JP2007218418A - Active liquid-sealed vibration control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an active liquid-sealed vibration control device excellent in fixing workability of a movable element of an actuator and a vibration plate and to solve the problem that movement of the movable element is inhibited. <P>SOLUTION: The active liquid-sealed vibration control device comprises a first mounting tool 10, a second mounting tool 12, a vibration control base body 14 composed of a rubber elastic body connecting the mounting tools 10, 12, a first liquid chamber 16 having the vibration control base body 14 as a part of a chamber wall, a vibration plate 24 as another part of the chamber wall of the first liquid chamber 16, and the actuator 26 for driving the vibration of the vibration plate 24. The actuator 26 consists of a stator 54 fixed to the side of the second mounting tool 12, and the movable element 56 reciprocatingly supported with respect to the stator 54 and connected to the vibration plate 24 for driving the vibration thereof. A tip end 56a of the movable element 56 is adsorbed and fixed to the vibration plate 24 by a magnet 74. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an active liquid-filled vibration isolator of the type that enhances the vibration isolating effect by controlling the pressure of an internal liquid chamber.

  An active liquid-filled vibration isolator generally includes a first fixture, a second fixture, a vibration isolating base made of a rubber-like elastic body connecting them, and the anti-vibration base covering a part of a chamber wall. A first liquid chamber formed; a second liquid chamber formed by a diaphragm having a part of a chamber wall made of a rubber film; an orifice passage communicating the first liquid chamber and the second liquid chamber; and a chamber of the first liquid chamber A vibration plate that forms another part of the wall and an actuator that controls the pressure of the first liquid chamber by driving the vibration plate (see, for example, Patent Document 4 below). .

  And, for example, it is assembled as an engine mount in an automobile, and by controlling the pressure of the first liquid chamber via an actuator, vibrations are counterbalanced and spring characteristics are actively changed according to input vibrations Thus, an excellent vibration suppressing effect is obtained by, for example, reducing the mount spring.

Conventionally, in the above active liquid-filled vibration isolator, as disclosed in Patent Document 1 below, the actuator mover is connected and fixed to the vibration plate at the center of the vibration plate. A configuration is adopted in which a female screw portion is provided, and a mover is coaxially disposed in the axial direction with respect to the female screw portion, and then both are fastened and fixed by a fixing bolt inserted through the mover. Alternatively, as disclosed in Patent Document 2 below, a cylindrical portion is projected from the center portion of the vibration plate toward the actuator, and the shaft portion of the mover is inserted into the cylindrical portion and caulked. Thus, a configuration in which the mover and the vibration plate are connected and fixed is employed. Furthermore, as disclosed in Patent Document 3 below, there is a configuration in which the upper end portion of the mover and the central portion of the vibration plate are fixed by uneven fitting or screw fastening.
JP 2001-304329 A JP 2002-195342 A JP 2005-155899 A JP 2004-293605 A

  In the conventional configuration in which the mover and the vibration plate are fixed by bolts or caulking, there is a problem that workability at the time of manufacturing the vibration isolator is inferior. In other words, this type of active liquid-filled vibration isolator has a vibration isolator body and an actuator formed separately, and when the two are assembled, the actuator mover is vibrated by the vibration isolator body. At this time, in the above-described conventional configuration, the fixing operation of both is troublesome, and strict centering between the mover and the vibration plate is also necessary.

  Further, the vibration plate is usually incorporated in the vibration isolator main body through a support rubber integrally provided on the outer peripheral portion, but the shaft core is displaced due to shrinkage after vulcanization molding of the support rubber. There is. If the axis is shifted in this way, not only the fixing operation with the mover becomes difficult, but also the movement of the mover is hindered when the actuator operates.

  The present invention has been made in view of the above, and is an active liquid that is excellent in the workability of fixing the movable element of the actuator and the vibration plate and can solve the problem that the movement of the movable element is hindered. An object of the present invention is to provide an enclosed vibration isolator.

  An active liquid-filled vibration isolator according to the present invention includes a first fixture, a second fixture, and a vibration isolating base made of a rubber-like elastic body that connects the first fixture and the second fixture, A first liquid chamber in which the vibration isolating substrate forms a part of a chamber wall; a vibration plate that forms another part of the chamber wall of the first liquid chamber; and the first liquid chamber sandwiching the vibration plate. An active liquid-filled vibration isolator comprising an actuator that is disposed on the opposite side of the vibration plate to drive the vibration plate, wherein the actuator is fixed to the second fixture side, A movable element that is supported so as to be reciprocally movable with respect to the stator and that is coupled to the vibration plate and drives the vibration plate to vibrate, the tip of the movable element being the vibration plate On the other hand, it is attracted and fixed by a magnet provided on at least one of the movable element and the vibration plate.

  By connecting and fixing the actuator mover and the vibration plate using magnets in this way, strict centering between the mover and the vibration plate can be achieved when the actuator is assembled to the vibration isolator body. It is unnecessary and can be easily combined. In addition, even if the shaft core is displaced due to variations during molding of the vibration plate, this displacement can be absorbed by the coupling by the magnet, so that the displaced shaft cores can be moved by forcibly fixing them. The problem that the movement of the child is hindered can also be solved.

  In the configuration of the present invention, the second fixture has a cylindrical shape, and the vibration-proof base is fixed to one side in the axial direction of the second fixture, and in the axial direction of the second fixture. The vibration plate is disposed to face the vibration isolation base, and the vibration plate includes a coupling portion for the mover at a central portion and a vibration supporting rubber at an outer peripheral portion. The mover is provided so as to be reciprocally movable in the axial direction of the second fixture, and the tip portion is coupled to the connecting portion so that the vibration is applied. It is preferable that the plate is configured to vibrate in the axial direction of the second fixture.

  In addition, a diaphragm made of a rubber film that covers the vibration isolating base on the outer peripheral side of the vibration isolating base is provided across the first mounting tool and the second mounting tool, and between the diaphragm and the outer peripheral surface of the vibration isolating base. The second liquid chamber may be provided in the first liquid chamber, and the second liquid chamber may be communicated with the first liquid chamber by an orifice passage. By providing the second liquid chamber on the outer peripheral side of the vibration isolating base in this manner, it is only necessary to connect the vibration plate to the mover, and the number of parts around the vibration plate and the mover can be reduced. .

  In the configuration of the present invention, the mover includes a shaft member connected to the vibration plate, and a magnetic material portion attached to an outer peripheral surface of the shaft member, and the stator includes the magnetic material portion. And a magnetic pole portion projecting radially inward, and the magnetic pole portion is provided with at least a pair of permanent magnets adjacent to each other in the axial direction and having different polarities, A coil is wound around the magnetic pole part, and the movable element is reciprocated in the axial direction by a combination of a magnetomotive force generated by excitation of the coil and a magnetomotive force of each permanent magnet. Preferably, it is configured. By using such a double-amplitude drive type actuator, it is possible to eliminate the delay in the rise of the force generated by the reciprocating motion of the mover, and to enable quick and smooth drive control of the mover. Moreover, since the iron core is movable, a large output can be obtained without increasing the outer diameter.

