JPH109333A - Vibration isolating device - Google Patents

Vibration isolating device

Info

Publication number
JPH109333A
JPH109333A JP16796996A JP16796996A JPH109333A JP H109333 A JPH109333 A JP H109333A JP 16796996 A JP16796996 A JP 16796996A JP 16796996 A JP16796996 A JP 16796996A JP H109333 A JPH109333 A JP H109333A
Authority
JP
Japan
Prior art keywords
liquid chamber
diaphragm
outer cylinder
vibration
sub
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.)
Pending
Application number
JP16796996A
Other languages
Japanese (ja)
Inventor
Naohisa Matsuda
尚久 松田
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
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 Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP16796996A priority Critical patent/JPH109333A/en
Publication of JPH109333A publication Critical patent/JPH109333A/en
Pending legal-status Critical Current

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Landscapes

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

Abstract

PROBLEM TO BE SOLVED: To secure the characteristic of a vibration isolating device even though the creep of an elastic body is increased with the lapse of time. SOLUTION: This vibration isolating device has an elastic body 16 to connect an outer tube member 11 and a center member 17, a pressure receiving liquid chamber 28, an auxiliary liquid chamber 29 provided inside the above outer tube member, and a membrane rubber 26 provided between the pressure receiving liquid chamber 28 and the auxiliary liquid chamber 29; and it is composed to furnish a partition wall member 36 to separate both liquid chambers, diaphragm 23 which consists of an elastic membrane to compose a part of the partition of the auxiliary liquid chamber 29 being provided opposing to the membrane rubber 26, a limit passage 30 to communicate the pressure receiving liquid chamber 28 and the auxiliary liquid chamber 29, and a partition plate member 24 having a communication hole 24c communicating between the both sides, as well as to partition the auxiliary liquid chamber 29 into the membrane rubber 26 side and the diaphragm 23 side. A convex 32 projecting at the auxiliary liquid chamber 29 side is provided to the diaphragm 23, so as to make the diaphragm 23 allowable to abut to the partition plate member 24 without blocking the communication hole.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】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、例えば自動車、一般産
業用機械等に適用可能なものである。
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, and is applicable to, for example, automobiles, general industrial machines, and the like.

【0002】[0002]

【従来の技術】従来より振動発生部と振動受け部との間
に液室が設けられ、振動をこの液室内の液体の流動抵抗
などで吸収する吊り下げ形式の防振装置がある。
2. Description of the Related Art Conventionally, there is a suspension type vibration isolator in which a liquid chamber is provided between a vibration generating section and a vibration receiving section, and the vibration is absorbed by the flow resistance of the liquid in the liquid chamber.

【0003】図3はこの従来の吊り下げ形式の防振装置
を示すものである。防振装置101は、振動受け部であ
る車体側へ連結される外筒部材である外筒111を備え
ている。この外筒111は筒部の上端部が蓋板112で
かしめ固定され、下端部はかしめ部113を介して下外
筒114へ固着している。この下外筒114は底部11
4Aを有する筒状であり、この底部114Aの中央に円
形の貫通孔である円孔115が設けられている。
FIG. 3 shows this conventional suspension type vibration damping device. The anti-vibration device 101 includes an outer cylinder 111 that is an outer cylinder member connected to a vehicle body side that is a vibration receiving unit. The upper end of the outer cylinder 111 is caulked and fixed by a cover plate 112, and the lower end is fixed to the lower outer cylinder 114 via a caulking portion 113. This lower outer cylinder 114 is
It has a cylindrical shape having 4A, and a circular hole 115 as a circular through hole is provided at the center of the bottom portion 114A.

【0004】また、外筒111の内部には、外筒111
と同軸的に配設される弾性体116及びセンター部材1
17等が構成されている。このセンター部材117は、
筒状に形成された円筒部118及び、その上端部に溶接
されて固着されているフランジ部119から構成されて
いる。
[0004] Further, inside the outer cylinder 111, an outer cylinder 111 is provided.
Elastic member 116 and center member 1 arranged coaxially with
17 etc. are comprised. This center member 117 is
It comprises a cylindrical portion 118 formed in a cylindrical shape, and a flange portion 119 welded and fixed to the upper end thereof.

【0005】円筒部118は、内周に雌螺子が形成され
ており、下外筒114の下方には、鉄鋳物等で形成され
た取付板120が配設されている。この取付板120に
はボルト孔121が形成され、下方からボルト122を
挿通し、このボルト122を円筒部118の雌螺子に螺
合することにより取付板120がセンター部材117に
固定される。そして防振装置101は、この取付板12
0により振動発生部となるエンジン(図示せず)に連結
される。
[0005] The cylindrical portion 118 has a female screw formed on the inner periphery thereof, and a mounting plate 120 formed of an iron casting or the like is disposed below the lower outer cylinder 114. A bolt hole 121 is formed in the mounting plate 120, a bolt 122 is inserted from below, and the bolt 122 is screwed into a female screw of the cylindrical portion 118 to fix the mounting plate 120 to the center member 117. The vibration isolator 101 is mounted on the mounting plate 12.
0 is connected to an engine (not shown) serving as a vibration generating unit.

