JP2005155899A

JP2005155899A - Active liquid sealed vibration absorbing device

Info

Publication number: JP2005155899A
Application number: JP2004174800A
Authority: JP
Inventors: Hideaki Shimazu; 英明島津; Toshiyuki Kitano; 利幸北野
Original assignee: Toyo Tire and Rubber Co Ltd
Current assignee: Toyo Tire Corp
Priority date: 2003-11-04
Filing date: 2004-06-11
Publication date: 2005-06-16

Abstract

<P>PROBLEM TO BE SOLVED: To provide an active liquid sealed vibration absorbing device having simplified construction with its increased output and contributing to a smaller size with a less number of parts. <P>SOLUTION: The vibration absorbing device comprises a first mounting tool 1 and a second mounting tool 3 connected to each other via a vibration absorbing base 3, a rubber wall 5 provided on the second mounting tool 2 to form a first liquid chamber 4, a diaphragm 7 forming a second liquid chamber 6 as part of a chamber wall, the first liquid chamber 4 and the second liquid chamber 6 being communicated with each other via an orifice 8, and an iron core movable type actuator 9 constructed as part of a needle 30 which can reciprocate a shaft member 27 connected to the rubber wall 5 in the axial direction in relation to a stator 28. A coil 33 of the stator 28 is excited for driving the shaft member 27 in both outward and homeward strokes to vibrate the rubber wall 5, whereby pressure in the first liquid chamber 4 is controlled. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、内部液室の圧力を制御することで防振効果を高める形式の能動型液封入式防振装置に関するものである。 The present invention relates to an active liquid-filled vibration isolator of the type that enhances the vibration isolating effect by controlling the pressure of an internal liquid chamber.

能動型液封入式防振装置は、一般に、第１取付具と、筒状の第２取付具と、これらを連結するゴム状弾性材から成る防振基体と、第２取付具に取付けられて防振基体との間に液体封入室を形成する第１ダイヤフラムと、液体封入室を防振基体側の第１液室と前記第１ダイヤフラム側の第２液室に仕切る仕切り体と、第１液室と第２液室を連通させるオリフィスと、第１液室の室壁の一部を形成するゴム壁と、該ゴム壁を加振駆動して前記第１液室の圧力を制御する電磁石式のアクチュエータとを設けて構成されている。 An active liquid-filled vibration isolator is generally attached to a first fixture, a cylindrical second fixture, a vibration isolating base made of a rubber-like elastic material that connects them, and a second fixture. A first diaphragm that forms a liquid sealing chamber between the vibration isolating substrate, a partition that partitions the liquid sealing chamber into a first liquid chamber on the vibration isolating substrate side and a second liquid chamber on the first diaphragm side; An orifice for communicating the liquid chamber and the second liquid chamber, a rubber wall forming a part of the chamber wall of the first liquid chamber, and an electromagnet for controlling the pressure of the first liquid chamber by driving the rubber wall to vibrate And an actuator of the type.

そして、例えば自動車にエンジンマウントとして組付けられ、第１液室の圧力をアクチュエータを介して制御することで、マウントの低動ばね化を図る等して優れた振動抑制効果を得ている。 For example, it is assembled as an engine mount in an automobile, and by controlling the pressure of the first liquid chamber via an actuator, an excellent vibration suppressing effect is obtained, for example, by reducing the dynamic spring of the mount.

従来、上記の能動型液封入式防振装置では、下記の特許文献１や特許文献２に開示されているように、仕切り体の外周部と第２取付具の内周面との間にオリフィスを形成し、仕切り体の中央に形成した凹部に加振手段となるアクチュエータの可動子としての軸部材を挿入して、前記凹部の内周部と該軸部材の先端部とにわたって前記ゴム壁を加硫成形し、第２取付具の内周部と該軸部材の一部とにわたってダイヤフラムを加硫成形し、アクチュエータの軸部材を介して前記ゴム壁を加振駆動可能に設けている。
特開２００１−３０４３２９号公報特開２００２−１９５３４２号公報 Conventionally, in the above active liquid-filled vibration isolator, as disclosed in the following Patent Document 1 and Patent Document 2, an orifice is provided between the outer peripheral portion of the partition and the inner peripheral surface of the second fixture. And inserting a shaft member as a mover of an actuator serving as a vibration means into a recess formed in the center of the partition, and extending the rubber wall between the inner peripheral portion of the recess and the tip of the shaft member. The diaphragm is vulcanized and molded, and the diaphragm is vulcanized and molded over the inner peripheral portion of the second fixture and a part of the shaft member, and the rubber wall is provided so as to be vibrated through the shaft member of the actuator.
JP 2001-304329 A JP 2002-195342 A

上記従来の構成によれば、仕切り体の中央に形成した凹部にアクチュエータの軸部材を挿入し、前記凹部の内周部と軸部材の先端部とにわたって前記ゴム壁を加硫成形し、第２取付具の内周部と軸部材の一部とにわたってダイヤフラムを加硫成形しているため、ゴム壁や軸部材の周りの部品点数が多くなって構造が複雑化していた。 According to the above conventional configuration, the shaft member of the actuator is inserted into the recess formed in the center of the partition, and the rubber wall is vulcanized and formed between the inner peripheral portion of the recess and the tip of the shaft member. Since the diaphragm is vulcanized and formed over the inner peripheral portion of the fixture and a part of the shaft member, the number of parts around the rubber wall and the shaft member is increased and the structure is complicated.

さらに、電磁石式のアクチュエータの駆動方式として、前記特許文献１のように、上下に間隔をおいて同軸上に二つのコイルを配し、その空芯部にマグネットを取設した軸部材を挿通配置し、コイルへの通電によってコイルと磁石との間に生じる電磁力により、マグネット付の軸部材を軸方向に往復動させる所謂ムービングマグネット型の場合は、大きい力を得るためには外径が大きくなり、小型化、軽量化には不向きであり、またマグネットが大型化すると、安価でなくなり、衝撃にも弱くなると言った問題がある。 Furthermore, as a driving method of an electromagnet actuator, as in Patent Document 1, a shaft member having two coils arranged coaxially with a space in the vertical direction and having a magnet installed in its air core is inserted and arranged. In the case of a so-called moving magnet type in which a shaft member with a magnet is reciprocated in the axial direction by electromagnetic force generated between the coil and the magnet by energizing the coil, the outer diameter is large in order to obtain a large force. Therefore, there is a problem that it is not suitable for miniaturization and weight reduction, and that if the magnet is enlarged, it is not cheap and weak against shock.

また、前記特許文献２のように、ヨーク部材やコイルをインナー部に配し、これを囲むアウター部を軸方向に往復動する加振部材とし、該アウター部を前記ゴム壁に連結して加振するように構成した場合、前記アウター部を保持金具の壁面から離して軸心部のみで支持することになり、支持状体が不安定になる上、やはり大きい出力を得るためには外径を大きくする必要がある。 Further, as in Patent Document 2, a yoke member and a coil are arranged in the inner part, and the outer part surrounding the yoke part is used as a vibration member that reciprocates in the axial direction, and the outer part is connected to the rubber wall and applied. When configured to vibrate, the outer part is separated from the wall surface of the holding bracket and is supported only by the shaft center part, and the support-like body becomes unstable. Need to be larger.

本発明の目的は、構造の簡素化を図ることができるとともに部品数を少なくできて、組み立て作業を簡略化でき、しかも出力を大きくしてかつ小型化にも寄与できる能動型液封入式防振装置を提供する点にある。 An object of the present invention is to provide an active liquid-filled vibration proofing that can simplify the structure, reduce the number of parts, simplify assembly work, increase output, and contribute to downsizing. The point is to provide a device.

本発明は、第１取付具と筒状の第２取付具をゴム状弾性材から成る防振基体を介して連結し、前記第２取付具に前記防振基体と対向してゴム壁を設け、前記防振基体と前記ゴム壁との間を第１液室とし、この第１液室とは別にダイヤフラムが室壁の一部をなす第２液室を設け、前記第１液室と前記第２液室とをオリフィスにより連通させ、前記第１液室の室壁の一部をなす前記ゴム壁に連結した加振手段により該ゴム壁を加振して前記第１液室の圧力を制御するようにした能動型液封入式防振装置であって、前記筒状の第２取付具の内部において、前記ゴム壁の前記第１液室側とは反対側に対向して前記ダイヤフラムが配され、前記ゴム壁の外周部に加硫接着されたオリフィス形成金具及び前記ダイヤフラムの外周部がそれぞれ前記第２取付具の内周に対し嵌着固定され、前記ゴム壁と前記ダイヤフラムとの間が該ゴム壁により前記第１液室と仕切られた第２液室として形成されるとともに、前記オリフィス形成金具が前記第１液室と第２液室を連通させるオリフィスを形成してなり、前記加振手段は、前記ダイヤフラムを液密状態で貫通して前記ゴム壁に連結された軸部材を有し、該軸部材が、その外方に配した固定子に関して軸方向に往復動可能な可動子の少なくとも一部として構成された鉄心可動形のアクチュエータよりなり、前記固定子に備えるコイルが励磁されることにより、前記軸部材が往動行程及び復動行程の両方向に駆動されて前記ゴム壁を加振するように構成されてなることを特徴とする。 In the present invention, the first fixture and the cylindrical second fixture are connected via a vibration-proof base made of a rubber-like elastic material, and a rubber wall is provided on the second fixture so as to face the vibration-proof base. In addition, a first liquid chamber is provided between the vibration isolating base and the rubber wall, and a second liquid chamber in which a diaphragm forms a part of the chamber wall is provided separately from the first liquid chamber, and the first liquid chamber and the The second liquid chamber is communicated with an orifice, and the rubber wall is vibrated by a vibration means connected to the rubber wall that forms a part of the chamber wall of the first liquid chamber, so that the pressure of the first liquid chamber is increased. An active liquid-filled vibration isolator configured to be controlled, wherein the diaphragm is opposed to the side opposite to the first liquid chamber side of the rubber wall inside the cylindrical second fixture. The orifice forming metal fitting and the outer peripheral part of the diaphragm which are vulcanized and bonded to the outer peripheral part of the rubber wall are respectively attached to the second mounting The rubber wall and the diaphragm are formed as a second liquid chamber partitioned from the first liquid chamber by the rubber wall, and the orifice-forming fitting is An orifice for communicating the first liquid chamber and the second liquid chamber is formed, and the vibration means has a shaft member that penetrates the diaphragm in a liquid-tight state and is connected to the rubber wall. Is composed of an iron core movable actuator configured as at least a part of a mover capable of reciprocating in the axial direction with respect to the stator disposed on the outside, and the coil provided in the stator is excited, The shaft member is configured to be driven in both the forward and backward strokes to vibrate the rubber wall.

