JPH10252812A - Liquid sealing type vibration control mount - Google Patents
Liquid sealing type vibration control mountInfo
- Publication number
- JPH10252812A JPH10252812A JP6420097A JP6420097A JPH10252812A JP H10252812 A JPH10252812 A JP H10252812A JP 6420097 A JP6420097 A JP 6420097A JP 6420097 A JP6420097 A JP 6420097A JP H10252812 A JPH10252812 A JP H10252812A
- Authority
- JP
- Japan
- Prior art keywords
- fluid chamber
- main fluid
- main
- cylinder
- inner cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Combined Devices Of Dampers And Springs (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えば自動車のエ
ンジン等を支承するために用いられるブッシュタイプの
液体封入式防振マウントに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bush type liquid-filled anti-vibration mount used for supporting, for example, an automobile engine.
【０００２】[0002]
【従来の技術】従来より、この種の液体封入式防振マウ
ントとして、内筒体と、外筒体と、両筒体間を連結する
弾性体と、この弾性体中に画成されて内筒体と外筒体と
の相対変位による圧力を受ける主流体室と、この主流体
室からの液体がオリフィスを通して流入される副流体室
とを備え、この副流体室の一部がダイヤフラムにより仕
切られて副流体室の液体の容積が拡縮可能にされたもの
が、一般に知られている。また、上記のダイヤフラムを
省略することを目的として、副流体室を内筒体よりも上
方位置に画成しその副流体室に対し液体に加えて空気を
封入し、その空気部分の圧縮・膨脹作用を利用して副流
体室内の液体部分の容積の拡縮を行なわせるようにした
エアダイアフラム式のものも知られている（例えば特開
平７−１５１１８３号公報）。そして、この公報で開示
されたものにおいては、内筒体を挟んで略水平方向に外
筒体側に延びる弾性体を上記水平方向の中央位置が最下
点となるＶ字状に形成し、このＶ字状の弾性体の下面に
より主流体室の上面が画成されるようにし、そのＶ字状
の両側上端位置にそれぞれオリフィスの下端開口を位置
させることにより、主流体室側の液体に混入した気泡が
上記Ｖ字状の弾性体下面に沿って上方に案内されそれぞ
れオリフィスを通して副流体室に導かれるようにしてい
る。2. Description of the Related Art Heretofore, as this type of liquid-filled anti-vibration mount, an inner cylinder, an outer cylinder, an elastic body connecting between the two cylinders, and an inner body defined in the elastic body. It has a main fluid chamber that receives pressure due to the relative displacement between the cylinder and the outer cylinder, and a sub-fluid chamber into which liquid from the main fluid chamber flows through the orifice. A part of the sub-fluid chamber is partitioned by a diaphragm. It is generally known that the volume of the liquid in the auxiliary fluid chamber is made expandable and contractable. Also, for the purpose of omitting the above-mentioned diaphragm, a sub-fluid chamber is defined above the inner cylinder, air is added to the sub-fluid chamber in addition to liquid, and the air portion is compressed and expanded. There is also known an air diaphragm type in which the volume of the liquid portion in the sub-fluid chamber is expanded and contracted by utilizing the action (for example, Japanese Patent Application Laid-Open No. Hei 7-151183). In the technique disclosed in this publication, an elastic body extending substantially horizontally toward the outer cylinder with the inner cylinder interposed therebetween is formed in a V-shape in which the horizontal center position is the lowest point. The upper surface of the main fluid chamber is defined by the lower surface of the V-shaped elastic body, and the lower end openings of the orifices are located at the upper ends of both sides of the V-shape, respectively, so that the liquid is mixed into the liquid in the main fluid chamber. The generated bubbles are guided upward along the lower surface of the V-shaped elastic body, and are guided to the sub-fluid chamber through the respective orifices.
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記のエア
ダイアフラム式の従来の液体封入式防振マウントにおい
ては、主流体室への気泡の滞留や残留を防止するために
弾性体をＶ字状しているため、両オリフィスを内筒体の
筒軸に直交する方向であって水平方向両側の外筒体寄り
の位置に設けると、そのオリフィスの通路長が比較的短
いものとなり、所望の低周波域での液柱共振を得るため
にはそのオリフィスの断面積を上記の通路長に対応して
比較的小さいものに設定することになってしまう。この
ため、上記の低周波域での損失係数（tan δ）のピーク
値をそれ程高くすることができず低周波域での防振効果
として十分なものを得難くなる。また、弾性体をＶ字状
にしているため、例えば自動車のエンジンを支承する場
合、そのエンジンの配置等の種々の支承条件に対処しつ
つ主流体室への気泡の滞留や残留を防止することが困難
になる場合がある。すなわち、上記の内筒体の筒軸に直
交する方向であって水平方向に対する弾性体の剛性につ
いて、その水平方向一側に入力する外力に対しては剛性
を相対的に小さく逆に水平方向他側に対する剛性を相対
的に大きくさせたいという要求がある場合等において
は、上記の弾性体をＶ字状にするとという構成を採用し
つつ上記の要求を十分に満足させることは困難なものと
なる。However, in the above-mentioned conventional liquid diaphragm type vibration damping mount of the air diaphragm type, the elastic body is formed in a V-shape to prevent air bubbles from staying or remaining in the main fluid chamber. Therefore, if both orifices are provided in the direction perpendicular to the cylinder axis of the inner cylinder and at positions on both sides in the horizontal direction near the outer cylinder, the path length of the orifices becomes relatively short, and the desired low frequency In order to obtain the liquid column resonance in the region, the cross-sectional area of the orifice is set to be relatively small corresponding to the above-mentioned passage length. For this reason, the peak value of the loss coefficient (tan δ) in the low frequency range cannot be increased so much, and it is difficult to obtain a sufficient vibration isolation effect in the low frequency range. Further, since the elastic body is formed in a V-shape, for example, when supporting an engine of a car, it is necessary to prevent stagnation or remaining of bubbles in the main fluid chamber while coping with various support conditions such as the arrangement of the engine. May be difficult. That is, the rigidity of the elastic body in a direction perpendicular to the cylinder axis of the inner cylinder and in the horizontal direction is relatively small with respect to an external force input to one side in the horizontal direction. In the case where there is a demand to make the rigidity relative to the side relatively large, it is difficult to sufficiently satisfy the above demand while adopting a configuration in which the above-mentioned elastic body is formed in a V-shape. .
【０００４】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、気体を封入し
てダイヤフラムを省略するようにしたものにおいて、低
周波域での防振効果を十分に得つつ主流体室内の気体の
滞留や残留を確実に防止し得るようにすることにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a device in which a gas is sealed and a diaphragm is omitted to provide a vibration-proof effect in a low frequency range. Therefore, it is possible to reliably prevent stagnation and residue of gas in the main fluid chamber while obtaining sufficient pressure.
【０００５】[0005]
【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、筒軸が横向きに配置された
内筒体と、この内筒体の周囲を囲む外筒体と、この外筒
体と上記内筒体とを互いに連結する弾性体と、上記内筒
体の下側位置の弾性体中に画成された主流体室と、上記
内筒体の上側位置に画成された副流体室と、これら主流
体室及び副流体室に封入された液体及び気体と、上記主
流体室と副流体室とを互いに連通するオリフィスとを備
えた液体封入式防振マウントを前提とし以下のように構
成するものである。すなわち、上記主流体室と副流体室
とを互いに連通して気体を上記副流体室に導く連通孔を
上記オリフィスとは別に形成するとともに、上記主流体
室の内部上面を画成する上記弾性体の下面に、上記連通
孔の主流体室側開口に向かい徐々に上昇して気泡を上記
連通孔の主流体室側開口に導く案内面を形成する。そし
て、上記連通孔を、上記オリフィスの共振周波数におい
てその連通孔を通しての液体の流動が実質的に停止され
る径及び長さに設定するものである。In order to achieve the above object, an invention according to claim 1 comprises an inner cylinder having a cylinder axis arranged laterally, and an outer cylinder surrounding the inner cylinder. An elastic body that connects the outer cylinder and the inner cylinder to each other, a main fluid chamber defined in the lower elastic body of the inner cylinder, and an upper portion of the inner cylinder. A liquid-filled anti-vibration mount including a formed sub-fluid chamber, liquid and gas sealed in the main fluid chamber and the sub-fluid chamber, and an orifice communicating the main fluid chamber and the sub-fluid chamber with each other. It is assumed that it is configured as follows. That is, a communication hole that communicates the main fluid chamber and the sub-fluid chamber with each other and guides gas to the sub-fluid chamber is formed separately from the orifice, and the elastic body that defines an inner upper surface of the main fluid chamber is formed. A guide surface is formed on the lower surface of the communication hole to gradually rise toward the opening of the communication hole on the main fluid chamber side and guide bubbles to the opening of the communication hole on the main fluid chamber side. The communication hole is set to have a diameter and a length at which the flow of the liquid through the communication hole is substantially stopped at the resonance frequency of the orifice.
