JP3350166B2 - Electro-rheological fluid-filled mount - Google Patents
Electro-rheological fluid-filled mountInfo
- Publication number
- JP3350166B2 JP3350166B2 JP21367993A JP21367993A JP3350166B2 JP 3350166 B2 JP3350166 B2 JP 3350166B2 JP 21367993 A JP21367993 A JP 21367993A JP 21367993 A JP21367993 A JP 21367993A JP 3350166 B2 JP3350166 B2 JP 3350166B2
- Authority
- JP
- Japan
- Prior art keywords
- pair
- electrode plates
- communication passage
- electrorheological fluid
- communication path
- 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.)
- Expired - Fee Related
Links
Landscapes
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Combined Devices Of Dampers And Springs (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば自動車のエンジ
ンマウントなどに用いられ、電圧印加により防振特性を
変更制御し得る電気粘性流体封入式マウントに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrorheological fluid-filled mount used for, for example, an engine mount of an automobile and capable of changing and controlling vibration damping characteristics by applying a voltage.
【０００２】[0002]
【従来の技術】従来より、この種の電気粘性流体封入式
マウントとして、電気粘性流体を封入した液室を仕切体
によって受圧室と平衡室とに仕切るとともに、この仕切
体に上記受圧室と平衡室とを互いに連通する連通路を形
成し、この連通路に一対の電極を相対向させて配設して
連通路を通る上記電気粘性流体の粘度を変更制御するも
のが知られている（例えば、特開昭６０−１０４８２８
号公報参照）。2. Description of the Related Art Conventionally, a liquid chamber filled with an electrorheological fluid has been partitioned into a pressure receiving chamber and an equilibrium chamber by a partition member as an electrorheological fluid-filled mount of this type. It is known to form a communication path that communicates with a chamber and to arrange a pair of electrodes in the communication path so as to face each other to change and control the viscosity of the electrorheological fluid passing through the communication path (for example, JP-A-60-104828
Reference).
【０００３】一方、上記のものにおいて印加電圧の変更
だけでは、変更し得る防振特性の範囲が狭く、自動車の
エンジンマウントに用いた場合、エンジンのシェイク振
動（１０〜２０Ｈｚの振動）の防振と、アイドル振動
（２０〜４０Ｈz の振動）の防振との両立が困難である
ことから、上記連通路を構成する仕切体の内壁面に、一
対の電極を相対向させて配置した第１オリフィスと、こ
のような電極を配置しない第２オリフィスとを形成した
ものが知られている（例えば、特開平１−１１２０４４
号公報参照）。このものにおいでは、上記仕切体を電気
絶縁性樹脂からなる２枚のプレート部材を互いに間隔を
隔てて重ね合わせることによりその相対向面間に連通路
を形成し、この２枚の樹脂プレート部材の相対向面間の
一部に電極を配設して第１オリフィスを、他部に電極を
配設しないようにして第２オリフィスをそれぞれ形成し
ている。そして、上記電極への通電の有無により電気粘
性流体が流動する断面積を第２オリフィスのみのとき
と、第１および第２オリフィスの双方のときとに切換制
御し得るようになっている。On the other hand, in the above-mentioned device, the range of the vibration damping characteristics which can be changed only by changing the applied voltage is narrow, and when used in an engine mount of an automobile, the vibration damping of the shake vibration (10-20 Hz vibration) of the engine is performed. It is difficult to achieve both the vibration and the idle vibration (vibration at 20 to 40 Hz). Therefore, the first orifice in which a pair of electrodes are arranged opposite to each other on the inner wall surface of the partition constituting the communication passage. And a second orifice in which such an electrode is not arranged are known (for example, Japanese Patent Application Laid-Open No. 1-112044).
Reference). In this device, the partition body is formed by stacking two plate members made of an electrically insulating resin at an interval from each other to form a communication path between the opposing surfaces, and the two resin plate members The first orifice is formed by disposing an electrode at a part between the opposing surfaces, and the second orifice is formed without disposing the electrode at the other part. The cross-sectional area of the flow of the electrorheological fluid can be switched between the case where only the second orifice is used and the case where both the first and second orifices are used, depending on whether or not the electrode is energized.
【０００４】[0004]
【発明が解決しようとする課題】ところが、上記従来の
電気粘性流体封入式マウントにおいては、仕切体に上記
の第１および第２オリフィスを形成するために、電気絶
縁性樹脂からなる２枚のプレート部材の各所定範囲にの
み電極を固定した後、両プレート部材を重ね合わすとい
う面倒な組付け作業を必要とする上、構成が複雑で部品
点数の増大を招くという問題がある。However, in the conventional electrorheological fluid-filled mount, two plates made of an electrically insulating resin are used to form the first and second orifices in the partition. After fixing the electrodes only in each predetermined range of the members, it is necessary to perform a troublesome assembling operation of superposing the two plate members, and there is a problem that the configuration is complicated and the number of parts is increased.
【０００５】一方、上記２枚のプレート部材を電気絶縁
性樹脂ではなく電極形成素材により形成して上記の電極
を省略することも考えられるが、このようにすると、部
品点数の低減化は図られるが、電圧印加により電気粘性
流体の流動可能範囲を変更制御するという本来の目的が
得られなくなる。[0005] On the other hand, it is conceivable to omit the above-mentioned electrodes by forming the above-mentioned two plate members from an electrode-forming material instead of an electrically insulating resin. However, in this case, the number of parts can be reduced. However, the original purpose of changing and controlling the flowable range of the electrorheological fluid by applying a voltage cannot be obtained.
【０００６】本発明は、このような事情に鑑みてなされ
たものであり、その目的とするところは、電気粘性流体
の流動状態を変化させ得る連通路部分と、電圧印加の有
無に拘らず電気粘性流体の流動状態が変化しない連通路
部分とを有する仕切体を単純な構成で形成して組付けの
容易化を図り、これにより、幅広い周波数領域の入力振
動に対して防振特性の切換制御を可能とすることにあ
る。[0006] The present invention has been made in view of such circumstances, and an object thereof is to provide a communication path portion capable of changing a flow state of an electrorheological fluid, and an electric circuit regardless of whether a voltage is applied or not. A partition having a communication path portion in which the flow state of the viscous fluid does not change is formed with a simple configuration to facilitate assembly, and thereby, switching control of vibration damping characteristics with respect to input vibration in a wide frequency range. Is to make it possible.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、請求項１記載の発明は、振動入力方向に所定距離を
隔てて配置された第１および第２の支持体と、これら第
１および第２の支持体を互いに連結する弾性支承体と、
この弾性支承体により上記振動入力方向の一側が画成さ
れ他側が弾性隔膜部材により画成されて内部に電気粘性
流体が封入された液室と、この液室を上記弾性支承体の
側の受圧室と上記弾性隔膜部材の側の平衡室とに仕切る
仕切体と、この仕切体に形成されて上記受圧室と平衡室
とを互いに連通する連通路とを備えたものを前提とす
る。このものにおいて、上記仕切体を、互いに所定間隔
を隔てて重ね合わされて相対向面間に上記連通路を形成
する一対の電極プレートと、この一対の電極プレートの
相対向面間を遮断して上記連通路を第１連通路と第２連
通路とに区画する絶縁部材とで構成する。そして、上記
第１連通路における上記一対の電極プレートの相対向面
間隔を、その一対の電極プレートへの電圧印加により上
記第１連通路を通る電気粘性流体の粘度を変更し得る電
界強度を発揮する距離に設定する一方、上記第２連通路
における上記一対の電極プレートの相対向面間隔を、そ
の一対の電極プレートに電圧印加しても上記第２連通路
を通る電気粘性流体の粘度が実質的に変化しない距離に
設定する構成とするものである。In order to achieve the above-mentioned object, according to the first aspect of the present invention, there are provided first and second supports arranged at a predetermined distance from each other in a vibration input direction, and the first and second supports are provided. And an elastic bearing connecting the second support to each other;
A liquid chamber in which one side of the vibration input direction is defined by the elastic bearing body and the other side is defined by an elastic diaphragm member, and an electrorheological fluid is sealed therein, and the liquid chamber is pressurized on the side of the elastic bearing body. It is assumed that the partition body is provided with a partition for partitioning the chamber into a balancing chamber on the side of the elastic diaphragm member, and a communication passage formed in the partition and communicating the pressure receiving chamber and the balancing chamber with each other. In this device, the partition body is overlapped with each other at a predetermined interval to form the communication path between the opposing surfaces, and a pair of electrode plates, and the pair of electrode plates are cut off from each other by opposing the opposing surfaces. The communication path includes an insulating member that partitions the communication path into a first communication path and a second communication path. An electric field strength capable of changing the distance between the opposing surfaces of the pair of electrode plates in the first communication passage by changing the viscosity of the electrorheological fluid passing through the first communication passage by applying a voltage to the pair of electrode plates. While the distance between the opposing surfaces of the pair of electrode plates in the second communication passage is set such that the viscosity of the electrorheological fluid passing through the second communication passage substantially increases even when a voltage is applied to the pair of electrode plates. The distance is set so that the distance does not change.
