JPS62118132A - Vibration isolator including liquid - Google Patents
Vibration isolator including liquidInfo
- Publication number
- JPS62118132A JPS62118132A JP25680285A JP25680285A JPS62118132A JP S62118132 A JPS62118132 A JP S62118132A JP 25680285 A JP25680285 A JP 25680285A JP 25680285 A JP25680285 A JP 25680285A JP S62118132 A JPS62118132 A JP S62118132A
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- elastic body
- cylindrical casing
- vibration isolator
- liquid chambers
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
- F16F13/14—Units of the bushing type, i.e. loaded predominantly radially
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Combined Devices Of Dampers And Springs (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、弾性ブツシュ、エンジンマウント、キャブ
マウントなどとして適用されて低周波大振幅振動を有効
に減衰できる他、高周波小振幅振動を十分に吸収するこ
とができる耐久性にすぐれた液入り防振装置に関するも
のである。[Detailed Description of the Invention] (Industrial Application Field) This invention can be applied to elastic bushings, engine mounts, cab mounts, etc., and can effectively damp low-frequency, large-amplitude vibrations, as well as sufficiently damp high-frequency, small-amplitude vibrations. This invention relates to a liquid-filled vibration isolator with excellent durability that can absorb vibrations.
（従来の技術）
従来のこの種の液入り防振装置としては、たとえば、同
心配置した高剛性の内筒および外筒を、ゴム弾性体によ
って相互連結し、そしてこれらの内外筒間で、ゴム弾性
体の軸線方向中央位置に、直径方向に対抗させて区画さ
れ、かつ、内部に非圧縮性の液体を封入された二個の液
室を設け、これらの両液室を一本もしくは複数本の絞り
通路によって連通させたものがある。(Prior Art) In a conventional liquid-filled vibration isolator of this type, for example, a high-rigidity inner cylinder and an outer cylinder arranged concentrically are connected to each other by a rubber elastic body, and a rubber Two liquid chambers are provided at the center of the elastic body in the axial direction, partitioned diametrically opposed to each other, and each of which is filled with an incompressible liquid, and one or more liquid chambers are provided. There are some that are communicated by a constricted passage.
かかる防振装置は、そこへ伝達されるとくに低周波大振
幅振動（たとえば５０）１ｚ未満で±１１１前後の振動
）に対しては、一方の液室内の液体が、絞り通路を通っ
て他方の液室へ流入するに際してその絞り通路が液体に
及ぼす流動抵抗によって、液体の運動エネルギーを熱エ
ネルギーに変換することにて振動の有効なる減衰をもた
らすことができる。In such a vibration isolator, the liquid in one liquid chamber passes through the constriction passage and flows into the other liquid chamber, especially in response to low frequency, large amplitude vibrations (for example, vibrations of about ±111 at less than 50) 1z) that are transmitted thereto. The flow resistance exerted by the constricted passage on the liquid as it enters the liquid chamber can provide effective damping of vibrations by converting the kinetic energy of the liquid into thermal energy.
ところが、このような従来の防振装置にあっては、両液
室の連通をもたらす絞り通路の断面積および長さを、低
周波帯域の振動の十分なる減衰をもたらし得るよう選択
した場合には、高周波帯域中の比較的低い周波数の振動
によって、絞り通路内の液体の慣性力、摩擦力などに起
因する絞り通路の閉塞状態が惹起され、この結果として
、動的ばね定数の急激なる増加がもたらされることから
、それ以上の高周波振動に対しては、振動の絶縁および
減衰をほとんどもたらし得なくなるという問題があった
。However, in such a conventional vibration isolator, if the cross-sectional area and length of the throttle passage that brings the two liquid chambers into communication are selected to provide sufficient attenuation of vibrations in the low frequency band, , relatively low frequency vibrations in the high frequency band cause a blockage state of the throttle passage due to inertia force of the liquid in the throttle passage, frictional force, etc., and as a result, a rapid increase in the dynamic spring constant occurs. Therefore, there was a problem in that vibration isolation and damping could hardly be achieved against higher frequency vibrations.
これがため、低周波大振幅振動の減衰のみならず、高周
波小振幅振動の吸収をも可能ならしめるものとして特開
昭６０−１７９５４２号公報に開示されているようなブ
ツシュタイプの液入り防振装置が提案されている。For this reason, a bush type liquid-filled vibration isolator as disclosed in JP-A-60-179542 is capable of not only damping low-frequency, large-amplitude vibrations, but also absorbing high-frequency, small-amplitude vibrations. A device has been proposed.