【０００６】上記の構成の場合、主流体室の内部上面を
構成する弾性体の下面が連通孔の主流体室側開口に向か
い徐々に上昇する案内面として構成されているため、主
流体室の液体内に滞留もしくは残留した気泡が液体内を
上記案内面まで上昇し、ついで、その案内面に沿って自
然に連通孔の主流体室側開口まで導かれることになる。
そして、上記の気泡は上記連通孔を通して副流体室に導
かれ、気泡が主流体室に残留することはない。また、上
記案内面が連通孔の主流体室側開口まで徐々に上昇する
ように形成されているため、上記オリフィスの主流体室
側開口は連通孔の主流体室側開口よりも必然的に下方に
位置することになる。この結果、オリフィスの副流体室
までの通路長も従来の弾性体をＶ字状にして鉛直軸に対
し対称のものにする場合に比べ長いものにすることが可
能になる。これにより、防振対象とする低周波域での損
失係数のピーク値もよりも高いものにすることが可能に
なり、低周波域の入力振動に対する防振効果を高めるこ
とが可能になる。[0006] In the above configuration, the lower surface of the elastic body constituting the inner upper surface of the main fluid chamber is formed as a guide surface that gradually rises toward the opening of the communication hole on the main fluid chamber side. Bubbles staying or remaining in the liquid rise in the liquid to the guide surface, and then are naturally guided along the guide surface to the main fluid chamber side opening of the communication hole.
Then, the bubbles are guided to the sub-fluid chamber through the communication holes, and the bubbles do not remain in the main fluid chamber. Since the guide surface is formed so as to gradually rise to the opening of the communication hole on the main fluid chamber side, the opening of the orifice on the main fluid chamber side is necessarily lower than the opening of the communication hole on the main fluid chamber side. Will be located. As a result, the length of the passage of the orifice to the sub-fluid chamber can be made longer than in the case where the conventional elastic body is V-shaped and symmetric with respect to the vertical axis. As a result, the peak value of the loss coefficient in the low-frequency region to be damped can be made higher, and the damping effect against input vibration in the low-frequency region can be enhanced.
【０００７】請求項２記載の発明は、請求項１記載の発
明において、オリフィスを主流体室に対し筒軸に直交す
る方向であって水平方向一端側に配置する一方、連通孔
を上記主流体室に対し上記水平方向の他端側位置に開口
するように形成し、弾性体の案内面を上記主流体室の水
平方向一端側位置から他端側位置に向けて徐々に上昇す
る傾斜面として構成するものである。According to a second aspect of the present invention, in the first aspect of the present invention, the orifice is disposed at one end in the horizontal direction in a direction orthogonal to the cylinder axis with respect to the main fluid chamber, and the communication hole is formed in the main fluid chamber. The chamber is formed so as to open at the other end position in the horizontal direction, and the guide surface of the elastic body is an inclined surface that gradually rises from the one end position in the horizontal direction to the other end position of the main fluid chamber. Make up.
【０００８】上記の構成の場合、案内面が主流体したの
一端側から他端側に向けて上昇する傾斜面として構成さ
れているため、請求項１記載の発明による主流体室での
気泡の残留を確実に防止しつつ、オリフィスの通路長を
より長いものにするという作用が具体的に得られること
になる。In the above configuration, since the guide surface is formed as an inclined surface which rises from one end to the other end of the main fluid, air bubbles in the main fluid chamber according to the invention of claim 1 are formed. The effect of making the length of the orifice passage longer while reliably preventing the residue can be obtained.
【０００９】請求項３記載の発明は、請求項１記載の発
明において、オリフィスを主流体室に対し筒軸に直交す
る方向であって水平方向一端側に配置する一方、連通孔
を上記主流体室に対し上記水平方向の他端側位置に開口
するように形成するものである。そして、弾性体を、内
筒体を挟んで上記水平方向一端側に延びる第１主ばね部
と、上記水平方向他端側に延びる第２主ばね部とを備え
るものとし、両主ばね部の各下面により案内面が形成さ
れるように構成する。加えて、上記第１主ばね部の下面
を上記内筒体を通る鉛直軸との間の内角が９０度よりも
小さくなるように設定し、かつ、上記第２主ばね部の下
面を上記鉛直軸との間の内角が９０度よりも大きくなる
ように設定するものである。According to a third aspect of the present invention, in the first aspect of the present invention, the orifice is disposed at one end in the horizontal direction in a direction perpendicular to the cylinder axis with respect to the main fluid chamber, and the communication hole is formed in the main fluid chamber. It is formed so as to open to the chamber at the other end side position in the horizontal direction. The elastic body includes a first main spring portion extending to one end in the horizontal direction with the inner cylindrical body interposed therebetween, and a second main spring portion extending to the other end in the horizontal direction. The guide surface is formed by each lower surface. In addition, the lower surface of the first main spring portion is set so that an inner angle between the lower surface of the first main spring portion and a vertical axis passing through the inner cylinder is smaller than 90 degrees, and the lower surface of the second main spring portion is formed of the vertical surface. The setting is such that the interior angle between the axis and the axis is larger than 90 degrees.
【００１０】上記の構成の場合、第１主ばね部の下面が
鉛直軸に対し９０度よりも小さい内角を有するように内
筒体からオリフィスが配置された水平方向一端側に延
び、第２主ばね部の下面が鉛直軸に対し９０よりも大き
い内角を有するように上記内筒体から連通孔の主流体室
側開口のある水平方向他端側に延びているため、上記水
平方向一端側の主流体室内の気泡が上記第１主ばね部の
下面に沿って導かれ、ついで、上記第２主ばね部の下面
に沿って連通孔の主流体室側開口まで導かれることにな
り、また、上記水平方向他端側の主流体室の気泡は上記
第２主ばね部の下面に沿って上記連通孔まで導かれるこ
とになる。これにより、請求項２記載の発明の場合と同
様にオリフィスの通路長をより長くして低周波域での防
振効果を十分に得ることが可能になる。In the above structure, the lower surface of the first main spring portion extends from the inner cylinder to one end in the horizontal direction where the orifice is arranged so that the lower surface of the first main spring portion has an inner angle smaller than 90 degrees with respect to the vertical axis. Since the lower surface of the spring portion extends from the inner cylinder to the other end in the horizontal direction having the main fluid chamber side opening of the communication hole so that the lower surface of the spring portion has an inner angle larger than 90 with respect to the vertical axis, Bubbles in the main fluid chamber are guided along the lower surface of the first main spring portion, and then guided to the main fluid chamber side opening of the communication hole along the lower surface of the second main spring portion. Bubbles in the main fluid chamber at the other end in the horizontal direction are guided to the communication hole along the lower surface of the second main spring portion. As a result, as in the case of the second aspect of the present invention, it is possible to obtain a sufficient vibration isolation effect in a low frequency range by making the passage length of the orifice longer.
