JPH03103635A - Liquid sealing type vibration proof device - Google Patents

Liquid sealing type vibration proof device

Info

Publication number
JPH03103635A
JPH03103635A JP24150789A JP24150789A JPH03103635A JP H03103635 A JPH03103635 A JP H03103635A JP 24150789 A JP24150789 A JP 24150789A JP 24150789 A JP24150789 A JP 24150789A JP H03103635 A JPH03103635 A JP H03103635A
Authority
JP
Japan
Prior art keywords
rubber
liquid chamber
liquid
movable wall
film
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.)
Pending
Application number
JP24150789A
Other languages
Japanese (ja)
Inventor
Hitoshi Tajima
田島 斉
Shigeki Takeo
茂樹 竹尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Gosei Co Ltd
Original Assignee
Toyoda Gosei Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyoda Gosei Co Ltd filed Critical Toyoda Gosei Co Ltd
Priority to JP24150789A priority Critical patent/JPH03103635A/en
Publication of JPH03103635A publication Critical patent/JPH03103635A/en
Pending legal-status Critical Current

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  • Combined Devices Of Dampers And Springs (AREA)

Abstract

PURPOSE:To attenuate vibration in a wide frequency area by sealing electroviscous liquid which increases in viscosity according to the application of electric field in two liquid chambers, and providing a movable wall which moves based on pressure difference between both sides of an auxiliary liquid chamber and electrodes. CONSTITUTION:A vibration proof rubber body 1 is composed of a cup-like thick rubber opened downwardly, onto whose flat top an engine is mounted end fixed. An opening of the rubber body 1 is closed by a partition wall 2, while a rubber film 4 is arranged below the partition well 2. A vessel-like bottom plate 5, which is provided below the rubber film 4, is calkingly connected to an side plate 6 extending from the rubber body 1 under the state that the edge of the opening of the plate 5 is abutted against the outer peripheral edge of the rubber film 4. Electroviscous fluid is sealed in a sealed space formed by the rubber body 1 and the rubber film 4. A main liquid chamber A and a sub-liquid chamber B are formed respectively above and below the partition wall 2. A rubber movable wall 3 is arranged across an auxiliary liquidchamber C, while film electrodes are formed on both sides of a thin film of the movable wall 3 and inner faces of upper and lower plates opposing thereto.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は液封入防振装置に関し、特に大振幅振動の減衰
と小振幅振動の吸収を共に良好になし得る液封入防振装
置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid-filled vibration isolator, and more particularly to a liquid-filled vibration isolator that can effectively damp both large-amplitude vibrations and absorb small-amplitude vibrations.

[従来の技術] 液封入防振装置は封入液の作用により特に低周波の大振
幅振動を効果的に減衰せしめることができるもので、車
両のエンジンマウント等への適用が図られている。かか
る防振装置では防振ゴム体の低動バネ化が可能であるた
め、高周波の小振幅振動の吸収も比較的良好になされる
が、さらに高周波振動の吸収を効果的になす目的の下、
種々の工夫がなされている。
[Prior Art] Liquid-filled vibration isolators are capable of effectively attenuating particularly low-frequency, large-amplitude vibrations through the action of a sealed liquid, and are being applied to vehicle engine mounts and the like. In such a vibration isolator, since it is possible to make the vibration isolator rubber body have a low dynamic spring, it is possible to absorb small high frequency vibrations relatively well.
Various efforts have been made.

その一例を第5図で説明すると、振動体を支持する厚肉
の防振ゴム体l内には主液室Aが形成され、該主液室A
と仕切壁2で区画されて、薄肉のゴム膜4を室壁とする
副液室Bが形或されている。
An example of this will be explained with reference to FIG.
A sub-liquid chamber B is formed which is divided by a partition wall 2 and has a thin rubber membrane 4 as a chamber wall.

