JP3426292B2 - Anti-vibration device - Google Patents

Anti-vibration device

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Publication number
JP3426292B2
JP3426292B2 JP19588593A JP19588593A JP3426292B2 JP 3426292 B2 JP3426292 B2 JP 3426292B2 JP 19588593 A JP19588593 A JP 19588593A JP 19588593 A JP19588593 A JP 19588593A JP 3426292 B2 JP3426292 B2 JP 3426292B2
Authority
JP
Japan
Prior art keywords
diaphragm
vibration
elastic body
partition member
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP19588593A
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Japanese (ja)
Other versions
JPH0754908A (en
Inventor
茂 上福
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.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
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Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP19588593A priority Critical patent/JP3426292B2/en
Publication of JPH0754908A publication Critical patent/JPH0754908A/en
Application granted granted Critical
Publication of JP3426292B2 publication Critical patent/JP3426292B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【発明の詳細な説明】 【0001】 【産業上の利用分野】本発明は、振動発生部からの振動
を吸収する防振装置に関し、例えばメンバーマウント、
ボディマウント及びストラットマウント等の自動車のサ
スペンションなどに好適なものである。 【0002】 【従来の技術】従来より、車体に連結される外筒の内側
にゴム等の弾性体を介して内筒を取り付けると共に液室
を内蔵し、さらに、内筒の上下端部がボディに取り付け
られるような構造の防振装置が知られている。 【0003】この種の防振装置として、図7に示す第1
の防振装置及び図8に示す第2の防振装置等が知られて
おり、以下にこれらの図に基づき従来の防振装置を説明
する。 【0004】つまり、内筒に沿って切断した断面を表す
図7に示すように、第1の防振装置は、外筒110に嵌
合された中間筒116の内部に、ゴム製の弾性体112
を介して内筒114が上下動可能に取り付けられると共
に、液室126を挟んだ弾性体112の下側に、外側リ
ング120と内側リング122との間を繋ぐように配置
されたダイヤフラム124が位置する構造となってい
る。そして、弾性体112とダイヤフラム124との間
に円環状の仕切部材128が配置され、液室126を上
下に区分している。 【0005】一方、内筒を直交して切断した断面を表す
図8(a)に示すように、第2の防振装置は、内筒14
2とこの内筒142の周りに配設した外筒144との間
に弾性体146を加硫接着すると共に、外筒144及び
弾性体146の円周方向の一部を切り欠いて一対の液室
148を設ける構造となっている。そして、図8(b)
に示すように、これら液室148内に、円弧状であって
オリフィス152を設けるための凹部154を有した仕
切部材150がそれぞれ装着され、この仕切部材150
が液室148を紙面と垂直方向に沿って二分している。 【0006】 【発明が解決しようとする課題】ところで、第1の防振
装置では、弾性体112とダイヤフラム124との間に
仕切部材128を配置しなければならない為、前述のよ
うに弾性体112がそれぞれ加硫接着される内筒114
及び中間筒116とは別に、両端部がそれぞれ外側リン
グ120及び内側リング122に加硫接着されたダイヤ
フラム124が必要とされ、仕切部材128を中間筒1
16の下側に組付けた後、このダイヤフラム124を組
付けるようにしていた。この為、第1の防振装置では、
防振装置を構成する部品点数が増えると共に製造工程が
複雑化して、製造コストが増大するという欠点を有す
る。 【0007】また、第2の防振装置では、弾性体146
及び外筒144の切り欠いて仕切部材150を装着する
構造とした為、弾性体146及び外筒144の形状が複
雑化して生産性が低下するという欠点を有する。 【0008】本発明は上記事実を考慮し、分割部分によ
って開閉可能な環状に形成された仕切部材により、部品
点数の削減、製造工程の簡略化及び部品形状の簡略化を
図った防振装置を提供することが目的である。 【0009】 【課題を解決するための手段】本発明による防振装置
は、振動発生部及び振動受け部の一方に連結される筒状
の外筒と、振動発生部及び振動受け部の他方に連結され
且つ前記外筒の内側に位置する内筒と、前記内筒側と前
記外筒側とを連結するように前記内筒と前記外筒との間
に配設される弾性体と、環状に形成され且つ前記内筒と
前記外筒との間に配設されるダイヤフラムと、前記弾性
体と前記ダイヤフラムとの間に位置して前記弾性体及び
前記ダイヤフラムにより内壁面の少なくとも一部が構成
され且つ内部に液体が封入された液室と、前記ダイヤフ
ラムの外径より内径が小さい環状に形成され且つ前記弾
性体と前記ダイヤフラムとの間に配設されて前記液室を
複数の小液室に区分する仕切部材とを備え、前記仕切部
材を周方向に沿って複数の円弧部に分割すると共に、該
複数の円弧部間における一の円弧部間を分割部として接
離可能とし、残りの円弧部間をヒンジ部により回動可能
に連結し、しかも前記仕切部材に該仕切部材の内周側と
外周側とを連通するエア抜き溝部を形成したことを特徴
とする。 【0010】 【作用】弾性体が内筒側と外筒側とを連結し、振動発生
部に外筒あるいは内筒が連結され、振動受け部に内筒あ
るいは外筒が連結されている。また、ダイヤフラムと弾
性体とで液体が封入された液室の内壁面の少なくとも一
部を形成し、仕切部材が液室を複数の小液室に区分す
る。 【0011】この為、振動発生部側から振動が外筒ある
いは内筒に伝達されると、弾性体が変形すると共に液体
が小液室間を流動しあるいは共振する。この結果とし
て、弾性体の内部摩擦に基づく抵抗によって振動が吸収
される他、液体が小液室間を流動する際の液体の摩擦抵
抗、あるいは液体の小液室間での共振によって振動が吸
収されて振動が減衰し、内筒あるいは外筒に連結される
振動受け部側に振動が伝達され難くなる。 【0012】また、本発明の防振装置の組み立てに際し
ては、ダイヤフラムの外径より仕切部材の内径が小さく
形成されているものの、仕切部材が周方向に沿って複数
の円弧部に分割されると共に、複数の円弧部間における
一の円弧部間を分割部として接離可能とし、残りの円弧
部間をヒンジ部により回動可能に連結したことにより、
ヒンジ部を中心として複数の円弧部を回動させて分割部
の隙間を広げれば、弾性体とダイヤフラムとの間に仕切
部材を容易に配設することができる。また、前記仕切部
材に該仕切部材の内周側と外周側とを連通するエア抜き
溝部を形成したことにより、弾性体とダイヤフラムとの
間に仕切部材を装着する際に、エア抜き溝部から空気が
外部に逃げ出すので、容易に仕切部材を取り付けること
ができる。 【0013】従って、ダイヤフラムを直接内筒に取り付
けることが可能となる為、弾性体とダイヤフラムとを個
々に成形した後でこれらを組み合わせる必要がなくな
り、防振装置を構成する部品点数を削減することができ
ると共に、製造工程を簡略化することができる。 【0014】さらに、仕切部材が方向性を有さない環状
に形成されているため、限定された方向から弾性体とダ
イヤフラムとの間に仕切部材を装着する必要がなくな
り、弾性体及び外筒等を円筒形などの簡素化した形状に
でき、防振装置の生産性が向上する。 【0015】 【実施例】本発明の第1実施例に係る防振装置を図1か
ら図4に示し、これらの図に基づき本実施例を説明す
る。 【0016】図1及び図2に示すように、本実施例に係
る防振装置10の外周側には、自動車の車体を構成する
部材であるクロスメンバ(図示せず)側に圧入されて連
結されると共に円筒状に形成された外筒金具12が、備
えられている。この外筒金具12の下端部に全周にわた
って内側に屈曲された係止部12Aが設けられており、
この係止部12Aの下側には、係止部12Aに全周にわ
たって加硫接着されたゴム製のストッパ14が、固着さ
れている。 【0017】外筒金具12の内周側には、円筒状に形成
されると共に上端部が屈曲されてフランジ状とされた中
間筒16の円筒状の部分が嵌合されており、さらに、こ
の中間筒16内の外筒金具12及び中間筒16と同軸状
の位置には、円管状に形成される内筒金具18が配置さ
れている。 【0018】この内筒金具18の上端部に、内筒金具1
8の中程の部分より外径が若干大きく形成された支持部
18Aを有しており、この支持部18Aがボディ20の
下側に当接してボディ20の荷重を支持しつつボディ2
0と内筒金具18とが連結される構造となっている。一
方、内筒金具18の下端部には、ストッパ14と対向す
るように外周側に広がって形成される金属製のストッパ
受け部22が溶接等の手段で固着されている。従って、
このストッパ14及びストッパ受け部22が緩衝材とな
り、ストッパ14がストッパ受け部22に当接した際の
衝撃を吸収すると共に、必要以上の外筒金具12と内筒
金具18との間の変位を制限する。 【0019】さらに、中間筒16と内筒金具18との間
には、ゴム製の弾性体24が中間筒16及び内筒金具1
8にそれぞれ加硫接着されて配置されており、図2に示
すよう、内筒金具18を挟んで弾性体24の左右対象の
位置にそれぞれ穴部26が設けられている。従って、こ
れら穴部26により、外筒金具12に対する内筒金具1
8の左右方向への大きな変位を可能としている。 【0020】一方、弾性体24の図1上、下側には、内
筒金具18の周りを薄く覆う連結部28を挟んで弾性体
24と一体的に形成されたダイヤフラム30(本実施例
では厚さ5mm)が位置しており、ダイヤフラム30が
連結部28を介して弾性体24に繋がっていることにな
る。そして、円環状に形成されて外周面側が外筒金具1
2に嵌合されると共に下端部が係止部12Aに係止され
た金属製の嵌合リング32に、ダイヤフラム30の一端
が加硫接着されて、ダイヤフラム30が連結されてい
る。 【0021】さらに、弾性体24が加硫接着される中間
筒16とダイヤフラム30が加硫接着される嵌合リング
32との間には、それぞれ一対の円弧状に形成された仕
切部材構成材35A、35Bを一対組み合わせて円環状
に形成される合成樹脂製の仕切部材34が、外筒金具1
2に嵌合されつつ配置されており、その上下端部には、
空気を逃がすためのエア抜き溝部42が放射状に延びる
ように形成されている。一方、この仕切部材34の内周
面側上下方向の中央部には、内周側に突出する突部34
Aが形成されている。そして、この突部34Aの先端部
