JP2008064138A - Active damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an active damper having a new structure, in which a feed lead wire connected to a coil member arranged in the active damper can be easily taken out to the side opposite to an elastic member. <P>SOLUTION: An inner shaft member 34 extending to the direction of relative displacement of the coil member 14 and a yoke member 18 is provided, such that the coil member 14 is fixedly supported by the inner shaft member 34. A cylindrical sleeve member 36 is externally fitted and fixed to one axial end part of the inner shaft member 34, such that the yoke member 18 is elastically supported by the sleeve member 36 via the elastic member 88. An internal space 42 is formed in the inner peripheral side of the sleeve member 36 and a notch hole 46 for communicating the internal space 42 with the outer peripheral face is formed in an end part of the sleeve member 36 in the connection side with the inner shaft member 34. By inserting the feed lead wire 26 to the coil member 14 from the notch hole 46 to the internal space 42 of the sleeve member 36, the feed lead wire 26 is taken out to the side opposite to the coil member 14, sandwiching the elastic member 88. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an active vibration damper that is attached to a vibration suppression target member and actively or cancelably reduces vibration to be controlled.

  Conventionally, as a means for reducing the vibration of a vibration suppression target member where vibration is a problem, such as a car body of an automobile, for example, an excitation force according to the vibration to be controlled is attached to the vibration suppression target member. Active vibration dampers are known that actively reduce vibration by generating them. As such an active vibration damper, for example, there is one described in Patent Document 1 (Japanese Patent Laid-Open No. 2001-227581).

  Such an active vibration damper is an actuator for generating an excitation force corresponding to the vibration to be controlled in order to exert an excitation force on the mass member elastically supported by the member to be controlled. It has. As such an actuator, a pneumatic actuator or the like has been proposed, but an electromagnetic actuator is preferably employed. Covered and active type vibration dampers are effective because it is effective to apply an excitation force corresponding to the vibration to be controlled to the mass member with high accuracy in order to exert an effective vibration suppression effect. An electromagnetic actuator that can easily and accurately control the magnitude, frequency, phase, and the like of the exciting force is advantageously employed.

  As such an electromagnetic actuator, those having various structures are known. For example, there is an electromagnetic actuator shown in FIG. That is, a cylindrical coil member is disposed on the stator, a yoke member disposed coaxially with the coil member and inserted into the coil member on the mover, and a permanent member positioned on the outer peripheral side of the coil member. A magnet is provided, and the movable member as a mass member is driven and displaced relative to the stator by the action of a magnetic field generated by energizing the coil of the coil member, and an expected excitation force is generated. It is like that.

  By the way, in order to operate such an electromagnetic actuator, it is necessary to supply power from an external power source to the coil. In the active vibration damper shown in FIG. The coil is fed with power.

  However, in such an electromagnetic actuator having the structure described in Patent Document 1, a plurality of lead wires connected to a coil disposed inside the active vibration damper constitute an active vibration damper. It is necessary to lead to and connect to an external power source disposed outside the active vibration damper. Therefore, it is necessary to form through holes into which the lead wires can be inserted into the plurality of members, and to assemble the plurality of members in a state where the through holes are aligned with each other, which is difficult to manufacture. There is a problem. Also, even if a plurality of members with through holes formed can be assembled in a state where they are positioned with respect to each other, the through holes are formed with a diameter approximately the same as the thickness of the lead wire in order to prevent the entry of foreign matter from the outside. For this reason, the operation of inserting the lead wire into the through-hole tends to be difficult.

  Moreover, since the exposed position of the lead wire is the position where the central portion in the direction perpendicular to the axis is out of the outer peripheral side, depending on the position in the power source, the actuator installation space, etc., it depends on the direction in the circumferential direction. In some cases, the handling of the lead wire becomes a problem.

JP 2001-227581 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is a power supply lead wire connected to a coil member disposed in an active vibration damper. It is an object to provide an active vibration damper having a novel structure that can be easily taken out to the opposite side of the elastic member.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible. Further, aspects or technical features of the present invention are not limited to those described below, but are described in the entire specification and drawings, or an invention that can be understood by those skilled in the art from those descriptions. It should be understood that it is recognized based on thought.

  That is, the active vibration damper having a structure according to the present invention is characterized in that the coil member and the yoke member are disposed so as to be relatively displaceable, and the coil member and the yoke member are An electromagnetic actuator that generates a vibration force between the coil member, the coil member is attached to the vibration suppression target member, and the yoke member is elastically supported by the vibration suppression target member In the vibration damper, an inner shaft member extending in a relative displacement direction of the coil member and the yoke member is provided, and the coil member is fixedly supported by the inner shaft member, and one of the inner shaft members in the axial direction is supported. A cylindrical sleeve member is fitted and fixed to the end, and the yoke member is elastically supported by the sleeve member via an elastic member, while the sleeve member is placed on the inner peripheral side of the sleeve member. A notch hole is formed at the end of the sleeve member connected to the inner shaft member, and a lead wire for feeding power to the coil member is provided in the notch hole. By inserting the elastic member from the hole into the inner space of the sleeve member, the sleeve member is taken out on the opposite side of the coil member.

  In such an active vibration damper having a structure according to the present invention, the lead wire for feeding power to the coil member is taken out on the side opposite to the coil member by utilizing the internal space formed on the inner peripheral side of the sleeve member. Thus, the feeding lead wire can be easily taken out without specially forming an insertion hole through which the feeding lead wire is inserted.

  Further, it is desirable that the sleeve member is fixedly provided with an attachment member having an attachment portion for the vibration suppression target member. Note that such an attachment member may be formed separately from the sleeve member and fixed to the sleeve member by press-fitting or welding, or may be integrally formed at the end of the sleeve member. Further, for example, the attachment member may be constituted by a sleeve member, and the end of the sleeve member may be directly fixed to the vibration suppression target member by welding, bolt fixing, press fitting, or the like.

  More preferably, the mounting member is configured by fixing a base member that is located on the outer side in the axial direction of the elastic member and that extends from the sleeve member toward the outer peripheral side. A cover member having a bottomed cylindrical shape is assembled so as to cover the yoke member from the axial direction opposite to the fixing side of the sleeve member in the inner shaft member, and the opening of the cover member is covered with the base member. Accordingly, the base member and the cover member can cooperate to form a sealed air chamber that is isolated from the external space and accommodates the electromagnetic actuator.

  According to this, a sealed air chamber isolated from the external space is formed, and an electromagnetic actuator is accommodated in the sealed air chamber, thereby preventing entry of foreign matter such as water and dust from the outside. Thus, the durability of the electromagnetic actuator can be improved. In addition, even when the coil member is accommodated in the sealed air chamber separated from the external space by the base member and the cover member, the power supply lead wire can be easily taken out to the external space using the internal space of the sleeve member. I can do it.