本発明は、前記の構成を採用したことにより、加振手段としてのアクチュエータの軸部材の往復動により発生する力の立ち上がりの遅れをなくすることができ、第１液室の圧力制御をスムーズにかつ迅速に行えるばかりか、部品点数の増加を抑制することもできる。また、鉄心可動形のために、外径を大きくすることなく、大きな出力を得ることができる。 By adopting the above-described configuration, the present invention can eliminate the delay in the rise of force generated by the reciprocating motion of the shaft member of the actuator as the vibration means, and smoothly control the pressure in the first liquid chamber. Moreover, not only can it be performed quickly, but also an increase in the number of parts can be suppressed. Moreover, since the iron core is movable, a large output can be obtained without increasing the outer diameter.

例えば、アクチュエータをソレノイド式に構成し、ゴム壁に連結したアクチュエータの軸部材を往動行程で電気的に駆動させ、復動行程はコイルスプリングの弾性力によって機械的に復帰させる構造では、往動行程の初期にコイルスプリングの弾性力に抗しなければならないことから、図７に示すように、アクチュエータの駆動によって本防振装置に作用する力Ｆ［Ｎ］の立ち上がりがｔ１［ｓ（秒）］遅れるとともに、この遅れｔ１の値が各往動行程ごとにばらつきやすい。そして、復動行程では力Ｆが急激に低下してＦ−ｔ曲線（Ｆと時間ｔの関係を表す曲線）が滑らかにならず、振動の吸収を正確に行うことができないという問題がある。この問題を解消するために、第１液室内に、ゴム壁との間に第３の液室を形成するフィルター部材を設けて、Ｆ−ｔ曲線を正弦波曲線に補正する手段を採用することも考えられるが、これではフィルター部材の分だけ部品点数が増加してしまう。 For example, in a structure in which the actuator is configured as a solenoid type, the shaft member of the actuator connected to the rubber wall is electrically driven in the forward stroke, and the backward stroke is mechanically restored by the elastic force of the coil spring. Since it is necessary to resist the elastic force of the coil spring at the beginning of the stroke, as shown in FIG. 7, the rising of the force F [N] acting on the vibration isolator by driving the actuator is t1 [s (seconds). In addition to delay, the value of this delay t1 is likely to vary for each forward travel stroke. In the backward stroke, there is a problem that the force F rapidly decreases and the Ft curve (curve representing the relationship between F and time t) is not smooth, and vibration cannot be accurately absorbed. In order to solve this problem, a filter member for forming a third liquid chamber between the first liquid chamber and the rubber wall is provided, and means for correcting the Ft curve to a sine wave curve is adopted. However, this increases the number of parts by the amount of the filter member.

これに対して、本発明の上記の構成によれば、ゴム壁に連結したアクチュエータの軸部材を可動子の少なくとも一部として、その外側方に配した固定子に備えるコイルに電流を流して該コイルを励磁することにより往動及び復動のいずれの行程も電気的に駆動するように構成してあるから、図６に示すように、前記力Ｆの立ち上がりの遅れをなくすることができる。一例としてコイルに正弦波交流を流せば、Ｆ−ｔ曲線を、正弦波交流の電流−時間の関係を表す正弦波曲線に対応した正弦波曲線にすることができる。従って、Ｆ−ｔ曲線を正弦波曲線にするための補正手段としての第３液室を設けなくてもよく、フィルター部材が不要になって部品点数の増加を抑制することができる。 On the other hand, according to the above configuration of the present invention, the shaft member of the actuator connected to the rubber wall is used as at least a part of the mover, and an electric current is passed through the coil provided in the stator disposed on the outer side of the mover. Since both the forward and backward strokes are electrically driven by exciting the coil, the delay of the rising of the force F can be eliminated as shown in FIG. As an example, when a sine wave alternating current is passed through the coil, the Ft curve can be made into a sine wave curve corresponding to a sine wave curve representing the current-time relationship of the sine wave alternating current. Therefore, it is not necessary to provide the third liquid chamber as a correction means for making the Ft curve into a sine wave curve, and the filter member becomes unnecessary and the increase in the number of parts can be suppressed.

そして、本発明においては、前記第２取付具の内部において、前記ゴム壁の前記第１液室側とは反対側にダイヤフラムを配して第２液室を形成し、さらに前記ゴム壁の外周部に加硫接着したオリフィス形成金具により前記第１液室と第２液室を連通させるオリフィスを形成しているので、前記ダイヤフラムを外部に露出させずに前記第２液室をコンパクトに且つ簡単に構成できるとともに、前記第１液室と第２液室とを連通させるオリフィス構造も簡略化でき、部品数も少なくでき、小スペース化を図ることができる。しかも、前記オリフィス形成金具及び前記ダイヤフラムの外周をそれぞれ前記第２取付具の内周に対し嵌着固定することにより前記第２液室を構成できるので、装置の組み立て構成も容易になる。 In the present invention, the second liquid chamber is formed by arranging a diaphragm on the opposite side of the rubber wall from the first liquid chamber side in the second fixture, and further, the outer periphery of the rubber wall. Since the orifice forming metal fitting that is vulcanized and bonded to the part forms the orifice that connects the first liquid chamber and the second liquid chamber, the second liquid chamber can be made compact and simple without exposing the diaphragm to the outside. In addition, the orifice structure for communicating the first liquid chamber and the second liquid chamber can be simplified, the number of parts can be reduced, and the space can be reduced. In addition, since the second liquid chamber can be configured by fitting and fixing the outer periphery of the orifice-forming metal fitting and the diaphragm to the inner periphery of the second fixture, the assembly structure of the apparatus is facilitated.

特に、前記第２取付具が、前記加振手段を保持する下部筒金具と、その上端側筒部の内周に圧入固定される上部筒金具とからなり、前記防振基体の下端部外周に加硫接着された筒状補強金具が前記上部筒金具の上部内周に嵌着固定されるとともに、前記ゴム壁の外周部に有する前記オリフィス形成金具及び前記ダイヤフラムの外周部に加硫接着された環状補強金具が、それぞれ前記上部筒金具の下部内周に嵌着固定されて組み付けられるとともに、前記上部筒金具の下部が前記下部筒金具の上部内周に圧入固定されてなる構成とした場合は、前記第２取付具に対して、前記筒状補強金具を嵌着固定し、さらには前記オリフィス形成金具及び前記ダイヤフラム外周部の環状補強金具を嵌着固定することにより、前記第１液室、第２液室及びオリフィス等を含む装置本体部分を容易に組み立て構成できる。そのため、例えば、これらの装置本体部分を加振手段とは別に組み立て構成して、液体を封入し、その後に、加振手段を保持する前記第２取付具の下部筒金具と前記上部筒金具とを圧入固定して装置全体を組み立てて製造することも可能になる。 In particular, the second fixture is composed of a lower cylindrical bracket that holds the vibration means and an upper cylindrical bracket that is press-fitted and fixed to the inner periphery of the upper end side cylindrical portion. A vulcanized and bonded cylindrical reinforcing metal fitting was fitted and fixed to the upper inner circumference of the upper cylindrical metal fitting, and was also vulcanized and bonded to the outer circumference of the orifice forming metal fitting and the diaphragm on the outer circumference of the rubber wall. When the annular reinforcing metal fittings are respectively fitted and fixed to the lower inner circumference of the upper cylindrical metal fitting, and the lower part of the upper cylindrical metal fitting is press-fitted and fixed to the upper inner circumference of the lower cylindrical metal fitting. The first liquid chamber is fixed by fitting and fixing the cylindrical reinforcing metal fitting to the second fixture, and further fitting and fixing the orifice forming metal fitting and the annular reinforcing metal fitting on the outer peripheral portion of the diaphragm. Second liquid chamber and orientation The device body portion including an office or the like can be easily assembled construction. Therefore, for example, these apparatus main body portions are assembled and configured separately from the vibration means, and the liquid is sealed, and then the lower cylindrical metal fitting and the upper cylindrical metal fitting of the second fixture holding the vibration means are provided. It is possible to assemble and manufacture the entire apparatus by press-fitting and fixing.

前記上部筒金具の内周面にシール用ゴム層が加硫接着されており、前記防振基体外周部の筒状補強金具、前記ゴム壁外周部のオリフィス形成金具及び前記ダイヤフラム外周部の環状補強金具が、それぞれ前記上部筒金具の内周に前記シール用ゴム層を介して液密に嵌着固定されてなる場合、前記オリフィス形成金具及び前記ダイヤフラム及びを確実にかつシール性よく固定できる。 A rubber layer for sealing is vulcanized and bonded to the inner peripheral surface of the upper cylindrical metal fitting, and the cylindrical reinforcing metal fitting on the outer peripheral portion of the vibration isolating base, the orifice forming metal fitting on the outer peripheral portion of the rubber wall, and the annular reinforcement on the outer peripheral portion of the diaphragm When the metal fittings are fixed in a liquid-tight manner on the inner circumference of the upper cylindrical metal fittings via the sealing rubber layer, the orifice-forming metal fittings and the diaphragm can be fixed securely and with good sealing properties.

