JP2008064272A - Caulking connection structure for vibration isolator and vibration isolating connection body and damper using the caulking connection structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a caulking connection structure for a vibration isolator having a new structure capable of achieving axial positioning of a cylindrical mounting metal fitting and a separate metal fitting and connection and fixation by caulking while reducing the number of components, of advantageously securing the free length of a fixed rubber elastic body and of avoiding increase in the diameter of a connecting portion, and a vibration isolating connection body and a damper using the caulking connection structure for the vibration isolator. <P>SOLUTION: A flange-shaped connection part 88 is provided in a cylindrical opening part of the separate metal fitting 84, and in a connection side opening part of the cylindrical mounting metal fitting 96, a plurality of receiving parts 110 abutting on the axial outer face of the connection part 88 and a plurality of caulking parts 112 rounding the connection part 88 from the outer peripheral side, and overlapped with the axial inner face of the connection part 88 are formed in different portions on the periphery. By the receiving parts 110 and caulking parts 112, the connection side opening part of the cylindrical mounting metal fitting 96 is caulked and fixed to the connection part 88 of the cylindrical opening part of the separate metal fitting 84. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a caulking connection structure in which a cylindrical mounting bracket bonded to an outer peripheral surface of rubber and a separate metal fitting having a cylindrical opening are connected and fixed by caulking, and an engine mount using the caulking connection structure The present invention relates to an anti-vibration coupling body and a vibration damper.

  Conventionally, a cylindrical mounting bracket provided with a cylindrical connecting opening and a separate mounting bracket provided with a cylindrical cylindrical opening and separated from the cylindrical mounting bracket are overlapped in the axial direction. A caulking connection structure in which the openings are connected and fixed by caulking and fixing is known. For example, in patent document 1 (Unexamined-Japanese-Patent No. 2004-44680), the case as a cylindrical attachment metal fitting and the outer cylinder metal fitting as a separate metal fitting are mutually crimped and connected. That is, an upper flange portion serving as a connecting portion extending outward in a direction perpendicular to the axial direction is provided in the cylindrical opening at the axial end portion of the outer cylindrical metal fitting, and a lower end portion and a receiving portion as a caulking portion are provided at the axial end portion of the case. The outer metal fitting is provided. Then, the upper flange portion of the outer cylinder fitting is brought into contact with the outer fitting fixed to the case in the axial direction to position the outer cylinder fitting and the case in the axial direction, and from the opposite side to the outer fitting inward in the direction perpendicular to the axis. The outer cylindrical bracket is attached by overlapping the lower end of the bent case with the upper flange in the axial direction and sandwiching the upper flange between the outer flange and the axially opposing surface of the lower end of the case. It is connected and fixed to the case.

  By the way, in patent document 1, the receiving part and the caulking piece which comprise a caulking part are comprised by the member from which it differs. In other words, the receiving part is constituted by an outer metal part that is separated from the case, and the caulking piece is constituted by the lower end part of the case. When the receiving part and the caulking piece are made of different members as described above, an increase in the number of parts may be a problem.

  Further, for example, in Patent Document 2 (Japanese Patent Laid-Open No. 10-227328), a caulking connection structure using a cylindrical mounting bracket that is fixed to an outer peripheral portion of a rubber elastic body and integrally includes a receiving portion and a caulking portion. The body is shown. That is, the outer cylinder as the cylindrical mounting bracket is integrally provided with a receiving portion that extends outward in the direction perpendicular to the axis and a crimping portion that is a caulking portion extending downward in the axial direction from the outer peripheral edge of the receiving portion. Then, the receiving part is brought into contact with the outer peripheral flange part as the connecting part from the upper side in the axial direction, and the caulking part is overlapped with the outer peripheral flange part from the lower side in the axial direction, so that the outer cylinder becomes a separate metal fitting. It is connected and fixed to the cup member.

  However, in such a cylindrical mounting bracket shown in Patent Document 2, since the caulking portion is formed on the outer peripheral edge portion of the receiving portion extending outward in the direction perpendicular to the axis, the connection between the cylindrical mounting bracket and the separate bracket is performed. Increasing the diameter tends to be a problem in the part. Further, as shown in Patent Document 2, when the cylindrical mounting bracket is fixed to the outer peripheral portion of the rubber elastic body, the diameter of the rubber elastic body may be increased in order to avoid an increase in the diameter of the connecting portion. It may be difficult to sufficiently secure the free length in the direction, which may cause problems such as a low degree of freedom in tuning the spring characteristics.

JP 2004-44680 A JP-A-10-227328

  Here, the present invention has been made in the background as described above, and the problem to be solved is the axial positioning of the cylindrical mounting bracket and the separate mounting bracket and the connection and fixing by caulking. For a vibration isolator with a novel structure that can be realized with a small number of parts and that avoids an increase in the diameter of the connecting part while advantageously ensuring the free length of the rubber elastic body fixed to the inner periphery. An object of the present invention is to provide a caulking connection structure, and a vibration-proof connection body and a vibration damper using the structure.

  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 present invention relates to a cylindrical mounting bracket that is vulcanized and bonded to the outer peripheral surface of a rubber elastic body, and is provided in a separate mounting bracket that constitutes a vibration isolator together with the rubber elastic body and the cylindrical mounting bracket These cylindrical mounting brackets are overlapped in the axial direction with respect to the opening, and one connecting side opening in the axial direction of the cylindrical mounting bracket is caulked and fixed to the cylindrical opening of the separate bracket. A caulking connection structure for a vibration isolator in which a separate metal fitting is connected and fixed, wherein a flange-like connection portion is provided in the cylindrical opening of the separate metal fitting, and the connection side of the cylindrical attachment metal fitting The opening includes a receiving portion that is brought into contact with the outer side surface in the axial direction of the connecting portion, and a caulking portion that wraps around the connecting portion from the outer peripheral side and overlaps the inner side surface in the axial direction of the connecting portion. A plurality of parts are formed at different locations on the circumference, and the receiving part and the caulking part Characterized by being caulked and fixed to the connecting-end opening of the cylindrical mounting member relative to the tubular opening the connecting portion of the said further body fitting.

  In the caulking connection structure having such a structure according to the present invention, a receiving portion and a caulking portion are formed with respect to one of the connecting side openings in the axial direction of the cylindrical mounting bracket, and the receiving portion and the caulking portion By fixing and holding the connecting portion provided in the cylindrical opening of the separate bracket, the connecting opening of the cylindrical mounting bracket is caulked and fixed to the cylindrical opening of the separate bracket. . According to this, positioning in the axial direction of the cylindrical mounting bracket and the separate bracket, and connecting and fixing the cylindrical mounting bracket and the separate bracket can be easily realized with a small number of parts.

  Furthermore, the diameter of the cylindrical mounting bracket is reduced at the connecting portion between the cylindrical mounting bracket and the separate bracket by providing the receiving portion and the caulking portion that hold the connecting portion in a fixed manner at multiple locations on the circumference. Or can be avoided. Therefore, by adopting the caulking connection structure according to the present invention, a compact vibration isolator can be advantageously realized. Moreover, since the inner diameter of the cylindrical mounting bracket can be advantageously ensured, the free length in the radial direction of the rubber elastic body fixed to the cylindrical mounting bracket is ensured, and the spring characteristics of the rubber elastic body are improved. It is possible to improve the degree of freedom in tuning and the degree of freedom in designing the rubber elastic body.

