JP3563309B2 - Liquid filled type vibration damping device - Google Patents

Liquid filled type vibration damping device Download PDF

Info

Publication number
JP3563309B2
JP3563309B2 JP28781699A JP28781699A JP3563309B2 JP 3563309 B2 JP3563309 B2 JP 3563309B2 JP 28781699 A JP28781699 A JP 28781699A JP 28781699 A JP28781699 A JP 28781699A JP 3563309 B2 JP3563309 B2 JP 3563309B2
Authority
JP
Japan
Prior art keywords
partition member
liquid chamber
diaphragm
peripheral surface
outer peripheral
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.)
Expired - Fee Related
Application number
JP28781699A
Other languages
Japanese (ja)
Other versions
JP2001108008A (en
Inventor
晋吾 畠山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kinugawa Rubber Industrial Co Ltd
Original Assignee
Kinugawa Rubber Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kinugawa Rubber Industrial Co Ltd filed Critical Kinugawa Rubber Industrial Co Ltd
Priority to JP28781699A priority Critical patent/JP3563309B2/en
Publication of JP2001108008A publication Critical patent/JP2001108008A/en
Application granted granted Critical
Publication of JP3563309B2 publication Critical patent/JP3563309B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Combined Devices Of Dampers And Springs (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、複数の振動減衰域を有する液体封入式防振装置に関する。
【０００２】
【従来の技術】
自動車のエンジンを含むパワーユニットには幅広い周波数域で振動が起こるため、これら複数の周波数域で生じる振動を低減することができる防振装置が開発されている。この種の防振装置の技術としては、例えば、特開平８−４８２３号公報に開示されるようなものがある。
【０００３】
以下、この防振装置を、図５に基づいて簡単に説明する。
【０００４】
振動発生源となるパワーユニット側に取り付けられる取付部材５０と、車体側に取り付けられる取付部材５２とがゴム弾性体５４によって連結されている。上記車体側の取付部材５２は略円板状の底部金具５２ａと、略円筒状の上部金具５２ｂとからなり、この底部金具５２ａの外周縁が上記上部金具５２ｂの下端にかしめられている。
【０００５】
上記底部金具５２ａに上記上部金具５２ｂをかしめた部分には、第１仕切部材５６のフランジ部５８及び第１ダイヤフラム６０の周縁部が挟みこまれ固定されている。
【０００６】
上記第１ダイヤフラム６０と上記ゴム弾性体５４との間には、液室が画成されている。この液室は、略円筒状の上記第１仕切部材５６によって、主液室６２と第１副液室６４とに画成されている。
【０００７】
上記第１仕切部材５６には、主液室側となる端部内周面に略円板状の第２ダイヤフラム６６が加硫接着されていると共に、略有底円筒状の第２仕切部材６８が圧入されている。
【０００８】
上記第２仕切部材６８の有底端部７０と上記第２ダイヤフラム６６との間に第２副液室７２が画成されている。
【０００９】
上記第１副液室６４は、上記第１仕切部材５６の外周面に設けられた溝と上記上部金具５２ｂの内周面とから形成された第１オリフィス通路７４によって、上記主液室６２に連通している。また、上記第２副液室７２は、上記第２仕切部材６８の外周面に設けられた溝と上記第１仕切部材５６の内周面とから形成された第２オリフィス通路７６によって、上記第１副液室６４に連通している。
【００１０】
【発明が解決しようとする課題】
しかし、このように構成された防振装置においては、第２仕切部材６８が、第１仕切部材５６に対して、圧入箇所以外では十分に密着していないという問題がある。すなわち、第２仕切部材６８の有底端部７０側の外周面は、圧入面７８となって第１仕切部材５６の内周面に密着していると考えられるものの、第２仕切部材６８の開口端部８０側の外周面と第１仕切部材５６の内周面との密着度は、構造上、上記圧入面７８と第１仕切部材５６の内周面の密着度に比べ相対的に低いと考えられる。従って、上記第２オリフィス通路７６が十分なシール性を得られず、所期の防振特性を得られなくなる虞がある。
【００１１】
また、加硫接着により上記第２ダイヤフラム６６が、上記第１仕切部材５６に固定されているため、製造コストが高くなってしまうという問題がある。
【００１２】
【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パワーユニット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と共に、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略円筒状の第１仕切部材と、
略有底円筒状に形成され、有底端部が前記主液室側に、開口端部が前記第１副液室側に位置するように前記第１仕切部材に前記有底端部近傍の外周面が圧入された第２仕切部材と、
前記第１仕切部材と第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第２オリフィス通路とを有し、
前記第１副液室側の第１仕切部材の端部の内周側は全周に亙って内径が縮径され、この縮径部には、前記第１仕切部材の主液室側の端部方向に向かって開口した環状溝が全周に亙って形成されており、
前記第２ダイヤフラムの外周縁が前記環状溝に係合し、前記第２ダイヤフラムの外周縁が前記第２仕切部材の開口端部に押圧されて、前記第２ダイヤフラムが前記第１仕切部材の縮径部と第２仕切部材の開口端部とに挟持固定されていることを特徴としている。これによって、第１仕切部材と第２仕切部材との間に形成された第２オリフィス通路は、第２ダイヤフラムによってシールされる。
【００１３】
【発明の実施の形態】
以下、本発明の一実施例を図１〜図４に基づいて詳細の説明する。
【００１４】
液体封入式防振装置２は、振動発生源となるパワーユニット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の内周面には、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。
【００１５】
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。
【００１６】
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、液体が封入された液室１４が画成されている。また、この第１ダイヤフラム１２と上記底部金具６ａとの間には、空気室１５が画成されている。
【００１７】
上記液室１４は、上記取付部材６に取り付けられた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。
【００１８】
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、パワーユニット側端部、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とともに、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６の被膜部８ａを介して密着している。
【００１９】
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のパワーユニット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。
【００２０】
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。
【００２１】
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のパワーユニット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。
【００２２】
上記第１仕切部材１６の内部には、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。
【００２３】
上記第２仕切部材３２は、上記有底端部３４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近傍の外径に比べ小さく形成されている。すなわち、上記第２仕切部材３２の開口端部３６側の外径は、上記第１仕切部材１６の車体側端部の内径より小さく設定されており、図２に示すように、上記開口端部３６の外周面は、上記第１仕切部材の内周面に対して離間している。