上記仕切壁2はリング状の枠体23と該枠体23の開口
内に設けたゴム可動壁3より構成され、上記両液室A,
Bは枠体23の外周に形或した絞り流路Fにより連通し
ている。上記可動壁3は外周縁が枠体23開口の内周壁
に決着され、常に大気圧にある副液室Bに対して上記主
液室Aの内圧が変化すると、これに応じて特に可動壁3
の薄肉中心部が一定範囲で移動して内圧変化を小さく抑
える。
The partition wall 2 is composed of a ring-shaped frame body 23 and a rubber movable wall 3 provided in the opening of the frame body 23.
B communicates with each other through a throttle channel F formed on the outer periphery of the frame body 23. The outer peripheral edge of the movable wall 3 is fixed to the inner peripheral wall of the opening of the frame body 23, and when the internal pressure of the main liquid chamber A changes with respect to the sub-liquid chamber B which is always at atmospheric pressure, the movable wall 3
The thin center part of the body moves within a certain range to keep internal pressure changes small.

かかる構造において、大振幅振動入力時には、防振ゴム
体1の変形により主液室Aの内圧は大きく変化し、可動
壁3の移動によっては上記内圧変化を抑制できず、密封
液が絞り流路Fを経て副液室Bへ流通して大きな振動減
衰力を生じる。
In this structure, when a large amplitude vibration is input, the internal pressure of the main liquid chamber A changes greatly due to the deformation of the vibration isolating rubber body 1, and the above internal pressure change cannot be suppressed by the movement of the movable wall 3, and the sealing liquid flows into the throttle channel. It flows through F to the sub-liquid chamber B, producing a large vibration damping force.

小振幅振動入力時にも主液室Aの内圧は変化するが、こ
の内圧変化は可動壁3の移動により極めて小さく抑えら
れ、この結果、良好な振動吸収がなされる。
Although the internal pressure of the main liquid chamber A changes even when small-amplitude vibrations are input, this internal pressure change is kept extremely small by the movement of the movable wall 3, and as a result, good vibration absorption is achieved.

[発明が解決しようとする課M] ところで、上記従来の液封入防振装置において、可動壁
3は一定範囲ながら大振幅振動入力時にも移動するから
、この分、主液室A内の内圧増大は減殺され、十分に高
い減衰特性が得られない場合がある。そして、この問題
は、比較的振幅の大きい高周波振動を吸収するために上
記可動壁3の移動範囲を大きくした場合に甚だしい。
[Problem M to be solved by the invention] By the way, in the conventional liquid-filled vibration isolator described above, the movable wall 3 moves within a certain range even when a large amplitude vibration is input, so the internal pressure in the main liquid chamber A increases accordingly. is attenuated, and a sufficiently high attenuation characteristic may not be obtained. This problem becomes serious when the movable range of the movable wall 3 is increased in order to absorb high-frequency vibrations with relatively large amplitudes.

本発明はかかる課題を解決するもので、可動壁を設けた
液封入防振装置において、低周波大振幅振動に対する高
減衰特性と高周波小振幅振動に対する振動吸収特性をい
ずれも良好に発揮する液封入防振装置を提供することを
目的とする。
The present invention solves this problem, and is a liquid-filled vibration isolator equipped with a movable wall, in which a liquid-filled vibration damping device that satisfactorily exhibits both high damping characteristics against low-frequency, large-amplitude vibrations and vibration-absorbing characteristics against high-frequency, small-amplitude vibrations. The purpose is to provide a vibration isolator.

