JP2011047464A

JP2011047464A - Vibration control device

Info

Publication number: JP2011047464A
Application number: JP2009195978A
Authority: JP
Inventors: Hiroshi Kojima; 宏小島; Yasuhiro Suzuki; 康弘鈴木
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2009-08-26
Filing date: 2009-08-26
Publication date: 2011-03-10

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration control device effectively attenuating both of engine shake vibration and idling vibration, and effectively inhibiting increase of dynamic spring rate in acceleration travel of a vehicle. <P>SOLUTION: A partition member 6 is composed of a fixed frame member 11 which contributes for partitioning a second limited passage 10, and a valve member 12 which is floating-supported in the fixed frame member and which can displace over a prescribed range in a center axis line direction of the fixed frame member 11. A negative pressure actuator 13 closing a first limited passage 9 of a valve member 12 and pressing the valve member 12 to an advancement limit position with respect to the fixed frame member 11, also opening the first limited passage 9 of the valve member 12 and pressing the valve member 12 to a retreat limit position with respect to the fixed frame member 11, is disposed at another end side of a cylindrical member 2. A projection part 22 displacing and opening the valve member 12 with respect to the fixed frame member 11 based on compression direction deformation exceeding a prescribed quantity of an elastic member 3 is provided on a core member 1, projecting to a partition member side. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、内部に封入した非圧縮性の液体の流動に基いて、広範囲の入力振動同波数に対してすぐれた振動減衰機能および防振機能を発揮することができる防振装置、なかでも、液入り防振装置に関するものであり、たとえばエンジンマウントとして適用されて、２０〜４０Ｈｚの振動数のアイドリング振動（振幅：０．０５〜０．２ｍｍ）、５〜２０Ｈｚの振動数のエンジンシェイク振動（振幅：０．５〜１ｍｍ）のそれぞれを有効に減衰および防振し、併せて、車両の加速時のエンジンの沈み込み変位振動に起因する動的ばね定数の増加を効果的に抑制する技術を提案するものである。 This invention is based on the flow of an incompressible liquid sealed inside, and is a vibration isolator capable of exhibiting an excellent vibration damping function and a vibration isolating function for a wide range of input vibrational harmonics, among others, The present invention relates to an anti-vibration device with liquid, and is applied as an engine mount, for example, idling vibration (amplitude: 0.05 to 0.2 mm) with a frequency of 20 to 40 Hz, engine shake vibration with a frequency of 5 to 20 Hz ( (Amplitude: 0.5 to 1 mm) is effectively damped and vibration-proofed, and at the same time, a technique for effectively suppressing an increase in the dynamic spring constant caused by the subduction displacement vibration of the engine during vehicle acceleration. It is what we propose.

エンジンマウント等として用いられる液入り防振装置としては、たとえば特許文献１に開示されたものがある。 As an anti-vibration device with a liquid used as an engine mount or the like, for example, there is one disclosed in Patent Document 1.

これは、「大きな振動荷重の入力時に受圧室に発生する過大な負圧を平衡室に逃がすための通路を安定して開閉制御することが出来、特にかかる通路の開閉作動特性を容易に且つ高精度に設定することの出きる、新規な構造の流体封入式防振装置を提供すること。」を課題として、「受圧室を挟んで対向位置される仕切部材と第一の取付部材のうち一方には透孔を、他方には嵌入部を形成して、この嵌入部を利用して受圧室と平衡室を短い通路長で連通する接続流路を形成すると共に、振動入力に際して第一の取付部材と第二の取付部材とが相対変位するのに伴って、嵌入部が出入方向に変位することにより接続流路を遮断状態から連通状態に切り換える弁手段を、嵌入部の透孔への嵌め入れ部分に形成した。」ものである。 This is because “the passage for excessively negative pressure generated in the pressure receiving chamber when a large vibration load is input to the equilibrium chamber can be stably opened and closed. “Providing a fluid-filled vibration isolator having a novel structure that can be set with high accuracy”, “One of the partition member and the first mounting member that are opposed to each other across the pressure receiving chamber” A through hole is formed on the other side, and an insertion part is formed on the other side. By using this insertion part, a connection channel that connects the pressure receiving chamber and the equilibrium chamber with a short passage length is formed, and the first mounting is performed when vibration is input. As the member and the second mounting member are relatively displaced, the valve means for switching the connection flow path from the cut-off state to the communication state by the displacement of the fitting portion in the loading / unloading direction is fitted into the through-hole of the fitting portion. It was formed in the insert part.

そして、この防振装置では、「入力される振動振幅の大きさ延いては第一の取付部材と第二の取付部材の相対的な変位量の大きさに基づいて、かかる大きさが予め設定された値より大きくなった場合に、接続流路を遮断している弁手段が連通状態に切り換えられる。その結果、受圧室に発生した負圧が、オリフィス通路よりも流通抵抗が小さい接続流路を通じて平衡室に逃がされて解消されることとなり、受圧室における過大な負圧が回避される結果、キャビテーションに起因すると考えられる異音や衝撃などの不具合が解消され得るのである。」とする。 In this vibration isolator, the magnitude of the input vibration amplitude is set in advance based on the relative displacement amount of the first mounting member and the second mounting member. The valve means that shuts off the connection flow path is switched to the communication state when the value exceeds the measured value, so that the negative pressure generated in the pressure receiving chamber has a smaller flow resistance than the orifice passage. As a result, the excessive negative pressure in the pressure receiving chamber is avoided, and as a result, problems such as abnormal noise and impact that may be caused by cavitation can be eliminated. .

特開２００７−２７０９１０号公報JP 2007-270910 A

ところで、この防振装置は、エンジンシェイク振動に対しては、オリフィス通路を流動する液体の共振作用によって高減衰作用を発揮できるものの、オリフィス通路のチューニング周波数より高周波数のアイドリング振動や、走行こもり音振動に対しては、受圧室に惹起される圧力変動を液圧吸収機構で吸収、軽減することで、それらの振動による、装置の動的ばね定数の増加を抑えるだけのものであるので、この防振装置によっては、アイドリング振動に対する高い減衰機能の発揮は所期し得べくもなく、その上、車両の加速走行時の、エンジン沈み込み変位振動に伴う動的ばね定数の増加を防止できないという問題があった。 By the way, although this vibration isolator can exhibit a high damping action against the engine shake vibration by the resonance action of the liquid flowing in the orifice passage, idling vibration higher than the tuning frequency of the orifice passage, and traveling noise For vibrations, the pressure fluctuation induced in the pressure receiving chamber is absorbed and reduced by the hydraulic pressure absorption mechanism, so that the increase in the dynamic spring constant of the device due to those vibrations is only suppressed. Depending on the anti-vibration device, the high damping function against idling vibration cannot be expected, and the dynamic spring constant cannot be prevented from increasing due to the subduction displacement vibration when the vehicle is accelerated. was there.

この発明は、従来技術が抱えるこのうような問題点を解決することを課題とするものであり、それの目的とするところは、エンジンシェイク振動およびアイドリング振動のいずれをも効果的に減衰するとともに防振し、また、車両の加速走行時の動的ばね定数の増加を有効に抑制できる防振装置を提供するにある。 The present invention has an object to solve such problems of the prior art, and the object of the present invention is to effectively attenuate both engine shake vibration and idling vibration. An object of the present invention is to provide an anti-vibration device capable of preventing vibration and effectively suppressing an increase in dynamic spring constant during acceleration of the vehicle.

