JP3823274B2 - Liquid filled anti-vibration mount - Google Patents

Liquid filled anti-vibration mount Download PDF

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Publication number
JP3823274B2
JP3823274B2 JP14419396A JP14419396A JP3823274B2 JP 3823274 B2 JP3823274 B2 JP 3823274B2 JP 14419396 A JP14419396 A JP 14419396A JP 14419396 A JP14419396 A JP 14419396A JP 3823274 B2 JP3823274 B2 JP 3823274B2
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Japan
Prior art keywords
vibration
metal fitting
partition
base
peripheral edge
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JP14419396A
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Japanese (ja)
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JPH09329180A (en
Inventor
裕 水谷
基男 国広
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Priority to JP14419396A priority Critical patent/JP3823274B2/en
Priority to PCT/JP1996/003719 priority patent/WO2004090372A1/en
Priority to US08/894,114 priority patent/US6032935A/en
Publication of JPH09329180A publication Critical patent/JPH09329180A/en
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Publication of JP3823274B2 publication Critical patent/JP3823274B2/en
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  • Combined Devices Of Dampers And Springs (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、主に自動車エンジン等の振動発生体を防振的に支承するのに用いられる液封入式防振マウントに関するものである。
【0002】
【従来の技術および発明が解決しようとする課題】
自動車エンジン等の振動発生体を、その振動を車体へ伝達させないように支承する液封入式の防振マウントとしては、従来より種々の構造のものが提案されている。
【0003】
例えば図3に示すように、筒状金具(52)と取付金具(59)とをゴム弾性体からなる防振基体(53)により結合するとともに、筒状金具(52)における前記防振基体と対向する開口端側にゴム膜からなるダイヤフラム(54)とその内側に位置する仕切り体(55)をシール状態に固着し、防振基体(53)とダイヤフラム(54)の間の内室を2つの液室(57)(58)に仕切り構成し、両液室(57)(58)を仕切り体(55)に設けたオリフィス通路(56)により連通させ、オリフィス通路による液流動効果や防振基体の防振効果により、振動減衰機能と振動絶縁機能を果すように構成した二室形の液封入式防振マウントがある。(51)は筒状金具(52)を抱持する筒状の本体金具であり、この本体金具(51)が前記の筒状金具と一体に形成されることもある。
【0004】
このような構造の防振マウントを自動車のエンジンを支承するのに使用した場合、通常、上側の取付金具(59)をエンジン側のブラケットに締結して用いられる。
【0005】
この使用において、防振基体(53)はエンジン等の荷重を受けて撓むことになるが、この防振基体(53)が前記のように筒状金具(52)に固着されて仕切り体(55)との間に所要の間隔を存して設けられていると、防振基体(53)は筒状金具(52)の内方部全体で撓み変形することになる。
【0006】
したがって前記荷重を受けたときの撓み量が大きくなり、またそれだけ撓み変形による防振基体(53)のクリープ量も大きくなって、充分な耐久性が得られないといった問題がある。
【0007】
また、この種の防振マウントは、エンジン等の振動によって上下に大きく変位するのを規制するために、上側の取付金具(59)と、車体フレーム側に固定される本体金具(51)とに、振動による変位量が大きいときに当接するストッパーが設けられる。
【0008】
例えば、図3の場合、上側の取付金具(59)の一部に、防振基体(53)と一体のゴム層で包被した突出部(59a)を設けるとともに、本体金具(51)の上方への延長部の内側端部(51a)を、振動による上方への変位量が大きいときに前記突出部(59a)が弾力的に当接する(通常時はクリアランスを保有)ストッパーとして形成し、これによってそれ以上の変位を抑止するようになっている。
【0009】
通常、このような防振マウントにおいては、防振基体の静バネ定数に応じて略一定の荷重に対して略一定のストッパークリアランスを保有するように設定されるが、自動車エンジン等を複数のマウントで支承した場合、その使用個所によって分担荷重が異なり、この分担荷重の不均一のために、マウント毎のストッパークリアランスも不均一になり、打音の発生に繋がるといった問題がある。
【0010】
そうかといって、防振基体を構成するゴム弾性体自体の静バネ定数を上げるのは、動的バネ定数も上がることになり、バネ特性が大きく変化して、予定する振動防止効果が得られなくなり好ましくない。
【0011】
本発明は、上記に鑑みてなしたものであり、動的バネ定数を上げることなく静バネ定数を上げることができ、防振基体の撓み変形、特に下向きの撓み変形を小さくして、撓み変形によるクリープ量を小さくし耐久性の向上を図るとともに、ストッパークリアランスへの影響を少なくすることを目的とする。
【0012】
