JPH04272535A - Liquid sealing type vibration isolating device - Google Patents
Liquid sealing type vibration isolating deviceInfo
- Publication number
- JPH04272535A JPH04272535A JP3467691A JP3467691A JPH04272535A JP H04272535 A JPH04272535 A JP H04272535A JP 3467691 A JP3467691 A JP 3467691A JP 3467691 A JP3467691 A JP 3467691A JP H04272535 A JPH04272535 A JP H04272535A
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- outer cylinder
- openings
- liquid
- air passage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 30
- 238000007789 sealing Methods 0.000 title claims abstract description 7
- 239000000463 material Substances 0.000 claims description 10
- 230000006866 deterioration Effects 0.000 abstract description 5
- 230000002093 peripheral effect Effects 0.000 abstract description 5
- 238000009423 ventilation Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
Landscapes
- Combined Devices Of Dampers And Springs (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、自動車のエンジンマウ
ント等として用いられる防振装置、とりわけ内部にシリ
コンオイル等の液体が封入された液体封入型防振装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator used as an engine mount for an automobile, and more particularly to a liquid-filled vibration isolator in which a liquid such as silicone oil is sealed.
【０００２】0002
【従来の技術】この種の液体封入型防振装置して、図５
〜図７に示すようなものがある。[Prior Art] This type of liquid-filled vibration isolator is shown in FIG.
- There are some as shown in Fig. 7.
【０００３】この防振装置は、車体等に取り付けられる
内筒１と、エンジン等にブラケット２を介して取り付け
られる外筒３の間に吸振用のゴム材４を介装する一方で
、外筒３の内部にダイヤフラム５を付設し、このゴム材
４とダイヤフラム５に挟まれた部位に、オリフィス６を
備えた液体封入室７を形成して、ゴム材４による吸振作
用と、液体封入室７内の液体がオリフィス６を通過する
際の減衰作用とによって振動の伝達を防止するようにし
ている。また、前記ダイヤフラム５の外側には液体封入
室７に隣接して空気室８が形成され、外筒３には、ブラ
ケット２に形成された通気孔９とこの空気室８を連通さ
せるエア通路としての貫通孔１０が形成されており、液
体封入室７の変形に伴って空気室８の容積が変化すると
、この変化した分のエアが貫通孔１０と通気孔９を出入
りするようになっている。尚、同図中１１ａ，１１ｂは
ダイヤフラム５を外筒３に付設する関係上、外筒３に形
成した開口部である。This vibration isolator has a vibration absorbing rubber material 4 interposed between an inner cylinder 1 that is attached to a vehicle body or the like and an outer cylinder 3 that is attached to an engine or the like via a bracket 2. A diaphragm 5 is attached to the inside of the rubber member 4, and a liquid chamber 7 with an orifice 6 is formed between the rubber member 4 and the diaphragm 5. Transmission of vibrations is prevented by a damping effect when the liquid inside passes through the orifice 6. Further, an air chamber 8 is formed on the outside of the diaphragm 5 adjacent to the liquid sealing chamber 7, and an air passageway is formed in the outer cylinder 3 to communicate the air chamber 8 with a vent hole 9 formed in the bracket 2. A through hole 10 is formed, and when the volume of the air chamber 8 changes due to the deformation of the liquid chamber 7, the changed amount of air flows in and out of the through hole 10 and the ventilation hole 9. . Note that 11a and 11b in the figure are openings formed in the outer cylinder 3 in order to attach the diaphragm 5 to the outer cylinder 3.
【０００４】尚、この類似構造は特開平１−３２０３４
３号公報等に示されている。[0004]This similar structure is disclosed in Japanese Patent Application Laid-Open No. 1-32034.
This is shown in Publication No. 3, etc.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上述した従来
の液体封入型防振装置の場合、振動の入力によってダイ
ヤフラム５が大きく変形すると、図８に示すように、ダ
イヤフラム５の外側（空気室８側）の面が貫通孔１０の
周縁の角部に接触して、ダイヤフラム５の劣化を招くお
それがある。However, in the case of the conventional liquid-filled vibration damping device described above, when the diaphragm 5 is greatly deformed due to vibration input, the outside of the diaphragm 5 (the air chamber 8 There is a risk that the surface of the diaphragm 5 may come into contact with the corner of the periphery of the through hole 10, leading to deterioration of the diaphragm 5.
【０００６】そこで本発明は、液体封入室を構成するダ
イヤフラムの劣化を防止して耐久性の高い液体封入型防
振装置を提供しようとするものである。SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a highly durable liquid-filled vibration damping device that prevents deterioration of the diaphragm constituting the liquid-filled chamber.
