JP2007321964A - Vibration control device - Google Patents

Vibration control device Download PDF

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Publication number
JP2007321964A
JP2007321964A JP2006156283A JP2006156283A JP2007321964A JP 2007321964 A JP2007321964 A JP 2007321964A JP 2006156283 A JP2006156283 A JP 2006156283A JP 2006156283 A JP2006156283 A JP 2006156283A JP 2007321964 A JP2007321964 A JP 2007321964A
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vibration
main body
vibration isolator
stopper
outer peripheral
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JP2006156283A
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JP4976056B2 (en
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Yukihiro Sugimoto
幸大 杉本
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Bridgestone Corp
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Bridgestone Corp
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Priority to JP2006156283A priority Critical patent/JP4976056B2/en
Priority to PCT/JP2007/061331 priority patent/WO2007142215A1/en
Priority to CN2007800209049A priority patent/CN101460761B/en
Priority to EP07744688.8A priority patent/EP2025968B1/en
Priority to US12/303,473 priority patent/US8061694B2/en
Publication of JP2007321964A publication Critical patent/JP2007321964A/en
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Publication of JP4976056B2 publication Critical patent/JP4976056B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a stopper mechanism for limiting excessive displacement along a lateral direction or a longitudinal direction orthogonal to the axial direction of a connecting member without enlarging a device size. <P>SOLUTION: In the vibration control device 10, a connecting rod 12 penetrates a cavity 104 of a rubber elastic body 44 and the inner peripheral side of a body plate 14, and a stopper rubber 98 fixed to the outer peripheral side of a rod body 13 of the connecting rod 12 is disposed in the cavity 104 of the rubber elastic body 44. The rod body 13 disposed overlapping with the rubber elastic body 44 along the axial direction of the connecting rod 12 can thereby be placed in a state of being enclosed inside the device, and a stopper mechanism can be composed of a stopper member 96 fixed to the rod body 13 of the connecting rod 12. The dimension along the axial direction of the device can thereby be prevented from being enlarged by the stopper mechanism for preventing excessive displacement along a right-angled direction to the axis of the connecting rod 12 while suppressing a dimensional increase along the axial direction of the device. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えば、自動車、一般産業用機械等に適用され、エンジン等の振動発生部から車体等の振動受部へ伝達される振動を減衰及び吸収する防振装置に関する。   The present invention relates to a vibration isolator that is applied to, for example, an automobile, a general industrial machine, and the like and attenuates and absorbs vibration transmitted from a vibration generating unit such as an engine to a vibration receiving unit such as a vehicle body.

従来から、自動車等の車両においては、主な振動発生源であるエンジンやギヤボックスを含むパワーユニットから車体への振動伝達を抑えて優れた乗り心地を実現すると共に、車体に取り付けられた各種部材を振動から保護するために、パワーユニットが防振装置としてのエンジンマウントを介して車体に支持されている。かかる防振装置を用いたパワーユニットのマウント方式としては、ペンデュラム方式等の吊下げ方式があり、このような吊下げ方式に用いられる防振装置としては、特許文献1及び特許文献2に記載されているものが知られている。   Conventionally, in vehicles such as automobiles, vibration transmission from a power unit including an engine and a gear box, which are main vibration sources, to a vehicle body is suppressed, and excellent ride comfort is achieved, and various members attached to the vehicle body are provided. In order to protect from vibration, the power unit is supported on the vehicle body via an engine mount as a vibration isolator. As a mounting method of a power unit using such an anti-vibration device, there is a suspension method such as a pendulum method, and the anti-vibration device used in such a suspension method is described in Patent Document 1 and Patent Document 2. What is known.

特許文献1に記載された防振装置は、下側サポートプレートと上側サポートプレートとの間に配置された肉厚円筒状のエラストマーボディ(弾性体)と、下側サポートプレート及び弾性体の中心部を貫通し、上端部が上側サポートプレートに連結固定される連結ロッド(連結部材)とを備えている。   The vibration isolator described in Patent Document 1 includes a thick cylindrical elastomer body (elastic body) disposed between a lower support plate and an upper support plate, and a lower support plate and a central portion of the elastic body. And a connecting rod (connecting member) whose upper end is connected and fixed to the upper support plate.