【0006】外筒111の内部には弾性体116に面
し、弾性体116の蓋部材112側に受圧液室128
と、受圧液室128の上部には副液室129が配設され
ている。また、この受圧液室128と副液室129の間
には、ゴム等の弾性変形可能な材料で作成された弾性膜
体であるメンブランゴム126が配設されている。そし
て、外筒111の内周には有底円筒状で薄肉膜状のゴム
成形体であるダイアフラム123が加硫接着され、この
ダイアフラム123を介して受圧液室128と副液室1
29を隔離する隔壁部材136が外筒111の内部へ挿
入されている。この隔壁部材136は仕切板部材124
と仕切板部材124の筒部内部に挿入される金具125
及びメンブランゴム126とを備えている。なお、仕切
板部材124及び金具125には、制限通路130が形
成され、これら制限通路130にはそれぞれ透孔130
A及び130Bが設けられており、透孔130A及び1
30Bにより受圧液室128と副液室129が連通して
いる。
[0006] Inside the outer cylinder 111, the elastic body 116 faces the elastic body 116, and the pressure receiving liquid chamber 128 is provided on the lid member 112 side of the elastic body 116.
A sub liquid chamber 129 is provided above the pressure receiving liquid chamber 128. Further, between the pressure receiving liquid chamber 128 and the sub liquid chamber 129, a membrane rubber 126 which is an elastic film made of an elastically deformable material such as rubber is provided. A diaphragm 123 which is a rubber molded body having a bottomed cylindrical shape and a thin film is vulcanized and bonded to the inner periphery of the outer cylinder 111, and the pressure-receiving liquid chamber 128 and the sub-liquid chamber 1 are passed through the diaphragm 123.
A partition member 136 for isolating 29 is inserted into the outer cylinder 111. This partition member 136 is a partition plate member 124.
And a metal fitting 125 inserted into the cylindrical portion of the partition plate member 124
And a membrane rubber 126. Restriction passages 130 are formed in the partition plate member 124 and the metal fitting 125, and the restriction passages 130 are formed in the respective through holes 130.
A and 130B are provided, and the through holes 130A and 1B are provided.
The pressure receiving liquid chamber 128 and the sub liquid chamber 129 communicate with each other by 30B.

【0007】このような構造の防振装置101では、低
周波大振幅振動入力時には、弾性体116が弾性変形し
て受圧液室128が大きく拡縮し、制限通路130を介
して副液室129との間を液体が往復移動する。このよ
うにして制限通路130内での液体の流動により液柱共
振が発生し、これによって振動が減衰される。また、高
周波小振幅振動入力時には、制限通路130を介した液
体の流動は阻止されるが、受圧液室128の拡縮によっ
て、メンブランゴム126が上下に振動して受圧液室1
28の液圧を吸収することにより振動伝達が抑制され
る。なお、メンブランゴム126は振動により仕切板部
材124に当接することもあるが、仕切板部材124が
設けられていることにより動きが規制されるため変形し
すぎることはない。
In the vibration isolator 101 having such a structure, when a low-frequency, large-amplitude vibration is input, the elastic body 116 is elastically deformed, and the pressure-receiving liquid chamber 128 expands and contracts greatly. The liquid reciprocates between. In this manner, liquid column resonance occurs due to the flow of the liquid in the restriction passage 130, and the vibration is thereby attenuated. When a high-frequency small-amplitude vibration is input, the flow of the liquid through the restriction passage 130 is prevented, but the expansion and contraction of the pressure-receiving liquid chamber 128 causes the membrane rubber 126 to vibrate up and down, and
Vibration transmission is suppressed by absorbing the hydraulic pressure of 28. Although the membrane rubber 126 may come into contact with the partition plate member 124 due to vibration, the movement is regulated by the provision of the partition plate member 124, so that the membrane rubber 126 is not excessively deformed.

【0008】[0008]

【発明が解決しようとする課題】従来の防振装置101
では、時間の経過により弾性体116のクリープが大き
くなる恐れがあり、クリープが大きくなると弾性体11
6が歪んで弾性体116に支持されたセンター部材11
7が垂れ下がることになる。このような状態になると受
圧液室128が拡がり、拡がった分、液が副液室129
から受圧液室128に移動し副液室129が縮小され
る。副液室129が縮小されるとダイアフラム123が
垂れ下がったままの状態となり、ダイアフラム123に
よって仕切板部材124の連通孔127が閉塞されてし
まう恐れがあった。連通孔127が閉塞された状態では
メンブランゴム124が十分機能しないため、高周波小
振幅振動入力時に振動が抑制されず、防振装置としての
特性が劣化するという問題があった。
A conventional vibration isolator 101
In such a case, the creep of the elastic body 116 may increase with the passage of time.
6 is distorted and the center member 11 supported by the elastic body 116
7 will hang down. In such a state, the pressure receiving liquid chamber 128 expands, and the liquid is supplied to the sub liquid chamber 129 by the amount of the expansion.
To the pressure receiving liquid chamber 128 and the auxiliary liquid chamber 129 is reduced. When the auxiliary liquid chamber 129 is reduced, the diaphragm 123 remains in a hanging state, and the communication hole 127 of the partition member 124 may be closed by the diaphragm 123. In a state where the communication hole 127 is closed, the membrane rubber 124 does not function sufficiently, so that the vibration is not suppressed at the time of inputting the high-frequency small-amplitude vibration, and there is a problem that the characteristics as the vibration isolator deteriorate.

【0009】そこで、本発明は、上記事実を考慮し、時
間の経過によって弾性体のクリープが大きくなっても防
振装置の特性を確保できる防振装置を提供することを目
的とする。
In view of the above, an object of the present invention is to provide an anti-vibration device that can maintain the characteristics of the anti-vibration device even if the creep of the elastic body increases with time.