【０００７】[0007]
【課題を解決するための手段】本発明は上述した課題を
解決するための手段として、外筒の内部にダイヤフラム
が付設され、外筒内に嵌合された吸振用のゴム材とこの
ダイヤフラムによって液体封入室が形成される一方、ダ
イヤフラムの外側に液体封入室に隣接する空気室が形成
され、この空気室が外筒を保持するブラケットの通気孔
に対しエア通路を介して連通する液体封入型防振装置に
おいて、外筒に二つの開口部を形成し、両開口部に夫々
ダイヤフラムを付設すると共に、この両開口部の間に位
置される外筒の橋部を内径方向に変形させ、この橋部の
変形部位とブラケットの内周面との隙間を前記エア通路
とした。[Means for Solving the Problems] As a means for solving the above-mentioned problems, the present invention has a diaphragm attached to the inside of the outer cylinder, and a vibration-absorbing rubber material fitted inside the outer cylinder and the diaphragm. A liquid-filled type in which a liquid-filled chamber is formed, and an air chamber adjacent to the liquid-filled chamber is formed on the outside of the diaphragm, and this air chamber communicates via an air passage with a vent hole in a bracket that holds the outer cylinder. In the vibration isolator, two openings are formed in the outer cylinder, a diaphragm is attached to each of the openings, and a bridge part of the outer cylinder located between the two openings is deformed in the inner diameter direction. The gap between the deformed portion of the bridge portion and the inner peripheral surface of the bracket was defined as the air passage.
【０００８】[0008]
【作用】両ダイヤフラムは外筒のほぼ径方向に向かって
変形するが、エア通路は橋部の変形部位とブラケットの
内周面との隙間によって構成されているため、エア通路
とダイヤフラムの変形方向は略直角になる。[Operation] Both diaphragms deform in the approximately radial direction of the outer cylinder, but since the air passage is formed by the gap between the deformed part of the bridge and the inner peripheral surface of the bracket, the direction of deformation between the air passage and the diaphragm is becomes almost a right angle.
【０００９】[0009]
【実施例】次に、本発明の一実施例を図１〜図４に基づ
いて説明する。尚、図５〜図８に示したものと同一部分
には同一符号を用いるものとする。[Embodiment] Next, an embodiment of the present invention will be described based on FIGS. 1 to 4. Note that the same reference numerals are used for the same parts as those shown in FIGS. 5 to 8.
【００１０】図１〜図４において、１は、車体等に図示
しないロッドを介して取り付けられる内筒であり、３は
、エンジン等の取付部材にブラケット２を介して取り付
けられる外筒である。そして、内筒１と外筒３の間には
吸振用のゴム材４が介装されている。In FIGS. 1 to 4, 1 is an inner cylinder that is attached to a vehicle body or the like via a rod (not shown), and 3 is an outer tube that is attached to a mounting member such as an engine via a bracket 2. A rubber material 4 for vibration absorption is interposed between the inner cylinder 1 and the outer cylinder 3.
【００１１】ゴム材４は内筒１の外周に加硫接着され、
その外周面の一部には液体封入室７を構成する凹部１２
が形成されている。凹部１２には液体封入室７を上下二
つの部屋に画成する仕切板１３が渡設されており、この
仕切板１３の一端は外筒３の内周面に密接されるように
なっている。１４は、ゴム材４に軸方向に沿って形成さ
れた空洞部である。A rubber material 4 is vulcanized and bonded to the outer periphery of the inner cylinder 1.
A recess 12 constituting a liquid sealing chamber 7 is formed in a part of its outer peripheral surface.
is formed. A partition plate 13 is provided in the recess 12 to divide the liquid chamber 7 into two upper and lower chambers, and one end of this partition plate 13 is brought into close contact with the inner circumferential surface of the outer cylinder 3. . 14 is a cavity formed in the rubber material 4 along the axial direction.
【００１２】１５は、ゴム材４の外周面に加硫接着され
た筒金であり、この筒金１５は、ゴム材４の両端部外周
を被い前記凹部１２を被わないように外周面の一部が窓
状に切欠かれている。また、１６は、筒金１５の軸方向
中央にその周面に沿って形成されたオリフィスであり、
液体封入室７の上下の二つの部屋をこのオリフィス６に
よって連通するようになっている。Reference numeral 15 denotes a cylindrical metal vulcanized and bonded to the outer peripheral surface of the rubber material 4. A part of it is cut out in the shape of a window. Further, 16 is an orifice formed in the axial center of the barrel metal 15 along its circumferential surface,
The two upper and lower chambers of the liquid chamber 7 are communicated with each other through the orifice 6.