  Further, in the caulking connection structure according to the present invention, a receiving piece that bends and extends toward the inner peripheral side is provided in the connection side opening of the cylindrical mounting bracket, and the receiving portion is configured by the receiving piece. Is desirable. According to this, the contact part of the receiving part with respect to the connection part can be advantageously ensured by configuring the receiving part with the receiving piece that bends and extends toward the inner peripheral side. Therefore, the positioning of the cylindrical mounting bracket and the separate bracket in the axial direction can be realized more stably.

  Further, in the caulking connection structure according to the present invention, the caulking connection structure of the cylindrical mounting bracket is bent and extended toward the inner peripheral side at a position protruding outward in the axial direction from the receiving piece. It is desirable that a piece is provided, the caulking piece constitutes the caulking portion, and the connecting portion of the separate metal fitting is caulked and fixed between the receiving piece and the caulking piece in the axial direction.

  According to this, by sandwiching the connecting portion between the receiving piece and the caulking piece and fixing in the axial direction, it is possible to ensure a large contact area between the receiving portion and the caulking portion and the connecting portion, and more Stable caulking can be achieved.

  Furthermore, in the caulking connection structure according to the present invention, the receiving piece and the caulking piece are formed at a predetermined distance in the circumferential direction in the cylindrical mounting bracket, and the adjoining receiving piece and the caulking piece are adjacent to each other. It is desirable to form a notch extending between the pieces with a predetermined width in the axial direction from the axial end of the cylindrical mounting bracket. According to this, it is possible to prevent wrinkles and cracks between the receiving piece and the caulking piece when the cylindrical mounting bracket is processed.

  Moreover, in the caulking connection structure according to the present invention, it is desirable that an inner diameter dimension of the connection-side opening of the cylindrical mounting bracket is larger than an outer diameter dimension of the cylindrical opening of the separate bracket. According to this, the free length in the radial direction of the rubber elastic body can be advantageously ensured, and the degree of freedom in tuning and design freedom of the rubber elastic body can be improved.

  In the caulking connection structure according to the present invention, it is preferable that a fixing member fixed to the vibration isolation target member is fixed to the central portion of the rubber elastic body. Thereby, the caulking connection structure can be elastically connected to the vibration isolation target member.

  Further, in the caulking connection structure according to the present invention, more preferably, a stopper portion that is spaced apart and opposed to the caulking portion in the axial direction is fixed to the fixing member. An axial stopper mechanism is configured by forming a buffer rubber layer on at least one of the facing surfaces of the caulking portion and the stopper portion.

  According to this, the stopper mechanism that limits the relative displacement amount in the axial direction of the caulking connection structure with respect to the vibration isolation target member by using the caulking portion is configured, and the caulking connection structure is excessive with respect to the vibration isolation target member. Such relative displacement can prevent the rubber elastic body from being cracked and the like, thereby reducing the durability.

  Furthermore, in the caulking connection structure according to the present invention, more preferably, a stopper abutting portion whose diameter is increased at the other axial opening of the cylindrical mounting bracket is formed, and the cylindrical A second stopper portion that is opposed to the other axial opening of the mounting bracket in the axial direction is fixedly provided with respect to the fixing member. A second buffer rubber layer is formed on at least one of the opposing surfaces of the stopper portion to constitute a second stopper mechanism in the axial direction.

  According to this, the relative displacement amount in the axial direction of the caulking connection structure with respect to the vibration isolation target member is limited by the second stopper portion. Therefore, it is possible to prevent the rubber elastic body from cracking due to the excessive displacement of the caulking connection structure connected to the vibration isolation target member by the rubber elastic body. Can be improved.

  Further, the vibration isolating body such as an engine mount according to the present invention employs a caulking coupling structure for a vibration isolating apparatus having a structure according to the present invention as described above, and the vibration isolating object to which the fixing member is fixed. A fixing portion for fixing the caulking connection structure to the second vibration isolation target member that is vibration-proof connected to the member is provided in the separate metal fitting.

  In such an anti-vibration coupling body having a structure according to the present invention, the caulking coupling structure having a structure according to the present invention can be used to form a compact structure with a small number of parts. In addition, since the rubber elastic body has a high degree of freedom in tuning and design, the vibration isolation characteristics can be set with a high degree of freedom in accordance with the vibration isolation target vibration.

  The vibration damper according to the present invention employs a caulking connection structure for a vibration isolator having a structure according to the present invention as described above, and a mass member is integrally provided in the separate metal fitting, and the mass The member is configured to be elastically supported by the rubber elastic body with respect to the fixing member.

  Such a vibration damper having a structure according to the present invention can be compactly configured with a small number of parts by employing a caulking connection structure having a structure according to the present invention. In addition, since the rubber elastic body has a high degree of freedom in tuning and design, the vibration isolation characteristics can be set with a high degree of freedom in accordance with the vibration to be controlled.

  In the vibration damper according to the present invention, it is desirable that an actuator that exerts an excitation force is provided between the mass member and the fixed member to exhibit an active vibration damping effect. According to this, a more excellent damping effect can be applied to the vibration to be controlled.

  Furthermore, the vibration damper according to the present invention includes a mover that is assembled so as to be axially displaceable with respect to the stator. The coil member is assembled to the stator or the mover, and the coil member A magnetic path is formed by assembling a yoke member around the magnet, and the mover is displaced relative to the stator in the axial direction by the action of a magnetic field generated by energizing the coil member. It is desirable to employ a type actuator as the actuator and to provide the mass member fixedly on the movable element and to fix the stator fixedly on the fixed member. According to this, it is possible to exhibit a further excellent vibration damping effect by the highly accurate excitation performance of the electromagnetic actuator.

  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 a first 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 vibration isolation 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 and a sleeve fitting 36 as a fixing 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.

  Furthermore, the sleeve metal fitting 36 is formed with a slit 46 that opens to 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 portion of the sleeve metal fitting 36 is formed so that the lower portion in the axial direction extends below the lower end of the shaft metal fitting 34 under the assembled state to the shaft metal fitting 34. In a part of the peripheral wall of the sleeve metal fitting 36, a 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 and a cover metal fitting 54 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. In addition, a fixed fitting 62 that extends outward in the direction perpendicular to the axis is formed integrally with the peripheral edge of the opening 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.

  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 fixing metal 62 of the cover metal 54 are overlapped in the axial direction, thereby causing the bottom metal 52 to overlap. 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 at the tip of the fixing fitting 62 of the lid fitting 54, so that the bottom fitting 52 and the lid fitting 54 are assembled to each other. It has been.

  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. Further, the lower end opening of the sleeve fitting 36 is exposed to the outside through the through hole 58 of the bottom fitting 52 when the support fitting 32 is attached to the case fitting 50.