また特許文献2に記載された防振装置は、上端部がマウント本体の内部でゴム本体(弾性体)に連結されると共に、下端側がマウント本体から突出した軸部(連結部材)と、この連結部材の下端部に連結固定される連結アームと、この連結アームの外側を覆ったゴムストッパとを備えている。この防振装置では、車両前後方向又は左右方向に沿った荷重入力時に、ゴムストッパを介して連結アームが防振装置の脚部に当接することにより、連結部材の車両前後方向又は左右方向の過大な変位が阻止される。
特開平10−30675号公報 特開2004−263785号公報
Further, the vibration isolator described in Patent Document 2 has an upper end connected to a rubber main body (elastic body) inside the mount body, and a lower end projecting from the mount main body (connecting member), and this connection. A connecting arm connected and fixed to the lower end of the member and a rubber stopper covering the outside of the connecting arm are provided. In this vibration isolator, when a load is input along the vehicle front-rear direction or the left-right direction, the connecting arm abuts against the leg portion of the vibration isolator via the rubber stopper, so that the connecting member is excessively large in the vehicle front-rear direction or the left-right direction. Displacement is prevented.
Japanese Patent Laid-Open No. 10-30675 JP 2004-263785 A

ところで、特許文献1の防振装置では、下側サポートプレートの中央部に円筒状の軸方向ダクトを一体的に形成し、この軸方向ダクトの内周側を挿通する連結部材と軸方向ダクトとの間に弾性体を隙間なく充填することにより、連結部材の前後方向又は左右方向の過大な変位を制限している。しかし、このような構造を採った場合、前後方向又は左右方向に沿った振動伝達率も高いものになり、前後方向又は左右方向に沿った振動を効果的に吸収できなくなる。   By the way, in the vibration isolator of patent document 1, the cylindrical axial duct is integrally formed in the center part of the lower support plate, and the connecting member and the axial duct are inserted through the inner peripheral side of the axial duct. By filling the elastic body without any gap between them, excessive displacement of the connecting member in the front-rear direction or the left-right direction is limited. However, when such a structure is adopted, the vibration transmissibility along the front-rear direction or the left-right direction also becomes high, and vibration along the front-rear direction or the left-right direction cannot be effectively absorbed.

また特許文献2の防振装置では、特許文献1の防振装置と比較し、装置の高さ方向(軸方向)に沿った寸法を拡大しなければ、連結部材の軸方向に沿った寸法を長くすることができず、前後方向又は左右方向に沿った振動に対する連結部材の倒れ量が相対的に大きいものになるため、弾性体の耐久性が低下するという問題が生じやすい。さらに特許文献2の防振装置では、軸方向に沿ってマウント本体の下方に配置された連結アーム、この連結アームの外側を覆ったストッパゴム及び、マウント本体を車体側へ連結する脚部によりストッパ機構が構成されていることから、このストッパ機構を配置するために装置の軸方向に沿った寸法が不可避的に拡大する。   Moreover, in the vibration isolator of patent document 2, compared with the vibration isolator of patent document 1, if the dimension along the height direction (axial direction) of the apparatus is not enlarged, the dimension along the axial direction of the connecting member is increased. Since the length of the connecting member with respect to the vibration along the front-rear direction or the left-right direction cannot be increased, the amount of collapse of the connecting member is relatively large, and the problem that the durability of the elastic body is reduced is likely to occur. Further, in the vibration isolator of Patent Document 2, a connecting arm disposed below the mount body along the axial direction, a stopper rubber covering the outside of the connecting arm, and a leg portion for connecting the mount body to the vehicle body side. Since the mechanism is configured, the dimension along the axial direction of the apparatus is inevitably enlarged in order to arrange the stopper mechanism.

本発明の目的は、上記事実を考慮して、装置サイズを拡大することなく、連結部材の軸方向に沿った長さを十分に長いものにでき、かつ連結部材の軸方向に直交する前後方向又は左右方向に沿った過大な変位を制限するストッパ機構を設けることができる防振装置を提供することにある。   The object of the present invention is to allow the length along the axial direction of the connecting member to be sufficiently long without enlarging the apparatus size in consideration of the above fact, and the front-rear direction orthogonal to the axial direction of the connecting member Another object of the present invention is to provide a vibration isolator that can be provided with a stopper mechanism that limits excessive displacement along the left-right direction.