【００１３】外筒３には、その周面方向に沿って二つの
開口部１１ａ，１１ｂが設けられると共に、これらの開
口部１１ａ，１１ｂを閉塞するように夫々ダイヤフラム
５ａ，５ｂが付設されている。このダイヤフラム５ａ，
５ｂはゴム材４の凹部１２と共に液体封入室７を構成す
るものであって、通常状態においては、各開口部１１ａ
，１１ｂ部分で外筒３の内側方向に半球状にたわんでお
り、振動（外筒３の下方変位）によって液体封入室７の
下側の部屋が圧縮され、その内部の液体Ｌがオリフィス
６を通って上側の部屋に流入すると、外側方向（開口部
１１ａ，１１ｂ方向）に膨出変形して上側の部屋の液体
量の増加を許容する。また、図中１６は、外筒３の開口
部１１ａ，１１ｂの間に位置される橋部であり、この橋
部１６の中央部は外筒３の内径方向に撓み変形している
。以下、この部分を変形部位１７と呼ぶ。The outer cylinder 3 is provided with two openings 11a and 11b along its circumferential direction, and diaphragms 5a and 5b are respectively attached to close these openings 11a and 11b. . This diaphragm 5a,
5b constitutes the liquid sealing chamber 7 together with the recess 12 of the rubber material 4, and in the normal state, each opening 11a
, 11b are bent in a hemispherical shape toward the inside of the outer cylinder 3, and the lower chamber of the liquid sealing chamber 7 is compressed by the vibration (downward displacement of the outer cylinder 3), and the liquid L inside it is bent into the orifice 6. When the liquid passes through the liquid and flows into the upper chamber, it bulges and deforms outward (towards the openings 11a and 11b), allowing an increase in the amount of liquid in the upper chamber. Further, reference numeral 16 in the figure is a bridge portion located between the openings 11a and 11b of the outer cylinder 3, and the center portion of this bridge portion 16 is deformed in the direction of the inner diameter of the outer cylinder 3. Hereinafter, this portion will be referred to as the deformed portion 17.
【００１４】外筒３はゴム材４の外周に嵌合した状態で
その両端が筒金１５にかしめられ、さらにその状態でブ
ラケット２に嵌着されている。この状態において、ダイ
ヤフラム５ａ，５ｂの外側には液体封入室７に隣接する
空気室８が形成されている。The outer tube 3 is fitted onto the outer periphery of the rubber material 4, and both ends of the outer tube 3 are caulked to the cylindrical metal 15, and in this state, the outer tube 3 is fitted onto the bracket 2. In this state, an air chamber 8 adjacent to the liquid chamber 7 is formed outside the diaphragms 5a, 5b.
【００１５】また、９は、ブラケット２にその内外面を
貫通するように形成された通気孔であり、この通気孔９
は、橋部１６の変形部位１７とブラケット２の内周面と
の隙間によって構成されるエア通路１８を介して空気室
８と連通している。このため、振動の入力によって液体
封入室７が変形し、これに伴って空気室８の容積が変化
すると、この空気室８のエアはエア通路１８と通気孔９
を介して出入りする。尚、外筒３の橋部１６の幅は通気
孔９の径よりも大きくなるように設定されている。Further, reference numeral 9 denotes a ventilation hole formed in the bracket 2 so as to penetrate through its inner and outer surfaces.
communicates with the air chamber 8 via an air passage 18 formed by a gap between the deformed portion 17 of the bridge portion 16 and the inner circumferential surface of the bracket 2 . Therefore, when the liquid chamber 7 is deformed by the input of vibration and the volume of the air chamber 8 changes accordingly, the air in the air chamber 8 is transferred to the air passage 18 and the ventilation hole 9.
Enter and exit via. Note that the width of the bridge portion 16 of the outer cylinder 3 is set to be larger than the diameter of the ventilation hole 9.
【００１６】この防振装置の場合、両ダイヤフラム５ａ
，５ｂはほぼ外筒３の径方向に変形するが、エア通路１
８は外筒３の略接線方向に向いているため、ダイヤフラ
ム５ａ，５ｂがエア通路１８の周縁の角部に接触して、
劣化を生じるような不具合は起こらない。In the case of this vibration isolator, both diaphragms 5a
, 5b are deformed almost in the radial direction of the outer cylinder 3, but the air passage 1
8 is oriented substantially tangentially to the outer cylinder 3, so that the diaphragms 5a and 5b come into contact with the corner of the periphery of the air passage 18,
No defects that would cause deterioration occur.