【００１１】また、請求項４記載の発明は、請求項３記
載の発明において、第１及び第２主ばね部を内筒体を挟
んでハの字状に延ばし、かつ、第１主ばね部を、上記内
筒体の筒軸に直交する方向であって水平方向に対する剛
性が第２主ばね部よりも小さくなるよう、内筒体を通る
鉛直軸に対する傾斜が第２主ばね部よりも急になるよう
に上記内筒体から外筒体の側へ延ばす構成とするもので
ある。According to a fourth aspect of the present invention, in the third aspect of the invention, the first and second main spring portions are extended in a C-shape with the inner cylinder interposed therebetween, and the first main spring portion is provided. The inclination with respect to the vertical axis passing through the inner cylinder is steeper than that of the second main spring so that the rigidity in the direction perpendicular to the cylinder axis of the inner cylinder and in the horizontal direction is smaller than that of the second main spring. The structure extends from the inner cylindrical body to the outer cylindrical body side.
【００１２】上記の構成の場合、第１主ばね部が第２主
ばね部よりもより傾斜の強いものとされて水平方向に対
する剛性が第１主ばね部の方が第２主ばね部よりも小さ
くなるようにされているため、上記水平方向の一端側に
入力する外力に対し相対的に軟らかく、他端側に入力す
る外力に対し相対的に硬くそれぞれ支承することが可能
になり、例えば前輪操舵・前輪駆動（ＦＦ）式の横置き
エンジンを支承する場合にそのエンジンのトルク方向に
対し軟らかくしたいという要求をも満足させることが可
能になる。In the case of the above configuration, the first main spring portion has a higher inclination than the second main spring portion, and the rigidity in the horizontal direction is greater in the first main spring portion than in the second main spring portion. Because it is made smaller, it is relatively soft against external force input to one end in the horizontal direction, and relatively hard to external force input to the other end, so that it is possible to support, for example, the front wheel. When a steering / front-wheel drive (FF) type horizontally mounted engine is supported, it is possible to satisfy the demand for softening the torque direction of the engine.
【００１３】さらに、請求項５記載の発明は、請求項
１、請求項２または請求項３のいずれかに記載の発明に
おいて、弾性体を、内筒体及び外筒体の一方が振動発生
源に、他方が振動受部にそれぞれ連結された状態で、上
記弾性体の下面に案内面が形成される構成とするもので
ある。According to a fifth aspect of the present invention, in the first aspect of the present invention, the elastic body is formed of one of an inner cylinder and an outer cylinder. A guide surface is formed on the lower surface of the elastic body in a state where the other is connected to the vibration receiving portion.
【００１４】上記の構成の場合、防振マウントの製造段
階、すなわち、製品単独の場合には、弾性体の下面に案
内面が形成されておらずに上方に凸になるような凹みが
存在して封入した気体が主流体室内にも滞留しているよ
うな場合であっても、振動発生源である例えばエンジン
を支承するように組み付けた状態では、上記弾性体の下
面に案内面が形成されて主流体室内の気体がすべて連通
孔を通して副流体室に自然に集められることになる。こ
の結果、製造時の気体の封入段階において、副流体室に
のみ気体を封入するような工夫を何等することなく、防
振マウントとしての使用時には気体が副流体室にのみ封
入した状態にすることが可能になり、その封入気体によ
ってオリフィスを介した液柱共振を有効に生じさせるこ
とが可能になる。In the case of the above structure, when the vibration isolating mount is manufactured, that is, in the case of the product alone, there is no concave surface which is upwardly convex without a guide surface being formed on the lower surface of the elastic body. Even in the case where the sealed gas remains in the main fluid chamber, a guide surface is formed on the lower surface of the elastic body in a state where the gas is mounted to support, for example, an engine that is a vibration source. Therefore, all the gas in the main fluid chamber is naturally collected in the sub-fluid chamber through the communication hole. As a result, in the gas enclosing stage at the time of manufacture, no measures should be taken to enclose the gas only in the sub-fluid chamber, and the gas should be encased only in the sub-fluid chamber when used as an anti-vibration mount. It is possible to effectively generate liquid column resonance through the orifice by the enclosed gas.
【００１５】[0015]
【発明の実施の形態】以下、本発明の実施形態を図面に
基いて説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１６】図１は本発明の実施形態に係る液体封入式
防振マウントの無負荷状態（製造状態）を示し、図２，
図３及び図４は上記実施形態の内筒体が振動発生源とし
てのエンジンに、外筒体が振動受部としての車体にそれ
ぞれ取付けられてエンジンの自重が内筒体及び弾性体に
作用した状態（１Ｇ状態）を示す。FIG. 1 shows an unloaded state (manufactured state) of a liquid-filled anti-vibration mount according to an embodiment of the present invention.
FIGS. 3 and 4 show that the inner cylinder of the above embodiment is attached to the engine as the vibration source, and the outer cylinder is attached to the vehicle body as the vibration receiver, and the weight of the engine acts on the inner cylinder and the elastic body. The state (1G state) is shown.
【００１７】図１〜図４において、１は筒軸Ｘが略水平
方向となるよう配置された内筒体、２はこの内筒体１の
周囲を囲むよう外周囲に配置された外筒体、３はこの外
筒体２と上記内筒体１とを互いに連結する弾性体、４は
上記内筒体１と外筒体２との中間位置であって上記外筒
体２に近接した位置の弾性体３中に上記内筒体１の周囲
を囲むよう埋め込まれた中間筒体である。また、５は上
記内筒体１の下側の弾性体３内に画成された主流体室、
６は上記内筒体１の上側に画成された副流体室、７は上
記の主流体室５と副流体室６を互いに連通するオリフィ
ス、８は同じく主流体室５と副流体室とを互いに連通す
る連通孔、９は上記内筒体１よりも上側の弾性体３中を
上記筒軸Ｘに平行に貫通する貫通空所、１０は上記主流
体室５に臨んで外筒体２の内周面側に装着された嵌め込
み部材である。そして、上記主流体室５および副流体室
６には非圧縮性の流体としての液体１１と、圧縮性の気
体としての空気１２とが封入されている。1 to 4, reference numeral 1 denotes an inner cylinder disposed so that a cylinder axis X is substantially in a horizontal direction, and 2 denotes an outer cylinder disposed around the inner cylinder 1 so as to surround the inner cylinder 1. Reference numeral 3 denotes an elastic body that connects the outer cylinder 2 and the inner cylinder 1 to each other. Reference numeral 3 denotes an intermediate position between the inner cylinder 1 and the outer cylinder 2 and a position close to the outer cylinder 2. Is an intermediate cylindrical body embedded in the elastic body 3 so as to surround the inner cylindrical body 1. 5 is a main fluid chamber defined in the lower elastic body 3 of the inner cylinder 1,
Reference numeral 6 denotes a sub-fluid chamber defined above the inner cylinder 1, reference numeral 7 denotes an orifice which connects the main fluid chamber 5 and the sub-fluid chamber 6, and reference numeral 8 denotes a main fluid chamber 5 and a sub-fluid chamber. The communication holes 9 communicate with each other. The through holes 9 penetrate the elastic body 3 above the inner cylinder 1 in parallel with the cylinder axis X. The communication holes 10 face the main fluid chamber 5 and are formed in the outer cylinder 2. It is a fitting member mounted on the inner peripheral surface side. The main fluid chamber 5 and the sub fluid chamber 6 are filled with a liquid 11 as an incompressible fluid and an air 12 as a compressible gas.
【００１８】上記内筒体１は、無負荷状態（図１参照）
では、その筒軸Ｘが外筒体２の筒軸Ｙよりも所定寸法上
方位置であって上記筒軸Ｙと平行に延びるように弾性体
３によって外筒体２に対し支持されている。また、上記
中間筒体４には、図５にも示すように、外周面の下側部
分が切り欠かれて窓部４１が形成される一方、上側部分
が内方に凹まされて凹溝部４２が形成されており、この
凹溝部４２の一部には上方に凸となるリバウンド受部４
３が形成されている。The inner cylinder 1 is in a no-load state (see FIG. 1).