この防振装置は、内筒の周りに固定した金属製のブロッ
ク体に、二個の液室内へ突出するそれぞれのストッパを
、直径方向へ対抗させて設けるとともに、内筒を挟んで
これらのストッパとは直角方向へ突出する突出部を設け
、そしてこれらの突出部を、それらを取り囲むゴムスリ
ーブに加硫接着させる一方、各突出部に設けた連通孔内
に、可動部材として機能するゴム製可動体を配設するこ
とにより構成されている。This vibration isolator is equipped with two stoppers that protrude into the liquid chamber and are opposed to each other in the diametrical direction on a metal block fixed around the inner cylinder. These protrusions are vulcanized and bonded to a rubber sleeve surrounding them, while a rubber movable member that functions as a movable member is placed in a communicating hole provided in each protrusion. It is constructed by arranging the body.
このような防振装置は、そこへの高周波小振幅振動の伝
達に際し、それぞれの液室内圧の差圧に基づいてゴム製
可動体を突出部内で変位させることにより、その振動を
十分有効に吸収することができる。Such a vibration isolator effectively absorbs high-frequency, small-amplitude vibrations by displacing the rubber movable body within the protrusion based on the pressure difference between the respective liquid chambers when high-frequency, small-amplitude vibrations are transmitted thereto. can do.
（発明が解決しようとする問題点）
ところが、かかる提案技術にあっては、とくに、ゴム製
可動体を囲繞するブロック体の突出部を、それを取り囲
むゴムスリーブに加硫接着させていることから、防振装
置への繰返し荷重の作用によって、比較的早期にその加
硫接着部に応力が集中して亀裂が生じ、液体が洩れると
いう問題があった。(Problems to be Solved by the Invention) However, in this proposed technique, the protruding part of the block body surrounding the rubber movable body is vulcanized and bonded to the surrounding rubber sleeve. There was a problem in that due to repeated loads being applied to the vibration isolator, stress concentrates on the vulcanized bond at a relatively early stage, causing cracks and leakage of liquid.
これをより具体的に述べるならば、内外筒の軸線と直交
する方向へ作用してそれぞれの液室を圧縮方向および拡
張方向へ変形させる４０ｋｇの荷重を負荷した状態で、
内外筒をそれらの周方向へ±１５８相対変位させる捩り
荷重を、３Ｈｚの周波数にて作用させた場合における繰
返し耐久回数は、提案技術によれば約４３万回であり、
この繰返し回数で、ゴムスリーブの突出部からの亀裂液
洩れが発生したが、高周波小振幅振動を吸収し得ない前
述した従来の防振装置によれば、１５０万回の繰返しに
よっても何の異常も発生しないことが確認されている。To describe this more specifically, when a load of 40 kg is applied that acts in a direction perpendicular to the axis of the inner and outer cylinders and deforms each liquid chamber in the compression direction and expansion direction,
According to the proposed technology, when a torsional load that causes a relative displacement of ±158 in the circumferential direction of the inner and outer cylinders is applied at a frequency of 3 Hz, the durability is approximately 430,000 times.
After this number of repetitions, cracks and liquid leakage occurred from the protruding part of the rubber sleeve, but according to the conventional vibration isolating device described above, which cannot absorb high frequency and small amplitude vibrations, no abnormality occurred even after 1.5 million repetitions. It has been confirmed that this does not occur.
そこで、この発明は、繰返し荷重の１５０万回の作用に
よっても全く異常を生じることがなく、しかも、低周波
大振幅振動の減衰および高周波小振幅振動の吸収を十分
にもたらし得る液入り防振装置を提供する。Therefore, the present invention provides a liquid-filled vibration isolator that does not cause any abnormality even after 1.5 million repeated loads and is capable of sufficiently damping low-frequency, large-amplitude vibrations and sufficiently absorbing high-frequency, small-amplitude vibrations. I will provide a.
（問題点を解決するための手段）
この発明は、たとえば同心配置した内筒および外筒を、
ゴム、ゴム状弾性材料、合成樹脂などからなるまたはそ
れらのいずれかを主体とする弾性体にて相互連結すると
ともに、これらの内外筒間に、周方向に間隔をおいて区
画され、かつ、内部に、非圧縮性の液体を封入された複
数の液室を設け、そしてこれらの液室を、絞り通路によ
って相互に連通させてなる液入り防振装置において、弾
性体内に、いずれか二個の液室にそれぞれ開口する筒状
ケーシングを嵌め込み固定し、この筒状ケーシング内に
、それぞれ液室内圧の差圧によって変位される振動部材
を配設してなる。(Means for Solving the Problems) This invention provides, for example, an inner cylinder and an outer cylinder arranged concentrically,
The inner and outer cylinders are interconnected by an elastic body made of or mainly made of rubber, rubber-like elastic material, synthetic resin, etc., and are partitioned at intervals in the circumferential direction between these inner and outer cylinders, and have inner and outer cylinders. In a liquid-filled vibration isolator, a plurality of liquid chambers filled with an incompressible liquid are provided, and these liquid chambers are communicated with each other through a throttle passage. A cylindrical casing having an opening in each liquid chamber is fitted and fixed, and a vibrating member is disposed inside each cylindrical casing, the vibrating member being displaced by a pressure difference between the internal pressures of the liquid chambers.
