JP4081022B2

JP4081022B2 - Active liquid-filled vibration isolator

Info

Publication number: JP4081022B2
Application number: JP2004006060A
Authority: JP
Inventors: 英明島津; 利幸北野
Original assignee: Toyo Tire and Rubber Co Ltd
Current assignee: Toyo Tire Corp
Priority date: 2003-11-04
Filing date: 2004-01-13
Publication date: 2008-04-23
Anticipated expiration: 2024-01-13
Also published as: JP2005155883A

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て、しかも出力を大きくして、かつ部品数を少なくして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 isolator capable of simplifying the structure, increasing the output, reducing the number of parts, and contributing to downsizing. is there.

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液室をこれとは別に設けた第２液室と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、前記上部筒金具の内方において、前記防振基体の下端部に前記第１液室の外周壁を構成する筒状金具の上部が加硫接着されるとともに、該筒状金具の外方を囲む筒状のダイヤフラムが配され、前記筒状金具の上端部が前記ダイヤフラムの上端部と共に前記上部筒金具の上端部に液密に固定され、また、前記ゴム壁の外周部に環状のオリフィス形成金具が加硫接着され、該オリフィス形成金具が前記ダイヤフラムの下端部と共に前記上部筒金具の下部内周に液密に嵌着固定され、前記オリフィス形成金具の上面に前記筒状金具の下端が接し、前記筒状金具と前記ダイヤフラムとの間が前記第２液室、前記ダイヤフラムと前記上部筒金具との間が空気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液室と前記第２液室を連通させるオリフィスを形成してなり、前記加振手段として、前記ゴム壁に連結した軸部材を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した鉄心可動形のアクチュエータを備え、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互いに異極をなす一対の永久磁石が、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、前記磁性部材を挟んで対向する前記永久磁石の左右外方側で前記磁極部の周りに巻回されてなり、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、前記固定子に備えるコイルを励磁することにより、前記軸部材を往動行程及び復動行程の両方向に駆動して前記ゴム壁を加振するように構成し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 opposite to the vibration-proof base. The first liquid chamber is formed between the rubber wall and the second liquid chamber which is provided separately from the first liquid chamber by an orifice, and forms a part of the chamber wall of the first liquid chamber. An active liquid-filled vibration isolator that vibrates the rubber wall by vibration means connected to the wall to control the pressure of the first liquid chamber, wherein the second fixture includes the vibration exciting device. The lower cylindrical metal fitting that holds the vibration means and the upper cylindrical metal fitting that is press-fitted and fixed to the inner periphery of the upper cylindrical portion. The upper part of the cylindrical fitting constituting the outer peripheral wall of the liquid chamber is vulcanized and bonded, and a cylindrical diaphragm surrounding the outer side of the cylindrical fitting is arranged. The upper end of the cylindrical fitting is liquid-tightly fixed to the upper end of the upper cylindrical fitting together with the upper end of the diaphragm, and an annular orifice forming fitting is vulcanized and bonded to the outer peripheral portion of the rubber wall, An orifice forming bracket is liquid-tightly fitted and fixed to a lower inner periphery of the upper cylindrical bracket together with a lower end portion of the diaphragm, and a lower end of the cylindrical bracket is in contact with an upper surface of the orifice forming bracket, and the cylindrical bracket and the diaphragm Is formed as an air chamber between the diaphragm and the upper cylindrical fitting, and the orifice forming fitting has an orifice for communicating the first liquid chamber and the second liquid chamber. An iron core that is formed and configured as at least a part of a mover that can reciprocate in the axial direction with respect to a stator that is arranged outwardly as a shaft member that is connected to the rubber wall. An actuator of Dogata, the actuator includes a stator mounted on said second fixture made by To設the magnetic material portion on the outer periphery of the shaft member, and capable of reciprocating axially with respect to the stator And a mover supported in the inner space of the stator, and the stator is adjacent to a magnetic pole part facing the magnetic material part of the mover in the reciprocating direction of the mover. A pair of permanent magnets having different polarities in a state where the magnetic poles are arranged in a direction perpendicular to the reciprocating direction, and a coil capable of generating a magnetic flux passing through the pair of permanent magnets, It is wound around the magnetic pole part on the left and right outer sides of the permanent magnets facing each other with a magnetic member interposed therebetween, and by a combination of magnetomotive force generated by the coil excitation and each magnetomotive force of each permanent magnet And reciprocating the shaft member And is configured to excite the rubber wall by driving the shaft member in both forward and backward strokes by exciting a coil provided in the stator. To do.

