JP2001200883A - Liquid sealing vibration isolating device - Google Patents
Liquid sealing vibration isolating deviceInfo
- Publication number
- JP2001200883A JP2001200883A JP2000011213A JP2000011213A JP2001200883A JP 2001200883 A JP2001200883 A JP 2001200883A JP 2000011213 A JP2000011213 A JP 2000011213A JP 2000011213 A JP2000011213 A JP 2000011213A JP 2001200883 A JP2001200883 A JP 2001200883A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- partition member
- liquid chamber
- sub
- liquid
- 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】本発明は液体封入式防振装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid filled type vibration damping device.
【０００２】[0002]
【従来の技術】自動車のエンジンでは、幅広い周波数域
において振動が起こり、とりわけ１０Ｈｚ付近でエンジ
ンシェイク、２０〜４０Ｈｚ付近でアイドル振動、８０
〜２００Ｈｚ付近でこもり音や加速時振動を生じること
が知られている。そのため、エンジンを含むパワーユニ
ットの支持に用いられる防振装置として、複数の周波数
域の振動を効果的に低減できるようにしたものが開発さ
れている（例えば、特開平１０−１２２２９４号公報等
を参照）。2. Description of the Related Art In an automobile engine, vibrations occur in a wide frequency range. In particular, the engine shakes at about 10 Hz, idles at about 20 to 40 Hz,
It is known that a muffled sound and a vibration at the time of acceleration occur around 200 Hz. Therefore, as a vibration isolator used to support a power unit including an engine, a vibration isolator capable of effectively reducing vibration in a plurality of frequency ranges has been developed (for example, see Japanese Patent Application Laid-Open No. H10-122294). ).
【０００３】この種の防振装置として、例えば図１０に
示すような、いわゆるダブルオリフィスタイプの液体封
入式防振装置６０が知られている。As a vibration isolator of this type, a so-called double orifice type liquid filled type vibration isolator 60 as shown in FIG. 10, for example, is known.
【０００４】この液体封入式防振装置６０は、一対の取
付部材６２ａ，６２ｂを連結するゴム弾性体６４とゴム
製の第１ダイヤフラム６６との間に画成された液室内
に、第１仕切部材６８が配設され、この第１仕切部材６
８によって上記液室がゴム弾性体６４側の主液室７０と
第１ダイヤフラム側の第１副液室７２とに画成されてい
る。The liquid-filled type vibration damping device 60 includes a first partition in a liquid chamber defined between a rubber elastic body 64 connecting a pair of mounting members 62a and 62b and a first rubber diaphragm 66. A member 68 is provided, and the first partition member 6
The liquid chamber is defined by a main liquid chamber 70 on the rubber elastic body 64 side and a first sub liquid chamber 72 on the first diaphragm side.
【０００５】上記第１仕切部材６８には、略円板状を呈
したゴム製の第２ダイヤフラム７４が加硫接着されてい
る。[0005] A rubber-made second diaphragm 74 having a substantially disc shape is vulcanized and bonded to the first partition member 68.
【０００６】上記第１仕切部材６８には、第２仕切部材
７６が圧入されており、上記第２ダイヤフラム７４と上
記第２仕切部材７６とによって、上記第１仕切部材６８
内に第２副液室７８が画成されている。[0006] A second partition member 76 is press-fitted into the first partition member 68. The first diaphragm member 68 is formed by the second diaphragm 74 and the second partition member 76.
A second sub liquid chamber 78 is defined therein.
【０００７】上記液体封入式防振装置６０に対して振動
が入力され、上記主液室７０から上記第２副液室７８に
液体が流入すると、上記第２ダイヤフラム７４は撓み変
形する。When a vibration is input to the liquid filled type vibration damping device 60 and the liquid flows from the main liquid chamber 70 into the second sub liquid chamber 78, the second diaphragm 74 bends and deforms.
【０００８】[0008]
【発明が解決しようとする課題】しかし、このような構
成の液体封入式防振装置６０においては、エンジン始動
した際の大きな入力が該液体封入式防振装置６０に作用
すると、上記第２ダイヤフラム７４が、図１１中の波線
で示すように大きく撓み、該第２ダイヤフラム７４の外
周縁が全周に亙って上記第１仕切部材６８に瞬間的に当
接してしまい、異音が発生してしまうという問題が生じ
ている。However, in the liquid filled type vibration damping device 60 having such a structure, when a large input at the time of starting the engine acts on the liquid filled type vibration damping device 60, the second diaphragm is used. As shown by the dashed line in FIG. 11, the outer peripheral edge of the second diaphragm 74 momentarily comes into contact with the first partition member 68 over the entire circumference, and abnormal noise is generated. There is a problem that it.