【００１７】[0017]
【発明の効果】以上のように本発明は、外筒に二つの開
口部を形成し、両開口部に夫々ダイヤフラムを付設する
と共に、この両開口部の間に位置される外筒の橋部を内
径方向に変形させ、この橋部の変形部位とブラケットの
内周面との隙間を前記エア通路としたため、エア通路と
ダイヤフラムの変形方向が略直角になり、ダイヤフラム
がエア通路部分に接触しなくなる。このため、ダイヤフ
ラムの劣化がなくなり、耐久性が向上する。As described above, the present invention forms two openings in the outer cylinder, attaches a diaphragm to each of the openings, and provides a bridge portion of the outer cylinder located between the two openings. is deformed in the inner radial direction, and the gap between the deformed portion of the bridge portion and the inner circumferential surface of the bracket is used as the air passage, so that the deformation direction of the air passage and the diaphragm becomes approximately perpendicular, and the diaphragm comes into contact with the air passage portion. It disappears. This eliminates deterioration of the diaphragm and improves durability.
【図１】本発明の一実施例を示す断面図。FIG. 1 is a sectional view showing one embodiment of the present invention.
【図２】図１のＡ−Ａ線に沿う断面図。FIG. 2 is a sectional view taken along line A-A in FIG. 1.
【図３】同実施例の側面図。FIG. 3 is a side view of the same embodiment.
【図４】同実施例の外筒を示す斜視図。FIG. 4 is a perspective view showing the outer cylinder of the same embodiment.
【図５】従来の技術を示す断面図。FIG. 5 is a sectional view showing a conventional technique.
【図６】図５のＢ−Ｂ線に沿う断面図。FIG. 6 is a sectional view taken along line BB in FIG. 5;
【図７】従来の技術を示す斜視図。FIG. 7 is a perspective view showing a conventional technique.
【図８】図６の一部拡大断面図。FIG. 8 is a partially enlarged sectional view of FIG. 6;
２…ブラケット、３…外筒、４…ゴム材、５ａ，５ｂ…
ダイヤフラム、７…液体封入室、８…空気室、９…通気
孔、１１ａ，１１ｂ…開口部、１６…橋部、１７…変形
部位、１８…エア通路。2...Bracket, 3...Outer cylinder, 4...Rubber material, 5a, 5b...
Diaphragm, 7...Liquid enclosure chamber, 8...Air chamber, 9...Vent hole, 11a, 11b...Opening, 16...Bridge portion, 17...Deformation site, 18...Air passage.
Claims (1)
、外筒内に嵌合された吸振用のゴム材とこのダイヤフラ
ムによって液体封入室が形成される一方、ダイヤフラム
の外側に液体封入室に隣接する空気室が形成され、この
空気室が外筒を保持するブラケットの通気孔に対しエア
通路を介して連通する液体封入型防振装置において、外
筒に二つの開口部を形成し、両開口部に夫々ダイヤフラ
ムを付設すると共に、この両開口部の間に位置される外
筒の橋部を内径方向に変形させ、この橋部の変形部位と
ブラケットの内周面との隙間を前記エア通路としたこと
を特徴とする液体封入型防振装置。Claim 1: A diaphragm is attached to the inside of the outer cylinder, and a liquid sealing chamber is formed by the vibration-absorbing rubber material fitted inside the outer cylinder and the diaphragm. In a liquid-filled vibration isolator, an air chamber is formed in which the air chamber communicates with a vent hole in a bracket that holds the outer cylinder through an air passage, and two openings are formed in the outer cylinder. A diaphragm is attached to each of the openings, and a bridge portion of the outer cylinder located between the two openings is deformed in the radial direction, and a gap between the deformed portion of the bridge portion and the inner circumferential surface of the bracket is formed into the air passage. A liquid-filled vibration isolator characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3467691A JPH0786376B2 (en) | 1991-02-28 | 1991-02-28 | Liquid-filled anti-vibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3467691A JPH0786376B2 (en) | 1991-02-28 | 1991-02-28 | Liquid-filled anti-vibration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04272535A true JPH04272535A (en) | 1992-09-29 |
| JPH0786376B2 JPH0786376B2 (en) | 1995-09-20 |
Family
ID=12421030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3467691A Expired - Fee Related JPH0786376B2 (en) | 1991-02-28 | 1991-02-28 | Liquid-filled anti-vibration device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0786376B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100569445B1 (en) * | 2004-06-12 | 2006-04-07 | 현대자동차주식회사 | An insulator of mounting device in automobile |
-
1991
- 1991-02-28 JP JP3467691A patent/JPH0786376B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100569445B1 (en) * | 2004-06-12 | 2006-04-07 | 현대자동차주식회사 | An insulator of mounting device in automobile |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0786376B2 (en) | 1995-09-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |