JPH10220520A - Vibration control and support equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the vibration of a supporting body side in all the frequency domain by accurately applying the liquid-tight sealing to a load sensor which detects the residual vibration in the supporting body side. SOLUTION: In this equipment, gel-like silicone resin 78 is filled in the space surrounded by a yoke 52a and a cover member 57, where a load sensor 54 is sandwiched between them, inside an equipment case 43. Therefore, the centering of water from the exterior of the equipment into the load sensor 54 can be cut-off without fail by the gel-like silicone resin 78. Further, as a ring-shaped protrusion 72 formed on the lower surface 52a1 of the yoke 52a and a ring- shaped protrusion 76 formed on a bottom cover 58 contact the upper and the lower pressure plates of the load sensor 54 respectively without interposing the gel-like silicone resin 78 in between, the load sensor 54 can always detect the residual vibration accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration support device for supporting a vibrating body such as an engine of a vehicle, which generates periodic vibrations, while supporting it on a support such as a vehicle body. The present invention relates to an anti-vibration support device in which a load sensor for detecting a residual vibration on a body side is interposed between a yoke and a lid member of an electromagnetic actuator.

[0002]

2. Description of the Related Art In general, an engine mount, which is an anti-vibration support device used to support a power unit of a vehicle, mainly has good anti-vibration against idle vibration, engine shake, muffled sound vibration, noise vibration during acceleration, and the like. It is required that the vibration-proof function is exhibited. Among these various vibrations, the characteristics required of the vibration-proof support device in order to reduce the engine shake which is a vibration having a relatively large amplitude of about 5 to 15 Hz are as follows. Idle vibration, which has a relatively large amplitude of about 20 to 30 Hz while having a high dynamic spring constant and high damping, and muffled sound vibration, which is a relatively small and medium amplitude vibration of about 80 to 800 Hz. The characteristics required of the vibration isolation support device to reduce the noise and vibration during acceleration are a low dynamic spring constant and low attenuation. Therefore, it is difficult to prevent all vibrations with an engine mount including only a normal elastic body or a conventional liquid-filled engine mount.

[0003] In view of the above, an anti-vibration support device capable of actively damping and supporting a vibrating body such as an engine of an automobile has been disclosed in Japanese Patent Application Laid-Open No. 8-145114 filed earlier by the present applicant. There is technology.

In this prior art, as shown in FIG. 11, a vibrating body 1 and a supporting elastic body 3 interposed between the vibrating body 1 and a supporting body 2 are provided.
And a fluid chamber 4 defined by the support elastic body 3,
A movable member 5 comprising a fluid sealed in the fluid chamber 4, a leaf spring 5a forming a part of a partition of the fluid chamber 4, and a magnetizable magnetic path member 5b fixed at the lower center of the leaf spring 5a. An electromagnetic actuator 6 for displacing the movable member 5, a pulse signal generator 7 for detecting a state of generation of vibration in the vibrating body 1 and generating a reference signal, and a residual vibration signal for detecting residual vibration on the support 2 side. And a controller 9 that outputs a drive signal to the electromagnetic actuator 8 based on a reference signal and a residual vibration signal. In this vibration-proof support device, an actuator case 10 is interposed between the support elastic body 3 and the support 2, and the electromagnetic actuator 6 is disposed in the actuator case 10, and the load sensor 8 is The yoke 6A of the electromagnetic actuator 6 and the case member 10a arranged on the support 2 side in the actuator case 10 are sandwiched and built in.

According to the vibration isolating support device, when vibration is input from the vibrating body 1 side, the pulse generator 5 generates a reference signal corresponding to the reference signal and outputs it to the controller 7, and the residual vibration is applied to the supporting body 2. Is generated, the load sensor 6 outputs the residual vibration to the controller. Then, the controller 7 outputs a drive signal to the electromagnetic actuator 4, and the electromagnetic actuator 4 appropriately displaces the movable member 3, the volume of the fluid chamber 4 changes, and the vibration transmitting force to the support 2 side is “0”.
Is controlled so that

When the load sensor 6 is disposed outside the main body of the anti-vibration support device, the axial force at the time of bolt tightening must be taken into consideration. Need not be taken into consideration, and the load-bearing condition of the load sensor 6 is reduced, so that there is an effect that a small-sized load sensor can be used.