【０００９】[0009]
【課題を解決するための手段】そこで、請求項１に記載
の発明は、互いに対向して配置されるエンジン側の取付
部材と車体側の取付部材と、上記一対の取付部材を互い
に連結するゴム弾性体と、上記一対の取付部材のいずれ
か一方に固定され、上記ゴム弾性体との間に液室を形成
する第１ダイヤフラムと、上記液室内に配設される共
に、上記一対の取付部材のいずれか一方に固定され、該
液室を上記ゴム弾性体側の主液室と上記第１ダイヤフラ
ム側の第１副液室とに画成する第１仕切部材と、上記第
１仕切部材に圧入された第２仕切部材と、外周縁が上記
第１仕切部材と上記第２仕切部材とによって挟持固定さ
れ、該第１仕切部材と該第２仕切部材との間をシールす
る第２ダイヤフラムと、上記第２ダイヤフラムと上記第
２仕切部材とによって画成され、上記第１仕切部材の内
部に位置する第２副液室と、上記主液室と上記第１副液
室とを連通させる第１オリフィス通路と、上記第１仕切
部材の内周面と上記第２仕切部材の外周面との間に形成
され、上記主液室と上記第２副液室とを連通させると第
２オリフィス通路と、を有する液体封入式防振装置にお
いて、上記第２ダイヤフラムの上記外周縁よりも内周側
に位置し、上記第１副液室及び上記第２副液室に向かっ
て突出する突起部が、該第２ダイヤフラムに設けられて
いることを特徴としている。エンジン始動時や悪路走行
時等、大きな入力が上記液体封入式防振装置に入力され
ると、上記第２ダイヤフラムは上記第１副液室側に向か
って大きく撓み変形する。これによって、上記第２ダイ
ヤフラムが大きく撓み変形すると、上記突起部が徐々に
上記第１仕切部材の内周面に当接する。SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a rubber member for connecting an engine-side mounting member, a vehicle-body-side mounting member, and a pair of mounting members, which are arranged to face each other. An elastic body, a first diaphragm fixed to one of the pair of mounting members and forming a liquid chamber between the rubber elastic body, and a first diaphragm provided in the liquid chamber and the pair of mounting members. A first partition member that defines the liquid chamber as a main liquid chamber on the rubber elastic body side and a first sub liquid chamber on the first diaphragm side, and is press-fitted into the first partition member. A second diaphragm member, an outer peripheral edge of which is sandwiched and fixed between the first partition member and the second partition member, and a second diaphragm for sealing between the first partition member and the second partition member; By the second diaphragm and the second partition member, A second sub-liquid chamber defined and located inside the first partition member; a first orifice passage communicating the main liquid chamber with the first sub-liquid chamber; and an inner periphery of the first partition member. A liquid orifice type vibration isolator formed between the surface and the outer peripheral surface of the second partition member and having a second orifice passage when the main liquid chamber communicates with the second sub liquid chamber. A protrusion is located on the inner peripheral side of the outer peripheral edge of the second diaphragm and protrudes toward the first sub liquid chamber and the second sub liquid chamber, and is provided on the second diaphragm. And When a large input is input to the liquid-filled type vibration damping device at the time of starting the engine, traveling on a rough road, or the like, the second diaphragm is largely bent and deformed toward the first sub liquid chamber. As a result, when the second diaphragm is largely bent and deformed, the projection gradually comes into contact with the inner peripheral surface of the first partition member.
【００１０】請求項２に記載の発明は、請求項１の記載
において、上記突起部が上記第２ダイヤフラムの周方向
に沿って少なくとも２つ以上設けられていることを特徴
としている。これによって、上記突起部が第１仕切部材
に対してソフトに当接する。According to a second aspect of the present invention, in the first aspect, at least two protrusions are provided along a circumferential direction of the second diaphragm. As a result, the protrusion comes into soft contact with the first partition member.