  The yoke member is formed with an insertion hole penetrating in the axial direction. The inner shaft member is inserted through the insertion hole, and the insertion end portion of the inner shaft member has the insertion hole. It is desirable that a second elastic member for elastically connecting the inner shaft member to the yoke member is provided. According to this, the yoke member that is relatively displaced with respect to the coil member is elastically supported in at least two locations in the axial direction, and displacement other than the driving direction such as swinging displacement is effectively performed. It can be suppressed.

  More preferably, the elastic member that connects the yoke member to the sleeve member is made of a rubber elastic body, and the second elastic member that connects the yoke member to the inner shaft member is a metal leaf spring. It consists of

  Further, the elastic member for connecting the yoke member to the sleeve member is constituted by a rubber elastic body having an annular plate shape, and the fitting cylinder fitting is fixed to the inner peripheral surface of the rubber elastic body. And a seal rubber layer is formed on the inner peripheral surface of the fitting tube fitting, and the seal rubber layer is provided between the fitting surfaces of the fitting tube fitting and the sleeve member. It is desirable to seal.

  According to this, the rubber elastic body can be easily assembled to the sleeve member by externally fixing the fitting cylindrical fitting to the sleeve member, and the gap between the fitting cylindrical fitting and the fitting surface of the sleeve member can be set. By sealing with the sealing rubber layer, it is possible to reduce or avoid a decrease in the durability of the electromagnetic actuator caused by foreign substances such as water entering between the fitting surface of the fitting tube fitting and the sleeve member.

  The sleeve member is opened at an axial end opposite to the outer fitting fixing side with respect to the inner shaft member, and the lead wire for power feeding is taken out to the external space through the opening at the axial end. In addition, it is desirable that a seal member is attached to the opening at the axial end. According to this, the seal member attached to the opening at the axial end of the sleeve member prevents foreign matter from entering from the external space through the internal space of the sleeve member, thereby improving the durability of the electromagnetic actuator. I can do it.

  Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 and FIG. 2 show an active vibration damper 10 as one embodiment of the present invention. The active vibration damper 10 includes an electromagnetic vibrator 12 as an electromagnetic actuator. The electromagnetic exciter 12 includes a coil member 14 and is configured to include a stator 16 fixedly assembled to a damping target member (not shown) and a yoke fitting 18 as a yoke member. A mover 20 that is elastically connected is provided, and the mover 20 is driven and displaced with respect to the stator 16 by energization of the coil member 14. In the following description, the up and down direction refers to the up and down direction in FIG. 1 that is the driving direction of the mover 20 relative to the stator 16.

  More specifically, the stator 16 includes a coil member 14, and the coil member 14 is configured by winding a coil 22 around a bobbin 24. The coil 22 is connected to an external power supply device 28 by a power supply lead wire 26. The bobbin 24 is formed of a nonmagnetic material such as a hard synthetic resin material and has a substantially bottomed cylindrical shape as a whole. Further, the peripheral wall portion of the bobbin 24 is formed with a concave groove opening in the outer peripheral surface so as to continuously extend in the circumferential direction, and the coil 22 is formed in the peripheral wall portion of the bobbin 24 so as to be accommodated in the concave groove. It is wound. In addition, a fixed cylindrical portion 30 protruding upward in the axial direction is integrally formed at the center of the bottom wall of the bobbin 24, and a hole extending on the central axis of the fixed cylindrical portion 30 extends in the axial direction on the bottom wall of the bobbin 24. It is formed through. In the present embodiment, the power supply lead wire 26 is fixed to the outer peripheral surface and the bottom surface of the bobbin 24 and the outer peripheral surface of a sleeve fitting 36 described later, and is disposed so as to extend along the surface of those members. .

  A support fitting 32 is assembled to the fixed cylinder portion 30 of the bobbin 24. The support fitting 32 includes a shaft fitting 34 as an inner shaft member and a sleeve fitting 36 as a sleeve member. The shaft bracket 34 has a small-diameter rod shape extending linearly up and down in the axial direction, which is the relative displacement direction of the mover 20 with respect to the stator 16, and each includes an upper and lower rod bracket 38 formed of a nonmagnetic material. 40 are connected to each other in the axial direction. Further, the fixed cylindrical portion 30 of the bobbin 24 is fitted and fixed to the shaft fitting 34, and the coil member 14 is fixedly assembled to the shaft fitting 34.

  Further, a sleeve fitting 36 is assembled to the lower end portion of the shaft fitting 34. As shown in FIGS. 3 and 4, the sleeve fitting 36 has a substantially cylindrical shape as a whole, and has a central hole 42 linearly extending on the central axis with a substantially constant circular cross section. . In particular, in this embodiment, the internal space of the sleeve metal fitting 36 is formed using the central hole 42 of the sleeve metal fitting 36. In addition, a stepped portion 44 is provided at a part of the middle in the axial direction on the outer peripheral surface of the sleeve fitting 36, and the outer diameter of the sleeve fitting 36 on the upper side across the stepped portion 44 is outside the sleeve fitting 36 on the lower side. The diameter is larger than the diameter.

  Further, the sleeve fitting 36 is formed with a slit 46 as a notch hole that opens in the upper end surface and penetrates in the thickness direction. The slit 46 is formed by being cut at a predetermined depth in the axial direction from the upper end of the sleeve fitting 36, and the outer peripheral side and the inner peripheral side (center hole 42) of the sleeve fitting 36 are communicated with each other through the slit 46. ing.

  In addition, a disc-shaped seal member 48 is fitted in the axially lower opening of the sleeve fitting 36. The seal member 48 is formed of a rubber elastic body, and the outer peripheral surface of the seal member 48 is brought into close contact with the inner peripheral surface of the central hole 42 of the sleeve metal fitting 36, thereby lowering the axial direction of the central hole 42 of the sleeve metal fitting 36. The opening on the side is closed in a sealed state by a seal member 48.

  Then, the lower end portion of the shaft fitting 34 is press-fitted into the upper end portion of the central hole 42 of the sleeve fitting 36, whereby the sleeve fitting 36 is fixed to the shaft fitting 34, and the axial direction is on the same central axis as the shaft fitting 34. It arrange | positions so that it may extend below. The slit 46 formed in the upper part of the sleeve metal fitting 36 is positioned below the lower end of the shaft metal piece 34 in the state where the sleeve metal piece 36 is assembled. In a part of the peripheral wall, the space on the outer peripheral side of the sleeve metal fitting 36 is communicated with the central hole 42 through the slit 46.