  Further, the power supply lead wire 26 is inserted into the central hole 42 of the sleeve metal fitting 36 through the slit 46 formed in the sleeve metal fitting 36, and the power supply lead wire 26 extends from the lower end opening of the central hole 42 to the outside of the case metal fitting 50. And connected to the external power supply 28. A plurality of extraction holes 66 are formed through the seal member 48 fitted in the central hole 42 of the sleeve metal fitting 36 in accordance with the number of power supply lead wires 26, and the power supply leads are passed through the extraction holes 66. The line 26 is taken out to the outside. Further, the extraction hole 66 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 66, 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, a substantially annular seal rubber 68 is disposed between the overlapping surfaces of the fixing flange 56 and the fixing metal 62 in the case metal 50. The seal rubber 68 continuously extends in the circumferential direction with a substantially constant T-shaped cross section, and the upper end surface of the seal rubber 68 is overlapped with the fixing bracket 62 of the lid fitting 54 from the lower side in the axial direction. 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 68 in the present embodiment, seal ridges that protrude outward in the axial direction and continuously extend in the circumferential direction with a substantially constant semicircular cross section are integrally formed on both surfaces. The seal ridge is compressed and deformed by abutting against the fixing flange 56 and the fixing bracket 62, respectively, in the assembled state of the bottom fitting 52 and the lid fitting 54. As a result, the fixing flange 56 and the fixing fitting 62, and the overlapping surfaces of the bottom fitting 52 and the lid fitting 54 are sealed in a sealed state by the sealing rubber 68, and the opening of the lid fitting 54 is covered with the bottom fitting 52. Has been.

  Also, the bottom metal fitting 52 is fixedly provided with mounting leg portions 70 at a plurality of locations on the circumference. The mounting leg portion 70 has a substantially curved plate shape and is fixed to the outer peripheral surface of the bottom metal fitting 52 by means such as welding, and is bent outward from the lower end portion of the fixing portion 72 in the direction perpendicular to the axis. A mounting plate portion 74 is integrally formed. A bolt hole 76 is formed in the mounting plate portion 74 so as to penetrate the center portion, and is fixed to the vibration isolation target member by a mounting bolt (not shown) through which the bolt hole 76 is inserted. Thereby, the active vibration damper 10 according to the present embodiment is fixedly attached to a vibration isolation 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 bottom metal member 52 and the mounting leg portion 70 constitute a mounting member that is fixed to the vibration isolation target member. In addition, the support fitting 32 constituted by the shaft fitting 34 and the sleeve fitting 36 is fixed to the mounting leg portion 70 through 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 78 penetrating in the axial direction is formed at the radial center. Further, the insertion hole 78 formed in the yoke metal 18 is a circular hole having a large diameter as compared with the outer diameter of the shaft metal 34, and the shaft metal 34 is free from the insertion hole 78 of the yoke metal 18. It is inserted and arranged on the same central axis.

  An accommodation concave groove 80 is formed at a substantially central portion in the thickness direction of the yoke fitting 18. The housing groove 80 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 82 is disposed in the housing concave groove 80 formed in the yoke fitting 18. The permanent magnet 82 has a substantially cylindrical shape, and the outer peripheral surface thereof is overlapped and fixed to the side wall surface on the outer peripheral side of the housing concave groove 80. Moreover, the inner peripheral surface of the permanent magnet 82 and the side wall surface on the inner peripheral side of the housing groove 80 are opposed to each other with a predetermined distance in the direction perpendicular to the axis over the entire periphery. Further, the permanent magnet 82 has a magnetic pole formed in a direction perpendicular to the axis, and when the permanent magnet 82 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 a cylindrical housing 84 as a separate fitting. The cylindrical housing 84 has a substantially cylindrical shape and is externally fixed to the yoke fitting 18. An inward projecting portion 86 is formed at the upper end opening of the cylindrical housing 84, and an outward projecting portion 88 as a connecting portion is formed at the axial lower end opening of the cylindrical housing 84. . The inward projecting portion 86 has an inner flange shape that extends inward in the direction perpendicular to the axis from the upper end edge of the cylindrical housing 84, and is formed continuously over the entire circumference. Further, the outward projecting portion 88 has a flange shape extending outward from the lower end edge of the cylindrical housing 84 in the direction perpendicular to the axis, and is continuously formed over the entire circumference. In the present embodiment, the inner projecting portion 86 and the outer projecting portion 88 are formed by bending the axial end portion of the cylindrical housing 84 and are integrally formed with the cylindrical housing 84. Moreover, the cylindrical opening part in this embodiment is comprised by the lower end opening part of the cylindrical housing 84. FIG.

  In addition, the needle | mover 20 in this embodiment is comprised including the yoke metal fitting 18, the permanent magnet 82, the cylindrical housing 84, 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 82, and the mover 20 having a predetermined mass is vibrated to achieve the purpose. Generating power to be obtained.

  The stator 16 and the mover 20 are elastically connected by a support rubber elastic body 90 as a rubber elastic body and a leaf spring 92. As shown in FIG. 5, the support rubber elastic body 90 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 fixed to the sleeve fitting 36 is vulcanized and bonded to the inner peripheral edge of the support rubber elastic body 90. Further, an outer cylindrical metal fitting 96 as a cylindrical attachment fitting fixed to the yoke fitting 18 via the cylindrical housing 84 is vulcanized and bonded to the outer peripheral surface of the support rubber elastic body 90. 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 90 has a concave shape that is inclined downward toward the central side 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 90 through a plurality of through holes 104 formed in the peripheral wall portion of the inner cylindrical metal 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).

  The inner cylinder fitting 94 having such a structure is fitted on the sleeve fitting 36, and the upper end portion of the inner cylinder fitting 94 bent radially inward is formed on the outer peripheral surface of the sleeve 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.

  Further, under the mounted 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 space between the bottom metal fitting 52 and the fitting surface is sealed by the seal rubber layer 102. 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.

  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. In the present embodiment, the inner diameter dimension at the upper end opening of the outer cylindrical metal fitting 96 is made larger than the outer diameter dimension at the lower end opening of the cylindrical housing 84. In addition, the connection side opening part in this embodiment is comprised by the upper-end opening part of the outer cylinder metal fitting 96. FIG.

  In addition, a receiving piece 110 and a caulking piece 112 are integrally formed in the opening at the upper end in the axial direction of the outer cylindrical metal fitting 96. As shown in FIGS. 6 and 7, the receiving piece 110 has a plate shape extending a predetermined length in the circumferential direction, and extends radially inward from the upper end opening of the outer cylinder fitting 96. It is formed to take out. In addition, the receiving pieces 110 are formed at a plurality of locations on the circumference at the upper end opening in the axial direction of the outer cylinder fitting 96.

