JP4823976B2

JP4823976B2 - Liquid filled anti-vibration support device

Info

Publication number: JP4823976B2
Application number: JP2007166216A
Authority: JP
Inventors: 尚規宮本; 純生内田
Original assignee: Kurashiki Kako Co Ltd
Current assignee: Kurashiki Kako Co Ltd
Priority date: 2007-06-25
Filing date: 2007-06-25
Publication date: 2011-11-24
Anticipated expiration: 2027-06-25
Also published as: JP2009002478A

Description

本発明は液体封入式の防振支持装置に関し、特にストッパの構造の技術分野に属する。 The present invention relates to a liquid-filled vibration-proof support device, and particularly belongs to the technical field of a stopper structure.

従来より、この種の防振支持装置としては自動車用のエンジンマウントが良く知られている。その基本的な構造は、被支持体であるエンジン側の連結金具と車体側の支持金具との間にゴム弾性体を介設し、このゴム弾性体の変形に伴い容積が変化するよう両金具間に液室を形成するとともに、この液室を受圧室及び平衡室に仕切り、さらに、それら受圧室及び平衡室を連通するオリフィス通路を設けたものである。このオリフィス通路を介して液体が流動することで、所定周波数域のエンジン振動を効果的に吸収し、減衰させることができる。 2. Description of the Related Art Conventionally, an automobile engine mount is well known as this type of anti-vibration support device. The basic structure is that a rubber elastic body is interposed between the engine-side connecting bracket and the vehicle body-side supporting bracket, which are supported, and both the brackets change its volume as the rubber elastic body deforms. A liquid chamber is formed therebetween, the liquid chamber is divided into a pressure receiving chamber and an equilibrium chamber, and an orifice passage is provided to communicate the pressure receiving chamber and the equilibrium chamber. When the liquid flows through the orifice passage, engine vibration in a predetermined frequency region can be effectively absorbed and attenuated.

また、一般的にエンジンマウントには、ゴム弾性体の破損を防止するために、連結金具と支持金具との相対変位を規制するストッパが設けられている。これは通常、連結金具又は支持金具の一方に或る程度以上の大きさのゴム層を形成して、両金具の相対変位に伴い他方の金具に当接させるようにしており（例えば特許文献１、２を参照）、そうしてストッパが作動すると、これによりエンジン側と車体側とが繋がることになるから、車体側への振動伝達が懸念される。 In general, the engine mount is provided with a stopper for restricting the relative displacement between the connection fitting and the support fitting in order to prevent the rubber elastic body from being damaged. In general, a rubber layer having a certain size or more is formed on one of the connecting metal fittings or the support metal fittings, and is brought into contact with the other metal fitting with relative displacement of both metal fittings (for example, Patent Document 1). 2), when the stopper is operated, the engine side and the vehicle body side are connected to each other, and there is a concern about vibration transmission to the vehicle body side.

この点につき例えば特許文献３、４に記載のマウントでは、ストッパゴムの先端に凸条部を設けたり、或いはゴム層の内部にすぐり（空洞部）を設けたりして、部分的に剛性を低下させるようにしている。こうすれば、ストッパが作動してもマウントの動ばねが急上昇することはなく、車体側へ伝わる振動が急に大きくなることはない。
特開平９−２１０１１８号公報米国特許第６３４１７６６号明細書特開昭６１−９２３２９号公報特公昭６０−０２５４１号公報 In this regard, for example, in the mounts described in Patent Documents 3 and 4, the rigidity is partially reduced by providing a protrusion at the tip of the stopper rubber or by providing an edge (cavity) inside the rubber layer. I try to let them. In this way, even if the stopper is operated, the dynamic spring of the mount does not rise rapidly, and the vibration transmitted to the vehicle body does not suddenly increase.
JP-A-9-210118 US Pat. No. 6,341,766 JP-A 61-92329 Japanese Patent Publication No. 60-02541

しかしながら、前記後者の従来例（特許文献３、４）のようにストッパゴムの剛性を部分的に低下させたとしても、このことはストッパ作動時のマウント動ばねの上昇を遅らせるだけであり、ストッパを介しての振動伝達を十分に抑制できるものではない。 However, even if the rigidity of the stopper rubber is partially reduced as in the latter conventional example (Patent Documents 3 and 4), this only delays the rise of the mount dynamic spring during the stopper operation. It is not possible to sufficiently suppress the transmission of vibrations through the.

すなわち、例えば自動車の全開加速時等には駆動反力によってパワープラントが後傾し、それを支持するマウントにおいてストッパが作動したままになることがあるが、このときにエンジンは比較的大きな振動を発生しており、これがストッパを介して車室内に伝達されると、不快なこもり音等の不具合が生じるのである。 That is, for example, when the vehicle is fully opened, the power plant may tilt backward due to the driving reaction force, and the stopper may remain operating in the mount that supports the power plant. If this occurs and is transmitted to the passenger compartment through the stopper, problems such as an unpleasant booming noise occur.

本発明は、斯かる点に鑑みてなされたものであり、その目的とするところは、自動車等に広く用いられている液体封入式のマウント等（防振支持装置）におけるストッパの構造に工夫を凝らし、その作動に伴う動ばねの上昇を抑えて、こもり音のような不具合を軽減することにある。 The present invention has been made in view of such a point, and its object is to devise a stopper structure in a liquid-filled mount or the like (anti-vibration support device) widely used in automobiles and the like. It is to reduce the troubles such as the booming noise by suppressing the rise of the dynamic spring accompanying the operation.

前記の目的を達成するために本発明では、液体の流動によって振動を吸収し、減衰させる防振機構（以下、液封防振機構という）をストッパにも設けて、これがチューニングされている周波数域における動ばねを低下させるようにした。 In order to achieve the above object, in the present invention, an anti-vibration mechanism (hereinafter referred to as a liquid seal anti-vibration mechanism) that absorbs and attenuates vibration by the flow of liquid is also provided in the stopper, and the frequency range in which this is tuned. The dynamic spring at is lowered.

すなわち、請求項１の発明は、被支持体側に連結される連結金具と、これをゴム弾性体を介して支持する支持金具と、そのゴム弾性体の変形に伴い容積が変化するように前記両金具間に形成された第１液室と、この第１液室の内部を受圧室及び平衡室に仕切る仕切り部と、それら受圧室及び平衡室を連通する第１オリフィス通路と、を備えた液体封入式の防振支持装置を対象とする。 That is, the invention of claim 1 is characterized in that the coupling metal connected to the supported body side, the support metal supporting this via a rubber elastic body, and the both of the volume so that the volume changes with deformation of the rubber elastic body. A liquid comprising a first liquid chamber formed between the metal fittings, a partition for partitioning the inside of the first liquid chamber into a pressure receiving chamber and an equilibrium chamber, and a first orifice passage communicating the pressure receiving chamber and the equilibrium chamber. The target is an enclosed vibration-proof support device.

そして、前記連結金具及び支持金具の少なくとも一方に、それらの相対変位に伴い他方の金具に当接するよう、ゴム部を有するストッパが設けられている場合に、このストッパには、前記他方の金具との当接によるゴム部の変形に伴い容積が変化するように、少なくとも２つの第２液室と、それらを連通する第２オリフィス通路とを設け、連結金具及び支持金具の一方に、前記静荷重の入力方向の軸線を周回する周回部を設け、また、他方の金具には、前記周回部の外周を離間して囲む囲繞壁部を設けた上で、ストッパとしては、前記一方の金具の周回部の外周に全周に亘って環状ゴム部を設けるとともに、その環状ゴム部の外周をそれよりも剛性の高い環状壁部で覆い、この環状壁部の外周と前記他方の金具の囲繞壁部の内周との間に隙間を形成し、ストッパの環状ゴム部と環状壁部との間に、一方の金具を間に挟んで所定方向（例えばパワープラントのローリングによってマウントの連結金具と支持金具とが相対変位する方向）に対峙するように一対の第２液室を設け、この第２液室同士を連通する第２オリフィス通路を、前記一方の金具に貫通形成する構成とする。 When a stopper having a rubber part is provided on at least one of the coupling metal and the support metal so as to come into contact with the other metal according to their relative displacement, the stopper and the other metal At least two second liquid chambers and a second orifice passage communicating them are provided so that the volume changes with the deformation of the rubber portion due to the contact of the rubber part, and the static load is provided on one of the connection fitting and the support fitting. And the other metal fitting is provided with a surrounding wall portion that surrounds and surrounds the outer circumference of the circumferential portion so that the stopper can be used as a stopper. An annular rubber part is provided over the entire circumference of the part, and the outer circumference of the annular rubber part is covered with a more rigid annular wall part, and the outer circumference of the annular wall part and the surrounding wall part of the other metal fitting Gap between the inner circumference Formed and opposed to a predetermined direction (for example, a direction in which the mount coupling bracket and the support bracket are relatively displaced by the rolling of the power plant) between the annular rubber portion and the annular wall portion of the stopper, with one bracket interposed therebetween. Thus, a pair of second liquid chambers are provided, and a second orifice passage that communicates the second liquid chambers is formed through the one metal fitting .

前記構成の防振支持装置は、それを例えば自動車のエンジンマウントに適用した場合、一例として加速時や減速時の駆動反力によってパワープラントがロールすると、これにより相対変位する車体側の支持金具とエンジン側の連結金具との間で、少なくとも一方の金具に設けられたストッパが他方の金具に当接し、変位を規制するようになる。 For example, when the vibration isolating support device having the above-described configuration is applied to an engine mount of an automobile, when the power plant rolls by a driving reaction force during acceleration or deceleration, for example, A stopper provided on at least one of the metal fittings contacts with the metal fitting on the engine side, so that the displacement is regulated.

