JPH04285339A - Vibration proof device - Google Patents
Vibration proof deviceInfo
- Publication number
- JPH04285339A JPH04285339A JP5165791A JP5165791A JPH04285339A JP H04285339 A JPH04285339 A JP H04285339A JP 5165791 A JP5165791 A JP 5165791A JP 5165791 A JP5165791 A JP 5165791A JP H04285339 A JPH04285339 A JP H04285339A
- Authority
- JP
- Japan
- Prior art keywords
- liquid chamber
- vibration
- sub
- liquid
- elastic body
- 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
Links
- 239000007788 liquid Substances 0.000 claims abstract description 130
- 238000005192 partition Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 6
- 239000012528 membrane Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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、エンジン等の振動発生
部からの振動を吸収する液体封入式の防振装置に関する
。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid-filled vibration isolator that absorbs vibrations from vibration-generating parts such as engines.
【0002】0002
【従来の技術】自動車のエンジンにはエンジンと車体と
の間にエンジンマウントとしての防振装置が配設されて
おり、エンジンの振動が車体に伝達されることを阻止す
るようになっている。エンジンの振動にはシエイク振動
(周波数15Hz未満の振動)、アイドル振動(周波数
20〜40Hz近傍の振動)、高周波振動(周波数80
Hz以上の振動)等があり、このような広範囲の周波数
の振動を吸収する防振装置として複数の液室を備えた液
体封入式の防振装置が提案されている(特開平2−42
226号公報、特開平2−42227号公報)。2. Description of the Related Art A vibration isolating device serving as an engine mount is disposed between the engine and the vehicle body of an automobile, and is designed to prevent engine vibrations from being transmitted to the vehicle body. Engine vibrations include shake vibration (vibration with a frequency of less than 15Hz), idle vibration (vibration with a frequency of around 20 to 40Hz), and high-frequency vibration (vibration with a frequency of 80Hz).
A liquid-filled vibration isolator equipped with multiple liquid chambers has been proposed as a vibration isolator that absorbs vibrations in a wide range of frequencies (Japanese Patent Laid-Open No. 2-42).
No. 226, Japanese Unexamined Patent Publication No. 2-42227).
【0003】この防振装置では、内筒の一方の片側に3
個の液室が層状に配置され、液室を互いに連結する連通
路は内筒の他方の片側に配置されているため内部構造が
複雑で製作が煩雑となっている。エンジンのアイドル振
動を効果的に吸収するためには、連通路を長くして液体
の通過抵抗及び液柱共振を大きくする必要があるが、こ
の防振装置では液室に干渉しないようにするためには連
通路の寸法を長くできず、液体の通過抵抗及び液柱共振
をあまり大きくすることができない。連通路を形成する
部材を別途取り付けて連通路の寸法を長くすることも考
えられるが、構造がさらに複雑となり製作が困難となる
。[0003] In this vibration isolator, there are three
The individual liquid chambers are arranged in layers, and the communication passage that connects the liquid chambers to each other is arranged on the other side of the inner cylinder, resulting in a complicated internal structure and complicated manufacturing. In order to effectively absorb the idle vibration of the engine, it is necessary to lengthen the communication path to increase the liquid passage resistance and liquid column resonance, but with this vibration isolator, it is necessary to prevent interference with the liquid chamber. In this case, the dimensions of the communicating path cannot be made long, and the liquid passage resistance and liquid column resonance cannot be increased too much. Although it is conceivable to lengthen the dimensions of the communication path by separately attaching a member that forms the communication path, the structure becomes even more complicated and manufacturing becomes difficult.
【0004】0004
【発明が解決しようとする課題】本発明は上記事実を考
慮し、液室を連結する連通路の寸法を長くして振動の吸
収作用を向上させることができ、しかも構造が簡単な防
振装置を得ることが目的である。SUMMARY OF THE INVENTION In view of the above-mentioned facts, the present invention provides a vibration isolating device which is capable of improving the vibration absorption effect by increasing the dimension of the communication passage connecting the liquid chambers, and which has a simple structure. The purpose is to obtain.