【００２４】
上記有底端部３４には、上記第１仕切部材１６のパワーユニット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。上記圧入面３８は、上記第２仕切部材３２の軸方向に沿った所定長さを有している。
【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４２が挟持固定されている。この第２ダイヤフラム４２は、上記第１仕切部材１６の環状溝３０に外周縁が係合しており、上記第２仕切部材３２を上記第１仕切部材１６に圧入することによって、該第１仕切部材１６の縮径部２８と該第２仕切部材３２の開口端部３６とに挟持固定されている。また、この第２ダイヤフラム４２によって、上記第２仕切部材３２の開口端部３６と上記第１仕切部材１６の縮径部２８との間がシールされている。（図２参照）
そして、上記第２ダイヤフラム４２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４２を介して上記第１副液室２０に隣接する第２副液室４４が画成されている。
【００２６】
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４６が形成されている。この溝４６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４８は、一端が上記主液室１８に連通していると共に、他端が上記第２副液室４４に連通している。
【００２７】
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４８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４８の断面積よりも小さく設定されている。
【００２８】
上記液体封入式防振装置２は、第１オリフィス通路２６によって上記主液室１８と上記第１副液室２０との間で液体が流動可能なので、１０Ｈｚ付近の周波数領域で生じるシェイク振動が低減される。また、第２オリフィス通路４８によって上記主液室１８と上記第２副液室４４との間で液体が流動可能なので、２０〜３０Ｈｚ付近の周波数領域で発生するアイドル振動が低減される。
【００２９】
このように構成された液体封入式防振装置２は、図２に示すように、上記第２ダイヤフラム４２によって上記第２仕切部材３２の開口端部３６と上記第１仕切部材１６の内周面との間がシールされている。
【００３０】
つまり、上記第１仕切部材１６の内周面と上記第２仕切部材３２の外周面との間に形成された第２オリフィス通路４８は、有底端部３４側が上記圧入面３８によりシールされ、開口端部３６側が上記第２ダイヤフラム４２によってシールされているので、第２オリフィス通路４８のシール性が向上し、液体封入式防振装置２の所期の特性を確実に得ることができる。
【００３１】
そして、上記第２ダイヤフラム４２は、上記第１仕切部材１６と上記第２仕切部材３２とに挟み込まれることで固定されているので、第１仕切部材１６あるいは第２仕切部材３２に加硫接着する必要がなく、製造コストを低減することができる。
【００３２】
また、図３及び図４に示すように、上記第２仕切部材３２は、上記第１仕切部材１６のパワーユニット側の端部の端面に上記フランジ部４０が当接するまで圧入することにより、第１仕切部材１６に対する第２仕切部材３２及び第２ダイヤフラム４２の相対的な位置決めが容易に決定されるので、組立作業性を向上させることができる。
【００３３】
【発明の効果】
本発明によれば、第２オリフィス通路が、第２仕切部材の圧入により密着した第１仕切部材と第２仕切部材との密着部分と、第２ダイヤフラムとでシールされるので、第２オリフィス通路のシール性が向上し、液体封入式防振装置の所期の特性を確実に得ることができる。
【００３４】
また、第２ダイヤフラムは、第１仕切部材あるいは第２仕切部材等の他部材に加硫接着する必要がないので、製造コストの低減を図ることができる。
【図面の簡単な説明】
【図１】本発明に係る液体封入式防止装置の断面図。
【図２】図１中の破線Ａで囲まれた部分の拡大図。
【図３】第１仕切部材、第２仕切部材及び第２ダイヤフラムの分解断面図。
【図４】第１仕切部材に第２仕切部材及び第２ダイヤフラムが組み付けられた状態を示す説明図。
【図５】従来の液体封入式防止装置の断面図。
【符号の説明】
１２…第１ダイヤフラム
１６…第１仕切部材
１８…主液室
２０…第１副液室
２６…第１オリフィス通路
３０…環状溝
３２…第２仕切部材
３８…圧入面
４２…第２ダイヤフラム
４４…第２副液室
４８…第２オリフィス通路[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a liquid filled type vibration damping device having a plurality of vibration damping regions.
[0002]
[Prior art]
Since vibration occurs in a wide frequency range in a power unit including an automobile engine, a vibration isolator capable of reducing the vibration generated in a plurality of frequency ranges has been developed. As a technique of this type of vibration isolator, for example, there is a technique disclosed in Japanese Patent Application Laid-Open No. H8-4823.
[0003]
Hereinafter, this vibration isolator will be briefly described with reference to FIG.
[0004]
An attachment member 50 attached to the power unit, which is a vibration source, and an attachment member 52 attached to the vehicle body are connected by a rubber elastic body 54. The mounting member 52 on the vehicle body side includes a substantially disk-shaped bottom fitting 52a and a substantially cylindrical upper fitting 52b, and an outer peripheral edge of the bottom fitting 52a is caulked to a lower end of the upper fitting 52b.
[0005]
The flange portion 58 of the first partition member 56 and the peripheral portion of the first diaphragm 60 are sandwiched and fixed to a portion where the upper metal member 52b is caulked to the bottom metal member 52a.
[0006]
A liquid chamber is defined between the first diaphragm 60 and the rubber elastic body 54. The liquid chamber is divided into a main liquid chamber 62 and a first auxiliary liquid chamber 64 by the substantially cylindrical first partition member 56.
[0007]
A substantially disk-shaped second diaphragm 66 is vulcanized and bonded to the inner peripheral surface of the first partition member 56 at an end portion on the main liquid chamber side, and a substantially bottomed cylindrical second partition member 68 is provided. It is press-fitted.
[0008]
A second sub liquid chamber 72 is defined between the bottomed end 70 of the second partition member 68 and the second diaphragm 66.
[0009]
The first sub liquid chamber 64 is connected to the main liquid chamber 62 by a first orifice passage 74 formed by a groove provided on the outer peripheral surface of the first partition member 56 and an inner peripheral surface of the upper fitting 52b. Communicating. The second sub liquid chamber 72 is formed by a second orifice passage 76 formed by a groove provided on an outer peripheral surface of the second partition member 68 and an inner peripheral surface of the first partition member 56. It communicates with one sub-liquid chamber 64.