により構成される仕切部材34の内周部分の直径である
内径D1は、嵌合リング32に加硫接着される端部によ
り構成されるダイヤフラム30の外周部分の直径である
外径D2より、小さく構成されている。 【0022】また、外筒金具12の内周面、弾性体24
の下面、連結部28の外周面及び、ダイヤフラム30の
上面等により区画された空間がリング状の液室36を構
成する。さらに、中間筒16と嵌合リング32との間で
外筒金具12に嵌合された仕切部材34の突部34Aの
先端部とダイヤフラム30の端部との間の寸法関係が前
述のようになっている為、液室36内に突部34Aが突
出して、この液室36を小液室である上液室36Aと下
液室36Bとに区分すると共に、突部34Aの先端側に
対向する部分が、通路となるオリフィス38を構成する
こととなる。 【0023】従って、上液室36Aと下液室36Bと
は、オリフィス38を介して常に連通しており、また、
これら上液室36A、下液室36B及びオリフィス38
内には、水、シリコンオイル、エチングリコール等の液
体が充填されている。 【0024】尚、本実施例の防振装置10が本来的に振
動の低減を目的とする主振動方向は図1上の上下方向で
ある矢印Pに沿った方向であるが、この防振装置10
は、矢印Pとそれぞれ直交する方向である図2上の上下
方向である矢印Rに沿った方向及び、図2上の左右方向
である矢印Qに沿った方向からの振動をも、弾性体24
の変形により、低減可能とされている。 【0025】次に本実施例の防振装置10の組み立てを
説明する。この防振装置10の組立に際しては、まず、
弾性体24及びダイヤフラム30を一体的に加硫接着で
きるように、中間筒16、嵌合リング32及び内筒金具
18を配置して、図3に示すように、弾性体24及びダ
イヤフラム30をこれらの間に成形し、加硫接着する。
この後、図3及び図4に示すように、一対の仕切部材構
成材35A、35Bを矢印A方向に沿って移動して、弾
性体24とダイヤフラム30との間に仕切部材構成材3
5A、35Bから成る仕切部材34を装着する。この
際、仕切部材34は上下、左右がそれぞれ対称の円環状
に形成されている為、装着の際に方向性を考慮する必要
がなくなり、組み立てが容易となる。また、エア抜き溝
部42を有している為、エア抜き溝部42から空気が外
部に逃げ出して、容易に仕切部材34を取り付けること
ができる。 【0026】そして、液室36内に液体を充填すべく液
体中において、予め内径を大きめに作製しておいた外筒
金具12内に、中間筒16、弾性体24、嵌合リング3
2及び仕切部材34を一体的に挿入し、図1上、上下方
向よりの圧縮しつつ、外筒金具12の内外径を縮小する
ようにプレス加工等でかしめ加工して、中間筒16、嵌
合リング32及び仕切部材34と、外筒金具12とを嵌
合する。従って、かしめ加工前に、弾性体24と仕切部
材34との間、ダイヤフラム30と仕切部材34との
間、あるいは仕切部材構成材35A、35Bの端部間に
若干の隙間を有していても、上下方向よりの圧縮及びか
しめ加工により隙間がなくなって、図1に示すような状
態で防振装置10が完成され、自動車内に装着されるこ
とになる。 【0027】また、以上のような本実施例による防振装
置10の組み立てに際しては、ダイヤフラム30の外径
D2より仕切部材34の内径D1が小さく形成されてい
るものの、仕切部材34が一対の仕切部材構成材35
A、35Bにより分割されて構成されている為、弾性体
24とダイヤフラム30との間に仕切部材34を容易に
配設することができる。 【0028】従って、ダイヤフラム30を直接内筒金具
18に取り付けることが可能となる為、弾性体24とダ
イヤフラム30とを個々に成形した後でこれらを組み合
わせる必要がなくなり、防振装置10を構成する部品点
数を削減することができると共に、製造工程を簡略化す
ることができる。 【0029】さらに、仕切部材34が方向性を有さない
環状に形成されているため、仕切部材34を弾性体24
とダイヤフラム30との間に限定された方向から装着す
る必要がなくなり、弾性体24及び外筒金具12等の形
状を簡素化できて、防振装置10の生産性が向上する。 【0030】次に本実施例の防振装置10による作用を
説明する。エンジンの振動あるいは路面からの振動がク
ロスメンバを介して外筒金具12に伝達されると、弾性
体24が変形すると共に、液体が上下液室36A、36
B間で流動しあるいは共振する。この結果として、弾性
体24の内部摩擦に基づく抵抗によって振動が吸収され
る他、液体が上下液室36A、36B間を流動する際の
液体の突部34との間の摩擦抵抗、あるいは液体の上下
液室36A、36B間での共振によって振動が吸収され
て振動が減衰し、内筒金具18に連結されるボディ20
側に振動が伝達され難くなる。 【0031】すなわち、弾性体24だけでなく上下液室
36A、36Bを有したことにより、特にQ、R方向の
高周波領域(例えば100Hz〜1000Hz程度)の
振動が以下のように減衰される。 【0032】例えば、クロスメンバからの振動が高速こ
もり音による400Hz程度の振動の場合には、液体が
オリフィス38を介して上液室36Aと下液室36Bと
の間を行き来し、大きな減衰力を発生して振動が吸収さ
れる。また、エンジンの燃焼伝搬音による800Hz程
度の振動の場合には、上下液室36A、36B間で液体
が共振し、絶対ばね定数が低減される。 【0033】一方、クロスメンバ側から大振幅の振動が
伝達されたり、高荷重が加わった場合は、仕切部材34
がその際の変位を規制するだけでなく、外筒金具12の
係止部12Aに取り付けられたストッパ14が、外筒金
具12と内筒金具18との間の相対的な変位に伴って、
ストッパ14と対向して配置されるストッパ受け部22
に当接して変位を規制する。つまり、この当接により、
ゴム製のストッパ14が変形して衝撃を吸収しつつ変位
を制限し、外筒金具12と内筒金具18との間の必要以
上の変位を防止する。 【0034】次に、本発明の第2実施例に係る防振装置
を図5及び図6に示し、この図に基づき本実施例を説明
する。尚、第1実施例と同一の部材には同一の符号を付
し、重複した説明を省略する。 【0035】第1実施例と同様に外筒金具12、中間筒
16、内筒金具18、弾性体24及び嵌合リング32等
を有しているものの、仕切部材34が一対の仕切部材構
成材35A、35Bにより構成されのでなく、仕切部材
34が図5上、上部側で完全に分離される分割部54を
有すると共に、下部側に内周側から外周側に向かって延
びるスリット58が形成されて変形可能となるヒンジ部
56を有している。従って、この分割部54から左右の
円弧部52A、52Bが開かれるものの、ヒンジ部56
により円弧部52A、52Bが常時繋がっているという
構造上の相違を、第1実施例との間に有する。 【0036】この為、この仕切部材34を弾性体24と
ダイヤフラム30との間に装着する際には、図6に示す
ように、ヒンジ部56廻りに一対の円弧部52A、52
Bを開くように回動した状態としてから、装着する。 【0037】従って、本実施例も第1実施例と同様の効
果を奏することになるだけでなく、仕切部材34が単一
の部材により構成される為、より一層の部品点数の削減
及び製造工程の簡略化が可能となる。また、分割部54
及びスリット58内の隙間は、外筒金具12をかしめ加
工する際に押圧されて、無くなる。 【0038】尚、上記実施例において、振動発生部とな
るクロスメンバに外筒金具12を連結し、振動受け部と
なるボディ20に内筒金具18を連結するようにした
が、この逆に、クロスメンバに内筒金具18を連結し、
ボディ20に外筒金具12を連結するような構造として
もよいことは、言うまでもない。 【0039】また、仕切部材34の材質を製造コストと
の兼ね合いから合成樹脂としたが、例えば鋼、アルミニ
ウム等の他の材料により形成してもよく、仕切部材34
以外の部材の材質も上記実施例の記載に限定されるもの
ではない。 【0040】さらに、上記実施例において、自動車のボ
ディの防振を目的としたが、本発明の防振装置は例えば
自動車のエンジンの防振を目的とすることとしてもよ
く、また、自動車以外の他の用途にも用いられることは
いうまでもない。一方、外筒金具、内筒金具及び弾性体
等の形状、寸法なども実施例のものに限定されるもので
はない。 【0041】 【発明の効果】以上説明したように、本発明の防振装置
は、分割部分によって開閉可能な環状に形成された仕切
部材により、部品点数の削減、製造工程の簡略化及び部
品形状の簡略化が図れるという優れた効果を有する。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration device for absorbing vibration from a vibration generator, for example, a member mount,
It is suitable for vehicle suspensions such as body mounts and strut mounts. 2. Description of the Related Art Conventionally, an inner cylinder has been attached to the inside of an outer cylinder connected to a vehicle body via an elastic body such as rubber, and a liquid chamber has been built therein. 2. Description of the Related Art A vibration isolator having a structure that can be attached to a vehicle is known. As this type of vibration isolator, a first type shown in FIG.
And the second vibration isolator shown in FIG. 8 are known, and a conventional vibration isolator will be described below with reference to these drawings. [0004] That is, as shown in FIG. 7 showing a cross section cut along the inner cylinder, the first vibration isolator includes a rubber elastic body inside an intermediate cylinder 116 fitted to the outer cylinder 110. 112
The inner cylinder 114 is vertically movably mounted via the fluid chamber 126, and a diaphragm 124 is disposed below the elastic body 112 with the liquid chamber 126 interposed between the outer ring 120 and the inner ring 122. It has a structure to do. An annular partition member 128 is disposed between the elastic body 112 and the diaphragm 124, and divides the liquid chamber 126 into upper and lower portions. On the other hand, as shown in FIG. 8A showing a cross section of the inner cylinder cut orthogonally, the second vibration isolator