  Further, the upper end surface of the sleeve fitting 36 is overlapped with the lower end surface of the bobbin 24 assembled to the lower end portion in the axial direction of the shaft fitting 34 from below in the axial direction. It is positioned and assembled with.

  Further, the upper end portion in the axial direction of the shaft fitting 34 and the lower end portion in the axial direction of the sleeve fitting 36 are respectively fixed to the case fitting 50. The case metal fitting 50 is configured to include a bottom metal fitting 52 as a base member and a cover metal fitting 54 as a cover member that are combined vertically. The bottom metal fitting 52 has a thin-walled, large-diameter, generally bottomed cylindrical shape, and a fixed flange 56 that extends outward in the direction perpendicular to the axis is integrally formed at the periphery of the opening. Further, a through hole 58 that is a small-diameter circular hole is formed in the central portion of the bottom metal 52 in the radial direction, and an opening peripheral portion of the through hole 58 projects downward in the axial direction. Has been. On the other hand, the lid fitting 54 has a thin, reverse-facing bottomed cylindrical shape having a smaller diameter than the bottom fitting 52. Further, a caulking piece 62 that spreads outward in the direction perpendicular to the axis is integrally formed at the opening peripheral edge of the lid fitting 54. In addition, an upper fitting portion 64 having a small-diameter, reverse, substantially bottomed cylindrical shape is integrally formed at the center portion in the radial direction of the upper bottom wall portion of the lid fitting 54. It is projected upward in the axial direction.

  Then, the openings of the bottom metal 52 and the cover metal 54 are overlapped in the axial direction, and the fixing flange 56 of the bottom metal 52 and the caulking piece 62 of the cover metal 54 are overlapped in the axial direction, whereby the bottom metal 52 is overlapped. And the lid fitting 54 are positioned in the axial direction, and the fixing flange 56 of the bottom fitting 52 is caulked and fixed by the caulking piece 62 of the lid fitting 54, whereby the bottom fitting 52 and the lid fitting 54 are assembled together. . Further, the lower end portion of the sleeve fitting 36 is press-fitted and fixed to the lower fitting portion 60 of the bottom fitting 52, and the upper end portion of the shaft fitting 34 is press-fitted and fixed to the upper fitting portion 64 of the lid fitting 54. A support fitting 32 composed of a fitting 34 and a sleeve fitting 36 is fixed to the case fitting 50.

  A substantially annular seal rubber 66 is disposed between the overlapping surfaces of the fixing flange 56 and the caulking piece 62. The seal rubber 66 continuously extends in the circumferential direction with a substantially constant T-shaped cross section, and its upper end surface is overlapped with the caulking piece 62 of the lid fitting 54 from below in the axial direction, and the lower end surface of the outer peripheral portion. Is superimposed on the fixing flange 56 of the bottom metal 52 from above in the axial direction. In addition, on the outer peripheral portion of the seal rubber 66 in the present embodiment, seal protrusions that protrude outward in the axial direction and continuously extend in the circumferential direction with a substantially constant semicircular cross section are integrally formed and protruded. Yes. Under the assembled state of the bottom metal fitting 52 and the cover metal fitting 54, the seal ridges are brought into contact with the fixing flange 56 and the caulking piece 62 to be compressed and deformed. As a result, the fixing flange 56 and the caulking piece 62, and the overlapping surfaces of the bottom fitting 52 and the lid fitting 54 are hermetically sealed by the seal rubber 66, and the opening of the lid fitting 54 is covered with the bottom fitting 52. Has been.

  In addition, mounting legs 68 are fixedly provided on the bottom metal 52 at a plurality of locations on the circumference. The mounting leg portion 68 has a substantially curved plate shape and is fixed to the outer peripheral surface of the bottom fitting 52 by means of welding or the like, and is bent outward from the lower end portion of the fixing portion 70 in the direction perpendicular to the axis. A mounting plate portion 72 that extends as a result is integrally provided. A bolt hole 74 as an attachment portion is formed in the attachment plate portion 72 so as to penetrate the central portion, and is fixed to the vibration suppression target member by an attachment bolt (not shown) through which the bolt hole 74 is inserted. It has become. Thereby, the active vibration damper 10 according to the present embodiment is fixedly attached to a vibration damping target member (not shown). As is clear from this, the stator 16 in the present embodiment is formed by each member (the coil member 14, the shaft bracket 34, the sleeve bracket 36, the inner cylinder bracket 94 described later) fixed to the case bracket 50. It is configured. Further, the mounting member in the present embodiment is constituted by the bottom metal fitting 52 and the mounting leg portion 68. Further, the support fitting 32 constituted by the shaft fitting 34 and the sleeve fitting 36 is fixed to the mounting leg 68 via the case fitting 50.

  On the other hand, the mover 20 includes a yoke fitting 18. The yoke fitting 18 is formed of a thick ferromagnetic material having a substantially cylindrical shape as a whole, and an insertion hole 76 penetrating in the axial direction is formed at the radial center. Further, the insertion hole 76 formed in the yoke metal 18 is a circular hole having a larger diameter than the outer diameter of the shaft metal 34, and the shaft metal 34 is free to be inserted into the insertion hole 76 of the yoke metal 18. It is inserted and arranged on the same central axis.

  An accommodation concave groove 78 is formed in a substantially central portion of the yoke metal 18 in the thickness direction. The housing concave groove 78 has a groove shape that opens downward in the axial direction, and continuously extends over the entire circumference with a substantially constant cross-sectional shape.

  Further, a permanent magnet 80 is disposed in the housing concave groove 78 formed in the yoke fitting 18. The permanent magnet 80 has a substantially cylindrical shape, and the outer peripheral surface thereof is overlapped and fixed to the outer peripheral side wall surface of the housing concave groove 78. Further, the inner peripheral surface of the permanent magnet 80 and the side wall surface on the inner peripheral side of the housing concave groove 78 are opposed to each other with a predetermined distance in the direction perpendicular to the axis over the entire periphery. Further, the permanent magnet 80 has a magnetic pole formed in a direction perpendicular to the axis, and when the permanent magnet 80 is attached to the yoke fitting 18, a magnetic field using the yoke fitting 18 as a magnetic path is formed.

  The yoke fitting 18 is fitted and fixed to the cylindrical housing 82. The cylindrical housing 82 has a substantially cylindrical shape and is externally fixed to the yoke fitting 18. In addition, the upper end of the cylindrical housing 82 is an inner flange-shaped inward protruding portion 84 bent inward in the direction perpendicular to the axis, and the lower end in the axial direction of the cylindrical housing 82 is outward in the direction perpendicular to the axis. The flange-shaped outward projecting portion 86 is bent into a bent shape.