  In addition, a caulking piece 112 is integrally provided in the opening at the upper end in the axial direction of the outer cylindrical metal fitting 96. As shown in FIG. 7, the caulking piece 112 is formed at a different location on the circumference from the receiving piece 110 in the axial upper end opening of the outer cylindrical metal fitting 96, and is bent inward in the radial direction. It extends to. Further, the caulking piece 112 is positioned above the receiving piece 110 in the axial direction. As is clear from this, the upper end portion of the outer tubular fitting 96 extends upward at the location where the caulking piece 112 is formed, and the axial dimension of the outer tubular fitting 96 at the location where the caulking piece 112 is formed is the receiving piece. It is made larger than the axial dimension of the outer cylinder fitting 96 at the location where 110 is formed. In the present embodiment, the caulking pieces 112 are formed at four locations that are equally spaced in the circumferential direction, and notches 114 described later are provided between the circumferential directions of the caulking pieces 112 and 112 that are adjacent on the circumference. Two receiving pieces 110, 110 are formed with a predetermined distance therebetween in the circumferential direction. Adjacent receiving pieces 110 and caulking pieces 112 are arranged at a predetermined distance in the circumferential direction.

  Further, a notch 114 is formed between the circumferentially adjacent receiving piece 110 and the caulking piece 112 and between the adjacent receiving piece 110 and the receiving piece 110 in the circumferential direction. The notch 114 is formed with a predetermined width dimension in the circumferential direction, and is cut with a predetermined depth dimension in the axial direction from the upper end of the outer cylinder fitting 96.

  The outer cylinder fitting 96 provided with the receiving piece 110 and the caulking piece 112 integrally at a plurality of locations on the circumference is advantageously formed by means such as pressing a metal plate. That is, in the present embodiment, the metal plate is pressed to be processed into a substantially bottomed cylindrical shape in the reverse direction, and the upper bottom wall portion is in accordance with the shape of the peripheral wall portion of the outer cylinder fitting 96 and the receiving piece 110 and the caulking piece 112. The peripheral wall portion of the outer cylindrical metal fitting 96 at the formation portion of the caulking piece 112 which is cut out into a predetermined shape and extends inward in the radial direction is extended so as to extend upward in the axial direction. By forming the caulking piece 112 by bending the protruding tip portion inward in the radial direction, the outer cylinder fitting 96 having the receiving piece 110 and the caulking piece 112 having the above-described structure integrally provided in the opening in the axial direction upper side. Is formed. It is also possible to cut the axial ends of the metal material having a cylindrical shape in accordance with the shapes of the receiving piece 110 and the caulking piece 112 and bend the receiving piece 110 and the caulking piece 112 inward in the direction perpendicular to the axis. An outer cylinder fitting 96 can be obtained.

  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 as a stopper rubber is formed on the stopper contact portion 116. The buffer rubber 118 is integrally formed with the support rubber elastic body 90 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 four locations on the circumference of the outer cylindrical metal fitting 96, and each of the stopper abutting portions 116 has a length of a little less than a quarter in the circumferential direction. It is formed so as to continuously cover the lower surface.

  The outer cylindrical metal fitting 96 having such a structure is caulked and fixed to the cylindrical housing 84. That is, the outer cylindrical fitting 96 is overlapped with the cylindrical opening of the cylindrical housing 84 in the axial direction, and the outward projecting portion formed at the lower end of the cylindrical housing 84 on the receiving piece 110 of the outer cylindrical fitting 96. 88 is brought into contact with the upper side in the axial direction, and the caulking piece 112 extending radially inward is overlapped with the upper surface in the axial direction of the outward projecting portion 88 from the upper side in the axial direction. The outer projecting portion 88 of the tubular housing 84 is sandwiched and held between the receiving piece 110 of the outer tubular fitting 96 and the caulking piece 112 so as to hold the upper opening of the outer tubular fitting 96 and the tubular housing. A lower opening 84 is fixed by caulking. Thereby, the outer cylinder fitting 96 and the cylindrical housing 84 are connected and fixed in the axial direction, and the caulking connection structure in the present embodiment is configured including the outer cylinder fitting 96 and the cylindrical housing 84. The outer peripheral surface of the outward projecting portion 88 is overlapped with the inner peripheral surface of the outer cylindrical metal fitting 96 in the direction perpendicular to the axis at the location where the caulking piece 112 is formed, and the cylindrical housing 84 and the outer cylindrical metal fitting 96 are perpendicular to the axial direction. Are positioned relative to each other.

  Further, under the assembled state of the outer cylinder fitting 96, the caulking piece 112 that is bent and extends radially inward at the upper end portion of the outer cylinder fitting 96 is in relation to the inner peripheral portion of the fixing fitting 62 of the lid fitting 54. They are spaced apart by a predetermined distance in the axial direction. Further, the inner peripheral portion of the seal rubber 68 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 fixing bracket 62, and the caulking pieces 112 facing each other in the axial direction. And the fixing bracket 62. When the outer cylinder fitting 96 is excessively displaced in the axial direction relative to the inner cylinder fitting 94 fixedly assembled to the sleeve fitting 36 and the case fitting 50, the caulking piece 112 of the outer cylinder fitting 96 is moved to the case fitting 50. The fixed metal fitting 62 is abutted in a buffering manner through a seal rubber 68. As a result, a stopper mechanism is configured to limit the amount of relative displacement of the mover 20 relative to the stator 16 in the axial direction. As is clear from the above, the stopper portion in the present embodiment is configured by the flange-shaped fixing bracket 62 provided in the opening of the lid fitting 54 and the inner peripheral portion of the seal rubber 68 in the present embodiment. A buffer rubber layer is formed.

  In addition, when the outer cylinder fitting 96 is assembled, the stopper contact portion 116 formed at the lower end of the outer cylinder fitting 96 is opposed to the bottom wall portion of the bottom fitting 52 with a predetermined distance in the axial direction. It is positioned. 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 stator 16 of the needle | mover 20 is comprised. As is clear from the above, the second stopper portion in the present embodiment is configured by the bottom wall portion of the bottom metal fitting 52, and the second buffer rubber layer in the present embodiment is configured by the buffer rubber 118. ing.

  In this way, the inner cylinder fitting 94 is fitted and fixed to the sleeve fitting 36, and the outer cylinder fitting 96 is caulked and fixed to the cylindrical housing 84, whereby the stator 16 including the coil member 14; The mover 20 including the yoke fitting 18 is elastically connected by a support rubber elastic body 90.

  A plate spring 92 is disposed above the yoke fitting 18. The leaf spring 92 is composed of a thin-walled substantially disc-shaped metal spring, and has a circular hole in the central portion in the radial direction. Further, the leaf spring 92 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 92, the spaces on both sides sandwiching the leaf spring 92 are communicated with each other.

  A central portion of the leaf spring 92 is fixed to the shaft fitting 34. That is, the central portion of the leaf spring 92 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 92. The leaf spring 92 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 of the leaf spring 92 is superimposed on the upper surface of the outer peripheral portion of the yoke fitting 18. Furthermore, an annular spacer fitting 120 is overlaid on the outer peripheral edge of the leaf spring 92 from above in the axial direction, and an inward protruding portion 86 of the cylindrical housing 84 is overlaid on the spacer fitting 120 from above. Has been. Thereby, the outer peripheral edge of the leaf spring 92 is sandwiched between the yoke metal 18 and the axially facing surfaces of the cylindrical housing 84 via the spacer metal member 120 and fixedly assembled.