この発明の防振装置は、振動発生側部材もしくは振動伝達側部材のいずれか一方側に連結されるコア部材および、他方側に連結される筒状部材のそれぞれを設け、コア部材の外周面と、筒状部材の一方の端部分の内周面とを、筒状部材の他端側に向けて内径が漸増する、外面輪郭形状が、截頭角錐台状、截頭円錐台状等の截頭錐台状をなす、ゴム材料等からなる弾性部材により、全周にわたって液密に連結するとともに、筒状部材の他端側を、これもゴム材料等からなるダイアフラムによって液密に封止し、少なくとも、このダイアフラムと、内周面に弾性被膜層を設けた、もしくは設けない筒状部材と、弾性部材、ときには、それらに加えて、弾性部材から露出することのあるコア部材とで囲繞されるスペースを、たとえば、水、アルキレングリコール、ポリアルキレングリコール、シリコーンオイル等の非圧縮性の液体を封入した流体室とし、この流体室を、筒状部材の内周面にかしめ固定等によって取付けた剛性の仕切部材により、弾性部材側に位置する主液室と、ダイアフラム側に位置する副液室とに区分し、
それらの両液室を、アイドリング振動の減衰をもたらす第１の制限通路および、エンジンシェイク振動の減衰をもたらす第２の制限通路のそれぞれで、相互に独立させて連通させ、
前記仕切部材を、筒状部材に取付けられて、たとえば、筒状部材との協働下で第２の制限通路を区画する固定枠部材と、この固定枠部材内に、固定枠部材から間隔をおいて、周方向の複数個所でゴム材料等によって連結されてフローティング支持されて、第１の制限通路の区画に寄与し、固定枠部材の中心軸線方向に、所定の範囲にわたって変位可能な弁部材とで構成し、
筒状部材の他端側に、弁部材の第１の制限通路をそれの開口端で閉止するとともに、その弁部材を、固定枠部材に対して進出限位置に押圧する一方、弁部材の第１の制限通路を開放するとともに、その弁部材を、固定枠部材に対して後退限位置に押圧する負圧アクチュエータを配設し、
前記コア部材に、仕切部材側へ突出して、前記弾性部材の所定量を越える圧縮方向の変形に基いて、弁部材を、固定枠部材に対して開放変位させる、たとえば、ゴム材料等の男性材料からなる突部を設けてなるものである。 The vibration isolator of the present invention includes a core member connected to one side of the vibration generation side member or the vibration transmission side member and a cylindrical member connected to the other side, and an outer peripheral surface of the core member The inner surface of one end portion of the cylindrical member gradually increases toward the other end of the cylindrical member, and the outer surface contour shape is a truncated pyramid, truncated frustoconical, etc. An elastic member made of a rubber material or the like in the shape of a truncated cone is connected in a liquid-tight manner over the entire circumference, and the other end of the cylindrical member is liquid-tightly sealed by a diaphragm also made of a rubber material or the like. And at least the diaphragm, a cylindrical member provided or not provided with an elastic coating layer on the inner peripheral surface, and an elastic member, and sometimes a core member that may be exposed from the elastic member. For example, water, archile The fluid chamber is filled with an incompressible liquid such as glycol, polyalkylene glycol, or silicone oil, and the fluid chamber is attached to the inner peripheral surface of the cylindrical member by a rigid partition member, etc. Is divided into a main liquid chamber located on the side and a sub liquid chamber located on the diaphragm side,
The two liquid chambers communicate with each other independently of each other in each of a first restriction passage that causes damping of idling vibration and a second restriction passage that causes damping of engine shake vibration.
The partition member is attached to the cylindrical member, for example, a fixed frame member that divides the second restriction passage in cooperation with the cylindrical member, and a space from the fixed frame member in the fixed frame member. In this case, the valve member is connected to a plurality of portions in the circumferential direction by a rubber material or the like and is float-supported so as to contribute to the section of the first restriction passage and to be displaced over a predetermined range in the central axis direction of the fixed frame member. And
On the other end side of the tubular member, the first restriction passage of the valve member is closed at its open end, and the valve member is pressed to the advance limit position with respect to the fixed frame member, while the first of the valve member A negative pressure actuator that opens the restriction passage of 1 and presses the valve member to the retreat limit position with respect to the fixed frame member;
The core member protrudes toward the partition member and displaces the valve member relative to the fixed frame member based on deformation in the compression direction exceeding a predetermined amount of the elastic member. For example, male material such as rubber material The protrusion which consists of is provided.

かかる防振装置では、仕切部材の固定枠部材に、弁部材の、所定量を越える進退変位を、たとえば弾性シール部材を介して拘束するそれぞれの当接部分を設けることが、仕切部材の、固定枠部材と弁部材との間を通る、封入液体の意図しない流動を、衝突音および衝撃の発生なしに阻止する上で好ましい。
そしてこのことは、仕切部材の弁部材に、その弁部材の、固定枠部材に対する所定量を越える進退変位を、これもたとえば弾性シール部材を介して拘束するそれぞれの当接部分ンを設けた場合にも同様である。 In such an anti-vibration device, it is possible to fix the partition member by providing the fixing frame member of the partition member with respective contact portions that restrain the valve member from advancing and retracting beyond a predetermined amount, for example, via an elastic seal member. This is preferable for preventing an unintended flow of the sealed liquid passing between the frame member and the valve member without causing a collision sound and an impact.
And this means that when the valve member of the partition member is provided with respective contact portions that restrain the valve member from advancing and retreating over a predetermined amount relative to the fixed frame member, for example, via an elastic seal member. The same applies to

ここで好ましくは、負圧アクチュエータを、負圧導入室と、この負圧導入室内に配置したリターンスプリングと、ダイアフラムに貫通させて配置されて、弁部材の第１の制限通路の周りに接触する剛性プレートと、弁部材に設けられ、剛性プレートの、弁部材から離隔する方向の後退変位に当って、その剛性プレートに掛合するフック状部材とで構成する。 Preferably, the negative pressure actuator is disposed so as to penetrate the negative pressure introduction chamber, a return spring disposed in the negative pressure introduction chamber, and the diaphragm, and contact the first restriction passage of the valve member. A rigid plate and a hook-shaped member that is provided on the valve member and engages with the rigid plate when the rigid plate moves backward in a direction away from the valve member.

これによれば、負圧導入室内へ、所要の負圧と大気圧とを所要のタイミングで供給することにより、剛性プレートによる、第１の制限通路の開閉を所要のタイミングで所期した通りに確実に行うことができ、また、簡単な構造の下で、弁部材の進退限位置への変位を、円滑かつ迅速に行わせることができる。 According to this, by supplying the required negative pressure and atmospheric pressure to the negative pressure introduction chamber at the required timing, the opening and closing of the first restriction passage by the rigid plate is performed at the required timing as expected. It is possible to reliably perform the displacement, and the valve member can be smoothly and quickly displaced to the advanced / retracted position under a simple structure.