【０００８】請求項２記載の発明は、請求項１記載の発
明において、第２連通路における一対の電極プレートの
相対向面間隔を、一対の電極プレートへの最大印加電圧
により形成される電界強度が１ｋv ／ｍｍを超えない距
離に設定する構成とするものである。According to a second aspect of the present invention, in the first aspect of the invention, the distance between the opposing surfaces of the pair of electrode plates in the second communication passage is adjusted by the electric field intensity formed by the maximum voltage applied to the pair of electrode plates. Is set to a distance not exceeding 1 kv / mm.
【０００９】請求項３記載の発明は、請求項１記載の発
明において、第１連通路の断面積をＡ1 、その長さをＬ
1 とし、第２連通路の断面積をＡ2 、その長さをＬ2 と
した場合、これらＡ1 、Ａ2 、Ｌ1 、および、Ｌ2 を、 （Ａ2 ／Ｌ2 ）／（Ａ1 ／Ｌ1 ）＜１ を満足する値にそれぞれ設定する構成とするものであ
る。According to a third aspect of the present invention, in the first aspect of the present invention, the first communication passage has a cross-sectional area of A 1 and a length of L 1.
When the sectional area of the second communication passage is A2 and its length is L2, A1, A2, L1, and L2 satisfy (A2 / L2) / (A1 / L1) <1. It is configured to be set to each value.
【００１０】また、請求項４記載の発明は、請求項１記
載の発明において、第２連通路を、一対の電極プレート
の相対向面に開口する凹溝を形成することにより所定の
相対向面間隔に設定する構成とするものである。According to a fourth aspect of the present invention, in the first aspect of the present invention, the second communication passage is formed with a concave groove that is opened in the opposite surfaces of the pair of electrode plates, so that the predetermined opposite surface is formed. The interval is set.
【００１１】さらに、請求項５記載の発明は、請求項１
記載の発明において、第２連通路を、それぞれハット形
状に成形した金属薄板製の一対の電極プレートを互いに
重ね合わせて所定の相対向面間隔に設定する構成とする
ものである。Further, the invention described in claim 5 is the invention according to claim 1.
In the invention described in the above, the second communication path is configured to set a predetermined interval between opposed surfaces by overlapping a pair of electrode plates made of a thin metal plate each formed into a hat shape.
【００１２】[0012]
【作用】上記の構成により、請求項１記載の発明では、
一対の電極プレートへの電圧印加により、第１連通路で
は電界が形成されて第１連通路を通る電気粘性流体の粘
度が高められ、ついには第１連通路を通しての電気粘性
流体の流動が実質的に行われない状態となる。これに対
して、第２連通路では上記一対の電極プレートに電圧が
印加されてもこの第２連通路を通る電気粘性流体の粘性
は実質的に変化せず、受圧室と平衡室との間での電気粘
性流体の流動がこの第２連通路を通してのみ行われるこ
とになる。これにより、第２連通路を介しての液柱共振
によって入力振動の減衰が行われる。一方、上記一対の
電極プレートへの電圧印加を停止すると、上記受圧室と
平衡室との間での電気粘性流体の流動が上記第１および
第２の双方の連通路を通して行われ、これにより、双方
の連通路を介しての液柱共振によって入力振動の減衰が
行われる。従って、電圧印加の有無によって減衰の生じ
るピーク周波数や動ばね定数が低動ばね化される周波数
域が変化し、２種類の周波数域での防振特性が得られ
る。そして、このような電圧印加により電気粘性流体の
流動が制限される第１連通路と、電圧印加しても電気粘
性流体の流動状態が変化しない第２連通路とを有する仕
切体が一対の電極プレートを絶縁部材を介して重ね合わ
せるだけで形成されるために、従来のマウントのごとく
電気絶縁性樹脂からなる一対のプレート部材の所定範囲
にのみ電極を固定する場合と比べ、構成の簡略化が図ら
れて組付け作業の容易化、および、部品点数の低減化が
図られる。According to the above-mentioned structure, according to the first aspect of the present invention,
By applying a voltage to the pair of electrode plates, an electric field is formed in the first communication passage to increase the viscosity of the electrorheological fluid passing through the first communication passage, and finally the flow of the electrorheological fluid through the first communication passage is substantially reduced. It is in a state where it is not performed. On the other hand, in the second communication passage, even if a voltage is applied to the pair of electrode plates, the viscosity of the electrorheological fluid passing through the second communication passage does not substantially change, and the voltage between the pressure receiving chamber and the equilibrium chamber is changed. The flow of the electrorheological fluid at this time is performed only through this second communication passage. As a result, the input vibration is attenuated by the liquid column resonance via the second communication passage. On the other hand, when the application of the voltage to the pair of electrode plates is stopped, the flow of the electrorheological fluid between the pressure receiving chamber and the equilibrium chamber is performed through both the first and second communication paths. Input vibration is attenuated by liquid column resonance through both communication paths. Therefore, the frequency range in which the peak frequency at which the attenuation occurs and the dynamic spring constant is reduced by the presence or absence of the application of the voltage changes, and the vibration isolation characteristics in two kinds of frequency ranges can be obtained. A partition having a first communication path in which the flow of the electrorheological fluid is restricted by the application of the voltage and a second communication path in which the flow state of the electrorheological fluid does not change even when the voltage is applied is a pair of electrodes. Since the plates are formed by simply overlapping the plates with an insulating member interposed therebetween, the structure is simplified as compared with a conventional mount in which electrodes are fixed only within a predetermined range of a pair of plate members made of an electrically insulating resin. As a result, the assembling work is facilitated and the number of parts is reduced.
【００１３】請求項２記載の発明では、上記請求項１記
載の発明による作用に加えて、第２連通路における一対
の電極プレートの相対向面間隔が最大印加電圧に対し電
界強度が１ｋv ／ｍｍを超えない距離に設定されている
ため、上記一対の電極プレートに電圧を印加しても第２
連通路を通る電気粘性流体を実質的に増粘させることは
ない。このため、上記第１連通路での電気粘性流体の流
動を制限するために上記一対の電極プレートに電圧印加
しても、この一対の電極プレートにより形成された上記
第２連通路では電気粘性流体の流動が確実に確保され
る。According to a second aspect of the present invention, in addition to the function of the first aspect, the distance between the opposing surfaces of the pair of electrode plates in the second communication passage is such that the electric field strength is 1 kv / mm with respect to the maximum applied voltage. Is set so as not to exceed the distance between the first and second electrode plates.
It does not substantially thicken the electrorheological fluid passing through the communication passage. For this reason, even if a voltage is applied to the pair of electrode plates in order to restrict the flow of the electrorheological fluid in the first communication passage, the electrorheological fluid is formed in the second communication passage formed by the pair of electrode plates. Flow is ensured.
【００１４】請求項３記載の発明によれば、上記請求項
１記載の発明による作用に加えて、同じ一対の電極プレ
ートにより形成される第１連通路と第２連通路とのそれ
ぞれの断面積および長さが所定の関係、すなわち、第１
連通路の断面積をその長さで除した値に対する、第２連
通路の断面積をその長さで除した値の比が１より小さく
なるように関係付けられているため、一対の電極への電
圧印加の制御により確実に２種類の周波数領域での防振
特性が得られる。According to the third aspect of the present invention, in addition to the function of the first aspect of the present invention, the respective sectional areas of the first communication passage and the second communication passage formed by the same pair of electrode plates. And the length is in a predetermined relationship, ie, the first
Since the ratio of the value obtained by dividing the sectional area of the second communication path by its length to the value obtained by dividing the sectional area of the communication path by its length is smaller than 1, the relationship is established between the pair of electrodes. By controlling the voltage application, the anti-vibration characteristics in two kinds of frequency ranges can be obtained reliably.