前記オリフィス形成金具は、外方に向かって開口する周方向の凹溝が上下二段に形成され、上下の凹溝が周方向の一個所で連通せしめられるとともに、上側の凹溝が第１液室に、下側の凹溝が第２液室に連通して、１周以上のオリフィス長を有してなる１周以上のオリフィス長を有するものが好ましい。これにより、前記オリフィス長を長く設定でき、該オリフィスによる振動低減効果を高めることができる。 In the orifice-forming metal fitting, the circumferential groove that opens outward is formed in two upper and lower stages, the upper and lower grooves communicate with each other in one circumferential direction, and the upper groove is the first liquid. It is preferable that the chamber has an orifice length of one or more rounds in which the lower concave groove communicates with the second liquid chamber and has an orifice length of one or more rounds. Thereby, the said orifice length can be set long and the vibration reduction effect by this orifice can be heightened.

前記の鉄心可動形のアクチュエータは、前記軸部材を含む可動子の外方に配された前記固定子が径方向内方に向かって突出する磁極部を有し、該磁極部には、軸方向に隣合って異極をなす少なくとも一対の永久磁石が配されるとともに、該磁極部の周りにコイルが巻回されてなり、該コイル励磁により発生する起磁力と前記各永久磁石のそれぞれの起磁力との組み合わせにより、前記軸部材を往復動させるように構成されてなるものである。 The iron core movable type actuator has a magnetic pole portion that the stator arranged outward of the mover including the shaft member protrudes radially inward, and the magnetic pole portion has an axial direction. At least a pair of permanent magnets having different polarities adjacent to each other, and a coil is wound around the magnetic pole portion, and the magnetomotive force generated by the coil excitation and the respective magnetomotive force of each permanent magnet are The shaft member is configured to reciprocate by a combination with a magnetic force.

具体的には、前記アクチュエータは、前記第２取付具に取り付けた固定子と、前記軸部材の外周に磁性材部を取設してなり、かつ前記固定子に関して軸方向に往復移動可能に該固定子の内空部において支持してなる可動子とを有し、前記固定子には、前記可動子の磁性材部に対向する磁極部に、前記可動子の往復動方向に隣合った状態で前記磁性材部に対向する一対の永久磁石が、互いに異極をなすように前記往復動方向と直交する方向の磁極の並びを逆にして配設され、前記一対の永久磁石を通る磁束を発生可能なコイルが前記磁極部の周りに巻回されてなるものとする。 Specifically, the actuator includes a stator attached to the second fixture, and a magnetic material portion provided on an outer periphery of the shaft member, and is capable of reciprocating in the axial direction with respect to the stator. A mover supported in the inner space of the stator, and the stator is adjacent to the magnetic pole part facing the magnetic material part of the mover in the reciprocating direction of the mover The pair of permanent magnets opposed to the magnetic material portion are arranged with the arrangement of the magnetic poles in the direction orthogonal to the reciprocating direction reversed so that they have different polarities, and the magnetic flux passing through the pair of permanent magnets is A coil that can be generated is wound around the magnetic pole portion.

これにより、前記コイルに正方向の電流（正電流）が流れると、異極をなす一方の永久磁石の起磁力の向きと、コイルの起磁力の向きとが同一になって、両者の起磁力つまりは磁束が合成され、他方の永久磁石の起磁力の向きと、コイルの起磁力の向きとが反対になって、両者の起磁力の磁束が減殺される。またこれにより、可動子における磁性材部及び軸部材に軸心方向一方側向きの力が作用して、軸部材が軸心方向一方側に移動する。また、コイルに逆方向の電流（負電流）が流れると、前記一方の永久磁石の起磁力の向きと、コイルの起磁力の向きとが反対になり、前記他方の永久磁石の起磁力の向きと、コイルの起磁力の向きとが同一になる。これにより、可動子における磁性材部及び軸部材に軸心方向他方側向きの力が作用して軸部材が軸心方向他方側に移動する。 As a result, when a positive current (positive current) flows through the coil, the direction of the magnetomotive force of one of the permanent magnets having a different polarity is the same as the direction of the magnetomotive force of the coil, so That is, the magnetic fluxes are combined, the direction of the magnetomotive force of the other permanent magnet is opposite to the direction of the magnetomotive force of the coil, and the magnetic force of both magnetomotive forces is reduced. Thereby, a force in one axial direction acts on the magnetic material portion and the shaft member in the mover, and the shaft member moves to the one axial side. When a reverse current (negative current) flows through the coil, the direction of the magnetomotive force of the one permanent magnet is opposite to the direction of the magnetomotive force of the coil, and the direction of the magnetomotive force of the other permanent magnet And the direction of the magnetomotive force of the coil is the same. Thereby, the force toward the other axial direction acts on the magnetic material portion and the shaft member in the mover, and the shaft member moves to the other side in the axial direction.

すなわち、前記の軸方向に作用する力は、前記コイルを励磁する電流の向き（正電流と負電流）に応じて正逆方向に発生する。従って、コイルの電流の向きを正逆に交互に変えること、つまりは正負電流の変化により、軸部材を軸心方向に往復動させることができる。 That is, the force acting in the axial direction is generated in forward and reverse directions according to the direction of current (positive current and negative current) exciting the coil. Accordingly, the shaft member can be reciprocated in the axial direction by alternately changing the direction of the coil current in the forward and reverse directions, that is, by changing the positive and negative current.

また、鉄心可動形のアクチュエータであって、コイル励磁による起磁力と、異極をなす各永久磁石それぞれの起磁力との組み合わせによる磁気回路の変化を利用することにより、ムービングマグネット型の場合よりも出力の大きいものが得られる。 Also, it is an iron core movable type actuator that uses the change of the magnetic circuit due to the combination of the magnetomotive force due to coil excitation and the magnetomotive force of each permanent magnet that has a different polarity, than in the moving magnet type. A large output can be obtained.

特に、前記往復動方向に隣合って互いに異極をなす前記一対の永久磁石を、前記往復動方向と直交する方向で前記磁性材部を挟んで対向し、かつ対向する磁極が互いに異極をなすように磁極の並びを逆にして、前記可動子を挟んで対向する前記固定子の各磁極部にそれぞれ配設してなるものであると、より強い起磁力を発生させることができる。これにより、ムービングマグネット型の場合に比して大きな力を得ることができ、小型化を容易に可能にする。 In particular, the pair of permanent magnets adjacent to each other in the reciprocating direction and having different polarities are opposed to each other with the magnetic material portion sandwiched in a direction orthogonal to the reciprocating direction, and the opposing magnetic poles have different polarities. If the arrangement of the magnetic poles is reversed and the magnetic pole portions of the stator are opposed to each other with the mover interposed therebetween, a stronger magnetomotive force can be generated. Thereby, a large force can be obtained as compared with the moving magnet type, and the size can be easily reduced.

本発明によれば、第２取付具の内部において、第１液室の室壁をなすゴム壁を挟んで第２液室を設定でき、しかも第１液室と第２液室を連通させるオリフィスの構成を簡略化でき、組み立て構成が容易で、部品数を削減できて、小スペース化を図ることができ、さらにはアクチュエータの出力を大きくしてしかも小型化できる能動型液封入式防振装置を提供することができる。 According to the present invention, the second liquid chamber can be set inside the second fixture with the rubber wall forming the chamber wall of the first liquid chamber interposed therebetween, and the orifice that allows the first liquid chamber and the second liquid chamber to communicate with each other. The active liquid-filled vibration isolator can simplify the assembly structure, simplify the assembly structure, reduce the number of parts, reduce space, and increase the output of the actuator while reducing the size. Can be provided.

以下、本発明の実施の形態を図面に基づいて説明する。図１に自動車にエンジンマウントとして組付けられる能動型液封入式防振装置（以下、「液封入式防振装置」と称する）を示している。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows an active liquid-filled vibration isolator (hereinafter referred to as a “liquid-filled vibration isolator”) that is assembled in an automobile as an engine mount.

この液封入式防振装置は、エンジンに取付けられる第１取付具１と、車体側のフレームに取付けられる筒状の第２取付具２とをゴム状弾性材から成る防振基体３を介して連結し、第２取付具２内に前記防振基体３と対向して円板状のゴム壁５を設け、前記防振基体３と前記ゴム壁５との間を第１液室４として形成している。この第１液室４は、これとは別に設けた後述のダイヤフラム７が室壁の一部をなす第２液室６とオリフィス８により連通接続せしめられている。 This liquid-filled vibration isolator has a first attachment 1 attached to an engine and a cylindrical second attachment 2 attached to a frame on the vehicle body via an anti-vibration base 3 made of a rubber-like elastic material. Connected, a disk-shaped rubber wall 5 is provided in the second fixture 2 so as to face the vibration isolating base 3, and a space between the vibration isolating base 3 and the rubber wall 5 is formed as a first liquid chamber 4. doing. The first liquid chamber 4 is connected to a second liquid chamber 6 which forms a part of the chamber wall by a diaphragm 7 which is provided separately from the first liquid chamber 4 and an orifice 8.

そして、前記第１液室４の室壁の一部をなす前記ゴム壁５には、加振手段としての鉄心可動形の電磁石式のリニアアクチュエータ９（以下、「アクチュエータ９」と称する）が前記第１液室４とは反対側から連結されており、前記ゴム壁５を加振変位させることにより第１液室４の圧力を制御するように設けられている。前記アクチュエータ９は、後述のように前記第２取付具２に固定されて設けられる。 The rubber wall 5 forming a part of the chamber wall of the first liquid chamber 4 is provided with an iron core movable type electromagnet type linear actuator 9 (hereinafter referred to as “actuator 9”) as a vibration means. It is connected from the opposite side to the first liquid chamber 4 and is provided so as to control the pressure of the first liquid chamber 4 by oscillating and displacing the rubber wall 5. The actuator 9 is fixed to the second fixture 2 as will be described later.