【００１１】請求項３に記載の発明は、請求項１または
２に記載の発明において、上記突起部は、エンジンのア
イドル振動入力に伴う上記第２ダイヤフラムの撓み変形
に際して、上記第１仕切部材及び上記第２仕切部材に対
して接触しないよう、該第１仕切部材及び該第２仕切部
材の内周面に対して所定間隔を空け離間するよう設けら
れていることを特徴としている。これによって、エンジ
ンのアイドル振動等の小さな入力が上記液体封入式防振
装置に作用した際に、上記突起部が上記第１仕切部材及
び第２仕切部材に当接することはない。According to a third aspect of the present invention, in the first or second aspect of the present invention, the first partition member and the first partition member are provided when the second diaphragm flexes and deforms due to an idle vibration input of the engine. It is characterized in that it is provided so as to be spaced apart from the inner peripheral surfaces of the first partition member and the second partition member by a predetermined distance so as not to contact the second partition member. Thus, when a small input such as idle vibration of the engine acts on the liquid-filled type vibration damping device, the protrusion does not come into contact with the first partition member and the second partition member.
【００１２】[0012]
【発明の実施の形態】以下、本発明の一実施例を図面に
基づいて詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.
【００１３】図１に示すように、液体封入式防振装置２
は、振動発生源となるエンジン側に取付られる金属製の
取付部材４と、車体側に取り付けられる金属製の取付部
材６とを備え、これら取付部材４，６が互いに対向した
状態でゴム弾性体８によって連結されている。上記取付
部材６は、有底円筒上の底部金具６ａと、略円筒状の上
部金具６ｂとからなり、底部金具６ａの上縁、すなわち
図１において上方に位置する外周フランジ１０に対して
上記上部金具６ｂの下端部、すなわち図１において下方
の端部をかしめることにより両者が一体に結合されてい
る。また、上記上部金具６ｂの内周面は、上記ゴム弾性
体８から延出した薄肉の被膜部８ａによって覆われてい
る。As shown in FIG. 1, a liquid filled type vibration damping device 2
Is provided with a metal mounting member 4 mounted on the engine side, which is a vibration generating source, and a metal mounting member 6 mounted on the vehicle body side. 8 are connected. The mounting member 6 is composed of a bottom fitting 6a on a bottomed cylinder and a substantially cylindrical upper fitting 6b. The upper part of the mounting member 6 with respect to the upper edge of the bottom fitting 6a, that is, the outer peripheral flange 10 located above in FIG. By crimping the lower end of the metal fitting 6b, that is, the lower end in FIG. 1, the two are integrally connected. The inner peripheral surface of the upper metal fitting 6b is covered with a thin coating 8a extending from the rubber elastic body 8.
【００１４】上記取付部材６の内部には、薄肉で略円板
状を呈した、ゴム材料からなる第１ダイヤフラム１２が
取り付けられている。A thin, substantially disk-shaped first diaphragm 12 made of a rubber material is mounted inside the mounting member 6.
【００１５】この第１ダイヤフラム１２と上記ゴム弾性
体８との間には、非圧縮性の液体が封入された液室１４
が画成されている。A liquid chamber 14 filled with an incompressible liquid is provided between the first diaphragm 12 and the rubber elastic body 8.
Is defined.
【００１６】上記液室１４は、上記取付部材６に取り付
けられ、略円筒状を呈した金属製の第１仕切部材１６に
よって、主液室１８と第１副液室２０とにさらに画成さ
れている。The liquid chamber 14 is mounted on the mounting member 6 and is further defined by a first cylindrical metallic partitioning member 16 into a main liquid chamber 18 and a first sub liquid chamber 20. ing.
【００１７】上記第１仕切部材１６は、車体側端部、す
なわち図１において下方の端部に、エンジン側端部、す
なわち図１において上方の端部の外径よりも大径なつば
状のフランジ部２２が形成されている。このフランジ部
２２及び上記第１ダイヤフラム１２の外周縁は、上記底
部金具６ａの外周フランジ１０と伴に上記上部金具６ｂ
の下端部に挟み込まれ、かしめられて固定されている。
また、この第１仕切部材１６の外周面は、上記上部金具
６ｂの内周面に上記ゴム弾性体８の被膜部８ａを介して
密着している。The first partitioning member 16 has a brim-like end having a diameter larger than the outer diameter of the engine-side end, ie, the upper end in FIG. A flange portion 22 is formed. The outer peripheral edges of the flange portion 22 and the first diaphragm 12 are joined together with the outer peripheral flange 10 of the bottom metal member 6a to the upper metal member 6b.
And is fixed by being swaged at the lower end thereof.
The outer peripheral surface of the first partition member 16 is in close contact with the inner peripheral surface of the upper fitting 6b via the coating 8a of the rubber elastic body 8.
