JP2001241489A - Vibration isolating device and method of charging it with liquid - Google Patents
Vibration isolating device and method of charging it with liquidInfo
- Publication number
- JP2001241489A JP2001241489A JP2000049991A JP2000049991A JP2001241489A JP 2001241489 A JP2001241489 A JP 2001241489A JP 2000049991 A JP2000049991 A JP 2000049991A JP 2000049991 A JP2000049991 A JP 2000049991A JP 2001241489 A JP2001241489 A JP 2001241489A
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- Japan
- Prior art keywords
- liquid chamber
- liquid
- sub
- pressure
- vibration
- 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.)
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- Combined Devices Of Dampers And Springs (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自動車、建設機
械、一般産業用機械等へ適用され、エンジン等の振動発
生部から車体等の振動受部へ伝達される振動を抑制する
液体封入式の防振装置及び、この液体封入式の防振装の
液室空間内へ液体を充填するための防振装置への液体充
填方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to an automobile, a construction machine, a general industrial machine, and the like, and is a liquid-filled type for suppressing a vibration transmitted from a vibration generating unit such as an engine to a vibration receiving unit such as a vehicle body. The present invention relates to an anti-vibration device and a method of filling the anti-vibration device with a liquid for filling a liquid into a liquid chamber space of the liquid-filled type anti-vibration device.
【０００２】[0002]
【従来の技術】例えば、車両の振動発生部となるエンジ
ンと振動受部となる車体との間にはエンジンマウントと
しての防振装置が配設されており、この防振装置はエン
ジンが発生する振動を吸収し、車体側に伝達される振動
を抑制する。このような防振装置としては、例えば、振
動発生部からの振動を受けて変形する弾性体と、この弾
性体を内壁の一部とする受圧液室と、この受圧液室と制
限通路を介して連通すると共に隔壁の一部がダイアフラ
ムにより構成された副液室とを備えた、所謂、液体封入
式のものが知られている。この液体封入式の防振装置を
車両のエンジンマウントとして適用した場合には、エン
ジンの作動時にエンジンからの振動により弾性体が変形
すると共に、受圧液室と副液室との間に制限通路を通し
て液体が相互に流動する現象である液柱共振が生じる。
これにより、防振装置へ入力したエンジン振動は弾性体
の内部摩擦に基づく吸振作用及び液体の粘性抵抗等によ
り吸収されるので、車体へ伝達されるエンジン振動を効
果的に抑制できる。2. Description of the Related Art For example, an anti-vibration device as an engine mount is provided between an engine serving as a vibration generating portion of a vehicle and a vehicle body serving as a vibration receiving portion. The anti-vibration device generates an engine. Absorbs vibration and suppresses vibration transmitted to the vehicle body. As such a vibration isolator, for example, an elastic body deformed by receiving a vibration from a vibration generating unit, a pressure-receiving liquid chamber having the elastic body as a part of an inner wall, and a pressure-receiving liquid chamber and a restriction passage are provided. A so-called liquid-filled type is known, which is provided with a sub-liquid chamber in which a part of a partition wall is constituted by a diaphragm. When this liquid-filled type vibration damping device is applied as an engine mount of a vehicle, the elastic body is deformed by the vibration from the engine when the engine is operated, and the restriction passage is provided between the pressure receiving liquid chamber and the auxiliary liquid chamber. Liquid column resonance, which is a phenomenon in which liquids flow mutually, occurs.
Thus, the engine vibration input to the vibration isolator is absorbed by the vibration absorbing action based on the internal friction of the elastic body, the viscous resistance of the liquid, and the like, so that the engine vibration transmitted to the vehicle body can be effectively suppressed.
【０００３】上記のような液体封入式の防振装置を組み
立てる際には、通常、組立の最終工程として受圧液室、
制限通路及び副液室からなる液室空間内へ水、オイル、
グリセリン等の液体が真空注入法により充填封入され
る。この真空注入法の液体充填工程では、先ず、装置の
外殻部から受圧液室内へ貫通した液体注入路の外殻部側
の端部に圧力配管を介して真空ポンプ及び給液容器を接
続する。ここで、圧力配管の途中には切換弁が配置され
ており、この切換弁により液体注入路の連通先を真空ポ
ンプ及び給液容器の何れかに切換可能になっている。ま
た給液容器内には防振装置へ供給するための液体が貯え
られている。When assembling the above-described liquid-filled type vibration damping device, the pressure receiving liquid chamber,
The water, oil,
A liquid such as glycerin is filled and sealed by a vacuum injection method. In the liquid filling step of the vacuum injection method, first, a vacuum pump and a liquid supply container are connected via a pressure pipe to an end on the outer shell side of a liquid injection passage penetrating from the outer shell of the device into the pressure receiving liquid chamber. . Here, a switching valve is arranged in the middle of the pressure pipe, and the communication destination of the liquid injection path can be switched to one of the vacuum pump and the liquid supply container by the switching valve. Further, a liquid to be supplied to the vibration isolator is stored in the liquid supply container.
【０００４】この後、切換弁により真空ポンプを液体注
入路へ連通させて真空ポンプを作動させ、真空ポンプに
より受圧液室、制限通路及び副液室からなる液室空間内
が所定の真空度に達するまで液室空間内の空気を装置外
部へ排気し、液室空間内が所定の真空度に達したなら
ば、切換弁により給液容器を液体注入路へ連通させる。
これにより、給液容器内の液体が液室空間内の真空（負
圧）の作用により液室空間内へ吸入されて、受圧液室、
制限通路及び副液室にそれぞれ液体が充填封入される。Thereafter, the vacuum pump is operated by connecting the vacuum pump to the liquid injection path by the switching valve, and the inside of the liquid chamber space including the pressure receiving liquid chamber, the restriction passage, and the auxiliary liquid chamber is brought to a predetermined degree of vacuum by the vacuum pump. The air in the liquid chamber space is exhausted to the outside of the apparatus until the pressure reaches the predetermined value. When the inside of the liquid chamber space reaches a predetermined degree of vacuum, the liquid supply container is connected to the liquid injection path by the switching valve.
Thereby, the liquid in the liquid supply container is sucked into the liquid chamber space by the action of the vacuum (negative pressure) in the liquid chamber space, and the pressure receiving liquid chamber,
Liquid is filled and sealed in the restriction passage and the sub liquid chamber, respectively.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記の
ような真空注入法による液体充填工程では、真空ポンプ
により受圧液室、制限通路及び副液室からなる液室空間
内を減圧する際に、副液室内の内部気圧が所定の真空度
に達する前に、すなわち副液室内の空気が十分抜けてい
ない状態で、ダイアフラムが副液室の内壁部へ開口する
制限通路の開口端部付近に吸着され、ダイアフラムによ
り制限通路が閉止されてしまったり、制限通路に連通す
る隙間が他の隙間から切り離されてしまうことがある。
この結果、副液室内にはダイアフラムとその内壁部との
間に空気が含まれた隙間できるので、このような状態
で、給液容器を液体注入路に連通させて給液容器から液
室空間内へ液体を吸入させても、副液室内へ隙間なく液
体を充填封入できなくなって液室空間内に空気が残って
しまう。このとき、液室空間内に僅かでも空気が残って
いると、この空気が液室空間内の圧力変化により容易に
圧縮又は膨張することから、受圧液室と副液室との間の
液柱共振が抑制されると共に、防振装置全体としてのば
ね定数が設計値よりも小さくなり、この結果、防振能力
が大幅に低下してしまう。However, in the liquid filling step by the above-described vacuum injection method, when the inside of the liquid chamber space including the pressure receiving liquid chamber, the restriction passage, and the sub liquid chamber is depressurized by the vacuum pump, the auxiliary pressure is reduced. Before the internal pressure of the liquid chamber reaches a predetermined degree of vacuum, that is, in a state where the air in the sub liquid chamber has not sufficiently escaped, the diaphragm is adsorbed near the opening end of the restriction passage opening to the inner wall of the sub liquid chamber. In some cases, the restriction passage may be closed by the diaphragm, or the gap communicating with the restriction passage may be cut off from other gaps.
As a result, a gap containing air is formed between the diaphragm and the inner wall portion in the sub-liquid chamber. In such a state, the liquid supply container is communicated with the liquid injection path and the liquid supply space is separated from the liquid supply container. Even if the liquid is sucked into the sub liquid chamber, the liquid cannot be filled and sealed into the sub liquid chamber without any gap, and air remains in the liquid chamber space. At this time, if even a small amount of air remains in the liquid chamber space, this air is easily compressed or expanded due to a change in pressure in the liquid chamber space, so that the liquid column between the pressure receiving liquid chamber and the sub liquid chamber Resonance is suppressed, and the spring constant of the whole vibration isolator becomes smaller than a design value. As a result, the vibration isolating performance is greatly reduced.