前記第１取付具１は、上下方向の略中央部に外方へ張り出したフランジ１ａを有し、該フランジ１ａの上面にまで前記防振基体３と一体のゴム層３ａが加硫接着手段により装設されている。前記第１取付具１には、その軸心部に上方に開口するねじ孔１ｂを有し、該ねじ孔１ｂに連結ボルト（図示せず）が螺合されることによりエンジンに連結されるようになっている。なお、前記第１取付具１の前記フランジ１ａの上にストッパ金具を装着する場合もある。 The first fixture 1 has a flange 1a projecting outward at a substantially central portion in the vertical direction, and a rubber layer 3a integral with the vibration-proof base 3 is formed on the upper surface of the flange 1a by a vulcanizing adhesive means. It is installed. The first fixture 1 has a screw hole 1b that opens upward in its axial center, and a connection bolt (not shown) is screwed into the screw hole 1b so as to be connected to the engine. It has become. A stopper fitting may be mounted on the flange 1a of the first fixture 1 in some cases.

前記第２取付具２は下部筒金具２１と上部筒金具２２とからなる。前記下部筒金具２１は、前記の加振手段である前記アクチュエータ９を保持する下部側筒部２１ａに傾斜部を介して径大の上端側筒部２１ｂが連続して形成されており、この上端側筒部２１ｂに前記上部筒金具２２の下部が圧入固定されている。そして、前記上部筒金具２２の内方において、後述のように前記第１液室４、第２液室６及びオリフィス８等が組み込み構成されている。 The second fixture 2 is composed of a lower tubular fitting 21 and an upper tubular fitting 22. The lower cylindrical fitting 21 is formed by continuously forming a large-diameter upper-end-side cylinder portion 21b via an inclined portion on a lower-side cylinder portion 21a that holds the actuator 9 serving as the vibration means. The lower part of the upper cylinder fitting 22 is press-fitted and fixed to the side cylinder part 21b. The first liquid chamber 4, the second liquid chamber 6, the orifice 8, and the like are incorporated in the inside of the upper cylindrical metal member 22 as will be described later.

前記防振基体３は、底部側（下面側）が中空の円錐台形状に形成されてなり、その上端部に前記第１取付具１が下部側を埋設した状態に加硫接着されている。 The anti-vibration base 3 is formed in the shape of a circular truncated cone on the bottom side (lower surface side), and the first fixture 1 is vulcanized and bonded to the upper end of the anti-vibration base 3 so that the lower side is embedded.

前記防振基体３の下端部の外周には、前記防振基体３の下端部外周に筒状補強金具１０が加硫接着されており、この筒状補強金具１０の内周下端まで前記防振基体３の下端周縁部３ｂが延設されている。そして、前記筒状補強金具１０が前記上部筒金具２２の上部２２ａの内周に嵌着されるとともに、前記上部筒金具２２の上端部２２ｂが内側に折曲されかしめ固定されている。 A cylindrical reinforcing bracket 10 is vulcanized and bonded to the outer periphery of the lower end portion of the vibration isolating base 3 on the outer periphery of the lower end portion of the vibration isolating base 3. A lower end peripheral portion 3b of the base 3 is extended. And the said cylindrical reinforcement metal fitting 10 is fitted by the inner periphery of the upper part 22a of the said upper cylinder metal fitting 22, and the upper end part 22b of the said upper cylinder metal fitting 22 is bent inside, and is fixed by crimping.

また、前記ゴム壁５の外周部には、径方向外側に向かって開口した周方向の凹溝状を有する断面略Ｃ形をなす環状のオリフィス形成金具１１が加硫接着されている。このオリフィス形成金具１１の上面及び下面には前記ゴム壁５と一体の薄いゴム層５ａ，５ｂが設けられている。このオリフィス形成金具１１は、前記上部筒金具２２の前記上部２２ａよりやや径大の下部２２ｃの内周に液密に嵌着固定されて一体的に組み付けられている。この組み付け状態において、前記オリフィス形成金具１１の部分の上面に、前記筒状補強金具１０の下端及び防振基体３の下端周縁部３ｂがシール状態を保持するように当接せしめられている。これにより、前記ゴム壁５と防振基体３との間が前記第１液室４として形成されている。 Further, an annular orifice forming metal fitting 11 having a substantially C-shaped cross section having a groove shape in the circumferential direction opened toward the radially outer side is vulcanized and bonded to the outer peripheral portion of the rubber wall 5. Thin rubber layers 5 a and 5 b integrated with the rubber wall 5 are provided on the upper and lower surfaces of the orifice forming metal fitting 11. The orifice-forming metal fitting 11 is liquid-tightly fitted and fixed integrally to the inner periphery of the lower part 22c having a diameter slightly larger than the upper part 22a of the upper cylindrical metal part 22. In this assembled state, the lower end of the cylindrical reinforcing bracket 10 and the lower peripheral edge 3b of the vibration-proof base 3 are brought into contact with the upper surface of the orifice-forming bracket 11 so as to maintain a sealed state. Thereby, a space between the rubber wall 5 and the vibration isolating base 3 is formed as the first liquid chamber 4.

さらに、前記上部筒金具２２内の下部には、前記ゴム壁５の前記第１液室４側とは反対側に対向してゴム状弾性材りなるダイヤフラム７が配されている。このダイヤフラム７の外周部７１には環状補強金具１４が加硫接着されており、該環状補強金具７１が前記オリフィス形成金具１１の下面に接した状態で前記上部筒金具２２の下部２２ｃの内周に液密に嵌着固定されて一体的に組み付けられている。図の場合は、前記嵌着後に前記上部筒金具２２の下端部２２ｄが内側に曲げられており、前記オリフィス形成金具１１及び前記外周部７１が容易に抜脱しないように保持されている。 Furthermore, a diaphragm 7 made of a rubber-like elastic material is disposed at the lower part of the upper cylindrical metal fitting 22 so as to face the opposite side of the rubber wall 5 from the first liquid chamber 4 side. An annular reinforcing bracket 14 is vulcanized and bonded to the outer peripheral portion 71 of the diaphragm 7, and the inner periphery of the lower portion 22 c of the upper cylindrical bracket 22 with the annular reinforcing bracket 71 in contact with the lower surface of the orifice forming bracket 11. It is fixed in a liquid-tight manner and assembled together. In the case of the figure, the lower end portion 22d of the upper tubular fitting 22 is bent inward after the fitting, and the orifice forming fitting 11 and the outer peripheral portion 71 are held so as not to be easily removed.

特に、前記上部筒金具２２の内周面には、シール用ゴム層１２が加硫接着されており、前記防振基体３外周部の筒状補強金具１０、前記ゴム壁５外周部のオリフィス形成金具１１及び前記ダイヤフラム外周部７１の環状補強金具１４が、それぞれ前記上部筒金具２２の内周に前記シール用ゴム層１２を介して液密に嵌着固定されている。 In particular, a rubber layer 12 for sealing is vulcanized and bonded to the inner peripheral surface of the upper cylindrical metal fitting 22 to form a cylindrical reinforcing metal fitting 10 on the outer peripheral portion of the vibration-isolating base 3 and an orifice on the outer peripheral portion of the rubber wall 5. The annular reinforcing metal fittings 14 of the metal fitting 11 and the diaphragm outer peripheral portion 71 are fitted and fixed to the inner circumference of the upper cylindrical metal fitting 22 via the sealing rubber layer 12 respectively.

このように組み付けられることにより、前記ゴム壁５とダイヤフラム７との間が前記第１液室４とは別の第２液室６として形成され、さらに前記オリフィス形成金具１１の凹溝部分が周方向に延びるオリフィス８として形成され、前記第２液室６と前記第１液室１とが連通接続せしめられている。８ａ，８ｂはそれぞれ前記第１液室４及び前記第２液室６との連通部である。 By being assembled in this way, the space between the rubber wall 5 and the diaphragm 7 is formed as a second liquid chamber 6 different from the first liquid chamber 4, and the groove portion of the orifice forming metal fitting 11 is surrounded by a circumferential portion. It is formed as an orifice 8 extending in the direction, and the second liquid chamber 6 and the first liquid chamber 1 are connected in communication. Reference numerals 8 a and 8 b denote communication portions with the first liquid chamber 4 and the second liquid chamber 6, respectively.

そして、前記の組み付け状態において、前記上部筒金具２２の下部が、前記第２取付具２の下部筒金具２１の上端側筒部２１ｂに圧入固定されて組み立てられている。 In the assembled state, the lower portion of the upper tubular fitting 22 is assembled by being press-fitted and fixed to the upper end side tubular portion 21 b of the lower tubular fitting 21 of the second fixture 2.

前記下部筒金具２１の下部側筒部２１ａの外周部には、支持ブラケット１９が溶接手段等により固着され、該支持ブラケット１９の下面に一体に底板２３が連設されるとともに、車体側のフレームに連結するための複数の連結ボルト２０が固着されている。前記底板２３は、内方部の領域が上方向きの凸状をなし、該領域部分で前記アクチュエータ９を受支できるように設けられている。２３ａは前記凸状部分を示す。 A support bracket 19 is fixed to the outer peripheral portion of the lower cylinder portion 21a of the lower cylinder fitting 21 by welding means or the like, and a bottom plate 23 is integrally provided on the lower surface of the support bracket 19, and a frame on the vehicle body side. A plurality of connecting bolts 20 are connected to each other. The bottom plate 23 is provided so that the inner region has an upward convex shape, and the actuator 9 can be supported by the region. Reference numeral 23a denotes the convex portion.

前記のゴム壁５の加振手段である鉄心可動形の電磁石式のアクチュエータ９は、固定子に関して軸方向に往復移動可能な可動子の少なくとも一部を構成する軸部材２７を有してなり、該軸部材２７が縦姿勢に設定されるとともに、該軸部材２７の上端側（先端側）が前記ダイヤフラム７を気密に貫通した状態で円板状に張り出し形成した頭部２６が前記ゴム壁５の中央部に埋設・連結されている。 The iron core movable electromagnet actuator 9 which is the vibration means of the rubber wall 5 has a shaft member 27 constituting at least a part of a mover that can reciprocate in the axial direction with respect to the stator. The shaft member 27 is set in a vertical posture, and a head portion 26 that is formed in a disk shape with the upper end side (tip end side) of the shaft member 27 penetrating the diaphragm 7 in an airtight manner is formed on the rubber wall 5. It is buried and connected to the central part.