上記課題を解決するため、本発明の請求項1に係る防振装置は、環状に形成され、振動受部に連結される第1の本体部材と、前記第1の本体部材の内周側を貫通すると共に、該第1の本体部材から外側へ突出した基端側が振動発生部に連結されるロッド状の連結部材と、前記連結部材における前記第1の本体部材から外側へ突出した先端部に連結固定される第2の本体部材と、前記連結部材の外周側であって、前記第1の本体部材と前記第2の本体部材との間に配置され、前記第1の本体部材と前記第2の本体部材とを弾性的に連結した略筒状の弾性体と、を有し、前記弾性体の中央部に前記連結部材が貫通する空洞部を形成し、前記空洞部内にストッパゴムを配置すると共に、前記ストッパゴムを前記連結部材の外周側に固定して、該ストッパゴムの外周面を前記第1の本体部材の内周面へ所定の間隔を空けて対向させたことを特徴とする。   In order to solve the above-described problem, a vibration isolator according to claim 1 of the present invention includes a first main body member formed in an annular shape and connected to a vibration receiving portion, and an inner peripheral side of the first main body member. A rod-shaped connecting member that penetrates and protrudes outward from the first main body member is connected to the vibration generating portion, and a distal end portion that protrudes outward from the first main body member in the connecting member. A second main body member to be coupled and fixed, and disposed on the outer peripheral side of the coupling member, between the first main body member and the second main body member, and the first main body member and the first main body member; A substantially cylindrical elastic body elastically connected to the main body member 2, a cavity through which the coupling member penetrates is formed at the center of the elastic body, and a stopper rubber is disposed in the cavity In addition, the stopper rubber is fixed to the outer peripheral side of the connecting member to The outer peripheral surface of Pagomu to the inner peripheral surface of the first body member at a predetermined distance, characterized in that is opposed.

上記請求項1に係る防振装置では、前記弾性体の中央部に前記連結部材が貫通する空洞部を形成し、この空洞部内に弾性材料からなるストッパゴムを配置すると共に、ストッパゴムを連結部材の外周側に固定して、第1の本体部材の内周面へ所定の間隔を空けて対向させたことにより、連結部材の軸方向に直交する前後方向又は左右方向(以下、これらの方向を包括して「軸直角方向」という。)に沿った荷重が連結部材を介して装置に入力すると、弾性体に弾性変形が生じると共に、第2の本体部との連結部を中心としてロッド状の連結部材が揺動しつつ荷重の入力方向に沿って変位する。   In the vibration isolator according to the first aspect, a hollow portion through which the connecting member passes is formed in the central portion of the elastic body, a stopper rubber made of an elastic material is disposed in the hollow portion, and the stopper rubber is connected to the connecting member. Is fixed to the outer peripheral side of the first body member, and is opposed to the inner peripheral surface of the first main body member with a predetermined interval, so that the front-rear direction or the left-right direction orthogonal to the axial direction of the connecting member (hereinafter referred to as these directions). When the load along the “perpendicular direction” is input to the apparatus via the connecting member, the elastic body is elastically deformed and the rod-like shape is formed around the connecting portion with the second main body portion. The connecting member is displaced along the load input direction while swinging.

このとき、入力荷重が小さく連結部材の横方向に沿った変位量がストッパゴムの外周面と第1の本体部材の内周面との間隔よりも小さい場合には、連結部材の横方向に沿った変位が第1の本体部材の内周面により制限されることなく、荷重入力に伴って生じる連結部材の軸直角方向に沿った変位(振動)が弾性体の弾性変形により徐々に減衰される。   At this time, when the input load is small and the amount of displacement along the lateral direction of the connecting member is smaller than the distance between the outer peripheral surface of the stopper rubber and the inner peripheral surface of the first main body member, the connecting member is moved along the lateral direction. The displacement (vibration) along the direction perpendicular to the axis of the connecting member caused by the load input is gradually attenuated by the elastic deformation of the elastic body, without being limited by the inner peripheral surface of the first main body member. .

また入力荷重が大きく、連結部材にストッパゴムの外周面と第1の本体部材の内周面との間隔と一致する軸直角方向に沿った変位が生じると、ストッパゴムが第1の本体部材の内周面へ当接して弾性変形することにより、連結部材の軸直角方向に沿った変位が制限される。   When the input load is large and the connecting member is displaced along the direction perpendicular to the axis, which coincides with the distance between the outer peripheral surface of the stopper rubber and the inner peripheral surface of the first main body member, the stopper rubber is attached to the first main body member. By abutting on the inner peripheral surface and elastically deforming, the displacement along the direction perpendicular to the axis of the connecting member is limited.