【０００６】本発明の目的は、上記事実を考慮し、真空
注入法により副液室内へ液体を供給する際に、制限通路
を通して副液室内を確実に減圧し、副液室内に空気が残
らないように液体を充填できる防振装置及び防振装置へ
の液体充填方法に関するものである。In view of the above, an object of the present invention is to surely reduce the pressure in the sub-liquid chamber through the restriction passage when supplying the liquid into the sub-liquid chamber by the vacuum injection method, so that no air remains in the sub-liquid chamber. The present invention relates to an anti-vibration device capable of filling a liquid as described above and a method of filling the anti-vibration device with a liquid.
【０００７】[0007]
【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に連結される第１の取付部
材と、振動発生部及び振動受部の他方に連結される第２
の取付部材と、前記第１の取付部材と前記第２の取付部
材との間に配置されて振動発生部からの振動により変形
する弾性体と、隔壁の少なくとも一部が前記弾性体によ
り形成され、液体が封入される受圧液室と、前記受圧液
室に隣接して設けられ、液体が封入される副液室と、前
記受圧液室と前記副液室とを互いに液体が流通可能とな
るように連通させる制限通路と、前記受圧液室と前記副
液室との間に配置されて受圧液室と副液室とを区画する
隔壁の少なくとも一部を構成する仕切部材と、前記副液
室の隔壁の一部を構成し、前記仕切部材に対向するよう
に配置されたダイアフラムと、前記仕切部材における前
記副液室内へ面した受圧面に設けられ、前記制限通路を
通して前記副液室内が減圧され、前記仕切部材へ前記ダ
イアフラムの一部が密着した場合に、前記ダイアフラム
の他の一部と前記副液室の内壁部との間に生じる隙間を
前記制限通路へ連通させる負圧導入路と、を有するもの
である。A vibration isolator according to the present invention is connected to a first mounting member connected to one of a vibration generator and a vibration receiver, and connected to the other of the vibration generator and the vibration receiver. Second
A mounting member, an elastic body disposed between the first mounting member and the second mounting member and deformed by vibration from a vibration generating unit, and at least a part of a partition wall is formed by the elastic body. A pressure-receiving liquid chamber in which liquid is sealed, a sub-liquid chamber provided adjacent to the pressure-receiving liquid chamber, and in which liquid is sealed, and allowing the liquid to flow through the pressure-receiving liquid chamber and the sub-liquid chamber. And a partition member that is arranged between the pressure receiving liquid chamber and the sub liquid chamber and that constitutes at least a part of a partition wall that partitions the pressure receiving liquid chamber and the sub liquid chamber, and the sub liquid. A part of a partition of the chamber, a diaphragm disposed so as to face the partition member, provided on a pressure-receiving surface of the partition member facing the sub-liquid chamber, the sub-liquid chamber through the restriction passage. The pressure is reduced and a part of the diaphragm is moved to the partition member. When the close contact, and has a negative pressure introducing passage for communicating to said restricted passage gap formed between the inner wall portion of the auxiliary fluid chamber and another part of said diaphragm.
【０００８】上記構成の防振装置によれば、仕切部材に
おける副液室内へ面した受圧面に負圧導入路が設けら、
制限通路を通して副液室内が減圧され、ダイアフラムの
一部が仕切部材へ密着した場合に、前記負圧導入路がダ
イアフラムの他の一部と副液室の内壁部との間に生じる
隙間を制限通路へ連通させることにより、制限通路を通
して副液室内を減圧、すなわち制限通路を通して副液室
内の空気を排気する際に、副液室内の気圧が低下すると
共にダイアフラムが副液室の容積縮小方向へ変形し、ダ
イアフラムの一部のみが副液室の内壁部へ密着し、ダイ
アフラムの他の一部と副液室の内壁部との間に隙間がで
きた場合でも、この隙間を負圧導入路により制限通路へ
連通できるので、制限通路を通して副液室内の空気を所
要の真空度が得られるまで確実に減圧（排気）できるよ
うになる。従って、所要の真空度まで減圧された副液室
へ制限通路を通して液体を供給すれば、液体供給時に副
液室内から空気を排気したり液体を加圧したりすること
なく、副液室内へ空気が残らないように液体を充填でき
る。According to the vibration damping device having the above-described structure, the pressure-receiving surface of the partition member facing the sub-liquid chamber is provided with the negative pressure introduction path.
When the pressure in the sub-liquid chamber is reduced through the restriction passage and a part of the diaphragm comes into close contact with the partition member, the negative pressure introduction path restricts a gap generated between another part of the diaphragm and the inner wall of the sub-liquid chamber. By communicating with the passage, the pressure in the sub-liquid chamber is reduced through the restriction passage, that is, when the air in the sub-liquid chamber is exhausted through the restriction passage, the pressure in the sub-liquid chamber decreases and the diaphragm moves in the direction of reducing the volume of the sub-liquid chamber. Even if the diaphragm is deformed and only a part of the diaphragm adheres to the inner wall of the sub liquid chamber, and a gap is formed between the other part of the diaphragm and the inner wall of the sub liquid chamber, the gap is formed through the negative pressure introduction path. Thus, the air in the sub liquid chamber can be reliably reduced (exhausted) through the restriction passage until the required degree of vacuum is obtained. Therefore, if the liquid is supplied through the restriction passage to the sub-liquid chamber depressurized to the required degree of vacuum, the air flows into the sub-liquid chamber without exhausting the air from the sub-liquid chamber or pressurizing the liquid during liquid supply. Liquid can be filled so that it does not remain.
【０００９】ここで、仕切部材の副液室へ面した受圧面
に副液室内へ突出するように設けられた複数の突起部を
設け、この複数の突起部の間に形成される凹状の溝部を
負圧導入路とすることが可能である。この場合には、例
えば、複数の突起部を仕切部材の一部として一体的に成
形すればよいので、装置の部品点数を増やすことなく、
副液室内に負圧導入路を設けることができる。A plurality of projections are provided on the pressure-receiving surface of the partition member facing the sub-liquid chamber so as to protrude into the sub-liquid chamber, and a concave groove formed between the plurality of projections is provided. Can be used as a negative pressure introduction path. In this case, for example, since the plurality of protrusions may be integrally formed as a part of the partition member, without increasing the number of parts of the apparatus,
A negative pressure introduction path can be provided in the sub liquid chamber.
【００１０】さらに負圧導入路が設けられる仕切部材
を、受圧液室と副液室との容積拡縮方向へ弾性的に変形
可能とされ、受圧液室及び副液室内の液圧変化に応じて
容積拡縮方向へ変形する弾性隔壁、所謂、メンブランと
してもよい。仕切部材をメンブランとすることにより、
例えば、大振幅の振動が入力した場合でも受圧液室内の
過大な液圧上昇を防止することができるので、動ばね定
数の上昇に伴う大振幅の振動に対する減衰能力の低下を
抑制できる。Further, the partition member provided with the negative pressure introduction passage can be elastically deformed in the direction of volume expansion and contraction between the pressure receiving liquid chamber and the sub-liquid chamber, and responds to changes in the liquid pressure in the pressure receiving liquid chamber and the sub-liquid chamber. An elastic partition wall that deforms in the volume expansion / contraction direction, that is, a so-called membrane may be used. By making the partition member a membrane,
For example, even when a large-amplitude vibration is input, an excessive increase in the hydraulic pressure in the pressure-receiving liquid chamber can be prevented, so that a decrease in the damping ability with respect to the large-amplitude vibration accompanying an increase in the dynamic spring constant can be suppressed.
【００１１】また、本発明の防振装置への液体充填方法
は、上記構成のように構成された防振装置における副液
室へ液体を充填するための液体充填方法であって、前記
受圧液室に接続された負圧発生源により前記制限通路を
通して前記副液室内を減圧した後、前記受圧液室に液体
供給源を接続して該液体供給源から前記制限通路を通し
て前記副液室内に液体を供給するものである。Further, the method of filling a vibration isolator with a liquid according to the present invention is a liquid filling method for filling a sub-liquid chamber with a liquid in the vibration isolator having the above-mentioned structure, After the pressure in the sub liquid chamber is reduced through the restriction passage by the negative pressure generation source connected to the chamber, a liquid supply source is connected to the pressure receiving liquid chamber, and the liquid is supplied from the liquid supply source into the sub liquid chamber through the restriction passage. Is to supply.
