JP2002206590A - Liquid sealing type vibration absorbing device - Google Patents
Liquid sealing type vibration absorbing deviceInfo
- Publication number
- JP2002206590A JP2002206590A JP2001004777A JP2001004777A JP2002206590A JP 2002206590 A JP2002206590 A JP 2002206590A JP 2001004777 A JP2001004777 A JP 2001004777A JP 2001004777 A JP2001004777 A JP 2001004777A JP 2002206590 A JP2002206590 A JP 2002206590A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- liquid chamber
- partition wall
- absorbing device
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Combined Devices Of Dampers And Springs (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、主として自動車用
エンジンを車体に弾性支持させて振動を吸収し減衰する
エンジンマウント等に用いられる液体封入式振動吸収装
置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled vibration absorbing device mainly used for an engine mount or the like which absorbs and attenuates vibration by elastically supporting an automobile engine on a vehicle body.
【０００２】[0002]
【従来の技術】この種の液体封入式振動吸収装置は、弾
性ゴム及びダイヤフラム等の弾性体を含む中空状本体ボ
ディの内部に仕切り用隔壁を設けることで主，副二つの
液室が区画形成され、振動付加時の弾性ゴムの変形に伴
って圧縮される主液室内の封入液体の一部が緩衝用オリ
フィスを通過して副液室側に流動することによって、主
液室内の液圧変動を吸収させて振動を減衰するように構
成されているのが一般的である。2. Description of the Related Art In a liquid-filled vibration absorbing device of this type, two main and sub liquid chambers are formed by forming a partition wall inside a hollow main body containing an elastic body such as elastic rubber and a diaphragm. Fluid pressure fluctuations in the main liquid chamber are caused by a part of the sealed liquid in the main liquid chamber, which is compressed due to the deformation of the elastic rubber when vibration is applied, flows through the buffer orifice to the sub liquid chamber. Is generally configured to absorb vibrations to attenuate vibration.
【０００３】しかし、上記のごとく緩衝用オリフィスの
みを有し、仕切り用隔壁が固定されてなる液体封入式振
動吸収装置では、振動が低周波数領域の場合は封入液体
がオリフィスを通過して副液室側に流動するので、主液
室内の液圧変動を吸収して振動を減衰することが可能で
あるものの、振動が高周波数領域の場合はオリフィスが
閉ざされたと同様な状態となるために、主液室内の液圧
変動を吸収することができず、高周波振動を減衰するこ
とができない。However, as described above, in a liquid-filled vibration absorbing device having only a buffer orifice and having a fixed partition wall, when the vibration is in a low frequency region, the sealed liquid passes through the orifice and passes through the secondary liquid. Since it flows to the chamber side, it is possible to absorb the fluid pressure fluctuation in the main fluid chamber and attenuate the vibration, but if the vibration is in the high frequency region, it will be in the same state as the orifice is closed, Fluid pressure fluctuations in the main liquid chamber cannot be absorbed, and high-frequency vibrations cannot be attenuated.
【０００４】そこで、従来、（１）二つの液室を区画す
る仕切り用隔壁をゴムエマトラマーなどを用いた弾性膜
から構成し、高周波数領域の振動が作用したとき、弾性
膜からなる仕切り用隔壁を弾性変位させることで主液室
の液圧変動を吸収させるように構成したもの、（２）例
えば特開平７−２２４８８５号公報や特開平５−１６４
１８１号公報等に開示されているように、主液室の側壁
の一部を可動板あるいは振動板（以下、可動板等と称す
る）から構成し、この可動板等を電磁石と磁性流体との
組み合わせによる電磁力を介して変位させることによ
り、高周波数領域の振動が作用したときの主液室内の液
圧変動を吸収させるように構成したもの、が提案されて
いた。Therefore, conventionally, (1) a partition wall for partitioning two liquid chambers is formed of an elastic film using a rubber emma trama, and when a vibration in a high frequency region acts, the partition wall made of the elastic film is formed. One configured to absorb the fluctuation of the liquid pressure in the main liquid chamber by elastic displacement. (2) For example, JP-A-7-224885 and JP-A-5-164
As disclosed in Japanese Patent Application Laid-Open No. 181/181, a part of the side wall of the main liquid chamber is constituted by a movable plate or a vibrating plate (hereinafter referred to as a movable plate or the like), and the movable plate or the like is formed of an electromagnet and a magnetic fluid. There has been proposed a configuration in which a displacement through a combination of electromagnetic forces is used to absorb fluctuations in hydraulic pressure in a main liquid chamber when vibration in a high frequency region acts.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前者
（１）のような従来の液体封入式振動吸収装置の場合
は、仕切り用隔壁が弾性膜であっても、１つの部材であ
る限りその剛性は一定で、振動周波数に応じて剛性を変
化させることができないために、特定（一つまたは非常
に狭い範囲）の周波数領域の振動に対してのみ減衰効果
が発揮されるだけで、それ以外の周波数領域の振動に対
しては十分な減衰効果を発揮させることができない。However, in the case of the conventional liquid-encapsulated vibration absorbing device such as the former (1), even if the partition wall is an elastic film, its rigidity is limited as long as it is a single member. Since it is constant and cannot change its stiffness according to the vibration frequency, it only exerts the damping effect on vibrations in a specific (one or very narrow range) frequency range, and at other frequencies A sufficient damping effect cannot be exerted on the vibration in the region.