そうしてストッパが作動すると、これを介して連結金具及び支持金具が繋がることになり、エンジン振動の車体側への伝達が大きくなる虞れがあるが、ストッパのゴム部には少なくとも２つの液室（第２液室）とそれらを連通するオリフィス通路（第２オリフィス通路）とからなる液封防振機構が備えられ、これがチューニングされている周波数域においては動ばねが大幅に低下するので、振動を効果的に吸収し、減衰させることができる。 When the stopper is operated, the connecting bracket and the support bracket are connected via this, and there is a possibility that transmission of engine vibration to the vehicle body side may increase. However, at least two liquids are present in the rubber portion of the stopper. Since a liquid seal vibration isolating mechanism comprising a chamber (second liquid chamber) and an orifice passage (second orifice passage) communicating them is provided, and the dynamic spring is greatly reduced in the frequency range where this is tuned, Vibration can be effectively absorbed and damped.

よって、自動車のエンジンマウントの場合は、車室内にこもり音を生じるような特定の周波数域に合わせてオリフィス通路の寸法等をチューニングすれば、この周波数域の振動伝達を効果的に抑制し、こもり音を十分に軽減することができる。同様のチューニングを行うことで、自動車用に限らず、種々の防振支持装置においてストッパの効果を確保しながら、その作動時の振動伝達による不具合を軽減できる。 Therefore, in the case of an automobile engine mount, tuning the size of the orifice passage in accordance with a specific frequency range that generates a loud noise in the passenger compartment effectively suppresses vibration transmission in this frequency range and Sound can be reduced sufficiently. By performing the same tuning, it is possible to reduce problems caused by vibration transmission at the time of operation while securing the effect of the stopper in various anti-vibration support devices as well as for automobiles.

より具体的な構造として、例えばエンジンマウントに適用する場合、防振支持装置には被支持体であるエンジンの静的な荷重が概ね上下方向に入力することになり、上述のようなパワープラントのローリングによる連結金具及び支持金具の相対変位は、概ね自動車の前後若しくは左右方向、即ち、前記静荷重の入力方向に交差する方向になる。 As a more specific structure, for example, when applied to an engine mount, the static load of the engine, which is a supported body, is generally input to the vibration isolating support device in the vertical direction. The relative displacement of the connecting bracket and the support bracket due to rolling is generally in the direction crossing the front-rear or left-right direction of the automobile, that is, the static load input direction .

この構成では、上述したようにパワープラントがローリングして、マウントの連結金具と支持金具とが自動車の前後若しくは左右方向に相対変位すると、これにより相対的に近接する側においてストッパの環状壁部が囲繞壁部に当接して押圧されるようになり、これを介して環状ゴム部には圧縮及び剪断の両方の力が作用する。このことで、ゴムの圧縮の反力のみによって変位を規制する場合に比べると、同じ効果を得るためのゴム部の剛性は低めに設定することができ、このゴム部を介しての振動伝達を抑える上で有利になる。 In this configuration, the rolling power plant as described above, when the connecting fitting mounting and support bracket is displaced relative to the longitudinal or lateral direction of the automobile, thereby annular wall portion of the stopper on the side relatively close Comes into contact with and is pressed against the surrounding wall portion, via which both the compression and shear forces act on the annular rubber portion. This makes it possible to set the rigidity of the rubber part to obtain the same effect as compared with the case where the displacement is restricted only by the reaction force of the rubber compression, and vibration transmission through this rubber part is reduced. It becomes advantageous in suppressing .

こうすれば、環状ゴム部の成形時に、その外周面に開口する所要の大きさの凹部を形成し、これを環状壁部で覆うことによって、容易に第２液室を設けることができる。そして、一対の第２液室を連結金具及び支持金具の相対変位方向に対峙させて配置すれば、振動による両金具の相対変位によって一方の液室の容積が縮小するときに、他方の容積が拡大することになり、それらを連通する第２オリフィス通路において液体を効率良く流動させることができる。 That way this, during molding of the annular rubber portion, a recess of predetermined size which is open on the outer peripheral surface, which by covering an annular wall portion can be provided easily second liquid chamber. If the pair of second liquid chambers are arranged opposite to each other in the relative displacement direction of the connecting metal fitting and the support metal fitting, when the volume of one liquid chamber is reduced due to the relative displacement of both metal fittings due to vibration, the other volume is reduced. As a result, the liquid can be efficiently flowed in the second orifice passage communicating with them.

より好ましいのは、前記一方の金具に、一端が外部に開放し、他端が第２オリフィス通路に連通する第１連通路と、この第１連通路との連通部位に対向して一端が前記第２オリフィス通路に連通し、他端が第１液室に連通する第２連通路と、を形成することである（請求項２）。こうすれば、防振支持装置の製造時に第１及び第２の連通路を介して第１液室に液体を充填することができるとともに、第１連通路と第２オリフィス通路とを介して第２液室にも液体を充填することができ、工程の簡略化が可能になる。 More preferably, the one metal fitting has one end opened to the outside and the other end communicating with the second orifice passage, and one end facing the communication portion of the first communication passage. communicates with the second orifice passage and the other end is to form a second communication passage communicating with the first liquid chamber, a (claim 2). In this way, the liquid can be filled into the first liquid chamber via the first and second communication passages during the manufacture of the vibration isolating support device, and the first liquid passage and the second orifice passage can be used to fill the first liquid chamber. The two liquid chambers can be filled with liquid, and the process can be simplified.

また、請求項３の発明は、被支持体側に連結される連結金具と、これをゴム弾性体を介して支持する支持金具と、そのゴム弾性体の変形に伴い容積が変化するように前記両金具間に形成された第１液室と、この第１液室の内部を受圧室及び平衡室に仕切る仕切り部と、それら受圧室及び平衡室を連通する第１オリフィス通路と、を備えた液体封入式の防振支持装置を対象とする。 According to a third aspect of the present invention, there is provided a connecting bracket connected to the supported body side, a supporting bracket for supporting the connecting bracket via a rubber elastic body, and the both of the volumes so that the volume changes with deformation of the rubber elastic body. A liquid comprising a first liquid chamber formed between the metal fittings, a partition for partitioning the inside of the first liquid chamber into a pressure receiving chamber and an equilibrium chamber, and a first orifice passage communicating the pressure receiving chamber and the equilibrium chamber. The target is an enclosed vibration-proof support device.

そして、前記連結金具及び支持金具の少なくとも一方には、それらの相対変位に伴い他方の金具に当接するように、ゴム部を有するストッパを設け、前記ストッパには、前記他方の金具との当接によるゴム部の変形に伴い容積が変化するように、少なくとも２つの第２液室と、それらを連通する第２オリフィス通路とを、設け、前記連結金具及び支持金具の一方には、被支持体の静荷重が入力する方向の軸線を周回する周回部を、また、他方の金具には前記周回部の外周を離間して囲む囲繞壁部を、それぞれ設け、前記ストッパは、前記一方の金具の周回部の外周に全周に亘って設けられた環状ゴム部と、その外周を覆う相対的に高剛性の環状壁部と、を有し、この環状壁部の外周と前記他方の金具の囲繞壁部の内周との間に隙間を形成し、ストッパの環状ゴム部と環状壁部との間に形成した一対の第２液室同士を、同じく環状ゴム部と環状壁部との間で周方向に延びる第２オリフィス通路によって、連通させる構成とする。こうすれば、第２液室と同様に第２オリフィス通路も容易に設けることができるとともに、その寸法についての制約が少なくなって、チューニングの自由度が向上する。 Then, at least one of the coupling metal and the support metal is provided with a stopper having a rubber part so as to abut against the other metal with relative displacement thereof, and the stopper is brought into contact with the other metal At least two second liquid chambers and a second orifice passage communicating them are provided so that the volume changes in accordance with the deformation of the rubber part due to, and one of the connection fitting and the support fitting has a supported body. A rotating portion that circulates an axis in the direction in which the static load is input, and the other bracket is provided with an surrounding wall portion that surrounds the outer periphery of the rotating portion, and the stopper is provided on the one bracket. An annular rubber portion provided on the entire circumference of the circumference portion, and a relatively high-rigidity annular wall portion covering the outer circumference, and the outer circumference of the annular wall portion and the surrounding of the other metal fitting forming a gap between the inner peripheral wall portion, A pair of second liquid chamber to each other formed between the annular rubber portion and the annular wall portion of the stopper, also by the second orifice passage extending in the circumferential direction between the annular rubber portion and the annular wall portion, and configured to communicate To do . In this way, the second orifice passage can be easily provided in the same manner as the second liquid chamber, and restrictions on the dimensions are reduced, and the degree of tuning is improved.

さらに、請求項４の発明は、被支持体側に連結される連結金具と、これをゴム弾性体を介して支持する支持金具と、そのゴム弾性体の変形に伴い容積が変化するように前記両金具間に形成された第１液室と、この第１液室の内部を受圧室及び平衡室に仕切る仕切り部と、それら受圧室及び平衡室を連通する第１オリフィス通路と、を備えた液体封入式の防振支持装置を対象とする。 Furthermore, the invention of claim 4 is characterized in that the connecting metal connected to the supported body side, the support metal supporting the rubber metal via a rubber elastic body, and the both of the volumes so that the volume changes with deformation of the rubber elastic body. A liquid comprising a first liquid chamber formed between the metal fittings, a partition for partitioning the inside of the first liquid chamber into a pressure receiving chamber and an equilibrium chamber, and a first orifice passage communicating the pressure receiving chamber and the equilibrium chamber. The target is an enclosed vibration-proof support device.