  In the active liquid-filled vibration isolator according to the present invention, when a plurality of pairs of the permanent magnets are arranged in the axial direction, an output for driving the mover can be increased. Also, even if the assembly position variation in the axial direction occurs in the mover due to variations in the formation of the vibration plate, etc., by providing the permanent magnet in multiple stages in the axial direction, the magnetic material portion and the permanent magnet can overlap. It is possible to avoid such a problem that the mover does not operate.

  The active liquid-filled vibration isolator according to the present invention is suitably used as an engine mount in which the first fixture is attached to the engine side and the second fixture is attached to the vehicle body side. The engine vibration that the engine mount attempts to isolate is not a simple sine wave vibration caused only by an explosion for each cylinder, but a vibration that is a combination of order components caused by various phenomena such as piston vertical vibration. In addition, the vibration is such that the composition ratio of each order component changes according to the engine speed. More specifically, vibration noise generated by an engine has a phenomenon that varies depending on the generated frequency range. Broadly speaking, a relatively low-frequency rigid body vibration region in which a power plant that combines an engine and a transmission can be considered as a rigid body. And an elastic vibration region in a high frequency region. Sources of engine vibration can be classified into reciprocal inertial force and inertial couple due to reciprocating motion of engine pistons and connecting rods, and torque fluctuations due to combustion pressure and inertial force in the cylinder. These vibration forces generate integer order component vibrations that are vibrations dependent on engine rotation. In addition, the bending resonance of the power plant, the valve train inertia force, and the bending resonance of the engine crankshaft are excited with different amplitudes for each cylinder, and the torque fluctuation for each cylinder excites the torsional vibration of the cylinder block. As a cause, vibration of a half-order component (rotation 1.5 order or 2.5 order component) occurs. In this way, vibrations of integer order and half order components of engine rotation occur, but actual engine vibration includes a composite vibration of a plurality of order components, and the composition ratio of such order vibration components is It changes with the change of engine speed. Therefore, to cancel the actual engine vibration, drive control of the vibration plate corresponding to the engine speed is required. Therefore, in the present invention, a control unit is provided for exciting the vibration plate so as to cancel vibration transmitted from the engine, and the control unit converts the sine wave of each order component of engine rotation to engine rotation. It is preferable that the vibration plate is configured to reduce vibration from the engine by driving the vibration plate based on a vibration waveform synthesized according to a ratio determined according to the number.

  In this way, according to changes in the engine speed, vibrations that take into account the component ratio of each order component are applied to the vibration plate in an opposite phase to the engine vibrations, thereby effectively canceling the engine vibrations. be able to. In particular, according to the present invention, since the tip of the mover is fixed to the vibration plate by the magnet as described above, the shift of the shaft core is absorbed to ensure smooth movement of the mover. Therefore, it is possible to suppress the deviation of control and to exhibit more excellent anti-vibration performance. In addition, since the actuator can be driven with a sinusoidal waveform with the dual amplitude drive type actuator, the drive control according to the excitation waveform obtained by synthesizing the sinusoidal wave must be performed. Can do.

  In the active liquid-filled vibration isolator according to the present invention, the second fixture includes a second fixture main body coupled to the vibration isolator base, and a bottomed cylindrical holding member that accommodates and holds the actuator. The movable element is provided so as to be capable of reciprocating in the axial direction within the holding member, and a through hole is provided in the bottom plate portion of the holding member on the axis of the movable element, and the bottom plate portion An auxiliary member having a through-hole coaxial with the through-hole is fixed on the upper surface, and both the through-holes are closed with a plug member made of a rubber-like elastic body. By providing a pair of circumferential grooves and press-fitting into the through holes of the bottom plate portion from below, the peripheral portions of the through holes of the bottom plate portion and the auxiliary member are fitted into the upper and lower circumferential grooves. The both through holes may be closed. With this configuration, water and foreign matter can be prevented from entering the holding member from the bottom of the holding member, preventing damage to the mover and the coil and ensuring smooth movement of the mover. be able to.

  In the active liquid-filled vibration isolator according to the present invention, an annular metal fitting is provided on the outer peripheral edge of the vulcanized support rubber, and the vibration plate is fixed to the second fixture via the annular metal fitting. The second fixture comprises a cylindrical second fixture body coupled to the vibration isolation base, and a cylindrical holding member that houses and holds the actuator, and the second fixture body The vibration-proof base is fixed to one side in the axial direction of the second mounting body, and a caulking tube portion is provided in the opening on the other side in the axial direction of the second fixture body via a first flange. A second flange is provided at the portion, and a cylindrical press-fit portion extends in an axial direction from the outer peripheral edge of the annular fitting toward the holding member, and the cylindrical press-fit portion is press-fitted into the caulking tube portion. The first furan is secured by caulking and fixing by the caulking tube portion. The annular fitting between said second flange and may be clamped fixed.

  When configured in this way, in the caulking fixing portion of the vibration plate with respect to the second fixture body, the cylindrical press-fitting portion of the annular fitting provided on the outer periphery of the vibration plate is connected to the caulking tube portion of the second fixture body. By press-fitting, misalignment during mounting of the vibration plate and the second fixture body, that is, positional deviation in the radial direction (perpendicular to the axis) between the vibration plate and the second fixture body during fixation is suppressed. Is done.

  Further, in this case, the annular metal fitting extends in the axial direction toward the inside of the holding member, and extends radially outward from the tip of the cylindrical portion to It is preferable to include a positioning extension portion that positions the annular metal fitting in the radial direction with respect to the inner peripheral surface. By providing the positioning extension portion, misalignment between the vibration plate and the holding member is also suppressed.

  As described above, according to the present invention, by connecting and fixing the mover of the actuator and the vibration plate using a magnet, when the actuator is assembled to the vibration isolator body, the mover and the vibration plate Excellent fixed workability. Moreover, since the displacement by the shaft center of the vibration plate can be absorbed by the coupling by the magnet, the problem that the movement of the mover is hindered after the assembly can be solved.

  Next, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 shows an active liquid-filled vibration damping device assembled as an automobile engine mount according to a first embodiment of the present invention.

  This liquid-filled vibration isolator has a first fitting 10 attached to the engine side, a cylindrical second fitting 12 attached to a frame on the vehicle body side, and a rubber-like elastic coupling the both attachments 10 and 12. An anti-vibration base 14 made of a body, a first liquid chamber 16 in which the anti-vibration base 14 forms a part of a chamber wall, and a second liquid chamber 20 formed of a diaphragm 18 having a part of the chamber wall made of a rubber film. An orifice passage 22 that allows the first liquid chamber 16 and the second liquid chamber 20 to communicate with each other, a vibration plate 24 that forms another part of the chamber wall of the first liquid chamber 16, and the vibration plate 24 And an actuator 26 that is driven to control the pressure of the first liquid chamber 16.

  The first fixture 10 has a flange portion 10a that projects outward in the radial direction, and has a generally coma shape as a whole, and the upper side of the second fixture 12 on the axis L of the second fixture 12. Are spaced apart from each other. The first fixture 10 has a screw hole 10b that opens upward in the axial center thereof, and a bolt (not shown) is screwed into the screw hole 10b so as to be connected to the bracket 1 on the engine side. It has become.