（作 用）
この防振装置では、そこへ低周波大振幅振動が伝達され
た場合には、一方の液室が圧縮され、そして他方の液室
が拡張される方向の外力の作用に基づき、一方の液室内
の流体が、振動部材の変位下にて、絞り通路を経て他方
の液室内へ流動することにより、絞り通路の作用によっ
てその振動の十分有効なる減衰がもたらされることにな
る。(Function) In this vibration isolator, when low frequency, large amplitude vibration is transmitted thereto, one liquid chamber is compressed and the other liquid chamber is expanded based on the action of an external force. The fluid in one of the fluid chambers flows into the other fluid chamber through the throttle channel under the displacement of the vibrating member, so that the action of the throttle channel results in a sufficiently effective damping of the vibrations.
そしてまたこの防振装置に、高周波小振幅振動が伝達さ
れることによって、絞り通路が閉塞状態となった場合に
は、絞り通路を通る液体の流動は実質上不可能となるも
、それぞれの液室内圧の増減に応じて振動部材が筒状ケ
ーシング内で変位することにより、液室内圧のとくに増
加が有効に防止されるので、その振動に起因する動的ば
ね定数の増加が十分に抑制されることになる。If the throttle passage becomes blocked due to the transmission of high-frequency, small-amplitude vibrations to this vibration isolator, the flow of liquid through the throttle passage becomes virtually impossible; By displacing the vibrating member within the cylindrical casing in response to increases and decreases in the chamber pressure, an increase in the liquid chamber pressure in particular is effectively prevented, so an increase in the dynamic spring constant due to the vibration is sufficiently suppressed. That will happen.
さらにこの防振装置では、内側に振動部材を配設した筒
状ケーシングを、弾性体の圧縮変形下にてそこへ嵌め込
み固定しており、そのケーシングと弾性体とは非接着状
態にあるので、内外筒に、それらの半径方向および周方
向の大きな相対変位が生じても、筒状ケーシングによる
弾性体の変形の制限、いいかえれば、弾性体の変形に際
するケーシング周面への応力集中がなく、この結果とし
て、弾性体ひいては装置の耐久性を、前述した提案技術
の３倍以上にまで向上させることができる。Furthermore, in this vibration isolator, a cylindrical casing with a vibrating member arranged inside is fitted and fixed into the cylindrical casing under compressive deformation of the elastic body, and the casing and the elastic body are in a non-adhered state. Even if a large relative displacement occurs between the inner and outer cylinders in the radial and circumferential directions, the cylindrical casing does not limit the deformation of the elastic body, or in other words, there is no stress concentration on the casing circumferential surface when the elastic body deforms. As a result, the durability of the elastic body and thus the device can be improved to more than three times that of the above-mentioned proposed technology.
（実施例） 以下にこの発明を図示例に基づいて説明する。(Example) The present invention will be explained below based on illustrated examples.
第１図はこの発明の一実施例を示す断面図であり、図中
１．２はそれぞれ、金属、合成樹脂などの剛性材料から
なる内筒および外筒を示し、ここでは、同心配置したこ
れらの内外筒１，２を、弾性体３によって相互連結する
。FIG. 1 is a sectional view showing an embodiment of the present invention, and 1 and 2 in the figure respectively indicate an inner cylinder and an outer cylinder made of rigid materials such as metal and synthetic resin, and here, these are arranged concentrically. The inner and outer cylinders 1 and 2 are interconnected by an elastic body 3.
ここで、ゴム、ゴム弾性体、合成樹脂などを主体として
構成することができる全体としてほぼ円筒状の弾性体３
は、その外周部分に、軸線方向へ離間する中間リング３
ａ、 ３ａを存しており、この弾性体３は、その内周面
を内筒１に加硫その他によって接合する一方、中間リン
グ３ａ、 ３ａの外周に、０リング４．４を介して外筒
２をかしめ加工その他によって固定することにより、内
外筒１，２の相互連結をもたらす。Here, the elastic body 3 has a generally cylindrical shape as a whole and can be mainly composed of rubber, rubber elastic body, synthetic resin, etc.
has an intermediate ring 3 spaced apart in the axial direction on its outer circumference.
a, 3a, and the inner circumferential surface of the elastic body 3 is joined to the inner cylinder 1 by vulcanization or other means, while the elastic body 3 is attached to the outer circumference of the intermediate rings 3a, 3a via an O-ring 4.4. By fixing the tube 2 by caulking or other means, the inner and outer tubes 1 and 2 are interconnected.