[0007]

By the way, the load sensor 6 built in the actuator case 10 has an upper pressure receiving plate that contacts the lower surface of the yoke 6A and a lower pressure receiving plate that contacts the upper surface of the case member 10a. A piezoelectric element that overlaps between the upper and lower pressure receiving plates,
The periphery of the piezoelectric element is formed by a molding material. And since the depolarization temperature (Curie point) of the piezoelectric element is usually 300 to 360 ° C., the molding temperature which does not thermally affect the piezoelectric element is 230 to 270.
A PBT resin (polybutylene terephthalate) having a temperature of ℃ is used.

However, the anti-vibration support device of FIG. 11 has a space 11 in the actuator case 10 and the load sensor 6 built therein. When the state is repeated, the PBT resin as the molding material is liable to be deteriorated by hydrolysis. As a result, the load sensor 6 cannot accurately detect the residual vibration, and the sensing performance may be reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and reliably performs a liquid-tight seal on a load sensor for detecting residual vibration on the support side to prevent vibration on the support side in all frequency ranges. It is an object of the present invention to provide an anti-vibration support device that can perform the vibration control.

[0010]

According to a first aspect of the present invention, there is provided an anti-vibration support apparatus, comprising: a vibrating body; a supporting elastic body interposed between the supporting bodies; and the supporting elastic body. Fluid chamber, a fluid sealed in the fluid chamber, a magnetizable movable member forming a part of a partition of the fluid chamber, an electromagnetic actuator for displacing the movable member, and a residual vibration on the support side. A load sensor for detecting
A controller that generates and outputs a control signal to the electromagnetic actuator in accordance with the detection result of the load sensor, an apparatus case is interposed between the support elastic body and the support, and the electromagnetic case is provided in the apparatus case. An actuator is disposed, the load sensor is disposed sandwiched between a yoke of the electromagnetic actuator and a lid member, and an outer peripheral locking portion of the lid member is fixed to an open end of the device case. In the support device, a space surrounded by the yoke and the lid member sandwiching the load sensor was filled with a gel-like silicone resin.

According to a second aspect of the present invention, in the vibration isolating support device according to the first aspect, the contact portion between the load sensor and the yoke and the contact portion between the load sensor and the lid member are provided with A resin passage communicating with the space filled with the gel silicon resin and preventing the gel silicon resin from staying in the contact portion is provided.

According to a third aspect of the present invention, in the vibration damping support device according to the second aspect, an annular protrusion is formed on one of the contact surfaces of the contact portions so that the resin passage has an annular shape. The other contact surface is brought into contact with the tip of the projection, and a cutout groove is formed in a part of the annular projection to communicate the inside and outside of the projection.

According to a fourth aspect of the present invention, in the anti-vibration support device of the second aspect, the resin passage is provided on one of the abutting surfaces of the abutting portion and radially from a central portion of the abutting surface. Are formed, and the other contact surface is in contact with the plurality of grooves so as to overlap with the plurality of grooves.

Further, the invention described in claim 5 is the same as the claim 2.
In the anti-vibration support device described in the above, the resin passage is formed on one contact surface of the contact portion with a plurality of ridges extending radially from a center portion of the contact surface. The other contact surface is in contact with the strip.

[0015]

According to the vibration isolating support device of the first aspect,
Since the space surrounded by the yoke and the cover member of the electromagnetic actuator sandwiching the load sensor is filled with the gel-like silicon resin, it is possible to reliably block moisture from entering the load sensor from outside the device. And even if the anti-vibration support device is used in an environment where high and low temperatures are repeated,
Deterioration of the load sensor can be prevented, and good sensing performance can be maintained for a long period of time.

Here, if the gel-like silicon resin stays in the contact portion between the load sensor and the yoke and in the contact portion between the load sensor and the lid member, the detection accuracy of the load sensor is reduced due to deterioration of the silicone resin such as settling and solidification. May be adversely affected.

Therefore, in the invention according to the second aspect, a resin passage communicating with the space surrounded by the yoke and the lid member to prevent the gel-like silicon resin from staying in the contact portion is provided. The gel-like silicone resin does not stay in the contact portion between the load sensor and the yoke and in the contact portion between the load sensor and the lid member. Therefore, the load sensor can accurately detect the residual vibration on the support body side.

According to the third aspect of the present invention, for example, the annular projection formed on the contact surface of the yoke contacts the contact surface of the load sensor, and the annular protrusion formed on the contact surface of the lid member. When the protrusions of the above contact the contact surface of the load sensor, the gel-like silicone resin does not stay between the contact surfaces of the load sensor and the yoke, and between the contact surfaces of the load sensor and the lid member. Residual vibration can be accurately detected.
In addition, since the gel-like silicon resin flows into the space between the yoke and the load sensor provided by the annular protrusion and the space between the lid member and the load sensor via the cutout groove provided on a part of the protrusion, the gel-like silicon resin flows reliably. There is no air pocket. Therefore, it is possible to prevent the deterioration of the liquid-tight seal structure of the silicone resin due to the thermal expansion and contraction of the air.