  The second fixture 12 includes a cylindrical first tube fitting 28 in which the vibration-proof base 14 is vulcanized and bonded to the inner peripheral portion, an annular fitting 30 in which the vibration plate 24 is vulcanized and bonded to the inner peripheral portion, A cylindrical second mounting body 33 comprising a cylindrical second cylindrical metal fitting 32 to which the lower end portion of the diaphragm 18 is vulcanized and bonded, and a bottomed cylindrical metal holding member 34 for accommodating and holding the actuator 26. It consists of. Then, the flange 28a projecting from the lower end portion of the first tubular fitting 28, the outer peripheral edge portion of the annular fitting 30, and the flange 34a projecting from the upper end portion of the holding member 34 are overlapped in this order from above, The flange 32a is bent and fixed by caulking and fixed so as to be wrapped with a flange 32a protruding from the lower end of the two-tube fitting 32. The holding member 34 includes an upper metal fitting 36 having the flange 34a and a lower metal fitting 40 to which a support bracket 38 is fixed, and both of them are obtained by fitting the upper end portion of the lower metal fitting 40 to the upper metal fitting 36. It is integrated. A plurality of connection bolts 42 that are connected to the frame on the vehicle body side are press-fitted and fixed to the support bracket 38.

  The anti-vibration base 14 has a substantially umbrella shape, and is vulcanized and bonded so that the lower surface side of the first fixture 10 is embedded in the upper end portion thereof. In addition, the vibration isolating base 14 is fixed to the upper side of the second fixture 12, and specifically, the first cylindrical fitting in which the lower end outer peripheral portion of the vibration isolating base 14 is located at the upper end of the second fixture 12. The inner peripheral surface portion of 28 is vulcanized and bonded to the entire periphery.

  The vibration plate 24 has a disk shape and is disposed to face the vibration isolation base 14 in the axial direction Z of the second fixture 12. The vibration plate 24 is provided in a disc-shaped vibration member 44, an annular vibration support rubber 46 vulcanized and bonded to the outer periphery of the vibration member 44, and a central portion of the vibration member 44. It consists of a cylindrical connecting part 48. The outer periphery of the vibration supporting rubber 46 is vulcanized and bonded to the inner peripheral portion of the annular fitting 30, whereby the vibration plate 24 is attached to the second fixture 12 via the vibration supporting rubber 46. It is supported.

  The diaphragm 18 is provided over the first fixture 10 and the second fixture 12 so as to cover the vibration isolation substrate 14 on the outer peripheral side of the vibration isolation substrate 14. Specifically, the diaphragm 18 has an upper end portion vulcanized and bonded to the ring-shaped metal fitting 50, and a lower end portion vulcanized and bonded to the second cylindrical metal fitting 32. On the lower surface of the ring-shaped metal fitting 50, a sealing ridge 52 is provided over the entire circumference by rubber continuously extending from the diaphragm 18, and the iron ring-shaped metal fitting 50 is attached to the first fitting 10 made of aluminum. When externally fitting and attaching to the upper end portion by press fitting, the protrusion 52 is pressed against the upper surface of the flange portion 10a of the first fixture 10 so that the gap between the ring-shaped metal fitting 50 and the first fixture 10 is reduced. It is configured to seal.

  The first liquid chamber 16 is formed between the lower surface of the vibration isolation base 14 and the upper surface of the vibration plate 24 inside the second fixture 12. The second liquid chamber 20 is formed between the outer peripheral surface of the vibration isolating base 14 and the diaphragm 18. An orifice passage 22 for communicating the first liquid chamber 16 and the second liquid chamber 20 is provided along the circumferential direction of the second fixture 12. More specifically, the lower portion of the first tubular fitting 28 is bent and formed radially inward, so that a groove portion serving as the orifice passage 22 between the second tubular fitting 32 and the outer circumferential side thereof is surrounded. It extends in the direction. The orifice passage 22 has one end in the circumferential direction connected to the first liquid chamber 16 through the first opening 22a, and the other end in the circumferential direction connected to the second liquid chamber 20 through the second opening 22b. ing.

  The actuator 26 is an iron magnet movable type electromagnet type linear actuator, and is disposed on the opposite side of the first liquid chamber 16 with the vibration plate 24 interposed therebetween. The actuator 26 is supported by a stator 54 fixed to the second fixture 12, and is supported so as to reciprocate in the axial direction Z with respect to the stator 54, and is coupled to the vibration plate 24 to drive it. The movable element 56 is provided.

  The mover 56 is arranged in a vertical posture along the axis L of the second fixture 12 (coaxially in the example in the figure), and the tip (upper end) 56 a is connected to the connecting portion 48 of the vibration plate 24. A shaft member 58 and a magnetic material portion 60 as a mover core formed by laminating a number of metal plates made of magnetic metal such as an electromagnetic steel plate. The magnetic material portion 60 is intermediate in the axial direction of the shaft member 58. It is fixed to the outer peripheral surface in the part.

  The stator 54 has an annular shape that surrounds the outer periphery of the mover 56, and supports the mover 56 so that it can reciprocate in the axial direction Z of the second fixture 12 in its hollow portion. Specifically, the stator 54 includes a yoke 62 formed by laminating a plurality of annular (here, square annular) metal plates made of a magnetic metal such as an electromagnetic steel plate, and a magnetic material portion 60 at the center of the yoke 62. Magnetic pole portions 64, 64 projecting inward in the radial direction X from both sides are provided so as to be opposed to each other.

  The mover 56 is supported so as to be able to reciprocate in the vertical direction with respect to the stator 54 via leaf springs 66 and 66 which are a pair of upper and lower elastic support members. The leaf spring 66 is formed in the shape of a rectangular deformed ring that is constricted inward so as to bypass a coil portion described later, and is located above and below the magnetic material portion 60 with a gap. The leaf spring 66 is fixed to the mover 56 by tightening with nuts 65 and 65 in the state of being axially positioned by the upper and lower step portions 58a and 58a of the shaft member 58. On the other hand, with respect to the stator 54, the upper and lower leaf springs 66, 66 are fixed to fastening portions by bolts 67, 67 fastened with the yoke 62 interposed therebetween, and are positioned in the axial direction by a plurality of spacers 69. The state is fixed. The stator 54 is fixed to the bottom surface of the lower metal fitting 40 of the holding member 34 by the bolts 67.

  As shown in FIGS. 4 to 6, the tips or inner ends of the magnetic pole portions 64 and 64 of the stator 54 facing the magnetic member 60 are arranged adjacent to each other in the reciprocating direction (vertical direction) of the mover 56. The permanent magnets 68 and 70 having a pair of upper and lower circular arc plates facing the mover 56 are arranged in a direction (left-right direction) perpendicular to the reciprocating direction so that their magnetic poles are NS alternately different from each other. The magnetic poles are arranged side by side, and the arrangement of the magnetic poles (N pole and S pole) is reversed. Note that the length from the upper end of the upper permanent magnet 68 to the lower end of the lower permanent magnet 70 is longer than the length of the magnetic material portion 60 in the vertical direction (axial direction).