【００１２】上記構成の防振装置への液体充填方法によ
れば、負圧発生源を制限通路へ間接的又は直接的に接続
し、この負圧発生源により制限通路を通して副液室内を
減圧、する際に、副液室内の気圧が低下すると共にダイ
アフラムが副液室の容積縮小方向へ変形し、ダイアフラ
ムの一部のみが副液室の内壁部へ密着し、ダイアフラム
の他の一部と副液室の内壁部との間に隙間ができた場合
でも、この隙間を負圧導入路により制限通路へ連通でき
るので、負圧発生源により制限通路を通して副液室内の
空気を所要の真空度が得られるまで確実に減圧（排気）
できるようになる。この後、所要の真空度まで減圧され
た副液室へ液体供給源から制限通路を通して液体を供給
すれば、液体供給時に副液室内から空気を排気したり液
体を加圧したりすることなく、副液室内へ空気が残らな
いように液体を充填できる。According to the method of filling the vibration isolator with the liquid having the above-described configuration, the negative pressure source is connected indirectly or directly to the restriction passage, and the negative pressure source reduces the pressure in the sub-liquid chamber through the restriction passage. At the same time, the pressure in the sub-liquid chamber is reduced, and the diaphragm is deformed in the direction in which the volume of the sub-liquid chamber is reduced. Even if a gap is formed between the inner wall of the liquid chamber and the gap, the gap can be communicated with the restriction passage through the negative pressure introduction path. Depressurization (exhaust) surely until obtained
become able to. Thereafter, if the liquid is supplied from the liquid supply source through the restriction passage to the sub-liquid chamber decompressed to the required degree of vacuum, the sub-liquid chamber does not exhaust air or pressurize the liquid during liquid supply without discharging air. The liquid can be filled so that no air remains in the liquid chamber.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態に係る
防振装置を図面に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vibration isolator according to an embodiment of the present invention will be described below with reference to the drawings.
【００１４】（実施形態の構成）図１及び図２には、そ
れぞれ本発明の実施の形態に係る液体封入式の防振装置
が示されており、図中の符号Ｓは防振装置の中心線であ
る軸心を示し、この軸心に沿った方向を装置の軸方向と
して以下の説明を行う。(Structure of Embodiment) FIGS. 1 and 2 show a liquid-filled type vibration damping device according to an embodiment of the present invention. An axis which is a line is shown, and a direction along this axis will be described below as an axial direction of the apparatus.
【００１５】防振装置１０には、図１に示されるように
上端部に平板状の頂板金具１２が配置されており、この
頂板金具１２の上面には、軸心Ｓに対して外周側にボル
ト１４及びピン１６がそれぞれ固着されている。頂板金
具１２の下面には、下方へ向かって外径が広がるような
略円錐台状とされたゴム製の弾性体１８の頂面が加硫接
着されている。また頂板金具１２には軸心Ｓに沿って貫
通穴２０が穿設されており、この貫通穴２０の上端部に
は貫通穴２０より大径とされた凹状の座ぐり部２２が形
成されている。As shown in FIG. 1, a flat top metal fitting 12 is disposed at the upper end of the vibration isolator 10, and an upper surface of the top metal fitting 12 is provided on the outer peripheral side with respect to the axis S. The bolt 14 and the pin 16 are fixed respectively. On the lower surface of the top plate fitting 12, a top surface of a rubber elastic body 18 having a substantially truncated cone shape whose outer diameter is widened downward is vulcanized and bonded. A through hole 20 is formed in the top plate 12 along the axis S, and a concave counterbore 22 having a diameter larger than that of the through hole 20 is formed at an upper end of the through hole 20. I have.
【００１６】弾性体１８の下端部には、図1に示される
ように略円筒状とされた樹脂製の支持円筒２４の上端部
が連結されている。支持円筒２４には、その円筒部３０
の外周面からそれぞれ径方向へ延出する板状とされた一
対の脚部２６が一体的に形成されている。一対の脚部２
６にはそれぞれ厚さ方向へ貫通する円形の開口部が形成
されており、これらの開口部内にはそれぞれリング状の
インサート金具２８が埋設固定されている。As shown in FIG. 1, the lower end of the elastic body 18 is connected to an upper end of a resin-made support cylinder 24 having a substantially cylindrical shape. The supporting cylinder 24 has a cylindrical portion 30
A pair of plate-like legs 26 extending in the radial direction from the outer peripheral surface of the pair are integrally formed. A pair of legs 2
6 are formed with circular openings penetrating in the thickness direction, respectively, and ring-shaped insert fittings 28 are embedded and fixed in these openings, respectively.
【００１７】支持円筒２４の円筒部３０は軸心Ｓに対し
て同軸的に配置されており、円筒部３０の内周面には、
上部側に上方へ向かって内径が拡がった段差部３２が形
成されている。これにより、円筒部３０は段差部３２に
対して上部側では下部側に対して薄肉状となっている。The cylindrical portion 30 of the support cylinder 24 is arranged coaxially with respect to the axis S, and the inner peripheral surface of the cylindrical portion 30 has
A step portion 32 whose inner diameter increases upward is formed on the upper side. Thus, the cylindrical portion 30 is thinner on the upper side with respect to the step portion 32 than on the lower side.
【００１８】一方、弾性体１８の下部側には、円筒部３
０の段差部３２付近に対応する連結部３４が形成されて
おり、この連結部３４の外周部が円筒部３０の段差部３
２及びその上部側に接着されている。これにより、弾性
体１８が支持円筒２４の円筒部３０へ同軸的に連結固定
される。On the other hand, the cylindrical portion 3
A connecting portion 34 corresponding to the vicinity of the step portion 32 of the cylinder portion 30 is formed around the step portion 3 of the cylindrical portion 30.
2 and the upper side thereof. Thereby, the elastic body 18 is coaxially connected and fixed to the cylindrical portion 30 of the support cylinder 24.
【００１９】弾性体１８には、軸心Ｓに沿って弾性体１
８を貫通するように中心穴３６が穿設されている。この
中心穴３６の上端部は頂板金具１２の貫通穴２０へ連通
し、貫通穴２０及び中心穴３６は、後述する受圧液室６
６及び副液室８２へ外部から液体を供給するための液体
注入路３８を構成している。また弾性体１８の下面中心
部には円形の凹部４０が形成されており、この凹部４０
の頂面部には、弾性体１８に穿設された中心穴３６の下
端部が開口している。The elastic body 18 has an elastic body 1 along the axis S.
8, a center hole 36 is formed. The upper end of the center hole 36 communicates with the through hole 20 of the top plate 12, and the through hole 20 and the center hole 36
6 and a liquid injection path 38 for supplying a liquid to the sub liquid chamber 82 from outside. A circular recess 40 is formed in the center of the lower surface of the elastic body 18.
The lower end of a center hole 36 formed in the elastic body 18 is open at the top surface of the elastic body 18.
【００２０】支持円筒２４の円筒部３０内には、段差部
３２の下側に薄肉円筒状の金属製の内筒金具４２が挿入
されている。内筒金具４２には、下端部付近に外周側へ
延出するように屈曲されたフランジ部４４が設けられ、
このフランジ部４４の下部側には上部側の部分に対して
大径とされた円筒状のかしめ部４６が一体的に形成され
ている。In the cylindrical portion 30 of the support cylinder 24, a thin cylindrical metal inner metal fitting 42 is inserted below the stepped portion 32. The inner tube fitting 42 is provided with a flange portion 44 bent near the lower end portion so as to extend to the outer peripheral side,
At the lower side of the flange portion 44, a cylindrical caulking portion 46 having a larger diameter than the upper side portion is integrally formed.
【００２１】内筒金具４２は、その外周面におけるフラ
ンジ部４４の上部側を支持円筒２４の円筒部３０の内周
面へ密着させ、かつフランジ部４４が全周に亘って円筒
部３０内へ埋設されている。これにより、円筒部３０内
へ挿入された内筒金具４２は支持円筒２４へ固定され
る。また弾性体１８の下端部からは薄肉部４８が延出
し、この薄肉部４８により内筒金具４２の内周面が被覆
されている。The inner cylindrical fitting 42 has an upper surface of the flange portion 44 on the outer peripheral surface thereof in close contact with the inner peripheral surface of the cylindrical portion 30 of the support cylinder 24, and the flange portion 44 is inserted into the cylindrical portion 30 over the entire circumference. It is buried. Thus, the inner cylinder fitting 42 inserted into the cylindrical portion 30 is fixed to the support cylinder 24. A thin portion 48 extends from the lower end of the elastic body 18, and the thin portion 48 covers the inner peripheral surface of the inner cylinder 42.