【0010】[0010]

【課題を解決するための手段】本発明の防振装置は上記
目的を達成するため、次のような構成としたものであ
る。請求項1の発明は、振動発生部及び振動受け部の一
方に連結される外筒部材と、少なくとも一端側が上記外
筒部材の内方に位置するように配設され、かつ上記外筒
部材より下方に垂下した他端側にて振動発生部及び振動
受け部の他方へ連結されるセンター部材と、上記外筒部
材と上記センター部材とを連結する弾性体と、上記弾性
体に面し、これより上方の上記外筒部材内部に配設され
る受圧液室と、上記受圧液室より上方の上記外筒部材内
部に配設される副液室と、上記受圧液室と上記副液室と
の間に配設されるメンブランゴムを有し、これら両液室
を隔離する隔壁部材と、上記メンブランゴムに対向して
配置され上記副液室の隔壁の一部を構成する弾性薄膜か
らなるダイアフラムと、上記受圧液室と上記副液室とを
連通する制限通路と、上記メンブランゴムと上記ダイア
フラムとの間の上記副液室中に設けられ、上記副液室を
上記メンブランゴム側と上記ダイアフラム側とに区画す
ると共に、これら両側の間を連通する連通孔を有する仕
切板部材とを備えた防振装置であって、上記ダイアフラ
ムに上記副液室側に突出する凸部を設け、この凸部にて
上記連通孔を閉塞することなく上記ダイアフラムを上記
仕切板部材に当接可能に構成したことを特徴とする。
Means for Solving the Problems The vibration isolator of the present invention has the following configuration to achieve the above object. The invention according to claim 1 is an outer cylindrical member connected to one of the vibration generating unit and the vibration receiving unit, and is disposed such that at least one end side is located inside the outer cylindrical member, and A center member connected to the other of the vibration generating section and the vibration receiving section at the other end side hanging down, an elastic body connecting the outer cylinder member and the center member, and facing the elastic body; A pressure-receiving liquid chamber disposed above the outer cylinder member, a sub-liquid chamber disposed inside the outer cylinder member above the pressure-receiving liquid chamber, the pressure-receiving liquid chamber and the sub-liquid chamber, A diaphragm member having a membrane rubber disposed between the two, and separating the two liquid chambers; and a diaphragm made of an elastic thin film disposed to face the membrane rubber and constituting a part of the partition wall of the sub liquid chamber. A restriction passage communicating the pressure receiving liquid chamber and the sub liquid chamber; A partition provided in the sub liquid chamber between the membrane rubber and the diaphragm, dividing the sub liquid chamber into the membrane rubber side and the diaphragm side, and having a communication hole communicating between both sides; A vibration member provided with a plate member, wherein the diaphragm has a projection protruding toward the sub-liquid chamber, and the diaphragm is attached to the partition plate member without closing the communication hole with the projection. It is characterized in that it can be abutted.

【0011】この発明によれば、ダイアフラムに仕切板
部材の連通孔を閉塞しない凸部を設けたことにより、ダ
イアフラムと仕切板部材の連通孔形成面との間で必ず凸
部で形成された隙間が確保され、ダイアフラムが仕切板
部材の連通孔形成面に貼り着き、連通孔を塞ぐことを防
止でき、メンブランゴムの機能が阻止されることがな
い。
According to the present invention, by providing the diaphragm with the convex portion that does not close the communication hole of the partition plate member, the gap always formed by the convex portion between the diaphragm and the communication hole forming surface of the partition plate member is provided. Thus, the diaphragm can be prevented from sticking to the communication hole forming surface of the partition plate member to block the communication hole, and the function of the membrane rubber is not hindered.

【0012】[0012]

【発明の実施の形態】本発明の実施の形態に係る防振装
置の断面図を図1に示す。この防振装置1は、所謂吊り
下げ形式と呼称される防振装置であり、振動受け部であ
る自動車の車体側に連結される外筒部材である外筒11
を備えている。この外筒11は筒状の第1外筒11Aの
上端部が蓋板12でかしめ固着され、下端部はかしめ部
13を介して下外筒14へ固着されている。この下外筒
14は底部14Aを有する筒状であり、この底部14A
の中央部に円形の貫通孔である円孔15が設けられてい
る。
FIG. 1 is a cross-sectional view of a vibration isolator according to an embodiment of the present invention. This vibration isolator 1 is a so-called suspension type vibration isolator, and is an outer cylinder 11 which is an outer cylinder member connected to a vehicle body side of an automobile which is a vibration receiving portion.
It has. The upper end of a cylindrical first outer cylinder 11 </ b> A is fixed by caulking with a cover plate 12, and the lower end of the outer cylinder 11 is fixed to a lower outer cylinder 14 via a caulking portion 13. The lower outer cylinder 14 has a cylindrical shape having a bottom 14A.
Is provided with a circular hole 15 which is a circular through-hole at the center.

【0013】また、下外筒14には、外筒11を車体に
取り付けるための略L字形の取付脚33が固着されてお
り、取付脚33には、図示しない取付ボルトを挿通する
ボルト孔34が形成されている。
A substantially L-shaped mounting leg 33 for mounting the outer cylinder 11 to the vehicle body is fixed to the lower outer cylinder 14, and a bolt hole 34 through which a mounting bolt (not shown) is inserted. Are formed.

【0014】外筒11の内部には弾性体ブロック35及
び隔壁部材36が離れて配置されており、弾性体ブロッ
ク35はそれぞれ外筒11と同軸的に配設される弾性体
16及びセンター部材17等から構成されている。
An elastic block 35 and a partition member 36 are arranged inside the outer cylinder 11 so as to be separated from each other. And so on.

【0015】このセンター部材17は筒状に形成された
円筒部18及びセンター部材17の上端部に溶接され固
着されている底部19Aを有したフランジ部19から構
成されている。
The center member 17 comprises a cylindrical portion 18 formed in a cylindrical shape and a flange portion 19 having a bottom portion 19A welded and fixed to the upper end of the center member 17.