[課題を解決するための手段] 本発明の構成を説明すると、液封入防振装置は、振動体
に連結された防振ゴム体1(第l図)内に絞り流路Fに
より連通し仕切壁2により区画された一対の液室A,B
を形或して、これら液室A、B内に電界の作用により粘
度が増大する電気粘性液を封入し、上記仕切壁2内に上
記各液室A, Bに連通ずる補助液室Cを設けるととも
に、該補助液室C内に、これを上記各液室A.B側に区
画し両側の圧力差に応じて移動する可動壁3を設け、か
つ、上記補助液室C内に電界を形成する電極41、42
(第2図〉を設けたものである。
[Means for Solving the Problems] To explain the structure of the present invention, a liquid-filled vibration isolator includes a partition that is connected to a vibration isolating rubber body 1 (FIG. 1) connected to a vibrating body through a throttle channel F. A pair of liquid chambers A and B separated by wall 2
An electroviscous liquid whose viscosity increases due to the action of an electric field is sealed in these liquid chambers A and B, and an auxiliary liquid chamber C is formed in the partition wall 2 and communicates with each of the liquid chambers A and B. The auxiliary liquid chamber C includes the liquid chamber A. Electrodes 41 and 42 are provided with a movable wall 3 that is partitioned on the B side and move according to the pressure difference between both sides, and that form an electric field in the auxiliary liquid chamber C.
(Fig. 2) is provided.

[作用] 上記構成の液封入防振装置において、大振幅振動入力時
には電極41、42に通電して補助液室C内に電界を形
或する。この電界により補助液室C内の、可動壁3の両
側にある電気粘性液はその粘度が急増し、可動壁3の移
動が困難となる。しかして、振動入力により大きく変形
する上記両液室A,Bの内圧変化により両側に圧力差を
生じても可動壁3は殆ど移動せず、上記内圧の増大が減
殺されることはないから、絞り流路Fを経て上記両液室
A,B間に密封液が効率的に流通して高減衰作用をなす
[Operation] In the liquid-filled vibration isolator having the above configuration, when a large amplitude vibration is input, electricity is applied to the electrodes 41 and 42 to form an electric field in the auxiliary liquid chamber C. Due to this electric field, the viscosity of the electrorheological liquid on both sides of the movable wall 3 in the auxiliary liquid chamber C increases rapidly, making it difficult for the movable wall 3 to move. Therefore, even if a pressure difference is generated on both sides due to a change in the internal pressure of the liquid chambers A and B, which are greatly deformed by vibration input, the movable wall 3 hardly moves, and the increase in the internal pressure is not reduced. The sealing liquid efficiently flows between the two liquid chambers A and B through the throttle channel F, resulting in a high damping effect.

また、上記電極41、42への印加電圧を調整すること
により、高減衰を生じる周波数を変更することができ、
広い周波数範囲の振動減衰が可能である。
Furthermore, by adjusting the voltage applied to the electrodes 41 and 42, the frequency at which high attenuation occurs can be changed.
Vibration damping over a wide frequency range is possible.

小振幅振動入力時には上記電極41、42への通電を停
止する。補助液室C内の電界は解消され、電気粘性液の
粘度が低下して可動壁3は自由に移動可能となる。しか
して、振動入力により上記両液室A,Hの内圧が多少変
化しても、この内圧変化は上記可動壁3の移動によりご
く小さく抑えられ、良好な振動吸収作用がなされる。
When a small amplitude vibration is input, the power supply to the electrodes 41 and 42 is stopped. The electric field in the auxiliary liquid chamber C is eliminated, the viscosity of the electrorheological liquid is reduced, and the movable wall 3 becomes freely movable. Therefore, even if the internal pressures of the liquid chambers A and H change somewhat due to vibration input, this internal pressure change is suppressed to a very small level by the movement of the movable wall 3, and a good vibration absorption effect is achieved.

[実施例] 、第1図において、防振ゴム休1は下方へ開放する椀形
の厚肉ゴムよりなり、その平らな頂面には振動体たるエ
ンジンが載置固定される。防振ゴム体1の開口は詳細を
後述する仕切壁2により閉鎖され、仕切壁2の下方には
ゴム膜4が配設されてその外周縁は上記仕切壁2の外周
下面に密接している。
[Embodiment] In FIG. 1, a vibration isolating rubber rest 1 is made of a bowl-shaped thick rubber that opens downward, and an engine as a vibrating body is mounted and fixed on its flat top surface. The opening of the vibration isolating rubber body 1 is closed by a partition wall 2, the details of which will be described later. A rubber membrane 4 is disposed below the partition wall 2, and its outer periphery is in close contact with the lower surface of the outer periphery of the partition wall 2. .