そして、前記連結金具及び支持金具の少なくとも一方には、それらの相対変位に伴い他方の金具に当接するように、ゴム部を有するストッパを設け、前記ストッパには、前記他方の金具との当接によるゴム部の変形に伴い容積が変化するように、少なくとも２つの第２液室と、それらを連通する第２オリフィス通路とを、設ける。Then, at least one of the coupling metal and the support metal is provided with a stopper having a rubber part so as to abut against the other metal with relative displacement thereof, and the stopper is brought into contact with the other metal At least two second liquid chambers and a second orifice passage communicating them are provided so that the volume changes with the deformation of the rubber part.

そうしてストッパを内周側の金具（一方の金具）に設けるのではなく、外周側の金具（他方の金具）に設ける。すなわち、前記他方の金具の囲繞壁部の内周に全周に亘って環状ゴム部を設け、その内周と前記一方の金具の周回部の外周との間に隙間を形成する。こうして外周側に設けることで、ストッパの内部に液室や通路を設けるスペースを確保し易い。 Then instead of providing the stopper fitting of the inner circumferential side (one of the brackets), Ru provided on the outer circumferential side of the bracket (the other bracket). That is, an annular rubber portion is provided over the entire inner circumference of the surrounding wall portion of the other metal fitting, and a gap is formed between the inner circumference and the outer circumference of the circumferential portion of the one metal fitting . By providing it on the outer peripheral side in this way, it is easy to secure a space for providing a liquid chamber and a passage inside the stopper.

そうしてスペースを確保できれば、液封防振機構を２組設けて、それぞれに異なるチューニングを施すことも可能になる。すなわち、前記のように外周側に設けたストッパの環状ゴム部には、内周側の一方の金具を間に挟んで所定方向（上述の如く連結金具と支持金具との相対変位方向が好ましい）に対峙するように２つの第２液室を形成するとともに、その所定方向と交差する方向に対峙するよう、さらに２つの第２液室を形成して、これら４つの第２液室のうち、互いに周方向に隣り合う２つずつを第２オリフィス通路によって連通する。 If space can be secured in this way, it is possible to provide two sets of liquid seal vibration isolating mechanisms and perform different tunings on each. That is, as described above, the annular rubber portion of the stopper provided on the outer peripheral side is in a predetermined direction with one inner peripheral metal fitting interposed therebetween (the relative displacement direction between the connecting metal fitting and the support metal fitting is preferable as described above). Two second liquid chambers are formed so as to face each other, and further, two second liquid chambers are formed so as to face each other in a direction crossing the predetermined direction, and among these four second liquid chambers, the two by two adjacent to each other circumferentially communicates with the second orifice passage.

そうして液室及びオリフィス通路からなる液封防振機構を２組設ければ、例えば自動車の加速時及び減速時のように、連結金具及び支持金具の相対変位の向きが逆になる場合に、そのうちの一方（例えば加速時）に合わせて１組の液封防振機構をチューニングするとともに、他方（例えば減速時）に合わせて別の液封防振機構をチューニングする、というように、求められる特性に応じてきめ細かなチューニングを施すことが可能になる。 Thus, if two sets of liquid seal vibration isolating mechanisms comprising a liquid chamber and an orifice passage are provided, for example, when the relative displacement directions of the connection fitting and the support fitting are reversed, such as during acceleration and deceleration of an automobile. , Tune one set of anti-vibration anti-vibration mechanisms for one of them (eg during acceleration) and tune another anti-vibration anti-vibration mechanism for the other (eg during deceleration). It becomes possible to perform fine tuning according to the characteristics to be obtained.

但し、そうした場合、連結金具及び支持金具の相対変位に伴い、その相対変位方向に対峙する２つの第２液室のいずれかの容積が拡大又は縮小するときに、これに連通されている第２液室の容積を縮小又は拡大させる必要がある。そこで、この第２液室のそれぞれに臨むように、前記環状ゴム部の内周面には他の部位よりも薄肉の膜状部を形成し、この膜状部の変形によって液室の容積変化を吸収するようにする。 However, in such a case, when the volume of one of the two second liquid chambers opposed to the relative displacement direction expands or contracts with the relative displacement of the connecting metal fitting and the support metal fitting, the second is communicated therewith. It is necessary to reduce or enlarge the volume of the liquid chamber. Therefore, a thin film-like part is formed on the inner peripheral surface of the annular rubber part so as to face each of the second liquid chambers, and the volume change of the liquid chamber is caused by the deformation of the film-like part. the to absorb.

以上、説明したように、本発明に係る液体封入式の防振支持装置によると、連結金具と支持金具との相対変位を規制するストッパに、液体の流動抵抗によって振動を減衰させる液封防振機構を設けたので、これによりチューニングした周波数域ではストッパの作動に伴う動ばねの上昇を抑えて、振動伝達に起因する不具合を十分に軽減することができる。一例として自動車のエンジンマウントの場合は、車室内にこもり音を生じるような周波数域における振動の伝達を効果的に抑制でき、全開加速時であっても、こもり音を十分に軽減できるようになる。 As described above, according to the liquid-filled vibration-proof support device of the present invention, the liquid-sealed vibration-proof device that attenuates the vibration by the flow resistance of the liquid is provided on the stopper that restricts the relative displacement between the connecting metal fitting and the support metal fitting. Since the mechanism is provided, in the tuned frequency range, the rise of the dynamic spring accompanying the operation of the stopper can be suppressed, and the problems caused by vibration transmission can be sufficiently reduced. For example, in the case of an automobile engine mount, it is possible to effectively suppress the transmission of vibrations in a frequency range that generates a booming noise in the passenger compartment, and the booming noise can be sufficiently reduced even during full-open acceleration. .

以下、本発明の実施形態を図面に基づいて詳細に説明する。尚、以下の好ましい実施形態の説明は、本質的に例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものではない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

（実施形態１）
図１〜４は、本発明に係る液体封入式の防振支持装置を自動車用エンジンマウントＡに適用した実施形態を示し、このエンジンマウントＡは、図示しない自動車のエンジン及び変速機（以下、両者をまとめてパワープラントという）と車体との間に介在されて、そのパワープラントの静荷重を支えるとともに、当該パワープラントからの振動を吸収し或いは減衰させて、車体への伝達を抑制するためのものである。 (Embodiment 1)
1 to 4 show an embodiment in which a liquid-filled vibration-proof support device according to the present invention is applied to an engine mount A for an automobile. The engine mount A includes an automobile engine and a transmission (not shown) Are collectively called a power plant) to support the static load of the power plant and absorb or attenuate vibrations from the power plant to suppress transmission to the vehicle body. Is.

この実施形態のエンジンマウントＡは、図示しないブラケット等を介して被支持体であるパワープラントに取り付けられる概略円柱状の連結金具１と、これをゴム弾性体２を介して下方から支持する円筒状の支持金具３とを備え、この支持金具３の下側外周における自動車の前側及び後側（以下、単に前側、後側という）にそれぞれ溶接された一対の脚部３０，３０によって、車体フレームに固定されるようになっている。支持金具３は、後述するストッパ金具８とともにマウントＡのケースとしても機能する。 The engine mount A of this embodiment has a substantially columnar connection fitting 1 attached to a power plant as a supported body via a bracket (not shown) and the like, and a cylindrical shape that supports this from below via a rubber elastic body 2. And a pair of legs 30, 30 welded to the front and rear sides (hereinafter simply referred to as the front and rear sides) of the automobile on the lower outer periphery of the support bracket 3, respectively. It is supposed to be fixed. The support fitting 3 also functions as a case of the mount A together with a stopper fitting 8 described later.

図３に示すように、連結金具１は、軸線Ｚ方向の中間部につば部１０を有し、その下側には下方に向かってすぼんだテーパ部１１が、また上側には軸部１２が、それぞれ形成されている。軸部１２の上端面にはパワープラント側のブラケットが取り付けられて、図示しないボルトがボルト穴１２ａに螺入される。図の例では軸線Ｚは、パワープラントの静荷重が入力する方向の軸線であり、つば部１０は、その軸線Ｚを中心として周回する円環状の周回部であって、その上面及び外周面には各々環状のストッパ部６，７が設けられている。 As shown in FIG. 3, the connecting metal fitting 1 has a flange portion 10 at an intermediate portion in the direction of the axis Z, a tapered portion 11 that dents downward on the lower side, and a shaft portion 12 on the upper side. , Each is formed. A bracket on the power plant side is attached to the upper end surface of the shaft portion 12, and a bolt (not shown) is screwed into the bolt hole 12a. In the example of the figure, the axis Z is an axis in the direction in which the static load of the power plant is input, and the collar portion 10 is an annular circumferential portion that circulates around the axis Z, and the upper surface and the outer circumferential surface thereof. Are provided with annular stoppers 6 and 7, respectively.

上面のストッパ部６は、つば部１０に加硫接着されたゴム層からなり（以下、ストッパゴム６という）、後述するように、ストッパ金具８と協働して連結金具１及び支持金具３の上下方向の相対変位を規制する。また、外周のストッパ部７は、図３の他、図２等にも示すが、環状のゴム部７０とその外周を覆う金属製の筒部材７１（環状壁部）とからなり、これもストッパ金具８等と協働して、連結金具１及び支持金具３の前後方向の相対変位を規制するものである。ストッパ部７については、本発明の特徴部分として後に詳述する。 The stopper portion 6 on the upper surface is made of a rubber layer that is vulcanized and bonded to the collar portion 10 (hereinafter referred to as stopper rubber 6). As will be described later, the stopper portion 6 cooperates with the stopper fitting 8 to connect the connecting fitting 1 and the support fitting 3. Regulates the relative displacement in the vertical direction. The outer peripheral stopper portion 7 includes an annular rubber portion 70 and a metal cylinder member 71 (annular wall portion) covering the outer periphery, as shown in FIG. In cooperation with the metal fitting 8 or the like, the relative displacement in the front-rear direction of the connection metal fitting 1 and the support metal fitting 3 is regulated. The stopper portion 7 will be described in detail later as a characteristic portion of the present invention.