【課題を解決するための手段および作用】
本発明は、支持側に固定される筒状金具の内周の上部開口側にゴム弾性体からなる防振基体をシール状態に固着するとともに、該防振基体の中央部に振動発生体側に固定される取付金具を埋設固定し、前記筒状金具と取付金具とを前記防振基体を介して結合するとともに、筒状金具における前記防振基体と対向する開口側にゴム膜よりなるダイヤフラムと、それより内側に位置する仕切り体をそれぞれシール状態に固着して、防振基体とダイヤフラムの間の内室を2つの液室に仕切り構成し、両液室を仕切り体に設けたオリフィス通路により連通させてなる二室形の液封入式防振マウントにおいて、前記仕切り体が、環状の周縁部分と、該周縁部分の内周側を塞ぐゴム膜とからなり、前記環状の周縁部分が、外周に前記オリフィス通路を形成するための半径方向外方に開かれた溝を備える断面コの字状のコの字状部分と、該コの字状部分の内周面から半径方向内方に延設された延設部とから構成されて、前記ゴム膜の周縁部が、前記延設部の内周縁部を覆うように該延設部に取り付けられており、前記筒状金具が軸方向にストレートの筒状をなして、該筒状金具の内周に前記仕切り体が嵌着されるとともに、該仕切り体の周縁部分における防振基体との対向側の段面が前記防振基体の内側面における周縁部分の段面に対接せしめられて、前記防振基体が受ける前記振動発生体の支承荷重が前記仕切り体の対接部分で支えられており、前記仕切り体の段面が前記防振基体の段面より広幅に形成されて、前記防振基体の段面から続く防振基体の内面と前記仕切り体の段面との間に軸方向にて隙間が確保され、前記ダイヤフラムの周縁部に設けたリング状の補助金具が、前記仕切り体の周縁部分におけるダイヤフラムとの対向側面に対接されるようにして前記筒状金具の開口部内周に嵌着され、前記筒状金具の端縁のかしめ手段により前記仕切り体とともに筒状金具に固着されており、前記補助金具の内周縁が、前記コの字状部分の内周面よりも半径方向内方であって、かつ前記延設部の内周縁よりも半径方向外方に位置して、前記延設部と前記補助金具の内周縁部との間に軸方向に隙間が確保されたことを特徴とする。
【0013】
この液封入式防振マウントによれば、防振基体の周縁部分が仕切り体の周縁部分に対接しているために、エンジン等の支承荷重による防振基体の撓み変形が抑制される。しかも、撓み変形が小さく静的バネ定数が高くなるために、これをエンジンを支承するのに使用した場合に、複数のマウント毎の分担荷重が異なっていても、ストッパークリアランスの差は小さく、それによる影響は少ない。
【0014】
また上記構成によれば、仕切り体はダイヤフラムの周縁部の補助金具と防振基体の周縁部分とにより挟持された状態となって、筒状金具が単なる筒状をなすものであっても、所定位置に安定性よく保持される。しかも、防振基体が受ける荷重を周縁部の仕切り体の対接部分で支えることができて、前記の撓み抑制の作用を充分に発揮できる。
【0015】
【発明の実施の形態】
次に本発明の実施の1形態を図面に基いて説明する。
【0016】
図1は、本発明に係る液封入式防振マウントの1例を示している。図1のように、筒状の本体金具(1)に嵌着される筒状金具(2)は、軸方向にストレートの単なる筒状をなしており、この筒状金具(2)の内周の上部開口側にエンジンの荷重を受けるゴム弾性体からなる防振基体(3)が加硫成形手段によりシール状態に接着され一体的に固着されるとともに、図のように該防振基体(3)の中央部に上側の取付金具(9)が加硫成形手段により埋設されて固定されている。すなわち筒状金具(2)と取付金具(9)とが防振基体(3)を介して結合されている。
【0017】
また筒状金具(2)の下部開口側に前記防振基体(3)と対向してゴム膜よりなるダイヤフラム(4)とそれより内側に位置する仕切り体(5)とがシール状態に取着されている。こうして防振基体(3)とダイヤフラム(4)の間の内室が、外周にオリフィス通路(6)を有する仕切り体(5)によって、防振基体(3)が室壁の一部をなす第1の液室(7)と、前記ダイヤフラム(4)が室壁の一部をなす第2の液室(8)とに仕切り構成され、該両液室(7)(8)がオリフィス通路(6)により連通せしめられている。両液室への連通口は図示を省略している。これにより二室形の液封入式防振マウントを構成している。
【0018】
上側の取付金具(9)には、取付用ボルトの連結用ネジ込み穴(9a)が設けられている。通常、前記の筒状金具(2)が嵌着される本体金具(1)と取付金具(9)のうち、取付金具(9)が自動車エンジン等の振動発生体側のブラケットに固定され、本体金具(1)が車体シャーシー等の支持側に固定されて使用される。この本体金具(1)には、必要に応じて取付け用のステイ(図示省略)が設けられる。
【0019】
前記の仕切り体(5)とダイヤフラム(4)とは、図のように、周縁部分にオリフィス通路(6)としての溝を有する仕切り体(5)と、ダイヤフラム(4)の周縁部に有する補助金具(4a)とが、筒状金具(2)の開口部内周に嵌着されるとともに、該筒状金具(2)の端縁(2a)のかしめ手段により筒状金具(2)に抜脱不能に固着されている。
【0020】
そしてこの発明では、防振基体(3)の内側面つまり第1の液室(7)側の面の周縁部分に、マウント軸心に対して略直角の段面(3a)を形成するとともに、これに対向する仕切り体(5)の周縁部分における防振基体(3)との対向側段面(5a)とを接着することなく対接させて設けている。
【0021】
仕切り体(5)の周縁部分における防振基体との対向側段面(5a)は、前記段面(3a)より広幅で軸心に対し略直角の段面をなすように形成され、両段面(3a)(5a)同士が接着されることなく対接するとともに、防振基体(3)の段面(3a)から続く内面と仕切り体(5)の段面(5a)との間に軸方向にて隙間を保有している。これにより、防振基体(3)の仕切り体(5)側への撓み変形を、前記段面(3a)(5a)同士の対接部分により規制する作用を果すようになっている。
【0022】
仕切り体(5)の中央部は、ゴム膜(5b)により弾性変形可能に形成され、低周波数域のバネ定数を高めている。詳細には、図2から明らかなように、仕切り体(5)は、環状の周縁部分と、該周縁部分の内周側を塞ぐゴム膜( 5b )とからなり、該環状の周縁部分が、外周にオリフィス通路(6)を形成するための半径方向外方に開かれた溝を備える断面コの字状のコの字状部分と、該コの字状部分の内周面から半径方向内方に延設された延設部とから構成されて、ゴム膜( 5b )の周縁部が、前記延設部の内周縁部を覆うように該延設部に取り付けられている。また、補助金具( 4a )の内周縁が、前記コの字状部分の内周面よりも半径方向内方であって、かつ前記延設部の内周縁よりも半径方向外方に位置しており、これにより、前記延設部と補助金具( 4a )の内周縁部との間に軸方向に隙間が確保されている。