ところで、負圧アクチュエータの負圧導入室は、負圧アクチュエータの中央部分に位置してリターンスプリングの着座を許容する、頂壁付きの剛性筒状部材と、この剛性筒状部材の周りに気密に固着されて、外周縁を、剛性筒状部材と一体をなす、または、それとは別体になる、底壁付きハウジングの筒状部に気密に連結した可撓膜体とで構成することが好ましく、この構成によれば、負圧アクチュエータの応答性を十分に高めるとともに、先の剛性プレートを、その頂壁付き剛性筒状部材に連結することで、剛性プレートの作動の確実性を十分に担保することができる。 By the way, the negative pressure introduction chamber of the negative pressure actuator is located at the central portion of the negative pressure actuator and allows a return spring to be seated, and a rigid cylindrical member with a top wall is airtight around the rigid cylindrical member. It is preferable that the outer peripheral edge is constituted by a flexible film body that is fixedly attached to the cylindrical portion of the housing with the bottom wall and that is integrated with the rigid cylindrical member or separated from the rigid cylindrical member. According to this configuration, the responsiveness of the negative pressure actuator is sufficiently enhanced, and the rigidity of the rigid plate is sufficiently secured by connecting the rigid plate to the rigid cylindrical member with the top wall. can do.

またここで、負圧アクチュエータの、剛性プレートを設けたロッドを、ダイアフラムに貫通させるとともに、そのダイアフラムに固着させることは、ダイアフラムの変形代が十分に存在して、副液室の自由な拡縮変形が担保される条件下で、ダイアフラムとロッドとの間からの封入液体の洩出を確実に防止することが好ましい。 In addition, the rod with the rigid plate of the negative pressure actuator penetrates the diaphragm and is fixed to the diaphragm, so that there is a sufficient amount of diaphragm deformation, and the sub liquid chamber can be freely expanded and contracted. It is preferable to reliably prevent leakage of the encapsulated liquid from between the diaphragm and the rod under a condition that guarantees the above.

そしてこの場合、上記のロッドは、頂壁付きの剛性筒状部材、なかでも、その頂壁から突出させて設けることが、作動の確実性を図る上でより好ましい。 In this case, the rod is preferably provided so as to protrude from the top wall of the rigid cylindrical member with a top wall, in particular, in order to ensure the reliability of the operation.

この発明の防振装置では、それをエンジンマウントとして適用して、たとえば、コア部材をエンジン側の部材に、そして、筒状部材を車体側の部材にそれぞれ連結した状態で、車両の停止時のアイドリング振動（中周波（２０〜４０Ｈｚ）中振幅（０．０５〜０．２ｍｍ）の振動）の入力に対しては、負圧アクチュエータを作動させて、仕切部材の弁部材に形成した第１の制限通路の開口端を開放させ、これにより、主液室内および副液室内のそれぞれの液体を、十分な横断面積をもつ第１の制限通路を経て、ダイアフラムの自由な変形下で流動させることにより、第１の制限通路のチューニング周波数での、その通路内の液体の液柱共振、流動抵抗等に基き、アイドリング振動を有効に減衰することができる。
しかも、このアイドリング振動は、主には、ダイアフラム全体で共振することで、少なくともその共振周波数および、その近傍の周波数で、車体側部材に対しても効果的に低動ばね化することができる。 In the vibration isolator of the present invention, it is applied as an engine mount. For example, in a state where the core member is connected to the engine side member and the cylindrical member is connected to the vehicle body side member, For input of idling vibration (vibration with medium frequency (20 to 40 Hz) and medium amplitude (0.05 to 0.2 mm)), a negative pressure actuator is operated to form a first member formed on the valve member of the partition member. By opening the open end of the restriction passage, thereby allowing the liquid in the main liquid chamber and the sub liquid chamber to flow under the free deformation of the diaphragm through the first restriction passage having a sufficient cross-sectional area. The idling vibration can be effectively damped based on the liquid column resonance, flow resistance, etc. of the liquid in the passage at the tuning frequency of the first restriction passage.
In addition, the idling vibration can resonate with the entire body of the diaphragm, so that the low dynamic spring can be effectively reduced for the vehicle body side member at least at the resonance frequency and in the vicinity thereof.

この一方で、車両の走行時の、５〜２０Ｈｚのエンジンシェイク振動（低周波大振幅（０．５〜１ｍｍ）の振動）の入力に対しては、負圧アクチュエータ内に大気圧を導入することで、内蔵ばね手段等の作用下で、負圧アクチュエータをもって、第１の制限通路の開口端を実質的に閉止して第１の制限通路を通る液体の流動を阻止するとともに、両液室内の液体を、第２の制限通路を経て、これもまたダイアフラムの自由な変形下で流動させることにより、この第２の制限通路のチューニング周波数での、その通路内の液体の液柱共振等に基いて、エンジンシェイク振動を効果的に減衰するとともに、低動ばね化することができる。
なお、この第２の制限通路は、アイドリング振動のような、より高い周波数（２０〜４０Ｈｚ）の振動に対しては、いわゆる目詰り状態となって、それぞれの液室内の液体の流動を許容し得ない状態となる。 On the other hand, atmospheric pressure is introduced into the negative pressure actuator for the input of 5 to 20 Hz engine shake vibration (vibration with low frequency and large amplitude (0.5 to 1 mm)) during vehicle travel. Then, under the action of the built-in spring means or the like, a negative pressure actuator is used to substantially close the opening end of the first restriction passage to prevent the flow of liquid through the first restriction passage, By causing the liquid to flow through the second restricting passage, which is also under free deformation of the diaphragm, the liquid column resonance, etc. of the liquid in the passage at the tuning frequency of the second restricting passage is used. Thus, the engine shake vibration can be effectively damped and the dynamic spring can be reduced.
The second restriction passage is in a so-called clogged state with respect to vibrations having a higher frequency (20 to 40 Hz) such as idling vibrations, and allows the flow of liquid in each liquid chamber. It will be in an unobtainable state.

しかも、この防振装置の負圧アクチュエータは、第１の制限通路の開放状態の下では、弁部材を、固定枠部材に対して、好ましくは弾性シール部材を介して後退限位置に押圧して、それらの間を、封入液体に対してシールし、一方、第１の制限通路の閉止状態の下では、弁部材を、固定枠部材に対して進出限位置に押圧して、それらの間を液密にシールして、弁部材と固定部材との間への、封入液体の意図しない流動を十分に阻止することにより、アイドリング振動およびエンジンシシェイク振動のいずれの振動入力に対しても、主液室と副液室との間の差圧の、不測の低下を防止して、振動減衰機能を効果的に発揮させることができる。 In addition, the negative pressure actuator of the vibration isolator depresses the valve member against the fixed frame member, preferably through the elastic seal member, to the retreat limit position when the first restriction passage is open. , Sealing between the sealed liquid, while the first restriction passage is closed, the valve member is pushed to the advance limit position with respect to the fixed frame member, Sealing liquid tightly to prevent unintentional flow of the sealed liquid between the valve member and the fixed member, so that it can be used for any vibration input of idling vibration and engine shake vibration. An unexpected decrease in the differential pressure between the liquid chamber and the auxiliary liquid chamber can be prevented, and the vibration damping function can be effectively exhibited.