【００１５】また、請求項４記載の発明によれば、上記
請求項１記載の発明による作用に加えて、一対の電極プ
レートの相対向面に凹溝を形成するだけで所定の相対向
面間隔を有する第２連通路の形成が容易に行われる。According to a fourth aspect of the present invention, in addition to the function of the first aspect, a predetermined gap between the opposing surfaces can be obtained simply by forming a groove in the opposing surfaces of the pair of electrode plates. Is easily formed.
【００１６】さらに、請求項５記載の発明によれば、上
記請求項１記載の発明による作用に加えて、一対の電極
プレートをプレス成形することにより所定の相対向面間
隔を有する第２連通路の形成が容易に行われる。According to a fifth aspect of the present invention, in addition to the function of the first aspect of the present invention, the second communication passage having a predetermined distance between the opposing surfaces is formed by press-forming a pair of electrode plates. Is easily formed.
【００１７】[0017]
【実施例】以下、本発明の実施例を図面に基いて説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１８】図１は、本発明の第１実施例に係る電気粘
性流体封入式マウントを示し、１は振動入力方向一側
（同図の上側）に配置された第１支持体、２はこの第１
支持体１から所定距離隔てられ筒軸Ｘを振動入力方向に
向けて振動入力方向他側（同図の下側）に配置された筒
状の第２支持体、３はこの第２支持体２と上記第１支持
体１とを互いに連結する環状の弾性支承体、４はこの弾
性支承体３との間に液室５を形成する弾性隔膜部材とし
てのゴム薄膜製のダイヤフラム、６は上記液室５を上下
２つの室５ａ，５ｂに仕切る仕切体である。FIG. 1 shows an electrorheological fluid-filled mount according to a first embodiment of the present invention. Reference numeral 1 denotes a first support disposed on one side of the vibration input direction (upper side in FIG. 1); First
The cylindrical second support 3 is disposed at a predetermined distance from the support 1 and is disposed on the other side (the lower side in the figure) in the vibration input direction with the cylinder axis X facing the vibration input direction. An annular elastic support member 4 for connecting the first support 1 and the first support 1 to each other, a diaphragm 4 made of a rubber thin film as an elastic diaphragm member for forming a liquid chamber 5 between the elastic support 3 and the elastic support 3, This is a partition body that partitions the chamber 5 into two upper and lower chambers 5a and 5b.
【００１９】上記第１支持体１は、板部材１ａと、この
板部材１ａから上記筒軸Ｘに沿って上向きに突出する連
結ボルト１ｂと、上記板部材１ａから下方に突出する有
底筒部材１ｃとから構成されている。そして、上記連結
ボルト１ｂを介して、上記第１支持体１は、振動発生源
側である、例えばエンジン側に連結されるようになって
いる。また、上記筒部材１ｃの外周面と上記第２支持体
２を構成する支持筒部材７の上端開口縁７ａの内周面と
の間にゴムの一体加硫成形によって上記弾性支承体３が
円錐台状に形成されており、この弾性支承体３によって
上記第１支持体１が上記第２支持体２に対して弾性的に
支承されている。The first support 1 includes a plate member 1a, a connecting bolt 1b projecting upward from the plate member 1a along the cylinder axis X, and a bottomed cylindrical member projecting downward from the plate member 1a. 1c. Then, the first support 1 is connected to the vibration source side, for example, the engine side, via the connection bolt 1b. The elastic bearing member 3 is conical by integral vulcanization molding of rubber between the outer peripheral surface of the cylindrical member 1c and the inner peripheral surface of the upper opening edge 7a of the supporting cylindrical member 7 constituting the second supporting member 2. The first support 1 is elastically supported by the elastic support 3 with respect to the second support 2.
【００２０】上記第２支持体２は、上記支持筒部材７
と、この支持筒部材７の下側に配置された有底筒状のカ
ップ状部材８と、上記支持筒部材７の下端フランジ部７
ｂと上記カップ状部材８の上端フランジ部８ａとを互い
に連結して一体化する固定ボルト９，９，…とを備えて
おり、上記カップ状部材８に下向きに突出して固定され
た連結ボルト８ｂにより、振動受部である、例えば車体
側に連結されるようになっている。そして、上記一対の
フランジ部７ｂ，８ａの間に上記仕切体６の外周縁部６
ａおよび上記ダイヤフラム４の外周縁部が挟まれた状態
で上記固定ボルト９，９，…により位置固定されてお
り、上記ダイヤフラム４、弾性支承体３および支持筒部
材７により仕切られた密閉空間内に、電界によって粘性
が変化する電気粘性流体（Electric Rheological Flui
d）Ｅが封入されて上記液室５が形成されている。この
液室５が上記仕切体６により２つに仕切られ、弾性支承
体３の変形により圧力を受ける受圧室５ａがこの仕切体
６の上側に、平衡室５ｂが下側にそれぞれ形成されてい
る。なお、上記下端フランジ部７ｂの内周面には上記弾
性支承体３から延びるゴム薄膜３ａが加硫接着されてお
り、このゴム薄膜３ａおよび上記ダイヤフラム４によっ
て上記仕切体６と一対のフランジ部７ｂ，８ａとの間の
シールが行われるようになっている。また、図中８ｃは
空気抜きであり、カップ状部材８の周壁部に開けられて
ダイヤフラム４の自由な変形を保証するものである。The second support 2 is provided with the support cylinder member 7.
A bottomed cylindrical cup-shaped member 8 disposed below the support cylinder member 7, and a lower end flange 7 of the support cylinder member 7.
b and the upper end flange 8a of the cup-shaped member 8 are connected to each other and integrated therewith, and are provided with connecting bolts 8b fixed to the cup-shaped member 8 by protruding downward. Accordingly, the vibration receiving portion is connected to, for example, a vehicle body. The outer peripheral edge 6 of the partition body 6 is located between the pair of flanges 7b and 8a.
are fixed by the fixing bolts 9, 9,... in a state where the outer peripheral edge of the diaphragm 4 and the outer peripheral edge of the diaphragm 4 are sandwiched, and in an enclosed space partitioned by the diaphragm 4, the elastic bearing member 3, and the support cylinder member 7. In addition, an electric rheological fluid whose viscosity changes with an electric field
d) E is sealed to form the liquid chamber 5. The liquid chamber 5 is partitioned into two by the partition body 6, and a pressure receiving chamber 5a which receives pressure due to deformation of the elastic bearing body 3 is formed above the partition body 6, and an equilibrium chamber 5b is formed below. . A rubber thin film 3a extending from the elastic bearing member 3 is vulcanized and adhered to the inner peripheral surface of the lower end flange portion 7b. , 8a. In the drawing, reference numeral 8c denotes an air vent, which is opened on the peripheral wall of the cup-shaped member 8 to ensure free deformation of the diaphragm 4.
【００２１】上記仕切体６は、互いに所定間隔を隔てて
重ね合わされた上下一対の電極プレート１０，１１と、
この一対の電極プレート１０，１１の相対向面間に介装
されて両者１０，１１間および固定ボルト９，９，…と
の間を絶縁するシリコンラバーなどからなる絶縁部材１
２と、この絶縁部材１２により上記相対向面間が区画さ
れて形成された２つの連通路１３，１４とを備えてい
る。上記一対の電極プレート１０，１１は共に相対向面
がそれぞれ平面とされ、仕切体６の外周縁部６ａが比較
的薄肉に、中央部６ｂが比較的厚肉となるよう形成され
ている。そして、上記一対の電極プレート１０，１１
は、互いに異なる側に突出した各突片１０ａ，１１ａに
より電源と接続されて、所定の電圧が印加されるように
なっている。The partition body 6 includes a pair of upper and lower electrode plates 10 and 11 which are superposed at a predetermined interval from each other.
An insulating member 1 made of silicon rubber or the like which is interposed between the opposing surfaces of the pair of electrode plates 10 and 11 and insulates between the two 10, 11 and the fixing bolts 9, 9,.
2 and two communication paths 13 and 14 formed by partitioning the opposing surfaces by the insulating member 12. Both of the pair of electrode plates 10 and 11 are formed so that the opposing surfaces are each flat, and the outer peripheral edge 6a of the partition 6 is relatively thin and the central portion 6b is relatively thick. Then, the pair of electrode plates 10 and 11
Are connected to a power supply by respective protruding pieces 10a and 11a protruding from different sides, so that a predetermined voltage is applied.