【0005】[0005]
【課題を解決するための手段】本発明の防振装置は、振
動発生部及び振動受部の一方へ連結される内筒と、振動
発生部及び振動受部の他方へ連結される外筒と、前記内
筒と前記外筒との間に設けられ振動発生時に変形する弾
性体と、前記弾性体を少なくとも隔壁の一部として拡縮
可能な複数の液室と、前記弾性体と前記外筒との間に配
置され前記液室を互いに連通する制限通路を備える防振
装置であって、前記液室を前記内筒のまわりに連設し、
前記制限通路を前記液室の軸線方向側方に並設したこと
を特徴としている。[Means for Solving the Problems] The vibration isolator of the present invention has an inner cylinder connected to one of the vibration generating part and the vibration receiving part, and an outer cylinder connected to the other of the vibration generating part and the vibration receiving part. , an elastic body provided between the inner tube and the outer tube and deformed when vibration occurs; a plurality of liquid chambers in which the elastic body can be expanded and contracted by using at least part of a partition wall; and the elastic body and the outer tube; A vibration isolator comprising a restriction passage disposed between the liquid chambers and communicating the liquid chambers with each other, the liquid chambers being arranged around the inner cylinder,
It is characterized in that the restriction passages are arranged side by side in the axial direction of the liquid chamber.
【0006】[0006]
【作用】本発明の防振装置では、例えば、外筒を振動受
部へ連結し、内筒を振動発生部へ連結すると、振動発生
部から伝達される振動は弾性体を介して外筒へ支持され
、弾性体の内部摩擦に基づく抵抗で振動が吸収されると
共に液室間を連結する制限通路を流れる液体の通過抵抗
または液柱共振によって振動が吸収される。また、制限
通路が連設された液室の側方に並設されているため、液
室同士を連結する連通路の接続部位を液室側方の互いに
最も離れた位置に設定することができ、長い連通路によ
って液体の通過抵抗または液柱共振作用を大きくするこ
とができる。さらに、液室と連通路が並設される構造の
ため内部構造が複雑にならない。[Operation] In the vibration isolating device of the present invention, for example, when the outer cylinder is connected to the vibration receiving part and the inner cylinder is connected to the vibration generating part, the vibration transmitted from the vibration generating part is transmitted to the outer cylinder through the elastic body. Vibration is absorbed by resistance based on internal friction of the supported elastic body, and vibration is also absorbed by passage resistance of the liquid flowing through the restricted passage connecting the liquid chambers or liquid column resonance. In addition, since the restriction passages are arranged side by side on the sides of the liquid chambers, the connecting parts of the communication passages that connect the liquid chambers can be set at the farthest positions on the sides of the liquid chambers. The long communication path can increase the liquid passage resistance or the liquid column resonance effect. Furthermore, since the liquid chamber and the communication passage are arranged in parallel, the internal structure is not complicated.
【0007】[0007]
【実施例】〔第1実施例〕本発明の第1実施例に係る防
振装置10を図1乃至図8にしたがって説明する。[Embodiments] [First Embodiment] A vibration isolating device 10 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 8.
【0008】図1に示すように、この防振装置10には
図示しない車体取付用とされる取付フレーム12が備え
られており、この取付フレーム12の環状部14に外筒
16が挿入されている。なお、この外筒16は環状部1
4の両端部が内側に絞り加工されることによって環状部
14に固定されている。As shown in FIG. 1, this vibration isolator 10 is equipped with a mounting frame 12 (not shown) for mounting on a vehicle body, and an outer cylinder 16 is inserted into an annular portion 14 of this mounting frame 12. There is. Note that this outer cylinder 16 is connected to the annular portion 1.
Both ends of 4 are fixed to the annular portion 14 by drawing inward.