図の場合、前記軸部材２７は、前記ゴム壁５に加硫接着された頭部２６の部分と、前記ダイヤフラム７の中央部に上端外周部が気密状態を保持するように加硫接着された本体部分２７ａとからなり、前記頭部２６の部分の中央部と前記本体部分２７ａの上端部とが、図のような凹凸嵌合やネジ締結等の手段により結合されている。この頭部２６と本体部分２７ａの結合は、前記上部筒金具２２に対する前記ゴム壁５及びダイヤフラム７の組み込みと同時または組み込み前のいずれの時点で行ってもよい。また、前記ゴム壁５及び前記ダイヤフラム７のそれぞれの加硫成形時には、前記頭部２６及び本体部分２７ａのみを加硫成形すればよい。 In the case of the figure, the shaft member 27 is vulcanized and bonded to the portion of the head portion 26 vulcanized and bonded to the rubber wall 5 and to the central portion of the diaphragm 7 so that the outer peripheral portion of the upper end is kept airtight. It consists of a main body portion 27a, and the central portion of the head portion 26 and the upper end portion of the main body portion 27a are joined together by means such as concave-convex fitting and screw fastening as shown in the figure. The head portion 26 and the main body portion 27a may be joined at the same time as or before the rubber wall 5 and the diaphragm 7 are assembled into the upper cylindrical fitting 22. Further, at the time of vulcanization molding of the rubber wall 5 and the diaphragm 7, only the head portion 26 and the main body portion 27a may be vulcanized.

こうして、後述のように可動子の外方に配された固定子に備えるコイルを励磁することにより、可動子つまりは前記軸部材２７を往動と復動のいずれの行程も電気的に駆動させるように該アクチュエータ９が構成されている。次に、このアクチュエータ９の構造・作用等について詳しく説明する。 In this way, as will be described later, by exciting the coil provided in the stator arranged outside the mover, the mover, that is, the shaft member 27 is electrically driven in both the forward and backward strokes. The actuator 9 is configured as described above. Next, the structure and operation of the actuator 9 will be described in detail.

前記アクチュエータ９は、前記第２取付具２に取り付けた固定子２８と、該固定子２８に関して軸方向に往復動可能に前記固定子２８の内空部（軸心部）において支持した可動子３０とを有してなる。 The actuator 9 includes a stator 28 attached to the second fixture 2 and a mover 30 supported in an inner space (axial part) of the stator 28 so as to be capable of reciprocating in the axial direction with respect to the stator 28. It has.

前記固定子２８は、可動子３０の外方にあって、電磁鋼板等の磁性金属よりなる多数の環状（主に角形環状）の金属板を積層して成るヨーク２８ａと、該ヨーク２８ａの軸心方向の中央部において前記可動子３０を挟んで相対向するように両側より径方向内方に向かって突出する磁極部２９，２９を有してなる。 The stator 28 is located outside the mover 30 and has a yoke 28a formed by laminating a large number of annular (mainly rectangular annular) metal plates made of a magnetic metal such as an electromagnetic steel plate, and a shaft of the yoke 28a. Magnetic pole portions 29, 29 projecting radially inward from both sides so as to face each other with the mover 30 in between in the central portion in the center direction.

前記可動子３０は、基本的に、前記軸部材２７を中心にして、その軸心方向中間部に、前記同様の磁性金属よりなる多数の金属円板を積層してなる可動子鉄心としての磁性材部３０ａが固着されてなるものである。 The mover 30 basically has a magnetic core as a mover core formed by laminating a number of metal disks made of the same magnetic metal at the center in the axial direction with the shaft member 27 at the center. The material part 30a is fixed.

図示する実施例の場合は、前記軸部材２７に嵌合されるパイプ部材３７に前記磁性材部３０ａが固着され、該パイプ部材３７が前記軸部材２７の外周に嵌合されて固定されている。この固定手段として、前記軸部材２７は、その本体部分２７ａが略全長にわたって外周にねじを有するものよりなり、この本体部分２７ａに対して、前記ダイヤフラム７に近い上端側の位置決め用のナット３６が螺合されるとともに、その下方部に、前記パイプ部材３７と共に、後述する支持用の上下一対の板バネ３５，３５、及びこれを前記パイプ部材３７との間に挟着する一対の短パイプ３８，３８が嵌合され、さらに前記本体部分２７ａの端部に締め付け用の前記ナット３９が螺合されて締付けられることにより固定されている。 In the illustrated embodiment, the magnetic material portion 30a is fixed to a pipe member 37 fitted to the shaft member 27, and the pipe member 37 is fitted and fixed to the outer periphery of the shaft member 27. . As the fixing means, the shaft member 27 has a body portion 27a having a screw on the outer periphery over substantially the entire length, and a positioning nut 36 on the upper end side near the diaphragm 7 with respect to the body portion 27a. A pair of upper and lower leaf springs 35 and 35 for support, which will be described later, and a pair of short pipes 38 sandwiched between the pipe member 37 and the upper and lower plate springs 35 to be described later, and the pipe member 37 are screwed together. 38, and the nut 39 for fastening is screwed onto the end of the main body portion 27a and fastened.

このような構成を採用することにより、前記第２取付具２の上部筒金具２２に対し膨振基体３、ゴム壁５、ダイヤフラム７を組み付け、内部に液体を充填するまでは、前記可動子３０の軸部材２７の頭部２６と本体部分２７ａのみを前記ゴム壁５及びダイヤフラム７に結合した状態にしておき、この組み付け及び液体充填後に、前記軸部材２７に対し、前記板バネ３５，３５および前記磁性材部３０ａを嵌合固着する。 By adopting such a configuration, the movable element 30 is assembled until the expansion base 3, the rubber wall 5, and the diaphragm 7 are assembled to the upper cylindrical fitting 22 of the second fixture 2 and the liquid is filled therein. Only the head portion 26 and the main body portion 27a of the shaft member 27 are connected to the rubber wall 5 and the diaphragm 7, and after the assembly and liquid filling, the plate springs 35, 35 and The magnetic material portion 30a is fitted and fixed.

そして、組立構成された可動子３０は、第２取付具２の上部筒金具２２を前記下部筒金具２１の上端側筒部２１ｃに圧入する際に、前記下部筒金具２１の下部側筒部２１ａ内に保持される固定子２８の内空部に挿入され、前記板バネ３５，３５を介して前記固定子２８に上下方向（軸部材２７の軸心方向）に往復動可能に連結されて支持される。 The assembled mover 30 is configured such that when the upper cylindrical fitting 22 of the second fixture 2 is press-fitted into the upper cylindrical portion 21c of the lower cylindrical fitting 21, the lower cylindrical portion 21a of the lower cylindrical fitting 21 is inserted. It is inserted into the inner space of the stator 28 held inside, and is connected to the stator 28 via the leaf springs 35, 35 so as to be able to reciprocate in the vertical direction (axial direction of the shaft member 27). Is done.

前記一対の板バネ３５，３５は、後述のコイル部分を迂回するように一部が内方へくびれた角形の変形リング状に形成され、前記磁性材部３０ａの上下に間隔を保有して位置している。そして、各板バネ３５は、その内周側端部が前記のようにパイプ部材３７と短パイプ３８，３８との間に挟着されるとともに、その外周側端部が前記固定子２８の外周部において上下支持部材４０，４１を、ヨーク２８ａを挟んで締結固定するボルト４２による締結部分に共に固定され、弾性変形可能に支持されている。 The pair of leaf springs 35, 35 are formed in a rectangular deformed ring shape that is partially constricted inward so as to bypass a coil portion to be described later, and are located at intervals above and below the magnetic material portion 30 a. doing. Each leaf spring 35 has its inner circumferential end sandwiched between the pipe member 37 and the short pipes 38 and 38 as described above, and its outer circumferential end is the outer periphery of the stator 28. The upper and lower support members 40 and 41 are fixed together at a fastening portion by a bolt 42 that is fastened and fixed with the yoke 28a interposed therebetween, and are supported so as to be elastically deformable.

そして前記固定子２８が第２取付具２の下部筒金具２１の下部側筒部２１ａに圧入されて前記底板２３上に保持されている。前記上下支持部材４０，４１の中央部には、前記位置決め用ナット３６及び締め付け用ナット３９が通り抜けできる開口４０ａ，４１ａが設けられており、さらに前記底板２３の凸状部分２３ａの中央部にも、前記両ナット３６，３９が通り抜けできる開口１７が形成されている。これにより、前記可動子３０の部分が問題なく上下動できるようになっている。 The stator 28 is press-fitted into the lower cylindrical portion 21 a of the lower cylindrical fitting 21 of the second fixture 2 and is held on the bottom plate 23. Openings 40a and 41a through which the positioning nut 36 and the tightening nut 39 can pass are provided at the center of the upper and lower support members 40 and 41, and also at the center of the convex portion 23a of the bottom plate 23. An opening 17 through which the nuts 36 and 39 can pass is formed. Thereby, the part of the said needle | mover 30 can be moved up and down without a problem.

図２〜図５にも示すように、前記可動子３０の磁性材部３０ａに対向する前記固定子２８の磁極部２９，２９の先端つまり内端には、前記可動子３０の往復動方向（上下方向）に隣合った状態で並んで前記磁性材部３０ａに対向する上下一対の円弧板状をなす永久磁石３１，３２を、それらの磁極が互いにＮＳ交互の異極をなすように、前記往復移動方向と直交する方向（左右方向）に磁極を並べて、かつ互いの磁極（Ｎ極とＳ極）の並びが逆になる状態に配設している。なお、上側の永久磁石３１の上端から下側の永久磁石３２の下端までの長さは、前記磁性材部３０ａの上下方向（軸心方向）の長さよりも長くなっている。 As shown also in FIGS. 2 to 5, the reciprocating direction of the mover 30 (the inner end of the magnetic pole part 29, 29 of the stator 28 facing the magnetic material part 30 a of the mover 30) The permanent magnets 31 and 32 forming a pair of upper and lower circular arc plates facing each other in the state of being adjacent to each other in the vertical direction) so that their magnetic poles have NS different polarities. The magnetic poles are arranged in a direction (left-right direction) orthogonal to the reciprocating direction, and the arrangement of the magnetic poles (N pole and S pole) is reversed. Note that the length from the upper end of the upper permanent magnet 31 to the lower end of the lower permanent magnet 32 is longer than the length of the magnetic material portion 30a in the vertical direction (axial direction).