上記ゴム膜4の下方には容器状の底板5が配設され、そ
の開口縁をゴム膜4の外周縁に当接せしめた状態で、防
振ゴム体1より延びる側板6にかしめ連結されている。
A container-shaped bottom plate 5 is disposed below the rubber membrane 4, and is caulked and connected to a side plate 6 extending from the anti-vibration rubber body 1, with its opening edge in contact with the outer peripheral edge of the rubber membrane 4. There is.

そして、上記防振ゴム体lとゴム膜4により形成された
密閉空間内に電気粘性液が封入され、仕切壁2の上方に
主液室Aが、仕切壁2の下方には副液室Bがそれぞれ形
成されている。
An electrorheological liquid is sealed in the sealed space formed by the vibration-proof rubber body 1 and the rubber film 4, and a main liquid chamber A is located above the partition wall 2, and a sub-liquid chamber B is located below the partition wall 2. are formed respectively.

上記仕切壁2の詳細を第2図で説明する。仕切壁2は円
形の上側板21(第3図〉と下側板22を外周部で重ね
て構戒され、これら上側板21と下側板22の内周部は
一定間隔離れて対向して補助液室Cを形成している。こ
の補助液室Cは上記上側板21と下側板22に設けた複
数の丸孔211、221によりそれぞれ主液室Aと副液
室Bに連通している。
Details of the partition wall 2 will be explained with reference to FIG. 2. The partition wall 2 is constructed by stacking a circular upper plate 21 (Fig. 3) and a lower plate 22 at the outer periphery, and the inner peripheries of the upper plate 21 and the lower plate 22 face each other at a certain distance from each other. A chamber C is formed. This auxiliary liquid chamber C communicates with the main liquid chamber A and the auxiliary liquid chamber B through a plurality of round holes 211 and 221 provided in the upper side plate 21 and the lower side plate 22, respectively.

上記補助液室C内にはこれを横切ってゴムの可動壁3が
配設され、該可動壁3は外周部を除く大部分を薄肉とし
て自由変形自在となし、上記外周部側面の全周より突出
するT字断面の取付リブ3lを上記上測板21と下側板
22に挟持せしめて保持されている。しかして、上記可
動壁3で区画された補助液室Cの上半は主液室Aに通じ
、下半は副液室Bに通じている。
A movable rubber wall 3 is disposed in the auxiliary liquid chamber C across the auxiliary liquid chamber C, and the movable wall 3 is thin in most parts except for the outer periphery and is freely deformable. A protruding mounting rib 3l having a T-shaped cross section is held between the upper measuring plate 21 and the lower plate 22. The upper half of the auxiliary liquid chamber C divided by the movable wall 3 communicates with the main liquid chamber A, and the lower half communicates with the auxiliary liquid chamber B.

上記可動壁3の薄肉部両面とこれに対向する上側板21
および下側板22の各内面には、それぞれ膜状電極4■
、42が形戒され、電極41はリード線43によりアー
スされ、電極42はリード線44により装置外の電源に
それぞれ接続されている。
Both sides of the thin wall portion of the movable wall 3 and the upper plate 21 opposite thereto
And on each inner surface of the lower plate 22, a membrane electrode 4 is provided.
, 42 are connected to each other, the electrode 41 is grounded by a lead wire 43, and the electrode 42 is connected to a power source outside the device by a lead wire 44, respectively.

なお、上記上側板2lの外周部四面には全周に矩形の凹
講23が形成してあり、仕切壁2を所定位置に設置した
状態で、凹溝23の開放部は側板6により閉鎖されて(
第■図〉、適当位置で主液室Aと副液室Bに通じる絞り
流路Fとなる。
Incidentally, a rectangular groove 23 is formed all around the four outer peripheral surfaces of the upper plate 2l, and the open part of the groove 23 is closed by the side plate 6 when the partition wall 2 is installed at a predetermined position. hand(
Fig. 2) At an appropriate position, a throttle flow path F is formed that communicates with the main liquid chamber A and the sub-liquid chamber B.

