member 78A and the magnetic path forming member 78B.

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

In the partition wall forming member 78A, the wall thickness of the partition wall portion 80c facing the fluid chamber 84 is reduced so that the partition wall portion 80c is formed.
Is a member formed with an annular rib 80b protruding upward from the outer periphery of the. Then, 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 84.
Is formed, and the fluid is enclosed in the fluid chamber 84.

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

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

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

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

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

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

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

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

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

Further, the magnetic path forming member 78B of the movable member 78
An air chamber (a space indicated by reference numeral S ₂ in FIG. 2) is formed around the air chamber, and the air in the air chamber S ₂ acts as an air spring whose spring constant changes due to volume fluctuation according to temperature and atmospheric pressure. Therefore, the displacement amount of the movable member 78 may change as the air temperature and the atmospheric pressure change. However, in this embodiment, the air chamber S around the magnetic path forming member 78B is
₂ is a bobbin 53c covering the exciting coil 52b
Surrounding gap, first yoke member 53a, and second yoke portion
The gap between the joints of the material 53b and (the air indicated by the thick arrow in FIG. 2)
Through the passage) to the actuator side of the diaphragm 70c
It communicates with the diaphragm chamber 70d. And dia
Outer peripheral surface of the diaphragm 70c (actuator side diaphragm
The surface that does not define the chamber 70d) is formed by the air holes 43b.
Since it is in contact with the atmosphere, the spring constant of the air in the air chamber S ₂ is always constant and the displacement amount of the movable member 78 does not change even if the air temperature or the atmospheric pressure changes, so that stable control characteristics can be obtained. You can

Next, a part of the assembling procedure of the constituent members of the anti-vibration supporting device 20 will be described with reference to FIGS.
First, as shown in FIG. 3, the diaphragm 70c of the spacer 70 is deformed so as to bulge toward the outer peripheral sides of the upper and lower cylindrical bodies 70a and 70b. The spacer 70 is connected to the electromagnetic actuator 52 (excitation coil 52b) in which the first and second yoke members 53a and 53b are integrated.
The permanent magnet 52c is also integrated) from above. That is, the lower tubular body 70b is externally fitted to the step portion 53b ₁ of the second yoke member 53b, and the upper tubular body 70a is
Is fitted on the outer periphery of the first yoke member 53a, so that the spacer 70 is coaxially arranged on the electromagnetic actuator 52 (so that the shaft centers are aligned with the shaft center P ₁ ). The diaphragm 70 bulging toward the outer peripheral side at a position corresponding to the annular recess 52d of the yoke 52a.
The c is deformed so as to enter the annular recess 52d.

Next, a part of the upper cylindrical body 70b fitted on the electromagnetic actuator 52 projects from above the electromagnetic actuator 52. As shown in FIG. 4, a gap is formed in the inner peripheral portion of the projecting portion. The holding ring 76, the support ring 74 that supports the movable member 78 via the leaf spring 82, and the seal ring 72 to which the seal member 86 is fixed are fitted inside. At this time, the outer diameters of the seal ring 72, the support ring 74 and the gap retaining ring 76 are
It is set to the same size as the inner diameter of the upper cylinder 70a,
Because fitted into a state where the inner circumferential surface plane contact with the upper cylinder 70a, the shaft and coaxially of the electromagnetic actuator 52 (the axis of all the members to match the axis p ₁₎ is disposed.

Then, the electromagnetic actuator 52 and the spacer 70 located above the electromagnetic actuator 52.
The members such as the seal ring 72, the support ring 74, and the gap retaining ring 76, which are fitted in the upper cylindrical body 70b of the above, are assembled from the lower end opening of the apparatus case 43, and after the assembly is completed, the lower end opening is radially formed. By caulking inward, the caulking portion shown by the solid line in FIG. 2 is formed.

Therefore, according to this assembly, the upper cylinder 70a, the lower cylinder 70b, and the spacer 70 composed of the diaphragm 70c fixed between the upper and lower cylinders 70a and 70b, the diaphragm 70c bulges outward. The first and second yoke members 53a and 53b are integrally fitted to the electromagnetic actuator 52 from above, and the annular recess 52 of the yoke 52a is formed.
Since the diaphragm 70c facing the d can be simply arranged by deforming it toward the recess 52d side,
From the disassembled parts to the electromagnetic actuator 8 and the spacer 7
The number of parts to be assembled can be reduced, and the number of assembling steps can be reduced accordingly, as compared with the conventional device of FIGS. As a result, the assembly of the anti-vibration support device can be completed in a short time.