  In addition, the needle | mover 20 in this embodiment is comprised including the yoke metal fitting 18, the permanent magnet 80, the cylindrical housing 82, and the outer cylinder metal fitting 96 mentioned later. In addition, the mass member in the present embodiment is configured integrally with the mover 20 including the yoke fitting 18 and the permanent magnet 80, and the purpose is achieved by exciting the mover 20 having a predetermined mass. Generating power to be obtained.

  The stator 16 and the mover 20 are elastically connected by a support rubber elastic body 88 as an elastic member and a leaf spring 90 as a second elastic member. As shown in FIG. 5, the support rubber elastic body 88 is formed of a rubber elastic body having a substantially annular plate shape that gradually becomes thinner toward the outer peripheral side. Further, an inner cylinder fitting 94 as a fitting cylinder fitting fixed to the sleeve fitting 36 is vulcanized and bonded to the inner peripheral edge of the support rubber elastic body 88. Further, an outer cylinder fitting 96 fixed to the yoke fitting 18 via a cylindrical housing 82 is vulcanized and bonded to the outer peripheral edge portion of the support rubber elastic body 88. In the present embodiment, the inner cylinder fitting 94 is positioned slightly below the outer cylinder fitting 96 in the axial direction, and the support disposed between the opposed surfaces of the inner cylinder fitting 94 and the outer cylinder fitting 96 is supported. The rubber elastic body 88 has a concave shape that inclines downward toward the center in the direction perpendicular to the axis.

  The inner cylinder fitting 94 has a small-diameter substantially cylindrical shape, and an insertion hole 98 penetrating in the axial direction is formed in a central portion in the radial direction. Further, the upper end portion of the inner cylindrical metal fitting 94 is bent and extends inward in the direction perpendicular to the axis. In addition, a flange portion 100 that extends outward in a direction perpendicular to the axis is integrally formed in the opening on the lower side of the inner tubular fitting 94. The flange portion 100 has a step at an intermediate portion in a direction perpendicular to the axis, and the center side of the step is positioned higher in the axial direction than the outer peripheral side.

  Further, a seal rubber layer 102 is vulcanized and bonded to the inner peripheral surface of the inner cylinder fitting 94. The seal rubber layer 102 is integrally formed with the support rubber elastic body 88 through a plurality of through holes 104 formed in the peripheral wall portion of the inner cylinder fitting 94. The seal rubber layer 102 is formed so as to cover from the inner peripheral surface of the upper bottom wall portion of the inner cylindrical fitting 94 to the inner peripheral portion of the flange portion 100 integrally formed with the lower end portion of the inner cylindrical fitting 94. The inner peripheral surface of the peripheral wall portion of the inner cylindrical metal fitting 94 is covered with the seal rubber layer 102 over substantially the entire surface.

  Further, as shown in FIG. 5, the seal rubber layer 102 has seal protrusions 106 and 108 formed on the inner peripheral surface and the lower end surface thereof, respectively. The seal protrusion 106 is continuously formed over the entire circumference with a substantially constant semicircular cross section, and protrudes radially inward from the inner peripheral surface of the seal rubber layer 102. Furthermore, the seal protrusion 106 is protruded to the inner peripheral side from the inner peripheral end surface of the inner tubular fitting 94 (opening edge portion of the insertion hole 98). Further, the seal protrusion 108 is continuously formed over the entire circumference with a semicircular cross section substantially the same as the seal protrusion 106, and the inner peripheral portion of the flange portion 100 formed at the lower end of the inner cylindrical metal fitting 94. And projecting downward in the axial direction from the sealing rubber layer 102 secured to the surface. Further, the seal protrusion 108 protrudes downward in the axial direction from the lower end surface of the inner tubular fitting 94 (the lower end of the outer peripheral portion of the flange portion 100).

  On the other hand, as shown in FIG. 6, the outer cylinder fitting 96 has a thin, substantially cylindrical shape having a larger diameter than the inner cylinder fitting 94, and is arranged on the same central axis as the inner cylinder fitting 94. It is provided, and is spaced apart from the peripheral wall portion of the inner cylindrical metal piece 94 by a predetermined distance outward in the direction perpendicular to the axis.

  Further, the outer tube fitting 96 is provided with caulking portions 110 protruding upward at a plurality of locations on the circumference. A plurality of the caulking portions 110 are formed over a predetermined length in the circumferential direction in the opening portion on the upper side in the axial direction of the outer cylindrical metal fitting 96, and are projected upward in the axial direction. In the present embodiment, the caulking portions 110 are formed at four locations that are equally spaced in the circumferential direction.

  A receiving portion 112 is formed between the caulking portions 110 and 110 adjacent in the circumferential direction. The receiving portion 112 is integrally formed in the opening portion on the upper side in the axial direction of the outer tubular metal fitting 96 between the circumferential directions of the caulking portion 110, and is bent and extended in the direction perpendicular to the axial direction. In particular, in the present embodiment, two receiving portions 112 and 112 are formed between the circumferential directions of the caulking portions 110 and 110 adjacent in the circumferential direction.

  Further, a notch 114 is formed between the circumferential direction of the caulking portion 110 and the receiving portion 112 adjacent to each other in the circumferential direction and between the adjacent receiving portion 112 and the receiving portion 112. This notch 114 is formed with a predetermined width dimension in the circumferential direction, and is cut from the upper end of the outer tube fitting 96 with a predetermined depth in the axial direction.

  A stopper abutting portion 116 that is bent outward in the direction perpendicular to the axis is integrally formed at the lower end portion of the outer cylindrical metal fitting 96. The stopper abutting portion 116 is opposed to the bottom wall portion of the bottom fitting 52 with a predetermined distance away from the bottom wall portion of the bottom fitting 52 in an assembled state of an outer cylinder fitting 96 described later.

  In addition, a buffer rubber 118 is formed on the stopper contact portion 116. The buffer rubber 118 is integrally formed with the support rubber elastic body 88 and is vulcanized and bonded to the lower surface of the stopper contact portion 116 at least at a part of the circumference. In the present embodiment, the buffer rubber 118 is formed at two locations facing each other in the radial direction on the circumference of the outer cylindrical metal fitting 96, and the stopper abutting portion 116 extends over substantially a quarter of the circumference in the circumferential direction. It is formed so as to continuously cover the lower surface of.