【０００６】また、後者（２）のような従来の液体封入
式振動吸収装置は、可動板等の変位によって主液室内の
液圧調整のみが可能であり、共振周波数は調整すること
ができない、あるいは、極く限られた狭い周波数範囲で
のみ調整可能であるから、広い範囲の高周波数領域の振
動に対する減衰効果は不十分であるという問題があっ
た。In the conventional liquid-filled vibration absorbing device such as the latter (2), only the liquid pressure in the main liquid chamber can be adjusted by the displacement of the movable plate or the like, and the resonance frequency cannot be adjusted. Alternatively, since adjustment is possible only in a very limited narrow frequency range, there is a problem that the damping effect on vibration in a wide range of high frequency regions is insufficient.
【０００７】本発明は上記のような実情に鑑みてなされ
たもので、仕切り用隔壁自体に共振周波数の調整機能を
持たせて、広範な高周波数領域の振動に対して十分な減
衰効果を発揮させることができる液体封入式振動吸収装
置を提供することを目的としている。The present invention has been made in view of the above circumstances, and has a function of adjusting the resonance frequency of the partitioning partition itself so as to exhibit a sufficient damping effect against vibrations in a wide range of high frequencies. It is an object of the present invention to provide a liquid-encapsulated vibration absorbing device that can be operated.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係る液体封入式振動吸収装置は、弾性体を
含む中空状本体ボディの内部に仕切り用隔壁を介して
主，副二つの液室が形成されているとともに、それら
主，副二つの液室を連通させることにより振動付加時の
弾性体の変形に伴い圧縮される主液室内の封入液体の一
部を副液室側に流動させて主液室内の液圧変動を吸収す
る緩衝用オリフィスが設けられてなる液体封入式振動吸
収装置において、上記仕切り用隔壁が、複数枚の磁性体
板と、液体中に強磁性金属微粒子が分散され磁界の大き
さにより粘度が変化するように隣接磁性体板間に密封状
態に介在されたＭＲ流体との積層構造から構成されてい
るとともに、この積層構造の仕切り用隔壁の外周辺部に
は、上記ＭＲ流体の粘度変化のための磁界強さを調整可
能な電磁石が配設されていることを特徴とするものであ
る。In order to achieve the above-mentioned object, a liquid-filled vibration absorbing device according to the present invention comprises a main body and a sub-body through a partition wall inside a hollow main body including an elastic body. One liquid chamber is formed, and by connecting the two main and sub liquid chambers, a part of the sealed liquid in the main liquid chamber which is compressed due to the deformation of the elastic body when vibration is applied is partly connected to the sub liquid chamber. In a liquid-filled vibration absorbing device provided with a buffer orifice that absorbs fluctuations in the liquid pressure in the main liquid chamber by flowing the liquid into the main liquid chamber, the partition wall includes a plurality of magnetic plates and a ferromagnetic metal in the liquid. It is composed of a laminated structure with MR fluid interposed in a sealed state between adjacent magnetic plates so that the fine particles are dispersed and the viscosity changes according to the magnitude of the magnetic field, and the outer periphery of the partition wall of this laminated structure The part contains the viscosity of the MR fluid. It is characterized in that the adjustable electromagnet a magnetic field strength for the changes is provided.
【０００９】上記のような特徴構成を有する本発明によ
れば、電磁石への通電（印加）電流のコントロールによ
り磁界強さを調整してＭＲ流体の粘度を増減変化させる
ことによって、積層構造の仕切り用隔壁の剛性及び振動
振幅を任意に、かつ、広い範囲に亘って可変することが
可能である。このように仕切り用隔壁自体に振動の共振
系、つまり、共振周波数の調整機能を持たせることによ
って、低周波数領域の振動作用下ではＭＲ流体の粘度を
最大にして仕切り用隔壁を剛体化することで、主液室内
の封入液体を緩衝用オリフィスを通して副液室に流動さ
せるという本来の液圧吸収作用によって振動を減衰する
一方、高周波数領域の振動作用下ではＭＲ流体の粘度調
整に伴い仕切り用隔壁自体の剛性を任意に変化させるこ
とで、共振周波数を広い範囲に亘ってきめ細かく調整
し、広範な高周波数領域の振動に対して十分な減衰効果
を発揮させることができる。According to the present invention having the above-described features, the partitioning of the laminated structure is achieved by adjusting the magnetic field intensity by controlling the current applied to the electromagnet to increase or decrease the viscosity of the MR fluid. The rigidity and vibration amplitude of the partition can be arbitrarily varied over a wide range. In this way, by providing the partitioning partition itself with a vibration resonance system, that is, a function of adjusting the resonance frequency, the viscosity of the MR fluid is maximized under the action of vibration in a low frequency range to make the partitioning partition rigid. The vibration is attenuated by the original liquid pressure absorption function of flowing the sealed liquid in the main liquid chamber through the buffer orifice to the sub liquid chamber, while under the vibration action in the high frequency range, the vibration is attenuated due to the viscosity adjustment of the MR fluid. By arbitrarily changing the rigidity of the partition wall itself, the resonance frequency can be finely adjusted over a wide range, and a sufficient damping effect can be exerted on vibrations in a wide range of high frequencies.
【００１０】特に、積層構造の仕切り用隔壁に、ＭＲ流
体層を積層方向に少なくとも二つ以上備えさせることに
よって、仕切り用隔壁の剛性及び振動振幅の可変範囲、
すなわち、共振周波数の調整範囲を広げるとともに、
主，副二つの液室の体積弾性率を応答性よく変更させる
ことが可能となり、高周波数領域の振動に対する減衰性
能を一層向上することができる。[0010] In particular, by providing at least two or more MR fluid layers in the laminating direction in the partition walls having a laminated structure, a variable range of rigidity and vibration amplitude of the partition walls can be obtained.