【0023】
また筒状金具(2)内の前記仕切り体(5)およびダイヤフラム(4)の補助金具(4a)の嵌着部には、防振基体(3)と一体のゴムシール層(3b)が設けられており、これにより仕切り体(5)および補助金具(4a)がシール状態に保持されて取着されている。さらにダイヤフラム(4)は、そのゴム膜の一部が前記補助金具(4a)の外側を包被して、該ゴム膜層(4b)が仕切り体(5)との間のシール作用を果すようになっている。
【0024】
なお、図示していないが、ダイヤフラム(4)の外方を覆うカバー(図示せず)を筒状金具(2)と一体に取付けて、ダイヤフラム(4)の外側に空気室を形成する場合もある。
【0025】
さらに、上記の防振マウントのストッパー機構として、上側の取付金具(9)の一部を鍔状に突出させて、該鍔状部(9a)を防振基体(3)と一体のゴム層により包被してストッパー用突出部(10)として形成し、一方、本体金具(1)の上端部を上方に延長するとともに、前記ストッパー用突出部(10)よりやや上方で内方に折曲して、その内周端部(11)を、取付金具(9)の振動による上方への変位量が大きいときに、前記突出部(10)が弾力的に当接するストッパーとして形成しており、これによってそれ以上の変位を抑止するようになっている。
【0026】
なお、図では、前記ストッパー用突出部(10)と内周端部(11)とが当接しているが、通常の使用状態においては、エンジン等の支承荷重により、ストッパー用突出部(10)と内周端部(11)との間に所定のクリアランスを保有する。
【0027】
図における(12)は、上側の取付金具(9)に固着されたカバー兼用のストッパー部材である。このストッパー部材(12)は、取付金具(9)が下方に大きく変位したときに、中央の厚肉板部(12a)が前記本体金具(1)の内周端部(11)に弾力的に当接することでそれ以上の撓み変形を抑止できるようになっており、また横揺れ作用に対しては、外周のスカート状部(12b)が本体金具(1)の延長部に当接することで過度の横揺れを規制するように設けられている。
【0028】
上記の防振マウントにおいて、本体金具(1)を省略して、筒状金具(2)を本体金具を兼ねた構成とすることも可能である。また仕切り体(5)を、鉄鋼板からの絞り加工により形成することも可能であり、この場合も、中央部にゴム板を設けて実施するのが好適である。
【0029】
上記の防振マウントは、例えば自動車エンジンを支承するのに使用する場合、上側の取付金具(9)と本体金具(1)とにより、エンジン等の支持ブラケットと車体フレームとにそれぞれ固定されて使用される。この使用において、二つの液室(7)(8)相互間の液流動効果と防振基体(3)による防振効果により、優れた振動減衰および振動絶縁性を発揮する。
【0030】
しかして、エンジン等の支承荷重により防振基体(3)が撓み変形するが、防振基体(3)は、その内側面における周縁部分の段面(3a)が仕切り体(5)の周縁部分における液室(7)側の段面(5a)とが対接しているために、下方向きの撓み変形が周縁部分で適度に抑制されて、静バネ定数が増大する。すなわち、撓み量が少なくなり、また撓み変形によるクリープ量も少なくなる。
【0031】
またそのため、エンジンを支承するのに同種、同格の複数の防振マウントを使用した場合において、使用個所によって分担荷重が異なることになっても、前記のように支承荷重による撓みが抑制されるために、ストッパークリアランスの差も小さくなり、ストッパークリアランスの設定に対する影響が少なく、打音等の発生も防止できることになる。
【0032】
しかも、防振基体(3)の段面(3a)と仕切り体(5)の段面(5a)とは接着されることなく対接しているので、動的バネ定数は高くならず、従来と同様の防振特性を確保できる。
【0033】
【発明の効果】
上記したように本発明によれば、動的バネ定数を上げることなく静バネ定数を上げることができ、防振基体の撓み変形を小さくして、クリープ量を小さくし、耐久性の向上を図ることができる。
【0034】
特に下方向きの撓み変形を適度に抑制できるため、分担荷重が異なる場合にもストッパークリアランスへの影響が少なく、打音発生を防止できる。またエンジンの揺動を抑制でき、操縦安定性を高めることができる。
【図面の簡単な説明】
【図1】 本発明の1実施形態の液封入式防振マウントの縦断正面図である。
【図2】 同上の一部の拡大断面図である。
【図3】 従来の液封入式防振マウントを例示する。
【符号の説明】
(1) 本体金具
(2) 筒状金具
(3) 防振基体
(3a) 段面
(4) ダイヤフラム
(4a) 補助金具
(5) 仕切り体
(5a) 段面
(6) オリフィス通路
(7) 第1の液室
(8) 第2の液室
(9) 取付金具
(10) ストッパー用突出部
(11) ストッパー用の内周端部
(12) ストッパー部材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid-filled vibration-proof mount mainly used for vibration-proof support of a vibration generator such as an automobile engine.
[0002]
[Background Art and Problems to be Solved by the Invention]
As a liquid-filled vibration-proof mount for supporting a vibration generating body such as an automobile engine so as not to transmit the vibration to the vehicle body, various structures having been proposed have been proposed.
[0003]