  As described above, the inner peripheral edge of the metal leaf spring 92 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 movable element 20 are elasticized by the leaf spring 92. Connected. In the present embodiment, the stator 16 and the mover 20 are connected by the support rubber elastic body 90 in the lower part in the axial direction and are connected by the leaf spring 92 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 opposing surface in the direction perpendicular to the axis of the permanent magnet 82 (the inner peripheral surface of the permanent magnet 82). And between the opposing surfaces of the inner peripheral side wall surface of the housing groove 80. Note that the coil 22 is disposed away from both the yoke fitting 18 and the permanent magnet 82.

  Further, a sealed air chamber 122 is formed between the bottom metal member 52 and the cover metal member 54 in the axial direction so as to be isolated from the external space and accommodated in the electromagnetic exciter 12. The sealed air chamber 122 is divided into two in the axial direction by the support rubber elastic body 90, and the first air in which the electromagnetic vibrator 12 is disposed on one side in the axial direction across the support support rubber elastic body 90. A chamber 124 is formed, and a second air chamber 126 is formed on the other side in the axial direction. The first air chamber 124 and the second air chamber 126 are provided between the outer tubular fitting 96 and the bottom fitting 52, between the seal rubber 68 and the tubular housing 84, and between the tubular housing 84 and the lid fitting 54. The air passages 128 are formed so as to communicate with each other through the air passages 128 that include the formed gaps. In particular, in the present embodiment, the first air chamber 124 and the second air chamber 126 are communicated with each other also by the notch 114 formed in the outer cylinder fitting 96.

  In such an active vibration damper 10 according to this embodiment, when power is supplied from the external power supply device 28 to the coil 22, a force is generated by a current flowing in the magnetic field formed by the permanent magnet 82. The generated force causes the mover 20 to be displaced relative to the stator 16 on one side in the axial direction. In addition, since the direction of the generated force is determined according to the direction of the magnetic pole of the permanent magnet 82 and the direction of the current flowing through the coil 22, the coil 22 is energized in a state where the permanent magnet 82 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 vibration force can be exerted on the vibration isolation target member, and the vibration of the vibration isolation target member can be reduced actively or in an offset manner.

  Such an active vibration damper 10 is provided with an outer cylindrical metal fitting 96 in which receiving pieces 110 and caulking pieces 112 are formed at a plurality of positions on the circumference at the end in the axial direction. The receiving piece 110 is brought into contact with the outward projecting portion 88 from below in the axial direction, and the projecting tip portion of the caulking piece 112 is bent inward in the radial direction so as to be axially upward with respect to the outward projecting portion 88. Thus, the outer tubular fitting 96 is fixedly connected to the tubular housing 84 in the axial direction. By adopting the outer cylinder fitting 96 structured according to this embodiment as described above, it is possible to realize positioning and connection fixation in the axial direction of the outer cylinder fitting 96 and the cylindrical housing 84 without providing a separate member. I can do it. In addition, by integrally forming the receiving piece 110 and the caulking piece 112 on the outer cylinder fitting 96, the axial positioning and connection fixing of the outer cylinder fitting 96 and the cylindrical housing 84 can be realized with a small number of parts.

  Further, in the outer cylinder fitting 96 according to the present embodiment, the receiving piece 110 and the caulking piece 112 formed on the outer cylinder fitting 96 are formed at different positions on the circumference, and the receiving piece 110 is the outer cylinder fitting. It is formed so as to protrude radially inward from the upper end of the peripheral wall portion of 96. Therefore, even in the outer cylindrical metal fitting 96 in which the receiving piece 110 and the caulking piece 112 are integrally formed, it is possible to avoid an increase in diameter at the connecting portion with the cylindrical housing 84, and Compactness can be achieved.

  In the present embodiment, the receiving piece 110 is bent and extends inward in the direction perpendicular to the axis. Therefore, the contact area between the receiving piece 110 of the outer cylindrical metal fitting 96 and the outward projecting portion 88 of the cylindrical housing 84 can be increased, and the outer cylindrical metal fitting 96 and the cylindrical housing 84 are stabilized in the axial direction. Positioning.

  Further, in the present embodiment, a notch 114 cut from the upper end of the peripheral wall portion of the outer cylindrical metal fitting 96 is provided between the circumferential direction of the receiving piece 110 and the caulking piece 112 and between the circumferential directions of the adjacent receiving pieces 110 and 110. Is provided. Thereby, a gap is formed between the adjacent receiving pieces 110 and the caulking pieces 112, and problems such as wrinkles and distortion due to bending and stretching of the receiving pieces 110 and the caulking pieces 112 can be avoided. In addition, the first air chamber 124 and the second air chamber 126 are communicated with each other through the notch 114, and the pressure difference between the air chambers 124 and 126 can be quickly eliminated.

  Further, the cylindrical sleeve fitting 36 is fitted and fixed in the central hole of the support rubber elastic body 90 having an annular plate shape, and the inner space (center hole 42 formed on the inner peripheral side of the sleeve fitting 36 is also fixed. ) Is formed in the sleeve fitting 36, and the lead wire 26 for power feeding is inserted into the inner space from the outer circumference side of the sleeve fitting 36 through the slit 46, whereby the center of the support rubber elastic body 90 is formed. The power supply lead 26 can be taken out to the external space by skillfully utilizing the holes. Thus, the power supply lead wire 26 can be taken out by skillfully utilizing the shape of the support rubber elastic body 90 without providing a special hole or the like for taking out the power supply lead wire 26 to the outside.

  In the active vibration damping device according to the present embodiment, the first air chamber 124 and the second air chamber 126 formed on both sides of the support rubber elastic body 90 are communicated with each other through the air passage 128. Has been. As a result, even when a pressure difference occurs between the first air chamber 124 and the second air chamber 126, the pressure difference is quickly eliminated by the flow of air through the air passage 128. Therefore, even when there is a relative pressure difference between the first air chamber 124 and the second air chamber 126, the deformation of the support rubber elastic body 90 due to the pressure difference is prevented, and the stator 16 and the movable element 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.

  FIG. 8 shows an active vibration damper 130 as a second embodiment of the present invention. In the following description, members or parts that are substantially the same as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment in the drawings, and the description thereof is omitted.

  More specifically, in the active vibration damper 130 according to the present embodiment, an outer cylinder fitting 132 is adopted as a cylindrical attachment fitting that is vulcanized and bonded to the outer peripheral surface of the support rubber elastic body 90. The outer cylinder fitting 132 has a substantially cylindrical shape similar to that of the first embodiment, and is an inner cylinder that is vulcanized and bonded to the inner peripheral edge of the support rubber elastic body 90 and is fitted and fixed to the sleeve fitting 36. It is disposed on the substantially same central axis as the metal fitting 94.

  A receiving portion 134 and a caulking piece 112 are integrally formed at the upper end opening of the outer tube fitting 132. As shown in FIG. 8, the receiving portion 134 is configured by using the upper end portion of the outer cylinder fitting 132. In other words, the receiving portion 134 in the present embodiment is formed using the vicinity of the upper opening of the outer cylinder fitting 132, and has a cylindrical shape divided into a plurality in the circumferential direction. The receiving portion 134 is positioned below the caulking piece 112 in the axial direction, and the axial dimension of the outer tubular fitting 132 at the location where the receiving portion 134 is formed is the same as that of the outer tubular fitting 132 at the location where the caulking piece 112 is formed. It is smaller than the axial dimension.