【0016】円筒部18は、内周に雌螺子40が形成さ
れており、センター部材17の下方の一部である先端側
が、下外筒14の底部14Aに形成された円形の円孔1
5から下方へ突出している。また、センター部材17の
基端側となるフランジ部19は小円形の底部19Aを有
し、底部19Aの外周には、上方へ行くに従って径が拡
大されるテーパ部19Bが連続的に形成されており、さ
らにテーパ部19Bの上端には半径方向外側へ延びるリ
ング状の平面部19Cが形成されている。
The cylindrical portion 18 has a female screw 40 formed on the inner periphery, and a distal end, which is a part below the center member 17, is formed in a circular hole 1 formed in the bottom 14A of the lower outer cylinder 14.
5 protrudes downward. Further, the flange portion 19 on the base end side of the center member 17 has a small circular bottom portion 19A, and a tapered portion 19B whose diameter increases as going upward is continuously formed on the outer periphery of the bottom portion 19A. Further, a ring-shaped flat portion 19C extending radially outward is formed at the upper end of the tapered portion 19B.

【0017】一方、弾性体16は笠形の形状とされ、セ
ンター部材17と下外筒14の内周面との間に配設され
て、かしめ部13へ共にかしめ固着される第2外筒11
Bの内周と弾性体16の外周が加硫接着されており、フ
ランジ部19の底部19Aを除く外周面及び円筒部18
の外周面の略上半分は、弾性体16の内周と加硫接着さ
れている。
On the other hand, the elastic body 16 is formed in a hat shape, and is disposed between the center member 17 and the inner peripheral surface of the lower outer cylinder 14 and is fixed to the caulking portion 13 together by the second outer cylinder 11.
B and the outer periphery of the elastic body 16 are vulcanized and bonded, and the outer peripheral surface excluding the bottom portion 19A of the flange portion 19 and the cylindrical portion 18
A substantially upper half of the outer peripheral surface is vulcanized and bonded to the inner periphery of the elastic body 16.

【0018】他方、下外筒14の下方には底部14Aに
対向して、鉄鋳物等で形成されたブラケットである取付
アーム37の角柱部37Aが配設されており、この取付
アーム37の一端部に位置する角柱部37Aは、底部1
4Bに対応した大きさの平面部39を底部14Bに対向
するように有している。この取付アーム37の角柱部3
7Aの外周には、肉厚であってゴム製の弾性部材38
が、角柱部37Aに圧入され固着されている。従って、
この弾性部材38が下外筒14に当接した際の衝撃を吸
収する緩衝材となる。
On the other hand, below the lower outer cylinder 14, a prism portion 37A of a mounting arm 37 which is a bracket formed of an iron casting or the like is disposed so as to face the bottom portion 14A, and one end of the mounting arm 37 is provided. The prismatic portion 37A located at the bottom
A flat portion 39 having a size corresponding to 4B is provided so as to face the bottom portion 14B. The prism 3 of this mounting arm 37
On the outer periphery of 7A, a thick rubber elastic member 38 is provided.
Are press-fitted and fixed to the prism portion 37A. Therefore,
The elastic member 38 serves as a cushioning material that absorbs an impact when the elastic member 38 comes into contact with the lower outer cylinder 14.

【0019】そして、角柱部37Aに形成されたボルト
孔21へ下方からボルト22を挿通し、このボルト22
を円筒部18の雌螺子40に螺合することにより、取付
アーム37がセンター部材17に固定される。また、取
付アーム37の他端部は、図示しない振動発生部となる
エンジンに連結される。
Then, the bolt 22 is inserted from below into the bolt hole 21 formed in the prism portion 37A.
Is screwed into the female screw 40 of the cylindrical portion 18 so that the mounting arm 37 is fixed to the center member 17. Further, the other end of the mounting arm 37 is connected to an engine which is a vibration generating unit (not shown).

【0020】一方、外筒11の内部には弾性体16に面
し、弾性体16の蓋板12側に受圧液室28が配設さ
れ、さらに受圧液室28の上部には副液室29が配設さ
れている。また、この受圧液室28と副液室29の間に
は、ゴム等の弾性変形可能な材料で作成された弾性膜体
であるメンブランゴム26が配設されている。そして、
外筒11の内周には、有底円筒状で薄肉膜状のゴム成形
体であるダイアフラム23が加硫接着され、ダイアフラ
ム23を介して受圧液室28と副液室29を隔離する隔
壁部材36が外筒11の内部へ挿入されている。この隔
壁部材36は仕切板部材24と仕切板部材24の筒部内
部に挿入される金具25及びメンブランゴム26とを備
え、仕切板部材24の下端部はかしめ部13へかしめ固
着され、仕切板部材24の筒部上端部は底部24Aとさ
れている。なお、金具25の筒部上端部には底部24A
に当接しない底部25Aを有している。また、隔壁部材
36で隔離されている受圧液室28及び副液室29に
は、水、シリコンオイル、エチレングリコール等の液体
が充填されている。さらに、仕切板部材24の底部24
Aの外周付近に金具25の底部25Aとの間に形成され
た制限通路30が形成されており、制限通路30には底
部24A側に透孔30Aと底部25A側に透孔30Bが
設けられ、透孔30Aは副液室29と、また透孔30B
は受圧液室28とそれぞれ連通している。
On the other hand, a pressure receiving liquid chamber 28 is disposed inside the outer cylinder 11 so as to face the elastic body 16, on the side of the cover plate 12 of the elastic body 16, and a sub liquid chamber 29 is provided above the pressure receiving liquid chamber 28. Are arranged. A membrane rubber 26, which is an elastic film made of an elastically deformable material such as rubber, is provided between the pressure receiving liquid chamber 28 and the sub liquid chamber 29. And
A diaphragm 23, which is a rubber molded body having a bottomed cylindrical shape and a thin film shape, is vulcanized and bonded to the inner periphery of the outer cylinder 11, and separates a pressure-receiving liquid chamber 28 and a sub-liquid chamber 29 through the diaphragm 23. 36 is inserted into the outer cylinder 11. The partition member 36 includes a partition plate member 24, a metal fitting 25 inserted into the inside of the cylindrical portion of the partition plate member 24, and a membrane rubber 26. The upper end of the cylindrical portion of the member 24 is a bottom 24A. Note that a bottom portion 24A is provided at the upper end of the cylindrical portion of the metal fitting 25.
Has a bottom portion 25A that does not abut. The pressure receiving liquid chamber 28 and the sub liquid chamber 29, which are separated by the partition member 36, are filled with a liquid such as water, silicone oil, and ethylene glycol. Further, the bottom 24 of the partition member 24
A restriction passage 30 formed between the outer periphery of A and the bottom 25A of the metal fitting 25 is formed. The restriction passage 30 has a through hole 30A on the bottom 24A side and a through hole 30B on the bottom 25A side, The through hole 30A is connected to the auxiliary liquid chamber 29 and the through hole 30B.
Are in communication with the pressure receiving liquid chamber 28, respectively.