  The pair of magnetic pole portions 64 and 64 of the stator 54 are wound around the axes 72 in the direction perpendicular to the reciprocating direction (left and right direction in FIG. 4). 72 and 72 are wound so that magnetic flux passing through the pair of permanent magnets 68 and 70 can be generated.

  In the case of the figure, a pair of permanent magnets 68 and 70 are provided at the inner end portions of the two magnetic pole portions 64 and 64 of the stator 54 facing each other with the magnetic material portion 60 interposed therebetween. 64 permanent magnets 68 and 70 face each other across the mover 56 in a direction orthogonal to the reciprocating direction, and the arrangement of the magnetic poles is reversed left and right so that the opposing magnetic poles are different from each other. It is arranged. Correspondingly, the coil 72 is also wound around the magnetic pole portions 64 and 64 in a state where each of the coils 72 is located outward from each permanent magnet.

  As shown in FIG. 4, the pair of coils 72 are connected to each other. As shown in FIGS. 4 and 5, in this embodiment, the upper permanent magnet 68 of the pair of upper and lower permanent magnets 68, 70 has an N pole on the surface facing the magnetic material portion 60 and an S pole on the opposite surface. The lower permanent magnet 70 has a south pole on the surface facing the magnetic material portion 60 and a north pole on the opposite surface. Of the pair of left permanent magnets 68, 70, the upper permanent magnet 68 has an S pole on the surface facing the magnetic material portion 60 and an N pole on the opposite side, and the lower permanent magnet 70 has a magnetic material portion 60. The opposite side is the N pole and the opposite side is the S pole. 4 and 5, the white arrows pointing in the left-right direction indicate the direction of the magnetomotive force of the permanent magnets 68 and 70. The magnetomotive force is directed to the left side at the upper side and to the right side at the lower side.

  With the above configuration, when the coil 72 is not energized, the magnetic flux generated by the permanent magnets 68 and 70 in the left and right magnetic pole portions 64 and 64 is short-circuited through the portion of the magnetic material portion 60 that faces both the magnets. Then, as shown in FIG. 5, when a positive current flows through the coil 72, a magnetomotive force in the direction of the arrow is generated in the coil 72. As a result, the direction of the magnetomotive force of the upper permanent magnet 68 and the coil 72 The direction of the magnetomotive force (the arrow in FIG. 5) is the same, the magnetic fluxes of the magnets are combined to increase the magnetomotive force, while the direction of the magnetomotive force of the lower permanent magnet 70 and the magnetomotive force of the coil 72 are The direction is reversed, and the magnetomotive force of both is canceled and weakened. As a result, an upward force (indicated by a white arrow) acts on the magnetic material portion 60, and the mover 56 rises.

  Further, as shown in FIG. 6, when a current (negative current) in the reverse direction flows through the coil 72, the direction of the magnetomotive force of the upper permanent magnet 68 and the direction of the magnetomotive force of the coil 72 are reversed. Are reversed and the magnetomotive force is weakened, and the direction of the magnetomotive force of the lower permanent magnet 70 and the direction of the magnetomotive force of the coil 72 are the same. Combined to increase magnetomotive force. Thereby, a downward force (indicated by a white arrow) acts on the magnetic material portion 60, and the mover 56 is lowered. Then, when the direction of the current of the coil 72 is alternately changed in the forward and reverse directions, the mover 56 reciprocates up and down.

  The mover 56 and the vibration plate 24 of the actuator 26 having such a configuration are attracted and fixed via a magnet 74 made of a permanent magnet. Specifically, as shown in FIG. 1, a mover side connecting portion 76 is attached to an upper end portion of a shaft member 58 that is a tip end portion 56a of the mover 56 by, for example, screwing or the like. A magnet 74 is embedded in the upper surface (tip surface) of the connecting portion 76. On the other hand, the connecting portion 48 of the vibration plate 24 is made of a magnetic metal such as iron. Therefore, the tip 56 a of the mover 56 is fixed to the connecting portion 48 of the vibration plate 24 by the magnetic force of the magnet 74. For such fixing by the magnet 74, a magnet 74 having a magnetic force larger than the tensile force is used so that it does not come off when the mover 56 is pulled downward when the actuator 26 is operated. A permanent magnet made of steel is used.

  For example, as shown in FIG. 2, the magnet 74 is provided with a magnet 74 in the connecting portion 48 of the vibration plate 24 and the mover side connecting portion 76 is formed of a magnetic metal. You can also. Further, as shown in FIG. 3, magnets 74 and 74 that attract each other may be provided on both the movable element side connecting portion 76 and the connecting portion 48 of the vibration plate 24.

  In the liquid-filled vibration isolator of the present embodiment having the above configuration, the first fixture 10 and the second fixture 12 (however, excluding the lower metal fitting 40) are formed by vulcanization molding of the vibration isolator base 14. The vibration isolator body is formed by connecting them together and further enclosing the liquid in the first liquid chamber 16 and the second liquid chamber 20. Separately from this, the actuator 26 fixed to the lower metal fitting 40 is formed. When the lower metal fitting 40 is externally fitted to the upper metal fitting 36 of the vibration isolator main body and assembled together, the tip 56a of the movable element 56 of the actuator 26 and the vibration plate 24 are connected. At this time, according to the present embodiment, the mover 56 and the vibration plate 24 are attracted and fixed by the magnetic force of the magnet 74, so that strict alignment between the mover 56 and the vibration plate 24 is not necessary. Can be easily combined.

  Further, even if the shaft core of the vibration plate 24 is displaced due to shrinkage of the vibration support rubber 46 after the vulcanization molding of the vibration plate 24, the displacement is absorbed because of the coupling by the magnet 74. Therefore, smooth movement of the mover 56 can be ensured even when the axis is displaced due to variations in the formation of the vibration plate 24.

  Furthermore, in the case of fixing the vibration plate and the mover with a conventional bolt, it is necessary to insert the bolt into the mover using a pipe member. However, if the magnet 74 is connected, the pipe member is connected to the mover. There is no need to use it, and the outer diameter of the mover can be reduced correspondingly, leading to weight reduction.

  Further, according to the present embodiment, the movable element 56 can be driven in both the upper and lower directions by flowing a sinusoidal alternating current through the coil 72 using the actuator 26 of both amplitude drive type, and the vibration plate connected thereto 24 can be given a sinusoidal vibration, so that the pressure of the first liquid chamber 16 can be effectively controlled. Further, a combination of the direction of the magnetomotive force of each of the pair of permanent magnets 68 and 70 having different polarities and the magnetomotive force generated in the coil 72 can provide a large output while being a relatively compact device.

[Second Embodiment]
FIGS. 7 to 9 show an active liquid-filled vibration isolator assembled as an automobile engine mount according to a second embodiment of the present invention. This vibration isolator has the same basic configuration as that of the first embodiment, and hereinafter, common portions are denoted by the same reference numerals and different portions will be described.