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, it is possible to eliminate the delay in the rise of the force generated by the reciprocating motion of the shaft member of the actuator as the vibration means, and the pressure control of the first liquid chamber can be performed smoothly and quickly. In addition, 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発生する力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] generated in 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。そして、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 sinusoidal alternating current is passed through the coil, the Ft curve can be made into a sinusoidal curve corresponding to a sinusoidal curve representing the current-time relationship of the sinusoidal 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、第２取付具の上部筒金具の内方において、前記防振基体に加硫接着され第１液室の外周壁を構成する筒状金具の径方向外側に、ダイヤフラムを配して該筒状金具との間に環状の第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液室と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、且つ部品数も少なくできる。例えば、加振手段の前記軸部材にはゴム壁を連結するだけで済み、ゴム壁自体の形態構造や軸部材周りの部品点数を削減できる。 In the present invention, a diaphragm is disposed on the radially outer side of the cylindrical fitting that is vulcanized and bonded to the vibration-proof base and forms the outer peripheral wall of the first liquid chamber, inside the upper cylindrical fitting of the second fixture. An annular second liquid chamber is formed between the first liquid chamber and the cylindrical metal fitting, and the first liquid chamber and the second liquid chamber are communicated by an orifice forming metal fitting which is vulcanized and bonded to the outer peripheral portion of the rubber wall. Since the orifice to be formed is formed, the second liquid chamber can be configured in a compact and simple manner without exposing the diaphragm to the outside, and an orifice structure for communicating the first liquid chamber and the second liquid chamber is also provided. It can be simplified and the number of parts can be reduced. For example, it is only necessary to connect a rubber wall to the shaft member of the vibration means, and the shape structure of the rubber wall itself and the number of parts around the shaft member can be reduced.

しかも、比較的薄いゴム膜よりなる前記ダイヤフラムを上部筒金具により保護できる上、該ダイヤフラムと前記上部筒金具との間に空気室を有することで、前記ダイヤフラムの液圧変動に伴う動きも許容できることにもなる。 In addition, the diaphragm made of a relatively thin rubber film can be protected by the upper cylindrical fitting, and an air chamber is provided between the diaphragm and the upper cylindrical fitting so that the movement of the diaphragm due to fluid pressure fluctuation can be allowed. It also becomes.

さらに、第２取付具の上部筒金具の内周に対し、前記筒状金具の上端部および前記オリフィス形成金具をそれぞれ前記ダイヤフラムの上下端部と共に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、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。 Further, by fitting and fixing the upper end portion of the tubular fitting and the orifice forming fitting together with the upper and lower ends of the diaphragm to the inner periphery of the upper tubular fitting of the second fixture, the first liquid chamber, The apparatus main body including the second liquid chamber and the orifice can be easily assembled and configured. Therefore, for example, these apparatus main body parts are assembled and configured separately from the vibration means, and then the lower cylinder fitting and the upper cylinder fitting of the second fixture holding the vibration means are press-fitted and fixed. It is also possible to assemble and manufacture the whole.

特に、前記ゴム壁の外周に加硫接着されたオリフィス形成金具が外側に向かって開口した周方向の凹溝状をなし、該オリフィス形成金具の外周に前記ダイヤフラムの下端部に加硫接着された筒状補強金具が液密に嵌着されるとともに、該補強金具が前記上部筒金具の下部内周に嵌着固定されてなる構成を採用した場合は、組み付け作業が容易であって、前記オリフィスを簡単に構成でき、シール性も良好に保持できる。 In particular, an orifice-forming metal fitting that is vulcanized and bonded to the outer periphery of the rubber wall has a circumferential groove shape that opens outward, and is vulcanized and bonded to the outer periphery of the orifice-forming metal fitting at the lower end of the diaphragm. When the cylindrical reinforcing metal fitting is fitted in a liquid-tight manner and the reinforcing metal fitting is fitted and fixed to the lower inner periphery of the upper cylindrical metal fitting, the assembly work is easy and the orifice Can be easily constructed, and the sealing property can be maintained well.