  The inner cylinder fitting 94 and the outer cylinder fitting 96 arranged on the same central axis are connected to each other by the support rubber elastic body 88 as described above. Further, the inner cylinder fitting 94 is fixed to the sleeve fitting 36, and the outer cylinder fitting 96 is fixed to the cylindrical housing 82.

  That is, the inner cylindrical metal fitting 94 having a cylindrical shape is fitted on the sleeve metal fitting 36, and the upper end portion of the inner cylindrical metal fitting 94 bent radially inward is formed on the outer peripheral surface of the sleeve metal fitting 36. By overlapping the stepped portion 44 from below in the axial direction, the flange portion 100 integrally formed at the lower end portion of the inner tubular fitting 94 is overlapped on the bottom wall portion of the bottom fitting 52 from above in the axial direction. The stepped portion 44 of the sleeve fitting 36 and the bottom wall portion of the bottom fitting 52 are sandwiched and fixed between the axial directions. Note that the outer peripheral portion of the flange portion 100 is brought into contact with the bottom wall portion of the bottom metal fitting 52, and the central portion is spaced apart in the axial direction above the bottom wall portion of the bottom metal fitting 52.

  Under such an installed state of the inner cylinder fitting 94, the seal rubber layer 102 fixed to the inner peripheral surface of the inner cylinder fitting 94 is brought into close contact with the sleeve fitting 36 and the bottom fitting 52, respectively. The sealing rubber layer 102 seals between the fitting surface with the bottom metal fitting 52. In particular, the seal rubber layer 102 is integrally formed with the seal protrusion 106 and the seal protrusion 108 as described above, and protrudes in the axially perpendicular direction inward and axially downward on the inner peripheral side of the inner tubular fitting 94. Yes. Then, by inserting the inner tube fitting 94 into the sleeve fitting 36, the seal protrusion 106 is brought into contact with the outer peripheral surface of the sleeve fitting 36, and the inner tube fitting 94 is connected to the stepped portion 44 of the sleeve fitting 36. The seal protrusion 108 is brought into contact with the bottom wall portion of the bottom metal piece 52 by being clamped and held between the axial directions of the bottom wall portion of the bottom metal piece 52. As a result, the inner tubular fitting 94 and the sleeve fitting 36 and the inner tubular fitting 94 and the bottom fitting 52 are advantageously sealed and brought into close contact with the seal protrusions 106 and 108.

  Further, the outer cylinder fitting 96 is caulked and fixed to the cylindrical housing 82. In other words, the receiving portion 112 of the outer tubular metal fitting 96 is brought into contact with the outward projecting portion 86 of the tubular housing 82 from below in the axial direction, and the caulking portion 110 of the outer tubular metal fitting 96 is disposed outward of the tubular housing 82. The protrusion 86 is overlaid from above in the axial direction. As a result, the outward projecting portion 86 of the cylindrical housing 82 is held between the caulking portion 110 and the receiving portion 112 of the outer cylindrical metal fitting 96, and the outer cylindrical metal fitting 96 is attached to the cylindrical housing 82. It is connected and fixed in the axial direction.

  Under such an assembled state of the outer cylinder fitting 96, the caulking portion 110 that is bent and extends inward in the radial direction formed at the upper end portion of the outer cylinder fitting 96 is an inner periphery of the caulking piece 62 of the lid fitting 54. The portion is separated from the portion by a predetermined distance in the axial direction. Further, the inner peripheral portion of the seal rubber 66 continuously extending over the entire circumference with a substantially constant T-shaped cross section is superimposed on the lower surface of the inner peripheral portion of the caulking piece 62, and the caulking portions 110 facing each other in the axial direction. It is disposed between the caulking pieces 62. When the outer cylinder fitting 96 is excessively displaced in the axial direction with respect to the inner cylinder fitting 94 fixedly assembled to the sleeve fitting 36 and the case fitting 50, the caulking portion 110 of the outer cylinder fitting 96 becomes the case fitting. The 50 caulking pieces 62 are brought into contact with each other through a seal rubber 66 in a buffering manner. As a result, a stopper mechanism is configured to limit the amount of axial displacement of the outer tube fitting 96 relative to the inner tube fitting 94 in the axial direction.

  Further, under such an assembled state of the outer cylinder fitting 96, the stopper contact portion 116 formed at the lower end of the outer cylinder fitting 96 has a predetermined distance in the axial direction with respect to the bottom wall portion of the bottom fitting 52. Opposite positions are spaced apart. When the outer cylinder fitting 96 is excessively displaced axially downward with respect to the inner cylinder fitting 94, the stopper abutting portion 116 of the outer cylinder fitting 96 is moved with respect to the bottom wall portion of the bottom fitting 52. It is configured to be brought into contact with a buffer via a buffer rubber 118. Thereby, the 2nd stopper mechanism which restrict | limits the relative displacement amount to the axial direction downward with respect to the inner cylinder metal fitting 94 of the outer cylinder metal fitting 96 is comprised.

  As described above, the inner cylinder fitting 94 is assembled to the sleeve fitting 36 and the outer cylinder fitting 96 is assembled to the cylindrical housing 82, so that the stator 16 and the movable element 20 are elastically connected by the support rubber elastic body 88. Has been.

  A leaf spring 90 is disposed above the yoke fitting 18. The leaf spring 90 is composed of a thin, substantially disk-shaped metal spring, and has a circular hole in the central portion in the radial direction. Further, the leaf spring 90 in the present embodiment is formed with a plurality of holes (not shown) extending in a spiral shape from the inner peripheral side to the outer peripheral side so as to penetrate in the thickness direction. It is regulated by a spiral hole. In addition, by forming the spiral hole in the leaf spring 90, spaces on both sides sandwiching the leaf spring 90 are communicated with each other.

  A central portion of the leaf spring 90 is fixed to the shaft fitting 34. That is, the central portion of the leaf spring 90 is sandwiched between the connecting portions of the upper rod fitting 38 and the lower rod fitting 40 constituting the shaft fitting 34, and a connecting bolt protruding from the upper rod fitting 38 is formed at the center of the leaf spring 90. The leaf spring 90 is fixed to the shaft fitting 34 by being inserted into the circular hole and screwed into a screw hole formed in the upper end surface of the lower rod fitting 40.

  Further, the outer peripheral edge portion of the leaf spring 90 is superimposed on the upper surface of the outer peripheral portion of the yoke fitting 18. Further, an annular spacer fitting 119 is superimposed on the outer peripheral edge of the leaf spring 90 from above in the axial direction, and an inward protruding portion 84 of the cylindrical housing 82 is superimposed on the spacer fitting 119 from above. Has been. As a result, the outer peripheral edge of the leaf spring 90 is fixedly assembled by being sandwiched between the yoke metal 18 and the axially opposed surfaces of the cylindrical housing 82 via the spacer metal fitting 119.