【0009】図1及び図2に示すように、外筒16には
、上側に一対の矩形孔18が形成されており、下側に一
対の小矩形孔20が形成されている。また、外筒16の
内周面には薄肉ゴム層22が加硫接着されており、この
薄肉ゴム層22は矩形孔18に対応した部分が各々内方
に突出してダイヤフラム24を形成し、小矩形孔20に
対応した部分が内方に突出してメンブラン(膜)26を
形成している。なお、メンブラン26はダイヤフラム2
4よりも厚く形成されており、剛性が高くされている。As shown in FIGS. 1 and 2, the outer cylinder 16 has a pair of rectangular holes 18 formed on its upper side, and a pair of small rectangular holes 20 formed on its lower side. Further, a thin rubber layer 22 is vulcanized and bonded to the inner peripheral surface of the outer cylinder 16, and portions of this thin rubber layer 22 corresponding to the rectangular holes 18 protrude inward to form a diaphragm 24, and a small A portion corresponding to the rectangular hole 20 projects inward to form a membrane 26. Note that the membrane 26 is the diaphragm 2.
It is formed thicker than 4 and has high rigidity.
【0010】外筒16の内側には中間筒28が同軸的に
配置されている。この中間筒28は鋼板で形成されてお
り、図3A及びBに示すように、断面略コ字状に形成さ
れた一対のリングが略半円弧状の連結板で互いに連結さ
れている。An intermediate cylinder 28 is disposed coaxially inside the outer cylinder 16. The intermediate cylinder 28 is made of a steel plate, and as shown in FIGS. 3A and 3B, a pair of rings each having a substantially U-shaped cross section are connected to each other by a substantially semicircular connecting plate.
【0011】図4に示すように、中間筒28には弾性体
30が加硫接着されており、この弾性体30の略中央部
には軸芯に沿って内筒31が配置されている。なお、こ
の中間筒28は外筒16の両端部が内側に絞り加工され
ることによって外筒16に固定されている。As shown in FIG. 4, an elastic body 30 is vulcanized and bonded to the intermediate cylinder 28, and an inner cylinder 31 is disposed approximately at the center of the elastic body 30 along the axis. The intermediate cylinder 28 is fixed to the outer cylinder 16 by drawing both ends of the outer cylinder 16 inward.
【0012】弾性体30には、内筒31の下側でかつ軸
線方向中間部に凹部34が形成されており、この凹部3
4と外筒16とによって受圧液室36が形成されている
。図5に示すように、凹部34の底面35は軸直角断面
が略円弧状に形成されている。A recess 34 is formed in the elastic body 30 at the lower side of the inner cylinder 31 and at the middle part in the axial direction.
4 and the outer cylinder 16 form a pressure receiving liquid chamber 36. As shown in FIG. 5, the bottom surface 35 of the recess 34 has a substantially arc-shaped cross section perpendicular to the axis.
【0013】受圧液室36には、ゴム等の弾性体で形成
された可動体64が配設されている。この可動体64は
、可動部65と可動部65の下部から延設された一対の
支持脚66とから構成されている。可動部65は軸線に
沿った方向から見て、上面が凹部34の底面35に対応
した形状にされており、凹部34の側壁37に接近する
にしたがって、底面35から徐々に離間するように形成
されている。また、支持脚66の先端部は凹部34の開
口部近傍に形成された凹部68に挿入固定されている。
可動部65は支持脚66の付勢力によって凹部34の底
面35側に付勢されており、可動部65の上面中央部が
底面35に軽く押圧されている。また、図5に示すよう
に、可動部65は軸線方向両側面が凹部34の側壁39
から所定寸法離間されている。A movable body 64 made of an elastic material such as rubber is disposed in the pressure receiving liquid chamber 36 . The movable body 64 includes a movable part 65 and a pair of support legs 66 extending from the lower part of the movable part 65. The upper surface of the movable portion 65 has a shape corresponding to the bottom surface 35 of the recess 34 when viewed from the direction along the axis, and is formed so as to gradually separate from the bottom surface 35 as it approaches the side wall 37 of the recess 34. has been done. Further, the tip of the support leg 66 is inserted and fixed into a recess 68 formed near the opening of the recess 34. The movable portion 65 is biased toward the bottom surface 35 of the recess 34 by the biasing force of the support legs 66, and the center portion of the top surface of the movable portion 65 is lightly pressed against the bottom surface 35. Further, as shown in FIG. 5, the movable part 65 has side walls 39 of the recess 34 on both sides in the axial direction.
It is spaced a predetermined distance from.