  In the vibration isolator of the present embodiment, the lower metal fitting 40 in the holding member 34 of the second fixture 12 is constituted by a bottomed cylindrical cup-shaped member. The movable element 56 provided so as to be capable of reciprocating in the axial direction within the holding member 34 includes a pipe member 58b in which the shaft member 58 serves as a spacer that defines the distance between the upper and lower leaf springs 66, 66, and the pipe. The upper plate spring 66 is disposed in contact with the upper end of the pipe member 58b, and the upper side of the ring member 58d is fitted on the upper end of the bolt member 58c. A leaf spring 66 is sandwiched. Further, the lower plate spring 66 is disposed in contact with the lower end of the pipe member 58b, and the lower plate spring 66 is sandwiched between the ring member 58e fitted on the lower end of the bolt member 58c. The upper end portion of the bolt member 58 is screwed into the screw hole of the mover side connecting portion 76 including the magnet 74, whereby the mover 56 is configured and the upper and lower leaf springs 66, 66 are axially moved. It is fixed in a positioned state.

  Further, two pairs of permanent magnets 68 and 70 provided on the magnetic pole portion 64 of the stator 54 are provided side by side in the axial direction. Specifically, as shown in FIG. 7, the permanent magnets 68 and 70 that are paired up and down are perpendicular to the reciprocating direction (left and right direction) so that their magnetic poles are NS different from each other. Are arranged in such a manner that the arrangement of the magnetic poles (N pole and S pole) is reversed, and two sets of such upper and lower permanent magnets 68 and 70 are provided in the axial direction and Adjacent ones are arranged in a state where the arrangement of the magnetic poles is reversed. The two pairs of permanent magnets 68 and 70 are provided at the inner end portions of the two magnetic pole portions 64 and 64 of the stator 54 facing each other with the magnetic material portion 60 interposed therebetween. The permanent magnets 68 and 70 are opposed to each other with the mover 56 interposed therebetween in a direction orthogonal to the reciprocating direction, and the magnetic poles are arranged so that the opposite magnetic poles are opposite to each other so that the opposing magnetic poles are different from each other. It is installed. In addition, the length from the upper end to the lower end of the two pairs of permanent magnets 68 and 70 is set to the same dimension as the length of the magnetic material portion 60 in the vertical direction (axial direction).

  Thus, by providing the permanent magnets 68 and 70 in two stages in the axial direction, the stroke of the mover 56 is shortened compared with the case where it is provided in one stage shown in FIG. Can do. In the case of one stage, when the assembly variation in the axial direction occurs in the mover 56, the magnetic material portion 60 of the mover 56 is displaced from the arrangement range of the permanent magnets 68 or 70, and the drive of the mover 56 is impaired. However, by providing two stages in this way, even if it is displaced in the axial direction and deviated from the range in which one of the pair of permanent magnets 68 and 70 is disposed, another pair of permanent magnets may be used. A driving force can be exerted on the mover 56 by the magnets 68 and 70, and a problem that the mover does not operate can be avoided.

  In the vibration isolator of the present embodiment, both ends in the axial direction of the stator 54, that is, the upper surface 54a and the lower surface 54b are in contact with each other over the entire circumference, and the space 82 inside the corresponding contact portion 80 is fixed. Upper and lower sealing means 86 and 88 for sealing against the outer peripheral space 84 of the child 54 are provided. These sealing means 86 and 88 are provided on the holding member 34 of the second fixture 12.

  Specifically, the upper sealing means 86 that contacts the upper surface 54 a of the stator 54 includes an annular extending portion 90 that extends inward in the direction perpendicular to the axis from the lower end of the upper metal fitting 36, and the annular extending portion 90. The upper seal rubber 92 is provided at the tip (inner end) over the entire circumference and contacts the upper surface 54a of the stator 54. On the other hand, the lower sealing means 88 that comes into contact with the lower surface 54b of the stator 54 includes a cylindrical extending portion 94 that extends upward from the bottom surface of the lower metal fitting 40, and a tip of the cylindrical extending portion 94 ( The lower sealing rubber 96 is provided on the entire upper end) and is in contact with the lower surface 54b of the stator 54. In this embodiment, the cylindrical extending portion 94 is configured as a side wall of a dish-shaped auxiliary member 98 fixed to the upper surface of the bottom plate portion 40a of the lower metal fitting 40, and has a reverse tapered cylindrical shape that spreads upward. The front end is bent outwardly in a flange shape, and a lower seal rubber 96 is provided at the front end of the flange shape. In this example, the upper and lower seal rubbers 92 and 96 are vulcanized and bonded to the extended portions 90 and 94, respectively. However, separate seal rubbers 92 and 96 are attached to the extended portions 90 without being vulcanized and bonded. , 94 can also be attached.

  In consideration of the moldability of these sealing means 86 and 88, in this embodiment, the outer shape of the stator 54 is formed in a circular shape as shown in FIG. 10, and therefore, as shown in FIGS. In addition, the seal portion (contact portion 80) formed by the seal rubbers 92 and 96 is also configured to be circular. However, the stator 54 may have a rectangular annular shape, and the seal rubbers 92 and 96 may be brought into contact with each other along the outer shape thereof.

  By providing the sealing means 86 and 88 in this way, it is possible to prevent water and foreign matter from entering around the movable element 56. In particular, in the linear actuator 26, there is a minute gap between the magnetic material part 60 of the mover 56 and the magnetic pole part 64 of the stator 54, and if foreign matter enters the gap, it may cause malfunction. Although there is a possibility that the smooth movement of the mover 56 is hindered, such a problem can be solved by the seal structure. Further, since the outer peripheral space 84 is isolated in this way, the air space including the mover 56 is reduced by that amount, and therefore, by reducing the space for condensation against the condensation caused by the heat generation of the stator 54, etc. The amount of water generated around the mover 56 can be suppressed.

  In the vibration isolator of this embodiment, in order to prevent water and chemicals from entering the coils 72, the outer periphery of each coil 72 is covered with a covering 100 formed by molding a synthetic resin. That is, the coil 72 is wound around a resin bobbin 102 fitted around the magnetic pole part 64, and the outer periphery of the coil 72 and the resin bobbin 102 is covered with the synthetic resin covering 100 by molding of synthetic resin. Has been. As shown in FIG. 10, the pair of coils 72 and 72 formed into a resin mold in this way are integrally formed and electrically connected via the connecting portion 104 formed simultaneously by the above molding. ing. Thereby, the number of parts can be reduced and the assemblability can be improved. In addition, a connecting terminal portion 106 connected to the coil 72 is formed on the lower surface of the covering body 100 so as to protrude outward.

  Since the two coils 72 and 72 are integrally formed in this way, as shown in FIG. 10, the stator 54 is composed of two semicircular stator portions 108 and 108 divided in the circumferential direction. By combining them, a circular ring surrounding the outer periphery of the mover 56 is formed. When assembling the actuator 26, with the mover 56 disposed between the left and right coils 72, 72 molded integrally, as shown in FIG. On the other hand, the magnetic pole portions 64 and 64 of the pair of stator portions 108 and 108 are inserted, the coils 72 and 72 are assembled to the stator 54, and then the leaf springs 66 and 66 are vertically moved via the spacer 69. The bolts 67 may be overlapped and passed through the through hole 110 of the stator 54 and the left and right through holes 112 of the leaf spring and fastened.