またここでは、内外筒１，２間で、弾性体３の軸線方向
の中央部位置に、直径方向に対抗させて区画され、かつ
、所要の動粘性率を有する液体を封入された二個の液室
５．６をそれぞれ設け、そしてこれらの両液室５，６を
、雨中間リング３ ａ ＋３ａ間で、弾性体３の外周面
に接合もしくは嵌め込み固定した剛性弧状片７の周方向
溝と、外筒２の内周面とで形成される一本の絞り通路８
によって相互に連通させる。ここでこの絞り通路８の長
さは、それを内外筒１．２の軸線方向へ蛇行させること
その他によって適宜に変更することができる。In addition, here, two tubes are defined between the inner and outer cylinders 1 and 2 at the central position in the axial direction of the elastic body 3, diametrically opposed to each other, and filled with a liquid having a required kinematic viscosity. Liquid chambers 5 and 6 are respectively provided, and these liquid chambers 5 and 6 are connected to the circumferential groove of a rigid arc-shaped piece 7 that is fixed by being joined or fitted to the outer peripheral surface of the elastic body 3 between the rain intermediate ring 3a + 3a. , and the inner circumferential surface of the outer cylinder 2.
communicate with each other. Here, the length of this throttle passage 8 can be changed as appropriate by making it meander in the axial direction of the inner and outer cylinders 1.2, or by other means.
また図中９．１０は、それぞれの液室内へ、半径方向外
方へ向けて突出させたストッパを示し、たとえば図示の
ように、内筒１の所要位置に剛性ブロックを嵌め合わせ
固定することにて構成できるこれらのストッパ９，１０
は、好ましくは、それらの先端面上に形成した弾性皮膜
の緩衝作用下で、内外筒１．２の過剰なる相対変位を防
止すべく機能する。Reference numeral 9.10 in the figure indicates a stopper that protrudes outward in the radial direction into each liquid chamber. These stoppers 9, 10 can be configured with
preferably function to prevent excessive relative displacement of the inner and outer cylinders 1.2 under the cushioning effect of an elastic coating formed on their tip surfaces.
なお、これらのストッパ９．１０は、剛性部材を、外筒
側から内筒側へ向けてそれぞれの液室５．６内へ突出さ
せることにより構成することもできる。Note that these stoppers 9.10 can also be constructed by making a rigid member protrude into the respective liquid chambers 5.6 from the outer cylinder side toward the inner cylinder side.
そしてさらに図示例では、絞り通路８と直径方向に対抗
する位置で、弾性体３内に、外筒２の内周面に沿ってそ
の周方向へ延在する筒状ケーシング１１を嵌め込み固定
し、この筒状ケーシング１１を両液室５，６にそれぞれ
開口させ、また、このケーシング内に、その形状に沿っ
て彎曲する振動部材１２を、外筒２の周方向へ変位可能
に配置する。Further, in the illustrated example, a cylindrical casing 11 extending in the circumferential direction along the inner circumferential surface of the outer cylinder 2 is fitted and fixed into the elastic body 3 at a position diametrically opposed to the throttle passage 8, The cylindrical casing 11 is opened to both liquid chambers 5 and 6, and a vibrating member 12 curved along the shape of the casing is disposed within the casing so as to be movable in the circumferential direction of the outer cylinder 2.
ここで好ましくは、合成樹脂その他の低比重材料にて構
成されるこの振動部材１２は、それぞれの液室５．６へ
の突出端部分に、長さ方向の断面形状がほぼＴ字状をな
す受圧部１２ａ、 １２ｂを有する。また、振動部材１
２の断面積は、所要の低周波帯域での振動の減衰に寄与
する絞り通路８のそれよりも相当大きくすることが、振
動部材の目詰りがおそくなり、低い動的ばね定数を高周
波帯域まで達成する上で好ましい。Preferably, the vibrating member 12 made of synthetic resin or other low specific gravity material has a substantially T-shaped cross-sectional shape in the longitudinal direction at the protruding end portion toward each liquid chamber 5.6. It has pressure receiving parts 12a and 12b. In addition, the vibration member 1
The cross-sectional area of 2 should be made considerably larger than that of the throttle passage 8, which contributes to damping vibration in the required low frequency band, so that clogging of the vibrating member is slowed and a low dynamic spring constant can be maintained in the high frequency band. preferred in terms of achievement.