そして、前記固定子２８の磁極部２９には、コイル３３を前記往復動方向と直交する方向（左右方向）の軸心周りに巻回して、前記一対の永久磁石３１，３２を通る磁束を発生可能に構成してある。 A coil 33 is wound around an axis in a direction (left-right direction) orthogonal to the reciprocating direction at the magnetic pole portion 29 of the stator 28 to generate a magnetic flux passing through the pair of permanent magnets 31 and 32. It is configured to be possible.

図の場合は、前記一対の永久磁石３１，３２から成る磁石部３４を、前記可動子３０を挟んで対向する前記固定子２８の二つの磁極部２９，２９の内端部にそれぞれ設けており、両磁極部２９，２９それぞれの磁石部３４，３４の永久磁石３１，３２は、前記往復移動方向と直交する方向で前記磁性材部３０ａを挟んで対向するとともに、この対向する磁極が互いに異極をなすように磁極の並びを左右で逆にして配設している。これに対応して、前記コイル３３についても、それぞれが各磁石部３４の左右外方側に位置する状態で前記磁極部２９，２９に巻回されて配置されている。４３は前記コイル３３を保持するスプール部材である。 In the case of the figure, a magnet portion 34 composed of the pair of permanent magnets 31 and 32 is provided at inner end portions of two magnetic pole portions 29 and 29 of the stator 28 facing each other with the mover 30 interposed therebetween. The permanent magnets 31 and 32 of the magnet portions 34 and 34 of the magnetic pole portions 29 and 29 are opposed to each other with the magnetic material portion 30a interposed therebetween in a direction orthogonal to the reciprocating direction, and the opposing magnetic poles are different from each other. The arrangement of the magnetic poles is reversed from left to right so as to form a pole. Correspondingly, the coils 33 are also wound around the magnetic pole portions 29 and 29 in a state where the coils 33 are positioned on the left and right outer sides of the respective magnet portions 34. A spool member 43 holds the coil 33.

図２，図４に示すように、前記一対のコイル３３，３３は互いに接続されている。図２，図３に示すように、右側の上下一対の永久磁石３１，３２のうち上側の永久磁石３１は、磁性材部３０ａと対向する面側がＮ極、反対面側がＳ極であり、下側の永久磁石３２は、磁性材部３０ａと対向する面側がＳ極、反対面側がＮ極である。左側の一対の永久磁石３１，３２のうち上側の永久磁石３１は、磁性材部３０ａと対向する面側がＳ極、反対側がＮ極であり、下側の永久磁石３２は、磁性材部３０ａと対向する面側がＮ極、反対側がＳ極である。図２および図３において、白抜きの左右方向を向いた矢印は永久磁石３１，３２の起磁力の向きを表す。この起磁力は上側では左側を向き、下側では右側を向いている。 As shown in FIGS. 2 and 4, the pair of coils 33 and 33 are connected to each other. As shown in FIGS. 2 and 3, the upper permanent magnet 31 of the pair of upper and lower permanent magnets 31 and 32 on the right side has an N pole on the side facing the magnetic material portion 30a and an S pole on the opposite side. The side permanent magnet 32 has an S pole on the side facing the magnetic material portion 30a and an N pole on the opposite side. Of the pair of left permanent magnets 31, 32, the upper permanent magnet 31 has an S pole on the surface facing the magnetic material portion 30a and an N pole on the opposite side, and the lower permanent magnet 32 has a magnetic material portion 30a. The opposite side is the N pole and the opposite side is the S pole. 2 and 3, the white arrows pointing in the left-right direction indicate the direction of the magnetomotive force of the permanent magnets 31 and 32. The magnetomotive force is directed to the left side at the upper side and to the right side at the lower side.

上記の構造により、図３に示すように、コイル３３に正方向の電流が流れると、上側の永久磁石３１の起磁力の向きと、コイル３３の起磁力の向き（図３の矢印）とが同一になって、磁石の磁束が合成されて起磁力が強まり、他方、下側の永久磁石３２の起磁力の向きと、コイル３３の起磁力の向きとが反対になって、両者の起磁力が相殺されて弱まる。その結果、前記可動子３０の磁性材部３０ａ及び軸部材２７に上向きの力（白抜きの矢印で示してある）が作用して、該軸部材２７が上昇する。 With the above structure, as shown in FIG. 3, when a positive current flows through the coil 33, the direction of the magnetomotive force of the upper permanent magnet 31 and the direction of the magnetomotive force of the coil 33 (arrows in FIG. 3) The magnetic fluxes of the magnets are combined to increase the magnetomotive force. On the other hand, the direction of the magnetomotive force of the lower permanent magnet 32 and the direction of the magnetomotive force of the coil 33 are opposite to each other. Is offset and weakens. As a result, an upward force (indicated by a white arrow) acts on the magnetic material portion 30a and the shaft member 27 of the mover 30, and the shaft member 27 rises.

また、図５に示すように、コイル３３に逆方向の電流（負電流）が流れると、前記とは反対に、上側の永久磁石３１の起磁力の向きと、コイル３３の起磁力の向きとが反対になって磁束が相殺され起磁力が弱まるとともに、下側の永久磁石３２の起磁力の向きと、コイル３３の起磁力の向きとが同一になって、この下側で磁石の磁束が合成されて起磁力が強まる。これにより、前記可動子３０の磁性材部３０ａ及び軸部材２７に下向きの力（白抜きの矢印で示してある）が作用して、該軸部材２７が下降する。そして、前記コイル３３の電流の向きが正逆に交互に変わることで、軸部材２７が上下に往復動する。 Further, as shown in FIG. 5, when a current (negative current) in the reverse direction flows through the coil 33, the direction of the magnetomotive force of the upper permanent magnet 31 and the direction of the magnetomotive force of the coil 33 are reversed. The magnetic flux is canceled and the magnetomotive force is weakened, and the direction of the magnetomotive force of the lower permanent magnet 32 and the direction of the magnetomotive force of the coil 33 are the same. Combined to increase magnetomotive force. Thereby, a downward force (indicated by a white arrow) acts on the magnetic material portion 30a and the shaft member 27 of the mover 30, and the shaft member 27 is lowered. Then, the direction of the current of the coil 33 alternately changes forward and reverse, whereby the shaft member 27 reciprocates up and down.

前記アクチュエータ９を上記のように往動行程と復動行程のいずれの行程も電気的に駆動させるから、コイル３３に正弦波交流を流すことで、前記可動子３０の軸部材２７を交流電流の向きの変化に対応させて上下に往復動させることができる。特に、互いに異極をなす一対の永久磁石３１，３２のそれぞれの起磁力の向きと、コイル３３に生じる起磁力との組み合わせにより、比較的コンパクトな装置でありながら、ムービングマグネット型の場合よりも出力の大きいものが得られるので、軸部材２７を確実に強い力で往復動させることができ、第１液室４の圧力制御を確実になすことができる。 Since the actuator 9 is electrically driven in both the forward stroke and the backward stroke as described above, by passing a sine wave alternating current through the coil 33, the shaft member 27 of the movable element 30 is made to have an alternating current. It can be reciprocated up and down corresponding to the change in direction. In particular, the combination of the direction of the magnetomotive force of each of the pair of permanent magnets 31 and 32 having different polarities and the magnetomotive force generated in the coil 33 is a relatively compact device, but more than a moving magnet type. Since a large output is obtained, the shaft member 27 can be reliably reciprocated with a strong force, and the pressure control of the first liquid chamber 4 can be reliably performed.

そして、図６に示すように、前記アクチュエータ９の駆動によって液封入式防振装置に作用する力Ｆ［Ｎ］と時間ｔ［ｓ］との関係を示すＦ−ｔ曲線を、正弦波交流の電流−時間の関係を表す正弦波曲線に対応した正弦波曲線にすることができる。 Then, as shown in FIG. 6, an Ft curve showing the relationship between the force F [N] acting on the liquid-filled vibration isolator by the driving of the actuator 9 and the time t [s] is expressed as a sinusoidal alternating current. A sinusoidal curve corresponding to the sinusoidal curve representing the current-time relationship can be obtained.

図８及び図９は、本発明の能動型液封入式防振装置の一部の変更例を示し、基本的に上記した実施例と同様の構成をなしている。同じ構成部分及び部材には同符号を付してその詳しい説明を省略する。 FIGS. 8 and 9 show some modified examples of the active liquid-filled vibration isolator of the present invention, and basically have the same configuration as the above-described embodiment. The same components and members are denoted by the same reference numerals, and detailed description thereof is omitted.