また、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、前記ダイヤフラムの上端部に加硫接着された筒状の補強金具及び下端部に加硫接着された筒状補強金具が、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気密に嵌着されることにより、第２液室を構成するダイヤフラムを確実にかつシール性よく固定できるとともに、このダイヤフラムの外側に存する空気室のシール性も良好に保持できることになる。 Also, a rubber layer for sealing is vulcanized and bonded to the inner peripheral surface of the upper cylindrical metal fitting, and a cylindrical reinforcing metal fitting that is vulcanized and bonded to the upper end portion of the diaphragm and a cylindrical shape that is vulcanized and bonded to the lower end portion. Reinforcing metal fittings are hermetically fitted to the inner circumference of the upper cylindrical metal fittings through the sealing rubber layer, so that the diaphragm constituting the second liquid chamber can be fixed securely and with good sealing properties. The sealing performance of the air chamber existing outside the diaphragm can be maintained well.

前記の鉄心可動形のアクチュエータは、前記軸部材の外側方に配した前記固定子の磁極部に、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、該コイルの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、前記の軸部材を往復動させるように構成してなるものである。 In the iron core movable actuator, the magnetic pole portion of the stator arranged on the outer side of the shaft member is provided with at least a pair of permanent magnets adjacent to each other in the axial direction and having different polarities, and the magnetic pole portion A coil is wound around and the shaft member is reciprocated by a combination of a magnetomotive force generated by excitation of the coil and a magnetomotive force of each permanent magnet. It is.

具体的には、前記アクチュエータとして、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互いに異極をなす一対の永久磁石が、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、前記磁性部材を挟んで対向する前記永久磁石の左右外方側で前記磁極部の周りに巻回されてなる構成よりなる。
Specifically, as the actuator, a stator attached to the second fixture, and a magnetic material portion is provided on the outer periphery of the shaft member, and the actuator 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 in a pair of permanent magnets forming a heteropolar each other, and the arrangement direction of the magnetic poles perpendicular to the reciprocating direction reversed it is arranged, capable of coils generating a magnetic flux passing through the pair of permanent magnets, the magnetic member ing from configuration ing wound around the magnetic pole in interposed therebetween lateral outward opposing the permanent magnet.

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。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 is applied to 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.

前記の能動型液封入式防振装置において、板面が前記軸部材の軸心方向を向き、前記軸心方向で間隔を空けて位置する一対の板バネを介して前記軸部材を前記固定子に支持したものであると、往復移動に伴って可動子の軸部材に摩擦抵抗が加わるのを回避することができ、以て前記軸部材の往復運動がスムーズになる。 In the active liquid filled type vibration isolator, the plate member faces the axial direction of the shaft member, and the shaft member is fixed to the stator via a pair of leaf springs that are spaced apart in the axial direction. If it is supported, frictional resistance is not applied to the shaft member of the mover along with the reciprocating movement, and the reciprocating motion of the shaft member becomes smooth.

本発明によれば、第２取付具の上部筒金具の内方部において、第１液室、第２液室及び該第２液室の室壁をなすダイヤフラム、その動きを許容する空気室、さらには第１液室と第２液室を連通させるオリフィスを設定でき、その構造および組み立て作業を簡略化できるとともに、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, in the inner part of the upper tubular fitting of the second fixture, the first liquid chamber, the second liquid chamber, the diaphragm forming the chamber wall of the second liquid chamber, the air chamber allowing movement thereof, Furthermore, an orifice that allows communication between the first liquid chamber and the second liquid chamber can be set, the structure and assembly work can be simplified, the number of parts can be reduced, and the space can be reduced. It is possible to provide an active liquid-filled vibration isolator capable of increasing the output and reducing the size.