【0021】金具25の底部25Aには凹部25Bが形
成され、この凹部25Bと仕切板部材24の底部24A
との間でメンブランゴム26の周囲を挟持している。こ
のメンブランゴム26は底部25Aの***部25Cに形
成された貫通孔25Dを通して受圧液室28に面してお
り、弾性変形により受圧液室の容積を拡縮可能としてい
る。一方、仕切板部材24の底部24Aには中央部に連
通孔形成面24Bが形成され、またメンブランゴム26
の中央部と間隔を有しているため、メンブランゴム26
の弾性変形を容易にしている。なお、メンブランゴム2
6の底面も***部25Cによって底部25Aと離れてお
り、これによってもメンブランゴム26の弾性変形が容
易になっている。
A recess 25B is formed in the bottom 25A of the metal fitting 25, and the recess 25B and the bottom 24A of the partition plate member 24 are formed.
And the periphery of the membrane rubber 26. The membrane rubber 26 faces the pressure receiving liquid chamber 28 through a through hole 25D formed in a raised portion 25C of the bottom 25A, and the volume of the pressure receiving liquid chamber can be expanded and contracted by elastic deformation. On the other hand, a communication hole forming surface 24B is formed in the center of the bottom 24A of the partition plate member 24, and the membrane rubber 26
Of the membrane rubber 26
Facilitates elastic deformation. In addition, the membrane rubber 2
The bottom surface of 6 is also separated from the bottom portion 25A by the raised portion 25C, which also facilitates the elastic deformation of the membrane rubber 26.

【0022】また、図2にも示されるように、仕切板部
材24の中央部の連通孔形成面24Bには、円形で所定
の開口面積を有する複数の連通孔24Cが設けられてお
り、ダイアフラム23の底部23Aの副液室29側には
ダイアフラム23と一体的に形成された複数の円形の凸
部32が設けられている。なお、この凸部32は連通孔
形成面24Bの連通孔24Cの近傍部分に当接し、連通
孔24Cには直接当接しない位置に設けられており、凸
部32の大きさは連通孔24Cと同等の径の円形又は同
等より小さい径の円形であることが望ましく、凸部32
の数は、連通孔24Cと同数あるいはそれ以上であるこ
とが望ましい。
As shown in FIG. 2, a plurality of circular communication holes 24C having a predetermined opening area are provided on the communication hole forming surface 24B at the center of the partition plate member 24. A plurality of circular protrusions 32 formed integrally with the diaphragm 23 are provided on the side of the sub-liquid chamber 29 on the bottom 23A of the 23. In addition, this convex part 32 is provided in the position which contact | abuts the vicinity of the communication hole 24C of the communication hole formation surface 24B, and does not directly contact the communication hole 24C, and the magnitude | size of the convex part 32 is set to the communication hole 24C. It is desirable that the circles have the same diameter or a smaller diameter.
Is desirably equal to or more than the communication hole 24C.

【0023】このような防振装置1の組立の際には、第
2外筒11Bとセンター部材17との間に弾性体16を
加硫接着し、液体中でこの第2外筒11Bを取付脚33
が固着された下外筒14の内側へ配置させると共に、外
筒11の内部へ加硫接着したダイアフラム23の内側へ
隔壁部材36を挿入し、プレス加工等により外筒11の
下端部を屈曲して下外筒14をかしめ固着する。センタ
ー部材17を構成する円筒部18の下部には、取付アー
ム37をボルト22によりねじ止めする。
When assembling the vibration isolator 1, the elastic body 16 is vulcanized and bonded between the second outer cylinder 11B and the center member 17, and the second outer cylinder 11B is attached in a liquid. Leg 33
Is arranged inside the lower outer cylinder 14 to which the outer cylinder 11 is fixed, and the partition member 36 is inserted into the inside of the diaphragm 23 that has been vulcanized and adhered to the inside of the outer cylinder 11, and the lower end of the outer cylinder 11 is bent by press working or the like. The lower outer cylinder 14 is caulked and fixed. The mounting arm 37 is screwed to the lower part of the cylindrical portion 18 constituting the center member 17 with the bolt 22.