この実施例における上記の実施例と相違する点について説明する。この実施例において、前記第１液室４と前記第２液室６との間を仕切るゴム壁５の外周に加硫接着されたオリフィス形成金具１１は、外方に向かって開口する周方向の凹溝が上下二段に形成されており、図９のように、上下の凹溝１１ａ，１１ｂが周方向の一個所で連通口８ｃにより連通せしめられるとともに、上側の凹溝１１ａが連通部８ａにより第１液室４に、下側の凹溝１１ｂが連通部８ｂにより第２液室６に連通せしめられ、１周以上のオリフィス長を形成できるようになっている。これにより、前記オリフィス８の全長を長く設定でき、該オリフィス８による振動低減効果を高めることができる。なお、前記オリフィス形成金具１１の上面にゴム壁５と一体のゴム層５ａが設けられているが、下面のゴム層は省略されている。 The difference in this embodiment from the above embodiment will be described. In this embodiment, the orifice forming metal fitting 11 vulcanized and bonded to the outer periphery of the rubber wall 5 partitioning between the first liquid chamber 4 and the second liquid chamber 6 is a circumferential direction opening outward. As shown in FIG. 9, the upper and lower concave grooves 11a and 11b are communicated with each other at one place in the circumferential direction by the communication port 8c, and the upper concave groove 11a is communicated with the communicating portion 8a. As a result, the lower groove 11b is communicated with the first liquid chamber 4 and the second liquid chamber 6 is communicated with the second liquid chamber 6 through the communication portion 8b, so that an orifice length of one or more rounds can be formed. Thereby, the full length of the orifice 8 can be set long, and the vibration reduction effect by the orifice 8 can be enhanced. A rubber layer 5a integrated with the rubber wall 5 is provided on the upper surface of the orifice-forming metal fitting 11, but the rubber layer on the lower surface is omitted.

また、この実施例のアクチュエータ９についても、基本的に上記した実施例と同様であり、前記軸部材２７に嵌合されるパイプ部材３７に前記磁性材部３０ａが固着され、該パイプ部材３７が前記軸部材２７の外周に嵌合されて固定されている。この固定手段として、前記軸部材２７の本体部分２７ａにおける位置決め用のナット３６を嵌合して上部側の段部に係合させるとともに、その下方部に、前記パイプ部材３７とともに、後述する支持用の上下一対の板バネ３５，３５、及びこれを前記パイプ部材３７との間に挟着するための一対の短パイプ３８，３８を嵌合し、さらに前記本体部分２７ａの端部に締め付け用の前記ナット３９を螺合して締付けることにより固定している。 The actuator 9 of this embodiment is basically the same as that of the above-described embodiment, and the magnetic material portion 30a is fixed to the pipe member 37 fitted to the shaft member 27, and the pipe member 37 is The shaft member 27 is fitted and fixed to the outer periphery. As the fixing means, a positioning nut 36 in the main body portion 27a of the shaft member 27 is fitted and engaged with the upper stepped portion, and the lower portion thereof together with the pipe member 37 is used for supporting described later. A pair of upper and lower leaf springs 35 and 35 and a pair of short pipes 38 and 38 for sandwiching the leaf springs 35 and 35 between the upper and lower plate springs 37 and 38 are fitted, and further tightened to the end of the main body portion 27a. The nut 39 is fixed by screwing and tightening.

これにより、前記第２取付具２の上部筒金具２２に対し膨振基体３、ゴム壁５、ダイヤフラム７を組み付けるとともに内部に液体を充填した後、前記軸部材２７に対して、前記位置決め用ナット３６、磁性材部３０ａを固着した前記パイプ部材３７、前記板バネ３５，３５、前記短パイプ３８，３８を嵌合して、前記締め付け用ナット３６により締め付け固定することにより、可動子３０を容易に組み立て構成することができる。３９ａは前記締め付け用ナット３９の緩みを防止するためのロック用ナットである。 As a result, after the vibration base 3, the rubber wall 5, and the diaphragm 7 are assembled to the upper cylindrical fitting 22 of the second fixture 2 and the liquid is filled therein, the positioning nut is fixed to the shaft member 27. 36. By fitting the pipe member 37, the leaf springs 35, 35, and the short pipes 38, 38 to which the magnetic material portion 30a is fixed, the movable member 30 can be easily fixed by tightening and fixing with the tightening nut 36. Can be assembled and configured. Reference numeral 39a denotes a lock nut for preventing the tightening nut 39 from loosening.

また、前記板バネ３５，３５の形状や支持構造、前記固定子２８の保持構造、さらに両磁極部２９，２９の一対の永久磁石３１，３２やコイル３３，３３の配置構造、及びコイル励磁による可動子３０つまり軸部材２７の作動状態についても、上記した実施例と同様である。 Further, the shape and support structure of the leaf springs 35 and 35, the holding structure of the stator 28, the arrangement structure of the pair of permanent magnets 31 and 32 and the coils 33 and 33 of the magnetic pole portions 29 and 29, and coil excitation. The operating state of the mover 30, that is, the shaft member 27 is also the same as in the above-described embodiment.

なお、本発明は、エンジンマウントに限られず、種々の使用が可能であり、例えばサスペンションメンバーと車体側のフレームとの間に設けられるマウントにも適用することができる。 The present invention is not limited to an engine mount, and can be used in various ways. For example, the present invention can also be applied to a mount provided between a suspension member and a vehicle body side frame.

また、前記磁石部３４を、次の［ア］のように構成してあってもよい。 Further, the magnet part 34 may be configured as in the following [A].

［ア］前記右側の上下一対の永久磁石３１，３２のうち上側の永久磁石３１は、磁性材部３０ａと対向する面側がＳ極、反対面側がＮ極であり、下側の永久磁石３２は、磁性材部３０ａと対向する面側がＮ極、反対面側がＳ極である。左側の一対の永久磁石３１，３２のうち上側の永久磁石３１は、磁性材部３０ａと対向する面側がＮ極、反対側がＳ極であり、下側の永久磁石３２は、磁性材部３０ａと対向する面側がＳ極、反対側がＮ極であるもの。 [A] Of the pair of upper and lower permanent magnets 31 and 32 on the right side, the upper permanent magnet 31 has an S pole on the side facing the magnetic material portion 30a and an N pole on the opposite side, and the lower permanent magnet 32 has The surface facing the magnetic material portion 30a is the N pole, and the opposite surface is the S pole. Of the pair of left permanent magnets 31 and 32, the upper permanent magnet 31 has an N pole on the surface facing the magnetic material portion 30a and an S pole on the opposite side, and the lower permanent magnet 32 has a magnetic material portion 30a. The opposite side is the S pole and the opposite side is the N pole.

本発明は、内部液室の圧力を制御することで防振効果を高める形式の能動型液封入式防振装置として、エンジンマウントに特に好適に利用でき、さらに他のマウントにも利用できる。 INDUSTRIAL APPLICABILITY The present invention can be particularly suitably used for an engine mount as an active liquid-filled vibration isolator that enhances the vibration isolation effect by controlling the pressure of the internal liquid chamber, and can also be used for other mounts.

本発明の能動型液封入式防振装置の１実施例の縦断面図である。It is a longitudinal cross-sectional view of one Example of the active type liquid filled type vibration isolator of the present invention. アクチュエータの作用を示す略示説明図である。FIG. 6 is a schematic explanatory diagram illustrating the action of an actuator. コイルに電流を正方向に流したときのアクチュエータの作用を示す略示説明図である。It is a schematic explanatory drawing which shows the effect | action of an actuator when an electric current is sent through a coil to the positive direction. アクチュエータの作用を示す略示説明図である。FIG. 6 is a schematic explanatory diagram illustrating the action of an actuator. コイルに電流を逆方向に流したときのアクチュエータの作用を示す略示説明図である。It is a schematic explanatory drawing which shows the effect | action of an actuator when an electric current is sent through a coil in the reverse direction. 能動型液封入式防振装置のアクチュエータの駆動により作用する力Ｆと時間ｔの関係を示す図である。It is a figure which shows the relationship between the force F which acts by the drive of the actuator of an active liquid enclosure type vibration isolator, and time t. 従来の能動型液封入式防振装置のアクチュエータの駆動により作用する力Ｆと時間ｔの関係を示す図である。It is a figure which shows the relationship between the force F which acts by the drive of the actuator of the conventional active liquid filled type vibration isolator, and time t. 本発明の能動型液封入式防振装置の他の実施例の縦断面図である。It is a longitudinal cross-sectional view of the other Example of the active type liquid enclosure type vibration isolator of this invention. 同上実施例のオリフィス形成金具の一部の斜視図である。It is a one part perspective view of the orifice formation metal fitting of an Example same as the above.

符号の説明Explanation of symbols

１第１取付具
２第２取付具
３防振基体
３ａゴム層
３ｂ下端周縁部
４第１液室
５ゴム壁
５ａ，５ｂゴム層
６第２液室
７ダイヤフラム
８オリフィス
９アクチュエータ
１０筒状補強金具
１１オリフィス形成金具
１２シール用ゴム層
１４環状補強金具
１６貫通孔
１７開口
１９支持ブラケット
２１下部筒金具
２１ａ下部側筒部
２１ｂ上端側筒部
２２上部筒金具
２２ａ上部
２２ｂ上端部
２２ｃ下部
２２ｄ下端部
２３底板
２３ａ凸状部分
２７軸部材
２８固定子
２８ａヨーク
２９磁極部
３０可動子
３０ａ磁性材部
３１永久磁石
３２永久磁石
３３コイル
３４磁石部
３５板バネ
３６位置決め用ナット
３７パイプ部材
３８短パイプ
３９締め付け用ナット
４０，４１上下支持部材
４０ａ，４１ａ開口
７１外周部 DESCRIPTION OF SYMBOLS 1 1st fixture 2 2nd fixture 3 Anti-vibration base | substrate 3a Rubber layer 3b Lower-end peripheral part 4 1st liquid chamber 5 Rubber wall 5a, 5b Rubber layer 6 2nd liquid chamber 7 Diaphragm 8 Orifice 9 Actuator 10 Cylindrical reinforcement bracket DESCRIPTION OF SYMBOLS 11 Orifice formation metal fitting 12 Sealing rubber layer 14 Annular reinforcement metal fitting 16 Through-hole 17 Opening 19 Support bracket 21 Lower cylinder fitting 21a Lower cylinder part 21b Upper cylinder part 22 Upper cylinder fitting 22a Upper part 22b Upper part 22c Lower part 22d Lower end part 23 Bottom plate 23a Convex portion 27 Shaft member 28 Stator 28a Yoke 29 Magnetic pole part 30 Movable element 30a Magnetic material part 31 Permanent magnet 32 Permanent magnet 33 Coil 34 Magnet part 35 Plate spring 36 Positioning nut 37 Pipe member 38 Short pipe 39 Tightening Nut 40, 41 Vertical support member 40a, 41a Opening 1 outer periphery