【００１８】そして、上記第１仕切部材１６の外周面に
は、略螺旋状に該外周面を略二周する溝２４が形成され
ている。この溝２４は、一端が上記第１仕切部材１６の
エンジン側の端部で上記主液室１８に連通していると共
に、他端が上記第１仕切部材１６の車体側の端部で上記
第１副液室２０に連通している。On the outer peripheral surface of the first partitioning member 16, a groove 24 is formed in a substantially spiral shape so as to make substantially two rounds on the outer peripheral surface. One end of the groove 24 communicates with the main liquid chamber 18 at the end of the first partition member 16 on the engine side, and the other end is formed at the end of the first partition member 16 on the vehicle body side. It communicates with one sub liquid chamber 20.
【００１９】すなわち、この溝２４によって、上記第１
仕切部材１６の外周面と上記上部金具６ｂの内周面との
間に、上記主液室１８と上記第１副液室２０とを連通す
る第１オリフィス通路２６が形成されている。That is, the first groove is formed by the groove 24.
A first orifice passage 26 is formed between the outer peripheral surface of the partition member 16 and the inner peripheral surface of the upper fitting 6b to communicate the main liquid chamber 18 and the first sub liquid chamber 20.
【００２０】また、上記第１仕切部材１６の車体側端部
の内周側は、全周に亙って略階段状に内径が縮径されて
いる。この縮径部２８には、上記第１仕切部材１６のエ
ンジン側の端部方向に向かって開口した環状溝３０が、
全周に亙って形成されている。上記第１仕切部材１６に
は、図２にも示すように、略有底円筒状の第２仕切部材
３２が圧入されている。この第２仕切部材３２は、有底
端部３４が上記主液室１８側に位置し、開口端部３６が
上記第１副液室２０側に位置するよう圧入されている。The inner diameter of the first partitioning member 16 at the end on the vehicle body side is reduced in a substantially stepwise manner over the entire circumference. An annular groove 30 opening toward the end of the first partition member 16 on the engine side is formed in the reduced diameter portion 28.
It is formed over the entire circumference. As shown in FIG. 2, the second partition member 32 having a substantially bottomed cylindrical shape is press-fitted into the first partition member 16. The second partition member 32 is press-fitted so that the bottomed end 34 is located on the main liquid chamber 18 side and the open end 36 is located on the first sub liquid chamber 20 side.
【００２１】上記第２仕切部材３２は、上記有底端部３
４近傍の外周面が圧入面３８となっており、上記開口端
部３６側の外径が、上記有底端部３４近傍の外径に比べ
僅かに小さく形成されている。The second partition member 32 is connected to the bottomed end portion 3.
The outer peripheral surface in the vicinity of 4 is a press-fitting surface 38, and the outer diameter on the side of the opening end 36 is slightly smaller than the outer diameter in the vicinity of the bottomed end 34.
【００２２】上記有底端部３４には、上記第１仕切部材
１６のエンジン側端部の端面に全周に亙って当接するつ
ば状のフランジ部４０が形成されている。The bottomed end portion 34 is formed with a flange-like flange portion 40 which is in contact with the end surface of the first partition member 16 on the engine side over the entire circumference.
【００２３】上記第２仕切部材３２の外周面には、この
外周面を略一周する長さの溝４２が形成されている。こ
の溝４２と上記第１仕切部材１６の内周面とによって形
成された第２オリフィス通路４４は、一端が上記主液室
１８に連通していると共に、他端が後述する第２副液室
４６に連通している。On the outer peripheral surface of the second partitioning member 32, a groove 42 having a length substantially making a full circle around the outer peripheral surface is formed. One end of the second orifice passage 44 formed by the groove 42 and the inner peripheral surface of the first partition member 16 communicates with the main liquid chamber 18, and the other end has a second sub liquid chamber described later. It communicates with 46.
【００２４】上記第１オリフィス通路２６の長さは上記
第２オリフィス通路４４の長さより長くなるよう形成さ
れている。また、上記第１オリフィス通路２６の断面積
は上記第２オリフィス通路４４の断面積よりも小さく設
定されている。The length of the first orifice passage 26 is formed to be longer than the length of the second orifice passage 44. The sectional area of the first orifice passage 26 is set smaller than the sectional area of the second orifice passage 44.
【００２５】第１仕切部材１６の車体側端部の内周面と
上記第２仕切部材３２の開口端部３６との間には、略円
板状を呈したゴム製の第２ダイヤフラム４８が挟持固定
されている。Between the inner peripheral surface of the first partition member 16 at the end on the vehicle body side and the open end 36 of the second partition member 32, a second rubber diaphragm 48 having a substantially disk shape is provided. It is clamped and fixed.