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. is 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２１ｂを介して径大の上端側筒部２１ｃが連続して形成されており、この上端側筒部２１ｃ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 cylindrical portion 21c via an inclined portion 21b on a lower side cylindrical 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 upper end side cylinder part 21c. 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 a hollow truncated cone shape on the bottom 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の下端部には、前記第１液室４の外周壁を構成する筒状金具１０のテーパ状の上部１０ａ、すなわち図のように上方に向かって漸次拡開したテーパ状をなす上部１０ａが加硫接着されており、筒状の下部１０ｂが下方のゴム壁５の部分にまで延び、前記第１液室４の外周壁をなしている。１０ａ１は前記上部１０ａの上端部を示す。図の場合、該筒状金具１０の下部１０ｂの内周に防振基体３から連続するゴム層３ｂが装設されている。 The lower end portion of the vibration-isolating base 3 has a tapered upper portion 10a of the cylindrical fitting 10 constituting the outer peripheral wall of the first liquid chamber 4, that is, a tapered shape that gradually expands upward as shown in the figure. An upper portion 10a formed is vulcanized and bonded, and a cylindrical lower portion 10b extends to a portion of the lower rubber wall 5 to form an outer peripheral wall of the first liquid chamber 4. Reference numeral 10a1 denotes an upper end portion of the upper portion 10a. In the case of the figure, a rubber layer 3 b continuous from the vibration isolating base 3 is provided on the inner periphery of the lower part 10 b of the cylindrical metal fitting 10.

前記筒状金具１０の外方には、該筒状金具１０を囲む比較的薄肉のゴム膜よりなり且つ軸心方向（上下方向）の中央部が内方に膨出したくびれ形状をなすダイヤフラム７が配されている。このダイヤフラム７の上端部及び下端部には、それぞれ筒状の補強金具７１及び７２が加硫接着されている。図の場合、前記上端部の補強金具７１の外周面及び前記下端部の補強金具７２の内周面に、それぞれ前記ダイヤフラム７と一体の薄いゴム層７１ａ，７２ａが加硫接着され装設されている。前記上端部の補強金具７１は、前記筒状金具１０の上端部１０ａ１の外周に圧入手段により嵌着固定されるとともに、この筒状金具１０の前記上端部１０ａ１が、前記補強金具７１と共に前記第２取付具２の上部筒金具２２の上端部に液密に嵌着されかしめ固定されている。 On the outer side of the cylindrical metal fitting 10, a diaphragm 7 is formed of a relatively thin rubber film surrounding the cylindrical metal fitting 10 and has a constricted shape with a central portion in the axial direction (vertical direction) bulging inward. Is arranged. Cylindrical reinforcement fittings 71 and 72 are vulcanized and bonded to the upper end and the lower end of the diaphragm 7, respectively. In the case of the figure, thin rubber layers 71a, 72a integral with the diaphragm 7 are respectively vulcanized and bonded to the outer peripheral surface of the reinforcing metal fitting 71 at the upper end and the inner peripheral surface of the reinforcing metal fitting 72 at the lower end. Yes. The reinforcing bracket 71 at the upper end is fitted and fixed to the outer periphery of the upper end 10 a 1 of the cylindrical bracket 10 by press-fitting means, and the upper end 10 a 1 of the cylindrical bracket 10 together with the reinforcing bracket 71 is 2 The upper fitting 22 of the fixture 2 is liquid-tightly fitted and fixed by caulking.