That is, while extending the adjustment range of the resonance frequency,
The bulk modulus of the main and sub liquid chambers can be changed with good responsiveness, and the damping performance against vibration in a high frequency range can be further improved.
【００１１】また、上記の液体封入式振動吸収装置にお
ける積層構造の仕切り用隔壁を構成する複数枚の磁性体
板のうち、主液室及び副液室に臨む磁性体板を薄肉に形
成することによって、それら主，副両液室に臨む磁性体
板を弾性膜のように制御することが可能となり、ＭＲ流
体の粘度変化に伴う仕切り用隔壁全体の剛性及び振動振
幅の変化と各弾性膜（薄肉磁性体板）個々の剛性変化と
が相乗して高周波数領域の振動減衰性能を一段と向上す
ることができる。In the above-mentioned liquid-filled type vibration absorbing device, the magnetic plates facing the main liquid chamber and the sub liquid chamber are formed to be thin among a plurality of magnetic plates constituting the partition wall of the laminated structure. This makes it possible to control the magnetic plate facing the main and sub liquid chambers like an elastic film, and to change the rigidity and vibration amplitude of the entire partition wall due to the change in the viscosity of the MR fluid, and to change the elastic film ( (Thin magnetic plate) The change in individual stiffness is synergistic, and the vibration damping performance in the high frequency region can be further improved.
【００１２】さらに、上記の液体封入式振動吸収装置に
おいて、主液室及び副液室に臨む磁性体板の一方もしく
は両方を弾性体を介して支持させることによっても、そ
の磁性体板自体の剛性の可変範囲を広げて減衰周波数範
囲をより拡大することができる。Further, in the above-described liquid-filled vibration absorbing device, one or both of the magnetic plates facing the main liquid chamber and the sub-liquid chamber may be supported via an elastic body, so that the rigidity of the magnetic plate itself can be improved. Can be expanded to further expand the attenuation frequency range.
【００１３】なお、上記仕切り用隔壁、その外周辺部に
環状に配設される電磁石は、円形であることが望ましい
が、円形に限らず、楕円形や矩形であってもよく、ま
た、ＭＲ流体層は、円形でも、楕円形、矩形、ドーナツ
形であってもよい。It is desirable that the above-mentioned partitioning partition and the electromagnet arranged annularly around its outer periphery are circular, but not limited to a circle, and may be elliptical or rectangular. The fluid layer may be circular, oval, rectangular, donut shaped.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施例を図面にも
とづいて説明する。図１は実施例１の液体封入式振動吸
収装置の縦断面構造を示し、この液体封入式振動吸収装
置は、自動車用エンジン等の振動発生源側に取付け可能
な取付金具１と、環状形の主金具２と、これら両金具
１，２間に連結された円錐形状の本体弾性ゴム３と、自
動車用フレーム等の振動受部側に取付け可能な環状形の
取付け部材４と、この取付け部材４と主金具２とを固定
連結する磁性体からなるシリンダ状部材５と、上記取付
け部材４内に張設保持されたダイヤフラム６とにより中
空状の本体ボディ７が構成されている。この本体ボディ
７におけるシリンダ状部材５の内部に円形の仕切り用隔
壁８を設置することにより該仕切り用隔壁８の上下に
主，副二つの液室１０，９が区画形成されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a longitudinal sectional structure of a liquid-filled vibration absorbing device according to a first embodiment. This liquid-filled vibration absorbing device has a mounting bracket 1 that can be mounted on a vibration source such as an automobile engine, and a ring-shaped vibration absorbing device. A main metal fitting 2, a conical body elastic rubber 3 connected between the two metal fittings 1 and 2, an annular mounting member 4 attachable to a vibration receiving portion side of an automobile frame or the like; A hollow main body 7 is constituted by a cylindrical member 5 made of a magnetic material and fixedly connected to the main fitting 2 and a diaphragm 6 stretched and held in the mounting member 4. By disposing a circular partition wall 8 inside the cylindrical member 5 of the main body 7, two main and sub liquid chambers 10 and 9 are defined above and below the partition wall 8.
【００１５】上記主，副二つの液室１０，９間には、両
液室１０，９を相互に連通し、振動付加時の弾性ゴム３
の弾性変形に伴い圧縮される主液室１０内の封入液体の
一部を副液室９側に流動させて主液室１０内の液圧変動
をダイヤフラム６の変形と相俟って吸収する緩衝用オリ
フィス１１が設けられている。Between the two main and sub liquid chambers 10, 9, the two liquid chambers 10, 9 are communicated with each other, and the elastic rubber 3 when vibration is applied.
A part of the sealed liquid in the main liquid chamber 10 which is compressed due to the elastic deformation of the main liquid chamber 10 flows to the sub liquid chamber 9 side to absorb the fluctuation of the liquid pressure in the main liquid chamber 10 together with the deformation of the diaphragm 6. A buffer orifice 11 is provided.