【００２６】上記第２ダイヤフラム４８と上記第２仕切
部材３２の有底端部３４との間には、この第２ダイヤフ
ラム４８を介して上記第１副液室２０に隣接する第２副
液室４６が画成されている。A second sub-liquid chamber adjacent to the first sub-liquid chamber 20 via the second diaphragm 48 is provided between the second diaphragm 48 and the bottomed end 34 of the second partition member 32. 46 are defined.
【００２７】上記第２ダイヤフラム４８の外周縁５０
は、全周に亙って、図１の上下両方向、すなわち上記第
１仕切部材１６の軸方向に向かって突出した略つば状に
形成されている。The outer peripheral edge 50 of the second diaphragm 48
Is formed in a substantially brim-like shape that protrudes in the vertical direction in FIG. 1, that is, in the axial direction of the first partition member 16 over the entire circumference.
【００２８】そして、図３に示すように、上記外周縁５
０の下端は、上記第１仕切部材１６の環状溝３０に係合
し、密接していると共に、上記外周縁５０の上端は、上
記第２仕切部材３２の開口端部３６に密接している。つ
まり、上記第２ダイヤフラム４８は、その外周縁５０
で、上記第１仕切部１６と上記第２仕切部材３２とに挟
持されている。Then, as shown in FIG.
The lower end of 0 engages the annular groove 30 of the first partition member 16 and is in close contact therewith, and the upper end of the outer peripheral edge 50 is in close contact with the open end 36 of the second partition member 32. . That is, the second diaphragm 48 has its outer peripheral edge 50
The first partition 16 is sandwiched between the first partition 16 and the second partition 32.
【００２９】上記外周縁５０の内周側には、図４及び図
５にも示すように、上記第２副液室４６及び上記第１副
液室２０に向かって突出した４つ突起部５２が形成され
ている。On the inner peripheral side of the outer peripheral edge 50, as shown in FIGS. 4 and 5, four protrusions 52 projecting toward the second sub liquid chamber 46 and the first sub liquid chamber 20. Are formed.
【００３０】これらの突起部５２は、上記第２ダイヤフ
ラム４８の中央を中心とする仮想円Ｓの円周上に位置す
る４つの略円弧状突起であって、断面略楕円形状を呈
し、上記第１仕切部材１６の車体側端部の内周面及び上
記第２仕切部材３２の開口端部３６の内周面に対して、
所定間隔を空け離間している。The projections 52 are four substantially arc-shaped projections located on the circumference of the virtual circle S centered on the center of the second diaphragm 48, and have a substantially elliptical cross section. With respect to the inner peripheral surface of the vehicle-side end of the first partition member 16 and the inner peripheral surface of the open end 36 of the second partition member 32,
They are separated by a predetermined distance.
【００３１】また、上記各突起部５２と上記第１仕切部
材１６の車体側端部の内周面及び上記第２仕切部材３２
の開口端部３６の内周面との間隔は、エンジンのアイド
ル振動等の小さな入力が上記液体封入式防振装置２に作
用した際に、該突起部５２が上記第１仕切部材１６及び
第２仕切部材３２に接触しないように設定されている。
これは、上記主液室１８と上記第２副液室４６の等価断
面積（液室内の液を押す断面積）の比によって決定され
る第２ダイヤフラム４８の変位量に基づいて設定されて
いる。Each of the projections 52, the inner peripheral surface of the first partition member 16 at the end on the vehicle body side, and the second partition member 32
The distance between the opening end 36 and the inner peripheral surface is such that when a small input such as an idle vibration of the engine acts on the liquid-filled type vibration damping device 2, the projection 52 is moved between the first partition member 16 and the first partitioning member 16. It is set so as not to contact the two partition members 32.
This is set based on the amount of displacement of the second diaphragm 48, which is determined by the ratio of the equivalent sectional area of the main liquid chamber 18 and the second sub liquid chamber 46 (the sectional area for pressing the liquid in the liquid chamber). .