For example, as shown in FIG. 3, a cylindrical metal fitting (52) and a mounting metal fitting (59) are coupled by a vibration isolating base (53) made of a rubber elastic body, and the vibration isolating base in the cylindrical metal fitting (52) A diaphragm (54) made of a rubber film and a partition body (55) located inside the rubber film are fixed in a sealed state on the opposite opening end side, and an inner chamber between the vibration isolating base (53) and the diaphragm (54) The two liquid chambers (57) and (58) are divided into two liquid chambers (57) and (58), and the two liquid chambers (57) and (58) are communicated with each other through an orifice passage (56) provided in the partition body (55). There is a two-chamber liquid-sealed anti-vibration mount configured to perform a vibration damping function and a vibration insulating function due to the vibration-proofing effect of the substrate. (51) is a cylindrical main body fitting that holds the cylindrical fitting (52), and the main body fitting (51) may be formed integrally with the cylindrical fitting.
[0004]
When the anti-vibration mount having such a structure is used to support an automobile engine, the upper mounting bracket (59) is usually fastened to the bracket on the engine side.
[0005]
In this use, the vibration isolating base (53) bends under the load of the engine or the like, but the vibration isolating base (53) is fixed to the cylindrical metal fitting (52) as described above, and the partition body ( 55), the anti-vibration base body (53) is bent and deformed over the entire inner part of the cylindrical fitting (52).
[0006]
Accordingly, there is a problem that the amount of bending when the load is applied increases, and the amount of creep of the vibration-proof substrate (53) due to bending deformation increases accordingly, so that sufficient durability cannot be obtained.
[0007]
In addition, this type of anti-vibration mount is provided with an upper mounting bracket (59) and a main body bracket (51) fixed to the vehicle body frame in order to restrict large displacements due to vibration of the engine or the like. A stopper that abuts when the displacement due to vibration is large is provided.
[0008]
For example, in the case of FIG. 3, a protrusion (59a) encased in a rubber layer integral with the vibration isolating base (53) is provided on a part of the upper mounting bracket (59), and above the main body bracket (51). The inner end portion (51a) of the extension portion is formed as a stopper with which the projecting portion (59a) elastically contacts (usually has a clearance) when the amount of upward displacement due to vibration is large, Therefore, further displacement is suppressed.
[0009]
Usually, in such an anti-vibration mount, it is set so as to have a substantially constant stopper clearance for a substantially constant load according to the static spring constant of the anti-vibration base. In the case of mounting at the position, the shared load varies depending on the use location, and due to the non-uniformity of the shared load, the stopper clearance for each mount also becomes non-uniform, leading to the occurrence of hitting sound.