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、その外周に前記ダイヤフラム７の下端部の補強金具７２が前記ゴム層７２ａを介して液密に嵌着されるとともに、該補強金具７２と共に前記上部筒金具２２の下部内周に液密に嵌着固定されて、一体的に組み付けられており、この状態において、前記オリフィス形成金具１１の部分の上面に前記筒状金具１０の下端がシール状態を保持するように接した状態に保持されている。特に、前記上部筒金具２２の内周面には、シール用ゴム層２２ａが加硫接着されており、該シール用ゴム層２２ａを介して前記ダイヤフラム７の上端部および下端部の補強金具７１および７２がそれぞれ気密に嵌着されている。図の場合、前記オリフィス形成金具１１の下に、前記ゴム壁５の下方部を覆うカバープレート１５が前記オリフィス形成金具１１と共に一体にかしめ固定されている。このカバープレート１５の中央部には、後述するアクチュエータ９の軸部材の上下動を許容する貫通孔１６が設けらけれている。このカバープレート１５はアクチュエータ９の抑えの役目もはたす。 Further, an annular orifice forming metal fitting 11 having a circumferential groove shape 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 has a reinforcing metal fitting 72 at the lower end of the diaphragm 7 fitted in a liquid-tight manner on the outer periphery of the orifice forming metal fitting 11 via the rubber layer 72a. It is liquid-tightly fitted and fixed to the periphery, and is integrally assembled. In this state, the lower end of the cylindrical metal fitting 10 is in contact with the upper surface of the orifice-forming metal fitting 11 so that the sealed state is maintained. Held in a state. In particular, a sealing rubber layer 22a is vulcanized and bonded to the inner peripheral surface of the upper cylindrical metal fitting 22, and the reinforcing metal fittings 71 at the upper and lower ends of the diaphragm 7 are provided via the sealing rubber layer 22a. 72 are fitted in an airtight manner. In the case of the figure, a cover plate 15 covering the lower portion of the rubber wall 5 is caulked and fixed together with the orifice forming metal fitting 11 below the orifice forming metal fitting 11. A through-hole 16 is provided at the center of the cover plate 15 to allow the shaft member of the actuator 9 described later to move up and down. The cover plate 15 also serves to suppress the actuator 9.

こうして組み付けられることにより、前記筒状金具１０と前記ダイヤフラム７との間が前記第２液室６として形成され、前記ダイヤフラム７と前記上部筒金具２２との間が空気室１３として形成されている。さらに、前記オリフィス形成金具１１の凹溝部分が、連通部８ａ，８ｂにより前記第１液室４と前記第２液室６を連通させるオリフィス８として形成されている。 By being assembled in this way, the space between the tubular metal fitting 10 and the diaphragm 7 is formed as the second liquid chamber 6, and the space between the diaphragm 7 and the upper tube metal fitting 22 is formed as the air chamber 13. . Further, the concave groove portion of the orifice-forming metal fitting 11 is formed as an orifice 8 for communicating the first liquid chamber 4 and the second liquid chamber 6 by communication portions 8a and 8b.

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２１ｃ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 press-fitted and assembled to the upper end side tubular portion 21 c 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、内方の上方向きの凸状部分２３ａ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。 A support bracket 19 is fixed to the outer peripheral portion of the lower cylindrical portion 21a of the lower cylindrical metal member 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 is attached to a frame on the vehicle body side. A plurality of connecting bolts 20 for connecting are fixed. The bottom plate 23 is provided so that the actuator 9 can be received and supported by an inwardly upward convex portion 23a.

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を縦姿勢に設定し、該軸部材２７の先端部に円板状の頭部２６を張出し形成し、これを前記ゴム壁５の加硫成形工程で該ゴム壁５の中央部に埋設・連結してある。そして、後述のように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を構成してある。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。 The iron core movable electromagnet actuator 9 which is the vibration means of the rubber wall 5 sets the shaft member 27 that constitutes at least a part of the movable member that can reciprocate in the axial direction with respect to the stator in a vertical posture. A disc-shaped head portion 26 is formed in a projecting manner at the tip of the shaft member 27, and is embedded and connected to the central portion of the rubber wall 5 in the vulcanization molding process of the rubber wall 5. Then, the actuator 9 is configured to electrically drive the mover, that is, the shaft member 27 in both forward and backward strokes, by exciting a coil provided in the stator as will be described later. is there. 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、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内空部に向かって突出する磁極部２９，２９を有している。 The stator 28 includes 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 the movable element 30 at a central portion in the axial direction of the yoke 28a. The magnetic pole portions 29 and 29 protrude from both sides toward the inner space so as to face each other.

前記可動子３０は、基本的に、前記軸部材２７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 material portion 30a as a mover iron core formed by laminating a number of metal disks made of the same magnetic metal at an intermediate portion in the axial center direction of the shaft member 27. It has been made.