【0014】一方、弾性体30の上側には、図5に示す
ように軸線方向中間部に周方向に長く延びる凹部38が
形成されており、この凹部38と外筒16及びダイヤフ
ラム24に囲まれて第1副液室40が形成されている。
また、ダイヤフラム24と外筒16との間の空間部は空
気室とされている。この空気室は取付フレーム12の環
状部14に孔(図示せず)を形成して外部と連通しても
よい。On the other hand, on the upper side of the elastic body 30, as shown in FIG. A first sub-liquid chamber 40 is formed therein. Further, the space between the diaphragm 24 and the outer cylinder 16 is an air chamber. This air chamber may be communicated with the outside by forming a hole (not shown) in the annular portion 14 of the mounting frame 12.
【0015】さらに、弾性体30には、外周に凹部34
と凹部38との間に左右一対の小凹部42が形成されて
おり、図5右側(図5矢印B方向側)の小凹部42と外
筒16及びメンブラン26に囲まれて第2副液室44が
形成され、図5左側(図5矢印A方向側)の小凹部42
と外筒16とによってダミー液室46が形成されている
。また、メンブラン26と外筒16との間の空間部は空
気室とされ、取付フレーム12の環状部14に孔(図示
せず)を形成して外部と連通してもよい。Furthermore, the elastic body 30 has a recess 34 on the outer periphery.
A pair of left and right small recesses 42 are formed between the recess 38 and the recess 38, and a second sub-liquid chamber is formed between the small recess 42 on the right side in FIG. 44 is formed, and a small recess 42 on the left side of FIG. 5 (in the direction of arrow A in FIG. 5)
A dummy liquid chamber 46 is formed by the outer cylinder 16 and the outer cylinder 16 . Further, the space between the membrane 26 and the outer tube 16 may be an air chamber, and a hole (not shown) may be formed in the annular portion 14 of the mounting frame 12 to communicate with the outside.
【0016】図6に示すように、凹部34、凹部38及
び小凹部42の軸線方向両側には中間筒28のリングに
よって環状溝48、50が形成されており、これらの環
状溝48、50は外筒16で閉塞されることによって外
部と遮断されており図6左側(図6矢印C方向側)が第
1連通路52、図6右側(図6矢印D方向側)が第2連
通路54とされている。As shown in FIG. 6, annular grooves 48, 50 are formed on both sides of the recess 34, recess 38, and small recess 42 in the axial direction by rings of the intermediate cylinder 28, and these annular grooves 48, 50 They are blocked from the outside by being closed by the outer cylinder 16, and the left side in FIG. 6 (in the direction of arrow C in FIG. 6) is the first communication path 52, and the right side in FIG. 6 (in the direction of arrow D in FIG. 6) is the second communication path 54. It is said that
【0017】図7に示すように、第1連通路52は弾性
体30によって一部が閉塞されて軸線直角断面がC字状
をしており、一方の端部が受圧液室36の第2副液室4
4側端部に形成された孔56によって受圧液室36と連
通しており、他方の端部が第1副液室40の第2副液室
44側端部に形成された孔58によって第1副液室40
と連通している。As shown in FIG. 7, the first communication passage 52 is partially closed by the elastic body 30 and has a C-shaped cross section perpendicular to the axis, with one end connected to the second part of the pressure-receiving liquid chamber 36. Sub-liquid chamber 4
The other end communicates with the pressure-receiving liquid chamber 36 through a hole 56 formed at the end of the first sub-liquid chamber 40 and the second sub-liquid chamber 44 . 1 sub-liquid chamber 40
It communicates with
【0018】図8に示すように、第2連通路54は弾性
体30によって一部が閉塞されて軸線直角断面がC字状
をしており、一方の端部が受圧液室36の第2副液室4
4側端部に形成された孔60によって受圧液室36と連
通しており、他方の端部が第2副液室44の受圧液室3
6側端部に形成された孔62によって第2副液室44と
連通している。As shown in FIG. 8, the second communication passage 54 is partially closed by the elastic body 30 and has a C-shaped cross section perpendicular to the axis, with one end connected to the second communication passage 54 of the pressure-receiving liquid chamber 36. Sub-liquid chamber 4
The hole 60 formed at the fourth side end communicates with the pressure receiving liquid chamber 36, and the other end communicates with the pressure receiving liquid chamber 36 of the second sub liquid chamber 44.