[0010]
[Problems to be solved by the invention]
However, in the vibration isolator configured as described above, there is a problem that the second partition member 68 does not sufficiently adhere to the first partition member 56 except at the press-fitted portion. That is, although the outer peripheral surface of the second partition member 68 on the bottomed end 70 side is considered to be a press-fit surface 78 and is in close contact with the inner peripheral surface of the first partition member 56, the second partition member 68 The degree of adhesion between the outer peripheral surface on the opening end 80 side and the inner peripheral surface of the first partition member 56 is structurally relatively lower than the degree of adhesion between the press-fit surface 78 and the inner peripheral surface of the first partition member 56. it is conceivable that. Therefore, there is a possibility that the second orifice passage 76 cannot obtain a sufficient sealing property and the desired vibration-proofing property cannot be obtained.
[0011]
Further, since the second diaphragm 66 is fixed to the first partition member 56 by the vulcanization bonding, there is a problem that the manufacturing cost is increased.
[0012]
[Means for Solving the Problems]
In view of the above, the invention according to claim 1 includes a power unit-side mounting member and a vehicle body-side mounting member that are disposed to face each other.
A rubber elastic body connecting the pair of mounting members to each other,
A first diaphragm fixed to one of the pair of mounting members and forming a liquid chamber between the first elastic member and the rubber elastic body;
The liquid chamber is provided in the liquid chamber and is fixed to one of the pair of mounting members. The liquid chamber is divided into a main liquid chamber on the rubber elastic body side and a first sub liquid chamber on the first diaphragm side. A substantially cylindrical first partition member,
The first partition member is formed in a substantially cylindrical shape with a bottom, and has a bottom end near the main liquid chamber and an open end near the first sub liquid chamber. A second partition member having a press-fitted outer peripheral surface ,
A second diaphragm for sealing between the first partition member and the second partition member;
A second auxiliary liquid chamber defined by the second diaphragm and the second partition member and located inside the first partition member;
A first orifice passage for communicating the main liquid chamber with the first sub liquid chamber;
Formed between the outer peripheral surface of the inner peripheral surface and the second partition member of the first partitioning member, and a second orifice passage for communicating the said main liquid chamber and said second auxiliary liquid chamber,
The inner diameter of the end of the first partition member on the side of the first sub liquid chamber is reduced in diameter over the entire circumference, and the reduced diameter portion is provided on the main liquid chamber side of the first partition member. An annular groove opening toward the end is formed over the entire circumference,
An outer peripheral edge of the second diaphragm engages with the annular groove, and an outer peripheral edge of the second diaphragm is pressed against an open end of the second partition member, so that the second diaphragm shrinks the first partition member. It is characterized in that it is sandwiched and fixed between the diameter portion and the opening end of the second partition member . Thus, the second orifice passage formed between the first partition member and the second partition member is sealed by the second diaphragm.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.
[0014]
The liquid-filled type vibration damping device 2 includes a metal mounting member 4 mounted on the power unit side serving as a vibration source and a metal mounting member 6 mounted on the vehicle body. They are connected by a rubber elastic body 8 in an opposed state. The mounting member 6 includes a bottom metal part 6a on a bottomed cylinder and a substantially cylindrical upper metal part 6b. The upper part of the upper part with respect to the upper edge of the bottom metal part 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 fitting 6b is covered with a thin coating 8a extending from the rubber elastic body 8.