【００１６】上記のような基本構成を有する液体封入式
振動吸収装置において、上記仕切り用隔壁８は、図２に
明示するように、厚み方向の中央に位置する肉厚の磁性
体板８Ａと、それの表裏両側で主液室１０及び副液室９
にそれぞれ臨むように配置された薄肉の磁性体板８Ｃ，
８Ｂと、これら薄肉の各磁性体板８Ｃ，８Ｂと中央の肉
厚磁性体板８Ａとの間に密封状態に介在されたＭＲ流体
１２Ｂ，１２Ａとの積層構造から構成されている。In the liquid-filled vibration absorbing device having the above-described basic configuration, the partitioning partition 8 has a thick magnetic plate 8A located at the center in the thickness direction, as shown in FIG. Main liquid chamber 10 and sub liquid chamber 9 on both sides
, The thin magnetic plates 8C,
8B, and a laminated structure of MR fluids 12B, 12A hermetically interposed between these thin magnetic plates 8C, 8B and the central thick magnetic plate 8A.
【００１７】上記積層構造からなる仕切り用隔壁８は、
中央の肉厚磁性体板８Ａの外周縁部表裏において非磁性
体もしくは弱磁性体部材１３Ｂ，１３Ａを介して後述す
る電磁石用ヨーク部材１４Ｂ，１４Ａに結合支持されて
いるとともに、両側の薄肉磁性体板８Ｃ，８Ｂは、それ
らの外周縁部においてゴムエラストマーやコイルばね等
の弾性体１５Ｂ，１５Ａを介して上記ヨーク部材１４
Ｂ，１４Ａに支持されている。また、中央の肉厚磁性体
板８Ａには、ＭＲ流体１２Ｂ，１２Ａ同士を連通接続す
るオリフィス１６が形成されている。なお、オリフィス
１６は無くてもよい。The partition wall 8 having the above-mentioned laminated structure is
The outer peripheral edge of the central thick magnetic plate 8A is connected and supported by electromagnet yoke members 14B, 14A described later via non-magnetic or weak magnetic members 13B, 13A, and the thin magnetic members on both sides. The plates 8C and 8B are connected to the yoke member 14 via elastic bodies 15B and 15A such as rubber elastomers and coil springs at their outer peripheral edges.
B, 14A. An orifice 16 is formed in the center thick magnetic plate 8A to connect the MR fluids 12B and 12A to each other. Note that the orifice 16 may not be provided.
【００１８】上記積層構造の仕切り用隔壁８の外周辺部
には、電磁石１７が仕切り用隔壁８と同芯状態で円環状
に配設されており、この電磁石１６の両極部に接続され
たヨーク部材１４Ｂ，１４Ａが本体ボディ７におけるシ
リンダ状部材５の上下端面に固定されており、これらヨ
ーク部材１４Ｂ，１４Ａ、磁性体板８Ｃ，８Ａ，８Ｂ、
ＭＲ流体１２Ｂ，１２Ａ及びシリンダ状部材５によって
形成される磁路を介して電磁石１７への通電電流のコン
トロールによりＭＲ流体１２Ｂ，１２Ａの粘度変化のた
めの磁界強さが調整可能に構成されている。An electromagnet 17 is arranged in an annular shape coaxially with the partition wall 8 around the outer periphery of the partition wall 8 having the above-mentioned laminated structure, and a yoke connected to both poles of the electromagnet 16 is provided. The members 14B, 14A are fixed to the upper and lower end surfaces of the cylindrical member 5 in the main body 7, and these yoke members 14B, 14A, the magnetic plates 8C, 8A, 8B,
The magnetic field strength for changing the viscosity of the MR fluids 12B, 12A can be adjusted by controlling the current supplied to the electromagnet 17 via the magnetic path formed by the MR fluids 12B, 12A and the cylindrical member 5. .
【００１９】なお、上記緩衝用オリフィス１１は、主液
室１０に開口接続するように一方のヨーク部材１４Ｂに
形成された通路１１ａと、この通路１１ａに対して、例
えば１８０°の位相角を持たせて副液室９に開口接続す
るように他方のヨーク部材１４Ａに形成された通路１１
ｂと、これら両通路１１ａ，１１ｂに両端が接続される
ようにシリンダ状部材５に半円環状に形成された通路１
１ｃとにより構成されている。また、上記ＭＲ流体１２
Ｂ，１２Ａは、高濃度の懸濁液中に１〜１０μｍ程度の
粒子径をもつ強磁性金属微粒子を分散させてなるビンガ
ム流体で、−４０〜１５０℃の作動温度域を有し磁界強
さの大きさによって粘度が変化するものであり、磁気粘
性流体あるいは磁気流動学的流体と呼ばれている。The buffer orifice 11 has a passage 11a formed in one yoke member 14B so as to open and connect to the main liquid chamber 10, and has a phase angle of, for example, 180 ° with respect to the passage 11a. Passage 11 formed in the other yoke member 14A so as to open and connect to the sub liquid chamber 9.
b and a passage 1 formed in a semi-annular shape in the cylindrical member 5 so that both ends are connected to these two passages 11a and 11b.
1c. The MR fluid 12
B and 12A are Bingham fluids in which ferromagnetic metal fine particles having a particle diameter of about 1 to 10 μm are dispersed in a high-concentration suspension, and have an operating temperature range of −40 to 150 ° C. and a magnetic field strength of The viscosity changes depending on the size of the fluid, and is called a magnetorheological fluid or a magnetorheological fluid.