さらにこの防振装置では、車両の走行時の、第１の制限通路の閉止下での車両の加速走行によってエンジンが沈み込み変位しつつ振動して、弾性部材が、仕切部材側へ所定量を越えて圧縮変形された場合、好ましくは弾性材料からなる突部が、弁部材を、負圧アクチュエータの押圧力に抗し、固定枠部材に対してダイアフラム側へ押圧して、周方向の複数個所で、固定枠部材に対してフローティング支持したその弁部材を、固定枠部材から開放変位させ、その弁部材と固定枠部材との間に、液体の流動を許容できる隙間を形成することになるので、主および副液室の内圧増加分は、その隙間を経て対抗液室側へ逃げることになり、結果として、装置の動的ばね定数の増加は効果的に防止されることになる。 Further, in this vibration isolator, when the vehicle travels, the engine sinks and vibrates while accelerating the vehicle while the first restriction passage is closed, and the elastic member vibrates a predetermined amount toward the partition member. When compressed and deformed beyond this, the protrusions preferably made of an elastic material resist the pressing force of the negative pressure actuator and press the fixed frame member toward the diaphragm side, thereby Therefore, the valve member that is floatingly supported with respect to the fixed frame member is opened and displaced from the fixed frame member, and a gap that allows the flow of liquid is formed between the valve member and the fixed frame member. The increase in the internal pressure of the main and sub liquid chambers escapes to the counter liquid chamber side through the gap, and as a result, an increase in the dynamic spring constant of the apparatus is effectively prevented.

ところで、車両の加速走行時に防振装置に入力される高周波数の振動に対しては、第２の制限通路は、それの開口端が開放下にあってなお、いわゆる目詰り状態となって、通路内の液体は流動を阻止されるので、上述したような弁部材の開放変位なしには、加速走行時の、動的ばね定数の著しい増加が不可避となる。 By the way, for high-frequency vibrations input to the vibration isolator during acceleration of the vehicle, the second restricted passage is in a so-called clogged state even though its open end is open. Since the liquid in the passage is prevented from flowing, a significant increase in the dynamic spring constant during accelerating running is unavoidable without the above-described opening displacement of the valve member.

このような装置において、仕切部材の固定枠部材、または、仕切部材の弁部材に、弁部材の、所定量を越える進退変位を拘束するそれぞれの当接部分を設けるときは、封入液体を、第１および第２のそれぞれの制限通路に流動させて、振動の減衰をもたらす場合の、主・副液室内の圧差の意図しない低下を、簡単な構造の下に有効に防止して、所期した通りの振動減衰機能を発揮させることができる。 In such a device, when providing each abutment portion for restraining the forward / backward displacement of the valve member exceeding a predetermined amount on the fixed frame member of the partition member or the valve member of the partition member, It is intended to effectively prevent an unintended decrease in the pressure difference in the main and sub liquid chambers when flowing into the first and second restricting passages to cause vibration damping, and to effectively prevent under the simple structure. The vibration damping function of the street can be exhibited.

またここで、負圧アクチュエータを、負圧導入室と、この負圧導入室内に配置したリターンスプリングと、ダイアフラムに貫通させて配置されて、弁部材の第１の制限通路の周りに、好ましくは、弾性シール部材を介して間接的に接触する剛性プレートと、弁部材に設けられ、剛性プレートの、弁部材から離隔する方向の後退変位に当って、その剛性プレートの、たとえば周縁部分に掛合する、内向きフランジを有する筒状部材とすることもできるフック状部材とで構成した場合は、負圧導入室内へ、所要の負圧と大気圧とのそれぞれを所要のタイミングで交互に供給することにより、剛性プレートによる、第１の制限通路の開閉を所期した通りに正確に行うことができ、また、簡単な構造によって、弁部材の、固定枠部材に対する進退限位置への変位を、円滑かつ確実に、しかも、迅速に行って、不測の液洩れに起因する、振動減衰機能の低下のおそれを効果的に取り除くことができる。 Also, here, the negative pressure actuator is disposed so as to penetrate the negative pressure introduction chamber, the return spring disposed in the negative pressure introduction chamber, and the diaphragm, and preferably around the first restriction passage of the valve member. A rigid plate that is indirectly contacted via the elastic seal member, and provided on the valve member, and engages with, for example, a peripheral portion of the rigid plate when the rigid plate moves backward in a direction away from the valve member. When configured with a hook-shaped member that can also be a cylindrical member having an inward flange, each of the required negative pressure and atmospheric pressure is alternately supplied to the negative pressure introduction chamber at the required timing. Thus, the opening and closing of the first restriction passage by the rigid plate can be performed exactly as expected, and the valve member can be advanced and retracted relative to the fixed frame member by a simple structure. The displacement of the, smoothly and reliably, yet, quickly performed, resulting from accidental liquid leakage, a risk of decrease in vibration damping function can effectively get rid of.

そして、負圧アクチュエータの負圧導入室を、アクチュエータの中央部分に位置してリターンスプリングの着座を許容する、頂壁付きの剛性筒状部材と、この剛性筒状部材の周りに内周縁を気密に固着されて、外周縁を、剛性筒状部材と一体になる、または、それとは別体になる底壁付きハウジングの筒状部内周面に気密に連結した可撓膜体とで構成したときは、可撓膜体の高い変形性と、剛性筒状部材の定形性との協働下で、負圧アクチュエータの応答性を高め、また、前記剛性プレートの、頂壁付き剛性筒状部材への連結下で、その剛性プレートの作動の確実性を担保することができる。 The negative pressure introduction chamber of the negative pressure actuator is positioned at the central portion of the actuator to allow the return spring to be seated, and a rigid cylindrical member with a top wall, and the inner peripheral edge around the rigid cylindrical member is airtight. When the outer peripheral edge is composed of a flexible membrane body that is integrated with the rigid cylindrical member or hermetically connected to the inner peripheral surface of the cylindrical portion of the housing with the bottom wall that is separate from the rigid cylindrical member. Increases the responsiveness of the negative pressure actuator in cooperation with the high deformability of the flexible membrane and the regularity of the rigid cylindrical member, and the rigid plate has a top wall with a rigid cylindrical member. Therefore, the certainty of the operation of the rigid plate can be ensured.

これらの場合にあって、負圧アクチュエータの、剛性プレートを設けた剛性のロッドを、ダイアフラムに貫通させるとともに、そのダイアフラムに固着させたときは、ダイアフラムが十分な変形代を有し、副液室の自由な拡縮変形が担保される限りにおいて、防振装置の主および副液室のそれぞれを所期した通りに機能させることができ、ダイアフラムとロッドとの間からの、封入液体の洩出のおそれを十分に取り除くことができる。
いいかえれば、ダイアフラムに貫通させたロッドを、ダイアフラムに固着させないときは、ロッドの、ダイアフラムに対する相対変位は可能になるも、それらの間からの封入液体の洩出のおそれが生じることになる。 In these cases, when the rigid rod provided with the rigid plate of the negative pressure actuator is passed through the diaphragm and fixed to the diaphragm, the diaphragm has a sufficient deformation margin, and the secondary liquid chamber As long as the free expansion / contraction deformation is guaranteed, each of the main and sub liquid chambers of the vibration isolator can function as expected, and leakage of the sealed liquid from between the diaphragm and the rod can be prevented. The fear can be removed sufficiently.
In other words, when the rod penetrated through the diaphragm is not fixed to the diaphragm, the relative displacement of the rod with respect to the diaphragm is possible, but there is a risk of leakage of the sealed liquid from between them.

ここにおいて、剛性のロッドを、頂壁付きの剛性筒状部材、なかでも頂壁から突出させて設けたときは、剛性プレートの変位を剛性筒状部材の変位に簡易に追随させて、第１の制限通路の開閉作動および弁部材の進退変位の確実性をより十分に担保することができる。 Here, when the rigid rod is provided so as to protrude from the top wall with a rigid wall member having a top wall, the displacement of the rigid plate can be easily followed by the displacement of the rigid tubular member. The certainty of the opening / closing operation of the restriction passage and the forward / backward displacement of the valve member can be sufficiently ensured.