ここで、筒状ケーシング１１内への振動部材１２の組み
付けは、たとえば、第２図に示すように、所定の長さを
有し、はぼチャンネル状をなす合成樹脂製もしくは金属
製の枠体１１ａ内へ、振動部材１２を入れ込み、次いで
、その枠体１１ａの開放壁部を、これも合成樹脂製もし
くは金属製の側壁部材１１ｂによって閉止することによ
り行うことができ、このようにして組み付けられた筒状
ケーシング１１および振動部材１２は、弾性体３に設け
た外周溝内へ、筒状ケーシング１１を、その外周溝の周
りでの弾性体３の圧縮変形下で嵌め込むことにより、弾
性体３に固定される。Here, as shown in FIG. 2, the vibration member 12 is assembled into the cylindrical casing 11 by using a synthetic resin or metal frame having a predetermined length and a hollow channel shape. This can be done by inserting the vibrating member 12 into the frame 11a, and then closing the open wall portion of the frame 11a with a side wall member 11b also made of synthetic resin or metal. The cylindrical casing 11 and vibration member 12 are formed by fitting the cylindrical casing 11 into an outer circumferential groove provided in the elastic body 3 under compressive deformation of the elastic body 3 around the outer circumferential groove. It is fixed at 3.
なお以上に述べた実施例において、絞り通路８を、振動
部材１２の内部もしくはストッパ９．１ｏの内部に形成
することも可能であり、かかる場合には、剛性弧状片７
を省いて弾性体３の外周面を外筒２の内周面に直接的に
密接させることができ、また、振動部材１２を、第３図
に示すように、相互に対向する表面に、所要に応じた溝
部８ａ、 ８ｂをそれぞれ有する半割部材１２ｃ、 １
２ｄの相互接合によってもたらすことができる。In the embodiment described above, it is also possible to form the throttle passage 8 inside the vibrating member 12 or inside the stopper 9.1o, and in such a case, the rigid arcuate piece 7
The outer circumferential surface of the elastic body 3 can be directly brought into close contact with the inner circumferential surface of the outer cylinder 2 by omitting the Half members 12c and 1 each have grooves 8a and 8b according to the
2d mutual bonding.
このように構成してなる防振装置では、内筒１もしくは
外筒２への低周波大振幅振動の伝達によって、いずれか
一方の液室に、その圧縮方向の、また他方の液室に拡張
方向の外力がそれぞれ作用した場合には、圧縮液室内の
液体が、振動部材１２の変位下にて、一本の絞り通路８
を経て他方の液室内へ流入する。これがため、流動液体
は、絞り通路８によって、それが有する運動エネルギー
を熱エネルギーに変換されることになり、振動の十分有
効なる減衰がもたらされる。In the vibration isolating device configured in this way, by transmitting low-frequency, large-amplitude vibration to the inner cylinder 1 or the outer cylinder 2, it expands into either one of the liquid chambers in the compression direction and into the other liquid chamber. When an external force in each direction is applied, the liquid in the compressed liquid chamber flows through one throttle passage 8 under the displacement of the vibrating member 12.
and flows into the other liquid chamber. This causes the flowing liquid to convert its kinetic energy into thermal energy by means of the throttle channel 8, resulting in a sufficiently effective damping of vibrations.
この一方において、防振装置に高周波小振幅振動が伝達
されることにより、絞り通路８が閉塞状態となった場合
には、それぞれの液室内圧の増減傾向に応答して振動部
材１２が筒状ケーシング１１内で円滑に変位して液室内
圧のとくに増加を有効に抑制するので、動的ばね定数の
増加が十分に防止されることになる。On the other hand, when the throttle passage 8 becomes closed due to high frequency and small amplitude vibration being transmitted to the vibration isolator, the vibration member 12 becomes cylindrical in response to the tendency of increase/decrease in the pressure in each liquid chamber. Since it is smoothly displaced within the casing 11 and effectively suppresses an increase in the internal pressure of the liquid, an increase in the dynamic spring constant is sufficiently prevented.
またこの防振装置では、筒状ケーシング１１を、弾性体
３に対して非接着状態としているので、弾性体３は、筒
状ケーシング１１に拘束されることなく、いいかえれば
、その内部はもちろん、それと筒状ケーシング１１との
隣接部分に応力の集中をもたらすことなく、自由に弾性
変形することができ、これがため、弾性体３の耐久性の
著しい向上がもたらされることになる。Furthermore, in this vibration isolator, since the cylindrical casing 11 is not bonded to the elastic body 3, the elastic body 3 is not restrained by the cylindrical casing 11; The elastic body 3 can be freely elastically deformed without causing stress concentration in the adjacent portion of the cylindrical casing 11, and as a result, the durability of the elastic body 3 is significantly improved.