  In this manner, the inner peripheral edge of the metal leaf spring 90 is fixed to the shaft fitting 34 and the outer peripheral edge is fixed to the yoke fitting 18, so that the stator 16 and the mover 20 are elastically supported by the leaf spring 90. Connected. In the present embodiment, the stator 16 and the mover 20 are connected by the support rubber elastic body 88 in the lower part in the axial direction and are connected by the leaf spring 90 in the upper part in the axial direction. Relative displacement of the mover 20 with respect to the stator 16 is advantageously prevented by elastic support at two locations in the axial direction.

  Further, under the assembled state of the stator 16 and the mover 20, the coil 22 of the stator 16 is disposed between the yoke metal 18 of the mover 20 and the opposed surfaces in the direction perpendicular to the axis of the permanent magnet 80 (the inner peripheral surface of the permanent magnet 80 And between the opposing surfaces of the inner peripheral side wall surface of the housing concave groove 78). The coil 22 is disposed away from both the yoke fitting 18 and the permanent magnet 80.

  Further, in the active vibration damper 10 according to the present embodiment, the electromagnetic exciter 12 is housed and disposed in a sealed state with respect to the external space between the axial direction of the bottom fitting 52 and the lid fitting 54. A sealed air chamber 120 is formed. The sealed air chamber 120 is divided into two in the axial direction by the support rubber elastic body 88, and the first air chamber in which the electromagnetic vibrator 12 is disposed on one side in the axial direction across the support rubber elastic body 88. 122 is formed, and a second air chamber 124 is formed on the other side in the axial direction. The first air chamber 122 and the second air chamber 124 are provided between the outer tubular fitting 96 and the bottom fitting 52, between the seal rubber 66 and the tubular housing 82, and between the tubular housing 82 and the lid fitting 54. The air passages 126 are formed to communicate with each other through the air passages 126 including the gaps formed. In particular, in the present embodiment, the first air chamber 122 and the second air chamber 124 are also communicated with each other by the notch 114 formed in the outer cylinder fitting 96.

  In the active vibration damper 10 having the structure according to the present embodiment, when power is supplied to the coil 22 from the external power supply device 28, a force is generated by a current flowing in a magnetic field formed by the permanent magnet 80. To do. The generated force causes the mover 20 to be displaced relative to the stator 16 on one side in the axial direction. Further, since the direction of the generated force is determined according to the direction of the magnetic pole of the permanent magnet 80 and the direction of the current flowing through the coil 22, the coil 22 is energized in a state where the permanent magnet 80 is fixedly disposed. The mover 20 can be displaced to both sides in the axial direction by alternately changing the direction of the current to flow in the forward and reverse directions (the current supplied to the coil 22 is AC). Therefore, it is possible to obtain a target excitation force by feeding the alternating current controlled to the coil 22 according to the frequency of the vibration to be controlled, ON / OFF control of the feeding to the coil 22, or the like.

  Then, the movable element 20 integrally provided with the mass member is added in the axial direction by supplying a controlled alternating current or pulsating current to the coil 22 or controlling ON / OFF of the power supply to the coil 22. The vibration is displaced and the target generated force is generated. As a result, the target excitation force can be exerted on the vibration suppression target member, and the vibration of the vibration suppression target member can be reduced actively or in an offset manner.

  Here, in the active vibration damper 10 according to the present embodiment, the sleeve fitting 36 constituting the lower end portion of the support fitting 32 is formed in a cylindrical shape, and the inner space is utilized on the inner peripheral side by utilizing the central hole 42. Is formed. In addition, a slit 46 cut from the upper end surface is formed in the upper end portion of the sleeve metal fitting 36, and the space on the outer peripheral side of the sleeve metal fitting 36 and the inner space formed on the inner peripheral side are mutually connected through the slit 46. It is communicated. The power supply lead wire 26 having one end connected to the coil 22 is taken out to the central hole 42 through the slit 46 of the sleeve metal fitting 36, and the coil 22 sandwiching the support rubber elastic body 88 through the central hole 42. Is taken out to the opposite side, that is, to the outside of the case metal fitting 50, and the other end of the power supply lead wire 26 is connected to the external power supply device 28.

  More specifically, the cylindrical sleeve fitting 36 is fitted and fixed in the central hole of the elastic rubber body 88 in the shape of an annular plate, and the internal space ( A slit 46 for communicating the central hole 42) with the outer peripheral side is formed in the sleeve metal fitting 36, and the lead wire 26 for power feeding is inserted into the internal space from the outer peripheral side of the sleeve metal fitting 36 through the slit 46, thereby supporting the elastic rubber body. The power supply lead wire 26 can be taken out to the external space by utilizing the central hole 88. Thus, the power supply lead wire 26 can be taken out by skillfully utilizing the shape of the support rubber elastic body 88 without providing a special hole or the like for taking out the power supply lead wire 26 to the outside.

  The sealing member 48 fitted in the central hole 42 of the sleeve fitting 36 has a plurality of extraction holes 128 penetrating in accordance with the number of power supply lead wires 26, and the power supply leads 128 are passed through the extraction holes 128. The line 26 is taken out to the outside. Further, the extraction hole 128 is slightly smaller in diameter than the power supply lead wire 26, and when the power supply lead wire 26 is inserted through the extraction hole 128, the seal member 48 is brought into close contact with the surface of the power supply lead wire 26. As a result, the sealing performance is maintained.

  Further, in the present embodiment, the power supply lead wire 26 is taken out to the outside by using the central hole 42 of the sleeve fitting 36 fitted and fixed in the central hole of the support rubber elastic body 88. The lower end of the sleeve fitting 36 is exposed to the outside through a through hole 58 formed at the center of the bottom wall portion of the bottom fitting 52. Therefore, as in the prior art, it is difficult to align the insertion holes of the power supply lead wires 26 formed in a plurality of members, and to insert the power supply lead wires 26 through the aligned insertion holes. Without this, the power supply lead 26 can be easily disposed at a predetermined position.

  Furthermore, in the present embodiment, the support fitting 32 is constituted by combining a rod-shaped shaft fitting 34 and a cylindrical sleeve fitting 36, and the lower end portion in the axial direction of the support fitting 32 is constituted by the sleeve fitting 36. As a result, the power supply lead wire 26 can be taken out to the outside using the central hole 42 of the support fitting 32 (sleeve fitting 36) at the lower end in the axial direction of the support fitting 32. Thereby, it is possible to realize the support metal fitting 32 having the central hole 42 for easily taking out the power supply lead wire 26 to the external space while avoiding an increase in diameter at a portion where the mover 20 is extrapolated. It is said that. Therefore, the active vibration damper 10 in which the power supply lead wire 26 can be easily taken out can be realized in a compact manner.