【００２０】上記構成の液体封入式振動吸収装置におい
て、低周波数領域の振動が作用する条件下では、電磁石
スイッチ（図示省略）をＯＮにして電磁石１７へ通電
し、磁路に形成される磁界強さを大きく調整してＭＲ流
体１２Ｂ，１２Ａの粘度を最大に増大させることより積
層構造の仕切り用隔壁８が剛体化される。この状態で
は、振動付加に伴い圧縮される主液室１０内の封入液体
が緩衝用オリフィス１１を通過して副液室９側に流動さ
れるという本来の液圧変動吸収作用により低周波数領域
の振動を十分に減衰することができる。In the liquid-filled type vibration absorbing device having the above-mentioned structure, under the condition that the vibration in the low frequency region acts, the electromagnet switch (not shown) is turned on to energize the electromagnet 17, and the magnetic field formed in the magnetic path is increased. The partition walls 8 of the laminated structure are made rigid by adjusting the height to increase the viscosity of the MR fluids 12B and 12A to the maximum. In this state, the enclosed liquid in the main liquid chamber 10 compressed by the vibration is passed through the buffer orifice 11 and flows to the sub liquid chamber 9 side. Vibration can be sufficiently attenuated.
【００２１】一方、高周波数領域の振動が作用する条件
下では、電磁石スイッチをＯＦＦにして電磁石１７への
通電を停止、あるいは、電磁石スイッチをＯＮにして電
磁石１７への通電電流をコントロールして、磁路に形成
される磁界強さをゼロ、あるいは、その大きさを調整し
てＭＲ流体１２Ｂ，１２Ａの粘度を増減変化させること
により仕切り用隔壁８全体の剛性及び振動振幅を任意
に、かつ、広い範囲に亘って可変することが可能となる
だけでなく、主，副両液室１０，９に臨む薄肉磁性体板
８Ｃ，８Ｂ自体も個々に弾性膜のように剛性変化させる
ことが可能となり、これによって、仕切り用隔壁８の共
振周波数を広い範囲に亘ってきめ細かく調整し、広範な
高周波数領域の振動に対して十分大きな減衰効果を発揮
させることができる。On the other hand, under the condition that the vibration in the high frequency range acts, the electromagnet switch is turned off to stop the energization to the electromagnet 17, or the electromagnet switch is turned on to control the energization current to the electromagnet 17, The rigidity and vibration amplitude of the entire partition wall 8 are arbitrarily set by reducing the strength of the magnetic field formed in the magnetic path to zero or adjusting the size to increase or decrease the viscosity of the MR fluids 12B and 12A. Not only can it be changed over a wide range, but also the rigidity of the thin magnetic plates 8C and 8B facing the main and sub liquid chambers 10 and 9 can be individually changed like an elastic film. Thereby, the resonance frequency of the partition wall 8 can be finely adjusted over a wide range, and a sufficiently large damping effect can be exerted on vibration in a wide range of high frequencies.
【００２２】図３は実施例２の液体封入式振動吸収装置
の縦断面構造、図４は実施例３の液体封入式振動吸収装
置の縦断面構造を示し、これら実施例２及び３では、仕
切り用隔壁８における中央の肉厚磁性体板８Ａとその両
側の薄肉磁性体板８Ｃ，８Ｂとの間に密封状態に介在さ
れるＭＲ流体１２Ｂ，１２Ｃの使用量を節減するよう
に、ＭＲ流体１２Ｂ，１２Ａをドーナツ形状に介在させ
たものであり、実施例２では、中央の肉厚磁性体板８Ａ
とその両側の薄肉磁性体板８Ｃ，８Ｂとの中央部分間に
円筒形の伸縮膜１８Ｂ，１８Ａを張設し、実施例３では
円筒形のゴム弾性体１９Ｂ，１９Ａを介在させ、これら
円筒形伸縮膜１８Ｂ，１８Ａや円筒形ゴム弾性体１９
Ｂ，１９Ａの内部を空気層にしている点で実施例１と相
違し、その他の構成は実施例１と同様であるため、該当
部分に同一の符号を付してそれらの詳しい構造説明は省
略する。FIG. 3 shows a longitudinal sectional structure of the liquid-filled vibration absorbing device of the second embodiment, and FIG. 4 shows a longitudinal sectional structure of the liquid-filled vibration absorbing device of the third embodiment. The MR fluid 12B is provided so as to reduce the amount of use of the MR fluids 12B, 12C hermetically interposed between the thick magnetic plate 8A at the center and the thin magnetic plates 8C, 8B on both sides of the central magnetic plate 8A. , 12A in a donut shape. In the second embodiment, the central thick magnetic plate 8A
In the third embodiment, cylindrical elastic films 18B and 18A are stretched between central portions of thin magnetic plates 8C and 8B on both sides thereof, and cylindrical elastic elastic bodies 19B and 19A are interposed in the third embodiment. Elastic films 18B, 18A and cylindrical rubber elastic body 19
B and 19A are different from the first embodiment in that an air layer is formed inside, and other configurations are the same as those of the first embodiment. I do.
【００２３】図５は実施例４の液体封入式振動吸収装置
の縦断面構造を示し、この実施例４では、仕切り用隔壁
８における中央の肉厚磁性体板８Ａの表裏両面に凹凸部
８ａを形成してＭＲ流体１２Ｂ，１２Ａの層厚さに変化
を付けることにより、磁束を凹凸部８ａのうち複数の凸
部に集中させて通電電流のコントロールによるＭＲ流体
１２Ｂ，１２Ａの粘度変化を効率よく行なえるようにし
ている点で実施例１と相違し、その他の構成は実施例１
と同様であるため、該当部分に同一の符号を付してそれ
らの詳しい構造説明は省略する。FIG. 5 shows a vertical cross-sectional structure of a liquid-filled vibration absorbing device according to a fourth embodiment. In the fourth embodiment, uneven portions 8a are formed on both front and back surfaces of a thick magnetic plate 8A at the center of a partition 8 for partitioning. By forming and changing the layer thicknesses of the MR fluids 12B and 12A, the magnetic flux is concentrated on a plurality of convex portions of the concave and convex portions 8a, so that the viscosity change of the MR fluids 12B and 12A by controlling the conduction current can be efficiently performed. This embodiment is different from the first embodiment in that it can be performed.