In this embodiment, the cylindrical axis X is supported by the elastic body 3 with respect to the outer cylindrical body 2 so that the cylindrical axis X is located at a position above the cylindrical axis Y of the outer cylindrical body 2 by a predetermined dimension and extends in parallel with the cylindrical axis Y. Also, as shown in FIG. 5, the lower portion of the outer peripheral surface of the intermediate cylindrical body 4 is cut out to form a window portion 41, while the upper portion is inwardly recessed to form a concave groove portion 42. Is formed, and a part of the concave groove portion 42 is a rebound receiving portion 4 which is convex upward.
3 are formed.
【００１９】そして、上記弾性体３は、上記内筒体１及
び中間筒体４と一体に加硫成形されたものであり、内筒
体１から筒軸Ｘに直交する水平方向（図１及び図２の左
右方向）両側にハの字状に延びて内筒体１を外筒体２に
対し弾性支持して防振機能を果たす第１及び第２の主ば
ね部３１，３２を主要構成要素として備えるものであ
る。加えて、上記弾性体３は上記内筒体１の下側を所定
肉厚で覆う入力側被覆部３３と、上記内筒体１の上側を
所定肉厚で覆うリバウンド側被覆部３４と、中間筒体４
の外周面を覆うように加硫接着されて外筒体２の内周面
との間に介装される薄肉層３５とを上記両主ばね部３
１，３２と一体のものとして備えている。The elastic body 3 is formed integrally with the inner cylinder 1 and the intermediate cylinder 4 by vulcanization molding, and extends from the inner cylinder 1 in a horizontal direction orthogonal to the cylinder axis X (see FIGS. 1 and 2). The main configuration includes first and second main spring portions 31 and 32 which extend in a C-shape on both sides and elastically support the inner cylindrical body 1 with respect to the outer cylindrical body 2 to perform an anti-vibration function. It is provided as an element. In addition, the elastic body 3 includes an input-side covering portion 33 that covers the lower side of the inner cylinder 1 with a predetermined thickness, a rebound-side covering portion 34 that covers the upper side of the inner cylinder 1 with a predetermined thickness, and an intermediate portion. Cylinder 4
The thin layer 35, which is vulcanized and adhered so as to cover the outer peripheral surface of
1, 32 are provided as one.
【００２０】上記第１主ばね部３１は上記内筒体１から
左斜め下方に比較的急傾斜の下り勾配で外筒体２まで延
びるように形成され、また、上記第２主ばね部３２は上
記内筒体１から右斜め下方に比較的緩傾斜の下り勾配で
外筒体２まで延びるように形成されている。このような
第１及び第２主ばね部３１，３２は、１Ｇ状態（図２参
照）で弾性体３の下面が後述の案内面１３を構成するこ
とになるように定められ、具体的には無負荷状態（図１
参照）で筒軸Ｘを通る鉛直軸Ｚと上記第１主ばね部３１
の延びる方向（図１の一点鎖線参照）との間の内角が、
上記鉛直軸Ｚと第２主ばね部３２の延びる方向との間の
内角よりも所定量小さくなるように定められる。そし
て、１Ｇ状態（図２参照）では、弾性体３がエンジン自
重を受けて下方に撓むことにより、上記鉛直軸Ｚと第１
主ばね部３１の延びる方向との間の内角が９０度よりも
小さくなる一方、第２主ばね部３２の延びる方向との間
の内角が９０度以上（図例ではほぼ９０度）になるよう
になっている。その結果、その弾性体３の下面が主流体
室５の上記水平方向左端側から連通孔８の主流体室側開
口８ａが位置する右端側に向けて徐々に上昇するように
傾斜した案内面１３を構成するようになっている。The first main spring portion 31 is formed so as to extend from the inner cylindrical body 1 to the outer cylindrical body 2 at a relatively steep downward slope diagonally to the left and to the lower left. It is formed so as to extend from the inner cylinder 1 to the outer cylinder 2 obliquely downward to the right with a relatively gentle downward slope. The first and second main spring portions 31 and 32 are determined so that the lower surface of the elastic body 3 constitutes a guide surface 13 described later in a 1G state (see FIG. 2). No load condition (Fig. 1
) And the first main spring portion 31
The inner angle with the direction in which
It is determined so as to be smaller by a predetermined amount than the internal angle between the vertical axis Z and the direction in which the second main spring portion 32 extends. Then, in the 1G state (see FIG. 2), the elastic body 3 is bent downward under the own weight of the engine, so that the vertical axis Z and the first
The internal angle between the main spring portion 31 and the extending direction is smaller than 90 degrees, while the internal angle between the second main spring portion 32 and the extending direction is 90 degrees or more (approximately 90 degrees in the illustrated example). It has become. As a result, the guide surface 13 is inclined such that the lower surface of the elastic body 3 gradually rises from the left end in the horizontal direction of the main fluid chamber 5 to the right end where the main fluid chamber side opening 8a of the communication hole 8 is located. Is configured.
【００２１】また、上記のリバウンド側被覆部３４は、
無負荷状態（図１参照）において中間筒体４のリバウン
ド受部４３の下面に対し非接着状態で当接した状態に形
成されて、内筒体１の両側に筒軸Ｘに平行に貫通する貫
通空所９１，９２が形成されるようになって一方、１Ｇ
状態（図２参照）においては上記リバウンド側被覆部３
４がリバウンド受部４３から離れて両貫通空所９１，９
２が連続した１つの貫通空所９が形成されるようになっ
ている。この１Ｇ状態では、振動入力時に上記被覆部３
４がリバウンド受部４３に当接することにより内筒体１
の上方変位を所定量に制限するようになっている。In addition, the above-mentioned rebound side covering portion 34
In a no-load state (see FIG. 1), the intermediate cylinder 4 is formed in a non-adhered state in contact with the lower surface of the rebound receiving portion 43 of the intermediate cylinder 4, and penetrates both sides of the inner cylinder 1 in parallel with the cylinder axis X. While the through-holes 91 and 92 are formed, 1G
In the state (see FIG. 2), the rebound side coating portion 3
4 is separated from the rebound receiving portion 43 and the two through holes 91, 9
One through space 9 in which two are continuous is formed. In the 1G state, the cover 3
4 comes into contact with the rebound receiving portion 43 so that the inner cylinder 1
Is limited to a predetermined amount.
【００２２】上記主流体室５は上記弾性体３の下面と、
中間筒体４の窓部４１位置に外筒体２の内周面に沿って
嵌め込まれた嵌め込み部材１０とによって画成されてい
る。この嵌め込み部材１０には、上記内筒体１の側に突
出するストッパー部と、外周面側に周方向に延びる凹溝
とが例えば合成樹脂により一体に形成されている。上記
ストッパー部は内筒体１の下側の入力側被覆部３３と当
接することにより内筒体１の下方変位を所定量に制限す
るようになっており、また、上記凹溝は外筒体２の内周
面との間にオリフィス７の延長オリフィス部７２を形成
するようになっている。また、上記副流体室６は、中間
筒体４の凹溝部４２の筒壁と外筒体２の内周面とにより
体積が不変の状態で画成されており、上記凹溝部４２の
筒壁により上記貫通空所９と副流体室６との間が互いに
隔てられて区画されている。The main fluid chamber 5 has a lower surface of the elastic body 3 and
The fitting member 10 is fitted into the position of the window 41 of the intermediate tubular body 4 along the inner peripheral surface of the outer tubular body 2. The fitting member 10 is integrally formed with a stopper projecting toward the inner cylinder 1 and a concave groove extending in the circumferential direction on the outer peripheral surface side, for example, by a synthetic resin. The stopper portion is configured to limit the downward displacement of the inner cylinder 1 to a predetermined amount by contacting the lower input-side covering portion 33 of the inner cylinder 1. An extended orifice portion 72 of the orifice 7 is formed between the inner peripheral surface 2 and the inner peripheral surface of the orifice 7. The sub-fluid chamber 6 is defined by the cylindrical wall of the concave groove 42 of the intermediate cylindrical body 4 and the inner peripheral surface of the outer cylindrical body 2 in a state where the volume does not change. Thus, the through space 9 and the sub-fluid chamber 6 are separated from each other.