  As shown in FIG. 9, the outer projecting portion 88 of the cylindrical housing 84 is brought into contact with the upper end surface of the receiving portion 134 from above in the axial direction, and the projecting tip portion of the caulking piece 112 has a diameter. The outer projecting portion 88 is held between the receiving portion 134 and the caulking piece 112 in the axial direction by being bent inward in the direction and overlapping the outer projecting portion 88 from above in the axial direction. ing. Thus, the outer cylinder fitting 132 is connected and fixed to the cylindrical housing 84 in the axial direction.

  Even if the outer cylinder fitting 132 according to this embodiment is adopted, the same effects as those of the first embodiment can be obtained, and caulking can be realized with a small number of parts. It is possible to prevent the diameter of the connecting portion of the cylindrical housing 84 from being increased, and to advantageously ensure the free length of the support rubber elastic body 90 disposed by being vulcanized and bonded to the inner peripheral surface of the outer cylinder fitting 132.

  FIG. 10 shows an automobile engine mount 136 as a third embodiment of the present invention. The engine mount 136 as an anti-vibration coupling body includes a first mounting bracket 138 as a fixing member and a second mounting bracket 140 as a cylindrical mounting bracket that are spaced apart from each other. The second mounting bracket 140 has a structure elastically connected by a main rubber elastic body 142 as a rubber elastic body, and the first mounting bracket 138 is mounted on a power unit of an automobile as a vibration isolation target member, By attaching the second mounting bracket 140 to the body of the automobile as the second vibration isolation target member, the power unit is supported by the vehicle body in an anti-vibration manner. The engine mount 136 according to the present embodiment is mounted in a state where the vertical direction in FIG. 1 is a substantially vertical vertical direction. In the following description, the vertical direction is basically the vertical direction in FIG. It shall be said.

  More specifically, the first mounting bracket 138 is made of a metal material such as an aluminum alloy and has a substantially circular block shape. Further, a fixing bolt 144 is protruded upward in the axial direction at the upper end portion of the first mounting bracket 138. Then, the fixing bolt 144 is screwed to a power unit (not shown), whereby the first mounting bracket 138 is fixed to the power unit.

  The second mounting bracket 140 has a thin, large-diameter, generally cylindrical shape, and is disposed on substantially the same central axis at a predetermined distance in the radial direction from the first mounting bracket 138. The upper portion in the axial direction is a tapered portion 146 that gradually increases in diameter toward the upper side.

  Further, a receiving piece 148 and a caulking piece 152 are integrally formed at the lower end portion of the second mounting bracket 140. The receiving pieces 148 are formed so as to extend radially inward from the lower end opening of the second mounting bracket 140, and are provided at a plurality of locations on the circumference of the lower end opening of the second mounting bracket 140. It has been. On the other hand, the caulking piece 152 is formed so as to extend radially inward from the lower end opening of the second mounting bracket 140, and a plurality of the caulking pieces 152 are formed at different locations on the circumference. In this embodiment, the caulking piece 152 is positioned lower in the axial direction than the receiving piece 148, and the axial dimension of the second mounting bracket 140 at the location where the caulking piece 152 is formed is the same as that of the receiving piece 148. It is made larger than the axial dimension of the second mounting bracket 140 at the formation location. In the present embodiment, the caulking pieces 152 are formed at four positions at equal intervals on the circumference, and receiving pieces 148 are formed between the circumferential directions of the adjacent caulking pieces 152 and 152, respectively.

  A main rubber elastic body 142 is disposed between the radially opposing surfaces of the first mounting bracket 138 and the second mounting bracket 140. The main rubber elastic body 142 has a substantially truncated cone shape. In addition, a circular recess 154 that opens downward in the axial direction is formed at the radially central portion of the large-diameter end of the main rubber elastic body 142. The first mounting bracket 138 is fixed in the axially embedded state on the small diameter side end of the main rubber elastic body 142, and the second mounting bracket 140 is mounted on the outer peripheral surface of the large diameter side end. The first mounting bracket 138 and the second mounting bracket 140 are elastically connected by the main rubber elastic body 142. In short, the main rubber elastic body 142 in the present embodiment is formed as an integrally vulcanized molded product that integrally includes the first mounting bracket 138 and the second mounting bracket 140.

  An orifice fitting 156 is disposed below the main rubber elastic body 142. The orifice fitting 156 is formed of a thick metal material having a substantially disk shape, and has a circular through hole penetrating in the axial direction at a central portion in the radial direction. A seal rubber 158 is vulcanized and bonded to the outer periphery of the orifice fitting 156. The seal rubber 158 is formed so as to cover the outer peripheral surface of the orifice metal fitting 156 and the upper surface of the outer peripheral edge portion, and is continuously formed over the entire periphery. The orifice fitting 156 is inserted into the inner peripheral side of the second mounting fitting 140 and assembled. Under the assembled state to the second mounting bracket 140, the orifice bracket 156 is positioned between the receiving piece 148 and the caulking piece 152 in the axial direction. Note that the upper end surface of the orifice fitting 156 is overlapped with the lower end surface of the receiving piece 148 in the axial direction via a seal rubber 158.

  A diaphragm 160 is disposed below the orifice fitting 156. The diaphragm 160 is formed of a flexible rubber material and has a thin disk shape. In addition, a fixing bracket 162 is vulcanized and bonded to the outer peripheral portion of the diaphragm 160. The fixing metal 162 has a substantially annular shape, and an inner peripheral surface, an outer peripheral surface, and a lower end surface thereof are covered with a seal rubber layer 164 integrally formed with the diaphragm 160. Then, the fixing bracket 162 is inserted into the second mounting bracket 140 from below in the axial direction, and the upper end surface of the fixing bracket 162 is overlapped with the lower end surface of the orifice bracket 156 so that it is positioned and assembled in the axial direction. ing.

  In this manner, with the orifice fitting 156 and the diaphragm 160 disposed on the inner peripheral side of the second mounting fitting 140, the orifice fitting is subjected to a diameter reduction process such as an eight-way restriction on the second fitting fitting 140. The second mounting bracket 140 is externally fitted and fixed to the fixing bracket 162 to which 156 and the diaphragm 160 are vulcanized and bonded. In particular, in the present embodiment, the seal rubber 158 fixed to the outer peripheral surface of the orifice fitting 156 and the seal rubber layer 164 fixed to the outer peripheral surface of the fixing fitting 162 include the orifice fitting 156 and the fixing fitting 162 and the second mounting fitting 140. The orifice fitting 156 and the fixing fitting 162 are assembled in a fluid-tight manner with respect to the second attachment fitting 140.