上記構造の液封入防振装置の作動を以下に説明する。The operation of the liquid-filled vibration isolator having the above structure will be explained below.

エンジンシェイクの如き低周波の大振幅振動が入力する
場合には、電極41、42に通電して補助液室C内に電
界を形成する。この電界により補助液室C内の、可動壁
3と上側板2lないし下側板22との間にある電気粘性
液はその粘度が急増し、可動壁3は移動が困難となる。
When low-frequency, large-amplitude vibrations such as engine shake are input, the electrodes 41 and 42 are energized to form an electric field within the auxiliary fluid chamber C. Due to this electric field, the viscosity of the electrorheological liquid between the movable wall 3 and the upper plate 2l or the lower plate 22 in the auxiliary liquid chamber C increases rapidly, making it difficult for the movable wall 3 to move.

しかして、振動入力に伴い内圧が増大する主液室Aと大
気圧の副液室Bとの間に圧力差を生じ、この圧力差によ
る作用力が可動壁3に働くが、可動壁3は殆ど移動しな
い。
As a result, a pressure difference is created between the main liquid chamber A whose internal pressure increases with the vibration input and the sub-liquid chamber B whose internal pressure is at atmospheric pressure, and an acting force due to this pressure difference acts on the movable wall 3. It hardly moves.

かくして、上記主液室Aの内圧の増大が減殺されること
はなく、絞り流路Fを経て上記両液室A、B間に密封液
が効率的に流通して高減衰作用をなす。これを第4図の
線Xで示し、10Hz付近で防振装置は十分大きな減衰
係数のピーク値を有する。ちなみに、図中線X一は、従
来装置の特性を示し、可動壁の移動により減衰作用が減
殺されていることが知られる。
In this way, the increase in the internal pressure of the main liquid chamber A is not reduced, and the sealing liquid efficiently flows between the two liquid chambers A and B through the throttle channel F, resulting in a high damping effect. This is shown by line X in FIG. 4, and the vibration isolator has a sufficiently large peak value of the damping coefficient near 10 Hz. Incidentally, the line X1 in the figure shows the characteristics of the conventional device, and it is known that the damping effect is reduced by the movement of the movable wall.

なお、上記電極4l、42への印加電圧を調整すること
により、減衰係数がピーク値を示す周波数を変更する(
第4図の線Xより線y)ことができ、広い周波数範囲の
振動入力を低減することができる。
Note that by adjusting the voltage applied to the electrodes 4l and 42, the frequency at which the attenuation coefficient shows the peak value can be changed (
From line X to line y in FIG. 4), it is possible to reduce vibration input over a wide frequency range.

こもり音振動の如き高周波の小振幅振動入力時には、上
記電極41、42への通電を停止する。
When high-frequency, small-amplitude vibrations such as muffled sound vibrations are input, the power supply to the electrodes 41 and 42 is stopped.

これにより、補助液室C内の電界は解消され、電気粘性
液の粘度が低下して可動壁3が自由に移動可能となる。
As a result, the electric field within the auxiliary liquid chamber C is eliminated, the viscosity of the electrorheological liquid is reduced, and the movable wall 3 becomes freely movable.

しかして、振動入力により上記主液室Aの内圧がある程
度変化しても、この内圧変化は上記可動壁3の移動によ
りごく小さく抑えられ、良好な振動吸収作用がなされる
Therefore, even if the internal pressure of the main liquid chamber A changes to some extent due to vibration input, this internal pressure change is kept to a very small level by the movement of the movable wall 3, and a good vibration absorption effect is achieved.