[0010]
However, increasing the static spring constant of the rubber elastic body itself that constitutes the vibration isolating base also increases the dynamic spring constant, which greatly changes the spring characteristics and provides the expected vibration prevention effect. It is not preferable because it disappears.
[0011]
The present invention has been made in view of the above, and can increase the static spring constant without increasing the dynamic spring constant, and can reduce the bending deformation of the anti-vibration base, in particular, the downward bending deformation, thereby reducing the bending deformation. The purpose is to reduce the amount of creep by reducing the impact on the stopper clearance.
[0012]
[Means and Actions for Solving the Problems]
In the present invention, a vibration-proof base made of a rubber elastic body is fixed in a sealed state on the upper opening side of the inner periphery of a cylindrical metal fitting fixed to the support side, and fixed to the vibration generator side at the center of the vibration-proof base. The mounting bracket is embedded and fixed, the cylindrical bracket and the mounting bracket are coupled via the vibration isolation base, and a diaphragm made of a rubber film on the opening side of the cylindrical bracket facing the vibration isolation base, The partition bodies located on the inner side are fixed in a sealed state, and the inner chamber between the vibration isolating base and the diaphragm is divided into two liquid chambers, and both liquid chambers communicate with each other by an orifice passage provided in the partition body. In the two-chamber liquid-filled vibration-proof mount, the partition body includes an annular peripheral portion and a rubber film that closes the inner peripheral side of the peripheral portion, and the annular peripheral portion is formed on the outer periphery. Forming the orifice passage A U-shaped portion having a U-shaped cross-section with a groove opened radially outward, and an extending portion extending radially inward from the inner peripheral surface of the U-shaped portion The rubber film has a peripheral edge portion attached to the extending portion so as to cover an inner peripheral edge portion of the extending portion, and the cylindrical metal fitting has a straight cylindrical shape in the axial direction. Te, stage circumferential portion Rutotomoni is the partition member is fitted an inner periphery of the tubular fitting, the step surface of the opposite side of the vibration-isolating base at the peripheral portion of the partition member in the inner surface of the vibration-isolating base The bearing load of the vibration generating body that is brought into contact with the surface and received by the vibration isolation base is supported by the contact portion of the partition body, and the step surface of the partition body is from the step surface of the vibration isolation base body. An axial direction between the inner surface of the anti-vibration base and the step surface of the partition formed from the step surface of the anti-vibration base is formed wide. The ring-shaped auxiliary metal fitting provided at the peripheral edge of the diaphragm is in contact with the side surface facing the diaphragm at the peripheral edge of the partition body, and is provided on the inner periphery of the opening of the cylindrical metal fitting. The auxiliary metal fitting is fixed to the cylindrical metal fitting together with the partition by caulking means at the edge of the cylindrical metal fitting, and the inner peripheral edge of the auxiliary metal fitting is more radial than the inner peripheral surface of the U-shaped portion. A gap is secured in the axial direction between the extending portion and the inner peripheral edge portion of the auxiliary metal fitting, and located radially outward from the inner peripheral edge of the extending portion. It is characterized by.
[0013]
According to this liquid-filled vibration-proof mount, since the peripheral portion of the vibration-proof base is in contact with the peripheral portion of the partition, bending deformation of the vibration-proof base due to a bearing load of an engine or the like is suppressed. Moreover, since the flexural deformation is small and the static spring constant is high, when this is used to support the engine, the difference in stopper clearance is small even if the shared load for each mount is different. There is little influence by.
[0014]
Further , according to the above configuration, even if the partition is in a state of being sandwiched between the auxiliary metal fitting on the peripheral edge of the diaphragm and the peripheral edge portion of the vibration isolating base, the cylindrical metal fitting is a simple cylinder, It is stably held in place. In addition, the load received by the vibration-proof base can be supported by the contact portion of the partition at the peripheral edge, and the above-described action of suppressing the deflection can be sufficiently exhibited.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 shows an example of a liquid-filled vibration-proof mount according to the present invention . As shown in FIG. 1, the cylindrical metal fitting (2) fitted to the cylindrical main metal fitting (1) has a simple cylindrical shape straight in the axial direction, and the inner periphery of the cylindrical metal fitting (2). An anti-vibration base (3) made of a rubber elastic body that receives the load of the engine is bonded to the sealing state by the vulcanization molding means and is integrally fixed to the upper opening side of the anti-vibration base (3) as shown in the figure. The upper mounting bracket (9) is embedded and fixed by vulcanization molding means in the center of the bracket. That is, the cylindrical metal fitting (2) and the attachment metal fitting (9) are coupled via the vibration isolating base (3).