また請求項1に係る防振装置では、弾性体の中央部に形成された空洞部及び第1の本体部材の内周側を連結部材が貫通すると共に、連結部材の外周側に固定されたストッパゴムが空洞部内に配置されていることから、連結部材の軸方向に沿って弾性体と重なって配置される部分を装置内部に収納した状態にでき、この連結部材の空洞部内に収納された部分に固定されたストッパゴムによりストッパ機構を構成できるので、装置の軸方向に沿った寸法増加を抑制しつつ、連結部材の軸方向に沿った寸法を長くすることができると共に、連結部材の横方向に沿った過大な変位を防止するためのストッパ機構により装置の軸方向に沿った寸法が拡大すること防止できる。   Further, in the vibration isolator according to claim 1, the connecting member penetrates the hollow portion formed in the central portion of the elastic body and the inner peripheral side of the first main body member, and the stopper is fixed to the outer peripheral side of the connecting member. Since the rubber is disposed in the cavity, the portion disposed overlapping the elastic body along the axial direction of the connecting member can be stored in the apparatus, and the portion stored in the cavity of the connecting member Since the stopper mechanism can be configured by the stopper rubber fixed to the device, the dimension along the axial direction of the connecting member can be increased while suppressing the increase in the dimension along the axial direction of the apparatus, and the lateral direction of the connecting member It is possible to prevent the dimension along the axial direction of the apparatus from being increased by a stopper mechanism for preventing excessive displacement along the axis.

また本発明の請求項2に係る防振装置は、請求項1記載の防振装置において、前記弾性体と一体的に形成され、前記第1の本体部材の内周面における少なくとも前記ストッパゴムに対向する領域を被覆する弾性被覆部を有することを特徴とする。   A vibration isolator according to claim 2 of the present invention is the vibration isolator according to claim 1, wherein the vibration isolator is integrally formed with the elastic body, and at least the stopper rubber on the inner peripheral surface of the first main body member. It has the elastic coating | coated part which coat | covers the area | region which opposes, It is characterized by the above-mentioned.

また本発明の請求項3に係る防振装置は、請求項1又は2記載の防振装置において、前記第1の本体部材の内周面及び前記ストッパゴムの外周面の少なくとも一方の断面形状を非円形としたことを特徴とする。   The vibration isolator according to claim 3 of the present invention is the vibration isolator according to claim 1 or 2, wherein at least one of the inner peripheral surface of the first main body member and the outer peripheral surface of the stopper rubber has a cross-sectional shape. It is characterized by being non-circular.

また本発明の請求項4に係る防振装置は、請求項1乃至3の何れか1項記載の防振装置において、前記弾性体と前記ストッパゴムを、入力振動に対する特性がそれぞれ異なるゴム材料により形成したことを特徴とする。   A vibration isolator according to claim 4 of the present invention is the vibration isolator according to any one of claims 1 to 3, wherein the elastic body and the stopper rubber are made of rubber materials having different characteristics against input vibration. It is formed.

また本発明の請求項5に係る防振装置は、請求項1乃至4の何れか1項記載の防振装置において、液体が封入され前記弾性体を隔壁の一部とする主液室、液体が封入されて内容積が拡縮可能とされた副液室及び、前記主液室と前記副液室とを互いに連通させる制限通路を設けたことを特徴とする。   A vibration isolator according to claim 5 of the present invention is the vibration isolator according to any one of claims 1 to 4, wherein a liquid is enclosed and a main liquid chamber having the elastic body as a part of a partition, a liquid Is provided with a secondary liquid chamber in which the internal volume can be expanded and contracted, and a restriction passage for communicating the main liquid chamber and the secondary liquid chamber with each other.

本発明の請求項6に係る防振装置は、請求項5記載の防振装置において、前記主液室、前記副液室及び、前記制限通路をそれぞれ前記連結部材の外周側に配置したことを特徴とする。   The vibration isolator according to claim 6 of the present invention is the vibration isolator according to claim 5, wherein the main liquid chamber, the sub liquid chamber, and the restriction passage are arranged on the outer peripheral side of the connecting member. Features.

以上説明したように本発明の防振装置によれば、装置サイズを拡大することなく、連結部材の軸方向に沿った長さを十分に長いものにでき、かつ連結部材の軸方向に直交する前後方向又は左右方向に沿った過大な変位を制限するストッパ機構を設けることができる。   As described above, according to the vibration isolator of the present invention, the length along the axial direction of the connecting member can be made sufficiently long without increasing the device size, and is orthogonal to the axial direction of the connecting member. A stopper mechanism that limits excessive displacement along the front-rear direction or the left-right direction can be provided.