前記ゴム弾性体２は、その上部が連結金具１下側のテーパ部１１を覆って加硫接着され、そこから放射状に拡がりながら斜め下に向かって延びる厚肉の傘状部２０と、この傘状部２０の下端に連続して下方に延びる円筒部２１とからなり、この円筒部２１が支持金具３の内周に固定されている。すなわち、支持金具３は、図の例では内筒３１と外筒３２とからなる二重構造のものであり、その内筒３１がゴム弾性体２の円筒部２１に埋め込まれて一体化されるとともに、この円筒部２１の外周面が外筒３２の内周面に接着固定されている。 The rubber elastic body 2 is vulcanized and bonded at its upper portion to cover the tapered portion 11 on the lower side of the connecting metal 1, and a thick-walled umbrella-shaped portion 20 extending radially downward from the rubber-elastic body 2 and the umbrella. The cylindrical portion 21 extends downward continuously from the lower end of the shaped portion 20, and the cylindrical portion 21 is fixed to the inner periphery of the support fitting 3. That is, the support fitting 3 has a double structure composed of an inner cylinder 31 and an outer cylinder 32 in the illustrated example, and the inner cylinder 31 is embedded in the cylindrical portion 21 of the rubber elastic body 2 and integrated. At the same time, the outer peripheral surface of the cylindrical portion 21 is bonded and fixed to the inner peripheral surface of the outer cylinder 32.

また、ゴム弾性体２の円筒部２１は下側で拡径されて、環状の段部が形成されており、この段部を受け部として下方からオリフィス盤４が嵌挿されるとともに、このオリフィス盤４を下方から覆うようにしてゴム製のダイヤフラム５が配設されている。ダイヤフラム５の外周部には補強金具が埋め込まれていて、支持金具３の内筒３１の下端に内向きに形成されたフランジによって、下方からかしめられている。 Further, the cylindrical portion 21 of the rubber elastic body 2 is expanded in diameter on the lower side to form an annular step portion, and the orifice plate 4 is inserted from below as the step portion, and the orifice plate is provided. A rubber diaphragm 5 is disposed so as to cover 4 from below. A reinforcing metal fitting is embedded in the outer peripheral portion of the diaphragm 5 and is caulked from below by a flange formed inward at the lower end of the inner cylinder 31 of the support metal fitting 3.

そうしてダイヤフラム５により下端開口が閉塞されて、ゴム弾性体２の内部には所定の液体が封入される第１液室Ｆが形成される。この第１液室Ｆは、オリフィス盤４（仕切り部）によって上下に仕切られていて、その上側が受圧室ｆ１に、下側が平衡室ｆ２になる。パワープラントからの振動が入力してゴム弾性体２が変形すると、これにより主に受圧室ｆ１の容積が変化し、液圧が変動する。この液圧変動は第１オリフィス通路Ｐによって平衡室ｆ２に伝わり、その容積がダイヤフラム５の変形によって拡大又は縮小される。 Thus, the lower end opening is closed by the diaphragm 5, and a first liquid chamber F in which a predetermined liquid is sealed is formed inside the rubber elastic body 2. The first liquid chamber F is divided up and down by an orifice plate 4 (partition section), and the upper side thereof is a pressure receiving chamber f1 and the lower side is an equilibrium chamber f2. When vibration from the power plant is input and the rubber elastic body 2 is deformed, the volume of the pressure receiving chamber f1 mainly changes thereby, and the hydraulic pressure fluctuates. This fluid pressure fluctuation is transmitted to the equilibrium chamber f <b> 2 by the first orifice passage P, and its volume is expanded or reduced by the deformation of the diaphragm 5.

オリフィス盤４は、金属製の本体部材４０及び蓋部材４１が組合わされて、全体としては比較的厚肉の円盤状とされており、その内周側にはゴム製の可動板４２が収容されて、比較的周波数の高い小振幅のエンジン振動が入力したときに、これによる受圧室ｆ１の液圧変動を吸収するようになっている。一方、オリフィス盤４の外周には概ね全周に亘って開口する溝部が形成され、これがゴム弾性体２の円筒部２１によって囲まれることで、円環状の第１オリフィス通路Ｐが形成される。 The orifice plate 4 is formed by combining a metal main body member 40 and a lid member 41 to form a relatively thick disk as a whole, and a rubber movable plate 42 is accommodated on the inner peripheral side thereof. Thus, when a small amplitude engine vibration having a relatively high frequency is input, the fluid pressure fluctuation in the pressure receiving chamber f1 due to this is absorbed. On the other hand, a groove portion that is open over the entire circumference is formed on the outer periphery of the orifice board 4, and this is surrounded by the cylindrical portion 21 of the rubber elastic body 2, whereby an annular first orifice passage P is formed.

図３にのみ示すが、第１オリフィス通路Ｐの一端は、受圧室ｆ１に臨んで蓋部材４１の上面に開口している。第１オリフィス通路Ｐの他端は、図示しないが平衡室ｆ２に臨んで開口しており、この第１オリフィス通路Ｐを介して受圧室ｆ１及び平衡室ｆ２の間を相互に液体が流通することにより、所定の周波数域の振動が効果的に吸収、減衰されるようになる。この周波数域は概ね第１オリフィス通路Ｐの長さや断面積によって決まり、通常はアイドル振動等、比較的低周波で大振幅の振動に合わせて設定される。 Although shown only in FIG. 3, one end of the first orifice passage P is open to the upper surface of the lid member 41 facing the pressure receiving chamber f <b> 1. Although not shown, the other end of the first orifice passage P opens toward the equilibrium chamber f2, and liquid flows between the pressure receiving chamber f1 and the equilibrium chamber f2 through the first orifice passage P. Thus, vibrations in a predetermined frequency range are effectively absorbed and attenuated. This frequency range is generally determined by the length and cross-sectional area of the first orifice passage P, and is usually set in accordance with a relatively low frequency and large amplitude vibration such as idle vibration.

図２にも示すように、前記ゴム弾性体２の傘状部２０等、上側の部分を囲んで、支持金具３の上端部にはその外筒３２と略同径の円筒形状を有するストッパ金具８が取り付けられている。ストッパ金具８の下端には外側に張り出したフランジが形成され、このフランジがゴム弾性体２の円筒部２１の上端に載置されて、その内部の内筒３１の上端に外向きに形成されたフランジとともに、外筒３２の上端に形成されたコ字状部によってかしめられている。 As shown also in FIG. 2, a stopper fitting that surrounds an upper portion such as the umbrella-like portion 20 of the rubber elastic body 2 and has a cylindrical shape that is substantially the same diameter as the outer cylinder 32 at the upper end portion of the support fitting 3. 8 is attached. A flange projecting outward is formed at the lower end of the stopper fitting 8, and this flange is placed on the upper end of the cylindrical portion 21 of the rubber elastic body 2 and formed outward at the upper end of the inner cylinder 31 inside thereof. Together with the flange, it is caulked by a U-shaped part formed at the upper end of the outer cylinder 32.

前記ストッパ金具８は、連結金具１のつば部１０に設けられたストッパ部７の外周を離間して囲む囲繞壁部であり、その内周面のうち下端寄りを除いた略全面にゴム層８０が被覆形成されている。このゴム層８０の内周面は、前記ストッパ部７の筒部材７１の外周面との間に所定の隙間を空けて対向しており、それら両面が当接することによって、連結金具１とストッパ金具８、即ち支持金具３との前後方向の相対変位を規制するようになっている。 The stopper fitting 8 is an surrounding wall portion that surrounds the outer periphery of the stopper portion 7 provided on the collar portion 10 of the connecting fitting 1 so as to be spaced apart, and a rubber layer 80 is provided on substantially the entire surface of the inner peripheral surface except for the lower end. Is coated. The inner peripheral surface of the rubber layer 80 is opposed to the outer peripheral surface of the cylindrical member 71 of the stopper portion 7 with a predetermined gap therebetween, and these both surfaces come into contact with each other, whereby the connecting metal 1 and the stopper metal 8, that is, the relative displacement in the front-rear direction with respect to the support fitting 3 is restricted.

また、ストッパ金具８の上端には、連結金具１の軸部１２を取り囲むように内周側に向かって延びるフランジが形成されており、このフランジの下面が連結金具１のつば部１０上面のストッパゴム６に当接することによって、該連結金具１の上方への移動を規制するようになっている。さらに、フランジの上面には、図示しないエンジン側のブラケットに当接して上方への移動が規制されるように、換言すれば、前記連結金具１の下方への移動を規制するように、ゴム層８１が設けられている。 Further, a flange extending toward the inner peripheral side is formed at the upper end of the stopper fitting 8 so as to surround the shaft portion 12 of the connecting fitting 1, and the lower surface of this flange is a stopper on the upper surface of the collar portion 10 of the connecting fitting 1. By abutting against the rubber 6, the upward movement of the connecting metal fitting 1 is restricted. Further, the rubber layer is formed on the upper surface of the flange so as to abut against an unillustrated bracket on the engine side so that the upward movement is restricted, in other words, the downward movement of the connecting metal fitting 1 is restricted. 81 is provided.

尚、図３においては、エンジンマウントＡにパワープラントの静荷重が作用していない状態を示しており、つば部１０上面のストッパゴム６とストッパ金具８上端のフランジとの隙間は小さいが、エンジンマウントＡが自動車に取り付けられてパワープラントを支持し、その静荷重が加わる１Ｇ状態では、ゴム弾性体２が撓んで連結金具１が下方に変位するので、前記の隙間は大きくなる。 FIG. 3 shows a state where no static load of the power plant is applied to the engine mount A, and the gap between the stopper rubber 6 on the top surface of the flange portion 10 and the flange on the top end of the stopper fitting 8 is small. In the 1G state where the mount A is attached to the automobile to support the power plant and the static load is applied, the rubber elastic body 2 is bent and the connecting fitting 1 is displaced downward, so that the gap is increased.