Therefore, the same reference numerals are given to the corresponding parts, and the detailed description of those parts is omitted.
【００２４】図６は実施例５の液体封入式振動吸収装置
の縦断面構造を示し、この実施例５では、仕切り用隔壁
８における中央の肉厚磁性体板８Ａの重心部に空隙２０
を設けると共に、各ＭＲ流体１２Ｂ，１２Ａの介在層を
弾性ゴムシール２１により水平方向で分割している点で
実施例１と相違し、その他の構成は実施例１と同様であ
るため、該当部分に同一の符号を付してそれらの詳しい
構造説明は省略する。FIG. 6 shows a longitudinal sectional structure of a liquid-filled vibration absorbing device according to a fifth embodiment. In the fifth embodiment, a gap 20 is formed at the center of gravity of the thick magnetic plate 8A at the center of the partition wall 8.
Is different from the first embodiment in that the intervening layers of the MR fluids 12B and 12A are divided in the horizontal direction by the elastic rubber seal 21. Other configurations are the same as those in the first embodiment. The same reference numerals are given and detailed description of those structures is omitted.
【００２５】図７は実施例６の液体封入式振動吸収装置
の縦断面構造を示し、この実施例６では、仕切り用隔壁
８を、厚み方向の中央に位置する磁性体板８Ａと、それ
の表裏両側において主液室１０及び副液室９に臨むよう
に配置された薄肉磁性体板８Ｃ，８Ｂと、これら薄肉磁
性体板８Ｃ，８Ｂと中央の磁性体板８Ａとの間にそれぞ
れ配置したもう一つの薄肉磁性体板８Ｅ，８Ｄと、これ
ら薄肉磁性体板８Ｅ，８Ｄと中央の肉厚磁性体板８Ａと
の間及び隣接する薄肉磁性体板８Ｃ，８Ｅ、８Ｂ，８Ｄ
間にそれぞれ密封状態に介在されたＭＲ流体１２Ｄ，１
２Ｃ，１２Ｂ，１２Ａとの積層構造から構成して、上記
実施例１〜５に比べて仕切り用隔壁８全体の剛性及び振
動振幅の可変範囲を大きくしたものであり、その他の構
成は実施例１と同様であるため、該当部分に同一の符号
を付してそれらの詳しい構造説明は省略する。FIG. 7 shows a vertical cross-sectional structure of a liquid-filled vibration absorbing device according to a sixth embodiment. In the sixth embodiment, a partition wall 8 is formed by a magnetic plate 8A located at the center in the thickness direction and a magnetic plate 8A. Thin magnetic plates 8C and 8B arranged so as to face the main liquid chamber 10 and the sub liquid chamber 9 on both front and rear sides, respectively, and are disposed between the thin magnetic plates 8C and 8B and the central magnetic plate 8A. Another thin magnetic plate 8E, 8D, and thin magnetic plates 8C, 8E, 8B, 8D between and adjacent to the thin magnetic plates 8E, 8D and the central thick magnetic plate 8A.
MR fluids 12D, 1 interposed in a sealed state between them
It is configured by a laminated structure of 2C, 12B, and 12A to increase the rigidity of the entire partition wall 8 and the variable range of the vibration amplitude as compared with the first to fifth embodiments. Therefore, the same reference numerals are given to the corresponding parts, and the detailed description of those parts is omitted.
【００２６】上記実施例２〜実施例６のいずれの液体封
入式振動吸収装置においても、低周波数領域の振動に対
しては、振動付加に伴い圧縮される主液室１０の封入液
体が緩衝用オリフィス１１を通過して副液室９側に流動
し主液室１０内の液圧変動を吸収するといった液体封入
式振動吸収装置本来の作用によって大きな減衰係数が得
られ、また、高周波数領域の振動に対しては、仕切り用
隔壁８全体の剛性及び振動振幅を任意に、かつ、広い範
囲に亘って可変し、仕切り用隔壁８の共振周波数を広い
範囲に亘ってきめ細かく調整し、広範な高周波数領域の
振動に対して十分大きな減衰効果を発揮すといったよう
に、実施例１とほぼ同様な振動低減効果を発揮させるこ
とが可能である。In any of the liquid-filled vibration absorbing devices of the above-described second to sixth embodiments, the liquid enclosed in the main liquid chamber 10 that is compressed with the addition of vibration is buffered against vibration in the low frequency range. A large damping coefficient is obtained by the inherent action of the liquid-filled vibration absorbing device, which flows through the orifice 11 to the sub-liquid chamber 9 and absorbs the fluctuation of the liquid pressure in the main liquid chamber 10. With respect to vibration, the rigidity and vibration amplitude of the entire partition wall 8 can be arbitrarily varied over a wide range, and the resonance frequency of the partition wall 8 can be finely adjusted over a wide range. It is possible to exhibit substantially the same vibration reduction effect as in the first embodiment, such as exhibiting a sufficiently large damping effect on vibration in the frequency domain.