  Particularly in the present embodiment, since the power supply lead wire 26 is inserted into the slit 46 formed at the upper end of the sleeve metal fitting 36, the power supply lead wire 26 is attached before the sleeve metal fitting 36 is assembled to the shaft metal fitting 34. Is inserted into the slit 46 from the upper end side of the sleeve metal fitting 36, whereby the power supply lead wire 26 arranged so as to penetrate the peripheral wall portion of the sleeve metal fitting 36 can be arranged by a simple operation. In addition, since the power supply lead wire 26 is inserted into the slit 46 formed at a predetermined depth in the axial direction, the power supply lead wire 26 and the sleeve fitting 36 can be relatively displaced in the vertical direction. I can do it. Therefore, disconnection of the power supply lead 26 can be advantageously avoided, and durability can be improved.

  In the active vibration damping device according to the present embodiment, the first air chamber 122 and the second air chamber 124 formed on both sides of the support rubber elastic body 88 include the air passage 126 and the notch 114. Are in communication with each other. As a result, even when a pressure difference occurs between the first air chamber 122 and the second air chamber 124, the pressure difference is quickly eliminated by the flow of air through the air passage 126 and the notch 114. ing. Therefore, even when there is a relative pressure difference between the first air chamber 122 and the second air chamber 124, the deformation of the support rubber elastic body 88 due to the pressure difference is prevented, and the stator 16 and the mover are prevented. 20 can be positioned with high accuracy. Accordingly, the generated force in the electromagnetic vibrator 12 can be stably obtained, and the intended vibration damping effect can be effectively exhibited. In addition, it is possible to reduce or avoid the action of the air spring when the movable element 20 is driven to vibrate, and to obtain the desired vibration damping effect with higher accuracy.

  As mentioned above, although one Embodiment of this invention was described, this is an illustration to the last, Comprising: This invention is not interpreted restrictively at all by the specific description in this Embodiment. In the following description, members or parts that are substantially the same as those of the above-described embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted.

  For example, in the above-described embodiment, the upper end portion of the sleeve metal fitting 36 is fitted and fixed to the lower end portion of the shaft metal fitting 34, and the sleeve metal fitting 36 extends downward from the lower end portion of the shaft metal fitting 34 in the axial direction. However, the sleeve fitting 36 does not necessarily have to be assembled so as to protrude from the shaft fitting 34 in the axial direction.

  Specifically, for example, as shown in FIG. 7, the shaft fitting 130 may be inserted through the sleeve fitting 36. More specifically, a notch 132 extending at a predetermined length from the lower end in the axial direction is formed at the lower end in the axial direction of the shaft fitting 130, and the notch 132 is formed in the sleeve fitting 36. The slit 46 is aligned in the circumferential direction. The notch 132 is formed so as to extend upward from the lower end in the axial direction of the slit 46 under the assembled state of the shaft fitting 130 and the sleeve fitting 36, and is for power feeding inserted through the central hole 42 through the slit 46. The lead wire 26 is taken out from the lower end opening of the sleeve fitting 36 to the external space through the notch 132. Even with such a structure, it is possible to realize simple extraction of the power supply lead wire 26 as in the above embodiment.

  Further, the power supply lead 26 does not necessarily have to be taken out from the lower end opening of the sleeve fitting 36. Specifically, for example, as shown in FIG. 8, a slit 46 for inserting the power supply lead wire 26 into the central hole 42 is formed at the upper end portion of the peripheral wall of the sleeve fitting 134, and the sleeve fitting 36 is formed. A second slit 136 is formed at the lower end of the peripheral wall from the central hole 42 on the outer peripheral side so that the power supply lead wire 26 is taken out, so that the power supply lead wire 26 is taken out from the second slit 136. It may be.

  More specifically, a mounting bracket 138 fixed to the vibration suppression target member is fitted and fixed to the lower end opening of the sleeve fitting 134, and the lower end opening of the sleeve fitting 134 is closed by the attachment fitting 138. Yes. A slit 46 is formed at the upper end of the sleeve fitting 134, and a second slit 136 is formed at the lower end of the sleeve fitting 134. The second slit 136 is formed at the lower end of the peripheral wall of the sleeve fitting 134, and is formed with a predetermined length from the lower end in the axial direction upward in the axial direction. The second slit 136 is aligned with the slit 46 in the circumferential direction, and is formed at a predetermined distance from the slit 46 in the axial direction. Then, as shown in FIG. 8, the power supply lead wire 26 connected to the coil (not shown) is inserted into the central hole 42 of the sleeve fitting 134 through the slit 46, and the support rubber elastic body with respect to the coil. It is taken out to the outside through a second slit 136 formed on the opposite side across 88 and is connected to an external power supply device (not shown). Also by adopting such a structure, the feeding lead wire 26 can be easily taken out to the opposite side of the coil across the support rubber elastic body 88 as in the above-described embodiment. The second slit 136 does not need to be aligned with the slit 46 in the circumferential direction, and may be formed at a position different from the slit 46 in the circumferential direction. In addition, when the slit 46 and the second slit 136 are formed at different positions in the circumferential direction, the upper end of the second slit 136 is positioned above the lower end of the slit 46. May be.

  In the above embodiment, both end portions in the axial direction of the support fitting 32 are fixedly supported by the member to be damped through the case fitting 50, but both ends of the support fitting 32 are not necessarily supported. There is no need. Specifically, for example, a structure like the active vibration damper 140 shown in FIG. 9 can be adopted. That is, in the active vibration damper 140, the mounting bracket 142 fixed to the vibration suppression target member is fixed to the lower end portion of the sleeve metal fitting 36, and the sleeve metal fitting 36 is subject to vibration suppression via the mounting metal fitting 142. The shaft fitting 144 fixed to the member and press-fitted and fixed to the upper end of the sleeve fitting 36 is below the upper end of the yoke fitting 146 having a substantially circular block shape with a predetermined distance in the axial direction. Are separated from each other. In short, in the active vibration damper 140, only the lower end portion in the axial direction of the support bracket 32 is supported by the vibration damping target member. In the active vibration damper 140 shown in FIG. 9, the outer cylinder fitting 96 and the cylindrical housing 82 are integrally configured by a stepped cylindrical housing fitting 147.