[0015]
Inside the mounting member 6, a first diaphragm 12 made of a rubber material and having a thin and substantially disk shape is mounted.
[0016]
A liquid chamber 14 in which a liquid is sealed is defined between the first diaphragm 12 and the rubber elastic body 8. An air chamber 15 is defined between the first diaphragm 12 and the bottom fitting 6a.
[0017]
The liquid chamber 14 is further defined as a main liquid chamber 18 and a first sub liquid chamber 20 by a first cylindrical metallic partitioning member 16 attached to the mounting member 6.
[0018]
The first partition member 16 has a flange end portion 22 having a larger diameter than an outer diameter of an end portion on the vehicle body side, that is, a lower end portion in FIG. Is formed. The outer peripheral edges of the flange portion 22 and the first diaphragm 12 are sandwiched by the lower end portion of the upper metal fitting 6b together with the outer peripheral flange 10 of the bottom metal fitting 6a, and caulked and fixed. 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 6.
[0019]
A groove 24 is formed on the outer peripheral surface of the first partition member 16 in a substantially helical shape and substantially twice around 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 power unit side, and the other end has the end of the groove 24 on the vehicle body side of the first partition member 16. It communicates with one sub-liquid chamber 20.
[0020]
That is, the first orifice for communicating the main liquid chamber 18 and the first sub liquid chamber 20 between the outer peripheral surface of the first partition member 16 and the inner peripheral surface of the upper fitting 6b by the groove 24. A passage 26 is formed.
[0021]
The inner peripheral side of the first partition member 16 at the end on the vehicle body side has an inner diameter reduced in a substantially stepped shape over the entire circumference. An annular groove 30 that opens toward the end of the first partition member 16 on the power unit side is formed in the reduced diameter portion 28 over the entire circumference.
[0022]
A substantially bottomed cylindrical second partition member 32 is press-fitted inside 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.
[0023]
The outer peripheral surface of the second partition member 32 near the bottomed end 34 is a press-fitting surface 38, and the outer diameter of the opening end 36 side is smaller than the outer diameter of the vicinity of the bottomed end 34. It is formed small. That is, the outer diameter of the second partition member 32 on the side of the opening end 36 is set to be smaller than the inner diameter of the first partition member 16 on the side of the vehicle body, and as shown in FIG. The outer peripheral surface of 36 is separated from the inner peripheral surface of the first partition member.
[0024]
The bottomed end portion 34 is formed with a flange-shaped flange portion 40 that is in contact with the end face of the first partition member 16 at the power unit side end over the entire circumference. The press-fit surface 38 has a predetermined length along the axial direction of the second partition member 32.
[0025]
Between the inner peripheral surface of the first partition member 16 at the end on the vehicle body side and the open end portion 36 of the second partition member 32, a rubber-made second diaphragm 42 having a substantially disc shape is sandwiched and fixed. Have been. The outer periphery of the second diaphragm 42 is engaged with the annular groove 30 of the first partition member 16, and the second partition member 32 is pressed into the first partition member 16 to thereby form the first partition member 32. It is pinched and fixed between the reduced diameter portion 28 of the member 16 and the open end 36 of the second partition member 32. Further, the gap between the opening end 36 of the second partition member 32 and the reduced diameter portion 28 of the first partition member 16 is sealed by the second diaphragm 42. (See Fig. 2)