  In addition, when the diaphragm 160 is attached to the second mounting bracket 140, the axially upper opening of the second mounting bracket 140 is fluid-tightly closed by the main rubber elastic body 142, and the axially lower The opening on the side is closed fluid-tightly with a diaphragm 160. Thereby, on the inner peripheral side of the second mounting bracket 140, a fluid sealing region is formed that is isolated from the external space and sealed with the incompressible fluid between the main rubber elastic body 142 and the diaphragm 160 in the axial direction. For example, water, alkylene glycol, polyalkylene glycol, silicone oil or the like is employed as the incompressible fluid to be sealed in the fluid sealing region. In particular, in order to effectively obtain a vibration isolation effect based on the fluid flow action. It is desirable to employ a low viscosity fluid of 0.1 Pa · s or less. The incompressible fluid is sealed by, for example, assembling the diaphragm 160 into the integrally vulcanized molded product of the main rubber elastic body 142 having the first and second mounting brackets 138 and 140 in the incompressible fluid. Etc.

  In addition, an orifice fitting 156 is disposed in the fluid sealing region so as to spread in the direction perpendicular to the axis. As a result, the fluid sealing region is divided into two parts up and down across the orifice fitting 156. On the upper side in the axial direction across the orifice fitting 156, a part of the wall portion is constituted by the main rubber elastic body 142, and the first A pressure receiving chamber 166 is formed in which pressure fluctuation is caused by elastic deformation of the main rubber elastic body 142 when vibration is input between the mounting bracket 138 and the second mounting bracket 140. On the lower side in the axial direction, a part of the wall portion is constituted by a diaphragm 160, and an equilibrium chamber 168 is formed in which volume change is easily allowed based on elastic deformation of the diaphragm 160.

  In addition, a circular hole penetrating in the axial direction is formed in the central portion in the radial direction of the orifice fitting 156, and an orifice passage 170 that communicates the pressure receiving chamber 166 and the equilibrium chamber 168 is formed using the circular hole. Has been. The orifice passage 170 is always maintained in a communication state in which the pressure receiving chamber 166 and the equilibrium chamber 168 communicate with each other.

  When the vibration to be controlled is input, a relative pressure fluctuation is induced between the pressure receiving chamber 166 in which the pressure fluctuation is caused and the equilibrium chamber 168 in which the volume change is allowed based on the deformation of the diaphragm 160. Fluid flow through the orifice passage 170 is generated between the two chambers 166 and 168. As a result, the anti-vibration effect based on the resonance action of the fluid that flows between the pressure receiving chamber 166 and the equilibrium chamber 168 through the orifice passage 170 is effective against vibration in the axial direction (vertical direction in FIG. 10) to be anti-vibrated. It has come to be demonstrated.

  Note that the resonance frequency of the orifice passage 170 can be tuned by adjusting, for example, the passage cross-sectional area and the passage length of the orifice passage 170, and is appropriately set according to the frequency of the vibration-proof vibration. .

  A base metal fitting 172 as a separate metal fitting is disposed below the diaphragm 160. The base metal fitting 172 has a substantially bottomed cylindrical shape that is slightly smaller in diameter than the second mounting metal fitting 140, and the cylindrical opening has a connecting portion that extends radially outward over the entire circumference. The flange portion 174 is integrally formed. Further, a bolt hole penetrating the bottom wall portion in the axial direction is formed in the radial center portion of the base metal fitting 172, and a mounting bolt 176 inserted through the bolt hole and extending downward in the axial direction is a base metal fitting. 172 is fixedly provided.

  The base metal fitting 172 is inserted into the second attachment metal fitting 140 from below the diaphragm 160, and is fixed to the fixing metal fitting 162 with the flange portion 174 fixed to the outer peripheral portion of the diaphragm 160 in the axial direction via the seal rubber 158. While being overlapped, it is caulked and fixed to the lower end of the second mounting bracket 140.

  That is, the orifice fitting 156 and the fixing fitting 162 are overlapped in the axial direction and positioned in the axial direction, and the upper end surface of the orifice fitting 156 is axially downward with respect to the receiving piece 148 of the second mounting fitting 140. The orifice fitting 156 and the fixing fitting 162 are positioned in the axial direction with respect to the second attachment fitting 140. In addition, the base bracket 172 is inserted from the lower end opening of the second mounting bracket 140, and the flange portion of the base bracket 172 from the lower side in the axial direction with respect to the fixed bracket 162 positioned in the axial direction with respect to the receiving piece 148. By overlapping 174, the base bracket 172 is positioned in the axial direction with respect to the second mounting bracket 140. Then, the caulking piece 152 formed at the lower end in the axial direction of the second mounting bracket 140 is superimposed on the flange portion 174 of the base bracket 172 from below in the axial direction. As a result, the flange portion 174 formed in the cylindrical opening of the base metal fitting 172 is caulked and fixed by the receiving piece 148 and the caulking piece 152 formed in the lower end opening of the second attachment metal fitting 140, and the base metal fitting 172 is connected and fixed to the second mounting bracket 140.

  As is clear from the above, the caulking connection structure in the present embodiment is configured including the second mounting bracket 140 and the base bracket 172. Further, in the present invention, the receiving piece 148 and the caulking piece 152 do not necessarily have to be directly brought into contact with the flange portion 174 to be caulked and fixed, but via the orifice fitting 156, the fixing fitting 162, or the like. It may be contacted indirectly. Further, the cylindrical opening in the present embodiment is constituted by the upper opening of the base metal fitting 172, and the connection opening in the present embodiment is constituted by the lower opening of the second mounting fitting 140. .

  By connecting and fixing the base bracket 172 to the second mounting bracket 140 in this way, the second mounting bracket 140 is fixed to a vehicle body (not shown) as a second anti-vibration connecting member. That is, the mounting bolt 176 provided on the bottom wall portion of the base metal fitting 172 is screwed to the vehicle body so that the base metal fitting 172 is fixed to the vehicle body and is connected and fixed to the base metal fitting 172. The mounting bracket 140 is fixed to the vehicle body via the base bracket 172. As is clear from the above, the fixing portion in the present embodiment includes the base metal fitting 172.

  In the automobile engine mount 136 according to the present embodiment, the receiving pieces that extend radially inward to the axially lower openings of the second mounting bracket 140 fixed to the outer peripheral surface of the main rubber elastic body 142 are provided. 148 and the caulking piece 152 are integrally formed, and the flange portion 174 formed in the cylindrical opening of the base metal fitting 172 is caulked and fixed by the receiving piece 148 and the caulking piece 152. According to this, it is possible to prevent the diameter of the connecting portion between the second mounting bracket 140 and the base bracket 172 from being increased, and the engine mount 136 can be realized in a compact manner.

  In addition, a large inner diameter dimension of the portion fixed to the outer peripheral portion of the main rubber elastic body 142 in the second mounting bracket 140 is secured while preventing an increase in the diameter of the connecting portion between the second mounting bracket 140 and the base bracket 172. I can do it. Therefore, while realizing a compact engine mount 136, the rubber volume of the main rubber elastic body 142 can be increased, and the durability of the main rubber elastic body 142 and the degree of freedom in tuning can be improved.

  As mentioned above, although some embodiment of this invention has been described, this is an illustration to the last, Comprising: This invention is not limited at all by the specific description in this embodiment.