According to the fourth aspect of the present invention, for example, the contact surface of the load sensor contacts the plurality of radially extending grooves formed on the contact surface of the yoke, and the contact of the lid member. When the contact surface of the load sensor comes into contact with a plurality of radially extending grooves formed on the surface, gel-like silicon is provided between the contact surfaces of the load sensor and the yoke and between the contact surfaces of the load sensor and the lid member. Since the resin does not stay, the load sensor can always accurately detect the residual vibration. In addition, the space between the yoke and the load sensor, the space between the lid member and the load sensor,
Since the silicon resin that has passed through the groove flows into the groove reliably, no air pockets are generated, and the deterioration of the liquid-tight sealing structure of the silicon resin can be prevented.

Further, according to the invention, for example, the contact surface of the load sensor contacts a plurality of radially extending ridges formed on the contact surface of the yoke, and the contact member of the lid member. When the contact surface of the load sensor comes into contact with a plurality of radially extending ridges formed on the contact surface, a gel is formed between the contact surfaces of the load sensor and the yoke and between the contact surfaces of the load sensor and the lid member. Since the silicone resin does not stay, the load sensor can always detect the residual vibration accurately. In addition, since the silicone resin that has passed through the gap between the adjacent ridges flows into the space between the yoke and the load sensor and the space between the lid member and the load sensor reliably, no air pool is generated, and the silicone resin liquid is not generated. Deterioration of the tight seal structure can be prevented.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing a so-called active engine mount (hereinafter simply referred to as an engine mount) that actively reduces vibration transmitted from an engine side as a vibrating body to a vehicle body-side member as a support. ). The engine mount indicated by reference numeral 20 in FIG. 1 is disposed on the rear side of the vehicle body of the horizontally mounted engine 22, the upper part of which is attached to the bracket 24, and the lower part thereof is fixed to the vehicle body 26 by a member 28 as a support. Attached to.

As shown in FIG. 2, the engine mount 20 incorporates mounting parts such as an outer cylinder 34, an orifice constituting member 36, and a support elastic body 32 defining a main fluid chamber inside an apparatus case 43. At the bottom of these mounting parts,
An electromagnetic actuator 52 as an actuator for displacing a movable member elastically supported while forming a part of a partition wall of the main fluid chamber in a direction in which the volume of the main fluid chamber changes, and a load sensor 54 for detecting a vibration state of the member 28 This is a device that incorporates

That is, the engine mount 20
An engine-side connecting member 30 having the connecting bolt 30a fixed upward is provided. This engine side connecting member 30
A hollow cylindrical body 30b having an inverted trapezoidal cross section is fixed to a lower portion of the hollow cylindrical body 30b.

The lower side of the engine-side connecting member 30 and the hollow cylindrical body 3
The supporting elastic body 32 is fixed by vulcanization bonding so as to cover the periphery of Ob.

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 formed on the inner surface. I have. A lower end portion 32b of the resilient support member 32 which is a thin shape, the axis (hereinafter, referred to as the mounting 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 an annular concave portion is provided on the outer circumference. . An opening 36d is formed in the small-diameter cylindrical portion 36c. The lower end 32b of the support elastic body 32 is connected to the inner peripheral surface of the orifice constituting member 36, but this lower end 32b does not close the opening 36d, and the orifice constituting member 36 is not closed through the opening 36d. Inside and outside communicate with each other.

The orifice component 36 has an outer cylinder 3
4 is externally fitted, and the annular concave portion of the orifice constituting member 36 is surrounded by the inner peripheral surface of the outer cylinder 34, thereby defining an annular space in the circumferential direction. A diaphragm 42 is provided in the annular space.

That is, the inner diameter of the outer cylinder 34 is the same as the outer diameter of the upper cylindrical part 36a and the lower cylindrical part 36b of the orifice member 36, and the axial length is the same as that of the orifice member 36. Is a cylindrical member set to. The outer cylinder 34 is formed with a slit-shaped opening 34a facing the annular concave portion other than the position where the opening 36d is formed in the circumferential direction.