【００３２】上記液体封入式防振装置２は、エンジン始
動時や悪路走行時に、非常に大きな入力が加わると、図
６中の波線で示すように、上記第２副液室４６の拡張に
伴って上記第２ダイヤフラム４８が上記第１副液室２０
側に向かって大きく撓み変形し、上記各突起部５２の下
端が上記第１仕切部材１６の内周面に徐々に接触する。
このように構成された液体封入式防振装置２は、上記第
２ダイヤフラム４８が大きく撓み変形した際に、上記各
突起部５２の下端が上記第１仕切部材１６の車体側端部
の内周面に徐々に接触していくので、上記第２ダイヤフ
ラム４８と上記第１仕切部材１６との当たりがソフトに
なり、エンジン始動時や悪路走行時に、該第２ダイヤフ
ラム４８が上記第１仕切部材１６に当接する際に生じる
異音の発生を効果的に抑制することができる。When a very large input is applied when the engine is started or the vehicle is traveling on a rough road, the liquid-filled type vibration damping device 2 expands the second sub-liquid chamber 46 as shown by a broken line in FIG. Accordingly, the second diaphragm 48 is connected to the first sub liquid chamber 20.
The protrusions 52 are largely bent and deformed toward the side, and the lower ends of the protrusions 52 gradually contact the inner peripheral surface of the first partition member 16.
When the second diaphragm 48 is largely bent and deformed, the lower end of each of the projections 52 is formed on the inner periphery of the end of the first partitioning member 16 on the vehicle body side when the second diaphragm 48 is greatly deformed. The contact between the second diaphragm 48 and the first partition member 16 becomes soft because the second diaphragm 48 gradually contacts the first diaphragm member. 16 can be effectively suppressed from being generated when it comes into contact with the noise.
【００３３】また、エンジンのアイドル振動等の小さな
入力では、上記各突起部５２は上記第１仕切部材１６に
接触することはないので、アイドル振動領域における上
記液体封入式防振装置２の動バネ定数が大きくなること
はない。Further, when the input is small such as an idle vibration of the engine, the projections 52 do not come into contact with the first partition member 16, so that the dynamic spring of the liquid-filled type vibration damping device 2 in the idle vibration region. The constant does not increase.
【００３４】尚、上記突起部５２の形状は、上述した実
施例の形状に限定されるものではなく、例えば図７及び
図８に示すように形成することもできる。The shape of the protrusion 52 is not limited to the shape of the embodiment described above, but may be formed as shown in FIGS. 7 and 8, for example.
【００３５】図７に示す突起部５２ａは上述した第１実
施例に突起部５２に比べて厚肉に形成されている。The protrusion 52a shown in FIG. 7 is formed thicker than the protrusion 52 in the first embodiment.
【００３６】また、図８に示す突起部５２ｂは、第２ダ
イヤフラム４８から第１副液室２０及び第２副液室４６
に突出したその外周面の断面形状がそれぞれ略半円形状
に形成されている。そのため、上記第２ダイヤフラム４
８が上記第１副液室２０側に大きく撓み変形すると、上
記突起部５２ｂの外周面が、第１仕切部材１６の車体側
端部の内周面に対して転がるように摺接するので、該第
２ダイヤフラム４８が上記第１仕切部材１６に当接する
際に生じる異音の発生を防止できる。The projection 52b shown in FIG. 8 is provided between the second diaphragm 48 and the first sub liquid chamber 20 and the second sub liquid chamber 46.
The cross-sectional shapes of the outer peripheral surfaces protruding from each other are each formed in a substantially semicircular shape. Therefore, the second diaphragm 4
When the outer peripheral surface of the projection 52b is in sliding contact with the inner peripheral surface of the first partition member 16 at the vehicle body side, the outer peripheral surface of the protruding portion 52b is slidably in contact with the inner peripheral surface of the first partition member 16. It is possible to prevent generation of abnormal noise that occurs when the second diaphragm 48 comes into contact with the first partition member 16.
【００３７】また、図９に示すように、第２ダイヤフラ
ム４８の全周に亙って連続する突起部５２ｃを設けるこ
とも可能である。As shown in FIG. 9, it is also possible to provide a projection 52c that is continuous over the entire circumference of the second diaphragm 48.
【００３８】[0038]
【発明の効果】請求項１に記載の発明によれば、大きな
入力が液体封入式防振装置に入力され、第２ダイヤフラ
ムが大きく撓み変形するのに伴って、第２ダイヤフラム
に設けられた突起部が徐々に第１仕切部材に当接するの
で、上記第２ダイヤフラムが上記第１仕切部材に当接す
る際に生じる異音を効果的に抑制することができる。According to the first aspect of the present invention, a large input is input to the liquid-filled type vibration damping device, and the projection provided on the second diaphragm is greatly deformed as the second diaphragm is largely bent and deformed. Since the portion gradually comes into contact with the first partition member, it is possible to effectively suppress abnormal noise generated when the second diaphragm comes into contact with the first partition member.