【００２２】上記第１連通路１３は、図２および図３に
も示すように、上記中央部６ｂに対応する上側電極プレ
ート１０の一側位置の三日月状開口１０ｂで受圧室５ａ
に開口し、下側電極プレート１１の他側位置の三日月状
開口１１ｂで平衡室５ｂに開口するように形成されてい
る。一方、上記第２連通路１４は、上記一対の電極プレ
ート１０，１１の相対向面に形成された凹溝１０ｃ，１
１ｃが上記第１連通路１３の回りを囲むよう上記中央部
６ｂの周囲に平面視でＣ字状に配設されてなり、一端が
上記上側電極プレート１０の長穴１０ｄで受圧室５ａに
開口し、他端が上記下側電極プレート１１の長穴１１ｄ
で平衡室５ｂに開口するよう形成されている。As shown in FIGS. 2 and 3, the first communication passage 13 has a pressure receiving chamber 5a formed by a crescent-shaped opening 10b at one side of the upper electrode plate 10 corresponding to the central portion 6b.
The lower electrode plate 11 is formed so as to open to the equilibrium chamber 5b by a crescent-shaped opening 11b at another position. On the other hand, the second communication passage 14 is formed with a concave groove 10c, 1 formed on the opposing surface of the pair of electrode plates 10, 11.
1c is arranged in a C-shape in plan view around the central portion 6b so as to surround the first communication passage 13, and one end is opened to the pressure receiving chamber 5a by a long hole 10d of the upper electrode plate 10. And the other end is a long hole 11d of the lower electrode plate 11.
To form an opening in the equilibrium chamber 5b.
【００２３】上記第１連通路１３の上下間隔Ｈ1 、すな
わち、一対の電極プレート１０，１１の相対向面間隔
は、上記一対の電極プレート１０，１１への電圧印加に
より形成される電界によってその第１連通路１３を通る
電気粘性流体Ｅが増粘されてついにはその流動が停止さ
れる距離に設定されている。一方、上記第２連通路１４
を構成する両凹溝１０ｃ，１１ｃの溝底の上下間隔Ｈ2
は、上記一対の電極プレート１０，１１への最大印加電
圧に対して電界強度が１ｋｖ／ｍｍを超えない距離とな
るよう設定されている。具体的には、実用上の最大印加
電圧を５ｋｖとした場合、上記上下間隔Ｈ2 が５ｍｍ以
上となるように設定されて、両者間に発生する電界強度
が１ｋｖ／ｍｍ以下となるようにされている。つまり、
上記一対の電極プレート１０，１１に５ｋｖの電圧が印
加されても、第２連通路１４を通る電気粘性流体に増粘
効果を実質的に与えずに第２連通路１２を通した受圧室
５ａと平衡室５ｂとの間の電気粘性流体Ｅの流動状態が
変化しないような上記一対の電極プレート１０，１１の
間隔Ｈ2 に設定される。The vertical distance H1 of the first communication path 13, that is, the distance between the opposing surfaces of the pair of electrode plates 10, 11 is determined by the electric field formed by applying a voltage to the pair of electrode plates 10, 11. The distance is set such that the viscosity of the electrorheological fluid E passing through the single communication passage 13 is increased and finally the flow is stopped. On the other hand, the second communication path 14
The vertical spacing H2 between the groove bottoms of the two concave grooves 10c and 11c
Is set so that the electric field intensity does not exceed 1 kv / mm with respect to the maximum applied voltage to the pair of electrode plates 10 and 11. Specifically, when the practical maximum applied voltage is 5 kv, the vertical interval H2 is set so as to be 5 mm or more, and the electric field intensity generated between the two is set to 1 kv / mm or less. I have. That is,
Even if a voltage of 5 kv is applied to the pair of electrode plates 10 and 11, the pressure receiving chamber 5a passing through the second communication path 12 without substantially giving a thickening effect to the electrorheological fluid passing through the second communication path 14. The distance H2 between the pair of electrode plates 10, 11 is set so that the flow state of the electrorheological fluid E between the electrode plate and the equilibrium chamber 5b does not change.
【００２４】加えて、上記第１連通路１３の断面積およ
び長さをＡ1 ，Ｌ1 、第２連通路のそれをＡ2 ，Ｌ2 と
した場合、これらの値Ａ1 、Ｌ1 、Ａ2 、Ｌ2 が両連通
路１３，１４間で下記の（１）式を満足するようにそれ
ぞれ設定されて、互いに異なる所定の周波数域の各振動
に対して防振特性を発揮し得るようになっている。従 （Ａ2 ／Ｌ2 ）／（Ａ1 ／Ｌ1 ）＜１ ……（１） って、減衰の生じるピーク周波数などの変更制御を幅広
く行わしめるために上記（１）式の左辺の値が１よりも
十分に小さくなるように各値Ａ1 、Ｌ1 、Ａ2 、Ｌ2 を
設定するのが好ましい。In addition, when the cross-sectional area and length of the first communication path 13 are A1 and L1, and those of the second communication path are A2 and L2, these values A1, L1, A2 and L2 are the two communication paths. The passages 13 and 14 are set so as to satisfy the following expression (1), so that vibration isolation characteristics can be exhibited with respect to vibrations in predetermined different frequency ranges. Accordingly, (A2 / L2) / (A1 / L1) <1 (1) Therefore, in order to widely control the change of the peak frequency at which attenuation occurs, the value on the left side of the above equation (1) is larger than 1. It is preferable to set the values A1, L1, A2, and L2 so as to be sufficiently small.
【００２５】なお、このような電極プレート１０，１１
は金属素材の切削加工、鋳造、もしくは、導電性樹脂を
用いた成形などにより形成することができる。It should be noted that such electrode plates 10 and 11
Can be formed by cutting a metal material, casting, or molding using a conductive resin.
【００２６】そして、上記一対の電極プレート１０，１
１には、比較的低周波域（例えばシェイク振動の周波数
域）の入力振動に対して所定の電圧が印加されるように
なっており、これにより、受圧室５ａと平衡室５ｂとの
間での電気粘性流体Ｅの流動が上記の第２連通路１４を
のみ通して行われてこの第２連通路１４を介しての液柱
共振により上記低周波域の入力振動の減衰を行うように
なっている。また、比較的高周波域（例えばアイドル振
動の周波数域）の入力振動に対して上記の電圧印加が停
止されるようになっており、これにより、受圧室５ａと
平衡室５ｂとの間での電気粘性流体Ｅの流動が上記の第
１および第２連通路１３，１４の双方の大断面部分を通
して行われて上記第２連通路１４が目詰まり状態となる
ような高周波振動が入力しても受圧室５ａの内圧の急上
昇を防止して動ばね定数の低減化を図るようになってい
る。Then, the pair of electrode plates 10, 1
1, a predetermined voltage is applied to the input vibration in a relatively low frequency range (for example, the frequency range of the shake vibration), whereby the pressure between the pressure receiving chamber 5a and the equilibrium chamber 5b is increased. The flow of the electrorheological fluid E is performed only through the second communication passage 14, and the input vibration in the low frequency range is attenuated by the liquid column resonance through the second communication passage 14. ing. Further, the above-described voltage application is stopped with respect to the input vibration in a relatively high frequency range (for example, the frequency range of the idle vibration), whereby the electricity between the pressure receiving chamber 5a and the equilibrium chamber 5b is reduced. The viscous fluid E flows through the large cross-section of both the first and second communication passages 13 and 14 and receives pressure even if high-frequency vibration is input such that the second communication passage 14 is clogged. The dynamic spring constant is reduced by preventing a sudden rise in the internal pressure of the chamber 5a.
【００２７】つぎに、上記構成の第１実施例の作用・効
果を説明する。Next, the operation and effect of the first embodiment having the above configuration will be described.
【００２８】上記電気粘性流体封入式マウントは、上下
一側の連結ボルト１ｂが例えばエンジン側に、他側の各
連結ボルト８ｂが例えば車体側にそれぞれ連結される。In the electrorheological fluid-filled mount, the upper and lower connecting bolts 1b are connected to, for example, the engine side, and the other connecting bolts 8b are connected to, for example, the vehicle body.