The diaphragm 42 is a thin film elastic body made of rubber, and is connected to the entire periphery of the opening edge of the opening 34a to close the opening 34a, and swells toward the annular recess of the orifice constituting member 36. It is arranged in the state where it did. The outer cylinder 34 is fitted inside the upper part of the device case 43.

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. 1).

Then, the outer cylinder 34 in which the supporting elastic body 32, the orifice constituting member 36 and the diaphragm 42 are integrated is fitted into the inside of the apparatus case 43 from the lower end opening thereof, and the outer cylinder 34 is attached to the lower surface of the upper end caulking section 43a. When the upper ends of the orifice components 36 come into contact with each other, they are disposed in the upper part of the device case 43. Here, an air chamber 42a is defined in a portion surrounded by the inner peripheral surface of the device case 43 and the diaphragm 42, and an air hole 42b is formed at a position facing the air chamber 42a. The air chamber 42a communicates with the atmosphere via the air chamber 42b.

Further, a leaf spring 4 integrated with a seal ring 44 and a magnetic path member 46 is provided at a lower portion in the apparatus case 43.
8, gap retaining ring 50, electromagnetic actuator 5
2. The load sensor 54 is sequentially incorporated, and after the incorporation of these components is completed, a gel-like silicon resin 78 is poured into the opening of the device case 43. Then, by closing the opening of the device case 43 with the cover member 57 and caulking the lower end of the device case 43 inward in the radial direction, the lower end caulked portion 43c is formed as shown by the solid line in FIG. I do.

That is, the seal ring 44 is an annular member having the same outer diameter as the inner diameter of the apparatus case 43 and having an inner diameter smaller than the lower end cylindrical portion 36b of the orifice constituting member 36. The upper surface of the seal ring 44 is
It is arranged in contact with the lower end of the.

The leaf spring 48 is a disk member whose outer diameter is slightly reduced from the inner diameter of the apparatus case 43. A magnetizable metal such as iron is provided on the lower center of the leaf spring 48. magnetic path member 46 made of is fixed to the mounting shaft P ₁ coaxially. In the present embodiment, a movable member is configured by the magnetic path member 46 and the leaf spring 48.

Then, the gap holding ring 50 is disposed in a state where the peripheral edge of the upper surface of the leaf spring 48 is in contact with the lower surface of the seal ring 44. This gap retaining ring 50
In order to provide a predetermined gap between the lower surface of the magnetic path member 46 and the upper surface of the electromagnetic actuator 52, the axial length is set to the axial length from the lower surface of the leaf spring 48 to the lower surface of the magnetic path member 46. It is an annular member set to a length obtained by adding the size of the gap to.

The electromagnetic actuator 52 abutting on the lower surface of the gap retaining ring 50 is surrounded by a cylindrical yoke 52a, an exciting coil 52b coaxially embedded on the upper end side of the yoke 52a, and an exciting coil 52b. And a permanent magnet 52c having a magnetic pole fixed vertically in the upper surface range of the yoke 52a.

Then, the yoke lower surface 52a₁In Figure 3
As shown, the axis P of the yoke 52a is ₁Predetermined around
An annular projection 72 is formed on the circumference of the radius.
A plurality of notch grooves 72a are formed at predetermined positions of the protrusion 72.
ing. The lower end surface of the projection 72 is
It contacts the upper pressure receiving plate 54a.

As shown in FIG. 2, a lid member 57 for covering the load sensor 54 from below is provided with a disc-shaped bottom lid 58,
A large-diameter tube portion 59 that rises from the outer peripheral edge of the bottom lid 58 toward the yoke 52a side;
9 and an outer peripheral locking portion 60 extending annularly outward from the upper peripheral edge in the radial direction. A plurality of press-fit holes are formed on the outer peripheral side of the bottom cover 58, and the vehicle-body-side connecting bolt 56 is press-fitted into these press-fit holes.

Then, on the inner surface 58a of the bottom lid 58,
As shown in FIG. 4, an annular projection 76 is formed on a circumference of a predetermined radius centered on the axis P ₁ of the bottom lid 58,
At a predetermined position of the projection 76, a plurality of notch grooves 76a are formed. The upper end surface of the projection 76 is
4 is in contact with the lower pressure receiving plate 54b.