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における位置決め用のナット３６ａを嵌合して上部側の段部２７ａ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との間に挟着する一対の短パイプ３８，３８を嵌合し、さらに前記軸部材２７の端部のネジ部２７ｂに締め付け用の前記ナット３６を螺合して締付けることにより固定している。３９は前記締め付け用ナット３６の緩みを防止するためのロック用ナットである。 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, a positioning nut 36a in the shaft member 27 is fitted and engaged with the upper stepped portion 27a. And a pair of short pipes 38, 38 sandwiching the leaf springs 35, 35 and the pipe member 37, and further, the screw portion 27b at the end of the shaft member 27 is fastened to the screw portion 27b. The nut 36 is fixed by screwing and tightening. Reference numeral 39 denotes a lock nut for preventing the tightening nut 36 from loosening.

このような構成を採用することにより、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を組み付けるまでは、前記可動子３０の軸部材２７のみをゴム壁５に連結した状態にしておき、この組み付け後に、前記軸部材２７に対し、前記位置決め用ナット３６ａ、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して、可動子３０を組み立て構成することができる。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に圧入される固定子２８の内孔部に挿入され、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。 By adopting such a configuration, only the shaft member 27 of the movable element 30 is attached to the rubber wall until the oscillating base 3, the rubber wall 5, and the diaphragm 7 are assembled to the upper cylindrical fitting 22 of the second fixture 2. 5 and connected to the shaft member 27, the pipe member 37, the plate springs 35, 35, the short pipe 38, The mover 30 can be assembled and configured by fitting 38 and tightening and fixing with the tightening nut 36. 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. Is inserted into an inner hole portion of the stator 28 press-fitted into the stator, and is connected to and supported by the stator 28 via the leaf springs 35 and 35 so as to reciprocate in the vertical direction (axial direction of the shaft member 27). The

前記板バネ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リング状に形成され、上下方向で互いに間隔を空けて、かつ前記磁性材部３０ａとの間にも間隔を保有して位置している。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、その外周端部が前記固定子２８の外周部において上下ケース部材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。前記上下ケース部材４０，４１の中央部には、前記位置決め用ナット３６ａ及び締め付け用ナット３６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３６ａ，３６が通り抜けできる開口２３ｂ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 plate springs 35, 35 are formed in a rectangular ring shape partially constricted inwardly so as to bypass a coil portion to be described later, and are spaced apart from each other in the vertical direction with the magnetic material portion 30a. It is located with a gap in between. Each leaf spring 35 has an inner peripheral end sandwiched between the pipe member 37 and the short pipes 38 and 38 as described above, and an outer peripheral end of the leaf spring 35 at the outer peripheral portion of the stator 28. The case members 40 and 41 are fixed to a fastening portion by a bolt 42 that fastens and fixes the yoke members 28a with the yoke 28a interposed therebetween, and are supported so as to be elastically deformable. Openings 40a and 41a through which the positioning nut 36a and the tightening nut 36 can pass are provided at the center of the upper and lower case members 40 and 41, and also at the center of the convex portion 23a of the bottom plate 23. An opening 23b through which the nuts 36a, 36 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発生する力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] generated in 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.

また、本発明の防振装置は、第２取付具２の上部筒金具２２の内方において、第１液室４の径方向外側に第２液室とダイヤフラム７を設け、さらに第１液室４と第２液室６とを連通させるオリフィス８を組み込んでいるので、前記ダイヤフラム７を外部に露出させずに前記第２液室６をコンパクトに且つ簡単に構成できるとともに、オリフィス構造も簡略化でき、且つ部品数も少なくできる。 In addition, the vibration isolator of the present invention is provided with the second liquid chamber and the diaphragm 7 on the radially outer side of the first liquid chamber 4 inside the upper cylindrical fitting 22 of the second fixture 2, and further, the first liquid chamber 4 and the second liquid chamber 6 are incorporated into the orifice 8, so that the second liquid chamber 6 can be configured compactly and easily without exposing the diaphragm 7 to the outside, and the orifice structure is also simplified. And the number of parts can be reduced.

なお、本発明は、エンジンマウントに限られず、種々の実施が可能であり、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。例えば、前記可動子３０としては、軸部材２７に磁性材部３０ａを圧入手段等により直に固定して設けたものであってもよい。 The present invention is not limited to the engine mount, and various implementations are possible. For example, the present invention can also be applied to a mount provided between the suspension member and the vehicle body side frame. For example, the mover 30 may be one in which the magnetic material portion 30a is directly fixed to the shaft member 27 by press-fitting means or the like.