Further, the gap retaining ring 76 has an upper cylindrical body 70 protruding upward from the electromagnetic actuator 52.
Since it is arranged coaxially with the electromagnetic actuator 52 without being aligned with the axis P ₁ only by fitting it in b, the gap H between the permanent magnet 52c of the electromagnetic actuator 52 and the movable member 78 can be set with high accuracy. can do. Further, the seal ring and the support ring 74 are also coaxially arranged with the electromagnetic actuator 52 without aligning the axis P ₁ only by fitting the seal ring and the support ring inside the upper cylinder body 70b, so that the alignment of the movable member 78 can be adjusted. Is unnecessary. Therefore, since fine adjustment work such as alignment is reduced, the assembling efficiency can be improved as compared with the conventional anti-vibration supporting device.

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

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

[Brief description of drawings]

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

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

FIG. 3 is a diagram showing a method of incorporating an electromagnetic actuator and a spacer for providing a diaphragm chamber according to the present invention.

FIG. 4 is a view showing a method of assembling a seal ring, a support ring and a gap retaining ring according to the present invention.

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

FIG. 6 is a diagram showing a method of assembling an electromagnetic actuator and a spacer for providing a diaphragm chamber of a preceding anti-vibration support device.

[Explanation of symbols]

17 engine (vibrating body) 18 vehicle body (supporting body) 20 anti-vibration supporting device 32 supporting elastic body 43 device case 52 electromagnetic actuator 52a yoke 52b exciting coil 52c permanent magnet 52d annular recess 70 spacer 70a upper cylinder (first cylinder) ) 70b Lower cylinder (second cylinder) 70c Diaphragm 70d Actuator-side diaphragm chamber (diaphragm chamber) 72 Seal ring 74 Support ring 76 Gap holding ring 78 Movable member 82 Leaf spring 84 Fluid chamber 86 Seal member S ₂ Air chamber (Internal) Space) H gap

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-273585 (JP, A) JP-A-6-42574 (JP, A) JP-A-9-242812 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) F16F 13/06 F16F 13/26

Claims (3)

(57) [Claims] 1. A support elastic body interposed between the vibrating body and the support body, a device case connected to the support elastic body, and a fluid chamber defined in the support elastic body and having a fluid enclosed therein. a movable member that is displaced in a direction to vary the volume of the fluid chamber, wherein disposed within the apparatus case and an electromagnetic actuator for generating a force for displacing the movable member in response to the drive signal, the electromagnetic actuator , In the inner space
Diaphragm with a diaphragm chamber where the atmosphere contacts the outer surface
A ram is arranged and the diaphragm chamber and the movable member are
In an anti-vibration support device that is provided with an air passage that communicates with the internal space at a position, the electromagnetic actuator includes a permanent magnet that attracts the movable member to one end surface of a yoke having a solid cylindrical shape,
An exciting coil for generating an electromagnetic force in the forward and reverse directions is arranged with respect to the permanent magnet, an annular recess is formed on the side peripheral surface of the yoke, and the recess is in communication with the air passage . At the same time, a spacer including a first tubular body and a second tubular body set to have the same inner diameter dimension as the diameter dimension of the side peripheral surface of the yoke, and a tubular diaphragm fixed between axial end portions of these tubular bodies. , The outer peripheral surface of the electromagnetic actuator is externally fitted in a state where the diaphragm is bulged outward, whereby the first cylindrical body is disposed closer to the one end surface side than the concave portion, and the second cylindrical body is disposed. A body is disposed on the opposite side of the first tubular body with the concave portion sandwiched therebetween, the diaphragm is opposed to the concave portion, and the diaphragm is bulged in the concave portion to form a side surface of the yoke. to the formation of the diaphragm chamber Vibration isolation support system according to claim. 2. The first cylinder is externally fitted to the side peripheral surface of the electromagnetic actuator so as to project from one end surface of the yoke, while elastically supporting the movable member via a leaf spring. The outer diameters of the cylindrical support ring and the cylindrical seal ring fixing the seal member for preventing the fluid from leaking from the fluid chamber to the electromagnetic actuator side are defined by the inner diameter of the first cylindrical body. Set the same as the dimensions,
The anti-vibration support device according to claim 1, wherein the support ring and the seal ring are fitted in the first cylindrical body. 3. An outer diameter dimension of a cylindrical gap holding member, wherein the movable member is arranged in contact with the one end face of the yoke so as to face the one end face with a predetermined gap. Set the same as the inner diameter of the first cylinder,
The anti-vibration support device according to claim 2, wherein the gap holding member is fitted in the first cylindrical body.