ちなみに、図示例の装置では、その内外筒１゜２の軸線
と直交する方向へ作用してそれぞれの液室５，６を圧縮
方向および拡張方向へ変形させる４０ｋｇの荷重を負荷
した状態で、内外筒１，２をそれらの周方向へ±１５°
相対変位させる捩り荷重を、３Ｈｚの周波数にて作用さ
せた場合に、１５０万回の繰返し荷重に対しても何の異
常も生じないことが確認されている。従って、この防振
装置の繰返し荷重に対する耐久性は、特開昭６０−１７
９５４２号公報に開示された防振装置のそれの３倍以上
にも達することになる。Incidentally, in the illustrated example, a load of 40 kg acting in a direction perpendicular to the axes of the inner and outer cylinders 1°2 deforms the respective liquid chambers 5 and 6 in the compression direction and the expansion direction is applied. Tubes 1 and 2 in their circumferential direction ±15°
It has been confirmed that when a torsional load that causes relative displacement is applied at a frequency of 3 Hz, no abnormality occurs even when the load is repeated 1.5 million times. Therefore, the durability of this vibration isolator against repeated loads is
This is more than three times that of the vibration isolator disclosed in Japanese Patent No. 9542.
第４図はこの発明の他の実施例を示す断面図であり、こ
の例は、弾性体３の外周面の、直径方向に対抗する二個
所に、筒状ケーシング１１．１１を前述したと同様に嵌
め込み固定し、そしてこれらの各ケーシング１１内に、
振動部材１２を変位可能に嵌め合わせ、さらに、ストッ
パ９，１０内に絞り通路８を形成したものである。FIG. 4 is a cross-sectional view showing another embodiment of the present invention, in which cylindrical casings 11 and 11 are disposed at two diametrically opposed locations on the outer peripheral surface of the elastic body 3, similar to those described above. and fixed in each casing 11,
A vibrating member 12 is fitted in a movable manner, and a throttle passage 8 is formed in the stoppers 9 and 10.
なお、図示はしないが、ここでは一方のストッパ９の先
端から内筒１の周りを経て他方のストッパ１０の先端ま
で延在する絞り通路８を、図に示す横断面内もしくはそ
の面と直行する面内にて所要に応じて紅白させることも
でき、また、その絞り通路８を、少なくとも一方の振動
部材内に形成することもできる。Although not shown, the throttle passage 8 extending from the tip of one stopper 9 through the inner cylinder 1 to the tip of the other stopper 10 is arranged within the cross section shown in the figure or perpendicular to that plane. It is also possible to make the surface red and white as required, and the throttle passage 8 can also be formed in at least one of the vibrating members.
この例によれば、振動部材１２の総断面積を十分大きく
することができるので、振動部材１２の目詰りがおそく
なり、高周波帯域に至るまで低い動的ばね定数を維持す
ることができる。なお、図示装置の他の作動は前述した
ところと同様である。According to this example, since the total cross-sectional area of the vibrating member 12 can be made sufficiently large, clogging of the vibrating member 12 is slowed down, and a low dynamic spring constant can be maintained up to the high frequency band. Note that the other operations of the illustrated device are the same as those described above.
以上この発明を図示例に基づいて説明したが、絞り通路
８を、弾性体３の、ゴムその他からなる主体部分の内部
に形成することも可能であり、また、図示例では弾性体
３の外周面に嵌め込み固定している一個もしくは二個の
ケーシング１１を、弾性体３の外周面と、ストッパ用剛
性ブロックとの間で、弾性体３に設けた貫通孔内に嵌め
込み固定することもでき、かかる場合には、弾性体３の
外周面を、外筒２の内周面に直接的に密着させること、
または雨中間リング３ａ、 ３ａの相互連結をもたらす
図示しない中間筒の内周面に密着させることも可能であ
る。さらに、図示例では二個としている液室の数を三個
以上の複数個とすること、振動部材１２の変位方向を図
示例の上下方向その他の所要方向とすることもできる。Although the present invention has been described above based on the illustrated example, it is also possible to form the throttle passage 8 inside the main portion of the elastic body 3 made of rubber or the like; One or two casings 11 that are fitted and fixed on the surface can also be fitted and fixed in a through hole provided in the elastic body 3 between the outer peripheral surface of the elastic body 3 and the rigid block for the stopper, In such a case, the outer circumferential surface of the elastic body 3 should be directly brought into close contact with the inner circumferential surface of the outer cylinder 2;
Alternatively, it is also possible to make it closely contact the inner circumferential surface of an intermediate cylinder (not shown) that interconnects the rain intermediate rings 3a, 3a. Furthermore, the number of liquid chambers, which is two in the illustrated example, may be increased to three or more, and the direction of displacement of the vibrating member 12 may be the vertical direction in the illustrated example or any other desired direction.