【００２２】内筒金具４２内には、図1に示されるよう
に薄肉リング状の隔壁板５０が挿入されており、隔壁板
５０は弾性体１８下面における凹部４０の周縁部に当接
するように配置されている。隔壁板５０の中心部には円
形開口５２が形成されており、この円形開口５２の周縁
部には、下方へ向かって開いた半円状の断面を有する挟
持フランジ部５４が全周に亘って設けられている。As shown in FIG. 1, a thin ring-shaped partition plate 50 is inserted into the inner cylindrical fitting 42 so that the partition plate 50 is brought into contact with the peripheral edge of the concave portion 40 on the lower surface of the elastic body 18. Are located. A circular opening 52 is formed in the center of the partition plate 50, and a clamping flange portion 54 having a semicircular cross-section that opens downward is formed around the entire periphery of the circular opening 52. Is provided.
【００２３】内筒金具４２内には、隔壁板５０の下側に
略円筒状の隔壁部材５６が挿入されている。隔壁部材５
６の上端部には、内周側へ略直角に屈曲された上側フラ
ンジ部５８が一体的に形成されている。この上側フラン
ジ部５８は径方向に沿ってクランク状に屈曲され、その
内周部が外周部に対して下方に位置する。ここで、隔壁
部材５６は、上側フランジ部５８の外周部を隔壁板５０
の下面に当接させている。A substantially cylindrical partition member 56 is inserted into the inner tube fitting 42 below the partition plate 50. Partition wall member 5
An upper flange portion 58 which is bent at a substantially right angle toward the inner peripheral side is integrally formed at an upper end portion of 6. The upper flange portion 58 is bent in a crank shape along a radial direction, and an inner peripheral portion thereof is located below an outer peripheral portion. Here, the partition member 56 is configured such that the outer peripheral portion of the upper flange portion 58 is
Abut on the lower surface.
【００２４】隔壁部材５６の頂面部には、上側フランジ
部５８の内周側に隔壁板５０の円形開口と略等しい内径
の円形開口６０が形成されている。隔壁板５０と隔壁部
材５６との間には、それぞれの円形開口５２,６０を閉
止するように円板状のメンブランゴム６２が挟持されて
いる。このメンブランゴム６２の上面には、その外周端
に沿って隔壁板５０の挟持フランジ部５４の対応する断
面半円状の係合部６４が形成されている。A circular opening 60 having an inner diameter substantially equal to the circular opening of the partition plate 50 is formed on the top surface of the partition member 56 on the inner peripheral side of the upper flange portion 58. A disk-shaped membrane rubber 62 is sandwiched between the partition plate 50 and the partition member 56 so as to close the respective circular openings 52 and 60. On the upper surface of the membrane rubber 62, a corresponding semicircular cross-section engaging portion 64 of the sandwiching flange portion 54 of the partition plate 50 is formed along the outer peripheral end.
【００２５】メンブランゴム６２は、隔壁板５０の下面
側から係合部６４を挟持フランジ部５４内へ嵌挿しつ
つ、その外周部が隔壁板５０の挟持フランジ部５４と隔
壁部材５６の上側フランジ部５８とにより挟持されてい
る。これにより、メンブランゴム６２は隔壁板５０の円
形開口５２及び隔壁部材５６の円形開口６０をそれぞれ
閉止するように支持される。また、弾性体１８の凹部４
０の下面が隔壁板５０及びメンブランゴム６２により閉
止され、この弾性体１８の凹部４０、隔壁板５０及びメ
ンブランゴム６２により囲まれた空間は、弾性体１８の
変形に伴って内容積が拡縮する受圧液室６６とされてい
る。The membrane rubber 62 has an engaging portion 64 inserted into the sandwiching flange portion 54 from the lower surface side of the partition plate 50, and its outer peripheral portion is formed between the sandwiching flange portion 54 of the partition plate 50 and the upper flange portion of the partition member 56. 58. Thereby, the membrane rubber 62 is supported so as to close the circular opening 52 of the partition plate 50 and the circular opening 60 of the partition member 56, respectively. Also, the concave portion 4 of the elastic body 18
0 is closed by the partition plate 50 and the membrane rubber 62, and the space surrounded by the concave portion 40 of the elastic body 18, the partition plate 50 and the membrane rubber 62 expands and contracts with the deformation of the elastic body 18. A pressure receiving liquid chamber 66 is provided.
【００２６】また隔壁部材５６の下端部には、外周側へ
略直角に屈曲された下側フランジ部６８が一体的に形成
されている。この下側フランジ部６８は径方向に沿って
クランク状に屈曲され、その外周部が内周部に対して下
方に位置する。ここで、隔壁部材５６は下側フランジ部
６８の外周側端部を弾性体１８の薄肉部４８を介して内
筒金具４２のフランジ部４４の下面へ当接させている。
これにより、内筒金具４２内において隔壁部材５６及び
隔壁板５０がそれぞれ所定の位置決めされる。At the lower end of the partition member 56, a lower flange portion 68 bent substantially at right angles to the outer peripheral side is integrally formed. The lower flange portion 68 is bent in a crank shape along the radial direction, and its outer peripheral portion is located below the inner peripheral portion. Here, the partition member 56 has the outer peripheral end portion of the lower flange portion 68 abutted on the lower surface of the flange portion 44 of the inner cylinder 42 via the thin portion 48 of the elastic body 18.
As a result, the partition member 56 and the partition plate 50 are positioned at predetermined positions in the inner cylindrical member 42.
【００２７】隔壁部材５６の外周面と内筒金具４２の内
周面との間には、上端部及び下端部がそれぞれ隔壁板５
０の外周部及び下側フランジ部６８の内周部により閉止
された環状の空間が形成され、この環状の空間は受圧液
室６６と後述する副液室とを互いに連通させる制限通路
７０とされている。ここで、制限通路７０は周方向にお
ける少なくとも１箇所で仕切板（図示省略）により閉止
されている。また隔壁板５０の外周部には連通穴７２が
穿設されており、この連通穴７２を通して受圧液室６６
は制限通路７０へ連通している。Between the outer peripheral surface of the partition member 56 and the inner peripheral surface of the inner cylinder fitting 42, the upper end and the lower end are formed by the partition plate 5, respectively.
A closed annular space is formed by the outer peripheral portion 0 and the inner peripheral portion of the lower flange portion 68, and this annular space is a restriction passage 70 for communicating the pressure receiving liquid chamber 66 and a sub liquid chamber described later with each other. ing. Here, the restriction passage 70 is closed by a partition plate (not shown) at at least one position in the circumferential direction. A communication hole 72 is formed in the outer peripheral portion of the partition plate 50, and the pressure receiving liquid chamber 66 is formed through the communication hole 72.
Communicates with the restriction passage 70.
【００２８】隔壁部材５６の下方には、略円板状とされ
たゴム製のダイアフラム７４が配置される。ダイアフラ
ム７４には、その中心部に上方へ向かって凸状に湾曲し
た薄膜状の弾性隔壁部７６が設けられており、この弾性
隔壁部７６は隔壁部材５６の下面側を閉止すると共に、
隔壁部材５６内に挿入されて頂部付近をメンブランゴム
６２の下面へ当接させている。Below the partition member 56, a substantially disk-shaped rubber diaphragm 74 is disposed. The diaphragm 74 is provided with a thin-film-like elastic partition wall portion 76 which is curved upward and convex at the center thereof, and the elastic partition wall portion 76 closes the lower surface side of the partition member 56,
It is inserted into the partition member 56 and the vicinity of the top is brought into contact with the lower surface of the membrane rubber 62.
【００２９】メンブランゴム６２の下面には、図３に示
されるように隔壁部材５６の円形開口６０に面して４個
の突起部７８が一体的に形成されている。これらの突起
部７８はそれぞれ扇状の軸直角断面を有しており、軸心
Ｓを中心とする径方向に沿って互いに等間隔（９０°間
隔）となるように対称的に配置されている。これによ
り、メンブランゴム６２の下面には、互いに隣接する一
対の突起部７８に径方向へ延在する２本の溝状の負圧導
入路８０が形成されている。これら２本の負圧導入路８
０は軸心Ｓにおいて直交するように交差し、全体として
は十字状に延在している。ここで、突起部７８の先端面
はそれぞれ円形開口６０を通して副液室８２内まで突出
している。As shown in FIG. 3, four projections 78 are integrally formed on the lower surface of the membrane rubber 62 so as to face the circular opening 60 of the partition member 56. These projections 78 each have a fan-shaped cross section perpendicular to the axis, and are arranged symmetrically at equal intervals (90 ° intervals) along the radial direction centered on the axis S. Thus, on the lower surface of the membrane rubber 62, two groove-shaped negative pressure introduction passages 80 extending in the radial direction are formed on a pair of protrusions 78 adjacent to each other. These two negative pressure introduction paths 8
0 intersects orthogonally at the axis S, and extends in a cross shape as a whole. Here, the distal end surfaces of the projections 78 project into the sub liquid chamber 82 through the circular openings 60, respectively.