【0024】なお、液体は、組み立て後に外筒11に液
体充填用の孔を設けて注入するようにしてもよい。
The liquid may be injected by providing a hole for liquid filling in the outer cylinder 11 after assembly.

【0025】本実施の形態では、防振装置1を取付脚3
3を図示しないボルトによって自動車の車体へ連結し、
取付アーム37を図示しない自動車のエンジンに連結す
る。この際、センター部材17がエンジンの荷重を受け
ると、弾性体16が圧縮変形され、センター部材17が
図1の位置より下方へ移動して、取付アーム37が下外
筒14の底部14Aから所定寸法離間する。そして、エ
ンジン振動が取付アーム37を介してセンター部材17
に伝達されると、弾性体16が変形して振動が減衰さ
れ、外筒11に連結される車体側に伝達される振動荷重
が小さくなる。さらに、受圧液室28、副液室29及び
制限通路30により下記のように作用する。
In this embodiment, the vibration isolator 1 is attached to the mounting leg 3.
3 is connected to the car body by a bolt (not shown),
The mounting arm 37 is connected to an automobile engine (not shown). At this time, when the center member 17 receives the load of the engine, the elastic body 16 is compressed and deformed, the center member 17 moves downward from the position in FIG. 1 and the mounting arm 37 moves from the bottom 14A of the lower outer cylinder 14 to a predetermined position. Dimensions are separated. Then, the engine vibration is transmitted to the center member 17 via the mounting arm 37.
The elastic body 16 is deformed to attenuate the vibration, and the vibration load transmitted to the vehicle body connected to the outer cylinder 11 is reduced. Further, the pressure receiving liquid chamber 28, the auxiliary liquid chamber 29, and the restriction passage 30 operate as follows.

【0026】例えば、エンジンから伝達される振動が低
周波大振幅振動であるときには、振動により弾性体16
が変形し受圧液室28が拡縮することによって、液体が
制限通路30を介して受圧液室28と副液室29との間
を行き来して液柱共振し、大きな減衰力を発生すること
により振動が吸収される。なお、受圧液室28が縮小す
る際、メンブランゴム26には受圧液室28が拡大する
際に比べ、より大きな液圧が加わり、メンブランゴム2
6はより大きく弾性変形しようとするが、メンブランゴ
ム26と副液室29との間には仕切板部材24の連通孔
形成面24Bが設けられているため、メンブランゴム2
6は連通孔形成面24Bに当接してその変形が規制され
る。従って、この際の制限通路30における液体の流動
が所定に確保される。
For example, when the vibration transmitted from the engine is a low frequency, large amplitude vibration,
Is deformed and the pressure receiving liquid chamber 28 expands and contracts, so that the liquid moves back and forth between the pressure receiving liquid chamber 28 and the auxiliary liquid chamber 29 via the restriction passage 30 to cause liquid column resonance, and a large damping force is generated. Vibration is absorbed. When the pressure receiving liquid chamber 28 contracts, a larger liquid pressure is applied to the membrane rubber 26 than when the pressure receiving liquid chamber 28 expands.
6 tends to be more elastically deformed, but since the communication hole forming surface 24B of the partition plate member 24 is provided between the membrane rubber 26 and the sub-liquid chamber 29, the membrane rubber 2
6 is in contact with the communication hole forming surface 24B, and its deformation is regulated. Therefore, the flow of the liquid in the restriction passage 30 at this time is secured to a predetermined value.

【0027】また、振動の周波数が上昇し高周波小振幅
振動が防振装置1に入力されるときには、制限通路30
は目詰まり状態となり動作せず、弾性体16の変形に伴
いメンブランゴム26が同方向に弾性変形することで振
動が吸収される。
When the frequency of vibration increases and high-frequency small-amplitude vibration is input to the vibration isolator 1, the restriction passage 30
Is in a clogged state and does not operate, and the vibration is absorbed by the elastic deformation of the membrane rubber 26 in the same direction as the elastic body 16 is deformed.

【0028】なお、特定周波数(本実施の形態では20
0ヘルツ)の振動入力時では、連通孔24Cの開口面積
及び仕切板部材24の厚みを予め所定に設定しておくこ
とで、液柱共振を惹起させ、さらに振動を減衰させるこ
とができる。
Note that a specific frequency (20 in this embodiment)
At the time of vibration input of 0 Hz, by setting the opening area of the communication hole 24C and the thickness of the partition plate member 24 to predetermined values, liquid column resonance can be induced and the vibration can be further attenuated.

【0029】さらに、エンジン側から大振幅振動が入力
された場合には、弾性部材38が取付アーム37の移動
に伴って下外筒14に当接する。このため、弾性部材3
8が衝撃を吸収しつつ取付アーム37の移動を規制し取
付アーム37の必要以上の下外筒14側への変位を制限
する。
Further, when large amplitude vibration is input from the engine side, the elastic member 38 comes into contact with the lower outer cylinder 14 as the mounting arm 37 moves. For this reason, the elastic member 3
8 restricts the movement of the mounting arm 37 to the lower outer cylinder 14 side more than necessary while absorbing the shock.