【００３９】そして、請求項２に記載の発明によれば、
突起部を第１仕切部材に対してよりソフトに当接させる
ことができるので、更に効果的に異音の発生を抑制する
ことができる。According to the second aspect of the present invention,
Since the protruding portion can be more softly brought into contact with the first partition member, generation of abnormal noise can be more effectively suppressed.
【００４０】また、請求項３に記載の発明によれば、エ
ンジンのアイドル振動等の小さな入力が液体封入式防振
装置に作用した際に、上記突起部が上記第１仕切部材及
び第２仕切部材に当接することはないので、小さな入力
があった際に上記液体封入式防振装置の動バネ定数が上
がってしまい、該液体封入式防振装置の性能が損なわれ
てしまうことを防止することができる。According to the third aspect of the present invention, when a small input such as an idle vibration of the engine acts on the liquid-filled type vibration damping device, the projecting portion causes the first partition member and the second partition member to move. Since it does not come into contact with the members, it is possible to prevent the dynamic spring constant of the liquid-filled type vibration damping device from increasing when a small input is made, thereby preventing the performance of the liquid-filled type vibration damping device from being impaired. be able to.
【図１】本発明に係る液体封入式防振装置の断面図。FIG. 1 is a cross-sectional view of a liquid filled type vibration damping device according to the present invention.
【図２】本発明に係る液体封入式防振装置の要部断面
図。FIG. 2 is a sectional view of a main part of the liquid-filled type vibration damping device according to the present invention.
【図３】図２の破線Ａで囲まれた部分の拡大図。FIG. 3 is an enlarged view of a portion surrounded by a broken line A in FIG. 2;
【図４】本発明に係る液体封入式防振装置の第２ダイヤ
フラムの平面図。FIG. 4 is a plan view of a second diaphragm of the liquid-filled type vibration damping device according to the present invention.
【図５】図４のＢ−Ｂ線に沿った断面図。FIG. 5 is a sectional view taken along the line BB of FIG. 4;
【図６】本発明に係る液体封入式防振装置の第２ダイヤ
フラムが大きく撓み変形した時の状態を示す説明図。FIG. 6 is an explanatory diagram showing a state in which the second diaphragm of the liquid-filled type vibration damping device according to the present invention is largely bent and deformed.
【図７】本発明に係る液体封入式防振装置の第２ダイヤ
フラムの異なる実施例を示す要部断面図。FIG. 7 is a sectional view of a principal part showing a different embodiment of the second diaphragm of the liquid-filled type vibration damping device according to the present invention.
【図８】本発明に係る液体封入式防振装置の第２ダイヤ
フラムの異なる実施例を示す要部断面図。FIG. 8 is a sectional view of a principal part showing a different embodiment of the second diaphragm of the liquid-filled type vibration damping device according to the present invention.
【図９】本発明に係る液体封入式防振装置の第２ダイヤ
フラムの異なる実施例を示す平面図。FIG. 9 is a plan view showing another embodiment of the second diaphragm of the liquid-filled type vibration damping device according to the present invention.
【図１０】従来の液体封入式防振装置の断面図。FIG. 10 is a cross-sectional view of a conventional liquid filled type vibration damping device.
【図１１】図１１における液体封入式防振装置の第２ダ
イヤフラムが大きく撓み変形した時の状態を示す説明
図。FIG. 11 is an explanatory view showing a state in which the second diaphragm of the liquid-filled type vibration damping device in FIG. 11 is largely bent and deformed.