An elastic body 146 is vulcanized and bonded between the outer cylinder 144 and the outer cylinder 144 provided around the inner cylinder 142, and a part of the outer cylinder 144 and the elastic body 146 in the circumferential direction is cut out to form a pair of liquids. The structure is such that a chamber 148 is provided. Then, FIG.
As shown in FIG. 5, partition members 150 each having an arc shape and having a concave portion 154 for providing an orifice 152 are mounted in these liquid chambers 148, respectively.
Divides the liquid chamber 148 into two along the direction perpendicular to the plane of the drawing. In the first vibration isolator, since the partition member 128 must be disposed between the elastic body 112 and the diaphragm 124, as described above, the elastic body 112 is not provided. Are respectively vulcanized and bonded.
In addition to the intermediate cylinder 116, a diaphragm 124 whose both ends are vulcanized and bonded to the outer ring 120 and the inner ring 122, respectively, is required.
After assembling the lower side of the diaphragm 16, the diaphragm 124 is assembled. For this reason, in the first vibration isolator,
There is a drawback that the number of parts constituting the vibration isolator increases and the manufacturing process becomes complicated, thereby increasing the manufacturing cost. In the second vibration isolator, the elastic member 146 is used.
In addition, since the partition member 150 is mounted by cutting the outer cylinder 144, the shapes of the elastic body 146 and the outer cylinder 144 are complicated and productivity is reduced. In view of the above facts, the present invention provides an anti-vibration device which uses a ring-shaped partition member which can be opened and closed by divided portions, thereby reducing the number of parts, simplifying a manufacturing process and simplifying a part shape. The purpose is to provide. A vibration isolator according to the present invention comprises a cylindrical outer cylinder connected to one of a vibration generating section and a vibration receiving section, and a cylindrical outer cylinder connected to the other of the vibration generating section and the vibration receiving section. An inner cylinder connected and positioned inside the outer cylinder, an elastic body disposed between the inner cylinder and the outer cylinder so as to connect the inner cylinder side and the outer cylinder side, And a diaphragm disposed between the inner cylinder and the outer cylinder, and at least a part of an inner wall surface is constituted by the elastic body and the diaphragm located between the elastic body and the diaphragm. A liquid chamber filled with a liquid therein, and an annular shape having an inner diameter smaller than the outer diameter of the diaphragm and disposed between the elastic body and the diaphragm to form the liquid chamber into a plurality of small liquid chambers. And a partition member for dividing the partition member into peripheral parts. Along with dividing into a plurality of arc portions along the direction, one of the arc portions among the plurality of arc portions can be separated and approached as a division portion, and the remaining arc portions are rotatably connected by a hinge portion , Moreover, the partition member has an inner peripheral side with the partition member.
The air vent groove communicating with the outer peripheral side is formed . The elastic body connects the inner cylinder side and the outer cylinder side, the outer cylinder or the inner cylinder is connected to the vibration generating section, and the inner cylinder or the outer cylinder is connected to the vibration receiving section. Further, at least a part of the inner wall surface of the liquid chamber in which the liquid is sealed is formed by the diaphragm and the elastic body, and the partition member divides the liquid chamber into a plurality of small liquid chambers. Therefore, when the vibration is transmitted from the vibration generating section to the outer cylinder or the inner cylinder, the elastic body is deformed and the liquid flows between the small liquid chambers or resonates. As a result, the vibration is absorbed by the resistance based on the internal friction of the elastic body, the vibration is absorbed by the frictional resistance of the liquid when the liquid flows between the small liquid chambers, or the resonance between the liquid small liquid chambers. As a result, the vibration is attenuated, and it is difficult for the vibration to be transmitted to the vibration receiving portion connected to the inner cylinder or the outer cylinder. Further, when assembling the vibration isolator of the present invention, the partition member is formed into a plurality of arc portions along the circumferential direction, although the inner diameter of the partition member is formed smaller than the outer diameter of the diaphragm. By making one arc portion between a plurality of arc portions detachable as a divided portion, and connecting the remaining arc portions rotatably by a hinge portion,
By rotating the plurality of arc portions around the hinge portion to widen the gap between the divided portions, the partition member can be easily arranged between the elastic body and the diaphragm. In addition, the partition
Air release that connects the inner and outer peripheral sides of the partition member to the material
By forming the groove, the elastic body and the diaphragm
When installing a partition member between the
Escape to the outside, so you can easily attach the partition member
Can be. [0013] Therefore, since the diaphragm can be directly attached to the inner cylinder, it is not necessary to combine the elastic body and the diaphragm after they are individually formed, thereby reducing the number of parts constituting the vibration isolator. And the manufacturing process can be simplified. Further, since the partition member is formed in an annular shape having no directionality, it is not necessary to mount the partition member between the elastic body and the diaphragm from a limited direction. Can be made into a simplified shape such as a cylindrical shape, and the productivity of the vibration isolator is improved. FIG. 1 to FIG. 4 show a vibration isolator according to a first embodiment of the present invention. This embodiment will be described with reference to these drawings. As shown in FIGS. 1 and 2, the outer periphery of the vibration isolator 10 according to the present embodiment is press-fitted and connected to a cross member (not shown) which is a member constituting a vehicle body of an automobile. An outer tube fitting 12 formed in a cylindrical shape is provided. A locking portion 12A bent inward over the entire circumference is provided at a lower end portion of the outer tube fitting 12, and
A rubber stopper 14 that is vulcanized and bonded to the locking portion 12A over the entire circumference is fixed to the lower side of the locking portion 12A. A cylindrical portion of the intermediate cylinder 16 which is formed in a cylindrical shape and whose upper end portion is bent into a flange shape is fitted on the inner peripheral side of the outer cylinder fitting 12. At a position coaxial with the outer cylinder fitting 12 and the intermediate cylinder 16 in the intermediate cylinder 16, an inner cylinder fitting 18 formed in a tubular shape is arranged. At the upper end of the inner tube fitting 18, the inner tube fitting 1
8 has a support portion 18A having a slightly larger outer diameter than a middle portion thereof. The support portion 18A abuts on the lower side of the body 20 to support the load of the body 20 while supporting the load of the body 20.
0 and the inner tube fitting 18 are connected. On the other hand, at the lower end of the inner cylindrical member 18, a metal stopper receiving portion 22, which is formed on the outer peripheral side so as to face the stopper 14, is fixed by welding or the like. Therefore,
The stopper 14 and the stopper receiving portion 22 serve as a cushioning material to absorb an impact when the stopper 14 comes into contact with the stopper receiving portion 22, and to prevent the displacement between the outer cylindrical fitting 12 and the inner cylindrical fitting 18 more than necessary. Restrict. Further, an elastic body 24 made of rubber is provided between the intermediate cylinder 16 and the inner cylinder fitting 18.
8 are provided by vulcanization bonding. As shown in FIG. 2, holes 26 are provided at positions symmetrical to the left and right of the elastic body 24 with the inner cylindrical fitting 18 interposed therebetween. Therefore, the inner cylindrical fitting 1 with respect to the outer cylindrical fitting 12 is formed by these holes 26.
8 enables a large displacement in the left-right direction. On the other hand, on the lower side of the elastic body 24 in FIG. 1, a diaphragm 30 (in this embodiment, integrally formed with the elastic body 24) with a connecting portion 28 that thinly covers the inner cylindrical fitting 18 therebetween. (Thickness: 5 mm), and the diaphragm 30 is connected to the elastic body 24 via the connecting portion 28. The outer cylindrical surface 1 is formed in an annular shape,
2, one end of the diaphragm 30 is vulcanized and bonded to a metal fitting ring 32 whose lower end is locked to the locking portion 12A, and the diaphragm 30 is connected. Further, between the intermediate cylinder 16 to which the elastic body 24 is vulcanized and the fitting ring 32 to which the diaphragm 30 is vulcanized, a pair of arc-shaped partition member constituting members 35A are respectively provided. , 35B are combined to form an annular partition member 34 made of a synthetic resin.
2 are arranged while being fitted to each other.
An air vent groove 42 for releasing air is formed to extend radially. On the other hand, at the center of the partition member 34 in the vertical direction on the inner peripheral surface side, a protrusion 34 projecting toward the inner peripheral side is provided.
A is formed. The inner diameter D1, which is the diameter of the inner peripheral portion of the partition member 34 formed by the tip of the protrusion 34A, is the diameter of the outer peripheral portion of the diaphragm 30 formed by the end portion vulcanized and bonded to the fitting ring 32. The outer diameter D2 is smaller than the outer diameter D2. Also, the inner peripheral surface of the outer cylinder fitting 12, the elastic body 24
, The outer peripheral surface of the connecting portion 28, the upper surface of the diaphragm 30, and the like constitute a ring-shaped liquid chamber 36. Further, the dimensional relationship between the distal end of the projection 34A of the partition member 34 fitted to the outer cylinder fitting 12 between the intermediate cylinder 16 and the fitting ring 32 and the end of the diaphragm 30 is as described above. As a result, the protrusion 34A protrudes into the liquid chamber 36, and the liquid chamber 36 is divided into an upper liquid chamber 36A and a lower liquid chamber 36B, which are small liquid chambers, and is opposed to the distal end side of the protrusion 34A. The portion that forms the orifice 38 that serves as a passage. Accordingly, the upper liquid chamber 36A and the lower liquid chamber 36B are always in communication with each other through the orifice 38.
These upper liquid chamber 36A, lower liquid chamber 36B and orifice 38
The inside is filled with a liquid such as water, silicone oil, ethyne glycol and the like. Note that the main vibration direction of the vibration isolator 10 of this embodiment which is originally intended to reduce vibration is a direction along the arrow P which is the vertical direction in FIG. 10
The elastic body 24 also vibrates from a direction along an arrow R which is a vertical direction in FIG. 2 which is a direction orthogonal to the arrow P and a direction along an arrow Q which is a horizontal direction in FIG.
It can be reduced by the deformation of. Next, the assembly of the vibration isolator 10 of the present embodiment will be described. When assembling the vibration isolator 10, first,
The intermediate cylinder 16, the fitting ring 32, and the inner cylinder fitting 18 are arranged so that the elastic body 24 and the diaphragm 30 can be integrally vulcanized and bonded, and as shown in FIG. And vulcanization bonding.
Thereafter, as shown in FIGS. 3 and 4, the pair of partition members 35A and 35B are moved in the direction of arrow A, and the partition members 3 are moved between the elastic body 24 and the diaphragm 30.
A partition member 34 composed of 5A and 35B is mounted. At this time, since the partition member 34 is formed in an annular shape in which the upper and lower sides and the left and right sides are symmetrical, it is not necessary to consider the directionality when mounting, and the assembly is facilitated. Further, since the air vent groove 42 is provided, the air escapes from the air vent groove 42 to the outside, and the partition member 34 can be easily attached. In order to fill the liquid chamber 36 with the liquid, the intermediate cylinder 16, the elastic body 24, the fitting ring 3
2 and the partition member 34 are integrally inserted, and caulking is performed by pressing or the like so as to reduce the inner and outer diameters of the outer cylinder fitting 12 while compressing in the vertical direction in FIG. The mating ring 32 and the partition member 34 are fitted to the outer tube fitting 12. Therefore, before caulking, even if there is a slight gap between the elastic body 24 and the partition member 34, between the diaphragm 30 and the partition member 34, or between the ends of the partition member constituting materials 35A and 35B. The gap is eliminated by the compression and swaging in the vertical direction, and the vibration isolator 10 is completed in the state shown in FIG. 1 and is installed in the automobile. In assembling the vibration isolator 10 according to the present embodiment as described above, although the inner diameter D1 of the partition member 34 is formed smaller than the outer diameter D2 of the diaphragm 30, the partition member 34 is formed by a pair of partition members. Material 35
The partition member 34 can be easily arranged between the elastic body 24 and the diaphragm 30 because the partition member 34 is divided by A and 35B. Therefore, since the diaphragm 30 can be directly attached to the inner cylindrical member 18, it is not necessary to combine the elastic body 24 and the diaphragm 30 after molding them individually, and the vibration isolator 10 is constituted. The number of parts can be reduced, and the manufacturing process can be simplified. Further, since the partition member 34 is formed in an annular shape having no directionality, the partition member 34 is
There is no need to mount the elastic member 24 and the outer cylindrical member 12 and the like from a limited direction between the diaphragm and the diaphragm 30, so that the shapes of the elastic body 24 and the outer tube fitting 12 and the like can be simplified, and the productivity of the vibration isolator 10 is improved. Next, the operation of the vibration isolator 10 of this embodiment will be described. When the vibration of the engine or the vibration from the road surface is transmitted to the outer cylinder 12 via the cross member, the elastic body 24 is deformed and the liquid is transferred to the upper and lower liquid chambers 36A, 36A.
It flows or resonates between B. As a result, the vibration is absorbed by the resistance based on the internal friction of the elastic body 24, and the frictional resistance between the liquid and the protrusion 34 when the liquid flows between the upper and lower liquid chambers 36A and 36B, or the liquid The vibration is absorbed by the resonance between the upper and lower liquid chambers 36A and 36B, and the vibration is attenuated.
Vibration is hardly transmitted to the side. That is, the provision of the upper and lower liquid chambers 36A and 36B in addition to the elastic body 24 attenuates vibrations in the high frequency region (for example, about 100 Hz to 1000 Hz) particularly in the Q and R directions as follows. For example, when the vibration from the cross member is about 400 Hz due to a high-speed muffled sound, the liquid moves between the upper liquid chamber 36A and the lower liquid chamber 36B via the orifice 38, and a large damping force is generated. And vibration is absorbed. In the case of vibration of about 800 Hz due to combustion propagation noise of the engine, the liquid resonates between the upper and lower liquid chambers 36A and 36B, and the absolute spring constant is reduced. On the other hand, when large amplitude vibration is transmitted from the cross member side or a high load is applied, the partition member 34
Not only restricts the displacement at that time, but also the stopper 14 attached to the locking portion 12A of the outer tube fitting 12 causes the relative displacement between the outer tube fitting 12 and the inner tube fitting 18 to
Stopper receiving portion 22 arranged opposite to stopper 14
To limit the displacement. In other words, by this contact,
The rubber stopper 14 is deformed to limit the displacement while absorbing the impact, thereby preventing unnecessary displacement between the outer tube fitting 12 and the inner tube fitting 18. Next, a vibration isolator according to a second embodiment of the present invention is shown in FIGS. 5 and 6, and this embodiment will be described with reference to FIGS. Note that the same members as those in the first embodiment are denoted by the same reference numerals, and redundant description will be omitted. As in the first embodiment, the partition member 34 has a pair of partition members, although it has the outer tube fitting 12, the intermediate tube 16, the inner tube fitting 18, the elastic body 24, the fitting ring 32 and the like. Instead of being constituted by 35A and 35B, the partition member 34 has a divided portion 54 that is completely separated on the upper side in FIG. 5, and a slit 58 that extends from the inner peripheral side to the outer peripheral side is formed on the lower side. And a deformable hinge portion 56. Therefore, although the left and right arc portions 52A and 52B are opened from the divided portion 54, the hinge portion 56
Thus, there is a structural difference from the first embodiment in that the arc portions 52A and 52B are always connected. Therefore, when the partition member 34 is mounted between the elastic body 24 and the diaphragm 30, as shown in FIG. 6, a pair of arc portions 52A, 52 around the hinge portion 56, as shown in FIG.
B is turned to open and then mounted. Therefore, the present embodiment not only has the same effect as the first embodiment, but also because the partition member 34 is constituted by a single member, the number of parts can be further reduced and the manufacturing process can be further reduced. Can be simplified. The dividing unit 54
The gap in the slit 58 is pressed when the outer tube fitting 12 is crimped and disappears. In the above-described embodiment, the outer tube fitting 12 is connected to the cross member serving as the vibration generating unit, and the inner tube fitting 18 is connected to the body 20 serving as the vibration receiving unit. Connect the inner tube fitting 18 to the cross member,
Needless to say, the structure may be such that the outer tube fitting 12 is connected to the body 20. Although the material of the partition member 34 is made of a synthetic resin in consideration of the manufacturing cost, it may be formed of another material such as steel or aluminum.
The materials of other members are not limited to those described in the above embodiment. Furthermore, in the above embodiment, the purpose of the present invention is to dampen the body of an automobile. However, the anti-vibration device of the present invention may be used for the purpose of damping the engine of an automobile, for example. Needless to say, it can be used for other purposes. On the other hand, the shapes, dimensions, and the like of the outer cylinder, the inner cylinder, the elastic body, and the like are not limited to those of the embodiment. As described above, the vibration isolator according to the present invention has a ring-shaped partition member which can be opened and closed by divided portions, thereby reducing the number of parts, simplifying the manufacturing process, and improving the shape of the parts. Has an excellent effect that simplification can be achieved.