[発明の効果] 本発明の液封入防振装置によれば、−可動壁周囲に電気
粘性液を満たし、これへの電界印加を制御することによ
り高減衰特性と良好な振動吸収特性を併せて実現し、ま
た、広い周波数域の振動減衰を可能としたものである。
[Effects of the Invention] According to the liquid-filled vibration isolator of the present invention, - high damping characteristics and good vibration absorption characteristics can be achieved by filling the periphery of the movable wall with an electroviscous liquid and controlling the application of an electric field thereto. This has enabled vibration damping over a wide frequency range.

【図面の簡単な説明】[Brief explanation of drawings]

第l図ないし第4図は本発明の一実施例を示し、第1図
は装置の全体断面図、第2図は仕切壁の断面図、第3図
はその平面図、第4図は装置の減衰特性を示す図、第5
図は従来装置の全体断面図である。 ■・・・防振ゴム体 2・・・仕切壁 21・・・上側板 22・・・下側板 211、221・・・円孔 3・・・可動壁 41、42・・・電極 45・・・電源 A・・・主液室(液室〉 B・・・副液室(液室) C・・・袖助液室 F・・・絞り流路 周 杏 数 第3図
Figures 1 to 4 show an embodiment of the present invention, in which Figure 1 is an overall sectional view of the device, Figure 2 is a sectional view of a partition wall, Figure 3 is a plan view thereof, and Figure 4 is a sectional view of the device. Figure 5 shows the attenuation characteristics of
The figure is an overall sectional view of a conventional device. ■... Vibration-proof rubber body 2... Partition wall 21... Upper plate 22... Lower plate 211, 221... Circular hole 3... Movable wall 41, 42... Electrode 45...・Power supply A...Main liquid chamber (liquid chamber) B...Sub-liquid chamber (liquid chamber) C...Sleeve auxiliary liquid chamber F...Restricted channel circumference Figure 3

Claims (1)

【特許請求の範囲】[Claims] 振動体に連結された防振ゴム体内に絞り流路により連通
し仕切壁により区画された一対の液室を形成して、これ
ら液室内に電界の作用により粘度が増大する電気粘性液
を封入し、上記仕切壁内に上記各液室に連通する補助液
室を設けるとともに、該補助液室内に、これを上記各液
室側に区画し両側の圧力差に応じて移動する可動壁を設
け、かつ、上記補助液室内に電界を形成する電極を設け
たことを特徴とする液封入防振装置。
A pair of liquid chambers are formed in a vibration isolating rubber body connected to a vibrating body and are connected by a throttle channel and separated by a partition wall, and an electrorheological liquid whose viscosity increases due to the action of an electric field is sealed in these liquid chambers. , an auxiliary liquid chamber communicating with each of the liquid chambers is provided within the partition wall, and a movable wall is provided within the auxiliary liquid chamber that partitions the auxiliary liquid chamber to the side of each of the liquid chambers and moves according to the pressure difference between the two sides, A liquid-filled vibration isolator characterized in that an electrode for forming an electric field is provided in the auxiliary liquid chamber.
JP24150789A 1989-09-18 1989-09-18 Liquid sealing type vibration proof device Pending JPH03103635A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24150789A JPH03103635A (en) 1989-09-18 1989-09-18 Liquid sealing type vibration proof device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24150789A JPH03103635A (en) 1989-09-18 1989-09-18 Liquid sealing type vibration proof device

Publications (1)

Publication Number Publication Date
JPH03103635A true JPH03103635A (en) 1991-04-30

Family

ID=17075359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24150789A Pending JPH03103635A (en) 1989-09-18 1989-09-18 Liquid sealing type vibration proof device

Country Status (1)

Country Link
JP (1) JPH03103635A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003004088A (en) * 2001-06-23 2003-01-08 Yamashita Rubber Co Ltd Liquid sealed vibration isolator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003004088A (en) * 2001-06-23 2003-01-08 Yamashita Rubber Co Ltd Liquid sealed vibration isolator
JP4716615B2 (en) * 2001-06-23 2011-07-06 山下ゴム株式会社 Liquid seal vibration isolator

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