この発明の一の実施形態を示す、中心軸線を含む縦断面図である。It is a longitudinal section showing a central axis showing one embodiment of this invention. 図１に示す装置を、エンジンシェイク振動の減衰姿勢で示す縦断面図である。It is a longitudinal cross-sectional view which shows the apparatus shown in FIG. 1 in the damping posture of an engine shake vibration. 図１に示す装置を、車両の加速走行時の動ばね抑制姿勢で示す縦断面図である。It is a longitudinal cross-sectional view which shows the apparatus shown in FIG. 1 in the dynamic spring suppression attitude | position at the time of the acceleration running of a vehicle.

この発明の実施形態では、図１に縦断面図で示すように、エンジンその他の振動発生側部材、もしくは、自動車車体等の振動伝達側部材のいずれか一方側に連結されるコア部材１および、他方側に連結される筒状部材２のそれぞれを設け、コア部材１の外周面と、筒状部材２の一方の端部分の内周面、図では、倒立円錐台形状もしくは、倒立角錐台形状をなす内周面とを、ゴム、エラストマ、プラスチック等にて構成することができ、筒状部材の他端側に向けて内径が漸増する、外面輪郭形状が、截頭角錐台状、截頭円錐台状等の截頭錐台状をなす弾性部材３により、全周にわたって液密に連結するとともに、筒状部材２の他端側を、これもゴム等からなるダイアフラム４によって液密に封止する。
なお、図に示すところでは、筒状部材２の等径部分２ａの内周面を、ダイアフラム４の配設位置の近傍まで、弾性部材３によってライニングすることで、その等径部分２ａに弾性部材３からなる弾性被膜層３ａを設けることとしているが、この弾性被膜層３ａは必須のものではない。 In the embodiment of the present invention, as shown in a longitudinal sectional view in FIG. 1, a core member 1 connected to one side of a vibration generating side member such as an engine or other vibration generating member or an automobile body, and Each of the cylindrical members 2 connected to the other side is provided, and the outer peripheral surface of the core member 1 and the inner peripheral surface of one end portion of the cylindrical member 2, in the figure, an inverted truncated cone shape or an inverted truncated pyramid shape The inner peripheral surface can be made of rubber, elastomer, plastic, etc., and the inner surface gradually increases toward the other end of the cylindrical member. The elastic member 3 having a truncated cone shape such as a truncated cone shape is liquid-tightly connected over the entire circumference, and the other end side of the cylindrical member 2 is liquid-tightly sealed by a diaphragm 4 made of rubber or the like. Stop.
In the figure, the inner circumferential surface of the equal diameter portion 2a of the cylindrical member 2 is lined by the elastic member 3 up to the vicinity of the position where the diaphragm 4 is disposed, so that the elastic member is attached to the equal diameter portion 2a. 3 is provided, but this elastic coating layer 3a is not essential.

そしてここでは、少なくとも、ダイアフラム４と、弾性部材３の弾性被膜層３ａをも含む筒状部材２、および弾性部材３とで囲繞されるスペース、ときには、それらに加えて、弾性部材３から露出することもあるコア部材１とで囲繞されるスペースを、非圧縮性の所要の液体を封入した流体室５とし、そして、この流体室５を、筒状部材２の内周面にかしめ固定等によって固定ないしは固着した剛性の仕切部材６によって、弾性部材３側に位置する主液室７と、ダイアフラム４側に位置する副液室８とに区画するとともに、それらの両液室７，８を、図では仕切部材６に設けられて、アイドル振動の減衰をもたらす第１の制限通路９および、エンジンシェイク振動の減衰をもたらす、通常は、前記制限通路９より横断面積が小さく長さが長い第２の制限通路１０のそれぞれで、相互に独立させて連通させる。
なおここで、仕切部材６の周面溝と、筒状部材２の内周面との協働下で区画される第２の制限通路１０は、延在方向の一端に設けた図示しない切欠き等を経て主液室７に開口する一方で、他端に設けた図示しない切欠き等を経て副液室８に開口する。 Here, at least the space surrounded by the diaphragm 4, the cylindrical member 2 including the elastic coating layer 3 a of the elastic member 3, and the elastic member 3, sometimes in addition to them, exposed from the elastic member 3. The space surrounded by the core member 1 may be a fluid chamber 5 filled with a required incompressible liquid, and the fluid chamber 5 is fixed to the inner peripheral surface of the cylindrical member 2 by caulking and fixing. A rigid or fixed rigid partition member 6 divides a main liquid chamber 7 located on the elastic member 3 side and a sub liquid chamber 8 located on the diaphragm 4 side. In the figure, the first restricting passage 9 is provided in the partition member 6 to attenuate the idle vibration, and the engine shake vibration is attenuated. Usually, the cross-sectional area is smaller and the length is longer than the restricting passage 9. In each of the second limiting passage 10, communicating by mutually independent.
Here, the second restriction passage 10 defined under the cooperation of the peripheral groove of the partition member 6 and the inner peripheral surface of the cylindrical member 2 is a notch (not shown) provided at one end in the extending direction. Etc., and opens to the main liquid chamber 7, while opening to the sub liquid chamber 8 through a notch (not shown) provided at the other end.

またここでは、仕切部材６を、筒状部材２の等径部分２ａの内周面に直接的に固定ないしは固着されて、第２の制限通路１０の区画に寄与する固定枠部材１１と、この固定枠部材１１内に、それから所定の間隔をおいて、ゴム材料等の弾性材料１２ａによって連結されて、その固定枠部材１１に対して、周方向の複数個所でフローティング支持されるとともに、第１の制限通路９を区画する弁部材１２とで構成し、この弁部材１２を、固定枠部材１１の中心軸線方向に、所定の範囲にわたって進退変位可能とする。 Further, here, the partition member 6 is directly fixed or fixed to the inner peripheral surface of the equal-diameter portion 2 a of the cylindrical member 2, and the fixed frame member 11 that contributes to the section of the second restriction passage 10, and this The fixed frame member 11 is connected by an elastic material 12a such as a rubber material at a predetermined interval from the fixed frame member 11, and is floatingly supported at a plurality of locations in the circumferential direction with respect to the fixed frame member 11. The valve member 12 that divides the restriction passage 9 is configured to be capable of moving forward and backward over a predetermined range in the direction of the central axis of the fixed frame member 11.

ここで、弁部材１２の、固定枠部材１１に対する、所定の範囲にわたる進退変位は、たとえば図示のように、固定枠部材１１に、弁部材１２に当接する、それぞれの当接部分としての上あご部１１ａおよび下あご部１１ｂを全周にわたって設けること、または、弁部材１２に、固定枠部材１１に当接する、それぞれの当接部分としての下あご部および上あご部を全周にわたり設けることによって特定することができる。
そして、これらのいずれの場合にあっても、弁部材１２と固定枠部材１１との当接個所に弾性シール部材を配設したときは、それら両者の衝突音および衝突衝撃の発生を防止するとともに、それらの間からの、封入液体の不測の洩出をより確実に防止することができる。 Here, the forward / backward displacement of the valve member 12 with respect to the fixed frame member 11 over a predetermined range is, for example, as shown in the figure, the upper jaw as the respective contact portions that contact the fixed frame member 11 and the valve member 12. By providing the part 11a and the lower jaw part 11b over the entire circumference, or by providing the valve member 12 with the lower jaw part and the upper jaw part as the respective contact parts that contact the fixed frame member 11 over the entire circumference. Can be identified.
In any of these cases, when the elastic seal member is disposed at the contact portion between the valve member 12 and the fixed frame member 11, the generation of the collision noise and the collision impact between them is prevented. Further, it is possible to more reliably prevent unexpected leakage of the sealed liquid from between them.