【００３０】隔壁部材５６の内周側には、上面及び下面
側がそれぞれメンブランゴム６２及びダイアフラム７４
の弾性隔壁部７６により閉止された空間が形成され、こ
の空間は液体が充填される副液室８２とされている。こ
こで、隔壁部材５６の周壁部には連通穴８４が穿設され
ており、この連通穴８４を通して副液室８２は制限通路
７０へ連通している。従って、受圧液室６６及び副液室
８２は、連通穴７２,８４及び制限通路７０を通して互
いに繋がっており、これら液室６６,８２内に充填され
た液体は制限通路７０を通って互いに流通可能になって
いる。On the inner peripheral side of the partition member 56, an upper surface and a lower surface are respectively provided with a membrane rubber 62 and a diaphragm 74.
A closed space is formed by the elastic partition wall portion 76, and this space is a sub liquid chamber 82 filled with liquid. Here, a communication hole 84 is formed in the peripheral wall portion of the partition member 56, and the auxiliary liquid chamber 82 communicates with the restriction passage 70 through the communication hole 84. Therefore, the pressure receiving liquid chamber 66 and the auxiliary liquid chamber 82 are connected to each other through the communication holes 72 and 84 and the restriction passage 70, and the liquid filled in these liquid chambers 66 and 82 can flow through the restriction passage 70 to each other. It has become.
【００３１】ダイアフラム７４には、外周部に弾性隔壁
部７６に対して肉厚状とされたリブ８６が形成されてい
る。このリブ８６は、内周部が弾性隔壁部７６に対して
上方へ突出し、かつ外周部が弾性隔壁部７６に対して下
方へ突出するように、径方向に沿ってクランク状に屈曲
した断面を有している。A rib 86 is formed on the outer periphery of the diaphragm 74 so as to be thicker than the elastic partition wall portion 76. The rib 86 has a cross section bent in a crank shape along the radial direction such that the inner peripheral portion projects upward with respect to the elastic partition wall portion 76 and the outer peripheral portion projects downward with respect to the elastic partition wall portion 76. Have.
【００３２】ダイアフラム７４の下側には、略円板状に
形成された金属製のキャップ部材８８が配置される。キ
ャップ部材８８には、中心部に下方へ突出するように湾
曲した略円錐台状の気室部９０が形成されている。この
気室部９０は、ダイアフラム７４の弾性隔壁部７６との
間に弾性隔壁部７６の軸方向に沿った弾性変形を可能と
する空気室９２を形成している。ここで、キャップ部材
８８には、必要に応じて空気室９２を外部へ連通させ、
空気室９２内の気圧上昇を抑制するための空気穴が穿設
される。Below the diaphragm 74, a metal cap member 88 formed in a substantially disk shape is disposed. The cap member 88 is formed with a substantially truncated conical air chamber portion 90 that is curved to protrude downward at the center. The air chamber 90 forms an air chamber 92 between the diaphragm 74 and the elastic partition 76 that allows elastic deformation along the axial direction of the elastic partition 76. Here, an air chamber 92 is connected to the outside of the cap member 88 as necessary,
An air hole for suppressing an increase in air pressure in the air chamber 92 is formed.
【００３３】またキャップ部材８８には、気室部９０の
外周端部から径方向外側へ延出するリング状のフランジ
部９４が形成され、このフランジ部９４の外周部には断
面が上方へ向かって開いた略コ字状とされた嵌挿部９６
が形成されている。キャップ部材８８はフランジ部９４
をダイアフラム７４のリブ８６の下面に当接させてい
る。これにより、ダイアフラム７４はリブ８６が隔壁部
材５６の下側フランジ部６８とキャップ部材８８のフラ
ンジ部９４とより挟持されて固定される。このとき、ダ
イアフラム７４の下方へ突出する外周部がキャップ部材
８８の嵌挿部９６に嵌挿した状態となり、これにより、
副液室８２から大きな液圧を受けた場合でもダイアフラ
ム７４のずれ、脱落等が防止される。The cap member 88 is formed with a ring-shaped flange portion 94 extending radially outward from the outer peripheral end of the air chamber portion 90. The outer peripheral portion of the flange portion 94 has a cross section facing upward. Insertion portion 96 having a substantially U-shape opened
Are formed. The cap member 88 has a flange 94
Is in contact with the lower surface of the rib 86 of the diaphragm 74. As a result, the diaphragm 74 is fixed with the rib 86 sandwiched between the lower flange portion 68 of the partition member 56 and the flange portion 94 of the cap member 88. At this time, the outer peripheral portion protruding downward of the diaphragm 74 is in a state of being inserted into the insertion portion 96 of the cap member 88, whereby
Even when a large liquid pressure is received from the sub liquid chamber 82, the displacement, falling off, and the like of the diaphragm 74 are prevented.
【００３４】内筒金具４２のかしめ部４６の下端部は、
図１に示されるように内周側へ塑性的に変形さ（かしめ
ら）れ、内筒金具４２のかしめ部４６とフランジ部４４
とにより隔壁部材５６の下側フランジ部６８、ダイアフ
ラム７４のリブ８６及びキャップ部材８８の嵌挿部９６
が軸方向へ重ね合わされた状態で挟持される。これによ
り、これにより、隔壁板５０、隔壁部材５６、ダイアフ
ラム７４及びキャップ部材８８が支持円筒２４へ固定さ
れる。The lower end of the caulking portion 46 of the inner cylinder 42 is
As shown in FIG. 1, the inner peripheral side is plastically deformed (caulked), and the caulked portion 46 and the flange portion 44
Thus, the lower flange portion 68 of the partition member 56, the rib 86 of the diaphragm 74, and the insertion portion 96 of the cap member 88 are inserted.
Are sandwiched in a state of being overlapped in the axial direction. Thus, the partition plate 50, the partition member 56, the diaphragm 74, and the cap member 88 are fixed to the support cylinder 24.
【００３５】上記のように構成された防振装置１０は、
組立工程の最終段階で受圧液室６６、制限通路７０及び
副液室８２からなる液室空間９８（図３参照）内に水、
エチレングリコール、シリコンオイル等の液体が充填封
入される。この際、液体注入路３８の頂板金具１２側の
端部にはニップル１０２が挿入され、このニップル１０
２を介して圧力配管１００が接続される。圧力配管１０
０の途中で配管１０４,１０６に分岐しており、一方の
配管１０４には真空ポンプ１０８が接続され、この真空
ポンプ１０８と配管１０４の分岐部との間に開閉弁１１
０及び真空計１１２が配置されている。また他方の配管
１０６には液体が貯えられた給液タンク１１４に接続さ
れ、この給液タンク１１４と配管１０６の分岐部との間
にも開閉弁１１６が配置されている。The anti-vibration device 10 configured as described above is
In the final stage of the assembling process, water is introduced into a liquid chamber space 98 (see FIG. 3) including the pressure receiving liquid chamber 66, the restriction passage 70, and the sub liquid chamber 82.
A liquid such as ethylene glycol or silicone oil is filled and sealed. At this time, a nipple 102 is inserted into an end of the liquid injection passage 38 on the side of the top plate fitting 12, and the nipple 10 is
The pressure pipe 100 is connected through the connection line 2. Pressure piping 10
In the middle of the pipe 0, the pipes 104 and 106 are branched. One of the pipes 104 is connected to a vacuum pump 108, and the on-off valve 11 is connected between the vacuum pump 108 and the branch of the pipe 104.
0 and a vacuum gauge 112 are arranged. The other pipe 106 is connected to a liquid supply tank 114 in which liquid is stored, and an open / close valve 116 is also arranged between the liquid supply tank 114 and a branch of the pipe 106.
【００３６】液室空間９８内に液体を充填する際には、
先ず、開閉弁１１０が開に、開閉弁１１６が閉として、
この状態で真空ポンプ１０８を作動させる。これによ
り、真空ポンプ１０８が圧力配管１００及び液体注入路
３８を通して液室空間９８内の空気を外部へ排気する。
このとき、副液室８２内の空気は制限通路７０を通って
受圧液室６６内へ流動し、受圧液室６６を経由して真空
ポンプ１０８により排気される。When filling the liquid in the liquid chamber space 98,
First, the on-off valve 110 is opened and the on-off valve 116 is closed,
In this state, the vacuum pump 108 is operated. Thereby, the vacuum pump 108 exhausts the air in the liquid chamber space 98 to the outside through the pressure pipe 100 and the liquid injection path 38.