【００２３】上記オリフィス７は、内筒体１を挟んで左
側の薄肉層３５（図４及び図６参照）の主流体室５と副
流体室６との間の部分が筒軸Ｘ方向に所定幅だけ周方向
に切り欠かれて凹溝状とされ、この凹溝の部分と外筒体
２の内周面とに挟まれて形成されたオリフィス部７１
と、このオリフィス部７１に密着状態で連通する上記延
長オリフィス部７２とにより形成されている。そして、
このオリフィス７は、第１主ばね部３１の外筒体２との
連結位置が比較的下位に設定され、かつ、上記延長オリ
フィス部７２が負荷されていることにより、比較的大通
路長Ｌ1 を有するように形成されており、また、所定の
低周波域（例えば自動車のシェイク振動域１０〜１５Ｈ
z ）で液柱共振を生じるように上記通路長Ｌ1 に応じて
比較的大通路断面積Ａ1 を有するように形成されてい
る。また、上記オリフィス７は、上記延長オリフィス部
７２の一端開口で主流体室５の右端部側に連通し、その
一端開口が上記オリフィス７の主流体室側開口７ａとさ
れている。The orifice 7 is provided such that a portion between the main fluid chamber 5 and the sub-fluid chamber 6 of the thin layer 35 on the left side of the inner cylinder 1 (see FIGS. 4 and 6) is defined in the cylinder axis X direction. An orifice portion 71 formed by notching in the circumferential direction by a width to form a concave groove, and being sandwiched between the concave groove portion and the inner peripheral surface of the outer cylindrical body 2.
And the extended orifice portion 72, which is in close contact with the orifice portion 71. And
The orifice 7 has a relatively large passage length L1 because the connecting position of the first main spring portion 31 with the outer cylinder 2 is set relatively lower and the extension orifice portion 72 is loaded. And a predetermined low-frequency range (for example, a vehicle shake vibration range of 10 to 15H).
It is formed to have a relatively large passage cross-sectional area A1 in accordance with the passage length L1 so as to cause liquid column resonance in z). The orifice 7 communicates with the right end side of the main fluid chamber 5 at one end opening of the extension orifice portion 72, and the one end opening is the main fluid chamber side opening 7a of the orifice 7.
【００２４】また、連通孔８は、内筒体１を挟んで右側
の薄肉層３５の主流体室５と副流体室６との間の部分が
筒軸Ｘ方向に所定幅だけ周方向に切り欠かれて凹溝状と
され、この凹溝の部分と外筒体２の内周面とに挟まれて
形成されている。この連通孔８は、上記オリフィス７に
設定された共振周波数と関係で定まる細径のものに形成
されており、これにより、このオリフィス７での防振対
象である低周波域の振動入力に対し上記連通孔８を介し
た主流体室５と副流体室６との間の液体１１の流動が実
質的に阻止されようになっている。すなわち、連通孔８
の通路断面積をＡ2 、通路長をＬ2 とした場合に、 （Ａ1 ／Ｌ1 ）＞（Ａ2 ／Ｌ2 ） となるように設定されている。The communication hole 8 is formed by cutting a portion of the thin layer 35 on the right side of the inner cylinder 1 between the main fluid chamber 5 and the sub-fluid chamber 6 by a predetermined width in the cylinder axis X direction. It is chipped and formed into a groove shape, and is formed so as to be sandwiched between the portion of the groove and the inner peripheral surface of the outer cylinder 2. The communication hole 8 is formed to have a small diameter determined in relation to the resonance frequency set in the orifice 7. The flow of the liquid 11 between the main fluid chamber 5 and the sub-fluid chamber 6 through the communication hole 8 is substantially prevented. That is, the communication hole 8
Is set such that (A1 / L1)> (A2 / L2), where A2 is the cross-sectional area of the passage and L2 is the passage length.
【００２５】そして、１Ｇ状態（図２参照）において、
主流体室５内の全てに液体１１が充満され、副流体室６
内に液面１１ａがその副流体室６の上下方向中間位置で
あって上記オリフィス７及び連通孔８の副流体室側開口
７ｂ，８ｂよりも上方に位置するように液体が封入さ
れ、これにより、上記副流体室６の下半部には液室部６
１が形成される一方、上半部には気室部６２が形成され
るようになっている。なお、この気室部６２の容積、す
なわち、封入空気量は、オリフィス７を介しての主流体
室５と副流体室６との間の液体１１の流動により上記液
室部６１の容積を拡縮させて有効に液柱共振を生じさせ
るような量に設定されている。Then, in the 1G state (see FIG. 2),
The whole of the main fluid chamber 5 is filled with the liquid 11, and the sub-fluid chamber 6 is filled.
The liquid is sealed therein such that the liquid surface 11a is located at an intermediate position in the vertical direction of the sub-fluid chamber 6 and above the orifice 7 and the sub-fluid chamber side openings 7b, 8b of the communication hole 8. In the lower half of the auxiliary fluid chamber 6, a liquid chamber 6
1, while an air chamber 62 is formed in the upper half. The volume of the air chamber 62, that is, the amount of enclosed air, is increased or reduced by the flow of the liquid 11 between the main fluid chamber 5 and the sub-fluid chamber 6 through the orifice 7. The amount is set so as to effectively generate liquid column resonance.
【００２６】次に、上記構成の液体封入式防振マウント
の製造方法について説明すると、まず、内筒体１および
中間筒体４とを上述のごとく弾性体３と一体加硫成形す
る。ついで、この一体成形物に嵌め込み部材１０を組み
合わせ、これらと外筒体２とを筒軸Ｘが上下方向になる
ように配置し、上記外筒体２の内周面に対して上から上
記一体成形物の外周面の薄肉層３５と嵌め込み部材１０
とを圧入していく。そして、主流体室５となる空所の上
端部と外筒体２の上端開口縁との間に隙間を開けた状態
で上記圧入を一時停止し、この状態で、上記隙間から液
体１１を気室部６２の空気量を考慮した所定量だけ注入
し、その後、上記一体成形物と嵌め込み部材１０とを最
後まで圧入する。最後に、上記外筒体２の上下の各開口
縁をかしめて上記一体成形物と外筒体２とを一体化す
る。この製造方法によれば、液体１１を満たした液槽中
で組み付けを行う必要がないため、圧入による液体の飛
散の発生や組み付け後に外面に付着した液体の洗浄の必
要などを省略することができる。Next, a description will be given of a method of manufacturing the liquid-filled anti-vibration mount having the above configuration. First, the inner cylinder 1 and the intermediate cylinder 4 are integrally vulcanized with the elastic body 3 as described above. Then, the fitting member 10 is combined with the integrally formed article, and these and the outer cylinder 2 are arranged so that the cylinder axis X is in the vertical direction. Thin layer 35 on outer peripheral surface of molded product and fitting member 10
And press-fit. Then, the press-fitting is temporarily stopped in a state where a gap is opened between the upper end portion of the space serving as the main fluid chamber 5 and the upper end opening edge of the outer cylindrical body 2, and in this state, the liquid 11 is vaporized from the gap. A predetermined amount is injected in consideration of the amount of air in the chamber portion 62, and then the above-mentioned integrally molded product and the fitting member 10 are press-fitted to the end. Finally, the upper and lower opening edges of the outer cylinder 2 are caulked to integrate the integrally formed product with the outer cylinder 2. According to this manufacturing method, since it is not necessary to perform the assembling in the liquid tank filled with the liquid 11, it is possible to omit the occurrence of the scattering of the liquid by press-fitting and the necessity of washing the liquid attached to the outer surface after the assembling. .
【００２７】この製造された防振マウントを上記筒軸Ｘ
が水平になるようして主流体室５が下に副流体室６が上
になるようにすれば、図１に示す無負荷状態になり、封
入された空気１２は、通常は、副流体室６の上部と、主
流体室５の連通孔８の主流体室側開口８ａを通る水平面
よりも上方部分とにそれぞれ位置することになる。The manufactured anti-vibration mount is mounted on the cylindrical shaft X
When the main fluid chamber 5 is set downward and the sub-fluid chamber 6 is set up so that the main fluid chamber 5 becomes horizontal, the no-load state shown in FIG. 1 is obtained, and the enclosed air 12 is usually supplied to the sub-fluid chamber. 6 and a portion above a horizontal plane passing through the opening 8a on the main fluid chamber side of the communication hole 8 of the main fluid chamber 5 respectively.