さらにこの防振装置では、筒状部材２の他端側に負圧アクチュエータ１３を配設し、この負圧アクチュエータ１３を、弁部材１２の第１の制限通路９を、それのダイアフラム４側の開口端で閉止するとともに、その弁部材１２を、固定枠部材１１に対して進出限位置まで押圧させ、また、弁部材１２の第１の制限通路９のその開口端を開放するとともに、弁部材１２を、固定枠部１１に対して後退限位置まで押圧させるべく機能させる。 Further, in this vibration isolator, a negative pressure actuator 13 is disposed on the other end side of the cylindrical member 2, and this negative pressure actuator 13 is connected to the first restriction passage 9 of the valve member 12 on the diaphragm 4 side thereof. The valve member 12 is closed at the open end, the valve member 12 is pressed to the advanced limit position with respect to the fixed frame member 11, the open end of the first restricting passage 9 of the valve member 12 is opened, and the valve member is opened. 12 is made to function so as to press the fixed frame portion 11 to the retreat limit position.

これがため、図に示すところでは、負圧アクチュエータ１３を、図示しない負圧供給源等に連通される負圧導入室１４と、この負圧導入室１４内に配設したリターンスプリング１５と、ダイアフラム４に貫通させて配置されて、弁部材１２の第１の制限通路９の開口の周りに、好ましくは弾性シール部材１６ａを介してその開口の全周にわたって間接的に接触する剛性プレート１６と、弁部材１２に設けられて、剛性プレート１６の、弁部材１２から離隔する方向の後退変位に当って、その剛性プレート１６の、たとえば周縁部分に、それの全周にわたってまたは、周方向に間隔をおいて掛合するフック状部材１７とで構成する。
なお、図に示すところでは、フック条部材１７に、主液室７と副液室８との間での、封入液体の流動を許容する貫通孔を設けているも、剛性プレート１６の周りに複数本のフック状部材１７を配設するときは、図示の貫通孔は必須のものではない。 For this reason, as shown in the drawing, the negative pressure actuator 13 includes a negative pressure introduction chamber 14 communicated with a negative pressure supply source (not shown), a return spring 15 disposed in the negative pressure introduction chamber 14, and a diaphragm. 4, a rigid plate 16 arranged through the first restriction passage 9 of the valve member 12 and indirect contact with the entire circumference of the opening, preferably via an elastic seal member 16a, Provided in the valve member 12, when the rigid plate 16 is moved backwardly in a direction away from the valve member 12, the rigid plate 16, for example, a peripheral portion thereof is spaced over the entire circumference or in the circumferential direction. And a hook-like member 17 that engages with each other.
As shown in the figure, the hook member 17 is provided with a through-hole that allows the flow of the sealed liquid between the main liquid chamber 7 and the sub liquid chamber 8, but around the rigid plate 16. When a plurality of hook-shaped members 17 are provided, the illustrated through hole is not essential.

ところで、このような負圧アクチュエータ１３においてより好ましくは、所要の負圧および大気圧が供給される負圧導入室１４を、アクチュエータ１３の中央部分に位置してリターンスプリング１５の着座を許容する、頂壁付きの剛性筒状部材１８と、この剛性筒状部材１８の周り、図ではそれのフランジ部の周りに内周縁を気密に固着されて、外周縁を、剛性の筒状部材２と一体になる、または、製造上もしくは、組付け上の都合によってその筒状部材２とは別体に構成することもできる、底壁付きの筒状剛性ハウジング１９の筒状部１９ａの内周面に気密に連結した、ゴム材料等からなる可撓膜体２０とで構成し、また好ましくは、剛性プレート１６を設けた剛性のロッド２１を、頂壁付きの剛性筒状部材１８、なかでも、その頂壁から突出させて設け、そしてまた好ましくは、剛性プレート１６を設けた剛性ロッド２１を、頂壁付きの剛性筒状部材１８、なかでも、その頂壁から突出させて設け、そしてまた好ましくは、剛性プレート１６を設けた剛性ロッド２１を、ダイアフラム４に貫通させるとともに、そのダイアフラム４に固着させる。 By the way, in such a negative pressure actuator 13, more preferably, the negative pressure introduction chamber 14 to which a required negative pressure and atmospheric pressure are supplied is positioned at the central portion of the actuator 13 to allow the return spring 15 to be seated. A rigid cylindrical member 18 with a top wall and an inner peripheral edge thereof are hermetically fixed around the rigid cylindrical member 18 and around the flange portion in the figure, and the outer peripheral edge is integrated with the rigid cylindrical member 2. Or on the inner peripheral surface of the cylindrical portion 19a of the cylindrical rigid housing 19 with the bottom wall, which can be configured separately from the cylindrical member 2 for convenience of manufacture or assembly. It is composed of a flexible film body 20 made of a rubber material or the like that is hermetically connected, and preferably, a rigid rod 21 provided with a rigid plate 16 is connected to a rigid cylindrical member 18 with a top wall, among others From the top wall And preferably also a rigid rod 21 provided with a rigid plate 16 is provided protruding from the rigid cylindrical member 18 with a top wall, in particular its top wall, and also preferably a rigid plate The rigid rod 21 provided with 16 is passed through the diaphragm 4 and fixed to the diaphragm 4.

以上に述べたところに加えて、図示の防振装置では、コア部材１に、仕切部材６側へ突出して、弾性部材３の、所定量ｄを越える中心軸線方向の圧縮変形、たとえば、５ｍｍを越える、または、３〜１０ｍｍの範囲内のいずれかの所定値を越える圧縮変形に基いて、弁部材１２を、負圧アクチュエータ１３のリターンスプリング１５のばね力に抗して、固定枠部材１１に対して開放変位させる、たとえば、ゴム材料等の弾性材料からなる突部２２を設ける。 In addition to the above description, in the illustrated vibration isolator, the core member 1 protrudes toward the partition member 6 and the elastic member 3 is subjected to compressive deformation in the central axis direction exceeding a predetermined amount d, for example, 5 mm. Based on the compression deformation that exceeds or exceeds any predetermined value within the range of 3 to 10 mm, the valve member 12 is against the spring force of the return spring 15 of the negative pressure actuator 13 against the fixed frame member 11. On the other hand, a protrusion 22 made of an elastic material such as a rubber material, for example, is provided to be opened and displaced.

このように構成してなる防振装置では、車両の停止時の、エンジンからのアイドリング振動（２０〜４０Ｈｚ）の入力に対しては、図１に示すように、負圧アクチュエータ１３の負圧導入室１４内へ所定の負圧を供給して、頂壁付きの剛性筒状部材１８および剛性プレート１６のそれぞれを、リターンスプリング１５のばね力に抗して後退変位させ、これにより、剛性プレート１６を第１の制限通路９の開口から十分に距離変位させるとともに、その剛性プレート１６の、たとえば周縁部分のフック状部材１７への掛合下で、弁部材１２を、固定枠部材１１に対する、図示のような後退限位置まで変位させることで、第１の制限通路９の開口を大きく開放し、そして、弁部材１２と固定枠部材１１との間の隙間を十分に閉止する。 In the vibration isolator configured as described above, as shown in FIG. 1, the negative pressure of the negative pressure actuator 13 is introduced with respect to the input of idling vibration (20 to 40 Hz) from the engine when the vehicle is stopped. A predetermined negative pressure is supplied into the chamber 14 to cause the rigid cylindrical member 18 with the top wall and the rigid plate 16 to move backward against the spring force of the return spring 15. And the valve member 12 with respect to the fixed frame member 11 as shown in the figure under the engagement of the rigid plate 16 with, for example, the hook-like member 17 at the peripheral portion. By displacing to such a retreat limit position, the opening of the first restriction passage 9 is largely opened, and the gap between the valve member 12 and the fixed frame member 11 is sufficiently closed.