【００２９】そして、一対の電極プレート１０，１１へ
の電圧印加により、第１連通路１３では電界が形成され
て第１連通路１３を通る電気粘性流体Ｅの粘度が高めら
れ、ついには第１連通路１３を通しての電気粘性流体Ｅ
の流動が実質的に行われない状態となる。これに対し
て、第２連通路１４では上記一対の電極プレート１０，
１１に電圧が印加されてもこの第２連通路１４を通る電
気粘性流体Ｅの粘性は実質的に変化せず、受圧室５ａと
平衡室５ｂとの間での電気粘性流体Ｅの流動がこの第２
連通路１４を通してのみ行われることになる。これによ
り、上記受圧室５ａと平衡室５ｂとの間の連通路が縮小
され液柱共振の生じる周波数域が低周波側に変化し、図
４に上述の（１）式の左辺の値が０．２３となる場合の
電圧印加時の防振特性を実線で示すように、減衰の生じ
るピーク周波数および動ばね定数の低値域が共に電圧印
加をしない場合（同図の破線参照）よりも低周波側に変
化する。そして、図４の場合、シェイク振動域である１
０〜２０Ｈｚの周波数域で高減衰、および、動ばね定数
の低動ばね化が図られる。Then, by applying a voltage to the pair of electrode plates 10 and 11, an electric field is formed in the first communication passage 13 and the viscosity of the electrorheological fluid E passing through the first communication passage 13 is increased. Electrorheological fluid E through communication passage 13
Flow is not substantially performed. On the other hand, in the second communication path 14, the pair of electrode plates 10,
Even when a voltage is applied to 11, the viscosity of the electrorheological fluid E passing through the second communication passage 14 does not substantially change, and the flow of the electrorheological fluid E between the pressure receiving chamber 5a and the equilibrium chamber 5b Second
It is performed only through the communication path 14. As a result, the communication path between the pressure receiving chamber 5a and the equilibrium chamber 5b is reduced, and the frequency range in which the liquid column resonance occurs changes to the low frequency side. In FIG. As shown by the solid line, the anti-vibration characteristics at the time of voltage application when the voltage is .23 are lower than those in the case where no voltage is applied to both the peak frequency at which attenuation occurs and the low value range of the dynamic spring constant (see the broken line in the same figure). Change to the side. Then, in the case of FIG.
High attenuation is achieved in the frequency range of 0 to 20 Hz, and the dynamic spring constant is reduced.
【００３０】一方、上記の電圧印加を停止すると、振動
入力により受圧室５ａと平衡室５ｂとの間での電気粘性
流体Ｅの流動が第１および第２連通路１３，１４の双方
で生じて連通路が拡大されるため、液柱共振の生じる周
波数域が高周波側に変化し、減衰の生じるピーク周波数
および動ばね定数の低値域が共に電圧印加をする場合
（図４の実線参照）よりも高周波側に変化する。そし
て、図４の場合、アイドル振動域である２０〜４０Ｈｚ
の周波数域で高減衰、および、動ばね定数の低動ばね化
が図られる。On the other hand, when the voltage application is stopped, the flow of the electrorheological fluid E between the pressure receiving chamber 5a and the equilibrium chamber 5b occurs in both the first and second communication passages 13 and 14 due to the vibration input. Since the communication path is enlarged, the frequency range in which the liquid column resonance occurs changes to the high frequency side, and the voltage is applied to both the peak frequency at which the attenuation occurs and the low value range of the dynamic spring constant (see the solid line in FIG. 4). It changes to the high frequency side. In the case of FIG. 4, the idle vibration range is 20 to 40 Hz.
In this frequency range, high attenuation and low dynamic spring of the dynamic spring constant are achieved.
【００３１】従って、振動発生源の側に取付けられた第
１支持体１から上下方向の低周波振動が入力した場合、
仕切体６を構成する一対の電極プレート１０，１１に所
定の電圧を印加することにより、第１連通路１３内の電
気粘性流体Ｅが増粘されて第１連通路１３内を電気粘性
流体Ｅが流動しないようにされる。このため、上記の振
動力入力により第１支持体１が下方に変位する場合、弾
性支承体３が下方に撓んで受圧室５ａが縮小され、内部
の電気粘性流体Ｅが第２連通路１４をのみ通して平衡室
５ｂの側に流動する。この液体Ｌの流動に伴い上記第２
連通路１４を介した液柱共振を有効に生じさせることが
でき、この液柱共振により上記低周波域の入力振動の高
減衰を図ることができる。Therefore, when low frequency vibration in the vertical direction is input from the first support 1 attached to the vibration source,
By applying a predetermined voltage to the pair of electrode plates 10 and 11 constituting the partition 6, the electrorheological fluid E in the first communication passage 13 is thickened, and the electrorheological fluid E flows in the first communication passage 13. Is prevented from flowing. For this reason, when the first support 1 is displaced downward due to the above-described vibration force input, the elastic bearing body 3 bends downward, the pressure receiving chamber 5a is reduced, and the internal electrorheological fluid E flows through the second communication passage 14. And flows toward the equilibrium chamber 5b. With the flow of the liquid L, the second
Liquid column resonance via the communication path 14 can be effectively generated, and the liquid column resonance can achieve high attenuation of the input vibration in the low frequency range.
【００３２】一方、上記第１支持体１から入力する振動
がより高周波側のものとなって上記第２連通路１４を通
した液体Ｌの流動が実質的に生じない目詰まり状態とな
った場合、弾性支承体３が下方に撓められることによっ
て受圧室５ａの液圧が上昇する。この際、上記の一対の
電極プレート１０，１１への電圧印加を停止することに
より、上記の第２連通路１４に加えて第１連通路１３の
双方の連通路１３，１４を介しての受圧室５ａと平衡室
５ｂとの間の電気粘性流体Ｅの流動が可能となる。この
ため、上記受圧室５ａの液圧変動に伴い平衡室５ｂとの
間での電気粘性流体Ｅの流動が十分に生じ、上記受圧室
５ａの内圧の上昇が防止されて高周波域の振動入力に対
して動ばね定数の低減化を図ることができる。On the other hand, when the vibration input from the first support 1 is on the higher frequency side and the liquid L through the second communication passage 14 is clogged in which the flow of the liquid L does not substantially occur. The fluid pressure in the pressure receiving chamber 5a rises due to the elastic bearing body 3 being bent downward. At this time, by stopping the voltage application to the pair of electrode plates 10, 11, the pressure receiving via the communication paths 13, 14 of the first communication path 13 in addition to the second communication path 14 is performed. The flow of the electrorheological fluid E between the chamber 5a and the equilibrium chamber 5b becomes possible. Therefore, the flow of the electrorheological fluid E between the pressure receiving chamber 5a and the equilibrium chamber 5b is sufficiently generated due to the fluctuation of the liquid pressure in the pressure receiving chamber 5a, and the internal pressure of the pressure receiving chamber 5a is prevented from rising. On the other hand, the dynamic spring constant can be reduced.
【００３３】このような、電圧印加のＯＮ・ＯＦＦ切換
制御により低周波域の入力振動に対する高減衰と、高周
波域の入力振動に対する低動ばね化とを図り得る２つの
連通路１３，１４が一対の電極プレート１０，１１を絶
縁部材１２を介して互いに重ね合わせるだけで仕切体６
の形成と同時に形成することができるため、従来の電気
粘性流体封入式マウントのごとく電気絶縁性樹脂からな
る一対のプレート部材の所定位置に電極を相対向して設
けて電極有りの部分と無しの部分とを区画して形成する
場合と比べ、構成を簡略化することができ、組付け作業
の容易化、および、部品点数の低減化を図ることができ
る。そして、一対の電極プレート１０，１１の間であり
ながら電圧印加しても電気粘性流体Ｅの流動状態を変化
させない第２連通路１４の形成を、上記各電極プレート
１０，１１に凹溝１０ｃ，１１ｃを形成して電界が電気
粘性流体に実質的に影響を及ぼさない上下間隔を隔てる
ことにより行っているため、従来の電気粘性流体封入式
マウントのごとく電極を設けない連通路を別に形成する
必要もなく、電圧印加により流動状態を変化させる連通
路１３と変化させない連通路１４との形成を容易に行う
ことができる。By such ON / OFF switching control of voltage application, two communication passages 13 and 14 which can achieve high attenuation for input vibration in a low frequency range and low dynamic spring for input vibration in a high frequency range are paired. The electrode plate 10, 11 is merely overlapped with each other with the insulating member 12 interposed therebetween.