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.

本発明の能動型液封入式防振装置の縦断面図である。It is a longitudinal cross-sectional view 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。It is a schematic explanatory drawing which shows the effect | 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。It is a schematic explanatory drawing which shows the effect | 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に加わる力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 and time t which are added to an active liquid enclosure type vibration isolator. 従来の能動型液封入式防振装置に加わる力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 and time t which are applied to the conventional active liquid filled type vibration isolator.

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，３ｂゴム層
４第１液室
５ゴム壁
５ａゴム層
６第２液室
７ダイヤフラム
７１上端部の筒状補強金具
７ｂ下端部の筒状補強金具
８オリフィス
９アクチュエータ
１０筒状金具
１１オリフィス形成金具
２２ａシール用ゴム層
１３空気室
１５カバープレート
１６貫通孔
２１下部筒金具
２２上部筒金具
２１ａ下部側筒部
２１ｂ段部
２１ｃ上端側筒部
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締め付け用ナット
３６ａ位置決め用ナット
３７パイプ部材
３８短パイプ
４０，４１上下ケース部材
４０ａ，４１ａ開口 DESCRIPTION OF SYMBOLS 1 1st fixture 2 2nd fixture 3 Anti-vibration base | substrate 3a, 3b Rubber layer 4 1st liquid chamber 5 Rubber wall 5a Rubber layer 6 2nd liquid chamber 7 Diaphragm 71 Cylindrical reinforcement metal fitting 7b Bottom end cylinder Reinforcing plate 8 Orifice 9 Actuator 10 Cylindrical bracket 11 Orifice forming bracket 22a Rubber layer for sealing 13 Air chamber 15 Cover plate 16 Through hole 21 Lower cylindrical bracket 22 Upper cylindrical bracket 21a Lower side cylindrical portion 21b Step portion 21c Upper end side cylindrical portion 23 bottom plate 23a convex portion 27 shaft member 28 stator 28a yoke 29 magnetic pole portion 30 mover 30a magnetic material portion 31 permanent magnet 32 permanent magnet 33 coil 34 magnet portion 35 leaf spring 36 tightening nut 36a positioning nut 37 pipe member 38 Short pipe 40, 41 Upper and lower case members 40a, 41a Opening