Claims

第１取付具と筒状の第２取付具をゴム状弾性材から成る防振基体を介して連結し、前記第２取付具に前記防振基体と対向してゴム壁を設け、前記防振基体と前記ゴム壁との間を第１液室とし、この第１液室とは別にダイヤフラムが室壁の一部をなす第２液室を設け、前記第１液室と前記第２液室とをオリフィスにより連通させ、前記第１液室の室壁の一部をなす前記ゴム壁に連結した加振手段により該ゴム壁を加振して前記第１液室の圧力を制御するようにした能動型液封入式防振装置であって、
前記筒状の第２取付具の内部において、前記ゴム壁の前記第１液室側とは反対側に対向して前記ダイヤフラムが配され、前記ゴム壁の外周部に加硫接着されたオリフィス形成金具及び前記ダイヤフラムの外周部がそれぞれ前記第２取付具の内周に対し嵌着固定され、前記ゴム壁と前記ダイヤフラムとの間が該ゴム壁により前記第１液室と仕切られた第２液室として形成されるとともに、前記オリフィス形成金具が前記第１液室と第２液室を連通させるオリフィスを形成してなり、
前記加振手段は、前記ダイヤフラムを液密状態で貫通して前記ゴム壁に連結された軸部材を有し、該軸部材が、その外方に配した固定子に関して軸方向に往復動可能な可動子の少なくとも一部として構成された鉄心可動形のアクチュエータよりなり、前記固定子に備えるコイルが励磁されることにより、前記軸部材が往動行程及び復動行程の両方向に駆動されて前記ゴム壁を加振するように構成されてなることを特徴とする能動型液封入式防振装置。 The first fixture and the cylindrical second fixture are connected via a vibration-proof base made of a rubber-like elastic material, and a rubber wall is provided on the second fixture so as to face the vibration-proof base. A first liquid chamber is provided between the base and the rubber wall, and a second liquid chamber in which a diaphragm forms part of the chamber wall is provided separately from the first liquid chamber, and the first liquid chamber and the second liquid chamber are provided. Are communicated with each other by an orifice, and the pressure of the first liquid chamber is controlled by exciting the rubber wall by a vibration means connected to the rubber wall forming a part of the chamber wall of the first liquid chamber. Active liquid-filled vibration isolator,
In the inside of the cylindrical second fixture, an orifice is formed in which the diaphragm is disposed opposite to the side opposite to the first liquid chamber side of the rubber wall, and vulcanized and bonded to the outer peripheral portion of the rubber wall The outer periphery of the metal fitting and the diaphragm are respectively fitted and fixed to the inner periphery of the second fixture, and the second liquid is partitioned from the first liquid chamber by the rubber wall between the rubber wall and the diaphragm. Formed as a chamber, and the orifice forming bracket forms an orifice for communicating the first liquid chamber and the second liquid chamber,
The vibration means has a shaft member that penetrates the diaphragm in a liquid-tight state and is connected to the rubber wall, and the shaft member is capable of reciprocating in an axial direction with respect to a stator disposed on the outer side. The rubber comprises an iron core movable actuator configured as at least a part of the mover, and the shaft member is driven in both the forward stroke and the backward stroke by exciting a coil provided in the stator. An active liquid-sealed vibration isolator characterized by being configured to vibrate a wall.

前記第２取付具が、前記加振手段を保持する下部筒金具と、その上端側筒部の内周に圧入固定される上部筒金具とからなり、
前記防振基体の下端部外周に加硫接着された筒状補強金具が前記上部筒金具の上部内周に嵌着固定されるとともに、前記ゴム壁の外周部に有するオリフィス形成金具及び前記ダイヤフラムの外周部に加硫接着された環状補強金具が、それぞれ前記上部筒金具の下部内周に嵌着固定されて組み付けられるとともに、前記上部筒金具の下部が前記下部筒金具の上部内周に圧入固定されてなる請求項１に記載の能動形液封入式防振装置。 The second fixture is composed of a lower cylindrical bracket that holds the excitation means, and an upper cylindrical bracket that is press-fitted and fixed to the inner periphery of the upper end side cylindrical portion,
A cylindrical reinforcing bracket vulcanized and bonded to the outer periphery of the lower end portion of the vibration isolating base is fitted and fixed to the upper inner periphery of the upper cylindrical bracket, and the orifice forming bracket and the diaphragm of the outer peripheral portion of the rubber wall Annular reinforcing metal fittings that are vulcanized and bonded to the outer circumference are fitted and fixed to the lower inner circumference of the upper cylinder fitting, and the lower part of the upper cylindrical fitting is press-fitted to the upper inner circumference of the lower cylinder fitting The active liquid-filled vibration isolator according to claim 1.

前記上部筒金具の内周面にシール用ゴム層が加硫接着されており、前記防振基体外周部の筒状補強金具、前記ゴム壁外周部のオリフィス形成部材及び前記ダイヤフラム外周部の環状補強金具が、それぞれ前記上部筒金具の内周に前記シール用ゴム層を介して液密に嵌着固定されてなる請求項２に記載の能動型液封入式防振装置。 A rubber layer for sealing is vulcanized and bonded to the inner peripheral surface of the upper cylindrical metal fitting, and the cylindrical reinforcing metal fitting on the outer peripheral portion of the vibration isolating base, the orifice forming member on the outer peripheral portion of the rubber wall, and the annular reinforcement on the outer peripheral portion of the diaphragm 3. An active liquid-filled vibration isolator according to claim 2, wherein the metal fittings are respectively fixed in a liquid-tight manner to the inner periphery of the upper cylindrical metal fittings via the sealing rubber layer.

前記オリフィス形成金具が、外方に向かって開口する周方向の凹溝を有し、前記上部筒金具の内周に嵌着されることにより周方向に延びるオリフィスを形成する請求項４に記載の能動形液封入式防振装置。 5. The orifice forming metal fitting according to claim 4, wherein the orifice forming metal fitting has a circumferential groove that opens outward, and is fitted to an inner circumference of the upper cylindrical metal fitting to form an orifice extending in the circumferential direction. Active liquid-filled vibration isolator.

前記オリフィス形成金具は、外方に向かって開口する周方向の凹溝が上下二段に形成され、上下の凹溝が周方向の一個所で連通せしめられるとともに、上側の凹溝が第１液室に、下側の凹溝が第２液室に連通して、１周以上のオリフィス長を有してなる請求項４に記載の能動形液封入式防振装置。 In the orifice-forming metal fitting, the circumferential groove that opens outward is formed in two upper and lower stages, the upper and lower grooves communicate with each other in one circumferential direction, and the upper groove is the first liquid. The active liquid-filled vibration isolator according to claim 4, wherein the chamber has a lower concave groove communicating with the second liquid chamber and having an orifice length of one or more rounds.

前記軸部材を含む可動子の外方に配された前記固定子が径方向内方に向かって突出する磁極部を有し、該磁極部には、軸方向に隣合って異極をなす少なくとも一対の永久磁石が配されるとともに、該磁極部の周りにコイルが巻回されてなり、該コイル励磁により発生する起磁力と前記各永久磁石のそれぞれの起磁力との組み合わせにより、前記軸部材を往復動させるように構成されてなる請求項１〜５のいずれか１項に記載の能動型液封入式防振装置。 The stator disposed on the outer side of the mover including the shaft member has a magnetic pole portion protruding radially inward, and the magnetic pole portion is adjacent to the axial direction and has a different polarity. A pair of permanent magnets is arranged, and a coil is wound around the magnetic pole portion, and the shaft member is obtained by combining the magnetomotive force generated by the coil excitation and the magnetomotive force of each permanent magnet. The active liquid-sealed vibration isolator according to any one of claims 1 to 5, wherein the vibration isolator is configured to reciprocate.

前記アクチュエータは、前記第２取付具に取り付けた固定子と、前記軸部材の外周に磁性材部を取設してなり、かつ前記固定子に関して軸方向に往復移動可能に該固定子の内空部において支持してなる可動子とを有し、前記固定子には、前記可動子の磁性材部に対向する磁極部に、前記可動子の往復動方向に隣合った状態で前記磁性材部に対向する一対の永久磁石が、互いに異極をなすように前記往復動方向と直交する方向の磁極の並びを逆にして配設され、前記一対の永久磁石を通る磁束を発生可能なコイルが前記磁極部の周りに巻回されてなる請求項６に記載の能動型液封入式防振装置。 The actuator includes a stator attached to the second fixture, and a magnetic material portion provided on an outer periphery of the shaft member, and is capable of reciprocating in the axial direction with respect to the stator. And the stator has a magnetic member portion in a state of being adjacent to a magnetic pole portion facing the magnetic member portion of the mover in a reciprocating direction of the mover. A coil capable of generating a magnetic flux passing through the pair of permanent magnets, wherein the pair of permanent magnets facing each other is arranged with the arrangement of magnetic poles in the direction orthogonal to the reciprocating direction reversed so as to have different polarities. The active liquid filled type vibration damping device according to claim 6, wherein the active type liquid filled type vibration damping device is wound around the magnetic pole portion.

前記往復動方向に隣合って互いに異極をなす前記一対の永久磁石を、前記往復動方向と直交する方向で前記磁性材部を挟んで対向させて、かつ対向する磁極が互いに異極をなすように磁極の並びを逆にして、可動子を挟んで対向する前記固定子の各磁極部にそれぞれ配設してなる請求項７に記載の能動型液封入式防振装置。
The pair of permanent magnets adjacent to each other in the reciprocating direction and having different polarities are opposed to each other with the magnetic material portion interposed therebetween in a direction perpendicular to the reciprocating direction, and the opposing magnetic poles are different from each other. The active liquid-filled type vibration damping device according to claim 7, wherein the arrangement of the magnetic poles is reversed, and the magnetic pole portions of the stator are opposed to each other with the mover interposed therebetween.