Since the electrodes can be formed simultaneously with the formation of the electrodes, the electrodes are provided opposite to each other at predetermined positions of a pair of plate members made of an electrically insulating resin as in a conventional electrorheological fluid-filled mount, so that the electrodes with and without the electrodes are provided. The configuration can be simplified, the assembling work can be facilitated, and the number of parts can be reduced as compared with the case where the parts are partitioned and formed. The formation of the second communication path 14 that does not change the flow state of the electrorheological fluid E even when a voltage is applied between the pair of electrode plates 10 and 11 is performed by forming the concave grooves 10 c and 10 c in the electrode plates 10 and 11. 11c is formed so that the electric field does not substantially affect the electrorheological fluid, so as to separate the upper and lower spaces. Therefore, it is necessary to separately form a communication path without an electrode as in the conventional electrorheological fluid-filled mount. In addition, it is possible to easily form the communication path 13 that changes the flow state by applying a voltage and the communication path 14 that does not change the flow state.
【００３４】しかも、この際、第２連通路１４における
上記一対の電極プレート１０，１１の間隔を印加する最
大電圧との関係でこの第２連通路１４を通る電気粘性流
体に対し実質的に増粘作用を及ぼさない距離に設定して
いるため、低周波振動の入力に際して上記一対の電極プ
レート１０，１１に電圧を印加しても、上記第２連通路
１４を確実に電気粘性流体が流動可能な状態に保つこと
ができ、従来の電気粘性流体封入式マウントのごとくわ
ざわざ電極を設けない領域を形成する手間を必要とする
ことなく低周波振動の減衰を確実に図ることができる。
特に、第２連通路１４における一対の電極プレート１
０，１１の相対向面間隔として最大印加電圧に対し電界
強度が１ｋv ／ｍｍより小さくなる距離を設定している
ため、上記一対の電極プレート１０，１１に電圧を印加
しても第２連通路１４を通る電気粘性流体Ｅの粘度を増
加させることはなく、第２連通路１４を通した電気粘性
流体Ｅの流動を無印加状態の場合と同様に確保すること
ができる。Further, at this time, the electrorheological fluid passing through the second communication path 14 substantially increases in relation to the maximum voltage applied to the space between the pair of electrode plates 10 and 11 in the second communication path 14. Since the distance is set so as not to exert a viscous action, even when a voltage is applied to the pair of electrode plates 10 and 11 at the time of inputting low-frequency vibration, the electrorheological fluid can flow through the second communication path 14 reliably. And the low-frequency vibration can be reliably attenuated without requiring the trouble of forming a region in which no electrode is provided as in a conventional electrorheological fluid-filled mount.
In particular, the pair of electrode plates 1 in the second communication path 14
Since the distance at which the electric field strength is smaller than 1 kv / mm with respect to the maximum applied voltage is set as the distance between the opposing surfaces of 0 and 11, the second communication passage is formed even when the voltage is applied to the pair of electrode plates 10 and 11. The flow of the electrorheological fluid E through the second communication passage 14 can be ensured in the same manner as in the non-applied state without increasing the viscosity of the electrorheological fluid E passing through 14.
【００３５】また、第１連通路１３における断面積をそ
の長さで除した換算値に対する第２連通路１４における
同様換算値の比が１よりも小さくなるように、各連通路
１３，１４の断面積および長さの値を設定しているた
め、電圧印加、印加停止の切換制御により低周波側域と
高周波側域との２種類の周波数域の間で減衰のピーク周
波数、および、ばね定数の低値域を変更させることがで
きる。Further, the ratio of the similar conversion value in the second communication passage 14 to the conversion value obtained by dividing the sectional area in the first communication passage 13 by the length thereof is smaller than 1. Since the values of the cross-sectional area and the length are set, the peak frequency of the attenuation and the spring constant between the two frequency ranges of the low frequency side region and the high frequency side region are controlled by the switching control of voltage application and application stop. Can be changed.
【００３６】図５および図６は本発明の第２実施例に係
る電気粘性流体封入式マウント用仕切体としてプレス成
形部材により構成した仕切体１６を示している。この第
２実施例は第１実施例の仕切体６の構成のみ異なり、そ
の他の構成は第１実施例のものと同様である。このた
め、以下にこの第２実施例の仕切体１６の構成をのみ説
明し、他の構成については、同一部材には同一符号を付
して、その説明を省略する。FIGS. 5 and 6 show a partition member 16 formed of a press-formed member as a partition member for an electrorheological fluid-filled mount according to a second embodiment of the present invention. The second embodiment differs from the first embodiment only in the configuration of the partition 6 of the first embodiment, and the other configurations are the same as those of the first embodiment. For this reason, only the structure of the partition body 16 of the second embodiment will be described below, and the same reference numerals will be given to the same members for other structures, and the description thereof will be omitted.
【００３７】上記仕切体１６は、上記第１実施例の仕切
体６と同様に、互いに所定間隔を隔てて重ね合わされた
上下一対の電極プレート１７，１８と、この一対の電極
プレート１７，１８の相対向面間に介装されて両者１
７，１８間および固定ボルト９，９，…との間を絶縁す
るシリコンラバーなどからなる絶縁部材１９と、この絶
縁部材１９により上記相対向面間が区画されて形成され
た２つの連通路２０，２１とを備えている。そして、上
記一対の電極プレート１７，１８は、互いに異なる側に
突出した各突片１７ａ，１８ａにより電源と接続され
て、所定の電圧が印加されるようになっている。As in the case of the partition member 6 of the first embodiment, the partition member 16 includes a pair of upper and lower electrode plates 17 and 18 which are superposed at a predetermined interval from each other, and a pair of the upper and lower electrode plates 17 and 18. It is interposed between the opposing surfaces and both
An insulating member 19 made of silicon rubber or the like that insulates between the fixing members 7, 18 and between the fixing bolts 9, 9,..., And two communication passages 20 formed by dividing the opposing surfaces by the insulating member 19 , 21. The pair of electrode plates 17 and 18 are connected to a power supply by respective projecting pieces 17a and 18a projecting from different sides, so that a predetermined voltage is applied.
【００３８】上記一対の電極プレート１７，１８は共に
ハット形状にプレス成形された金属薄板により形成さ
れ、第１連通路２０が中央部に、第２連通路２１がその
第１連通路を囲むよう環状に形成されている。すなわ
ち、上記両電極プレート１７，１８は、共にほぼ同径の
円板状素材の中央部に互いに異なる直径の円形の凸部１
７ｂ，１８ｂを形成し、この両凸部１７ｂ，１８ｂを互
いに重ね合わせることにより、上記両凸部１７ｂ，１８
ｂの各端壁間に上記第１連通路２０が形成され、上記両
凸部１７ｂ，１８ｂの各周壁間に上記第２連通路２１が
形成されている。The pair of electrode plates 17 and 18 are both formed of a thin metal plate pressed into a hat shape, with the first communication passage 20 surrounding the center and the second communication passage 21 surrounding the first communication passage. It is formed in an annular shape. In other words, the two electrode plates 17 and 18 are formed at the center of a disk-shaped material having substantially the same diameter.
7b and 18b are formed, and the two convex portions 17b and 18b are overlapped with each other to form the two convex portions 17b and 18b.
The first communication path 20 is formed between the respective end walls of the convex section 17b, and the second communication path 21 is formed between the peripheral walls of the convex sections 17b and 18b.
【００３９】上記絶縁部材１９は、第１連通路２０と第
２連通路２１とを区画する内周側絶縁部材１９ａと、第
２連通路２１の外周側を区画しかつ固定ボルト９，９，
…の挿通孔を形成する外周側絶縁部材１９ｂとの２つか
らなる。The insulating member 19 includes an inner peripheral insulating member 19a for defining the first communication passage 20 and the second communication passage 21, and an outer peripheral side of the second communication passage 21 for fixing the bolts 9, 9, 9 and 9.
And the outer peripheral side insulating member 19b forming the insertion hole of.
【００４０】上記第１連通路２０は上側電極プレート１
７の一側位置の三日月状開口１７ｂで受圧室５ａ（図１
参照）に開口し、下側電極プレート１８の他側位置の三
日月状開口１８ｂで平衡室５ｂに開口するように形成さ
れている。一方、上記第２連通路１４は、一側の長穴１
７ｃで受圧室５ａに開口し、他端が上記下側電極プレー
ト１８の長穴１８ｃで平衡室５ｂに開口するよう形成さ
れている。The first communication passage 20 is provided on the upper electrode plate 1.
The pressure receiving chamber 5a (FIG. 1)
The lower electrode plate 18 is formed so as to open to the equilibrium chamber 5b at a crescent-shaped opening 18b at another position. On the other hand, the second communication passage 14 is provided on one side of the long hole 1.
An opening is formed in the pressure receiving chamber 5a at 7c, and the other end is opened to the balancing chamber 5b through the elongated hole 18c of the lower electrode plate 18.