It communicates with the second sub-liquid chamber 44 through a hole 62 formed at the 6th side end.
【0019】なお、これらの受圧液室36、第1副液室
44、第2副液室44、第1連通路52及び第2連通路
54には水またはオイル等の液体が充填されている。Note that these pressure receiving liquid chamber 36, first sub-liquid chamber 44, second sub-liquid chamber 44, first communication passage 52, and second communication passage 54 are filled with liquid such as water or oil. .
【0020】次に、第1実施例の作用を説明する。Next, the operation of the first embodiment will be explained.
【0021】フレーム12を図示しない車体へ取り付け
、内筒31を図示しないエンジンに連結すると、エンジ
ンの振動は内筒31、弾性体30、外筒16、フレーム
12を介して図示しない車体へ支持される。このとき、
弾性体30が弾性変形して内部摩擦に基づく減衰作用に
よりエンジンの振動が吸収される。When the frame 12 is attached to a vehicle body (not shown) and the inner cylinder 31 is connected to an engine (not shown), the vibrations of the engine are supported by the vehicle body (not shown) via the inner cylinder 31, the elastic body 30, the outer cylinder 16, and the frame 12. Ru. At this time,
The elastic body 30 is elastically deformed and engine vibrations are absorbed by a damping effect based on internal friction.
【0022】エンジンの振動が比較的低周波の場合には
(一例として周波数15Hz未満、振幅±1mm程度の
シエイク振動)、受圧液室36内の液体が第1連通路5
2を介して第1副液室44と行き来する。このとき、第
2副液室44のメンブラン26はほとんど変形すること
はなく、第2副液室44の体積変化は少なく第2連通路
54内を液体は流れない。これは第2副液室44のメン
ブラン26が第1副液室40のダイヤフラム24がより
も剛性が高いためである。したがって、液体の第1連通
路52内での通過抵抗または液柱共振によってシエイク
振動が吸収される。When the vibration of the engine is relatively low frequency (for example, shake vibration with a frequency of less than 15 Hz and an amplitude of about ±1 mm), the liquid in the pressure receiving liquid chamber 36 flows into the first communication path 5.
2 to and from the first sub-liquid chamber 44. At this time, the membrane 26 of the second sub-liquid chamber 44 hardly deforms, and the volume of the second sub-liquid chamber 44 changes little, and no liquid flows through the second communication path 54. This is because the membrane 26 of the second sub-liquid chamber 44 has higher rigidity than the diaphragm 24 of the first sub-liquid chamber 40. Therefore, the shake vibration is absorbed by the passage resistance of the liquid in the first communicating path 52 or by the liquid column resonance.
【0023】エンジンの振動周波数が少し高くなると(
一例として20〜40Hzのアイドル振動)第1連通路
52は目詰まり状態となる。したがって、受圧液室36
の液体は第2連通路54を通ってメンブラン26を変形
させ、受圧液室36と第2副液室44とを行き来する。
液体の第2連通路54内での通過抵抗または液柱共振に
よってアイドル振動が吸収される。When the vibration frequency of the engine becomes a little higher (
For example, if the idle vibration is from 20 to 40 Hz, the first communication passage 52 becomes clogged. Therefore, the pressure receiving liquid chamber 36
The liquid passes through the second communication path 54, deforms the membrane 26, and flows back and forth between the pressure-receiving liquid chamber 36 and the second sub-liquid chamber 44. The idle vibration is absorbed by the passage resistance of the liquid in the second communication path 54 or by liquid column resonance.
【0024】さらにエンジンの振動周波数が高くなると
(一例として、こもり音の原因となる80Hz以上の高
周波振動)、第2連通路54も目詰まり状態となるが、
可動体64と受圧液室36の内壁の間で液体が共振する
ことによって高周波域での動倍率が低下する。Furthermore, when the vibration frequency of the engine becomes higher (for example, high frequency vibration of 80 Hz or more that causes muffled noise), the second communication passage 54 also becomes clogged.
When the liquid resonates between the movable body 64 and the inner wall of the pressure-receiving liquid chamber 36, the dynamic magnification in the high frequency range decreases.