  In the vibration isolator of the present embodiment, a circular through hole 120 is provided on the axis of the mover 56, that is, in the center of the bottom plate portion 40a, in the bottom plate portion 40a of the lower metal fitting 40 of the holding member 34. The bolt member 58 c of the mover 56 can be inserted from the through hole 120. In addition, a circular through-hole 122 having the same diameter and the same diameter as the through-hole 120 is provided at the center of the auxiliary member 98 fixed on the upper surface of the bottom plate portion 40a. The auxiliary member 98 is fixed to the bottom plate portion 40a in a sealed state over the entire circumference around the through hole 122.

  These through holes 120 and 122 are closed by a cylindrical plug member 124 made of a rubber elastic body. A pair of upper and lower circumferential grooves 128 and 130 are provided on the peripheral wall 126 of the plug member 124 over the entire circumference. Further, the lower flange portion 132 below the lower circumferential groove 130 is formed to have a larger diameter than the middle flange portion 134 between the upper and lower circumferential grooves 128, 130, and is larger than the upper circumferential groove 128. The upper upper flange portion 136 is formed with a smaller diameter than the middle flange portion 134 (see FIG. 9). The upper flange portion 136 is chamfered at the tip end. The plug member 124 having such a configuration is press-fitted from below the through hole 120 of the bottom plate portion 40a after being fastened by the bolt member 58c, so that the peripheral edges of the through holes 128, 130 are inserted into the upper and lower circumferential grooves 128, 130. The part is externally fitted to block both through holes 128 and 130.

  By providing such a plug member 124, it is possible to avoid intrusion of water and foreign matter into the holding member 34 from the bottom side of the holding member 34, while preventing damage to the mover 56 and the coil 72, Smooth movement of the mover 56 can be ensured. The plug member 124 is also useful for preventing abnormal noise caused by contact between the lower end of the movable element 56 and the bottom surface of the holding member 34.

  In FIG. 7, reference numeral 138 denotes a packing for the connection terminal portion 106 of the coil 72, around a through hole (not shown) for exposing the connection terminal portion 106 to the outside from the bottom surface of the holding member 34. Thus, the space between the bottom surface of the holding member 34 and the connection terminal portion 106 is sealed.

  In FIG. 7, reference numeral 140 denotes a control unit for the vibration isolator connected to the connection terminal unit 106, and the first liquid is supplied from the engine via the bracket 1, the first fixture 10, and the vibration isolator base 14. The vibration plate 24 is driven to vibrate so as to give a vibration having an opposite phase to the vibration transmitted to the chamber 16, thereby canceling the vibration.

  Other configurations and operational effects are the same as those of the first embodiment described above, and a description thereof will be omitted.

[Third Embodiment]
FIG. 11 shows an active liquid-filled vibration isolator that is assembled as an engine mount of an automobile according to the third embodiment. This anti-vibration device has the same basic configuration as that of the second embodiment, and hereinafter, common portions are denoted by the same reference numerals, and different portions will be described.

  In the vibration isolator in this embodiment, the structure of the crimp fixing part which couple | bonds and integrates the 2nd fixture main body 33 and the holding member 34 differs from the said embodiment.

  Specifically, the second fixture main body 33 includes a cylindrical first tube fitting 28 in which the vibration-proof base 14 is vulcanized and bonded to the inner periphery, and a cylindrical second tube in which the diaphragm 18 is vulcanized and bonded. It is comprised with the metal fitting 32. The holding member 34 includes a bottomed cylindrical inner metal fitting 150 that accommodates and holds the actuator 26, and a cylindrical outer metal fitting 152 that surrounds the outer periphery of the inner metal fitting 150 and has a support bracket 38 fixed to the outer peripheral surface thereof. It consists of

  A first flange 32a projecting outward in the radial direction X is provided at the lower end side opening of the second tube fitting 32, and a cylindrical caulking tube is formed downward from the tip of the first flange 32a. The portion 32b extends in the axial direction Z. In addition, a second flange 152a projecting outward in the radial direction X is provided in the upper end side opening of the outer metal fitting 152, and a second flange 152a projecting outward in the radial direction X is provided in the upper end side opening of the inner metal fitting 150. 3, and a fourth flange 28 a projecting outward in the radial direction X is provided at the lower end side opening of the first tubular fitting 28.

  Further, a ring-shaped annular fitting 30 provided on the outer peripheral edge of the vulcanization support rubber 46 is formed with a cylindrical press-fit portion 30a bent in the axial direction Z from the outer peripheral edge toward the holding member 34. As shown in FIG. 12, this cylindrical press-fit portion 30a is formed so as to be press-fit into the caulking tube portion 32b without any gap.

  At the time of caulking, the fourth flange 28a, the annular fitting 30, the third flange 150a, and the second flange 152a are superposed in this order on the first flange 32a, and the caulking tube portion 32b is used. It is fixed by caulking so that it wraps around. At that time, in a state where the cylindrical press-fit portion 30a of the annular metal fitting 30 is press-fitted into the caulking tube portion 32b, the tip is pressed against the outer peripheral edge portion of the second flange 152a in the axial direction. In addition, about the 3rd flange 150a and the 4th flange 28a, the clearance gap is ensured by radial direction between the outer periphery and the crimping cylinder part 32b.

  As described above, the cylindrical press-fit portion 30a is provided in the annular fitting 30 of the vibration plate 24, and the cylindrical press-fit portion 30a is press-fitted into the caulking tube portion 32b of the second cylindrical fitting 32. Centering between the vibration plate 24 and the second fixture body 33 can be performed.

  In the present embodiment, the upper end portion of the outer metal fitting 152 is a small diameter cylindrical portion 152b having a smaller diameter than the lower end portion, and the inner metal fitting 150 is formed to fit inside the small diameter cylindrical portion 152b without a gap. ing. The outer metal fitting 152 and the inner metal fitting 150 are positioned in the radial direction X by the fitting with the small diameter cylindrical portion 152b.

  In the present embodiment, a rubber layer 154 connected to the vibration supporting rubber 46 is interposed between the third flange 150a and the annular metal fitting 30, and the rubber layer 154 is connected to the third flange 150a during caulking and fixing. It is configured to be held in a compressed state in the axial direction between the annular metal fitting 30. As a result, vibration of high frequency components of the actuator 26 can be absorbed, and an assembly error in the axial direction Z between the vibration plate 24 and the holding member 34 can be absorbed.

  Further, in the present embodiment, an annular seal rubber protrusion 156 is integrally formed on the upper surface of the annular metal fitting 30 by rubber continuous from the vibration supporting rubber 46, and this seal rubber protrusion 156 is provided at the lower end portion of the first cylindrical metal fitting 28. The first liquid chamber 16 is sealed by being pressed against the lower surface of the stepped portion 158.