As shown in FIGS. 5 and 6, the load sensor 54 has substantially annular upper and lower pressure receiving plates 54a and 54b on the upper and lower surfaces of an annular piezoelectric element 54c. It is superposed in a layered manner via an insulating plate 54e.
The central holes of the upper and lower pressure receiving plates 54a and 54b are filled with a sealing material 54f and closed. Also, PB
By molding with a molding material 54g made of T resin (polybutylene terephthalate), the piezoelectric element 54 is embedded in the molding material 54g, and the outer periphery of the upper and lower pressure receiving plates 54a and 54b is
wrapped in g. The member 54h embedded in the molding material 54g is a terminal connected to the electrode 54d, and the member 54k is a lead wire.

Here, at the time of molding, the centering member is provided with the upper and lower pressure receiving plates 54a, 54b in order to perform the centering operation of the upper and lower pressure receiving plates 54a, 54b.
b, the upper and lower pressure receiving plates 54a, 54b contact the centering member.
Depressions 54m and 54n are formed on the upper and lower surfaces of the sealing material 54e filling the central hole b.

Further, the upper pressure receiving plate 54a is brought into contact with the projection 72 of the yoke 52a so that the load sensor 5
After disposing 4, the gel silicone resin 78 is poured into the device case 43.

The lower pressure receiving plate 54 of the load sensor 54
When the lid member 57 is disposed by abutting the projection 76 on the bottom cover b, and the outer periphery locking portion 60 is swaged and fixed by forming the lower end swaging portion 43c of the device case 43 shown by the solid line in FIG.
The cover member 57 is integrated with the device case 43 while the load sensor 8 presses the load sensor 54 toward the yoke 52a and applies a predetermined preload. At this time, the above-mentioned gel-like silicon resin 78 is in a state of being densely filled in a space surrounded by the yoke 52 a containing the load sensor 54 and the lid member 57.

By the way, the cavity 32 of the support elastic body 32
Assuming that the space surrounded by the outer peripheral surface of the orifice component member 36 and the leaf spring 48 is a main fluid chamber 66, the main fluid chamber 66
A fluid such as oil is sealed in a communication path from the space through the opening 36d to the space where the diaphragm 42 is bulged.

The internal space near the diaphragm 42 is defined as a sub-fluid chamber 67, and the sub-fluid chamber 67 and the main fluid chamber 6
An orifice 68 is used as a communication passage between the six fluid passages 6, and when the volume of the main fluid chamber 66 fluctuates, fluid resonance occurs due to the auxiliary fluid chamber 67 and the orifice 68.

Here, the characteristics of the fluid resonance system determined by the mass of the fluid in the orifice 68 and the shape of the flow path in the expansion direction of the support elastic body 32 are such that the engine shake during running occurs, that is, 5 to 15 Hz. It is adjusted so as to exhibit a high dynamic spring constant and a high damping force when the engine mount 20 is vibrated.

The exciting coil 52b of the electromagnetic actuator 52 is connected to the controller 74 via a harness. As shown in the block diagram of FIG.
, A predetermined electromagnetic force is generated.

The controller 74 includes a microcomputer, necessary interface circuits, an A / D converter, and a D / A
It is configured to include a converter, an amplifier and the like, and is a vibration in a frequency band in which fluid cannot move between the main fluid chamber 66 and the sub-fluid chamber 67 through the orifice 68, that is, a vibration higher in frequency than the engine shake described above. When the idle vibration, the muffled sound vibration, and the vibration at the time of acceleration are input, the control vibration having the same cycle as the vibration is generated in the engine mount 20 and the transmission force of the vibration to the member 28 becomes “0”. As described above (more specifically, the drive signal y is changed so that the exciting force input to the engine mount 20 by the vibration of the engine 22 is offset by the control force obtained by the electromagnetic force of the electromagnetic actuator 52). Generated excitation coil 52b
To be supplied.

Here, idle vibration and muffled sound vibration are as follows.
For example, in the case of a reciprocating four-cylinder engine,
The main cause is that the engine vibration of the next component is transmitted to the member 28 via the engine mount 20. Therefore, if the drive signal y is generated and output in synchronization with the secondary component of the engine rotation, the vibration transmission rate Can be reduced. Therefore,
In the present embodiment, the rotation is synchronized with the rotation of the crankshaft of the engine 22 (for example, in the case of a reciprocating four-cylinder engine,
A pulse signal generator 76 is provided for generating an impulse signal (each time the crankshaft rotates 180 degrees) and outputting the impulse signal as a reference signal x.
Is supplied to the controller 74 as a signal indicating the state of occurrence of the vibration at.