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液室をこれとは別に設けた第２液室と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、
前記上部筒金具の内方において、前記防振基体の下端部に前記第１液室の外周壁を構成する筒状金具の上部が加硫接着されるとともに、該筒状金具の外方を囲む筒状のダイヤフラムが配され、前記筒状金具の上端部が前記ダイヤフラムの上端部と共に前記上部筒金具の上端部に液密に固定され、また、前記ゴム壁の外周部に環状のオリフィス形成金具が加硫接着され、該オリフィス形成金具が前記ダイヤフラムの下端部と共に前記上部筒金具の下部内周に液密に嵌着固定され、前記オリフィス形成金具の上面に前記筒状金具の下端が接し、前記筒状金具と前記ダイヤフラムとの間が前記第２液室、前記ダイヤフラムと前記上部筒金具との間が空気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液室と前記第２液室を連通させるオリフィスを形成してなり、
前記加振手段として、前記ゴム壁に連結した軸部材を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した鉄心可動形のアクチュエータを備え、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互いに異極をなす一対の永久磁石が、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、前記磁性部材を挟んで対向する前記永久磁石の左右外方側で前記磁極部の周りに巻回されてなり、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、
前記固定子に備えるコイルを励磁することにより、前記軸部材を往動行程及び復動行程の両方向に駆動して前記ゴム壁を加振するように構成し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, a rubber wall is provided facing the vibration-proof base, the vibration-proof base, the rubber wall, The first liquid chamber is connected to the second liquid chamber provided separately from the first liquid chamber by an orifice and connected to the rubber wall forming a part of the chamber wall of the first liquid chamber. An active liquid-filled vibration isolator configured to vibrate the rubber wall by vibration means to control the pressure of the first liquid chamber,
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,
The upper part of the cylindrical metal part constituting the outer peripheral wall of the first liquid chamber is vulcanized and bonded to the lower end part of the vibration isolating base at the inner side of the upper cylindrical metal part and surrounds the outer side of the cylindrical metal part. A cylindrical diaphragm is disposed, and an upper end portion of the cylindrical fitting is liquid-tightly fixed to an upper end portion of the upper cylindrical fitting together with an upper end portion of the diaphragm, and an annular orifice forming fitting is provided on the outer peripheral portion of the rubber wall. Is vulcanized and bonded, and the orifice forming fitting is liquid-tightly fitted and fixed to the lower inner periphery of the upper tubular fitting together with the lower end of the diaphragm, and the lower end of the cylindrical fitting is in contact with the upper surface of the orifice forming fitting, A space between the tubular fitting and the diaphragm is formed as the second liquid chamber, a space between the diaphragm and the upper tubular fitting is formed as an air chamber, and the orifice forming fitting is formed between the first liquid chamber and the second liquid chamber. Communicating liquid chamber Orifice to form will be that,
Examples vibrating means comprise at least a portion configured as a core movable type actuator of the reciprocable armature in the axial direction with respect to the shaft member connected to the rubber wall stator arranged on the outside, the actuator Is formed by providing a stator attached to the second fixture and a magnetic material portion on the outer periphery of the shaft member, and capable of reciprocating in the axial direction with respect to the stator. And a pair of stators having different polarities adjacent to each other in a reciprocating direction of the mover on a magnetic pole portion facing the magnetic material portion of the mover. The permanent magnets are arranged with the arrangement of magnetic poles in the direction orthogonal to the reciprocating direction reversed, and coils that can generate magnetic flux passing through the pair of permanent magnets are opposed to each other with the magnetic member interposed therebetween. The magnetic pole part on the left and right outer sides of the magnet Wound would be around, in combination with each of the magnetomotive force of the electromotive force and the respective permanent magnets produced by the coil energized, is configured to the shaft member so as to reciprocate,
An active liquid configured to excite the rubber wall by driving the shaft member in both forward and backward strokes by exciting a coil provided in the stator. Enclosed vibration isolator.

前記ゴム壁の外周に加硫接着されたオリフィス形成金具が外側に向かって開口した周方向の凹溝状をなし、該オリフィス形成金具の外周に前記ダイヤフラムの下端部に加硫接着された筒状補強金具が液密に嵌着されるとともに、該補強金具が前記上部筒金具の下部内周に嵌着固定されてなる請求項１にか記載の能動型液封入式防振装置。 An orifice-forming metal fitting that is vulcanized and bonded to the outer periphery of the rubber wall forms a circumferential groove shape that opens outward, and a cylindrical shape that is vulcanized and bonded to the outer periphery of the orifice-forming metal fitting at the lower end of the diaphragm The active liquid-filled vibration isolator according to claim 1, wherein the reinforcing metal fitting is fitted in a liquid-tight manner, and the reinforcing metal fitting is fitted and fixed to the lower inner periphery of the upper cylindrical metal fitting.

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、前記ダイヤフラムの上端部に加硫接着された筒状の補強金具及び下端部に加硫接着された筒状補強金具が、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気密に嵌着されてなる請求項１または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 a cylindrical reinforcing metal fitting that is vulcanized and bonded to the upper end portion of the diaphragm and a cylindrical reinforcing metal fitting that is vulcanized and bonded to the lower end portion. 3. The active liquid-filled type vibration damping device according to claim 1, wherein the vibration-proof device is hermetically fitted to the inner periphery of the upper cylindrical metal fitting through the sealing rubber layer.

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１〜３のいずれか１項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 prevention according to any one of claims 1 to 3, 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. Shaker.

板面が前記可動子の軸心方向を向き、前記軸心方向で間隔を空けて位置する一対の板バネを介して、前記可動子の軸部材を前記固定子に支持してなる請求項１〜４のいずれか１項に記載の能動型液封入式防振装置。 The plate surface faces the axial direction of the mover, the shaft via a pair of leaf springs positioned at intervals in the cardiac direction, and supports the shaft member of the mover to the stator claim 1 The active liquid-filled vibration isolator according to any one of -4.