  Other configurations and operational effects are basically the same as those of the second embodiment described above, and a description thereof will be omitted.

[Fourth Embodiment]
FIG. 13 shows an active liquid-filled vibration isolator that is assembled as an engine mount of an automobile according to the fourth embodiment. This embodiment is a modification of the annular fitting 30 on the outer periphery of the vibration plate 24 in the third embodiment, and the configuration other than the annular fitting 30 is the same as that of the third embodiment.

  In this example, a cylindrical portion 30b is extended in the axial direction Z toward the inner peripheral edge portion of the annular metal fitting 30, and the outer end of the cylindrical portion 30b (that is, the lower end) is directed outward in the radial direction X. The positioning extension 30c is provided, and therefore the annular metal fitting 30 has a substantially U-shaped cross section. The positioning extension 30c is configured such that the tip (that is, the outer peripheral end) contacts the inner peripheral surface of the inner metal fitting 150, in other words, the positioning extension 30c is press-fitted into the inner metal fitting 150. Thus, the annular metal fitting 30 is positioned in the radial direction X with respect to the inner peripheral surface of the holding member 34. Therefore, misalignment between the vibration plate 24 and the holding member 34 is more reliably prevented.

[Control method]
Next, a control method of the active liquid filled type vibration isolator according to the embodiment will be described. Below, the control method about the vibration isolator of 2nd Embodiment is demonstrated, However, It can carry out similarly in other embodiment.

  As described above, the vibration transmitted from the engine to the first liquid chamber 16 is not a simple sine wave vibration but a vibration having a waveform in which vibrations of respective order components of the engine rotation are combined. For example, in a V-type 6-cylinder engine, vibrations of order components such as primary rotation, 1.5th order, second order, and sixth order are generated in addition to the third order component of engine rotation that is vibration of explosion for each cylinder. To do.

  FIG. 14 shows a waveform of engine vibration (the first fixture 10 on the engine side and the first on the vehicle side) transmitted to the vibration isolator at 600 rpm (the number of revolutions per minute; the same applies hereinafter) of a certain V-type six cylinder engine. 2 shows a waveform of relative displacement between the two fixtures 12). When this was subjected to frequency analysis by FFT (Fast Fourier Transform), it was decomposed into vibrations of a specific frequency component as shown in FIG. 15, and the ratio of each order component constituting the engine vibration as shown in FIG. found.

  As shown in FIG. 17, the component ratio changes according to the engine speed. Therefore, in order to reduce the engine vibration by applying to the vibration plate 24 the vibration of the reverse phase consisting of the inverted waveform that cancels the engine vibration transmitted to the vibration isolator, It is necessary to change the composition ratio of each order component in accordance with the rotational speed.

  For example, FIG. 18 shows the waveform of a sine wave of each order component that defines the amplitude according to the vibration component ratio at 600 rpm shown in FIG. By synthesizing this, as shown in FIG. 19, the vibration waveform of the vibration plate 24 at 600 rpm is obtained. This vibration waveform is composed of a waveform that is substantially opposite in phase to the engine vibration waveform, that is, an inverted waveform. The vibration of the vibration waveform is the engine vibration (the hydraulic pressure of the first liquid chamber 16). The phase is matched with the fluctuation) and applied to the vibration plate 24. As shown in FIG. 20, the engine vibration waveform can be reduced by the vibration waveform in an offset manner (the reduced waveform is a composite waveform). As shown). The phase adjustment can be performed with reference to the ignition timing of the first cylinder, for example.

  Further, for example, at 2000 rpm, the vibration component ratio is as shown in FIG. 21. Therefore, the waveform of the sine wave of each order component that defines the amplitude according to this vibration component ratio is as shown in FIG. By synthesizing this, as shown in FIG. 23, the vibration waveform of the vibration plate 24 at 2000 rpm is obtained. Therefore, the vibration of the vibration waveform may be applied to the vibration plate 24 after phase matching with the engine vibration.

  As described above, in the present embodiment, the composition ratio of each order component of the engine rotation is changed according to the engine speed, and the excitation waveform obtained by synthesizing the sine waves of the order components is created. Based on the above, the vibration plate 24 is controlled to be driven to vibrate. More specifically, a map (for example, a list in which the ratios of the respective order components are obtained every 5 rpm) for which the correspondence relationship between the engine speed and the ratios of the respective order components is obtained is created and stored in the memory 142 ( (See FIG. 7). Then, the engine speed information detected by the engine speed detection means 144 (see FIG. 7) is input to the control unit 140, and the control unit 140 synthesizes the engine at a ratio corresponding to the speed. Then, an electric current is sent to the coil 72 to vibrate the vibration plate 24, thereby reducing vibration from the engine.

  In this way, according to changes in the engine speed, vibrations taking into account the component ratio of each order component are applied to the vibration plate 24 in an opposite phase to the engine vibrations, thereby effectively canceling the engine vibrations. can do. In particular, according to the present invention, since the mover 56 is fixed to the vibration plate 24 by the magnet 74 as described above, the movable member 56 is movable by absorbing the misalignment between the axis of the mover 56 and the vibration plate 24. The smooth movement of the child 56 can be ensured, and therefore, control deviation can be suppressed and more excellent anti-vibration performance can be exhibited.

[Other Embodiments]
In the present invention, the present invention is not limited to the dual-amplitude drive type actuator as described above. For example, the present invention is applicable to various electromagnetic linear actuators such as a moving magnet type in which a permanent magnet is provided on a mover and a solenoid type. Can do. Further, the present invention can be applied not only to a type in which the mover is driven in the hollow portion of the stator, but also to a type in which the mover surrounds the outer periphery of the stator.

  The present invention is not limited to an engine mount, and can be used in various ways. For example, the present invention can also be applied to a mount provided between a suspension member and a vehicle body side frame. Further, the main body structure of the liquid-filled vibration isolator is not limited to the structure shown in the figure, and various modifications can be made.