【００２７】なお、上記各実施例においては、主液室１
０側に臨む磁性体板８Ｃと副液室９側に臨む磁性体板８
Ｂの厚みが同一のもので示したが、両者８Ｃ，８Ｂの厚
みや大きさ（径）を変えてもよい。また、上記各実施例
では、ＭＲ流体１２Ｂ，１２Ａの層を互いに連通接続す
るオリフィス１６を１個以上設けているが、このオリフ
ィスは設けなくてもよい。In each of the above embodiments, the main liquid chamber 1
The magnetic plate 8C facing the zero side and the magnetic plate 8 facing the sub liquid chamber 9 side
Although the thickness of B is shown as being the same, the thickness and size (diameter) of both 8C and 8B may be changed. Further, in each of the above embodiments, one or more orifices 16 for connecting the layers of the MR fluids 12B and 12A to each other are provided, but this orifice may not be provided.
【００２８】[0028]
【発明の効果】以上のように、本発明によれば、主液室
と副液室とを仕切る隔壁が、電磁石への通電（印加）電
流のコントロールを介しての磁界強さの調整により粘度
を任意に増減変化させることが可能なＭＲ流体と複数枚
の磁性体板との積層構造から構成されているので、振動
周波数に対応して仕切り用隔壁の剛性及び振動振幅を任
意に、かつ、広い範囲に亘って可変するといったよう
に、仕切り用隔壁自体に共振周波数の調整機能を持たせ
ることができる。したがって、低周波数領域の振動作用
下では仕切り用隔壁の剛体化に伴い主液室内の封入液体
を緩衝用オリフィスを通して副液室に流動させるという
本来の液圧吸収作用によって振動を減衰することがで
き、しかも、高周波数領域の振動作用下では仕切り用隔
壁自体の剛性を任意に変化させることで、共振周波数を
広い範囲に亘ってきめ細かく調整し、広範な高周波数領
域の振動に対して十分な減衰効果を発揮させることがで
きるという効果を奏する。As described above, according to the present invention, the partition wall for separating the main liquid chamber and the sub liquid chamber has a viscosity by adjusting the magnetic field strength through the control of the current applied to the electromagnet. Is composed of a laminated structure of an MR fluid capable of arbitrarily increasing / decreasing and a plurality of magnetic plates, so that the rigidity and vibration amplitude of the partition wall can be arbitrarily set in accordance with the vibration frequency, and The partition wall itself can be provided with a function of adjusting the resonance frequency so that the partition wall itself can be varied over a wide range. Therefore, under the vibration action in the low frequency range, the vibration can be attenuated by the original hydraulic pressure absorbing action that the enclosed liquid in the main liquid chamber flows to the sub liquid chamber through the buffer orifice with the rigidization of the partition wall. In addition, under the action of vibration in the high frequency range, the resonance frequency can be finely adjusted over a wide range by arbitrarily changing the rigidity of the partition wall itself, and sufficient attenuation can be achieved for vibration in a wide range of high frequency range. The effect that the effect can be exhibited is produced.
【００２９】特に、請求項２〜４に記載のような構成を
採用することにより、広範な高周波数領域の振動に対す
る減衰性能を一層向上することができる。In particular, by adopting the configuration as described in the second to fourth aspects, it is possible to further improve the damping performance with respect to vibration in a wide range of high frequencies.
【図１】本発明に係る液体封入式振動吸収装置で、実施
例１の液体封入式振動吸収装置の縦断面構造図である。FIG. 1 is a vertical sectional structural view of a liquid-filled vibration absorbing device according to a first embodiment of the present invention.
【図２】図１の要部の拡大縦断面図である。FIG. 2 is an enlarged vertical sectional view of a main part of FIG.
【図３】本発明に係る液体封入式振動吸収装置で、実施
例２の液体封入式振動吸収装置の縦断面構造図である。FIG. 3 is a vertical sectional structural view of a liquid-filled vibration absorbing device according to a second embodiment of the present invention.
【図４】本発明に係る液体封入式振動吸収装置で、実施
例３の液体封入式振動吸収装置の縦断面構造図である。FIG. 4 is a vertical cross-sectional structural view of a liquid-filled vibration absorbing device according to a third embodiment of the present invention.
【図５】本発明に係る液体封入式振動吸収装置で、実施
例４の液体封入式振動吸収装置の縦断面構造図である。FIG. 5 is a vertical sectional structural view of a liquid-filled vibration absorbing device according to a fourth embodiment of the present invention.
【図６】本発明に係る液体封入式振動吸収装置で、実施
例５の液体封入式振動吸収装置の縦断面構造図である。FIG. 6 is a vertical sectional structural view of a liquid-filled vibration absorbing device according to a fifth embodiment of the present invention.
【図７】本発明に係る液体封入式振動吸収装置で、実施
例６の液体封入式振動吸収装置の縦断面構造図である。FIG. 7 is a longitudinal sectional structural view of a liquid-filled vibration absorbing device according to a sixth embodiment of the present invention.