【0030】ところでこのような吊り下げ形式の防振装
置では、時間の経過により弾性体16のクリープが大き
くなり、これにより弾性体16に支持されたセンター部
材17が垂れ下がり、受圧液室28が広がった状態にな
る恐れがある。そしてこのような状態になると副液室2
9の液体は受圧液室28に移動し、副液室29が縮小さ
れ、これによってダイアフラム23は垂れ下がった状態
となり仕切板部材24の連通孔形成面24Bに密着し、
防振特性に悪影響を与える恐れがある。しかし、本実施
の形態では、ダイアフラム23の底部23Aの副液室2
9側に凸部32を設けたことにより、ダイアフラム23
が垂れ下がった状態でも連通孔形成面24Bの連通孔2
4Cの近傍に、連通孔24Cを閉塞することなく凸部3
2が当接する。つまり、ダイアフラム23の全体が連通
孔形成面24Bに貼り付くことなく、連通孔形成面24
Bとダイアフラム23の間には必ず凸部32で形成され
た隙間が確保される。従って、連通孔24Cが閉塞され
ることを防止でき、仕切板部材24とメンブランゴム2
6との間に形成される小液室と、副液室29との間で液
体の流出入が確実に確保でき、メンブランゴム26の弾
性変形が阻止されることがなく、時間が経過した防振装
置であっても振動の抑制が劣化することはない。
By the way, in such a suspension type vibration damping device, the creep of the elastic body 16 increases with time, whereby the center member 17 supported by the elastic body 16 hangs down, and the pressure receiving liquid chamber 28 expands. There is a danger that it will become a state. Then, in such a state, the sub liquid chamber 2
The liquid of No. 9 moves to the pressure receiving liquid chamber 28, and the auxiliary liquid chamber 29 is reduced, whereby the diaphragm 23 is in a hanging state and is in close contact with the communication hole forming surface 24B of the partition plate member 24,
There is a possibility that the anti-vibration characteristics may be adversely affected. However, in the present embodiment, the auxiliary liquid chamber 2 at the bottom 23A of the diaphragm 23 is provided.
By providing the convex portion 32 on the 9th side, the diaphragm 23
Communication hole 2 of communication hole forming surface 24B even when
In the vicinity of 4C, the protrusion 3 is formed without closing the communication hole 24C.
2 abuts. That is, the entire diaphragm 23 does not adhere to the communication hole forming surface 24B, and the communication hole forming surface 24
A gap formed by the projection 32 is always ensured between B and the diaphragm 23. Therefore, the communication hole 24C can be prevented from being closed, and the partition plate member 24 and the membrane rubber 2 can be prevented from closing.
6, the inflow and outflow of the liquid can be reliably ensured between the sub-liquid chamber 29 and the small liquid chamber formed between the small liquid chamber 6 and the elastic deformation of the membrane rubber 26. Even with a vibration device, the suppression of vibration does not deteriorate.

【0031】[0031]

【発明の効果】以上に述べたところから明らかなよう
に、本発明によれば、時間の経過によって弾性体のクリ
ープが大きくなっても防振装置の特性を確保できる防振
装置を提供できる。
As is apparent from the above description, according to the present invention, it is possible to provide a vibration isolator capable of securing the characteristics of the vibration isolator even if the creep of the elastic body increases with the passage of time.

【図面の簡単な説明】[Brief description of the drawings]

【図1】図1は本発明の実施の形態の防振装置の断面図
を示すものである。
FIG. 1 is a sectional view of a vibration isolator according to an embodiment of the present invention.

【図2】図2は本発明の実施の形態の防振装置の隔壁材
ブロックの一部平面図を示すものである。
FIG. 2 is a partial plan view of a partition wall block of the vibration isolator according to the embodiment of the present invention.

【図3】図3は従来の防振装置の断面図を示すものであ
る。
FIG. 3 is a sectional view of a conventional vibration isolator.

【符号の説明】[Explanation of symbols]

1 防振装置 11 外筒 11A 第1外筒 11B 第2外筒 12 蓋板 13 かしめ部 14 下外筒 14A 底部 15 円孔 16 弾性体 17 センター部材 18 円筒部 19 フランジ部 19A 底部 19B テーパ部 19C 平面部 21 ボルト孔 22 ボルト 23 ダイアフラム 23A 底部 24 仕切板部材 24A 底部 24B 連通孔形成面 24C 連通孔 25 金具 25A 底部 25B 凹部 25C ***部 25D 貫通孔 26 メンブランゴム 28 受圧液室 29 副液室 30 制限通路 30A、30B 透孔 32 凸部 33 取付脚 34 ボルト孔 35 弾性体ブロック 36 隔壁部材 37 取付アーム 37A 角柱部 38 弾性部材 39 平面部 40 雌螺子 DESCRIPTION OF SYMBOLS 1 Vibration isolator 11 Outer cylinder 11A 1st outer cylinder 11B 2nd outer cylinder 12 Cover plate 13 Caulking part 14 Lower outer cylinder 14A Bottom part 15 Round hole 16 Elastic body 17 Center member 18 Cylindrical part 19 Flange part 19A Bottom part 19B Tapered part 19C Flat part 21 Bolt hole 22 Bolt 23 Diaphragm 23A Bottom part 24 Partition plate member 24A Bottom part 24B Communication hole forming surface 24C Communication hole 25 Metal fitting 25A Bottom part 25B Concave part 25C Ridge part 25D Through hole 26 Membrane rubber 28 Restrictive liquid chamber 30 Sub pressure liquid chamber 29 Passageway 30A, 30B Through-hole 32 Convex part 33 Mounting leg 34 Bolt hole 35 Elastic block 36 Partition member 37 Mounting arm 37A Square pillar part 38 Elastic member 39 Flat part 40 Female screw