The load sensor 54 detects the vibration state of the member 28 in the form of a load and outputs it as a residual vibration signal e. The residual vibration signal e is supplied to the controller 74 as a signal representing vibration after interference. Have been.
Then, based on the reference signal x and the residual vibration signal e, the controller 74 generates and outputs a drive signal y in accordance with a Filtered-X LMS algorithm, which is one of the successively updated adaptive algorithms.

Next, the engine mount 20 of the present embodiment will be described.
The operation of the anti-vibration mechanism will be described. When the engine 22 is started and vibration is input to the engine mount 20, the controller 74 executes a predetermined calculation process, outputs a drive signal y to the electromagnetic actuator 52, and reduces the vibration to the engine mount 20. Generates active control power to gain.

That is, the filter coefficient of the adaptive digital filter W is supplied from the controller 74 to the electromagnetic actuator 52 of the engine mount 22 at a predetermined sampling clock interval after the reference signal x and the residual vibration signal e are inputted. Are sequentially supplied as the drive signal y. As a result, a magnetic force corresponding to the drive signal y is generated in the exciting coil 52b. However, since the magnetic path member 46 has already been given a constant magnetic force by the permanent magnet 52c, the magnetic force by the exciting coil 52b is It can be considered that it acts to increase or decrease the magnetic force of 52c. That is, in a state where the drive signal y is not supplied to the exciting coil 52b, the magnetic path member 46 is displaced to a neutral position where the elastic supporting force of the leaf spring 48 and the magnetic force of the permanent magnet 52c are balanced. . 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 opposite to the magnetic force of the permanent magnet 52c, the magnetic path member 4
6 is displaced in a direction in which the clearance with the electromagnetic actuator 52 increases. Conversely, if the magnetic force generated in the exciting coil 52b is in the same direction as the magnetic force of the permanent magnet 52c, the magnetic path member 46 is displaced in a direction in which the clearance with the electromagnetic actuator 52 decreases.

As described above, the leaf spring 48 can be displaced up and down by the magnetic force generated by the electromagnetic actuator 52. When the leaf spring 48 is displaced up and down, the main fluid chamber 66 is displaced.
Of the supporting elastic body 32 due to the change in volume.
Expansion spring (considering a dynamic model, the supporting elastic body 32
Are interposed in parallel. ) Is deformed, an active supporting force is generated on the engine mount 20 in both forward and reverse directions. Then, each filter coefficient W of the adaptive digital filter W that becomes the drive signal y
Since ₁ is sequentially updated according to the synchronous Filtered-X LMS algorithm, after converged to each filter coefficient W _i is the optimum value of the adaptive digital filter W has passed a certain time, the drive signal y is an engine mount 2
By being supplied to 0, idle vibration and muffled sound vibration transmitted from the engine 22 to the member 28 via the engine mount 20 are reduced.

Next, the operation and effect of the load sensor 54 incorporated between the yoke 52a and the lid member 57 will be described. According to the present device 20, the space surrounded by the yoke 52a and the lid member 57 is densely filled with the gel-like silicone resin 78. The gel-like silicone resin 78 has heat resistance,
It is a material that is extremely excellent in cold resistance and water resistance. Therefore, the gel-like silicon resin 78 reliably blocks moisture from entering the load sensor 54 from the outside of the apparatus, and the molding material 54g made of the PBT resin is used even when the apparatus 20 is repeatedly operated at high and low temperatures. Is not likely to be degraded by hydrolysis. Therefore, the load sensor 54 can always accurately detect the residual vibration, and can maintain good sensing performance for a long period of time.

Here, the upper recess 54m and the lower recess 4n are formed in the center holes of the upper and lower pressure receiving plates 54a and 54b of the load sensor 54 as described above.
Entire region of the fourth upper pressure receiving plate 54a abuts against the yoke bottom surface 52a _1, when the entire area of the lower pressure receiving plate 54b is brought into contact with the bottom cover 58, upper recess 54m, is lower recesses 54n is closed by an air pocket liable to occur. When this air pocket occurs,
Silicon resin 78 deteriorates due to thermal expansion and contraction of air,
The liquid-tight seal structure may be deteriorated.

The upper pressure receiving plate 54a and the yoke lower surface 52
or silicone resin 78 is interposed as a layer between a _1, or when the silicone resin 78 is interposed between the lower pressure plate 54b and the bottom cover 58, the silicone resin 78 sag or solidification such The deterioration adversely affects the detection of the load sensor 6 due to the deterioration. Therefore, the contact portion between the upper pressure plate 54a and the yoke bottom surface 52a _1, the contact portion between the lower pressure plate 54b and the bottom cover 58, wants to prevent the silicone resin 78 is interposed.