（ストッパの構造）
本発明の特徴として、前記ストッパ部７には、液体の流動によって振動を吸収し、減衰させる機構が設けられており、これにより所要の周波数域における動ばねを低下させて、ストッパ金具８と当接した状態でも振動の伝達を効果的に抑制できるようになっている。すなわち、まず、ストッパ部７には図３の他、図２や図４にも示すが、連結金具１のつば部１０を間に挟んで前後方向に対峙するように、一対の第２液室７０ａ，７０ｂが形成されている。 (Stopper structure)
As a feature of the present invention, the stopper portion 7 is provided with a mechanism for absorbing and attenuating vibrations by the flow of liquid, thereby reducing the dynamic spring in a required frequency range so as to contact the stopper fitting 8. Vibration transmission can be effectively suppressed even in contact. That is, first, as shown in FIG. 2 and FIG. 4 in addition to FIG. 3, the stopper portion 7 includes a pair of second liquid chambers so as to confront each other in the front-rear direction with the collar portion 10 of the coupling metal 1 interposed therebetween. 70a and 70b are formed.

前記環状ゴム部７０はゴム弾性体２と同時に加硫成形されるもので、その際に外周面に開口するように所要の大きさの凹部（図２では、この凹部に符号７０ａ，７０ｂを付す）を形成しておき、例えば圧入接着によりそれに筒部材７１を組み付ければ、両者の間に第２液室７０ａ，７０ｂが形成される。図の例では第２液室７０ａ，７０ｂはいずれも周方向に長い扁平形状であり、左右両側の隔壁部７０ｃ，７０ｃによって前後に隔てられるとともに、前側の第２液室７０ａの右端付近と後側の第２液室７０ｂの左端付近とが、連結金具１のつば部１０を直径方向に貫通する通路１３によって連通されている。 The annular rubber portion 70 is vulcanized and molded at the same time as the rubber elastic body 2, and at that time, a recess having a required size is provided so as to open to the outer peripheral surface (in FIG. 2, reference numerals 70a and 70b are attached to the recess). ), And the cylindrical member 71 is assembled thereto by, for example, press-fitting adhesion, the second liquid chambers 70a and 70b are formed therebetween. In the example shown in the drawing, the second liquid chambers 70a and 70b are both flat and long in the circumferential direction, separated by front and rear by the partition portions 70c and 70c on the left and right sides, and near the right end and the rear of the front second liquid chamber 70a. The vicinity of the left end of the second liquid chamber 70b on the side is communicated with a passage 13 that penetrates the flange portion 10 of the connecting fitting 1 in the diameter direction.

そうして連結金具１０の前側及び後側にそれぞれ配設した第２液室７０ａ，７０ｂを通路１３により連通させて、相互に液体を流通させるようにすれば、その通路１３の長さや断面積等によってチューニングした所定周波数域において動ばねを大幅に低下させて、振動を効果的に吸収し、減衰させることができる。つまり、第２液室７０ａ，７０ｂ及び通路１３が液封防振機構であり、その通路１３は、第２液室７０ａ，７０ｂ同士を連通させる第２オリフィス通路１３である。 If the second liquid chambers 70a and 70b respectively disposed on the front side and the rear side of the connection fitting 10 are communicated with each other through the passage 13 so that the liquid is circulated, the length and the cross-sectional area of the passage 13 are increased. In the predetermined frequency range tuned by the above method, the dynamic spring can be greatly reduced to effectively absorb and attenuate the vibration. That is, the second liquid chambers 70a and 70b and the passage 13 are liquid seal vibration-proof mechanisms, and the passage 13 is the second orifice passage 13 that allows the second liquid chambers 70a and 70b to communicate with each other.

例えばパワープラントが前傾又は後傾し、連結金具１が前後方向に変位して、ストッパ部７の前端又は後端がストッパ金具８内周のゴム層８０に当接すると、このストッパ部７を介して振動が車体側に伝わる虞れがあるが、この状態で前記所定周波数域のエンジン振動が入力すると、ストッパ部７内の第２液室７０ａ，７０ｂの一方の容積が縮小又は拡大するときには、筒部材７１の前後方向の変位によって他方の第２液室７０ｂ，７０ａの容積は反対に拡大又は縮小することになり、それらを連通する第２オリフィス通路１３において液体を効率良く流動させることができる。 For example, when the power plant tilts forward or backward, the connecting bracket 1 is displaced in the front-rear direction, and the front end or the rear end of the stopper portion 7 contacts the rubber layer 80 on the inner periphery of the stopper bracket 8, the stopper portion 7 is moved. If the engine vibration in the predetermined frequency region is input in this state, the volume of one of the second liquid chambers 70a and 70b in the stopper portion 7 is reduced or expanded. The volume of the other second liquid chambers 70b and 70a is increased or decreased in the opposite direction due to the displacement of the cylindrical member 71 in the front-rear direction, so that the liquid can efficiently flow in the second orifice passage 13 that communicates them. it can.

尚、図２や図４に示すように、ストッパ部７の環状ゴム部７０には、液室７０ａ，７０ｂとなる各凹部の底面、即ち内周側面から半径方向外方に突出するように矩形状のブロック部７０ｄ，７０ｄが設けられており、これが筒部材７１の内周面に当接することによって、過大な変形によるゴム部７０の破損を防止することができる。 As shown in FIGS. 2 and 4, the annular rubber portion 70 of the stopper portion 7 has a rectangular shape so as to protrude outward in the radial direction from the bottom surfaces of the respective recesses that become the liquid chambers 70a and 70b, that is, the inner peripheral side surfaces. The block portions 70d and 70d having a shape are provided, and the rubber portions 70 can be prevented from being damaged due to excessive deformation by contacting the inner peripheral surface of the cylindrical member 71.

さらに、この実施形態では、図３に示すように連結金具１に、その軸部１２のボルト穴１２ａの下端から下方に延びて第２オリフィス通路１３に上側から連通する上側連通路１４と、この上側連通路１４との連通部位に対向して上端が前記第２オリフィス通路１３に下側から連通し、そこから軸線Ｚに沿って下方に延びて、下端が第１液室Ｆに連通する下側連通路１５と、が形成されている。 Further, in this embodiment, as shown in FIG. 3, the connection fitting 1 has an upper communication passage 14 that extends downward from the lower end of the bolt hole 12a of the shaft portion 12 and communicates with the second orifice passage 13 from above. Opposite the communicating portion with the upper communication passage 14, the upper end communicates with the second orifice passage 13 from below, extends downward along the axis Z, and the lower end communicates with the first liquid chamber F. A side communication passage 15 is formed.

前記上側連通路１４はボルト穴１２ａよりも小径とされ、上広がりのテーパ部を介してボルト穴１２ａに連通している。上側連通路１４とボルト穴１２ａとによって、一端が外部に開放し他端が第２オリフィス通路１３に連通する第１の連通路が形成され、これを介してストッパ部７の第２液室７０ａ，７０ｂに液体を供給することができる。また、下側連通路１５は、上側連通路１４よりもさらに小径で、第１液室Ｆに液体を供給する経路となる。 The upper communication passage 14 has a diameter smaller than that of the bolt hole 12a, and communicates with the bolt hole 12a through a taper portion that extends upward. The upper communication passage 14 and the bolt hole 12a form a first communication passage having one end opened to the outside and the other end communicated with the second orifice passage 13, through which the second liquid chamber 70a of the stopper portion 7 is formed. , 70b can be supplied with liquid. Further, the lower communication path 15 has a smaller diameter than the upper communication path 14 and serves as a path for supplying liquid to the first liquid chamber F.

よって、マウントＡの製造工程では、連結金具１の軸部１２に取り付けた液封入ノズルからボルト穴１２ａ、上側連通路１４、第２オリフィス通路１３を介して第２液室７０ａ，７０ｂに液体を供給するとともに、その第２オリフィス通路１３に連通する下側連通路１５を介して第１液室Ｆにも液体を供給する。そして、第１液室Ｆに液体が充填されば、下側連通路１５の上端に封止材ｂ１を打ち込んで封止し、さらに第２液室７０ａ，７０ｂにも液体が充填されれば、上側連通路１４に封止材ｂ２を打ち込んで封止する。 Therefore, in the manufacturing process of the mount A, liquid is supplied to the second liquid chambers 70a and 70b from the liquid-filled nozzle attached to the shaft portion 12 of the connection fitting 1 through the bolt hole 12a, the upper communication path 14, and the second orifice path 13. While supplying the liquid, the liquid is also supplied to the first liquid chamber F through the lower communication passage 15 communicating with the second orifice passage 13. If the first liquid chamber F is filled with a liquid, the sealing material b1 is driven into the upper end of the lower communication path 15 to seal it, and if the second liquid chambers 70a and 70b are also filled with a liquid, A sealing material b2 is driven into the upper communication path 14 and sealed.

以上の如く構成されたこの実施形態のエンジンマウントＡ（防振支持装置）によると、まず、エンジンのトルク変動が比較的小さな状態では、エンジン振動がマウントＡのゴム弾性体２により吸収され、車体への振動伝達が抑制される。このときには、エンジン側の連結金具１に設けたストッパ部７が車体側のストッパ金具８から離間しているので、これらを介してエンジン振動が車体側に伝達される心配はない。 According to the engine mount A (anti-vibration support device) of this embodiment configured as described above, first, when the torque fluctuation of the engine is relatively small, the engine vibration is absorbed by the rubber elastic body 2 of the mount A, and the vehicle body Vibration transmission to is suppressed. At this time, since the stopper portion 7 provided on the engine-side connecting fitting 1 is separated from the vehicle-body-side stopper fitting 8, there is no concern that the engine vibration is transmitted to the vehicle-body side through these.