A second auxiliary liquid chamber 44 adjacent to the first auxiliary liquid chamber 20 via the second diaphragm 42 is provided between the second diaphragm 42 and the bottomed end 34 of the second partition member 32. Is defined.
[0026]
On the outer peripheral surface of the second partitioning member 32, a groove 46 having a length substantially making one round around the outer peripheral surface is formed. One end of the second orifice passage 48 formed by the groove 46 and the inner peripheral surface of the first partition member 16 communicates with the main liquid chamber 18, and the other end thereof has the second sub liquid chamber 44. Is in communication with
[0027]
The length of the first orifice passage 26 is formed to be longer than the length of the second orifice passage 48. The cross-sectional area of the first orifice passage 26 is set smaller than the cross-sectional area of the second orifice passage 48.
[0028]
In the liquid filled type vibration damping device 2, since the liquid can flow between the main liquid chamber 18 and the first sub liquid chamber 20 through the first orifice passage 26, the shake vibration generated in a frequency region around 10 Hz is reduced. Is done. In addition, since the liquid can flow between the main liquid chamber 18 and the second sub liquid chamber 44 through the second orifice passage 48, idle vibration generated in a frequency region around 20 to 30 Hz is reduced.
[0029]
As shown in FIG. 2, the liquid-filled type vibration damping device 2 configured as described above uses the second diaphragm 42 to open the end 36 of the second partition member 32 and the inner peripheral surface of the first partition member 16. Is sealed between.
[0030]
That is, the bottomed end 34 side of the second orifice passage 48 formed between the inner peripheral surface of the first partition member 16 and the outer peripheral surface of the second partition member 32 is sealed by the press-fit surface 38, Since the opening end 36 side is sealed by the second diaphragm 42, the sealing performance of the second orifice passage 48 is improved, and the desired characteristics of the liquid-filled type vibration damping device 2 can be reliably obtained.
[0031]
Since the second diaphragm 42 is fixed by being sandwiched between the first partition member 16 and the second partition member 32, the second diaphragm 42 is vulcanized and bonded to the first partition member 16 or the second partition member 32. There is no need, and the manufacturing cost can be reduced.
[0032]
As shown in FIGS. 3 and 4, the second partition member 32 is pressed into the first partition member 16 by press-fitting the end portion of the power unit side end of the first partition member 16 until the flange portion 40 abuts. The relative positioning of the second partition member 32 and the second diaphragm 42 with respect to the partition member 16 is easily determined, so that the assembling workability can be improved.
[0033]
【The invention's effect】
According to the present invention, the second orifice passage is sealed by the second diaphragm and the contact portion between the first partition member and the second partition member, which are brought into close contact with each other by press-fitting the second partition member. Of the liquid-sealed type vibration damping device can be reliably obtained.
[0034]
Further, since the second diaphragm does not need to be vulcanized and bonded to another member such as the first partition member or the second partition member, the manufacturing cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a liquid filling prevention device according to the present invention.
FIG. 2 is an enlarged view of a portion surrounded by a broken line A in FIG.
FIG. 3 is an exploded cross-sectional view of a first partition member, a second partition member, and a second diaphragm.
FIG. 4 is an explanatory view showing a state where a second partition member and a second diaphragm are assembled to the first partition member.
FIG. 5 is a cross-sectional view of a conventional liquid filling prevention device.
[Explanation of symbols]
12 first diaphragm 16 first partition member 18 main liquid chamber 20 first sub liquid chamber 26 first orifice passage 30 annular groove 32 second partition member 38 press-fit surface 42 second diaphragm 44 Second sub liquid chamber 48: second orifice passage