  Moreover, in the said embodiment, although the attachment member is comprised by the attachment leg part 68 provided in the peripheral wall part of the bottom metal fitting 52 and the bottom metal fitting 52, an attachment member is based on the specific description of the said embodiment. It is not limited at all. Specifically, for example, as shown in FIG. 8, a disk-shaped mounting bracket 138 having a protrusion that is press-fitted into the lower end opening of the sleeve bracket 134, as shown in FIG. In addition, a mounting member 142 having a substantially cylindrical shape that is fitted and fixed to the sleeve member 36 and having a flange-like mounting leg portion 148 that extends outward in the direction perpendicular to the shaft at the lower end in the axial direction may be employed. It is also possible to constitute the mounting member by the sleeve metal fitting itself. For example, the lower end portion of the sleeve metal fitting is directly fixed to the member to be damped by means such as welding, bolt fixing, or press fitting. Also good. When the mounting member is constituted by the sleeve metal fitting, for example, it is possible to advantageously realize fixing to the vibration suppression target member by integrally forming a flange-like mounting leg portion at the lower end portion of the sleeve metal fitting. I can do it.

  Further, the cutout hole does not necessarily have to be a slit shape like the slit 46 in the above-described embodiment. Specifically, for example, a semicircular groove shape that opens in the upper end surface of the sleeve fitting 36 and extends in the radial direction may be used.

  In the above embodiment, an example in which the power supply lead wire 26 is directly taken out to the outside and connected to the external power supply device 28 is shown. However, for example, in the opening on the opposite side to the shaft fitting 34 of the sleeve fitting 36. The connector portion is formed of a hard synthetic resin into which a metal terminal is inserted, the connector portion is exposed to the outside from the central hole 42 of the sleeve metal fitting 36, and the metal terminal of the connector portion is connected to the coil 22 The power supply lead wire 26 connected to the coil 22 may be indirectly taken out by connecting the power supply lead wire 26 and the power cord connected to the external power supply device 28. According to this, the sealed air chamber 120 isolated from the external space can be formed without providing the seal member 48, and the durability of the electromagnetic vibrator 12 can be improved. It is possible to more stably and easily realize the extraction to the outside.

  In addition, although not enumerated one by one, the present invention can be carried out in a mode to which various changes, modifications, improvements and the like are added based on the knowledge of those skilled in the art. It goes without saying that all are included in the scope of the present invention without departing from the spirit of the present invention.

It is a longitudinal cross-sectional view which shows the active vibration damper as one Embodiment of this invention, Comprising: The II sectional view taken on the line in FIG. II-II sectional view taken on the line in FIG. The top view which shows the sleeve metal fitting of the active vibration damper shown in FIG. It is a longitudinal cross-sectional view which shows the sleeve metal fitting, Comprising: The IV-IV sectional view taken on the line in FIG. The longitudinal cross-sectional view which shows the integral vulcanization molded product of the support rubber elastic body of the active vibration damper shown in FIG. The top view which shows the outer cylinder metal fitting of the same body vulcanization molded product. Explanatory drawing which shows another one Embodiment of this invention. Explanatory drawing which shows another one Embodiment of this invention. The longitudinal cross-sectional view which shows another one Embodiment of this invention.

Explanation of symbols

10: Active vibration damper, 12: Electromagnetic actuator, 14: Coil member, 18: Yoke fitting, 26: Lead wire for power feeding, 34: Shaft fitting, 36: Sleeve fitting, 42: Center hole, 46: Slit, 48: seal member, 52: bottom metal fitting, 54: lid metal fitting, 68: mounting leg, 74: bolt hole, 76: insertion hole, 82: leaf spring, 92: elastic rubber body for support, 94: inner cylindrical metal fitting, 102 : Seal rubber layer, 120: Sealed air chamber

Claims (7)

An electromagnetic actuator is provided, wherein the coil member and the yoke member are disposed so as to be relatively displaceable, and an excitation force is generated between the coil member and the yoke member by energization of the coil member. Is attached to the vibration suppression target member, and the active vibration damper in which the yoke member is elastically supported with respect to the vibration suppression target member.
An inner shaft member extending in the relative displacement direction of the coil member and the yoke member is provided, and the coil member is fixedly supported by the inner shaft member, and a cylindrical shape is formed at one axial end of the inner shaft member. The sleeve member is externally fitted and fixed, and the sleeve member elastically supports the yoke member via the elastic member, while forming an internal space on the inner peripheral side of the sleeve member, and the sleeve member A notch hole for communicating the inner space with the outer peripheral surface is formed at an end portion on the connection side with the inner shaft member, and a power supply lead wire to the coil member is inserted into the inner space of the sleeve member from the notch hole. Thus, the active vibration damper is taken out on the opposite side of the coil member with the elastic member interposed therebetween.   The active vibration damper according to claim 1, wherein the sleeve member is fixedly provided with an attachment member having an attachment portion for the vibration suppression target member.   The mounting member is configured by fixing a base member that is located on the outer side in the axial direction of the elastic member and extends from the sleeve member toward the outer peripheral side, and the coil member and the yoke member are A cover member having a bottomed cylindrical shape is assembled so as to cover the inner shaft member from the axial direction opposite to the fixed side of the sleeve member, and the opening of the cover member is covered with the base member. 3. The active vibration damper according to claim 2, wherein a sealed air chamber is formed in cooperation with the base member and the cover member so as to be isolated from the electromagnetic actuator.   An insertion hole penetrating in the axial direction is formed in the yoke member, and the inner shaft member is inserted through the insertion hole, and the inner shaft is inserted into the insertion side end of the inner shaft member. The active vibration damper according to any one of claims 1 to 3, further comprising a second elastic member that elastically connects the member to the yoke member.   The elastic member for connecting the yoke member to the sleeve member is made of a rubber elastic body, while the second elastic member for connecting the yoke member to the inner shaft member is made of a metal leaf spring. The active vibration damper according to claim 4.   The elastic member that connects the yoke member to the sleeve member is formed of a rubber elastic body having an annular plate shape, and the fitting cylinder fitting is fixed to the inner peripheral surface of the rubber elastic body. While being externally fixed to the sleeve member, a seal rubber layer is formed on the inner peripheral surface of the fitting tube fitting, and the gap between the fitting surfaces of the fitting tube fitting and the sleeve member is sealed with the seal rubber layer. The active vibration damper according to any one of claims 1 to 5.   The sleeve member is opened at the end in the axial direction opposite to the outer fitting fixing side with respect to the inner shaft member, and the lead wire for power feeding is taken out to the external space through the opening in the end in the axial direction. The active vibration damper according to any one of claims 1 to 6, wherein a seal member is attached to the opening at the axial end.

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