At this time, the air in the sub liquid chamber 82 flows into the pressure receiving liquid chamber 66 through the restriction passage 70, and is exhausted by the vacuum pump 108 via the pressure receiving liquid chamber 66.
【００３７】ここで、副液室８２の隔壁における一部を
構成するダイアフラム７４の弾性隔壁部７６は、副液室
８２の隔壁における他の部分、例えば、メンブランゴム
６２と比較して剛性が低い。このため、副液室８２内の
空気が排気されて副液室８２内が減圧されると、ダイア
フラム７４の弾性隔壁部７６が優先的に副液室８２の容
積縮小方向へ変形する。この結果、図４に示されるよう
に弾性隔壁部７６の中央部が実線で示されるようにメン
ブランゴム６２における突起部７８の下面へ圧着する。
このとき、突起部７８は、弾性隔壁部７６の一部が負圧
導入路８０内に入り込むような形状に変形し、弾性隔壁
部７６により負圧導入路８０が閉止されたり、弾性隔壁
部７６が隔壁部材５６の連通穴８４付近の内壁へ密着し
ないように副液室８２内への突出長（負圧導入路８０の
深さ）及び、隣り合う突起部７８との間隔（負圧導入路
８０の幅）がそれぞれ設定されている。Here, the elastic partition wall portion 76 of the diaphragm 74 constituting a part of the partition wall of the sub liquid chamber 82 has a lower rigidity than other parts of the partition wall of the sub liquid chamber 82, for example, the membrane rubber 62. . Therefore, when the air in the sub-liquid chamber 82 is exhausted and the pressure in the sub-liquid chamber 82 is reduced, the elastic partition wall portion 76 of the diaphragm 74 is preferentially deformed in the direction of reducing the volume of the sub-liquid chamber 82. As a result, as shown in FIG. 4, the central portion of the elastic partition wall portion 76 is pressed against the lower surface of the projection 78 of the membrane rubber 62 as shown by a solid line.
At this time, the projection 78 is deformed into a shape such that a part of the elastic partition 76 enters the negative pressure introduction channel 80, and the negative pressure introduction channel 80 is closed by the elastic partition 76, or the elastic partition 76. The length of the protrusion into the auxiliary liquid chamber 82 (the depth of the negative pressure introduction passage 80) and the distance between the adjacent protrusions 78 (the negative pressure introduction passage) so as not to adhere to the inner wall near the communication hole 84 of the partition member 56. 80 width).
【００３８】従って、図４に示されるように、副液室８
２内の負圧の作用によって弾性隔壁部７６の中央部付近
がメンブランゴム６２における突起部７８の下面へ密着
し、弾性隔壁部７６の外周部と隔壁部材５６との間に隙
間ができても、この隙間全体が負圧導入路８０により制
限通路７０へ連通する。この結果、液室空間９８を所定
の真空度まで減圧する際に、制限通路７０を通して副液
室８２全体が所定の真空度まで確実に減圧される。Therefore, as shown in FIG.
Even if the vicinity of the central portion of the elastic partition wall portion 76 closely adheres to the lower surface of the projection 78 of the membrane rubber 62 due to the action of the negative pressure in 2, the gap is formed between the outer peripheral portion of the elastic partition wall portion 76 and the partition wall member 56. The entire gap communicates with the restriction passage 70 through the negative pressure introduction passage 80. As a result, when the pressure in the liquid chamber space 98 is reduced to a predetermined degree of vacuum, the entire sub liquid chamber 82 is reliably reduced to a predetermined degree of vacuum through the restriction passage 70.
【００３９】真空ポンプ１０８は真空計１１２による計
測値が所定の真空度に達するまで作動される。ここで、
液室空間９８内全体が均一に減圧されているならば、真
空計１１２により計測される真空度は液室空間９８内の
真空度と誤差範囲内で一致する。真空計１１２の計測値
が所定の真空度に達したならば、真空ポンプ１０８を作
動停止させ、開閉弁１１０を開状態から閉状態とする。
これにより、液室空間９８内は所定の真空度に維持され
る。The vacuum pump 108 is operated until the value measured by the vacuum gauge 112 reaches a predetermined degree of vacuum. here,
If the entire pressure in the liquid chamber space 98 is uniformly reduced, the degree of vacuum measured by the vacuum gauge 112 matches the degree of vacuum in the liquid chamber space 98 within an error range. When the measured value of the vacuum gauge 112 reaches a predetermined degree of vacuum, the operation of the vacuum pump 108 is stopped, and the on-off valve 110 is changed from the open state to the closed state.
Thus, the inside of the liquid chamber space 98 is maintained at a predetermined degree of vacuum.
【００４０】次いで、開閉弁１１６を閉状態から開状態
とすると、液室空間９８の真空（負圧）の作用及び、弾
性体１８及びダイアフラム７４が容積拡大方向へ復元す
ることによって給液タンク１１４内の液体が液室空間９
８内へ吸入され、液室空間９８内に隙間なく液体が充填
される。このとき、給液タンク１１４内の液体を特に加
圧する必要はないが、静圧により液体の液室空間９８内
への移動及び充填が促進されるように給液タンク１１４
を防振装置１０より高い位置に設置しておくことが好ま
しい。Next, when the open / close valve 116 is changed from the closed state to the open state, the action of the vacuum (negative pressure) in the liquid chamber space 98 and the return of the elastic body 18 and the diaphragm 74 to the direction of the expansion of the volume cause the liquid supply tank 114. Liquid in the liquid chamber space 9
8, the liquid is filled into the liquid chamber space 98 without any gap. At this time, the liquid in the liquid supply tank 114 does not need to be particularly pressurized, but the liquid supply tank 114 is moved so that the movement and filling of the liquid into the liquid chamber space 98 are promoted by the static pressure.
Is preferably installed at a position higher than the vibration isolator 10.
【００４１】液室空間９８内への液体の充填が完了した
ならば、圧力配管１００のニップル１０２を液体注入路
３８から抜き取り、液体注入路３８の頂板金具１２側の
開口部から密閉栓１１８を圧入し、図１に示されるよう
に密閉栓１１８により液体注入路３８を閉止して液体を
液室空間９８内に封入する。ここで、密閉栓１１８は先
端側が球状とされた軸部１２０と、この軸部１２０の基
端側に一体的に設けられた大径の頭部１２２を備えてお
り、軸部１２０の球状部が頂板金具１２の下面側まで挿
入されることにより、液体注入路３８からの脱落及び漏
洩が防止されるようになっている。When the filling of the liquid in the liquid chamber space 98 is completed, the nipple 102 of the pressure pipe 100 is withdrawn from the liquid injection passage 38, and the sealing stopper 118 is removed from the opening of the liquid injection passage 38 on the side of the top plate fitting 12. The liquid is inserted into the liquid chamber space 98 by press-fitting and closing the liquid injection path 38 with a sealing stopper 118 as shown in FIG. Here, the sealing stopper 118 includes a shaft portion 120 having a spherical distal end and a large-diameter head 122 provided integrally with the proximal end of the shaft 120. Is inserted to the lower surface side of the top plate fitting 12 to prevent the liquid from being dropped and leaked from the liquid injection path 38.
【００４２】上記のように構成された防振装置１０は脚
部２６がそのインサート金具２８内を挿通するボルト
（図示省略）により車体状へ締結固定され、エンジン側
のブラケットが頂板金具１２上にボルト１４により連結
固定されると共に、このボルト１４及びピン１６により
相対的に所定の位置関係となるように位置決めされる。In the vibration isolator 10 configured as described above, the legs 26 are fastened and fixed to the vehicle body by bolts (not shown) inserted through the insert fittings 28, and the engine side bracket is mounted on the top plate fitting 12. It is connected and fixed by the bolt 14 and is positioned so as to have a relatively predetermined positional relationship by the bolt 14 and the pin 16.
【００４３】（実施形態の作用）次に、本実施形態に係
る防振装置１０による作用を説明する。(Operation of Embodiment) Next, the operation of the vibration isolator 10 according to this embodiment will be described.