Claims (1)

互いに対向して配置されるパワーユニット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と共に、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略円筒状の第１仕切部材と、
略有底円筒状に形成され、有底端部が前記主液室側に、開口端部が前記第１副液室側に位置するように前記第１仕切部材に前記有底端部近傍の外周面が圧入された第２仕切部材と、
前記第１仕切部材と第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第２オリフィス通路とを有し、
前記第１副液室側の第１仕切部材の端部の内周側は全周に亙って内径が縮径され、この縮径部には、前記第１仕切部材の主液室側の端部方向に向かって開口した環状溝が全周に亙って形成されており、
前記第２ダイヤフラムの外周縁が前記環状溝に係合し、前記第２ダイヤフラムの外周縁が前記第２仕切部材の開口端部に押圧されて、前記第２ダイヤフラムが前記第１仕切部材の縮径部と第２仕切部材の開口端部とに挟持固定されている液体封入式防振装置。A mounting member on the power unit side and a mounting member on the vehicle body side which are arranged to face each other,
A rubber elastic body connecting the pair of mounting members to each other,
A first diaphragm fixed to one of the pair of mounting members and forming a liquid chamber between the first elastic member and the rubber elastic body;
The liquid chamber is disposed in the liquid chamber and is fixed to one of the pair of mounting members. The liquid chamber is divided into a main liquid chamber on the rubber elastic body side and a first sub liquid chamber on the first diaphragm side. A substantially cylindrical first partition member,
The first partition member is formed in a substantially cylindrical shape with a bottom, and has a bottom end near the main liquid chamber and an open end near the first sub liquid chamber. A second partition member having a press-fitted outer peripheral surface ,
A second diaphragm for sealing between the first partition member and the second partition member;
A second auxiliary liquid chamber defined by the second diaphragm and the second partition member and located inside the first partition member;
A first orifice passage for communicating the main liquid chamber with the first sub liquid chamber;
Formed between the outer peripheral surface of the inner peripheral surface and the second partition member of the first partitioning member, and a second orifice passage for communicating the said main liquid chamber and said second auxiliary liquid chamber,
The inner diameter of the end portion of the first partition member on the side of the first sub liquid chamber is reduced in diameter over the entire circumference, and the reduced diameter portion is provided on the main liquid chamber side of the first partition member. An annular groove opening toward the end is formed over the entire circumference,
The outer peripheral edge of the second diaphragm engages with the annular groove, and the outer peripheral edge of the second diaphragm is pressed against the open end of the second partition member, so that the second diaphragm shrinks the first partition member. A liquid filled type vibration damping device fixedly held between the diameter portion and the opening end of the second partition member .
JP28781699A 1999-10-08 1999-10-08 Liquid filled type vibration damping device Expired - Fee Related JP3563309B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28781699A JP3563309B2 (en) 1999-10-08 1999-10-08 Liquid filled type vibration damping device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28781699A JP3563309B2 (en) 1999-10-08 1999-10-08 Liquid filled type vibration damping device