【0025】このように、2つの液室同士を連通路で連
結する際に、この連通路が他の液室によって干渉される
ことがない。また、液室の側方に連通路が配置されてい
るため、2つの液室の最も寸法的に離間した部位に連通
路を接続することができるため、従来に比較して少なく
とも液室の長さに相当する寸法は連通路を長くすること
ができる。このため、連通路内での液体の通過抵抗及び
共振を大きくすることができ、従来の防振装置に比較し
てシエイク振動及びアイドル振動を効果的に吸収するこ
とができる。また、弾性体30の外周部側に受圧液室3
6、第1副液室40、第1副液室44、第1連通路52
及び第2連通路54が全て配置されているため構造が簡
単で製作も容易である。[0025] In this way, when two liquid chambers are connected to each other by a communication passage, this communication passage is not interfered with by other liquid chambers. In addition, since the communication path is arranged on the side of the liquid chamber, it is possible to connect the communication path to the part of the two liquid chambers that is the most dimensionally apart from each other. Dimensions corresponding to this can lengthen the communication path. Therefore, the passage resistance and resonance of the liquid in the communication path can be increased, and shake vibrations and idle vibrations can be absorbed more effectively than conventional vibration isolators. Further, a pressure receiving liquid chamber 3 is provided on the outer peripheral side of the elastic body 30.
6. First sub-liquid chamber 40, first sub-liquid chamber 44, first communication passage 52
and the second communicating path 54 are all arranged, so the structure is simple and manufacturing is easy.
【0026】〔第2実施例〕本発明の第2実施例に係る
防振装置10を図9乃至図10にしたがって説明する。
なお、第1実施例と同一構成に関しては、同一符号を付
しその説明を省略する。[Second Embodiment] A vibration isolating device 10 according to a second embodiment of the present invention will be explained with reference to FIGS. 9 and 10. Note that the same components as those in the first embodiment are given the same reference numerals and their explanations will be omitted.
【0027】図9に示すように、第2実施例の第2連通
路70は軸線直角断面がC字状をしており、図9及び図
10に示すように一方の端部が第2副液室44の第1副
液室40側端部に形成された孔72によって第2副液室
44と連通しており、他方の端部が第1副液室40の第
2副液室44側端部に形成された孔74によって第1副
液室40と連通している。As shown in FIG. 9, the second communication passage 70 of the second embodiment has a C-shaped cross section perpendicular to the axis, and one end is connected to the second sub-section as shown in FIGS. 9 and 10. The liquid chamber 44 communicates with the second sub-liquid chamber 44 through a hole 72 formed at the end thereof on the side of the first sub-liquid chamber 40 , and the other end communicates with the second sub-liquid chamber 44 of the first sub-liquid chamber 40 . It communicates with the first sub-liquid chamber 40 through a hole 74 formed at the side end.
【0028】すなわち、第2実施例の防振10では、受
圧液室36内の液体は第2連通路54、第2副液室44
、第1連通路52を順に介して第1副液室40に連通し
ている。That is, in the vibration isolator 10 of the second embodiment, the liquid in the pressure receiving liquid chamber 36 flows through the second communication passage 54 and the second auxiliary liquid chamber 44.
, are connected to the first sub-liquid chamber 40 via the first communication passage 52 in this order.
【0029】次に、第2実施例の作用を説明する。Next, the operation of the second embodiment will be explained.
【0030】エンジンの振動が比較的低周波の場合には
(一例として周波数15Hz未満、振幅±1mm程度の
シエイク振動)、振動による受圧液室36の圧力上昇に
よって受圧液室36内の液体が第2連通路54、第2副
液室44、第1連通路52を介して第1副液室40と行
き来する。液体の受圧液室36と第1副液室40との間
の通過抵抗または液柱共振によってシエイク振動が吸収
される。また、受圧液室36から第1副液室40までの
寸法が長いため第1実施例の防振装置10に比較してシ
エイク振動の減衰効果が大きい。When the vibration of the engine is relatively low frequency (for example, shake vibration with a frequency of less than 15 Hz and an amplitude of approximately ±1 mm), the pressure in the pressure receiving liquid chamber 36 increases due to the vibration, causing the liquid in the pressure receiving liquid chamber 36 to It goes back and forth with the first auxiliary liquid chamber 40 via the two communication passage 54, the second auxiliary liquid chamber 44, and the first communication passage 52. The shake vibration is absorbed by the passage resistance or liquid column resonance between the pressure-receiving liquid chamber 36 and the first sub-liquid chamber 40 . Furthermore, since the dimension from the pressure receiving liquid chamber 36 to the first sub-liquid chamber 40 is long, the damping effect of shake vibration is greater than that of the vibration isolator 10 of the first embodiment.