このような状態の下での、たとえば、コア部材１へのアイドリング振動の入力による、弾性部材３の変形に伴う、それぞれの液室７，８の液圧変動に対しては、高圧側の液室内の液体が第１の制限通路９を経て低圧側の液室内へ、ダイアフラム４の柔軟なる変形の下で、十分円滑に流動することになるので、アイドリング振動の入力に対し、動的ばね定数の増加を防止してすぐれた振動絶縁機能を発揮させることができ、また、制限通路９内の液体を、所要のアイドリング周波数で液柱共振させることにより、その共振周波数域で、アイドリング振動を有効に減衰させることができる。
なお、２０〜４０Ｈｚのこのようなアイドリング振動入力に対しては、エンジンシェイク振動（５〜２０Ｈｚ）用の第２の制限通路１０は実質的な目詰り状態にあって、その制限通路１０内の液体は流動を拘束されるので、液室７，８内の液体が、制限通路１０内を流動することに起因する液室内圧の意図しない低下による、振動減衰機能の低下は有効に防止されることになる。 Under such a state, for example, the liquid on the high-pressure side is not affected by the fluid pressure fluctuations in the fluid chambers 7 and 8 due to the deformation of the elastic member 3 due to the input of idling vibration to the core member 1. Since the liquid in the chamber flows sufficiently smoothly through the first restricting passage 9 into the liquid chamber on the low pressure side under the flexible deformation of the diaphragm 4, the dynamic spring constant with respect to the input of idling vibration It is possible to exhibit an excellent vibration isolation function by preventing the increase of the flow rate, and by making the liquid in the restricted passage 9 resonate with the liquid column at the required idling frequency, idling vibration is effective in the resonance frequency range. Can be attenuated.
For such idling vibration input of 20 to 40 Hz, the second restriction passage 10 for engine shake vibration (5 to 20 Hz) is substantially clogged, and the inside of the restriction passage 10 Since the liquid is restrained from flowing, a decrease in the vibration damping function due to an unintended decrease in the pressure in the liquid chamber caused by the liquid in the liquid chambers 7 and 8 flowing in the restriction passage 10 is effectively prevented. It will be.

この一方で、車両の走行中の、低周波大振幅（５〜２０Ｈｚ：０．５〜１ｍｍ）振動になるエンジンシェイクの振動に対しては、負圧アクチュエータ１３の負圧導入室１４内に大気圧を導入してリターンスプリング１５のばね力に基いて、剛性プレート１６を図２に示すように、第１の制限通路９の開口の密閉位置にもたらして、第１の制限通路９を通る液体の流動を阻止するとともに、弁部材１２を、固定枠部材１１に対する進出限位置まで変位させて、それらの両部材間を通る流体の流動を阻止する。
しかるに、このエンジンシェイク振動の入力時の、主副液室７，８内の液圧変化に対しては、それらの液室内の液体は、第２の制限通路１０を経て、これもまたダイアフラム４の変形下で、一方から他方へ円滑に流動することができる。
そして、制限通路１０を通る液体のこの流動に当っても、予め選択された共振周波数での、通路１０内の液体の液柱共振、通路１０内の液体が、その通路から受ける流動抵抗等に基いて振動が減衰されることになり、また、動的ばね定数の増加が抑制されることになる。 On the other hand, the vibration of the engine shake that becomes a low frequency large amplitude (5 to 20 Hz: 0.5 to 1 mm) vibration during traveling of the vehicle is greatly increased in the negative pressure introduction chamber 14 of the negative pressure actuator 13. Based on the spring force of the return spring 15 by introducing the atmospheric pressure, the rigid plate 16 is brought to the sealed position of the opening of the first restriction passage 9 as shown in FIG. And the valve member 12 is displaced to the advanced limit position with respect to the fixed frame member 11 to prevent the fluid from flowing between the two members.
However, when the engine shake vibration is input, the liquid in the main / sub liquid chambers 7 and 8 changes through the second restricting passage 10 to the diaphragm 4. Can smoothly flow from one to the other.
Even in this flow of the liquid passing through the restriction passage 10, the liquid column resonance of the liquid in the passage 10 at the resonance frequency selected in advance, the flow resistance received from the passage by the liquid in the passage 10, etc. Therefore, the vibration is attenuated and the increase of the dynamic spring constant is suppressed.

そしてさらに、車両の走行中にあって、第１の制限通路９の開口が、剛性プレート１６によって図２に示すように閉止された状態の下で、車両の加速に伴ってエンジンが沈み込み変位しつつ振動して、弾性部材３が、図３に例示するように、仕切部材６側へ所定量ｄを越えて圧縮変形された場合は、コア部材１に設けた、好ましくは弾性突部２２により、弁部材１２を、負圧アクチュエータ１３のリターンスプリング１５のばね力に抗し、固定枠部材１１に対してダイアフラム４側へ押圧して、周方向の複数個所でフローティング支持したその弁部材１２を、固定枠部材１１から開放変位させ、その弁部材１２と固定枠部材１１との間に、封入液体の流動を許容できる隙間をもたらすことにより、両液室７，８内の液体は、その隙間を経て、高圧側から低圧側へ円滑に流動することになるので、この加速時の、５０〜２００Ｈｚの高周波入力振動に対し、動的ばね定数の増加が有効に抑制されることになって、装置に高い防振機能を発揮させることができる。 Further, while the vehicle is running, the engine sinks and displaces as the vehicle accelerates while the opening of the first restriction passage 9 is closed by the rigid plate 16 as shown in FIG. However, when the elastic member 3 is vibrated while being compressed and deformed beyond the predetermined amount d toward the partition member 6 as illustrated in FIG. 3, the elastic protrusion 22 provided on the core member 1 is preferably provided. Thus, the valve member 12 is pressed against the fixed frame member 11 toward the diaphragm 4 against the spring force of the return spring 15 of the negative pressure actuator 13, and the valve member 12 is floatingly supported at a plurality of locations in the circumferential direction. Is released from the fixed frame member 11, and a gap is allowed between the valve member 12 and the fixed frame member 11 to allow the flow of the sealed liquid. Through the gap, Since the fluid flows smoothly from the pressure side to the low pressure side, an increase in the dynamic spring constant is effectively suppressed against high frequency input vibrations of 50 to 200 Hz during this acceleration, resulting in high protection for the apparatus. The vibration function can be demonstrated.