【００２８】そして、この無負荷状態の防振マウントの
内筒体１をエンジン側に、外筒体２を車体側にそれぞれ
取付けて１Ｇ状態にすることにより、弾性体３が下方に
変位してその弾性体３の下面に案内面１３（図２参照）
が形成されるため、上記主流体室５内の空気１２が上記
案内面１３に沿って連通孔８の主流体室側開口８ａに自
然に導かれ、この連通孔８を通して全量が副流体室６に
入る。これにより、空気１２が副流体室６にのみ封入さ
れた状態に自動的にされ，副流体室６内に確実に所定の
設定空気量（設定容積）の気室部６２が形成される。The elastic body 3 is displaced downward by attaching the inner cylinder 1 of the anti-vibration mount in the no-load state to the engine side and the outer cylinder 2 to the vehicle body side to form a 1G state. A guide surface 13 (see FIG. 2) is provided on the lower surface of the elastic body 3.
Is formed, the air 12 in the main fluid chamber 5 is naturally guided to the main fluid chamber side opening 8a of the communication hole 8 along the guide surface 13, and the total amount of the auxiliary fluid chamber 6 passes through the communication hole 8. to go into. As a result, the state in which the air 12 is sealed only in the sub-fluid chamber 6 is automatically set, and the air chamber 62 having a predetermined set air amount (set volume) is reliably formed in the sub-fluid chamber 6.
【００２９】次に、内筒体１を介して弾性体３に対し上
下方向の低周波域の振動が入力すると、内筒体１が上下
方向に相対的に変位する。この変位によりオリフィス７
を通して主流体室５と副流体室６の液室部６１との間で
液体１１が流動する。この際、連通孔８は液体１１が実
質的に流通しない状態になるため、上記低周波域の振動
入力によりオリフィス７を介した液体１１の流動を有効
に生じさせることができ、そのオリフィス７を介した液
柱共振によって上記低周波域の入力振動の減衰が図られ
る。なお、上記のオリフィス７を介した液体１１の流動
は気室部６２の空気１２の圧縮・膨脹作用によって液室
部６１の容積の拡縮により可能となるものである。Next, when vibrations in a low frequency range in the vertical direction are input to the elastic body 3 through the internal cylinder 1, the internal cylinder 1 is relatively displaced in the vertical direction. This displacement causes orifice 7
The liquid 11 flows between the main fluid chamber 5 and the liquid chamber portion 61 of the sub-fluid chamber 6 through the liquid. At this time, since the communication hole 8 is in a state in which the liquid 11 does not substantially flow, the flow of the liquid 11 through the orifice 7 can be effectively generated by the vibration input in the low frequency range, and the orifice 7 is The input vibration in the low frequency range is attenuated by the liquid column resonance via the liquid column. The flow of the liquid 11 through the orifice 7 is made possible by the expansion and contraction of the volume of the liquid chamber 61 by the action of compressing and expanding the air 12 in the air chamber 62.
【００３０】上記オリフィス７の液柱共振による防振に
おいて、第１主ばね部３１が第２主ばね部３２よりも急
角度で外筒体２の側に延びているため、本来のオリフィ
ス部７１の通路長を、通常の第１及び第２主ばね部が鉛
直軸に対し対象に配置された場合と比べ、より長いもの
にすることができる上、嵌め込み部材１０の延長オリフ
ィス部７２の負荷によりオリフィス７の通路長を飛躍的
に長いものにすることができる。このため、同じ低周波
域で液柱共振が生じるように上記オリフィス７よりも小
通路長及び小通路断面積に設定（通路断面積に対する通
路長の比率を同じに設定）したオリフィスと比べ、損失
係数のピーク値をより高いものにすることができ、これ
により、より高い防振効果を得ることができる。In the vibration isolation of the orifice 7 due to the liquid column resonance, the first main spring portion 31 extends toward the outer cylinder 2 at a steeper angle than the second main spring portion 32. Can be made longer than when the normal first and second main spring portions are symmetrically disposed with respect to the vertical axis, and the load of the extension orifice portion 72 of the fitting member 10 can be increased. The passage length of the orifice 7 can be significantly increased. For this reason, compared with the orifice in which the orifice 7 is set to have a smaller passage length and a smaller passage cross-sectional area (the ratio of the passage length to the passage cross-sectional area is set to be the same) so that the liquid column resonance occurs in the same low frequency region. The peak value of the coefficient can be made higher, so that a higher anti-vibration effect can be obtained.
【００３１】また、第２主ばね部３２が略水平方向に延
び、第１主ばね部３１が斜め下方に、すなわち、第２主
ばね部３２よりも急角度で斜めに延びているため、内筒
体１に水平方向左側に入力する振動や衝撃に対し相対的
に軟らかく支持し、水平方向右側に入力する振動や衝撃
に対し相対的に硬く支持するという特性を実現させるこ
とができる。このため、例えばエンジンを横置き配置に
したＦＦ型車両のエンジンを支承するために本防振マウ
ントを図２の矢印Ｐが車両の前後方向となるように配置
することにより、エンジンのアイドル振動や、ニュート
ラルから前進側もしくは後進側への変速操作に伴う変速
ショックが図２の矢印Ｔで示すトルク方向に入力して
も、その変速ショックを比較的軟らかく支持して乗員に
与えるショックを低減させることができる。The second main spring portion 32 extends substantially in the horizontal direction, and the first main spring portion 31 extends obliquely downward, that is, obliquely at a steeper angle than the second main spring portion 32. It is possible to realize such a characteristic that the cylinder 1 is relatively softly supported against vibrations and shocks input to the left side in the horizontal direction, and relatively hardly supported against vibrations and shocks input to the right side in the horizontal direction. For this reason, for example, by arranging the anti-vibration mount so that the arrow P in FIG. Even if a shift shock accompanying a shift operation from the neutral to the forward side or the reverse side is input in the torque direction shown by the arrow T in FIG. 2, the shift shock is relatively softly supported to reduce the shock given to the occupant. Can be.
【００３２】さらに、振動の入力に伴い副流体室６の気
室部６２の空気１２が乱され、その空気１２が気泡とな
って液体１１に混入し、その気泡がオリフィス７を介し
た液体１１の流動に伴い主流体室５内に入り込んでしま
っても、その気泡は弾性体３の下面の案内面１３に導か
れ、ついで、連通孔８を通して副流体室６に自然に戻さ
れることになるため、主流体室５内に気泡が滞留もしく
は残留することを確実に防止することができる。これに
より、振動入力に対し気室部６２の容積を常に所定量に
維持した状態で所期の防振機能を果たすことができるよ
うになる。Further, the air 12 in the air chamber portion 62 of the sub-fluid chamber 6 is disturbed by the input of the vibration, and the air 12 becomes air bubbles and mixes with the liquid 11, and the air bubbles form the liquid 11 through the orifice 7. Even if the air bubbles enter the main fluid chamber 5 with the flow of the air, the air bubbles are guided to the guide surface 13 on the lower surface of the elastic body 3 and then naturally returned to the sub-fluid chamber 6 through the communication hole 8. Therefore, it is possible to reliably prevent bubbles from remaining or remaining in the main fluid chamber 5. Thus, the desired vibration damping function can be achieved in a state where the volume of the air chamber 62 is always maintained at a predetermined amount with respect to the vibration input.