  For example, in the first and second embodiments, in the active vibration dampers 10 and 130, the caulking connection structure (the outer tubular metal fittings 96 and 132 and the tubular housing 84) having a structure according to the present invention is employed. An example is shown, and in the third embodiment, in an automobile engine mount 136 as an anti-vibration coupling body, a caulking coupling structure (second mounting bracket 140 and base bracket) having a structure according to the present invention is shown. 172) is shown as an example, but the scope of the present invention is not construed as being limited in any way by the specific description in the above embodiment, and other than the vibration damper and the vibration proof coupling body. The present invention can also be applied to a caulking connection structure for a vibration isolator.

  In the first to third embodiments, the example in which the receiving portion and the caulking portion are provided in any one of the opening portions in the axial direction of the cylindrical mounting bracket is shown. It is not necessary to be formed only in one of the axial openings of the cylindrical mounting bracket. For example, a plurality of receiving portions and caulking portions may be formed at both ends in the axial direction of the cylindrical mounting bracket, and separate brackets may be assembled from both sides in the axial direction.

  Moreover, in said 1st thru | or 3rd embodiment, although the connection part is continuously formed over the perimeter in the cylindrical opening part of a separate metal fitting, a connection part does not necessarily continue over the perimeter. However, it is not necessary to form the connecting portion, and the connecting portion may be divided into a plurality of portions in the circumferential direction.

  Further, in the first to third embodiments, the separate metal fitting has a bottomed cylindrical shape, but the separate metal fitting does not necessarily have a bottomed cylindrical shape, for example, a cylindrical opening on both sides in the axial direction. A cylindrical shape provided with a portion may be used. Furthermore, when the separate metal fitting has a cylindrical shape or the like and is provided with cylindrical openings on both sides in the axial direction, connecting portions are provided on the cylindrical openings on both sides in the axial direction, and the cylinders are provided on both sides in the axial direction. The shape mounting bracket may be fixed by caulking.

  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 1st 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 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. The front view which shows the outer cylinder metal fitting. The longitudinal cross-sectional view which shows the active vibration damper as 2nd embodiment of this invention. Explanatory drawing which expands and shows the receiving piece of the active vibration damper. The longitudinal cross-sectional view which shows the engine mount for motor vehicles as 3rd embodiment of this invention.

Explanation of symbols

10: active vibration damper, 12: electromagnetic actuator, 14: coil member, 16: stator, 18: yoke fitting, 20: mover, 36: sleeve fitting, 52: bottom fitting, 62: fixing fitting, 68 : Seal rubber, 84: Cylindrical housing, 88: Outward projecting part, 90: Elastic support elastic body, 96: Outer cylindrical metal fitting, 110: Receiving piece, 112: Caulking piece, 116: Stopper contact part, 118: Buffer rubber

Claims (12)

The cylindrical mounting bracket that is vulcanized and bonded to the outer peripheral surface of the rubber elastic body is pivoted with respect to the cylindrical opening provided in the rubber elastic body and a separate mounting bracket that constitutes the vibration isolator together with the cylindrical mounting bracket. The cylindrical mounting bracket and the separate bracket are connected by overlapping in the direction and caulking and fixing one connecting side opening in the axial direction of the cylindrical mounting bracket to the cylindrical opening of the separate bracket. A caulking connection structure for a fixed vibration isolator,
A flange-shaped connecting portion is provided in the cylindrical opening of the separate metal fitting, while the connecting-side opening of the cylindrical mounting bracket is abutted against an outer surface in the axial direction of the connecting portion. And a plurality of caulking portions that wrap around the connecting portion from the outer peripheral side and are superimposed on the inner side surface in the axial direction of the connecting portion. A caulking connection structure for an anti-vibration device, wherein the connecting side opening of the cylindrical mounting bracket is caulked and fixed to the connecting portion of the cylindrical opening of the separate mounting bracket.   2. The caulking connection structure for an anti-vibration device according to claim 1, wherein a receiving piece that bends and extends toward an inner peripheral side is provided at the connection side opening of the cylindrical mounting bracket, and the receiving portion is configured by the receiving piece. body.   In the connection side opening of the cylindrical mounting bracket, a caulking piece is provided that bends and extends toward the inner peripheral side at a position protruding outward in the axial direction from the receiving piece, and the caulking piece constitutes the caulking portion. The caulking connection structure for a vibration isolator according to claim 2, wherein the connecting portion of the separate metal fitting is caulked and fixed in an axial direction between the receiving piece and the caulking piece.   In the cylindrical mounting bracket, the receiving piece and the caulking piece are formed at a predetermined distance in the circumferential direction, and the axial direction of the cylindrical mounting bracket is between the receiving piece and the caulking piece adjacent to each other. The caulking connection structure for a vibration isolator according to claim 3, wherein a notch extending from the end portion with a predetermined width in the axial direction is formed.   5. The anti-vibration device according to claim 1, wherein an inner diameter dimension of the cylindrical mounting bracket on the connection side opening is larger than an outer diameter dimension of the separate opening on the cylindrical opening. Caulking connection structure.   The caulking connection structure for an anti-vibration device according to any one of claims 1 to 5, wherein a fixing member fixed to an anti-vibration target member is fixed to a central portion of the rubber elastic body.   A stopper portion that is spaced apart and opposed to the caulking portion in the axial direction is fixed to the fixing member, and a buffer rubber layer is provided on at least one of the facing surfaces of the caulking portion and the stopper portion. The caulking connection structure for an anti-vibration device according to claim 6, wherein an axial stopper mechanism is configured.   A stopper abutting portion having an enlarged diameter is formed at the other opening in the axial direction of the cylindrical mounting bracket, and is spaced apart from the other opening in the axial direction of the cylindrical mounting bracket in the axial direction. An opposing second stopper portion is fixedly provided with respect to the fixing member, and a second buffer rubber layer is formed on at least one of the opposing surfaces of the stopper abutting portion and the second stopper portion. The caulking connection structure for a vibration isolator according to claim 6 or 7, wherein the second stopper mechanism in the axial direction is configured.   9. A second anti-vibration device that employs the caulking connection structure for an anti-vibration device according to claim 6 and is anti-vibrated and connected to the anti-vibration target member to which the fixing member is fixed. An anti-vibration coupling body, such as an engine mount, formed by providing a fixing portion for fixing the caulking coupling structure to a vibration target member on the separate metal fitting.   A caulking connection structure for a vibration isolator according to any one of claims 6 to 8 is adopted, and a mass member is provided integrally in the separate metal fitting, and the mass member is attached to the fixing member. A vibration damper formed by elastically supporting the rubber elastic body.   The vibration damper according to claim 10, wherein an actuator that exerts an excitation force between the mass member and the fixed member is provided to exert an active vibration damping effect.   It has a mover assembled to be displaceable in the axial direction with respect to the stator. A coil member is assembled to the stator or the mover, and a yoke member is assembled around the coil member to form a magnetic path. An electromagnetic actuator that displaces the mover relative to the stator in the axial direction by the action of a magnetic field generated by energizing the coil member. The vibration damper according to claim 11, wherein the mass member is fixedly provided on the movable element, and the stator is fixedly provided on the fixed member.

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