Therefore, in the present embodiment, as shown in FIG. 7, the upper pressure receiving plate 54a of the load sensor 54 is
2a ₁ to the annular projection 72 formed in contact with the upper portion of the recess upper part is an air pocket liable 54m, annular projection 7
2 and a plurality of notch grooves 72a provided in the annular projection 72 form a resin passage communicating the raised resin storage space 72b and the outside of the space. This ensures that the silicon resin 78 that has passed through the resin passage (notch groove 72a) flows into the resin pool space 72b including the upper recess 54m.

The lower pressure receiving plate 54b of the load sensor 54
Abuts on an annular projection 76 formed on the bottom lid 58 of the lid member 57, a resin pool space 76b surrounded by the annular projection 76 below the lower recess 54n where air is likely to accumulate.
And a plurality of notch grooves 76 a provided in the annular projection 76.
Form a resin passage communicating between the resin accumulation space 76b and the outside of the space. Thus, the silicon resin 78 that has passed through the resin passage (notched groove 76a) reliably flows into the resin pool space 76b including the lower recess 54n.

[0059] Thus, as between the yoke bottom surface 52 ₁ and the upper pressure receiving plate 54a, so that air pockets hardly generated is poured gel-like silicone resin 78 is securely between the bottom cover 58 and a lower pressure receiving plate 54b, The deterioration of the liquid-tight sealing structure of the silicon resin 78 due to the thermal expansion and contraction of the air can be prevented.

[0060] In addition, the annular projection yoke bottom surface 52a ₁ 7
2 and the annular projection 76 of the bottom cover 58
The upper and lower pressure receiving plates 54 of the load sensor 54
Since the load sensors 54 a and 54 b are in contact with each other, the load sensor 54 can always accurately detect residual vibration.

Next, FIG. 8 and FIG.
4. Shape of yoke 52a and lid member 5 shown in FIGS.
7 shows another embodiment of the structure of FIG. The same components as those in FIGS. 3, 4, and 7 of this embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[0062] As shown in FIG. 8, the yoke bottom surface 52a _1, a plurality of radially extending from the axis P ₁ position long groove 8
0 is formed. And the outer peripheral edge 80 of each long groove 80
“a” extends from the outer periphery of the upper pressure receiving plate 54a of the load sensor 54 to the outside.

[0063] Further, as shown in FIG. 9, also the inner surface 58a of the lid member 57, a plurality of long grooves 82 so as to extend radially from the axis P ₁ is formed. And each long groove 82
The outer peripheral edge 82a of the
n to the outside of the outer periphery of n.

According to the above structure, as shown in FIG.
The upper pressure receiving plate 54a of the load sensor 54 is
_When it comes into contact with the position where _one long groove 80 is formed, the outer peripheral edge 8
When the silicon resin 78 that has passed through the long groove 80 from the side 0a reliably flows into the upper dent 54m side, and the lower pressure receiving plate 54b of the load sensor 54 contacts the position where the long groove 82 is formed in the bottom cover 58, the outer peripheral edge 82a The silicon resin 78 that has passed through the long groove 82 from the side surely flows into the lower recess 54n side. Accordingly, the flow of the gel-like silicon resin 76 into the yoke 52a and the lid member 57 that is in contact with the load sensor 54 is improved, so that almost no air pockets are generated, and the silicon resin accompanying the thermal expansion and contraction of the air is reduced. Deterioration of the liquid-tight seal structure of No. 78 can be prevented.

[0065] Also, the position of forming the long groove 80 of the yoke bottom surface 52a _1, at a position to form a long groove 82 of the bottom cover 58,
Since the upper and lower pressure receiving plates 54a and 54b of the load sensor 54 abut without the silicon resin 78 interposed therebetween, the load sensor 54 can always accurately detect residual vibration.

FIGS. 3, 4 and 7 show other functions and effects.
This is the same as the embodiment shown in FIG. 8 and FIG.
9, the yoke lower surface 52a₁And and lid
Although a long groove 80 is formed in the member 57,
Lower surface 52a₁Axis P of ₁A compound that extends radially from the position
Several ridges are formed, and the axis P of the inner surface 58a of the lid member 57 is formed.
₁Structure formed with a plurality of ridges extending radially from
May be.