【００３３】加えて、上記振動入力の際、弾性体３の上
側に貫通空所９が存在するため、入力振動が大振幅のも
のであっても、上記弾性体３は引張応力が過度に大きく
なることなしに大変位することができ、エンジンマウン
トとしてその機能を十分に発揮することができる。ま
た、上記の大振幅の振動が入力して副流体室６の内圧が
増大しても、上記副流体室６が中間筒体４の一部である
ほぼ剛体に近い凹溝部４２の筒壁と外筒体２とによって
画成されているため、上記副流体室６を画成する部材
（凹溝部４２，外筒体２）の強度を、ゴム薄膜などの弾
性膜部材により画成する場合と比べ、飛躍的に増強させ
ることができ、上記内圧による破損のおそれを回避する
ことができる。このため、ブッシュタイプの防振マウン
トにおいて、貫通空所９を支障なく設けることができ
る。In addition, at the time of the vibration input, the through-hole 9 exists above the elastic body 3, so that the elastic body 3 has an excessively large tensile stress even if the input vibration has a large amplitude. Large displacement can be achieved without becoming, and the function can be fully exhibited as an engine mount. Even if the large-amplitude vibration is input and the internal pressure of the sub-fluid chamber 6 increases, the sub-fluid chamber 6 is in contact with the cylinder wall of the substantially grooved concave groove 42 which is a part of the intermediate cylinder 4. The strength of the member (concave groove 42, outer cylinder 2) that defines the sub-fluid chamber 6 is defined by the elastic film member such as a rubber thin film. In comparison, it is possible to remarkably increase the strength, and to avoid the possibility of breakage due to the internal pressure. Therefore, in the bush type anti-vibration mount, the through space 9 can be provided without any trouble.
【００３４】＜他の実施形態＞なお、本発明は上記実施
形態に限定されるものではなく、その他種々の実施形態
を包含するものである。すなわち、上記実施形態では、
副流体室６の画成を左右方向に延びる凹溝部４２を形成
することにより行っているが、これに限らず、例えば窪
み状に構成してもよい。<Other Embodiments> The present invention is not limited to the above-described embodiments, but includes various other embodiments. That is, in the above embodiment,
The sub-fluid chamber 6 is defined by forming the concave groove 42 extending in the left-right direction. However, the invention is not limited to this.
【００３５】また、上記実施形態では、副流体室５に封
入する気体として空気１２を用いたが、これに限らず、
気体の膨脹・圧縮作用によりオリフィス７を介して主流
体室５と副流体室６との間の液体１１の流動を可能とす
るものならばいずれを採用してもよく、例えば窒素ガス
などを用いてもよい。In the above embodiment, the air 12 is used as the gas to be filled in the sub-fluid chamber 5, but the present invention is not limited to this.
Any one that allows the flow of the liquid 11 between the main fluid chamber 5 and the sub-fluid chamber 6 through the orifice 7 by the expansion and compression action of gas may be used. For example, nitrogen gas or the like may be used. You may.
【００３６】さらに、上記実施形態では、嵌め込み部材
１０を設けてその延長オリフィス部７２によりオリフィ
ス７の通路長をより一層長いものにするようにしている
が、これに限らず、上記嵌め込み部材１０を省略しても
よい。この場合であっても、第１主ばね部３１が第２主
ばね部３２よりも急傾斜で延びているため、オリフィス
の主流体室側開口はより下方位置となってオリフィスの
通路長の長大化が図られ、低周波域で損失係数ピーク値
をより高いものにすることができる。Further, in the above-described embodiment, the fitting member 10 is provided and the passage length of the orifice 7 is made longer by the extension orifice portion 72. However, the present invention is not limited to this. It may be omitted. Even in this case, since the first main spring portion 31 extends at a steeper slope than the second main spring portion 32, the opening of the orifice on the main fluid chamber side is located at a lower position and the passage length of the orifice is longer. And the peak value of the loss coefficient can be made higher in the low frequency range.
【００３７】[0037]
【発明の効果】以上説明したように、請求項１記載の発
明における液体封入式防振マウントによれば、主流体室
に気泡が残留することを確実に防止しつつ、主流体室と
副流体室とを連通するオリフィスの通路長もより長いも
のにして防振対象とする低周波域での損失係数のピーク
値もよりも高いものにすることが可能になり、低周波域
の入力振動に対する防振効果をより一層高めることがで
きるようになる。As described above, according to the liquid-filled anti-vibration mount of the first aspect of the present invention, the main fluid chamber and the sub-fluid are reliably prevented from remaining in the main fluid chamber. It is possible to make the passage length of the orifice communicating with the chamber longer, and to make the peak value of the loss coefficient in the low frequency range to be vibration-isolated higher, so that the input vibration in the low frequency range The vibration-proof effect can be further enhanced.
【００３８】請求項２または請求項３記載の発明によれ
ば、請求項１記載の発明による主流体室での気泡の残留
を確実に防止しつつ、オリフィスの通路長をより長いも
のにすることを具体的に得ることができる。According to the second or third aspect of the invention, the passage length of the orifice is made longer while reliably preventing bubbles from remaining in the main fluid chamber according to the first aspect of the invention. Can be specifically obtained.
【００３９】また、請求項４記載の発明によれば、請求
項３記載の発明による効果に加え、内筒体を介して水平
方向一端側に入力する外力に対し相対的に軟らかく、他
端側に入力する外力に対し相対的に硬くそれぞれ支承す
ることができ、例えば前輪操舵・前輪駆動（ＦＦ）式の
横置きエンジンを支承する場合にそのエンジンのトルク
方向に対し軟らかく支承したいという要求をも満足させ
ることができるようになる。According to the invention of claim 4, in addition to the effect of the invention of claim 3, in addition to the external force inputted to one end in the horizontal direction via the inner cylinder, it is relatively soft and the other end Can be supported relatively hard to an external force input to the vehicle. For example, when a front-wheel-steering / front-wheel drive (FF) type horizontal engine is supported, there is also a demand that the engine be softly supported in the torque direction of the engine. You will be able to satisfy.
【００４０】さらに、請求項５記載の発明によれば、請
求項１、請求項２または請求項３のいずれかに記載の発
明による効果に加え、振動発生源である例えばエンジン
を支承するように組み付けた状態では、弾性体の下面に
形成された案内面により主流体室内の気体がすべて連通
孔を通して副流体室に自然に集められることになるた
め、製造時の気体の封入段階において副流体室にのみ気
体を封入するような工夫を何等することなく、防振マウ
ントとしての使用時には気体が副流体室にのみ封入した
状態にすることができ、その封入気体によってオリフィ
スを介した液柱共振を有効に生じさせて所期の防振効果
を得ることができる。According to the fifth aspect of the present invention, in addition to the effects of the first, second, or third aspect of the present invention, a vibration source such as an engine is supported. In the assembled state, all the gas in the main fluid chamber is naturally collected in the sub-fluid chamber through the communication hole by the guide surface formed on the lower surface of the elastic body. The gas can be sealed only in the sub-fluid chamber when used as an anti-vibration mount without taking any measures to enclose the gas only in the sub-fluid chamber. It is possible to obtain the desired anti-vibration effect effectively.
【図１】本発明の実施形態の製造段階のものを示す横断
面図である。FIG. 1 is a cross-sectional view showing a manufacturing stage of an embodiment of the present invention.
【図２】上記実施形態の１Ｇ状態のものを示す図１対応
図である。FIG. 2 is a view corresponding to FIG. 1, showing a 1G state of the embodiment.
【図３】図２のＡ−Ａ線における断面図である。FIG. 3 is a cross-sectional view taken along line AA of FIG.
【図４】図２のＢ−Ｂ線における断面図である。FIG. 4 is a sectional view taken along line BB of FIG. 2;
【図５】内筒体と中間筒体との分解斜視図である。FIG. 5 is an exploded perspective view of an inner cylinder and an intermediate cylinder.