【００４１】そして、上記第１連通路２０の上下間隔Ｈ
1 は上記各絶縁部材１９ａ，１９ｂの厚みにより定めら
れ、第２連通路２１の上下間隔Ｈ2 は上記各電極プレー
ト１７，１８の両凸部１７ａ，１８ａの深さにより定め
られる。そして、上記上下間隔Ｈ2 は、第１実施例と同
様に、電圧印加時に両電極プレート１７，１８間に形成
される電界強度が１ｋｖ／ｍｍを超えないようにその距
離が定められ、かつ、第１連通路２０の断面積Ａ1 ，長
さＬ1 、および、第２連通路２１の断面積Ａ2，長さＬ2
は、前述の（１）式を満足するよう各値が定められ
る。The vertical interval H of the first communication path 20
1 is determined by the thickness of each of the insulating members 19a and 19b, and the vertical interval H2 of the second communication passage 21 is determined by the depth of the two convex portions 17a and 18a of the electrode plates 17 and 18. The distance H2 is determined so that the electric field intensity formed between the two electrode plates 17 and 18 does not exceed 1 kv / mm when a voltage is applied, as in the first embodiment. The sectional area A1 and the length L1 of the first communication path 20, and the sectional area A2 and the length L2 of the second communication path 21
Are determined such that the above expression (1) is satisfied.
【００４２】そして、上記第２実施例の場合、第１実施
例と同様の作用、効果が得られる他、電圧印加により流
動状態を変化させる第１連通路と変化させない第２連通
路とを一対の電極プレート１７，１８で同時に形成する
に当たり、第２連通路２１で必要とされる所定の上下間
隔Ｈ2 をプレス成形による凸部１７ｂ，１８ｂにより確
保することができ、第１実施例のごとく金属板材の切削
加工により凹溝１０ｃ，１１ｃを形成する場合と比べ、
容易に形成することができる。In the case of the second embodiment, the same operation and effect as those of the first embodiment can be obtained. In addition, a first communication path whose flow state is changed by applying a voltage and a second communication path which is not changed are paired. When the electrode plates 17 and 18 are simultaneously formed, a predetermined vertical space H2 required in the second communication passage 21 can be secured by the convex portions 17b and 18b formed by press molding. Compared to the case where the concave grooves 10c and 11c are formed by cutting the plate material,
It can be easily formed.
【００４３】なお、本発明は上記第１および第２実施例
に限定されるものではなく、その他種々の変形例を包含
するものである。すなわち、上記第１実施例では、第２
連通路１４を一対の電極プレート１０，１１の双方に凹
溝１０ｃ，１１ｃを形成することにより形成している
が、これに限らず、例えば、上記一対の電極プレートの
内の一方にのみ凹溝を形成することにより第２連通路を
形成するようにしてもよい。The present invention is not limited to the first and second embodiments, but includes various other modifications. That is, in the first embodiment, the second
The communication path 14 is formed by forming the concave grooves 10c and 11c in both of the pair of electrode plates 10 and 11, but is not limited thereto. For example, the concave groove is formed only in one of the pair of electrode plates. May be formed to form the second communication path.
【００４４】また、上記実施例における第１および第２
連通路１３，１４、２０，２１の配置は、絶縁部材１
２，１９の形状を変更することにより自由に変更し得
る。Further, the first and second embodiments in the above embodiment are described.
The arrangement of the communication passages 13, 14, 20, 21 depends on the insulating member 1
It can be freely changed by changing the shape of 2, 19.
【００４５】[0045]
【発明の効果】以上説明したように、請求項１記載の発
明における電気粘性流体封入式マウントによれば、液室
を受圧室と平衡室とに仕切りかつ両者を互いに連通する
連通路を有する仕切体を、一対の電極プレートと、両電
極プレートの相対向面間に介装した絶縁部材とにより形
成し、この絶縁部材により上記一対の電極プレートの相
対向面間を第１連通路と第２連通路とに区画し、かつ、
第２連通路の相対向面間隔を電圧印加しても第２連通路
を通る電気粘性流体の粘度が実質的に変化しない距離に
設定しているため、電圧印加により電気粘性流体の流動
を制限する第１連通路と、電圧印加しても電気粘性流体
の流動状態が変化しない第２連通路とを有する仕切体
を、わざわざ電極部材を配置した領域と、電極部材を配
置しない領域とに別けて２つの連通路を仕切体内に形成
する従来の電気粘性流体封入式マウントに比べ、単純な
構成で実現することができ、組付けの容易化を図ること
ができる。従って、電圧印加の有無により減衰の生じる
ピーク周波数や、動ばね定数の低減域の周波数を変化さ
せることができる電気粘性流体封入式マウントを、容易
に構成することができ、その部品点数の低減化、コスト
の低減化を図ることができる。As described above, according to the electrorheological fluid-filled mount according to the first aspect of the present invention, the liquid chamber is partitioned into a pressure receiving chamber and an equilibrium chamber, and the partition has a communication passage communicating the two with each other. The body is formed by a pair of electrode plates and an insulating member interposed between the opposing surfaces of the two electrode plates. The insulating member allows the first communication passage and the second communication passage between the opposing surfaces of the pair of electrode plates. Divided into communication passages, and
Since the distance between the opposing surfaces of the second communication passage is set to a distance at which the viscosity of the electrorheological fluid passing through the second communication passage does not substantially change even when a voltage is applied, the flow of the electrorheological fluid is limited by applying the voltage. A partition body having a first communication path and a second communication path in which the flow state of the electrorheological fluid does not change even when a voltage is applied is divided into a region where the electrode member is disposed and a region where the electrode member is not disposed. As compared with a conventional electrorheological fluid-filled mount in which two communication passages are formed in the partition body, the mount can be realized with a simple configuration, and the assembly can be facilitated. Therefore, it is possible to easily configure an electrorheological fluid-filled mount that can change a peak frequency at which attenuation occurs depending on the presence or absence of a voltage and a frequency in a range where the dynamic spring constant is reduced, thereby reducing the number of parts. In addition, cost can be reduced.
【００４６】請求項２記載の発明によれば、上記請求項
１記載の発明による効果に加えて、第２連通路における
一対の電極プレートの相対向面間隔を印加電圧により形
成される電界強度が１ｋv ／ｍｍを超えない距離に設定
しているため、上記一対の電極プレートに電圧を印加し
ても第２連通路を通る電気粘性流体を実質的に増粘させ
ることはなく上記第２連通路を通した電気粘性流体の流
動を確保することができる。これにより、電圧印加の有
無により２つの周波数域の振動に対して防振特性を確実
に発揮させることができる。According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the electric field intensity formed by the applied voltage can be set so that the distance between the opposed surfaces of the pair of electrode plates in the second communication passage is increased. Since the distance is set so as not to exceed 1 kv / mm, even if a voltage is applied to the pair of electrode plates, the viscosity of the electrorheological fluid passing through the second communication path is not substantially increased, and the second communication path is not increased. The flow of the electrorheological fluid can be ensured. Thus, the anti-vibration characteristics can be reliably exhibited with respect to vibrations in two frequency ranges depending on whether or not a voltage is applied.
【００４７】請求項３記載の発明によれば、上記請求項
１記載の発明による効果に加えて、第１連通路と第２連
通路とのそれぞれの断面積および長さが所定の関係、す
なわち、第１連通路の断面積をその長さで除した値に対
する第２連通路の断面積をその長さで除した値の比が１
より小さくなるように関係付けられているため、一対の
電極プレートへの電圧印加の切換制御により確実に２つ
の周波数領域での防振特性を得ることができる。According to the third aspect of the present invention, in addition to the effect of the first aspect of the present invention, the respective sectional areas and lengths of the first communication passage and the second communication passage have a predetermined relationship, that is, The ratio of the sectional area of the second communication passage divided by its length to the sectional area of the first communication passage divided by its length is 1
Since the relations are set to be smaller, the anti-vibration characteristics in two frequency ranges can be reliably obtained by switching control of voltage application to the pair of electrode plates.
【００４８】また、請求項４記載の発明によれば、上記
請求項１記載の発明による効果に加えて、一対の電極プ
レートの相対向面に凹溝を形成するだけで所定の相対向
面間隔を有する第２連通路の形成を容易に行うことがで
き、一対の電極プレートを重ね合わせるだけで、電圧印
加により電気粘性流体の流動が制限される第１連通路と
その流動状態が変化しないに連通路との形成を容易かつ
確実に行うことができる。According to the fourth aspect of the present invention, in addition to the effect of the first aspect of the present invention, a predetermined distance between the opposing surfaces can be obtained only by forming a concave groove on the opposing surfaces of the pair of electrode plates. It is possible to easily form the second communication path having the first communication path in which the flow of the electrorheological fluid is limited by the application of the voltage and the flow state of the first communication path does not change only by overlapping the pair of electrode plates. The formation of the communication path can be easily and reliably performed.