（発明の効果）
従って、この発明によれば、防振装置へ伝達される低周
波大振幅振動を、絞り通路の作用下にて有効に減衰させ
得ることはもちろん、高周波小振幅振動の伝達に起因す
る動的ばね定数の増加を十分に抑制することができ、さ
らには、筒状ケーシングを弾性体に対して非接着状態と
することにより、防振装置の耐久性を著しく向上させる
ことができる。(Effects of the Invention) Therefore, according to the present invention, it is possible to effectively attenuate low-frequency, large-amplitude vibrations transmitted to the vibration isolator under the action of the throttle passage, and also to effectively attenuate low-frequency, large-amplitude vibrations transmitted to the vibration isolator. The resulting increase in dynamic spring constant can be sufficiently suppressed, and furthermore, by making the cylindrical casing non-adherent to the elastic body, the durability of the vibration isolator can be significantly improved. .
第１図はこの発明の一実施例を示す断面図、第２図は筒
状ケーシングへの振動部材の組付例を示す分解斜視図、
第３図は振動部材を例示する分解斜視図、第４図はこの
発明の他の実施例を示す断面図である。
１・・・内筒 ２・・・外筒３・・・弾性
体 ５．６・・・液室８・・・絞り通路
９，１０・・・ストッパ１１・・・筒状ケーシン
グ １２・・・振動部材第２図 第３図
第４図FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is an exploded perspective view showing an example of how a vibrating member is assembled to a cylindrical casing, FIG. 3 is an exploded perspective view showing an example of the vibrating member, and FIG. FIG. 4 is a sectional view showing another embodiment of the present invention. 1... Inner cylinder 2... Outer cylinder 3... Elastic body 5.6... Liquid chamber 8... Throttle passage
9, 10... Stopper 11... Cylindrical casing 12... Vibration member Fig. 2 Fig. 3 Fig. 4
Claims (1)
弾性体と、内外筒間で、周方向に間隔をおいて区画され
、内部に液体を封入された複数の液室と、これらの液室
の相互の連通をもたらす絞り通路とを具える液入り防振
装置において、 前記弾性体内に、いずれか二個の液室にそ れぞれ開口する筒状ケーシングを嵌め込み固定し、この
筒状ケーシング内に、それぞれの液室内圧の差圧によっ
て変位される振動部材を配設してなる液入り防振装置。[Claims] 1. An inner tube, an outer tube, an elastic body interconnecting these inner and outer tubes, and a plurality of tubes partitioned at intervals in the circumferential direction between the inner and outer tubes and having a liquid sealed inside. A liquid-filled vibration isolator comprising liquid chambers and a throttle passage that brings these liquid chambers into communication with each other, wherein a cylindrical casing opening into each of the two liquid chambers is fitted and fixed into the elastic body. A liquid-filled vibration isolator is provided in this cylindrical casing with a vibrating member that is displaced by a pressure difference between the internal pressures of the respective liquids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25680285A JPH0689807B2 (en) | 1985-11-18 | 1985-11-18 | Anti-vibration device with liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25680285A JPH0689807B2 (en) | 1985-11-18 | 1985-11-18 | Anti-vibration device with liquid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62118132A true JPS62118132A (en) | 1987-05-29 |
| JPH0689807B2 JPH0689807B2 (en) | 1994-11-14 |
Family
ID=17297641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25680285A Expired - Lifetime JPH0689807B2 (en) | 1985-11-18 | 1985-11-18 | Anti-vibration device with liquid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0689807B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2619180A1 (en) * | 1987-08-04 | 1989-02-10 | Hutchinson | IMPROVEMENTS ON HYDRAULIC ANTIVIBRATORY SUPPORT SLEEVES |
| JPH0198718A (en) * | 1986-09-06 | 1989-04-17 | Marugo Rubber Kogyo Kk | Liquid seal type elastic bush |
| EP0326504A2 (en) * | 1988-01-26 | 1989-08-02 | The Goodyear Tire & Rubber Company | Bush type hydraulically damped engine or transmission mount |
| US4856750A (en) * | 1987-04-13 | 1989-08-15 | Automobiles Peugeot | Hydroelastic support, in particular for the suspension of a vehicle engine |
| US4971456A (en) * | 1988-10-08 | 1990-11-20 | Tokai Rubber Industries, Ltd. | Fluid-filled elastic center bearing mount |
| JPH06257641A (en) * | 1992-12-14 | 1994-09-16 | Carl Freudenberg:Fa | Bush type bearing device |
| FR2710384A1 (en) * | 1993-09-24 | 1995-03-31 | Boge Gmbh | Elastic rubber support, with hydraulic damping. |
| EP0697544A3 (en) * | 1994-08-10 | 1997-06-04 | Gencorp Inc | Fluid damped bushings |