【００４４】本実施形態の防振装置１０では、頂板金具
１２を介してエンジンからの振動が弾性体１８に伝達さ
れると、弾性体１８は吸振主体として作用し、弾性体１
８の内部摩擦に基づく吸振作用によって振動が吸収され
る。これと同時に、弾性体１８の変形に伴って受圧液室
６６の内容積が拡縮すると共に、制限通路７０を通して
受圧液室６６と副液室８２との間を液体が相互に流通す
る。このとき、副液室８２の隔壁の一部を構成するダイ
アフラム７４が容積拡縮方向へ変形し、副液室８２内で
の液圧上昇が抑制されることから、受圧液室６６内の内
容積の拡縮（液圧変化）に追従して受圧液室６６と副液
室８２との間で液体が円滑に流通する。この結果、制限
通路７０を通過する液体の圧力変化、粘性抵抗等により
振動エネルギが吸収されてエンジンから車体側へ伝えら
れる振動を減衰できる。In the vibration isolator 10 of the present embodiment, when vibration from the engine is transmitted to the elastic body 18 via the top plate 12, the elastic body 18 acts as a vibration absorber and the elastic body 1
Vibration is absorbed by the vibration absorbing action based on the internal friction of No. 8. At the same time, the internal volume of the pressure receiving liquid chamber 66 expands and contracts with the deformation of the elastic body 18, and the liquid flows between the pressure receiving liquid chamber 66 and the auxiliary liquid chamber 82 through the restriction passage 70. At this time, the diaphragm 74 forming a part of the partition wall of the sub liquid chamber 82 is deformed in the volume expansion / contraction direction, and the rise in the liquid pressure in the sub liquid chamber 82 is suppressed. The liquid flows smoothly between the pressure receiving liquid chamber 66 and the sub liquid chamber 82 following the expansion and contraction (fluctuation of the liquid pressure). As a result, vibration energy is absorbed by the pressure change, viscous resistance, and the like of the liquid passing through the restriction passage 70, and the vibration transmitted from the engine to the vehicle body can be attenuated.
【００４５】また、弾性体１８の剛性、制限通路７０の
長さ及び断面積等に対応する周波数域（チューニング周
波数域）の振動がエンジンから防振装置１０へ入力した
場合には、制限通路７０を通して受圧液室６６と副液室
８２との間における液体流通を共振作用（液柱共振）に
より増幅できることから、防振装置１０によりエンジン
から入力するチューニング周波数域の振動を特に効果的
に減衰できる。When vibrations in a frequency range (tuning frequency range) corresponding to the rigidity of the elastic body 18 and the length and cross-sectional area of the restriction passage 70 are input from the engine to the vibration isolator 10, the restriction passage 70 The liquid flow between the pressure receiving liquid chamber 66 and the sub liquid chamber 82 can be amplified by the resonance action (liquid column resonance) through the through hole, so that the vibration damping device 10 can particularly effectively attenuate the vibration in the tuning frequency range input from the engine. .
【００４６】また、受圧液室６６と副液室８２との間を
仕切るメンブランゴム６２がそれぞれの液室６６,８２
の容積拡縮方向へ変形可能とされていることから、例え
ば、大振幅の振動が弾性体１８へ入力し、受圧液室６６
の内容積が急激に変化した場合でも、メンブランゴム６
２の変形によって受圧液室６６内における過大な液圧上
昇を防止することができるので、動ばね定数の上昇に伴
う大振幅の振動に対する減衰能力の低下を抑制できる。Further, the membrane rubber 62 for partitioning between the pressure receiving liquid chamber 66 and the sub liquid chamber 82 is provided in each of the liquid chambers 66, 82.
Is deformable in the volume expansion / contraction direction, for example, large-amplitude vibration is input to the elastic body 18 and the pressure-receiving liquid chamber 66
Even if the internal volume of the membrane changes suddenly, the membrane rubber 6
Since the excessive increase in the hydraulic pressure in the pressure receiving liquid chamber 66 can be prevented by the deformation of 2, the decrease in the damping ability with respect to the large amplitude vibration accompanying the increase in the dynamic spring constant can be suppressed.
【００４７】一方、本実施形態の防振装置１０の液室空
間９８への液体充填時には、メンブランゴム６２の下面
に副液室８２内へそれぞれ突出するように４個の突起部
７８が形成され、これらの突起部７８の間が負圧導入路
８０とされていることにより、液室空間９８内への液体
充填時に制限通路７０を通して副液室８２内が減圧さ
れ、ダイアフラム７４の一部が突起部７８の下面を含む
副液室８２の内壁へ密着し、ダイアフラム７４の他の一
部と副液室８２の内壁部との間に隙間ができた場合で
も、負圧導入路８０がダイアフラム７４と副液室８２の
内壁部との間に生じる隙間を制限通路へ連通させる。On the other hand, when the liquid chamber space 98 of the vibration isolator 10 of the present embodiment is filled with liquid, four projections 78 are formed on the lower surface of the membrane rubber 62 so as to project into the sub liquid chamber 82, respectively. Since the negative pressure introduction passage 80 is formed between the projections 78, the pressure in the sub liquid chamber 82 is reduced through the restriction passage 70 when the liquid is filled into the liquid chamber space 98, and a part of the diaphragm 74 is partially removed. Even if the inner wall of the sub liquid chamber 82 including the lower surface of the projection 78 is in close contact with the inner wall of the sub liquid chamber 82 and a gap is formed between the other part of the diaphragm 74 and the inner wall of the sub liquid chamber 82, the negative pressure introduction passage 80 is still in contact with the diaphragm. The gap generated between the sub-liquid chamber and the inner wall of the auxiliary liquid chamber is communicated with the restriction passage.
【００４８】この結果、制限通路７０を通して副液室８
２内を減圧、すなわち制限通路７０を通して副液室８２
内の空気を排気する際に、副液室８２内の気圧が低下す
ると共にダイアフラムが副液室の容積縮小方向へ変形
し、ダイアフラム７４の一部のみが副液室８２の内壁部
へ密着し、ダイアフラム７４の他の一部と副液室８２の
内壁部との間に隙間ができた場合でも、この隙間を負圧
導入路８０により制限通路７０へ連通できるので、制限
通路７０を通して副液室８２内の空気を所要の真空度が
得られるまで確実に減圧（排気）できるようになる。従
って、所要の真空度まで減圧された副液室８２へ制限通
路７０を通して液体を供給すれば、液体供給時に副液室
８２内から空気を排気したり供給する液体を加圧したり
することなく、副液室８２内へ空気が残らないように液
体を充填できる。As a result, the auxiliary liquid chamber 8 passes through the restriction passage 70.
2, the sub-liquid chamber 82 through the restriction passage 70
When the air inside is exhausted, the pressure in the auxiliary liquid chamber 82 decreases and the diaphragm deforms in the direction of reducing the volume of the auxiliary liquid chamber, and only a part of the diaphragm 74 adheres to the inner wall of the auxiliary liquid chamber 82. Even if a gap is formed between the other part of the diaphragm 74 and the inner wall of the sub liquid chamber 82, the gap can be communicated to the restriction passage 70 by the negative pressure introduction passage 80. The air in the chamber 82 can be reliably reduced in pressure (exhausted) until a required degree of vacuum is obtained. Therefore, if the liquid is supplied through the restriction passage 70 to the sub-liquid chamber 82 reduced in pressure to the required degree of vacuum, the air is not exhausted from the sub-liquid chamber 82 or the liquid to be supplied is pressurized at the time of supplying the liquid. The liquid can be filled so that air does not remain in the sub liquid chamber 82.
【００４９】なお、負圧導入路８０は、メンブランゴム
６２の下面に複数（４個）の突起部７８を一体成形して
設けているが、必ずしも突起部７８間を負圧導入路８０
とする必要はなく、メンブランゴム６２の下面に凹状の
溝を形成し、この溝を負圧導入路としてもよく、またメ
ンブランゴム６２の複数の部位へ開口するような貫通穴
を穿設し、この貫通穴を負圧導入路とするようにしても
よい。The negative pressure introducing passage 80 has a plurality of (four) protrusions 78 integrally formed on the lower surface of the membrane rubber 62. However, the negative pressure introducing passage 80 is not necessarily provided between the protrusions 78.
It is not necessary to form a concave groove on the lower surface of the membrane rubber 62, and this groove may be used as a negative pressure introduction path, and a through hole is formed to open to a plurality of portions of the membrane rubber 62, This through-hole may be used as a negative pressure introduction path.
【００５０】また負圧導入路が設けられる仕切部材は、
必ずしも弾性体であるメンブランゴム６２である必要は
なく、受圧液室６６と副液室８２との間に設けられる樹
脂、金属等からなる仕切部材に負圧導入路を設けてもよ
い。The partition member provided with the negative pressure introduction path is
It is not always necessary to use the membrane rubber 62 which is an elastic body, and a negative pressure introducing passage may be provided in a partition member made of resin, metal or the like provided between the pressure receiving liquid chamber 66 and the sub liquid chamber 82.