[0017]
In addition, a diaphragm (4) made of a rubber film and a partition body (5) located on the inner side thereof are attached in a sealed state on the lower opening side of the cylindrical metal fitting (2) so as to face the vibration isolating base (3). Has been. In this way, the inner chamber between the vibration isolating base (3) and the diaphragm (4) has a partition (5) having an orifice passage (6) on the outer periphery, and the vibration isolating base (3) forms a part of the chamber wall. 1 of the liquid chamber (7), the die arrow ram (4) is a partition configured second liquid chamber forming part of the chamber wall (8), the both fluid chambers (7) (8) is an orifice The passage (6) communicates. Illustration of communication ports to both liquid chambers is omitted. This constitutes a two-chamber liquid-filled vibration-proof mount.
[0018]
The upper mounting bracket (9) is provided with a screw-in hole (9a) for connecting a mounting bolt. Usually, of the body fitting (1) and the fitting (9) to which the cylindrical fitting (2) is fitted , the attachment fitting (9) is fixed to a bracket on the vibration generating body side of an automobile engine or the like, and the body fitting (1) is used by being fixed to a support side of a vehicle body chassis or the like. The main body fitting (1) is provided with a stay for mounting (not shown) as required.
[0019]
As shown in the figure, the partition body (5) and the diaphragm (4) include a partition body (5) having a groove as an orifice passage (6) in the peripheral portion and an auxiliary portion provided in the peripheral portion of the diaphragm (4). The metal fitting (4a) is fitted into the inner periphery of the opening of the cylindrical metal fitting (2), and is removed from the cylindrical metal fitting (2) by the caulking means of the edge (2a) of the cylindrical metal fitting (2). It is fixed impossible.
[0020]
In the present invention, a step surface (3a) substantially perpendicular to the mount axis is formed on the inner surface of the vibration isolating base (3), that is, the peripheral portion of the surface on the first liquid chamber (7) side, The opposing step surface (5a) with the vibration isolating substrate (3) at the peripheral portion of the partition (5) facing this is provided in contact with the antivibration base (3) without bonding.
[0021]
The stepped surface (5a) facing the anti-vibration base at the peripheral portion of the partition (5) is formed so as to form a stepped surface that is wider than the stepped surface (3a) and substantially perpendicular to the axis. The surfaces (3a) and (5a) are in contact with each other without being bonded, and a shaft is provided between the inner surface continuing from the step surface (3a) of the vibration isolating base (3) and the step surface (5a) of the partition body (5). Has a gap in the direction . Thereby, the deformation | transformation deformation | transformation to the partition body (5) side of an anti-vibration base | substrate (3) is controlled by the contact part of the said step surfaces (3a) (5a).
[0022]
The central portion of the partition body (5) is formed to be elastically deformable by the rubber film (5b), and increases the spring constant in the low frequency range. Specifically, as is clear from FIG. 2, the partition (5) is composed of an annular peripheral portion and a rubber film ( 5b ) that closes the inner peripheral side of the peripheral portion. A U-shaped section having a U-shaped cross-section having a groove opened radially outward to form an orifice passage (6) on the outer periphery, and a radially inner side from the inner peripheral surface of the U-shaped section; The rubber film ( 5b ) is attached to the extended portion so as to cover the inner peripheral edge of the extended portion. Further, the inner peripheral edge of the auxiliary metal fitting ( 4a ) is located radially inward from the inner peripheral surface of the U-shaped portion and radially outward from the inner peripheral edge of the extending portion. Thus , a gap is secured in the axial direction between the extended portion and the inner peripheral edge of the auxiliary metal fitting ( 4a ).
[0023]
A rubber seal layer (3b) integral with the vibration-proof base (3) is provided at the fitting portion of the partition (5) in the cylindrical metal fitting (2) and the auxiliary metal fitting (4a) of the diaphragm (4). Thus, the partition body (5) and the auxiliary metal fitting (4a) are held in a sealed state and attached. Further die arrow ram (4), the outer portion of the auxiliary metal fitting (4a) of the rubber film and envelope, the rubber layer (4b) is a sealing action between the partition member (5) Has come to an end.
[0024]
Although not shown, a cover (not shown) that covers the outside of the diaphragm (4) may be integrally attached to the cylindrical metal fitting (2) to form an air chamber outside the diaphragm (4). is there.
[0025]
Furthermore, as a stopper mechanism for the above-mentioned vibration-proof mount, a part of the upper mounting bracket (9) is protruded in a hook shape, and the hook-shaped portion (9a) is formed by a rubber layer integrated with the vibration-proof base (3). Covered and formed as a stopper projection (10), while extending the upper end of the body fitting (1) upward and bending inward slightly above the stopper projection (10) The inner peripheral end (11) is formed as a stopper with which the protruding portion (10) elastically contacts when the amount of upward displacement due to vibration of the mounting bracket (9) is large. Therefore, further displacement is suppressed.
[0026]
In the drawing, the stopper protrusion (10) and the inner peripheral edge (11) are in contact with each other. However, in a normal use state, the stopper protrusion (10) is caused by the bearing load of the engine or the like. And a predetermined clearance between the inner peripheral end (11).