１コア部材
２筒状部材
２ａ等径部分
３弾性部材
３ａ弾性被膜層
４ダイアフラム
５流体室
６仕切部材
７主液室
８副液室
９第１の制限通路
１０第２の制限通路
１１固定枠部材
１１ａ上あご部
１１ｂ下あご部
１２弁部材
１２ａ弾性材料
１３負圧アクチュエータ
１４負圧導入室
１５リターンスプリング
１６剛性プレート
１６ａ弾性シール部材
１７フック状部材
１８頂壁付き剛性筒状部材
１９筒状剛性ハウジング
１９ａ筒状部
２０可撓膜体
２１剛性カード
２２突部
ｄ所定量 DESCRIPTION OF SYMBOLS 1 Core member 2 Cylindrical member 2a Equal-diameter part 3 Elastic member 3a Elastic coating layer 4 Diaphragm 5 Fluid chamber 6 Partition member 7 Main liquid chamber 8 Sub liquid chamber 9 First restricting passage 10 Second restricting passage 11 Fixed frame member 11a Upper jaw part 11b Lower jaw part 12 Valve member 12a Elastic material 13 Negative pressure actuator 14 Negative pressure introduction chamber 15 Return spring 16 Rigid plate 16a Elastic seal member 17 Hook-like member 18 Rigid cylindrical member 19 with top wall Cylindrical rigid housing 19a Tubular part 20 Flexible film body 21 Rigid card 22 Protruding part d Predetermined amount

Claims

振動発生側部材もしくは振動伝達側部材のいずれか一方側に連結されるコア部材および、他方側に連結される筒状部材のそれぞれを設け、コア部材の外周面と、筒状部材の一方の端部分の内周面とを、筒状部材の他端側に向けて内径が漸増する、外面輪郭形状が截頭錐台状の弾性部材により、全周にわたって液密に連結するとともに、筒状部材の他端側をダイアフラムによって液密に封止し、少なくとも、ダイアフラムと、筒状部材と、弾性部材とで囲繞されるスペースを、液体を封入した流体室とし、この流体室を、筒状部材の内周面に取付けた仕切部材によって、弾性部材側に位置する主液室と、ダイアフラム側に位置する副液室とに区分し、
それらの両液室を、アイドリング振動の減衰をもたらす、第１の制限通路および、エンジンシェイク振動の減衰をもたらす第２の制限通路のそれぞれで、相互に独立させて連通させ、
前記仕切部材を、筒状部材に取付けられて、第２の制限通路の区画に寄与する固定枠部材と、この固定枠部材内に、固定枠部材から間隔をおいて、周方向の複数個所でフローティング支持されて、第１の制限通路の区画に寄与し、固定枠部材の中心軸線方向に、所定の範囲にわたって変位可能な弁部材とで構成し、
筒状部材の他端側に、弁部材の第１の制限通路を閉止するとともに、その弁部材を、固定枠部材に対して進出限位置に押圧する一方、弁部材の第１の制限通路を開放するとともに、その弁部材を、固定枠部材に対して後退限位置に押圧する負圧アクチュエータを配設し、
前記コア部材に、仕切部材側へ突出して、前記弾性部材の所定量を越える圧縮方向の変形に基いて、弁部材を、固定枠部材に対して開放変位させる突部を設けてなる防振装置。 A core member connected to either one of the vibration generation side member or the vibration transmission side member and a cylindrical member connected to the other side are provided, and the outer peripheral surface of the core member and one end of the cylindrical member are provided. The inner circumferential surface of the portion is liquid-tightly connected over the entire circumference by an elastic member whose outer surface contour shape is a truncated frustum-like shape whose inner diameter gradually increases toward the other end side of the cylindrical member, and the cylindrical member The other end of the liquid is sealed in a fluid-tight manner by a diaphragm, and at least a space surrounded by the diaphragm, the cylindrical member, and the elastic member is a fluid chamber in which liquid is sealed, and the fluid chamber is used as the cylindrical member. By the partition member attached to the inner peripheral surface of the main liquid chamber is divided into a main liquid chamber located on the elastic member side and a sub liquid chamber located on the diaphragm side,
These two fluid chambers communicate with each other independently of each other in each of a first restriction passage that causes damping of idling vibration and a second restriction passage that causes damping of engine shake vibration;
The partition member is attached to the cylindrical member and contributes to the section of the second restricted passage, and the fixed frame member is spaced apart from the fixed frame member at a plurality of locations in the circumferential direction. Floating supported, contributing to the section of the first restriction passage, and configured with a valve member that can be displaced over a predetermined range in the central axis direction of the fixed frame member,
The first restriction passage of the valve member is closed on the other end side of the tubular member, and the valve member is pressed to the advance limit position with respect to the fixed frame member, while the first restriction passage of the valve member is A negative pressure actuator that opens and presses the valve member to the retreat limit position with respect to the fixed frame member is disposed,
An anti-vibration device provided on the core member with a protrusion that protrudes toward the partition member and opens and displaces the valve member relative to the fixed frame member based on deformation in the compression direction exceeding a predetermined amount of the elastic member. .

仕切部材の固定枠部材に、弁部材の、所定量を越える進退変位を拘束するそれぞれの当接部分を設けてなる請求項１に記載の防振装置。 The vibration isolator according to claim 1, wherein the fixed frame member of the partition member is provided with respective contact portions for restraining the forward and backward displacement of the valve member exceeding a predetermined amount.

仕切部材の弁部材に、その弁部材の、固定枠部材に対する、所定量を越える進退変位を拘束するそれぞれの当接部分を設けてなる請求項１に記載の防振装置。 2. The vibration isolator according to claim 1, wherein the valve member of the partition member is provided with respective contact portions for restraining the valve member from advancing and retreating over a predetermined amount with respect to the fixed frame member.

負圧アクチュエータを、負圧導入室と、この負圧導入室内に配置したリターンスプリングと、ダイアフラムに貫通させて配置されて、弁部材の第１の制限通路の周りに接触する剛性プレートと、弁部材に設けられ、剛性プレートの、弁部材から離隔する方向の後退変位に当って、その剛性プレートに掛合するフック状部材とで構成してなる請求項１〜３のいずれかに記載の防振装置。 A negative pressure actuator, a negative pressure introduction chamber, a return spring disposed in the negative pressure introduction chamber, a rigid plate disposed through the diaphragm and contacting around the first restriction passage of the valve member; The vibration isolating device according to any one of claims 1 to 3, wherein the anti-vibration device comprises a hook-shaped member that is provided on the member and engages with the rigid plate when the rigid plate moves backward in a direction away from the valve member. apparatus.

負圧アクチュエータの負圧導入室を、中央部分に位置してリターンスプリングの着座を許容する、頂壁付きの剛性筒状部材と、この剛性筒状部材の周りに内周縁を気密に固着されて、外周縁を、底壁付きハウジングの筒状部に気密に連結した可撓膜体とで区画してなる請求項４に記載の防振装置。 The negative pressure introduction chamber of the negative pressure actuator is positioned at the center portion to allow the return spring to be seated, and a rigid cylindrical member with a top wall, and the inner peripheral edge thereof is hermetically fixed around the rigid cylindrical member. The vibration isolator according to claim 4, wherein the outer peripheral edge is partitioned by a flexible film body airtightly connected to the cylindrical portion of the housing with the bottom wall.

負圧アクチュエータの、剛性プレートを設けたロッドを、ダイアフラムに貫通させるとともに、そのダイアフラムに固着させてなる請求項４もしくは５に記載の防振装置。 6. The vibration isolator according to claim 4 or 5, wherein a rod provided with a rigid plate of a negative pressure actuator is passed through the diaphragm and fixed to the diaphragm.

前記ロッドを、頂壁付きの剛性筒状部材から突出させてなる請求項６に記載の防振装置。 The vibration isolator according to claim 6, wherein the rod is protruded from a rigid cylindrical member with a top wall.