【0031】エンジンの振動周波数が少し高くなると(
一例として20〜40Hzのアイドル振動)第1連通路
52は目詰まり状態となるが、受圧液室36の液体は第
2連通路54を介して第2副液室44と行き来する。液
体の第2連通路54内での通過抵抗または液柱共振によ
ってアイドル振動が吸収される。When the vibration frequency of the engine becomes a little higher (
Although the first communication passage 52 (for example, idle vibration of 20 to 40 Hz) becomes clogged, the liquid in the pressure-receiving liquid chamber 36 flows back and forth to the second sub-liquid chamber 44 via the second communication passage 54. The idle vibration is absorbed by the passage resistance of the liquid in the second communication path 54 or by liquid column resonance.
【0032】さらにエンジンの振動周波数が高くなると
(一例として、こもり音の原因となる80Hz以上の高
周波振動)、第2連通路54も目詰まり状態となるが、
受圧液室36内の液体が可動体64と受圧液室36の内
壁の間で行き来することによって高周波域での動倍率が
低下する。Furthermore, when the vibration frequency of the engine becomes higher (for example, high frequency vibration of 80 Hz or more that causes muffled noise), the second communication passage 54 also becomes clogged.
As the liquid in the pressure-receiving liquid chamber 36 moves back and forth between the movable body 64 and the inner wall of the pressure-receiving liquid chamber 36, the dynamic magnification in the high frequency range decreases.
【0033】なお、第1連通路52及び第2連通路54
の断面積を可変して液柱共振の特性をチユーニングする
ことも可能である。Note that the first communicating path 52 and the second communicating path 54
It is also possible to tune the characteristics of liquid column resonance by varying the cross-sectional area of the liquid column.
【0034】また、本実施例では受圧液室36に可動体
64を配設し高周波域での動倍率を低下させる構成とし
たが、本発明はこれに限らず、振動板等の他の高周波吸
収手段を設ける構成としてもよい。In addition, in this embodiment, the movable body 64 is disposed in the pressure receiving liquid chamber 36 to reduce the dynamic magnification in the high frequency range, but the present invention is not limited to this, and the present invention A structure may also be provided in which an absorption means is provided.
【0035】[0035]
【発明の効果】本発明の防振装置は上記構成としたので
、構造が簡単で連通路の寸法を長くして振動の吸収作用
を向上させることができる優れた効果を有する。Since the vibration isolating device of the present invention has the above structure, it has a simple structure and has the excellent effect of increasing the dimension of the communicating path and improving the vibration absorption effect.
【図1】本発明の第1実施例に係る防振装置を示す分解
斜視図である。FIG. 1 is an exploded perspective view showing a vibration isolator according to a first embodiment of the present invention.
【図2】本発明の第1実施例に係る防振装置の外筒及び
薄肉ゴム層を示し、図1のII−II線断図である。FIG. 2 is a sectional view taken along the line II-II in FIG. 1, showing an outer cylinder and a thin rubber layer of the vibration isolator according to the first embodiment of the present invention.
【図3】本発明の第1実施例に係る防振装置の中間筒を
示し、Aは図3BのIIIA−IIIA線断図、Bは図
3AのIIIB−IIIB線断図である。3 shows an intermediate cylinder of the vibration isolator according to the first embodiment of the present invention, where A is a cross-sectional view taken along line IIIA-IIIA in FIG. 3B, and B is a cross-sectional view taken along line IIIB-IIIB in FIG. 3A.
【図4】本発明の第1実施例に係る防振装置を示し、図
5のIV−IV線断図である。4 shows a vibration isolator according to a first embodiment of the present invention, and is a cross-sectional view taken along the line IV-IV in FIG. 5. FIG.