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2004086409A Division JP2004232868A (en) 2004-03-24 2004-03-24 Liquid enclosed type vibration proof device

Publications (2)

Publication Number Publication Date
JP2001108008A JP2001108008A (en) 2001-04-20
JP3563309B2 true JP3563309B2 (en) 2004-09-08

Family

ID=17722143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28781699A Expired - Fee Related JP3563309B2 (en) 1999-10-08 1999-10-08 Liquid filled type vibration damping device

Country Status (1)

Country Link
JP (1) JP3563309B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101813154A (en) * 2009-02-24 2010-08-25 仓敷化工株式会社 liquid-filled vibration isolator
JP2010196747A (en) * 2009-02-24 2010-09-09 Kurashiki Kako Co Ltd Liquid-filled vibration isolator
JP2010196874A (en) * 2009-02-27 2010-09-09 Kurashiki Kako Co Ltd Liquid-filled vibration isolator

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4716616B2 (en) * 2001-06-23 2011-07-06 山下ゴム株式会社 Liquid seal vibration isolator
JP4087217B2 (en) * 2002-10-25 2008-05-21 株式会社東郷製作所 Orifice member for liquid-filled vibration isolator and liquid-filled vibration isolator equipped with the orifice member
JP2007092972A (en) 2005-09-30 2007-04-12 Tokai Rubber Ind Ltd Fluid sealed type vibration control device
JP4740776B2 (en) * 2006-01-20 2011-08-03 東洋ゴム工業株式会社 Liquid-filled vibration isolator
JP4824423B2 (en) * 2006-02-21 2011-11-30 東洋ゴム工業株式会社 Vibration isolator
JP5780646B2 (en) * 2011-09-12 2015-09-16 住友理工株式会社 Active vibration damper
JP5986492B2 (en) * 2012-11-28 2016-09-06 住友理工株式会社 Fluid-filled vibration isolator and manufacturing method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101813154A (en) * 2009-02-24 2010-08-25 仓敷化工株式会社 liquid-filled vibration isolator
EP2221503A1 (en) 2009-02-24 2010-08-25 Kurashiki Kako Co., Ltd. Liquid-filled vibration isolator
JP2010196747A (en) * 2009-02-24 2010-09-09 Kurashiki Kako Co Ltd Liquid-filled vibration isolator
US7802777B2 (en) 2009-02-24 2010-09-28 Kurashiki Kako Co., Ltd. Liquid-filled vibration isolator
CN101813154B (en) * 2009-02-24 2013-02-13 仓敷化工株式会社 Liquid-filled vibration isolator
JP2010196874A (en) * 2009-02-27 2010-09-09 Kurashiki Kako Co Ltd Liquid-filled vibration isolator

Also Published As

Publication number Publication date
JP2001108008A (en) 2001-04-20

Similar Documents

Publication Publication Date Title
US7293755B2 (en) Vibration isolation device
JP2510903B2 (en) Fluid-filled mount device and manufacturing method thereof
JP2799953B2 (en) Liquid ring vibration isolator
JP3697565B2 (en) Liquid-filled vibration isolator
JP3554892B2 (en) Anti-vibration device
JP3563309B2 (en) Liquid filled type vibration damping device
JP4220099B2 (en) Controlled liquid filled vibration isolator
JP2002181117A (en) Fluid sealing type vibration control device and its manufacturing method
JP3740907B2 (en) Fluid filled vibration isolator
JP3039102B2 (en) Fluid-filled mounting device
JP3578605B2 (en) Liquid ring vibration isolator
JP2001349368A (en) Liquid seal type vibration isolation equipment
JP4138165B2 (en) Liquid-filled vibration isolator
JP4202796B2 (en) Liquid-filled vibration isolator
JP2004232868A (en) Liquid enclosed type vibration proof device
JP2003083391A (en) Liquid sealing type vibration control device
JP3934294B2 (en) Liquid filled vibration isolator
JP3679961B2 (en) Liquid filled vibration isolator
JP2001221275A (en) Liquid-filled type vibration-proofing device
JP4018366B2 (en) Fluid filled mount
JP3838280B2 (en) Liquid-filled engine mount
JP3421153B2 (en) Anti-vibration device
JPH11101296A (en) Liquid-filled vibration control device
JP4231980B2 (en) Liquid filled mount
JP2003161341A (en) Liquid sealed vibration control device

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20040122

A131 Notification of reasons for refusal

Effective date: 20040203

Free format text: JAPANESE INTERMEDIATE CODE: A131

RD04 Notification of resignation of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7424

Effective date: 20040303

RD02 Notification of acceptance of power of attorney

Effective date: 20040316

Free format text: JAPANESE INTERMEDIATE CODE: A7422

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040323

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A821

Effective date: 20040316

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Effective date: 20040601

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20040602

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100611

Year of fee payment: 6

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130611

Year of fee payment: 9

LAPS Cancellation because of no payment of annual fees