一方、自動車の全開加速時のように大きな駆動反力（トルク）が作用すると、パワープラントがロール軸周りに回動して後傾するため、それを支持するマウントＡにおいてストッパ部７が作動する。すなわち、図５に一例を示すように、連結金具１とともに後側に移動したストッパ部７の後部がストッパ金具８のゴム層８０に当接する状態となるが、このとき、全開加速中のエンジンが比較的大きな振動を発生することから、この振動がストッパ部７を介して車室内に伝達されると、不快なこもり音を生じることになる。 On the other hand, when a large driving reaction force (torque) is applied as in the case of full acceleration of the automobile, the power plant rotates around the roll axis and tilts backward, so that the stopper portion 7 operates in the mount A that supports the power plant. . That is, as shown in an example in FIG. 5, the rear portion of the stopper portion 7 moved to the rear side together with the connection fitting 1 comes into contact with the rubber layer 80 of the stopper fitting 8. Since a relatively large vibration is generated, when this vibration is transmitted to the vehicle interior via the stopper portion 7, an unpleasant booming noise is generated.

これに対し、上述したようにストッパ部７の内部には、前後にそれぞれ第２液室７０ａ，７０ｂが設けられて、第２オリフィス通路１３によって連通されており、この第２オリフィス通路１３の寸法が、前記のように車室内にこもり音を生じるような周波数域（車種によって異なるが、大体２００〜５００Ｈｚ）に合わせてチューニングされているので、この周波数域については動ばねが大幅に低下して、振動が効果的に吸収される。 On the other hand, as described above, the second liquid chambers 70a and 70b are respectively provided in the front and rear of the stopper portion 7 and communicated with each other by the second orifice passage 13. The dimensions of the second orifice passage 13 are as follows. However, since it is tuned in accordance with the frequency range (approximately 200 to 500 Hz, which varies depending on the vehicle type) that causes a booming noise in the vehicle interior as described above, the dynamic spring is greatly reduced in this frequency range. The vibration is effectively absorbed.

しかも、前記したように、エンジン振動によって前後いずれか一方の第２液室７０ａ，７０ｂが縮小（又は拡大）するときには、筒部材７１の変位によって他方の第２液室７０ｂ，７０ａが拡大（又は縮小）することになり、第２オリフィス通路１３において液体を効率良く流動させることができる。よって、ストッパ作動状態であっても、こもり音の原因となるエンジン振動の車体側への伝達は効果的に抑制され、こもり音が十分に軽減される。 Moreover, as described above, when one of the front and rear second liquid chambers 70a and 70b is reduced (or enlarged) due to engine vibration, the displacement of the cylindrical member 71 causes the other second liquid chamber 70b and 70a to expand (or Therefore, the liquid can flow efficiently in the second orifice passage 13. Therefore, even when the stopper is in an operating state, transmission of engine vibration, which causes a booming noise, to the vehicle body side is effectively suppressed, and the booming noise is sufficiently reduced.

さらに、この実施形態ではストッパ部７を、環状のゴム部７０とその外周を覆う筒部材７１とによって構成しており、ストッパ作動時には筒部材７１の前後いずれかの部位がストッパ金具８のゴム層８０に当接して押圧されることにより、図５には誇張して示すが、筒部材７１が連結金具１のつば部１０に対して前後方向に変位することになり、両者の間の環状ゴム部７０には前後方向に圧縮力が作用するのみならず、特に左右両側の部位では大きな剪断変形を生じる。 Further, in this embodiment, the stopper portion 7 is constituted by an annular rubber portion 70 and a cylindrical member 71 that covers the outer periphery of the annular rubber portion 70. Although the cylinder member 71 is displaced in the front-rear direction with respect to the collar portion 10 of the connecting metal fitting 1 by being pressed against the pressure 80, it is exaggerated in FIG. The part 70 is not only subjected to a compressive force in the front-rear direction, but also has a large shear deformation particularly at the left and right sides.

つまり、ストッパ部７は、環状ゴム部７０において主にストッパ金具８から押圧される部位の近傍に生じる圧縮の反力だけでなく、その環状ゴム部７０の剪断変形に対する反力によっても、連結金具１と支持金具３との相対変位を規制するようになり、仮にゴム部の圧縮反力のみによって変位を規制するようにした場合に比べれば、同じ効果を得るためのゴムの剛性を低めに設定することができる。このこともストッパ部７を介しての振動伝達を抑える上で好ましい。 That is, the stopper portion 7 is not only a reaction force of the compression generated in the vicinity of the portion pressed mainly from the stopper fitting 8 in the annular rubber portion 70, but also a coupling fitting due to a reaction force against the shear deformation of the annular rubber portion 70. Compared with the case where the displacement is restricted only by the compression reaction force of the rubber part, the rigidity of the rubber for obtaining the same effect is set lower. can do. This is also preferable for suppressing vibration transmission through the stopper portion 7.

さらにまた、上述したが、この実施形態のマウントＡでは、環状ゴム部７０の成形時にその外周に凹部を形成しておき、これを筒部材７１で覆うことによって容易に第２液室７０ａ，７０ｂを設けることができる。また、その第２液室７０ａ，７０ｂへの液体の封入は、連結金具１に形成した第２オリフィス通路１３や上側連通路１４等によって、第１液室Ｆへの液体の充填と同時に行うことができる。よって製造工程の簡略化が図られる。 Furthermore, as described above, in the mount A of this embodiment, when the annular rubber portion 70 is molded, a concave portion is formed on the outer periphery thereof, and this is covered with the cylindrical member 71 so that the second liquid chambers 70a and 70b can be easily formed. Can be provided. In addition, the liquid is filled in the second liquid chambers 70a and 70b simultaneously with the filling of the liquid into the first liquid chamber F by the second orifice passage 13 and the upper communication passage 14 formed in the connection fitting 1. Can do. Therefore, the manufacturing process can be simplified.

（実施形態２）
図６〜８は、本発明の実施形態２に係るエンジンマウントＡを示す。この実施形態２は、ストッパ部７の一部の構造のみが実施形態１と異なっており、それ以外は実施形態１のものと同じなので、以下、同一部材には同一の符号を付してその説明は省略する。 (Embodiment 2)
6 to 8 show an engine mount A according to Embodiment 2 of the present invention. In this second embodiment, only a part of the structure of the stopper portion 7 is different from that of the first embodiment, and the other parts are the same as those of the first embodiment. Description is omitted.

この実施形態２のストッパ部７は、環状ゴム部７０と筒部材７１との間に、前記実施形態１のものと同様に第２液室７０ａ，７０ｂを設けるとともに、図７に示すように、それら両液室７０ａ，７０ｂ同士を連通する第２オリフィス通路７０ｅ，７０ｅも設けており、第１実施形態のように連結金具１のつば部１０貫通する通路１３は設けていない。 In the stopper portion 7 of the second embodiment, second liquid chambers 70a and 70b are provided between the annular rubber portion 70 and the cylindrical member 71 as in the first embodiment, and as shown in FIG. The second orifice passages 70e and 70e for communicating the liquid chambers 70a and 70b are also provided, and the passage 13 penetrating the collar portion 10 of the connection fitting 1 is not provided as in the first embodiment.

より詳しくは、図６、７に示すように、この実施形態の環状ゴム部７０には、第２液室７０ａ，７０ｂに対応して矩形状の開口部が形成された環状の補強金具７２が埋め込まれるとともに、左右の隔壁部７０ｃ，７０ｃの外周に周方向に延びる溝部（図８では、この溝部に符号７０ｅを付す）が形成されており、この溝部（７０ｅ）の周方向両端がそれぞれ第２液室７０ａ，７０ｂとなる凹部に連通されている。 More specifically, as shown in FIGS. 6 and 7, the annular rubber portion 70 of this embodiment has an annular reinforcing bracket 72 in which a rectangular opening is formed corresponding to the second liquid chambers 70 a and 70 b. Grooves (in FIG. 8, the reference numeral 70e is attached to the grooves in FIG. 8) are formed in the outer periphery of the left and right partition walls 70c, 70c, and both ends in the circumferential direction of the groove (70e) are respectively The two liquid chambers 70a and 70b are in communication with the recesses.

そして、図８に示すように環状ゴム部７０に筒部材７１を被せてその外周を覆い、上下にかしめて固定することによって、ストッパ部７が構成されるとともに、その内部には前記実施形態１と同様の第２液室７０ａ，７０ｂと、それらを互いに連通させる左右一対の第２オリフィス通路７０ｅ，７０ｅとが形成される。尚、筒部材７１を環状ゴム部７０にかしめて固定する必要はなく、前記実施形態１と同じく圧入接着してもよい。 Then, as shown in FIG. 8, the cylindrical rubber member 70 is covered with a cylindrical member 71 to cover the outer periphery of the annular rubber member 70, and is fixed by caulking up and down. Second liquid chambers 70a and 70b similar to the above, and a pair of left and right second orifice passages 70e and 70e that allow them to communicate with each other. Note that the cylindrical member 71 does not need to be caulked and fixed to the annular rubber portion 70, and may be press-fitted and bonded as in the first embodiment.

したがって、この実施形態２によると、ストッパ部７の環状ゴム部７０に第２液室７０ａ，７０ｂとなる凹部を形成する際に、第２オリフィス通路７０ｅ，７０ｅとなる溝部も形成しておき、これに筒部材７１を取り付けるだけで、容易に液封防振機構を構成することができる。 Therefore, according to the second embodiment, when forming the concave portions to be the second liquid chambers 70a and 70b in the annular rubber portion 70 of the stopper portion 7, the groove portions to be the second orifice passages 70e and 70e are also formed. By simply attaching the cylindrical member 71 to this, the liquid seal vibration-proof mechanism can be easily configured.