1 is a longitudinal sectional view of an active liquid-filled vibration isolator according to a first embodiment of the present invention. Sectional drawing which shows the example of a change of the connection structure of a needle | mover and a vibration board Sectional drawing which shows the further example of a change of the connection structure of a needle | mover and a vibration board Schematic illustration showing the action of the actuator Schematic explanatory diagram showing the action of the actuator when a current is passed through the coil in the positive direction Schematic explanatory diagram showing the action of the actuator when a current is passed through the coil in the reverse direction The longitudinal cross-sectional view of the active type liquid enclosure type vibration isolator which concerns on 2nd Embodiment of this invention. The perspective longitudinal cross-sectional view seen from diagonally upward of the vibration isolator. The perspective longitudinal cross-sectional view seen from diagonally downward of the vibration isolator. The disassembled perspective view of the actuator of the vibration isolator. The longitudinal cross-sectional view of the active type liquid enclosure type vibration isolator which concerns on 3rd Embodiment of this invention. The principal part expansion longitudinal cross-sectional view of the active type liquid enclosure type vibration isolator which concerns on 3rd Embodiment. The longitudinal cross-sectional view of the active type liquid enclosure type vibration isolator which concerns on 4th Embodiment of this invention. The graph which shows an example of the engine vibration waveform at 600 rpm. The graph which shows the relationship between the frequency of an engine vibration waveform in 600 rpm, and a vibration level. The graph which shows the component ratio of each order component of the engine vibration at 600 rpm. The graph which shows the relationship between an engine speed and the vibration level of each order component. The graph which shows the waveform of the sine wave of each order component in 600 rpm. The graph which shows the excitation waveform for damping engine vibration of 600 rpm. The graph which shows the vibration reduction effect in 600 rpm. The graph which shows the component ratio of each order component of the engine vibration at 2000 rpm. The graph which shows the waveform of the sine wave of each order component in 2000 rpm. A graph which shows an excitation waveform for controlling engine vibration at 2000 rpm.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... 1st fixture, 12 ... 2nd fixture, 14 ... Anti-vibration base | substrate, 16 ... 1st liquid chamber, 18 ... Diaphragm, 20 ... 2nd liquid chamber, 22 ... Orifice channel | path, 24 ... Excitation board, 26 ... actuator, 30 ... annular fitting, 30a ... cylindrical press-fit part, 30b ... cylindrical part, 30c ... positioning extension part, 32a ... first flange, 32b ... caulking cylinder part, 33 ... second fitting body, 34 DESCRIPTION OF SYMBOLS ... Holding member, 40a ... Bottom plate part, 46 ... Excitation support rubber, 48 ... Connection part, 54 ... Stator, 56 ... Movable element, 56a ... Tip part of the mover, 58 ... Shaft member, 60 ... Magnetic material part, 64: Magnetic pole part, 68, 70 ... Permanent magnet, 72 ... Coil, 74 ... Magnet, 98 ... Auxiliary member, 120 ... Through hole in bottom plate part, 122 ... Through hole in auxiliary member, 124 ... Plug member, 128, 130 ... Circumferential groove, 140 ... control unit, 152a ... second flange, Z Axial, X ... radially, L ... Axis of the second fitting

Claims (9)

A first fixture, a second fixture, a vibration isolating base made of a rubber-like elastic body connecting the first fixture and the second fixture, and a first anti-vibration base forming a part of a chamber wall. A liquid chamber, a vibration plate forming another part of the chamber wall of the first liquid chamber, and a vibration plate disposed on the opposite side of the first liquid chamber across the vibration plate. An active liquid-filled vibration isolator comprising an actuator to be driven,
The actuator is fixed to the second fixture side, and is movable so as to be reciprocally movable with respect to the stator and connected to the vibration plate to drive the vibration plate. An active liquid characterized in that the tip of the movable element is adsorbed and fixed to the vibration plate by a magnet provided on at least one of the movable element and the vibration plate. Enclosed vibration isolator. The second fixture has a cylindrical shape, and the vibration isolation base is fixed to one side in the axial direction of the second fixture, and is opposed to the vibration isolation base in the axial direction of the second fixture. The vibration plate is disposed;
The vibration plate is provided with a connecting portion for the mover at a central portion and a vibration supporting rubber on an outer peripheral portion, and is supported on the second fixture side via the vibration supporting rubber,
The mover is provided so as to be able to reciprocate in the axial direction of the second fixture, and the tip portion is coupled to the connecting portion so as to vibrate the vibration plate in the axial direction of the second fixture. The active liquid-filled vibration isolator according to claim 1, which is configured.   A diaphragm made of a rubber film covering the vibration isolating base on the outer peripheral side of the vibration isolating base is provided across the first mounting tool and the second mounting tool, and a diaphragm is provided between the diaphragm and the outer peripheral surface of the vibration isolating base. 3. An active liquid-filled vibration isolator according to claim 2, wherein two liquid chambers are provided, and the second liquid chamber communicates with the first liquid chamber through an orifice passage. The mover includes a shaft member coupled to the vibration plate, and a magnetic material portion attached to an outer peripheral surface of the shaft member,
The stator has a magnetic pole portion that is arranged on an outer periphery of the magnetic material portion and protrudes radially inward, and the magnetic pole portion has at least a pair of adjacent poles adjacent to each other in the axial direction. Permanent magnets are arranged, and a coil is wound around the magnetic pole portion. The combination of the magnetomotive force generated by excitation of the coils and the magnetomotive force of each permanent magnet allows the mover to be pivoted. 4. The active liquid filled type vibration damping device according to claim 2, wherein the vibration damping device is configured to reciprocate in a direction.   5. The active liquid-filled vibration isolator according to claim 4, wherein a plurality of pairs of the permanent magnets are provided side by side in the axial direction. The first fixture is attached to the engine side, and the second fixture is attached to the vehicle body side,
A control unit for driving the vibration plate to vibrate so as to cancel vibration transmitted from the engine is provided, and the control unit determines a sine wave of each order component of the engine rotation according to the engine speed. 6. The active type according to claim 1, wherein vibration from the engine is reduced by driving the vibration plate based on a vibration waveform synthesized in accordance with a ratio. Liquid-filled vibration isolator. The second fixture includes a second fixture body coupled to the vibration-proof base and a bottomed cylindrical holding member that accommodates and holds the actuator, and the movable element is pivoted in the holding member. It is provided so that it can reciprocate in the direction,
The bottom plate portion of the holding member is provided with a through hole on the axis of the movable element, and an auxiliary member having a through hole coaxial with the through hole is fixed on the upper surface of the bottom plate portion, and the two through holes are provided. It is closed with a plug member made of rubber-like elastic material,
The plug member includes a pair of upper and lower circumferential grooves on the peripheral wall portion, and is press-fitted from below into the through hole of the bottom plate portion, whereby each of the bottom plate portion and the auxiliary member is inserted into the upper and lower circumferential grooves. The active liquid-filled vibration isolator according to any one of claims 1 to 6, wherein a peripheral edge portion of the through hole is fitted to close both the through holes. An annular metal fitting is provided on the outer peripheral edge of the vulcanized support rubber, and the vibration plate is fixed to the second fixture via the annular metal fitting,
The second fixture includes a cylindrical second fixture main body coupled to the vibration isolation base and a cylindrical holding member that accommodates and holds the actuator, and one axial direction of the second fixture main body. The anti-vibration base is fixed to the side, a caulking tube portion is provided through an opening on the other axial side of the second fixture body via a first flange, and a second portion is provided in one opening of the holding member. The flange is provided,
A cylindrical press-fit portion extends in the axial direction from the outer peripheral edge of the annular metal fitting toward the holding member, and the caulking is fixed by the caulking tube portion in a state where the cylindrical press-fit portion is press-fitted into the caulking tube portion. The active liquid-filled vibration isolator according to claim 2, wherein the annular fitting is sandwiched and fixed between the first flange and the second flange. The annular fitting extends in the axial direction toward the inside of the holding member, and extends radially outward from the tip of the cylindrical portion to the inner peripheral surface of the holding member. An active liquid-filled vibration isolator according to claim 8, further comprising a positioning extending portion that positions the annular fitting in a radial direction.

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