【００４９】さらに、請求項５記載の発明によれば、上
記請求項１記載の発明による効果に加えて、一対の電極
プレートをプレス成形することにより所定の相対向面間
隔を有する第２連通路の形成を容易に行うことができ、
請求項４記載の発明と同様に、一対の電極プレートを重
ね合わせるだけで、電圧印加により電気粘性流体の流動
が制限される第１連通路とその流動状態が変化しないに
連通路との形成を容易かつ確実に行うことができる。According to a fifth aspect of the present invention, in addition to the effect of the first aspect, the second communication passage having a predetermined distance between the opposing surfaces is formed by press-forming a pair of electrode plates. Can be easily formed,
In the same manner as in the fourth aspect of the present invention, the formation of the first communication path in which the flow of the electrorheological fluid is restricted by the application of the voltage and the communication path without changing the flow state thereof are achieved only by overlapping the pair of electrode plates. It can be done easily and reliably.
【図１】本発明の第１実施例を示す縦断面図であり、仕
切体については図２のＡ−Ｂ−Ｃ−Ｄ−Ｅ−Ｆ−Ｇ線に
対応する縦断面図である。FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view corresponding to a line ABCDCEG of FIG.
【図２】図１の仕切体の拡大平面図である。FIG. 2 is an enlarged plan view of the partition body of FIG.
【図３】図２のＡ−Ａ′線における断面図である。FIG. 3 is a sectional view taken along line AA 'in FIG.
【図４】周波数と、動ばね定数およびロスファクターと
の関係図である。FIG. 4 is a diagram illustrating a relationship between a frequency, a dynamic spring constant, and a loss factor.
【図５】第２実施例における図２相当図である。FIG. 5 is a diagram corresponding to FIG. 2 in a second embodiment.
【図６】図５のＪ−Ｋ線における断面図である。FIG. 6 is a sectional view taken along line JK in FIG. 5;
１ 第１支持体 ２ 第２支持体 ３ 弾性支承体 ４ ダイヤフラム（弾性隔膜部
材） ５ 液室 ５ａ 受圧室 ５ｂ 平衡室 ６，１６ 仕切体 １０，１１，１７，１８ 電極プレート １２，１９ 絶縁部材 １３，２０ 第１連通路 １４，２１ 第２連通路 １０ｃ，１１ｃ 凹溝DESCRIPTION OF SYMBOLS 1 1st support body 2 2nd support body 3 elastic support body 4 diaphragm (elastic diaphragm member) 5 liquid chamber 5a pressure receiving chamber 5b balance chamber 6,16 partition body 10,11,17,18 electrode plate 12,19 insulating member 13 , 20 First communication path 14, 21 Second communication path 10c, 11c Groove
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) F16F 13/30 ──────────────────────────────────────────────────続 き Continuation of front page (58) Field surveyed (Int.Cl. 7 , DB name) F16F 13/30
Claims (5)
れた第１および第２の支持体と、これら第１および第２
の支持体を互いに連結する弾性支承体と、この弾性支承
体により上記振動入力方向の一側が画成され他側が弾性
隔膜部材により画成されて内部に電気粘性流体が封入さ
れた液室と、この液室を上記弾性支承体の側の受圧室と
上記弾性隔膜部材の側の平衡室とに仕切る仕切体と、こ
の仕切体に形成されて上記受圧室と平衡室とを互いに連
通する連通路とを備えた電気粘性流体封入式マウントに
おいて、 上記仕切体は、互いに所定間隔を隔てて重ね合わされて
相対向面間に上記連通路を形成する一対の電極プレート
と、 この一対の電極プレートの相対向面間を遮断して上記連
通路を第１連通路と第２連通路とに区画する絶縁部材と
からなり、 上記第１連通路における上記一対の電極プレートの相対
向面間隔が、その一対の電極プレートへの電圧印加によ
り上記第１連通路を通る電気粘性流体の粘度を変更し得
る電界強度を発揮する距離に設定される一方、上記第２
連通路における上記一対の電極プレートの相対向面間隔
が、その一対の電極プレートに電圧印加しても上記第２
連通路を通る電気粘性流体の粘度が実質的に変化しない
距離に設定されていることを特徴とする電気粘性流体封
入式マウント。1. A first and a second support member arranged at a predetermined distance in a vibration input direction, and the first and the second support members
A liquid chamber in which one side of the vibration input direction is defined by the elastic support and the other side is defined by an elastic diaphragm member and an electrorheological fluid is sealed therein, A partition for partitioning the liquid chamber into a pressure receiving chamber on the side of the elastic bearing member and a balancing chamber on the side of the elastic diaphragm member; and a communication passage formed in the partition and communicating the pressure receiving chamber and the balancing chamber with each other. An electrorheological fluid-filled mount having: An insulating member that blocks the facing surfaces to divide the communication path into a first communication path and a second communication path, wherein a distance between the pair of electrode plates in the first communication path is opposite to each other. To electrode plate While being set to a distance that exhibits an electric field strength capable of changing the viscosity of electro-rheological fluid through the first communication path by pressure, the second
The distance between the opposing surfaces of the pair of electrode plates in the communication passage is such that even if a voltage is applied to the pair of electrode plates,
An electrorheological fluid-filled mount, wherein the distance is set such that the viscosity of the electrorheological fluid passing through the communication passage does not substantially change.
は、一対の電極プレートへの最大印加電圧により形成さ
れる電界強度が１ｋv ／ｍｍを超えない距離に設定され
ている電気粘性流体封入式マウント。2. The distance between the opposing surfaces of the pair of electrode plates in the second communication passage according to claim 1, wherein the electric field intensity formed by the maximum voltage applied to the pair of electrode plates does not exceed 1 kv / mm. The set electrorheological fluid-filled mount.
連通路の断面積をＡ2、その長さをＬ2 とした場合、こ
れらＡ1 、Ａ2 、Ｌ1 、および、Ｌ2 が、 （Ａ2 ／Ｌ2 ）／（Ａ1 ／Ｌ1 ）＜１ を満足する値にそれぞれ設定されている電気粘性流体封
入式マウント。3. The method according to claim 1, wherein the first communication passage has a sectional area of A1 and a length of L1.
Assuming that the cross-sectional area of the communication passage is A2 and its length is L2, A1, A2, L1, and L2 are set to values satisfying (A2 / L2) / (A1 / L1) <1. Has an electrorheological fluid-filled mount.
る凹溝が形成されて所定の相対向面間隔に設定されてい
る電気粘性流体封入式マウント。4. The electrorheological fluid-filled mount according to claim 1, wherein the second communication passage is formed with a concave groove formed in the opposing surfaces of the pair of electrode plates and set at a predetermined interval between the opposing surfaces. .
板製の一対の電極プレートが互いに重ね合わされて所定
の相対向面間隔に設定されている電気粘性流体封入式マ
ウント。5. The electrorheological fluid according to claim 1, wherein the pair of electrode plates made of a thin metal plate, each of which is formed in a hat shape, are overlapped with each other, and the second communication passage is set at a predetermined interval between opposed surfaces. Enclosure mount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21367993A JP3350166B2 (en) | 1993-08-30 | 1993-08-30 | Electro-rheological fluid-filled mount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21367993A JP3350166B2 (en) | 1993-08-30 | 1993-08-30 | Electro-rheological fluid-filled mount |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0763238A JPH0763238A (en) | 1995-03-07 |
| JP3350166B2 true JP3350166B2 (en) | 2002-11-25 |
Family
ID=16643184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21367993A Expired - Fee Related JP3350166B2 (en) | 1993-08-30 | 1993-08-30 | Electro-rheological fluid-filled mount |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3350166B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19620971C2 (en) * | 1996-05-24 | 1999-02-25 | Freudenberg Carl Fa | Hydro bearing |
| JP3052853B2 (en) * | 1996-10-04 | 2000-06-19 | トヨタ自動車株式会社 | Power unit suspension |
-
1993
- 1993-08-30 JP JP21367993A patent/JP3350166B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0763238A (en) | 1995-03-07 |
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