【図６】図２のＣ−Ｃ線における展開断面図である。FIG. 6 is a developed sectional view taken along line CC of FIG. 2;
１ 内筒体 ２ 外筒体 ３ 弾性体 ４ 中間筒体 ５ 主流体室 ６ 副流体室 ７ オリフィス ７ａ オリフィスの主流体室側開口 ８ 連通孔 ８ａ 連通孔の主流体室側開口 １１ 液体 １２ 空気 １３ 案内面 DESCRIPTION OF SYMBOLS 1 Inner cylinder 2 Outer cylinder 3 Elastic body 4 Intermediate cylinder 5 Main fluid chamber 6 Subfluid chamber 7 Orifice 7a Opening of orifice in main fluid chamber 8 Communication hole 8a Opening of communication hole in main fluid chamber 11 Liquid 12 Air 13 Guideway
Claims (5)
の内筒体の周囲を囲む外筒体と、この外筒体と上記内筒
体とを互いに連結する弾性体と、上記内筒体の下側位置
の弾性体中に画成された主流体室と、上記内筒体の上側
位置に画成された副流体室と、これら主流体室及び副流
体室に封入された液体及び気体と、上記主流体室と副流
体室とを互いに連通するオリフィスとを備えた液体封入
式防振マウントにおいて、 上記主流体室と副流体室とを互いに連通して気体を上記
副流体室に導く連通孔が上記オリフィスとは別に形成さ
れ、 上記主流体室の内部上面を画成する上記弾性体の下面に
は、上記連通孔の主流体室側開口に向かい徐々に上昇し
て気泡を上記連通孔の主流体室側開口に導く案内面が形
成され、 上記連通孔は、上記オリフィスの共振周波数においてそ
の連通孔を通しての液体の流動が実質的に停止される径
及び長さに設定されていることを特徴とする液体封入式
防振マウント。An inner cylinder having a cylinder axis arranged laterally; an outer cylinder surrounding the inner cylinder; an elastic body connecting the outer cylinder and the inner cylinder to each other; A main fluid chamber defined in the elastic body at a lower position of the inner cylinder, a sub-fluid chamber defined in an upper position of the inner cylinder, and sealed in the main fluid chamber and the sub-fluid chamber. In a liquid-sealed anti-vibration mount including a liquid and a gas, and an orifice communicating the main fluid chamber and the sub-fluid chamber with each other, the main fluid chamber and the sub-fluid chamber are communicated with each other, and the gas is passed through the sub-fluid. A communication hole leading to the chamber is formed separately from the orifice, and a lower surface of the elastic body that defines an inner upper surface of the main fluid chamber gradually rises toward the main fluid chamber side opening of the communication hole to generate bubbles. A guide surface for guiding the communication hole to the main fluid chamber side opening of the communication hole; A liquid-filled anti-vibration mount characterized in that the diameter and the length are set so that the flow of liquid through the communication hole is substantially stopped at the resonance frequency.
て水平方向一端側に配置される一方、連通孔が上記主流
体室に対し上記水平方向の他端側位置に開口するように
形成されており、 弾性体の案内面が上記主流体室の水平方向一端側位置か
ら他端側位置に向けて徐々に上昇する傾斜面として構成
されていることを特徴とする液体封入式防振マウント。2. The main fluid chamber according to claim 1, wherein the orifice is arranged at one end in a horizontal direction in a direction perpendicular to the cylinder axis with respect to the main fluid chamber, and a communication hole is provided in the horizontal direction with respect to the main fluid chamber. The main fluid chamber is formed as an inclined surface that gradually ascends from the one end position in the horizontal direction to the other end position. Features a liquid-filled anti-vibration mount.
て水平方向一端側に配置される一方、連通孔が上記主流
体室に対し上記水平方向の他端側位置に開口するように
形成されており、 弾性体は、内筒体を挟んで上記水平方向一端側に延びる
第１主ばね部と、上記水平方向他端側に延びる第２主ば
ね部とを備え、両主ばね部の各下面により案内面が形成
されるように構成され、 上記第１主ばね部の下面は上記内筒体を通る鉛直軸との
間の内角が９０度よりも小さくなるように設定され、か
つ、上記第２主ばね部の下面は上記鉛直軸との間の内角
が９０度よりも大きくなるように設定されていることを
特徴とする液体封入式防振マウント。3. The main fluid chamber according to claim 1, wherein the orifice is disposed at one end in the horizontal direction in a direction orthogonal to the cylinder axis with respect to the main fluid chamber, and a communication hole is provided in the horizontal direction with respect to the main fluid chamber. The elastic body is formed so as to open at an end side position, and the elastic body includes a first main spring portion extending to one end in the horizontal direction with the inner cylindrical body interposed therebetween, and a second main spring portion extending to the other end in the horizontal direction. And a guide surface is formed by each lower surface of both main spring portions. An inner angle between the lower surface of the first main spring portion and a vertical axis passing through the inner cylindrical body is greater than 90 degrees. A liquid-filled anti-vibration mount characterized in that it is set so as to be smaller, and the lower surface of the second main spring portion is set so that an inner angle with the vertical axis is larger than 90 degrees. .
び、かつ、第１主ばね部は、上記内筒体の筒軸に直交す
る方向であって水平方向に対する剛性が第２主ばね部よ
りも小さくなるよう、内筒体を通る鉛直軸に対する傾斜
が第２主ばね部よりも急になるように上記内筒体から外
筒体の側へ延びていることを特徴とする液体封入式防振
マウント。4. The internal combustion engine according to claim 3, wherein the first and second main spring portions extend in a C-shape across the inner cylinder, and the first main spring portion is orthogonal to a cylinder axis of the inner cylinder. From the inner cylinder to the outer cylinder so that the inclination with respect to the vertical axis passing through the inner cylinder is steeper than that of the second main spring so that the rigidity in the horizontal direction is smaller than that of the second main spring. A liquid-filled anti-vibration mount that extends to the side of the body.
ずれかにおいて、 弾性体は、内筒体及び外筒体の一方が振動発生源に、他
方が振動受部にそれぞれ連結された状態で、上記弾性体
の下面に案内面が形成されるように構成されていること
を特徴とする液体封入式防振マウント。5. The elastic body according to claim 1, wherein one of the inner cylindrical body and the outer cylindrical body is connected to a vibration generating source, and the other is connected to a vibration receiving portion. A liquid-filled anti-vibration mount, wherein a guide surface is formed on a lower surface of the elastic body in a state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6420097A JP3676025B2 (en) | 1997-03-18 | 1997-03-18 | Liquid filled anti-vibration mount |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6420097A JP3676025B2 (en) | 1997-03-18 | 1997-03-18 | Liquid filled anti-vibration mount |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10252812A true JPH10252812A (en) | 1998-09-22 |
| JP3676025B2 JP3676025B2 (en) | 2005-07-27 |
Family
ID=13251199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6420097A Expired - Fee Related JP3676025B2 (en) | 1997-03-18 | 1997-03-18 | Liquid filled anti-vibration mount |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3676025B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008045641A (en) * | 2006-08-11 | 2008-02-28 | Tokai Rubber Ind Ltd | Fluid filled type cylindrical vibration control device |
| JP2009074610A (en) * | 2007-09-20 | 2009-04-09 | Kurashiki Kako Co Ltd | Liquid-sealed vibration control device |
| KR101237928B1 (en) | 2010-09-28 | 2013-02-28 | 현대자동차주식회사 | Three point supporting bush type hydromount |
| KR20130055112A (en) * | 2011-11-18 | 2013-05-28 | 현대자동차주식회사 | Hydraulic transmission mount |
-
1997
- 1997-03-18 JP JP6420097A patent/JP3676025B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008045641A (en) * | 2006-08-11 | 2008-02-28 | Tokai Rubber Ind Ltd | Fluid filled type cylindrical vibration control device |
| JP4697459B2 (en) * | 2006-08-11 | 2011-06-08 | 東海ゴム工業株式会社 | Fluid filled cylindrical vibration isolator |
| JP2009074610A (en) * | 2007-09-20 | 2009-04-09 | Kurashiki Kako Co Ltd | Liquid-sealed vibration control device |
| KR101237928B1 (en) | 2010-09-28 | 2013-02-28 | 현대자동차주식회사 | Three point supporting bush type hydromount |
| US8777192B2 (en) | 2010-09-28 | 2014-07-15 | Hyundai Motor Company | Three point supporting bush type hydromount |
| KR20130055112A (en) * | 2011-11-18 | 2013-05-28 | 현대자동차주식회사 | Hydraulic transmission mount |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3676025B2 (en) | 2005-07-27 |
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