１６…第１仕切部材 ３２…第２仕切部材 ４８…第２ダイヤフラム ５０…外周縁 ５２…突起部 16 First partition member 32 Second partition member 48 Second diaphragm 50 Outer peripheral edge 52 Projection
Claims (3)
取付部材と車体側の取付部材と、 上記一対の取付部材を互いに連結するゴム弾性体と、 上記一対の取付部材のいずれか一方に固定され、上記ゴ
ム弾性体との間に液室を形成する第１ダイヤフラムと、 上記液室内に配設される共に、上記一対の取付部材のい
ずれか一方に固定され、該液室を上記ゴム弾性体側の主
液室と上記第１ダイヤフラム側の第１副液室とに画成す
る第１仕切部材と、 上記第１仕切部材に圧入された第２仕切部材と、 外周縁が上記第１仕切部材と上記第２仕切部材とによっ
て挟持固定され、該第１仕切部材と該第２仕切部材との
間をシールする第２ダイヤフラムと、 上記第２ダイヤフラムと上記第２仕切部材とによって画
成され、上記第１仕切部材の内部に位置する第２副液室
と、 上記主液室と上記第１副液室とを連通させる第１オリフ
ィス通路と、 上記第１仕切部材の内周面と上記第２仕切部材の外周面
との間に形成され、上記主液室と上記第２副液室とを連
通させると第２オリフィス通路と、を有する液体封入式
防振装置において、 上記第２ダイヤフラムの上記外周縁よりも内周側に位置
し、上記第１副液室及び上記第２副液室に向かって突出
する突起部が、該第２ダイヤフラムに設けられているこ
とを特徴とする液体封入式防振装置。1. An engine-side mounting member and a vehicle-body-side mounting member that are arranged to face each other, a rubber elastic body that connects the pair of mounting members to each other, and fixed to one of the pair of mounting members. A first diaphragm that forms a liquid chamber with the rubber elastic body; a first diaphragm that is disposed in the liquid chamber and is fixed to one of the pair of mounting members; A first partition member that defines a main liquid chamber on the body side and a first sub liquid chamber on the first diaphragm side; a second partition member press-fitted into the first partition member; A second diaphragm sandwiched and fixed between the member and the second partition member and sealing between the first partition member and the second partition member; and a second diaphragm and the second partition member. , Located inside the first partition member A second sub-liquid chamber; a first orifice passage for communicating the main liquid chamber with the first sub-liquid chamber; and an inner peripheral surface of the first partition member and an outer peripheral surface of the second partition member. And a second orifice passage formed between the main liquid chamber and the second sub-liquid chamber, the liquid-filled vibration isolator being located on the inner peripheral side of the outer peripheral edge of the second diaphragm. A liquid-filled type vibration damping device, wherein a projection projecting toward the first sub liquid chamber and the second sub liquid chamber is provided on the second diaphragm.
方向に沿って少なくとも２つ以上設けられていることを
特徴とする請求項１に記載の液体封入式防振装置。2. The liquid-filled type vibration damping device according to claim 1, wherein at least two or more projections are provided along a circumferential direction of the second diaphragm.
入力に伴う上記第２ダイヤフラムの撓み変形に際して、
上記第１仕切部材及び上記第２仕切部材に対して接触し
ないよう、該第１仕切部材及び該第２仕切部材の内周面
に対して所定間隔を空け離間するよう設けられているこ
とを特徴とする請求項１または２に記載の液体封入式防
振装置。3. The flexure according to claim 2, wherein the protrusion is configured to bend when the second diaphragm is deformed due to an idle vibration input of the engine.
The first partitioning member and the second partitioning member are provided so as to be spaced apart from the inner peripheral surfaces of the first partitioning member and the second partitioning member at a predetermined interval so as not to contact the first partitioning member and the second partitioning member. The liquid-sealed type vibration damping device according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000011213A JP3679961B2 (en) | 2000-01-20 | 2000-01-20 | Liquid filled vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000011213A JP3679961B2 (en) | 2000-01-20 | 2000-01-20 | Liquid filled vibration isolator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001200883A true JP2001200883A (en) | 2001-07-27 |
| JP3679961B2 JP3679961B2 (en) | 2005-08-03 |
Family
ID=18539106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000011213A Expired - Fee Related JP3679961B2 (en) | 2000-01-20 | 2000-01-20 | Liquid filled vibration isolator |
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| Country | Link |
|---|---|
| JP (1) | JP3679961B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012160805A1 (en) * | 2011-05-23 | 2012-11-29 | 東海ゴム工業株式会社 | Fluid-filled vibration-control device |
-
2000
- 2000-01-20 JP JP2000011213A patent/JP3679961B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012160805A1 (en) * | 2011-05-23 | 2012-11-29 | 東海ゴム工業株式会社 | Fluid-filled vibration-control device |
| JP2012241842A (en) * | 2011-05-23 | 2012-12-10 | Tokai Rubber Ind Ltd | Fluid-filled vibration-control device |
| CN102906450A (en) * | 2011-05-23 | 2013-01-30 | 东海橡塑工业株式会社 | Fluid-filled vibration-control device |
| US8783668B2 (en) | 2011-05-23 | 2014-07-22 | Tokai Rubber Industries, Ltd. | Fluid-filled type vibration damping device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3679961B2 (en) | 2005-08-03 |
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