【図5】本発明の第1実施例に係る防振装置を示し、図
4のV −V 線断図である。5 shows a vibration isolator according to a first embodiment of the present invention, and is a cross-sectional view taken along the line V-V in FIG. 4. FIG.
【図6】本発明の第1実施例に係る防振装置を示し、図
4に相当する一部断面図である。FIG. 6 is a partial sectional view corresponding to FIG. 4, showing a vibration isolating device according to a first embodiment of the present invention.
【図7】本発明の第1実施例に係る防振装置を示し、図
6のVII −VII 線断図である。7 shows a vibration isolator according to a first embodiment of the present invention, and is a sectional view taken along the line VII-VII in FIG. 6. FIG.
【図8】本発明の第1実施例に係る防振装置を示し、図
6のVIII−VIII線断図である。8 shows a vibration isolator according to a first embodiment of the present invention, and is a sectional view taken along the line VIII-VIII in FIG. 6. FIG.
【図9】本発明の第2実施例に係る防振装置を示し、図
10のIX−IX線断図である。9 shows a vibration isolator according to a second embodiment of the present invention, and is a sectional view taken along the line IX-IX in FIG. 10. FIG.
【図10】本発明の第2実施例に係る防振装置を示す一
部断面図である。FIG. 10 is a partial cross-sectional view showing a vibration isolator according to a second embodiment of the present invention.
10 防振装置 16 外筒 30 弾性体 31 内筒 36 受圧液室(液室) 40 第1副液室(液室) 44 第2副液室(液室) 52 第1連通路(制限通路) 54 第2連通路(制限通路) 70 第2連通路(制限通路) 10 Vibration isolation device 16 Outer cylinder 30 Elastic body 31 Inner cylinder 36 Pressure receiving liquid chamber (liquid chamber) 40 First sub-liquid chamber (liquid chamber) 44 Second sub-liquid chamber (liquid chamber) 52 First communication passage (restricted passage) 54 Second communication passage (restricted passage) 70 Second communication passage (restricted passage)
Claims (1)
される内筒と、振動発生部及び振動受部の他方へ連結さ
れる外筒と、前記内筒と前記外筒との間に設けられ振動
発生時に変形する弾性体と、前記弾性体を少なくとも隔
壁の一部として拡縮可能な複数の液室と、前記弾性体と
前記外筒との間に配置され前記液室を互いに連通する制
限通路と、を備える防振装置であって、前記液室を前記
内筒のまわりに連設し、前記制限通路を前記液室の軸線
方向側方に並設したことを特徴とした防振装置。1. An inner cylinder connected to one of the vibration generating part and the vibration receiving part, an outer cylinder connected to the other of the vibration generating part and the vibration receiving part, and between the inner cylinder and the outer cylinder. an elastic body that is provided and deforms when vibration occurs; a plurality of liquid chambers that are expandable and contractible using the elastic body as at least part of a partition wall; and a plurality of liquid chambers that are disposed between the elastic body and the outer cylinder and communicate the liquid chambers with each other. A vibration isolator comprising a restriction passage, wherein the liquid chamber is arranged in succession around the inner cylinder, and the restriction passage is arranged side by side in the axial direction of the liquid chamber. Device.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5165791A JPH04285339A (en) | 1991-03-15 | 1991-03-15 | Vibration proof device |
US07/851,008 US5344126A (en) | 1991-03-15 | 1992-03-11 | Vibration isolation apparatus |
DE69217260T DE69217260T2 (en) | 1991-03-15 | 1992-03-13 | Vibration isolation device |
EP92104334A EP0503654B1 (en) | 1991-03-15 | 1992-03-13 | Vibration isolation apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5165791A JPH04285339A (en) | 1991-03-15 | 1991-03-15 | Vibration proof device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04285339A true JPH04285339A (en) | 1992-10-09 |
Family
ID=12892953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5165791A Pending JPH04285339A (en) | 1991-03-15 | 1991-03-15 | Vibration proof device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04285339A (en) |
-
1991
- 1991-03-15 JP JP5165791A patent/JPH04285339A/en active Pending
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