【図面の簡単な説明】 【図1】本発明の第1実施例に係る防振装置を示す図で
あって、図2の1−1矢視断面図である。 【図2】本発明の第1実施例に係る防振装置の平面図で
ある。 【図3】本発明の第1実施例に係る防振装置の組み立て
手順を説明する断面図である。 【図4】本発明の第1実施例に係る防振装置の組み立て
手順を説明する平面図である。 【図5】本発明の第2実施例に係る防振装置に適用され
る仕切部材の平面図である。 【図6】本発明の第2実施例に係る防振装置の組み立て
手順を説明する平面図である。 【図7】従来技術に係る第1の防振装置の断面図であ
る。 【図8】従来技術に係る第2の防振装置の断面図であっ
て、(a)は仕切部材の装着前を表す図であり、(b)
は仕切部材の装着後を表す図である。 【符号の説明】 10 防振装置 12 外筒金具(外筒) 18 内筒金具(内筒) 20 ボディ(振動受け部) 24 弾性体 30 ダイヤフラム 34 仕切部材 36 液室 36A 上液室(小液室) 36B 下液室(小液室) D1 内径 D2 外径
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a vibration isolator according to a first embodiment of the present invention, and is a cross-sectional view taken along the line 1-1 of FIG. FIG. 2 is a plan view of the vibration isolator according to the first embodiment of the present invention. FIG. 3 is a sectional view for explaining an assembling procedure of the vibration isolator according to the first embodiment of the present invention. FIG. 4 is a plan view for explaining an assembling procedure of the vibration isolator according to the first embodiment of the present invention. FIG. 5 is a plan view of a partition member applied to a vibration isolator according to a second embodiment of the present invention. FIG. 6 is a plan view illustrating a procedure for assembling a vibration isolator according to a second embodiment of the present invention. FIG. 7 is a cross-sectional view of a first vibration isolator according to the related art. 8A and 8B are cross-sectional views of a second vibration isolator according to the related art, in which FIG. 8A is a diagram illustrating a state before a partition member is mounted, and FIG.
FIG. 5 is a diagram illustrating a state after the partition member is mounted. [Description of Signs] 10 Anti-vibration device 12 Outer tube fitting (outer tube) 18 Inner tube fitting (inner tube) 20 Body (vibration receiving portion) 24 Elastic body 30 Diaphragm 34 Partition member 36 Liquid chamber 36A Upper liquid chamber (small liquid) Chamber) 36B Lower liquid chamber (small liquid chamber) D1 Inside diameter D2 Outside diameter