【００５１】[0051]
【発明の効果】以上説明したように本発明の防振装置及
び防振装置への液体充填方法によれば、真空注入法によ
り副液室内へ液体を供給する際に、制限通路を通して副
液室内を確実に減圧し、副液室内に空気が残らないよう
に液体を充填できる。As described above, according to the vibration damping device and the method of filling the vibration damping device with liquid according to the present invention, when the liquid is supplied into the sub liquid chamber by the vacuum injection method, the sub liquid chamber is passed through the restriction passage. Is reliably reduced in pressure, and the liquid can be filled so that air does not remain in the sub liquid chamber.
【図１】 本発明の実施の形態に係る防振装置の構成を
示す軸方向に沿った断面図である。FIG. 1 is a sectional view along the axial direction showing a configuration of a vibration isolator according to an embodiment of the present invention.
【図２】 本発明の実施の形態に係る防振装置及び防振
装置の液室空間へ液体するための構成を示す軸方向に沿
った断面図である。FIG. 2 is a cross-sectional view along the axial direction showing a vibration isolator according to the embodiment of the present invention and a configuration for liquid-liquid into a liquid chamber space of the vibration isolator.
【図３】 本発明の実施の形態に係る防振装置への液室
空間への液体充填時に副液室を減圧した状態を示す軸方
向に沿った断面図である。FIG. 3 is a cross-sectional view along the axial direction showing a state where the sub-liquid chamber is depressurized when filling the liquid chamber space with the liquid in the vibration isolator according to the embodiment of the present invention.
【図４】 本発明の実施の形態に係る防振装置における
メンブランゴムに設けられた突起部を示す斜視図であ
る。FIG. 4 is a perspective view showing a protrusion provided on the membrane rubber in the vibration isolator according to the embodiment of the present invention.
１０ 防振装置 １２ 頂板金具（取付部材） １８ 弾性体 ２４ 支持円筒（取付部材） ３８ 液体注入路 ５０ 隔壁板 ５６ 隔壁部材 ６２ メンブランゴム（仕切部材） ６６ 受圧液室 ７０ 制限通路 ７４ ダイアフラム ７６ 弾性隔壁部（ダイアフラム） ７８ 突起部 ８０ 負圧導入路 ８２ 副液室 ９８ 液室空間 １００ 圧力配管 １０８ 真空ポンプ（負圧発生源） １１４ 給液タンク（液体供給源） DESCRIPTION OF SYMBOLS 10 Vibration isolator 12 Top plate fitting (attachment member) 18 Elastic body 24 Support cylinder (attachment member) 38 Liquid injection path 50 Partition plate 56 Partition member 62 Membrane rubber (partition member) 66 Pressure receiving liquid chamber 70 Restriction passage 74 Diaphragm 76 Elastic partition Part (diaphragm) 78 Projecting part 80 Negative pressure introduction path 82 Sub liquid chamber 98 Liquid chamber space 100 Pressure piping 108 Vacuum pump (negative pressure generation source) 114 Liquid supply tank (liquid supply source)
Claims (4)
れる第１の取付部材と、 振動発生部及び振動受部の他方に連結される第２の取付
部材と、 前記第１の取付部材と前記第２の取付部材との間に配置
されて振動発生部からの振動により変形する弾性体と、 隔壁の少なくとも一部が前記弾性体により形成され、液
体が封入される受圧液室と、 前記受圧液室に隣接して設けられ、液体が封入される副
液室と、 前記受圧液室と前記副液室とを互いに液体が流通可能と
なるように連通させる制限通路と、 前記受圧液室と前記副液室との間に配置されて受圧液室
と副液室とを区画する隔壁の少なくとも一部を構成する
仕切部材と、 前記副液室の隔壁の一部を構成し、前記仕切部材に対向
するように配置されたダイアフラムと、 前記仕切部材における前記副液室内へ面した受圧面に設
けられ、前記制限通路を通して前記副液室内が減圧さ
れ、前記ダイアフラムの一部が前記仕切部材へ密着した
場合に、前記ダイアフラムの他の一部と前記副液室の内
壁部との間に生じる隙間を前記制限通路へ連通させる負
圧導入路と、 を有することを特徴とする防振装置。A first mounting member connected to one of the vibration generating unit and the vibration receiving unit; a second mounting member connected to the other of the vibration generating unit and the vibration receiving unit; and the first mounting An elastic body disposed between the member and the second mounting member and deformed by vibration from a vibration generating unit; and a pressure-receiving liquid chamber in which at least a part of a partition is formed of the elastic body and in which liquid is sealed. A sub-liquid chamber provided adjacent to the pressure-receiving liquid chamber and filled with a liquid; a restriction passage for communicating the pressure-receiving liquid chamber and the sub-liquid chamber so that liquid can flow therebetween; A partition member that is arranged between the liquid chamber and the sub liquid chamber and that constitutes at least a part of a partition that divides the pressure receiving liquid chamber and the sub liquid chamber, and that constitutes a part of the partition of the sub liquid chamber; A diaphragm disposed so as to face the partition member; The sub-liquid chamber is provided on a pressure-receiving surface facing the sub-liquid chamber, and when the pressure in the sub-liquid chamber is reduced through the restriction passage and a part of the diaphragm comes into close contact with the partition member, another part of the diaphragm and the sub-liquid are And a negative pressure introduction passage for communicating a gap formed between the liquid passage and an inner wall of the liquid chamber to the restriction passage.
液室内へ突出するように設けられた複数の突起部の間に
形成されることを特徴とする請求項１記載の防振装置。2. The anti-vibration device according to claim 1, wherein the negative pressure introduction path is formed between a plurality of protrusions provided on the pressure receiving surface so as to protrude into the sub liquid chamber. apparatus.
液室との容積拡縮方向へ弾性的に変形可能とされ、前記
受圧液室及び前記副液室内の液圧変化に応じて前記容積
拡縮方向へ変形することを特徴とする請求項１又は２記
載の防振装置。3. The partition member is resiliently deformable in a volume expansion / contraction direction between the pressure receiving liquid chamber and the sub liquid chamber, and the partition member is adapted to change the liquid pressure in the pressure receiving liquid chamber and the sub liquid chamber in response to a change in liquid pressure in the pressure receiving liquid chamber and the sub liquid chamber. The vibration isolator according to claim 1, wherein the vibration isolator deforms in a volume expansion / contraction direction.
ける副液室へ液体を充填するための液体充填方法であっ
て、 前記受圧液室に接続された負圧発生源により前記制限通
路を通して前記副液室内を減圧した後、前記受圧液室に
液体供給源を接続して該液体供給源から前記制限通路を
通して前記副液室内に液体を供給することを特徴とする
防振装置への液体充填方法。4. A liquid filling method for filling a liquid into a sub liquid chamber in the vibration isolator according to claim 1, 2 or 3, wherein the restriction is performed by a negative pressure generating source connected to the pressure receiving liquid chamber. After reducing the pressure in the sub-liquid chamber through the passage, a liquid supply source is connected to the pressure-receiving liquid chamber, and the liquid is supplied from the liquid supply source into the sub-liquid chamber through the restriction passage. Liquid filling method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000049991A JP4361998B2 (en) | 2000-02-25 | 2000-02-25 | Anti-vibration device and method for filling liquid into anti-vibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000049991A JP4361998B2 (en) | 2000-02-25 | 2000-02-25 | Anti-vibration device and method for filling liquid into anti-vibration device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001241489A true JP2001241489A (en) | 2001-09-07 |
| JP4361998B2 JP4361998B2 (en) | 2009-11-11 |
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ID=18571838
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000049991A Expired - Lifetime JP4361998B2 (en) | 2000-02-25 | 2000-02-25 | Anti-vibration device and method for filling liquid into anti-vibration device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009015588A1 (en) * | 2007-07-27 | 2009-02-05 | Byd Company Limited | Hydraulic mount and filling device for the same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5398098B1 (en) | 2012-03-23 | 2014-01-29 | 東海ゴム工業株式会社 | Fluid filled vibration isolator |
| KR101845789B1 (en) | 2016-10-25 | 2018-04-05 | 기아자동차주식회사 | Engine mount for vehicle having structure for reducing noise |
-
2000
- 2000-02-25 JP JP2000049991A patent/JP4361998B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009015588A1 (en) * | 2007-07-27 | 2009-02-05 | Byd Company Limited | Hydraulic mount and filling device for the same |
| US8360403B2 (en) | 2007-07-27 | 2013-01-29 | Byd Company, Ltd. | Hydraulic mount and filling device for the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4361998B2 (en) | 2009-11-11 |
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