[0067] According to this embodiment, the upper pressure receiving plate 54a of the load sensor 54 is in contact with the plurality of projections of the yoke bottom surface 52a _1, the lower pressure receiving plate 54b is bottom lid 5 of the load sensor 54
8, the gel-like silicon resin 78 surely flows into the upper dent 54m and the lower dent 54n through the gap between the ridges, so that almost no air pockets are generated, and the heat of the air is reduced. The deterioration of the liquid-tight seal structure of the silicone resin 78 due to expansion and contraction can be prevented beforehand.

[0068] Also, the position of forming the protrusion of the yoke bottom surface 52a _1, a position of forming the protrusion of the bottom lid 58, the upper portion of the load sensor 54 without intervening silicone resin 78 and the lower pressure receiving plate 54a, 54b Contact, the load sensor 54 can always detect the residual vibration accurately.

In the above embodiment, the case where the present invention is applied to the engine mount 20 that supports the engine 22 is shown. However, the application object of the anti-vibration support device according to the present invention is not limited to the engine mount 20. For example, it may be an anti-vibration support device of a machine tool accompanied by vibration.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an arrangement state of an anti-vibration support device according to the present invention.

FIG. 2 is a view showing a cross section along the axial direction of the vibration isolating support device of the present invention.

FIG. 3 is a diagram showing a lower surface shape of a yoke abutting on a load sensor according to the present invention.

FIG. 4 is a diagram showing a top surface shape of a lid member abutting on a load sensor according to the present invention.

FIG. 5 is a plan view showing a load sensor according to the present invention.

FIG. 6 is a cross-sectional view of the internal structure of the load sensor of FIG.

FIG. 7 is a diagram showing a state in which the load sensor is sandwiched between a yoke and a lid member and is incorporated in the device.

FIG. 8 is a diagram illustrating a lower surface shape of a yoke that abuts a load sensor according to another embodiment.

FIG. 9 is a diagram illustrating a top surface shape of a lid member that contacts a load sensor according to another embodiment.

FIG. 10 is a diagram showing a state in which a load sensor is built in the device using the yoke and the lid member shown in FIGS. 8 and 9.

FIG. 11 is a diagram showing the structure of a conventional vibration-proof support device.

[Explanation of symbols]

 Reference Signs List 20 engine mount (vibration isolation support device) 22 engine (vibration member) 28 member (support member) 32 support elastic member 43 device case 44 seal ring (support member) 46 magnetic path member (movable member) 48 leaf spring (movable member) 52 electromagnetic actuator (actuator) 52a yoke 54 load sensor 54a upper pressure receiving plate 54b lower pressure receiving plate 57 lid member 58 bottom lid (lid body) 72, 76 annular projection 72a, 76a notch groove 80, 82 long groove

Claims (5)

[Claims] 1. A supporting elastic body interposed between a vibrating body and a supporting body, a fluid chamber defined by the supporting elastic body, a fluid sealed in the fluid chamber, and a part of a partition of the fluid chamber. , A magnetizable movable member, an electromagnetic actuator for displacing the movable member, a load sensor for detecting residual vibration on the support side, and a control signal for the electromagnetic actuator in accordance with a detection result of the load sensor. And a controller that outputs the output, a device case is interposed between the support elastic body and the support, the electromagnetic actuator is disposed in the device case, and the load sensor is provided with a yoke of the electromagnetic actuator. In a vibration-isolation support device that is disposed sandwiched between the cover member and an outer peripheral locking portion of the cover member fixed to an opening end of the device case, Surrounded by the said yoke and said lid member are crowded viewed space, vibration-damping support device is characterized in that filling the gel-like silicone resin. 2. A contact portion between the load sensor and the yoke and a contact portion between the load sensor and the lid member communicate with a space filled with the gel-like silicone resin, and the contact portion is formed in the contact portion. 2. The anti-vibration support device according to claim 1, wherein a resin passage is provided for preventing the stagnation of the gel silicon resin. 3. An annular projection is formed on one of the abutting surfaces of the abutting portion in the resin passage, and the other abutting surface abuts on the tip of the annular abutment, and The anti-vibration support device according to claim 2, wherein a cutout groove is formed in a part of the protrusion to communicate the inside and outside of the protrusion. 4. A plurality of grooves extending radially from the center of the contact surface in one contact surface of the contact portion so that the resin passage overlaps the plurality of grooves. 3. The anti-vibration support device according to claim 2, wherein the other abutment surface is configured to abut. 5. A plurality of ridges extending radially from a central portion of one of the abutting surfaces of the resin passage, and the other of the plurality of ridges is formed in the plurality of ridges. 3. An anti-vibration support device according to claim 2, wherein a contact surface of said anti-vibration member is configured to abut.