Claims (1)

(57)【特許請求の範囲】 【請求項1】 振動発生部及び振動受け部の一方に連結
される筒状の外筒と、振動発生部及び振動受け部の他方
に連結され且つ前記外筒の内側に位置する内筒と、前記
内筒側と前記外筒側とを連結するように前記内筒と前記
外筒との間に配設される弾性体と、環状に形成され且つ
前記内筒と前記外筒との間に配設されるダイヤフラム
と、前記弾性体と前記ダイヤフラムとの間に位置して前
記弾性体及び前記ダイヤフラムにより内壁面の少なくと
も一部が構成され且つ内部に液体が封入された液室と、
前記ダイヤフラムの外径より内径が小さい環状に形成さ
れ且つ前記弾性体と前記ダイヤフラムとの間に配設され
て前記液室を複数の小液室に区分する仕切部材とを備
え、 前記仕切部材を周方向に沿って複数の円弧部に分割する
と共に、該複数の円弧部間における一の円弧部間を分割
部として接離可能とし、残りの円弧部間をヒンジ部によ
り回動可能に連結し、しかも前記仕切部材に該仕切部材
の内周側と外周側とを連通するエア抜き溝部を形成した
ことを特徴とする防振装置。
(57) [Claim 1] A cylindrical outer cylinder connected to one of a vibration generator and a vibration receiver, and the outer cylinder connected to the other of the vibration generator and the vibration receiver. An inner cylinder positioned inside the inner cylinder, an elastic body disposed between the inner cylinder and the outer cylinder so as to connect the inner cylinder side and the outer cylinder side, A diaphragm disposed between a cylinder and the outer cylinder, and at least a part of an inner wall surface is formed by the elastic body and the diaphragm located between the elastic body and the diaphragm, and a liquid is contained therein. A sealed liquid chamber,
A partition member that is formed in an annular shape with an inner diameter smaller than the outer diameter of the diaphragm and that is disposed between the elastic body and the diaphragm and that divides the liquid chamber into a plurality of small liquid chambers; Along with dividing into a plurality of arc portions along the circumferential direction, one arc portion between the plurality of arc portions can be separated and approached as a division portion, and the remaining arc portions are rotatably connected by a hinge portion. And the partition member is provided with the partition member.
An anti-vibration device characterized by forming an air vent groove communicating between an inner peripheral side and an outer peripheral side of the vibration control device.
JP19588593A 1993-08-06 1993-08-06 Anti-vibration device Expired - Fee Related JP3426292B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19588593A JP3426292B2 (en) 1993-08-06 1993-08-06 Anti-vibration device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19588593A JP3426292B2 (en) 1993-08-06 1993-08-06 Anti-vibration device

Publications (2)

Publication Number Publication Date
JPH0754908A JPH0754908A (en) 1995-02-28
JP3426292B2 true JP3426292B2 (en) 2003-07-14

Family

ID=16348610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19588593A Expired - Fee Related JP3426292B2 (en) 1993-08-06 1993-08-06 Anti-vibration device

Country Status (1)

Country Link
JP (1) JP3426292B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2224802B1 (en) * 2002-07-31 2005-12-01 Caucho Metal Productos, S.L. HYDRAULICALLY CUSHED ELASTIC SUPPORT.
US8038132B2 (en) * 2005-09-01 2011-10-18 The Pullman Company Hydraulic bushing

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH066253Y2 (en) * 1987-06-08 1994-02-16 日産自動車株式会社 Clamp device
JPH0716130Y2 (en) * 1989-06-21 1995-04-12 東海ゴム工業株式会社 Fluid filled cylinder type vibration damping assembly
JPH051084U (en) * 1991-06-21 1993-01-08 株式会社ニフコ Mounting holder
JP2678707B2 (en) * 1992-06-01 1997-11-17 東海ゴム工業株式会社 Fluid-filled cylindrical anti-vibration assembly

Also Published As

Publication number Publication date
JPH0754908A (en) 1995-02-28

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