[0027]
(12) in the drawing is a stopper member that also serves as a cover and is fixed to the upper mounting bracket (9). The stopper member (12) is configured such that when the mounting bracket (9) is greatly displaced downward, the central thick plate portion (12a) is elastically applied to the inner peripheral end (11) of the main body bracket (1). Further bending deformation can be suppressed by abutting, and the skirt-like portion (12b) on the outer periphery is excessively abutted against the extension portion of the body metal fitting (1) for the rolling action. It is provided to regulate the rolling of the.
[0028]
In the above-mentioned vibration-proof mount, the main body metal fitting (1) may be omitted, and the cylindrical metal fitting (2) may be configured to also serve as the main body metal fitting. Moreover, it is also possible to form the partition body (5) by drawing from a steel plate. In this case as well, it is preferable to provide a rubber plate at the center.
[0029]
For example, when the vibration-proof mount is used to support an automobile engine, it is used by being fixed to a support bracket such as an engine and a vehicle body frame by an upper mounting bracket (9) and a body bracket (1). Is done. In this use, excellent vibration damping and vibration insulation are exhibited by the liquid flow effect between the two liquid chambers (7) and (8) and the vibration isolation effect by the vibration isolation substrate (3).
[0030]
Thus, the vibration-proof base (3) is bent and deformed by the bearing load of the engine or the like, but the step (3a) of the peripheral portion of the vibration-proof base (3) is the peripheral portion of the partition (5). Since the step surface (5a) on the liquid chamber (7) side is in contact with each other, downward bending deformation is moderately suppressed at the peripheral portion, and the static spring constant is increased. That is, the amount of bending is reduced, and the amount of creep due to bending deformation is also reduced.
[0031]
For this reason, when multiple anti-vibration mounts of the same type and the same rating are used to support the engine, even if the shared load varies depending on the location of use, the bending due to the support load is suppressed as described above. In addition, the difference in the stopper clearance is reduced, the influence on the setting of the stopper clearance is small, and the occurrence of a hitting sound or the like can be prevented.
[0032]
Moreover, since the step surface (3a) of the vibration-proof base (3) and the step surface (5a) of the partition (5) are in contact with each other without being bonded, the dynamic spring constant is not increased. Similar anti-vibration characteristics can be secured.
[0033]
【The invention's effect】
As described above, according to the present invention, the static spring constant can be increased without increasing the dynamic spring constant, the flexural deformation of the vibration-proof base is reduced, the creep amount is reduced, and the durability is improved. be able to.
[0034]
In particular, since downward bending deformation can be moderately suppressed, even when the shared load is different, there is little influence on the stopper clearance, and it is possible to prevent occurrence of hitting sound. Further, the engine can be prevented from swinging and the steering stability can be improved.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view of a liquid-filled vibration-proof mount according to an embodiment of the present invention.
FIG. 2 is an enlarged sectional view of a part of the above.
FIG. 3 illustrates a conventional liquid-filled vibration-proof mount.
[Explanation of symbols]
(1) Body bracket (2) Tubular bracket (3) Anti-vibration base (3a) Stepped surface (4) Diaphragm (4a) Auxiliary bracket (5) Partition (5a) Stepped surface (6) Orifice passage (7) No. 1 liquid chamber (8) 2nd liquid chamber (9) Mounting bracket (10) Protrusion for stopper (11) Inner end for stopper (12) Stopper member

Claims (2)

支持側に固定される筒状金具の内周の上部開口側にゴム弾性体からなる防振基体をシール状態に固着するとともに、該防振基体の中央部に振動発生体側に固定される取付金具を埋設固定し、前記筒状金具と取付金具とを前記防振基体を介して結合するとともに、筒状金具における前記防振基体と対向する開口側にゴム膜よりなるダイヤフラムと、それより内側に位置する仕切り体をそれぞれシール状態に固着して、防振基体とダイヤフラムの間の内室を2つの液室に仕切り構成し、両液室を仕切り体に設けたオリフィス通路により連通させてなる二室形の液封入式防振マウントにおいて、
前記仕切り体が、環状の周縁部分と、該周縁部分の内周側を塞ぐゴム膜とからなり、前記環状の周縁部分が、外周に前記オリフィス通路を形成するための半径方向外方に開かれた溝を備える断面コの字状のコの字状部分と、該コの字状部分の内周面から半径方向内方に延設された延設部とから構成されて、前記ゴム膜の周縁部が、前記延設部の内周縁部を覆うように該延設部に取り付けられており、
前記筒状金具が軸方向にストレートの筒状をなして、該筒状金具の内周に前記仕切り体が嵌着されるとともに、該仕切り体の周縁部分における防振基体との対向側の段面が前記防振基体の内側面における周縁部分の段面に対接せしめられて、前記防振基体が受ける前記振動発生体の支承荷重が前記仕切り体の対接部分で支えられており、
前記仕切り体の段面が前記防振基体の段面より広幅に形成されて、前記防振基体の段面から続く防振基体の内面と前記仕切り体の段面との間に軸方向にて隙間が確保され、