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 振動発生部及び振動受け部の一方に連結
される外筒部材と、少なくとも一端側が上記外筒部材の
内方に位置するように配設され、かつ上記外筒部材より
下方に垂下した他端側にて振動発生部及び振動受け部の
他方へ連結されるセンター部材と、上記外筒部材と上記
センター部材とを連結する弾性体と、上記弾性体に面
し、これより上方の上記外筒部材内部に配設される受圧
液室と、上記受圧液室より上方の上記外筒部材内部に配
設される副液室と、上記受圧液室と上記副液室との間に
配設されるメンブランゴムを有し、これら両液室を隔離
する隔壁部材と、上記メンブランゴムに対向して配置さ
れ上記副液室の隔壁の一部を構成する弾性薄膜からなる
ダイアフラムと、上記受圧液室と上記副液室とを連通す
る制限通路と、上記メンブランゴムと上記ダイアフラム
との間の上記副液室中に設けられ、上記副液室を上記メ
ンブランゴム側と上記ダイアフラム側とに区画すると共
に、これら両側の間を連通する連通孔を有する仕切板部
材とを備えた防振装置であって、上記ダイアフラムに上
記副液室側に突出する凸部を設け、この凸部にて上記連
通孔を閉塞することなく上記ダイアフラムを上記仕切板
部材に当接可能に構成したことを特徴とする防振装置。
An outer cylinder member connected to one of the vibration generating section and the vibration receiving section, at least one end of which is disposed inside the outer cylinder member, and is provided below the outer cylinder member; A center member connected to the other of the vibration generating unit and the vibration receiving unit at the other end of the hanging, an elastic body connecting the outer cylinder member and the center member, and an upper surface facing the elastic body; A pressure-receiving liquid chamber disposed inside the outer cylinder member, a sub-liquid chamber disposed inside the outer cylinder member above the pressure-receiving liquid chamber, and between the pressure-receiving liquid chamber and the sub-liquid chamber. Having a membrane rubber disposed in the, a partition member that separates these two liquid chambers, and a diaphragm made of an elastic thin film that is disposed to face the membrane rubber and constitutes a part of the partition of the sub liquid chamber, A restriction passage communicating the pressure receiving liquid chamber with the sub liquid chamber; A partition plate member provided in the sub-liquid chamber between the diaphragm rubber and the diaphragm to partition the sub-liquid chamber into the membrane rubber side and the diaphragm side, and having a communication hole communicating between both sides; Wherein the diaphragm is provided with a projection projecting toward the sub liquid chamber, and the diaphragm abuts on the partition plate member without closing the communication hole with the projection. An anti-vibration device characterized by being configured to be capable.
JP16796996A 1996-06-27 1996-06-27 Vibration isolating device Pending JPH109333A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16796996A JPH109333A (en) 1996-06-27 1996-06-27 Vibration isolating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16796996A JPH109333A (en) 1996-06-27 1996-06-27 Vibration isolating device

Publications (1)

Publication Number Publication Date
JPH109333A true JPH109333A (en) 1998-01-13

Family

ID=15859398

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16796996A Pending JPH109333A (en) 1996-06-27 1996-06-27 Vibration isolating device

Country Status (1)

Country Link
JP (1) JPH109333A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10267068A (en) * 1997-03-26 1998-10-06 Toyoda Gosei Co Ltd Fluid sealed vibration isolating device
WO2001094809A1 (en) * 2000-06-02 2001-12-13 Toyo Tire & Rubber Co., Ltd. Liquid seal type vibration isolator
WO2002016799A1 (en) * 2000-08-24 2002-02-28 Toyo Tire & Rubber Co., Ltd. Liquid-in vibration isolating device
WO2003001079A1 (en) * 2001-06-21 2003-01-03 Toyo Tire & Rubber Co., Ltd. Liquid-in vibration isolating device
EP1316741A1 (en) * 2001-11-28 2003-06-04 Toyo Tire & Rubber Co., Ltd . Liquid-sealed antivibration device
AU2002302060B9 (en) * 2002-03-25 2003-10-16 Hyundai Motor Company Vehicular engine mounting structure
KR101167289B1 (en) 2010-11-09 2012-07-23 주식회사 파브코 engin mount
KR101167290B1 (en) 2010-11-05 2012-07-23 주식회사 파브코 engin mount

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10267068A (en) * 1997-03-26 1998-10-06 Toyoda Gosei Co Ltd Fluid sealed vibration isolating device
WO2001094809A1 (en) * 2000-06-02 2001-12-13 Toyo Tire & Rubber Co., Ltd. Liquid seal type vibration isolator
US6648312B2 (en) 2000-06-02 2003-11-18 Toyo Tire & Rubber Co., Ltd. Liquid-sealed antivibration device
US6634628B2 (en) 2000-08-24 2003-10-21 Toyo Tire & Rubber Co., Ltd. Liquid filled vibration isolation device
WO2002016799A1 (en) * 2000-08-24 2002-02-28 Toyo Tire & Rubber Co., Ltd. Liquid-in vibration isolating device
EP1270992A3 (en) * 2001-06-21 2004-03-31 Toyo Tire & Rubber Co., Ltd . Liquid-filled vibration isolating device
US6523814B2 (en) 2001-06-21 2003-02-25 Toyo Tire & Rubber Co., Ltd Liquid filled vibration isolation device
WO2003001079A1 (en) * 2001-06-21 2003-01-03 Toyo Tire & Rubber Co., Ltd. Liquid-in vibration isolating device
EP1316741A1 (en) * 2001-11-28 2003-06-04 Toyo Tire & Rubber Co., Ltd . Liquid-sealed antivibration device
AU2002302060B9 (en) * 2002-03-25 2003-10-16 Hyundai Motor Company Vehicular engine mounting structure
AU2002302060B2 (en) * 2002-03-25 2004-07-01 Hyundai Motor Company Vehicular engine mounting structure
KR101167290B1 (en) 2010-11-05 2012-07-23 주식회사 파브코 engin mount
KR101167289B1 (en) 2010-11-09 2012-07-23 주식회사 파브코 engin mount

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