| WO2001025650A1 (en) * | 1999-10-06 | 2001-04-12 | ZF Lemförder Metallwaren AG | Hydraulically damping rubber bearing with a decoupling element |
| JP2020200932A (en) * | 2019-06-13 | 2020-12-17 | 株式会社ブリヂストン | Liquid seal bush and suspension device |
-
1985
- 1985-11-18 JP JP25680285A patent/JPH0689807B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0198718A (en) * | 1986-09-06 | 1989-04-17 | Marugo Rubber Kogyo Kk | Liquid seal type elastic bush |
| US4856750A (en) * | 1987-04-13 | 1989-08-15 | Automobiles Peugeot | Hydroelastic support, in particular for the suspension of a vehicle engine |
| FR2619180A1 (en) * | 1987-08-04 | 1989-02-10 | Hutchinson | IMPROVEMENTS ON HYDRAULIC ANTIVIBRATORY SUPPORT SLEEVES |
| EP0326504A2 (en) * | 1988-01-26 | 1989-08-02 | The Goodyear Tire & Rubber Company | Bush type hydraulically damped engine or transmission mount |
| US4971456A (en) * | 1988-10-08 | 1990-11-20 | Tokai Rubber Industries, Ltd. | Fluid-filled elastic center bearing mount |
| JPH06257641A (en) * | 1992-12-14 | 1994-09-16 | Carl Freudenberg:Fa | Bush type bearing device |
| FR2710384A1 (en) * | 1993-09-24 | 1995-03-31 | Boge Gmbh | Elastic rubber support, with hydraulic damping. |
| BE1007986A5 (en) * | 1993-09-24 | 1995-12-05 | Boge Gmbh | Support flexible rubber, hydraulic amortization. |
| EP0697544A3 (en) * | 1994-08-10 | 1997-06-04 | Gencorp Inc | Fluid damped bushings |
| WO2001025650A1 (en) * | 1999-10-06 | 2001-04-12 | ZF Lemförder Metallwaren AG | Hydraulically damping rubber bearing with a decoupling element |
| US6511058B1 (en) | 1999-10-06 | 2003-01-28 | ZF Lemförder Metallwaren AG | Hydraulically damping rubber bearing with uncoupling element |
| JP2020200932A (en) * | 2019-06-13 | 2020-12-17 | 株式会社ブリヂストン | Liquid seal bush and suspension device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0689807B2 (en) | 1994-11-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4971456A (en) | Fluid-filled elastic center bearing mount | |
| US4702346A (en) | Vibration insulator | |
| US7314213B2 (en) | Fluid-filled vibration damping device | |
| US4838529A (en) | Liquid-filled vibration isolating devices | |
| US4899997A (en) | Fluid filled resilient bushing | |
| JPS63318339A (en) | Vibration absorbing device | |
| US4872651A (en) | Fluid filled resilient bushing | |
| US5060918A (en) | Fluid-filled cylindrical elastic connector having two orifice passages with different cross sectional areas | |
| US4893798A (en) | Fluid-filled elastic bushing having means for limiting elastic deformation of axial end portions of elastic member defining pressure-receiving chamber | |
| JP2006189153A (en) | Damping force adjustable elastomer/fluid pressure type vibration isolator | |
| JPS62118132A (en) | Vibration isolator including liquid | |
| US4697795A (en) | Hydraulically damped mounting device | |
| US5333847A (en) | Elastic mount having at least two orifices formed by rubber filler on orifice-defining structure which extends along at least one of two fluid chambers | |
| JP2002327788A (en) | Vibrationproof device sealed with fluid | |
| JPS62184249A (en) | Fluid enclosing-type vibro-isolating support body | |
| US5123633A (en) | Fluid-filled elastic rotational coupling having two fluid chambers on each side of wing members | |
| JPS62118133A (en) | Vibration isolator containing liquid | |
| US4941649A (en) | Fluid-filled cylindrical elastic mount having means for improved durability of elastic body | |
| KR100261668B1 (en) | Fluid-filled cylindrical vibration damping device having different resonance frequencies of fluid | |
| US5547173A (en) | Fluid-filled cylindrical elastic mount having three fluid chambers and three orifices, with one valve means provided in one orifice | |
| JPS62200047A (en) | Fluid self-contained vibration-proofing link work | |
| JPH01164831A (en) | Fluid-filled type cylinder type mount | |
| JPS62261730A (en) | Vibration damping device | |
| JP5363363B2 (en) | Fluid filled vibration isolator | |
| JPH0524837Y2 (en) |