また、そうして環状ゴム部７０に形成する凹部や溝部の大きさを変更するだけで、第２オリフィス通路７０ｅの長さや断面積を調整できるので、通路１３の長さが連結金具１のつば部１０の直径に制約される実施形態１に比べて、その寸法についての制約が少なくなり、チューニングの自由度が高くなる。 In addition, since the length and the cross-sectional area of the second orifice passage 70e can be adjusted only by changing the size of the concave portion and the groove portion formed in the annular rubber portion 70, the length of the passage 13 is set to the collar of the coupling metal 1. Compared to the first embodiment in which the diameter of the portion 10 is restricted, the size is less restricted, and the degree of tuning is increased.

（実施形態３）
図９、１０は、本発明の実施形態３に係るエンジンマウントＡを示す。この実施形態３はストッパの具体的な構造が実施形態１、２と異なっており、それ以外の構造は同じなので、以下、同一部材には同一の符号を付してその説明は省略する。 (Embodiment 3)
9 and 10 show an engine mount A according to Embodiment 3 of the present invention. In the third embodiment, the specific structure of the stopper is different from those of the first and second embodiments, and the other structures are the same. Therefore, the same members are denoted by the same reference numerals and the description thereof is omitted.

この実施形態３のマウントＡでは、前記実施形態１、２のように連結金具１にストッパ部７を設けるのではなく、それを囲む外周側のストッパ金具８にストッパ部９を設けている。すなわち、ストッパ金具８の内周に全周に亘って環状ゴム部９０を設け、その内周面を連結金具１のつば部１０’の外周面と対向させている。尚、図１０から分かるように、この例ではつば部１０’の断面は円形ではなく異形状であり、その外周面はゴム弾性体２やストッパゴム６と一体のゴム層１６によって覆われているが、このゴム層１６はなくてもよい。 In the mount A of this third embodiment, the stopper portion 7 is not provided on the connecting metal fitting 1 as in the first and second embodiments, but the stopper portion 9 is provided on the outer peripheral metal fitting 8 surrounding it. That is, the annular rubber portion 90 is provided over the entire inner periphery of the stopper metal member 8, and the inner peripheral surface thereof is opposed to the outer peripheral surface of the collar portion 10 ′ of the connecting metal member 1. As can be seen from FIG. 10, in this example, the cross section of the collar portion 10 ′ is not circular but has an irregular shape, and its outer peripheral surface is covered with a rubber layer 16 integrated with the rubber elastic body 2 and the stopper rubber 6. However, the rubber layer 16 may be omitted.

また、前記環状ゴム部９０には円筒状の補強金具９１が埋め込まれており、図の例では補強金具９１の下端には外側に張り出したフランジが形成され、このフランジが、ストッパ金具８の下端フランジや支持金具３の内筒３１の上端フランジとともに、外筒３２の上端に形成されたコ字状部によってかしめられている。 In addition, a cylindrical reinforcing metal member 91 is embedded in the annular rubber part 90. In the example shown in the figure, a flange projecting outward is formed at the lower end of the reinforcing metal member 91, and this flange is the lower end of the stopper metal member 8. Together with the flange and the upper end flange of the inner cylinder 31 of the support fitting 3, it is caulked by a U-shaped part formed at the upper end of the outer cylinder 32.

そうして実施形態１、２よりも外周側に設ければスペースを確保しやすいので、この実施形態３ではストッパ部９の環状ゴム部９０に第２液室９０ａ，９０ｂと第２オリフィス通路９０ｃとを２組、設けている。すなわち、環状ゴム部９０には、連結金具１の異形のつば部１０’を挟んで前後方向に対峙するように、２つの第２液室９０ａ，９０ａが形成されるとともに、図１０にのみ示すが、つば部１０’を挟んで左右方向（交差方向）に対峙するように２つの第２液室９０ｂ，９０ｂが形成されている。 In this embodiment, the second liquid chambers 90a and 90b and the second orifice passage 90c are formed in the annular rubber portion 90 of the stopper portion 9 because it is easy to secure a space if provided on the outer peripheral side of the first and second embodiments. 2 sets are provided. That is, in the annular rubber part 90, two second liquid chambers 90a and 90a are formed so as to face each other in the front-rear direction across the deformed collar part 10 'of the coupling metal 1, and only shown in FIG. However, the two second liquid chambers 90b and 90b are formed so as to face each other in the left-right direction (cross direction) across the collar portion 10 '.

また、それら４つの第２液室９０ａ，…，９０ｂ，…のうち、互いに周方向に隣り合う２つずつ（図の例では前側の第２液室９０ａ及び右側の第２液室９０ｂと、後側の第２液室９０ａ及び左側の第２液室９０ｂ）を連通するように、周方向に延びる２つの第２オリフィス通路９０ｃ、９０ｃが形成されている。さらに、左右両側の第２液室９０ｂ，９０ｂのそれぞれに臨むように、環状ゴム部９０の内周面には他の部位よりも薄肉の膜状部９０ｄが形成され、この膜状部９０ｄの変形によって第２液室ｂの容積変化が許容されるようになっている。 Also, two of the four second liquid chambers 90a, ..., 90b, ... are adjacent to each other in the circumferential direction (in the example shown in the figure, the front second liquid chamber 90a and the right second liquid chamber 90b, Two second orifice passages 90c and 90c extending in the circumferential direction are formed so as to communicate the second liquid chamber 90a on the rear side and the second liquid chamber 90b on the left side. Further, a thin film-like part 90d is formed on the inner peripheral surface of the annular rubber part 90 so as to face the second liquid chambers 90b, 90b on both the left and right sides. The volume change of the second liquid chamber b is allowed by the deformation.

そして、この実施形態３によると、例えば自動車の全開加速時にパワープラントが後傾し、マウントＡにおいて連結金具１が後側に移動して、そのつば部１０’の後部がストッパ部９の環状ゴム部９０に当接すると、この環状ゴム部９０において後側の第２液室９０ａが圧縮されて液圧が増大し、第２オリフィス通路９０ｃを介して左側の第２液室９０ｂに液体が流動する。これを受けて左側の第２液室９０ｂでは膜状部９０ｄが膨出することにより、体積補償が行われる。 According to the third embodiment, for example, the power plant tilts backward when the automobile is fully opened, the connecting fitting 1 moves rearward in the mount A, and the rear portion of the collar portion 10 ′ is the annular rubber of the stopper portion 9. When it comes into contact with the portion 90, the second liquid chamber 90a on the rear side is compressed in the annular rubber portion 90 to increase the liquid pressure, and the liquid flows into the second liquid chamber 90b on the left side through the second orifice passage 90c. To do. In response to this, volume compensation is performed by the film-like portion 90d bulging in the second liquid chamber 90b on the left side.

一方、自動車の急減速時にはパワープラントが前傾して連結金具１が前側に移動するので、ストッパ部９の環状ゴム部９０において前側の第２液室９０ａが圧縮され、第２オリフィス通路９０ｃを介して右側の第２液室９０ｂに液体が流動して、前記と同様に膜状部９０ｄの膨出によって体積補償が行われることになる。 On the other hand, when the vehicle is suddenly decelerated, the power plant is tilted forward and the connection fitting 1 moves to the front side. Therefore, the front second liquid chamber 90a is compressed in the annular rubber portion 90 of the stopper portion 9, and the second orifice passage 90c is passed through. Thus, the liquid flows into the second liquid chamber 90b on the right side, and volume compensation is performed by the swelling of the film-like portion 90d as described above.

したがって、この実施形態３のマウントＡでは、自動車の全開加速時及び急減速時のようにエンジンの振動状態が大きく異なり、求められる防振特性も大きく異なる２つの状態にそれぞれ対応して、ストッパ部９に２組の液封防新機構を備えており、いずれか１組を一方（例えば加速時）の要求に合わせてチューニングするとともに、別の組を他方（例えば減速時）の要求に合わせてチューニングすることができるから、全開加速時と急減速時のそれぞれに最適な防振特性を実現できる。 Therefore, in the mount A of the third embodiment, the stopper portion corresponds to each of two states in which the vibration state of the engine is greatly different and the required vibration isolation characteristics are greatly different, such as when the vehicle is fully opened and suddenly decelerated. 9 is equipped with two new liquid seal prevention mechanisms, one of which is tuned to the demand of one (for example, during acceleration) and the other group is tuned to the demand of the other (for example, at the time of deceleration). Because tuning is possible, it is possible to achieve the optimal vibration isolation characteristics during full-open acceleration and sudden deceleration.

尚、図示のように環状ゴム部９０には、液室９０ａに臨むストッパ金具８の内周面に当接することにより、過大な変形によるゴム部９０の破損を防止するためのブロック部９０ｅが設けられている。 As shown in the figure, the annular rubber portion 90 is provided with a block portion 90e for preventing damage to the rubber portion 90 due to excessive deformation by contacting the inner peripheral surface of the stopper fitting 8 facing the liquid chamber 90a. It has been.

尚、本発明に係る防振支持装置の構成は、前記した実施形態１〜３に限定されるものではなく、その以外の種々の構成をも包含する。例えば実施形態１、２では、ストッパ部７の外周の筒部材７１を金属製としているが、これはゴムよりも剛性の高いものであればよく、例えば樹脂製とすることもできる。 In addition, the structure of the vibration isolating support apparatus which concerns on this invention is not limited to above-mentioned Embodiment 1-3, Various structures other than that are included. For example, in the first and second embodiments, the cylindrical member 71 on the outer periphery of the stopper portion 7 is made of metal, but it may be made of any material that has higher rigidity than rubber, and may be made of resin, for example.