前記ダイヤフラムの周縁部に設けたリング状の補助金具が、前記仕切り体の周縁部分におけるダイヤフラムとの対向側面に対接されるようにして前記筒状金具の開口部内周に嵌着され、前記筒状金具の端縁のかしめ手段により前記仕切り体とともに筒状金具に固着されており、
前記補助金具の内周縁が、前記コの字状部分の内周面よりも半径方向内方であって、かつ前記延設部の内周縁よりも半径方向外方に位置して、前記延設部と前記補助金具の内周縁部との間に軸方向に隙間が確保された
ことを特徴とする液封入式防振マウント。
An anti-vibration base made of a rubber elastic body is fixed in a sealed state to the upper opening side of the inner periphery of the cylindrical metal fitting fixed to the support side, and the attachment metal fitting fixed to the vibration generator side at the center of the anti-vibration base The cylindrical metal fitting and the mounting metal fitting are coupled via the vibration isolating base, and a diaphragm made of a rubber film is provided on the opening side of the cylindrical metal fitting that faces the vibration isolating base. Each of the partition bodies positioned is fixed in a sealed state so that the inner chamber between the vibration isolating base and the diaphragm is divided into two liquid chambers, and both liquid chambers are communicated by an orifice passage provided in the partition body. In the chamber type liquid-filled vibration proof mount,
The partition includes an annular peripheral portion and a rubber film that closes the inner peripheral side of the peripheral portion, and the annular peripheral portion is opened radially outward to form the orifice passage on the outer periphery. A U-shaped portion having a U-shaped cross section with a groove, and an extending portion extending radially inward from the inner peripheral surface of the U-shaped portion, A peripheral edge is attached to the extended portion so as to cover an inner peripheral edge of the extended portion,
Form the tubular fitting straight cylindrical in the axial direction, and the partition member on the inner periphery of the tubular fitting is fitted Rutotomoni, stage on the opposite side of the vibration-isolating base at the peripheral portion of the partition member The surface is brought into contact with the stepped surface of the peripheral portion on the inner side surface of the vibration isolating base, and the bearing load of the vibration generating body received by the vibration isolating base is supported by the contacting part of the partition,
The stepped surface of the partition is formed wider than the stepped surface of the vibration isolating substrate, and is axially between the inner surface of the vibration isolating substrate continuing from the stepped surface of the vibration isolating substrate and the stepped surface of the partition. A gap is secured,
A ring-shaped auxiliary metal fitting provided at the peripheral edge of the diaphragm is fitted to the inner periphery of the opening of the cylindrical metal fitting so as to be in contact with the side surface facing the diaphragm at the peripheral edge of the partition, Fixed to the cylindrical metal fitting together with the partition by means of caulking the edge of the metal fitting,
An inner peripheral edge of the auxiliary metal fitting is located radially inward from an inner peripheral surface of the U-shaped portion and radially outward from an inner peripheral edge of the extending portion, A liquid-filled vibration-proof mount characterized in that a gap is secured in the axial direction between the portion and the inner peripheral edge of the auxiliary metal fitting .
前記防振基体の段面がマウント軸心に対して直角に形成されるとともに、これに対向する前記仕切り体の段面がマウント軸心に対して直角に形成されたことを特徴とする請求項1に記載の液封入式防振マウント。 The step surface of the vibration isolating base is formed at a right angle with respect to the mount axis, and the step surface of the partitioning body facing the step surface is formed at a right angle with respect to the mount axis. The liquid-filled vibration-proof mount according to 1.
JP14419396A 1996-06-06 1996-06-06 Liquid filled anti-vibration mount Expired - Lifetime JP3823274B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP14419396A JP3823274B2 (en) 1996-06-06 1996-06-06 Liquid filled anti-vibration mount
PCT/JP1996/003719 WO2004090372A1 (en) 1996-06-06 1996-12-19 Liquid charged type vibro-isolating mount
US08/894,114 US6032935A (en) 1996-06-06 1996-12-19 Liquid enclosing type vibration isolating mount

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14419396A JP3823274B2 (en) 1996-06-06 1996-06-06 Liquid filled anti-vibration mount

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JPH09329180A JPH09329180A (en) 1997-12-22
JP3823274B2 true JP3823274B2 (en) 2006-09-20

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JP3438561B2 (en) * 1997-12-26 2003-08-18 東海ゴム工業株式会社 Liquid filled type vibration damping device
JP3590904B2 (en) 2001-04-16 2004-11-17 東洋ゴム工業株式会社 Anti-vibration device
JP3929927B2 (en) 2003-04-14 2007-06-13 本田技研工業株式会社 Liquid filled mounting device
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