３ 本体弾性ゴム ６ ダイヤフラム ７ 中空状本体ボディ ８ 仕切り用隔壁 ８Ａ〜８Ｅ 磁性体板 ９ 副液室 １０ 主液室 １１ 緩衝用オリフィス １２Ａ〜１２Ｄ ＭＲ流体 １５Ａ，１５Ｂ 弾性体 １７ 電磁石 REFERENCE SIGNS LIST 3 body elastic rubber 6 diaphragm 7 hollow body 8 partition wall 8A to 8E magnetic plate 9 auxiliary liquid chamber 10 main liquid chamber 11 buffer orifice 12A to 12D MR fluid 15A, 15B elastic body 17 electromagnet
Claims (4)
仕切り用隔壁を介して主，副二つの液室が形成されてい
るとともに、それら主，副二つの液室を連通させること
により振動付加時の弾性体の変形に伴い圧縮される主液
室内の封入液体の一部を副液室側に流動させて主液室内
の液圧変動を吸収する緩衝用オリフィスが設けられてな
る液体封入式振動吸収装置において、 上記仕切り用隔壁が、複数枚の磁性体板と、液体中に強
磁性金属微粒子が分散され磁界の大きさにより粘度が変
化するように隣接磁性体板間に密封状態に介在されたＭ
Ｒ流体との積層構造から構成されているとともに、 この積層構造の仕切り用隔壁の外周辺部には、上記ＭＲ
流体の粘度変化のための磁界強さを調整可能な電磁石が
配設されていることを特徴とする液体封入式振動吸収装
置。1. A main body and a sub liquid chamber are formed inside a hollow main body including an elastic body via a partition wall, and vibration is generated by connecting the main liquid and the sub liquid chamber to each other. Liquid filling provided with a buffer orifice that absorbs fluctuations in the liquid pressure in the main liquid chamber by flowing part of the liquid in the main liquid chamber that is compressed due to the deformation of the elastic body during addition to the sub liquid chamber side In the vibration-absorbing device, the partition walls are sealed between a plurality of magnetic plates, and between adjacent magnetic plates so that the ferromagnetic metal fine particles are dispersed in the liquid and the viscosity changes depending on the magnitude of the magnetic field. Interposed M
In addition to being composed of a laminated structure with the R fluid, the above-mentioned MR
An electromagnet capable of adjusting a magnetic field strength for changing a viscosity of a fluid is provided.
体の層を積層方向に少なくとも二つ以上備えられている
請求項１に記載の液体封入式振動吸収装置。2. The liquid-filled vibration absorbing device according to claim 1, wherein the partition wall of the laminated structure is provided with at least two or more MR fluid layers in the laminating direction.
複数枚の磁性体板のうち、主液室及び副液室に臨む磁性
体板が他の磁性体板よりも薄肉に形成されている請求項
１または２に記載の液体封入式振動吸収装置。3. A magnetic plate facing a main liquid chamber and a sub liquid chamber is formed to be thinner than other magnetic plates among a plurality of magnetic plates constituting a partition wall of the laminated structure. The liquid-filled vibration absorbing device according to claim 1.
複数枚の磁性体板のうち、少なくとも主液室および副液
室に臨む磁性体板の一方もしくは両方が、弾性体を介し
て支持されている請求項１ないし３のいずれかに記載の
液体封入式振動吸収装置。4. Among the plurality of magnetic plates constituting the partition wall of the laminated structure, at least one or both of the magnetic plates facing the main liquid chamber and the sub liquid chamber are supported via an elastic body. The liquid-filled vibration absorbing device according to claim 1, wherein
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| JP2001004777A JP3603029B2 (en) | 2001-01-12 | 2001-01-12 | Liquid filled vibration absorber |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007198541A (en) * | 2006-01-27 | 2007-08-09 | Tokai Rubber Ind Ltd | Fluid-sealed vibration isolating device |
| JP2012117668A (en) * | 2010-11-29 | 2012-06-21 | Hyundai Motor Co Ltd | Structure of orifice plate for engine mount filled with magnetorheological (mr) fluid |
| JP2012117666A (en) * | 2010-11-30 | 2012-06-21 | Hyundai Motor Co Ltd | Damping control device filled with magnetorheological (mr) fluid and engine mount having the same |
| KR20160000526A (en) * | 2014-06-24 | 2016-01-05 | 현대자동차주식회사 | Active engine-mount |
| KR101612374B1 (en) * | 2015-05-06 | 2016-04-27 | 현대자동차주식회사 | Active mount |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101298267B1 (en) | 2011-08-01 | 2013-08-22 | 현대자동차주식회사 | Orifice-plate for an engine-mount filled with the Magnetorheological fluid |
-
2001
- 2001-01-12 JP JP2001004777A patent/JP3603029B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007198541A (en) * | 2006-01-27 | 2007-08-09 | Tokai Rubber Ind Ltd | Fluid-sealed vibration isolating device |
| JP4623428B2 (en) * | 2006-01-27 | 2011-02-02 | 東海ゴム工業株式会社 | Fluid filled vibration isolator |
| JP2012117668A (en) * | 2010-11-29 | 2012-06-21 | Hyundai Motor Co Ltd | Structure of orifice plate for engine mount filled with magnetorheological (mr) fluid |
| JP2012117666A (en) * | 2010-11-30 | 2012-06-21 | Hyundai Motor Co Ltd | Damping control device filled with magnetorheological (mr) fluid and engine mount having the same |
| KR20160000526A (en) * | 2014-06-24 | 2016-01-05 | 현대자동차주식회사 | Active engine-mount |
| KR102105831B1 (en) * | 2014-06-24 | 2020-05-04 | 현대자동차주식회사 | Active engine-mount |
| KR101612374B1 (en) * | 2015-05-06 | 2016-04-27 | 현대자동차주식회사 | Active mount |
| US9709123B2 (en) | 2015-05-06 | 2017-07-18 | Hyundai Motor Company | Active mount |
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| JP3603029B2 (en) | 2004-12-15 |
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