また、図１１には前記実施形態１について一例を示すが、前記各実施形態においてストッパ金具８に、その上端フランジの内周縁から折れ曲がって上方に延びる筒状の突出部８ａを設けて、その内周のゴム層を介して連結金具１の軸部１２と当接させるようにしてもよい。すなわち、各実施形態のようにストッパ部７，９の内部に液室７０ａ，…９０ａ，…等を形成すると、大きな負荷が加わったときに破壊する虞れがあるので、特に負荷の大きいときには、その一部を前記突出部８ａと軸部１２との間で受け止めるものである。 FIG. 11 shows an example of the first embodiment. In each of the embodiments, the stopper fitting 8 is provided with a cylindrical protrusion 8a that is bent from the inner peripheral edge of the upper end flange and extends upward. You may make it contact | abut with the axial part 12 of the connection metal fitting 1 through the surrounding rubber layer. That is, if the liquid chambers 70a,... 90a,... Are formed inside the stopper portions 7 and 9 as in the embodiments, there is a risk of destruction when a large load is applied. A part thereof is received between the protruding portion 8 a and the shaft portion 12.

前記各実施形態では、本発明の防振支持装置をいわゆる縦置きのエンジンマウントＡに適用しているが、これに限らず、横置きのエンジンマウントにも適用することができるし、エンジンマウントに限らずサスペンションブッシュ等にも適用できる。さらに、自動車用途に限定されることもない。 In each of the embodiments described above, the vibration isolating support device of the present invention is applied to the so-called vertical engine mount A, but is not limited thereto, and can be applied to a horizontal engine mount. Not limited to suspension bushings. Furthermore, it is not limited to automobile use.

以上、説明したように、本発明の防振支持装置は、ストッパの機能を確保しつつ自動車の全開加速時のこもり音を十分に軽減できるので、自動車用のエンジンマウントとして好適である。 As described above, the anti-vibration support device of the present invention is suitable as an engine mount for automobiles because it can sufficiently reduce the muffled noise during full opening acceleration of the automobile while ensuring the function of the stopper.

エンジンマウントの外観を示す斜視図である。It is a perspective view which shows the external appearance of an engine mount. 同ストッパの構造を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the stopper. 同内部構造を縦断面で示す斜視図である。It is a perspective view which shows the internal structure in a longitudinal cross section. 同横断面図である。FIG. ストッパが作動した状態の図４相当図である。FIG. 5 is a view corresponding to FIG. 4 in a state where the stopper is operated. 実施形態２に係るマウントの縦断面図である。6 is a longitudinal sectional view of a mount according to Embodiment 2. FIG. 同横断面図である。FIG. 同ストッパの構造を示す分解斜視図である。It is a disassembled perspective view which shows the structure of the stopper. 実施形態３に係るマウントの縦断面図である。It is a longitudinal cross-sectional view of the mount concerning Embodiment 3. 同横断面図である。FIG. 他の実施形態に係る図３相当図である。FIG. 6 is a view corresponding to FIG. 3 according to another embodiment.

Ａエンジンマウント（液体封入式防振支持装置）
Ｆ第１液室
ｆ１受圧室
ｆ２平衡室
Ｐ第１オリフィス通路
Ｚ軸線
１連結金具
２ゴム弾性体
３支持金具
４オリフィス盤（仕切り部）
７ストッパ部（ストッパ）
７０環状ゴム部
７０ａ，７０ｂ第２液室
７０ｅ第２オリフィス通路
７１筒部材（環状壁部）
８ストッパ金具（囲繞壁部）
９ストッパ部
９０環状ゴム部
９０ａ，９０ｂ第２液室
９０ｃ第２オリフィス通路
９０ｄ膜状部
１２ボルト穴（第１連通路）
１３第２オリフィス通路
１４上側連通路（第１連通路）
１５下側連通路（第２連通路） A Engine mount (liquid-filled anti-vibration support device)
F First liquid chamber f1 Pressure receiving chamber f2 Equilibrium chamber P First orifice passage Z Axis 1 Connection fitting 2 Rubber elastic body 3 Support fitting 4 Orifice panel (partition part)
7 Stopper (Stopper)
70 annular rubber part 70a, 70b second liquid chamber 70e second orifice passage 71 cylinder member (annular wall part)
8 Stopper bracket (Go wall)
9 Stopper portion 90 Ring rubber portion 90a, 90b Second liquid chamber 90c Second orifice passage 90d Membrane portion 12 Bolt hole (first communication passage)
13 Second orifice passage 14 Upper communication passage (first communication passage)
15 Lower communication path (second communication path)

Claims

A connection fitting connected to the supported body side, a support fitting for supporting this via a rubber elastic body, and a first liquid formed between the metal fittings so that the volume changes with deformation of the rubber elastic body. The liquid-filled vibration-proof support device includes a chamber, a partition that partitions the interior of the first liquid chamber into a pressure receiving chamber and an equilibrium chamber, and a first orifice passage that communicates the pressure receiving chamber and the equilibrium chamber. And
At least one of the connection fitting and the support fitting is provided with a stopper having a rubber part so as to come into contact with the other fitting with their relative displacement,
The stopper is provided with at least two second liquid chambers and a second orifice passage communicating them so that the volume changes with deformation of the rubber part due to contact with the other metal fitting ,
One of the connection fitting and the support fitting has a surrounding portion that circulates an axis in the direction in which the static load of the supported body is input, and the other fitting surrounds the surrounding wall portion that surrounds the outer periphery of the surrounding portion. Are provided,
The stopper includes an annular rubber portion provided over the entire circumference of the circumferential portion of the one metal fitting, and a relatively high-rigidity annular wall portion covering the outer circumference, and the annular wall portion. A gap is formed between the outer periphery of and the inner periphery of the surrounding wall of the other metal fitting,
A pair of second liquid chambers are formed between the annular rubber portion and the annular wall portion of the stopper so as to face each other in a predetermined direction with one metal fitting interposed therebetween,
The liquid-filled vibration-proof support device, wherein the one metal fitting is formed with a second orifice passage through which the paired second liquid chambers communicate with each other .

One metal fitting has one end open to the outside and the other end communicating with the second orifice passage, and one end facing the second orifice passage so as to oppose the communicating portion with the first communication passage. The anti-vibration support device according to claim 1, further comprising a second communication path that communicates with the second liquid passage and communicates with the first liquid chamber at the other end.

A connection fitting connected to the supported body side, a support fitting for supporting this via a rubber elastic body, and a first liquid formed between the metal fittings so that the volume changes with deformation of the rubber elastic body. The liquid-filled vibration-proof support device includes a chamber, a partition that partitions the interior of the first liquid chamber into a pressure receiving chamber and an equilibrium chamber, and a first orifice passage that communicates the pressure receiving chamber and the equilibrium chamber. And
At least one of the connection fitting and the support fitting is provided with a stopper having a rubber part so as to come into contact with the other fitting with their relative displacement,
The stopper is provided with at least two second liquid chambers and a second orifice passage communicating them so that the volume changes with deformation of the rubber part due to contact with the other metal fitting,
One of the connection fitting and the support fitting has a surrounding portion that circulates an axis in the direction in which the static load of the supported body is input, and the other fitting surrounds the surrounding wall portion that surrounds the outer periphery of the surrounding portion. Are provided,
The stopper includes an annular rubber portion provided over the entire circumference of the circumferential portion of the one metal fitting, and a relatively high-rigidity annular wall portion covering the outer circumference, and the annular wall portion. A gap is formed between the outer periphery of and the inner periphery of the surrounding wall of the other metal fitting,
A pair of second liquid chambers are formed between the annular rubber portion and the annular wall portion of the stopper so as to face each other in a predetermined direction with one metal fitting interposed therebetween, and the second liquid forming the pair A second orifice passage communicating the chambers is formed extending in the circumferential direction
A liquid-filled vibration-proof support device characterized by that .

A connection fitting connected to the supported body side, a support fitting for supporting this via a rubber elastic body, and a first liquid formed between the metal fittings so that the volume changes with deformation of the rubber elastic body. The liquid-filled vibration-proof support device includes a chamber, a partition that partitions the interior of the first liquid chamber into a pressure receiving chamber and an equilibrium chamber, and a first orifice passage that communicates the pressure receiving chamber and the equilibrium chamber. And
At least one of the connection fitting and the support fitting is provided with a stopper having a rubber part so as to come into contact with the other fitting with their relative displacement,
The stopper is provided with at least two second liquid chambers and a second orifice passage communicating them so that the volume changes with deformation of the rubber part due to contact with the other metal fitting,
One of the connection fitting and the support fitting has a surrounding portion that circulates an axis in the direction in which the static load of the supported body is input, and the other fitting surrounds the surrounding wall portion that surrounds the outer periphery of the surrounding portion. Are provided,
The stopper has an annular rubber portion provided over the entire circumference of the surrounding wall portion of the other metal fitting, and an inner circumference of the annular rubber portion and an outer circumference of a circumferential portion of the one metal fitting. There is a gap between them,
In the annular rubber part of the stopper, two second liquid chambers are formed so as to face each other in a predetermined direction with one metal fitting interposed therebetween, and so as to face each other in a crossing direction intersecting the predetermined direction, In addition, two second liquid chambers are formed,
Of the four second liquid chambers, two adjacent each other in the circumferential direction communicate with each other to form two second orifice passages extending in the circumferential direction, respectively.
A thin film-like portion is formed on the inner peripheral surface of the annular rubber portion so as to face each of the two second liquid chambers facing each other in the intersecting direction.
A liquid-filled vibration-proof support device characterized by that .