以下、本発明の実施形態に係る防振装置について図面を参照して説明する。   Hereinafter, a vibration isolator according to an embodiment of the present invention will be described with reference to the drawings.

(第1の実施形態)
図1には本発明の第1の実施形態に係る防振装置が示されている。この防振装置10は、自動車等の車両における振動発生部であるエンジン及びギヤボックスを含むパワーユニットを振動受部である車体へ支持するマウント装置として適用されるものである。なお、図1にて符合Sは装置の軸心を示しており、この軸心Sに沿った方向を装置の軸方向として以下の説明を行う。
(First embodiment)
FIG. 1 shows a vibration isolator according to a first embodiment of the present invention. The vibration isolator 10 is applied as a mount device that supports a power unit including an engine and a gear box as a vibration generating unit in a vehicle such as an automobile to a vehicle body as a vibration receiving unit. In FIG. 1, the symbol S indicates the axial center of the apparatus, and the following description will be made with the direction along the axial center S as the axial direction of the apparatus.

図1に示されるように、防振装置10には、その中心部に軸方向に延在する略丸棒状の連結ロッド12が設けられると共に、この連結ロッド12の外周側にプレート状の本体プレート14が配置されている。連結ロッド12には、軸方向中間部に外径が略一定とされたロッド本体13が設けられると共に、このロッド本体13に対して上端側及び下端側にそれぞれネジ軸16及びネジ軸18が一体的に設けられている。ここで、ネジ軸16はロッド本体13よりも細径とされており、これにより、ロッド本体13とネジ軸16との間には環状の段差部20が形成される。ネジ軸16の外周側には、段差部21と当接するようにリング状のスペーサ21が嵌め込まれている。   As shown in FIG. 1, the vibration isolator 10 is provided with a substantially round bar-like connecting rod 12 extending in the axial direction at the center thereof, and a plate-like body plate on the outer peripheral side of the connecting rod 12. 14 is arranged. The connecting rod 12 is provided with a rod body 13 whose outer diameter is substantially constant at an axially intermediate portion, and a screw shaft 16 and a screw shaft 18 are integrated with the rod body 13 on the upper end side and the lower end side, respectively. Provided. Here, the screw shaft 16 has a diameter smaller than that of the rod main body 13, whereby an annular stepped portion 20 is formed between the rod main body 13 and the screw shaft 16. A ring-shaped spacer 21 is fitted on the outer peripheral side of the screw shaft 16 so as to contact the stepped portion 21.

連結ロッド12のネジ軸18はロッド本体13よりも若干小径とされており、連結ロッド12におけるロッド本体13とネジ軸18との間は、ロッド本体13よりも大径の鍔部22が一体的に形成されている。この鍔部22の下面側は、軸方向に対して傾斜したテーパ状の当接面23とされている。防振装置10では、ネジ軸16の外周側に略有底円筒状に形成された本体ケーシング24が配置されている。本体ケーシング24には、その内周側に略円筒状の内筒金具26が設けられると共に、この内筒金具26の外周側に略円筒状の外筒金具28が配置されている。内筒金具26には、その下端部に内周側へ延出する環状のフランジ部30が屈曲形成されており、外筒金具28にも、その下端部に内周側へ延出する環状のフランジ部32が屈曲形成されると共に、その上端部に上方へ向って内外径がテーパ状に縮径するかしめ部34が形成されている。   The threaded shaft 18 of the connecting rod 12 is slightly smaller in diameter than the rod body 13, and a flange 22 having a larger diameter than the rod body 13 is integrated between the rod body 13 and the threaded shaft 18 in the connecting rod 12. Is formed. The lower surface side of the flange portion 22 is a tapered contact surface 23 that is inclined with respect to the axial direction. In the vibration isolator 10, a main body casing 24 formed in a substantially bottomed cylindrical shape is disposed on the outer peripheral side of the screw shaft 16. The main casing 24 is provided with a substantially cylindrical inner tube fitting 26 on the inner circumferential side thereof, and a substantially cylindrical outer tube fitting 28 is disposed on the outer circumferential side of the inner cylinder fitting 26. The inner cylindrical metal fitting 26 is formed with an annular flange 30 extending at the lower end portion thereof toward the inner peripheral side, and the outer cylindrical metal fitting 28 is also provided with an annular shape extending toward the inner peripheral side at the lower end portion thereof. The flange portion 32 is bent, and a caulking portion 34 whose inner and outer diameters are tapered downward is formed at the upper end portion thereof.

また本体ケーシング24には、内筒金具26と外筒金具28との間に形成される環状の空間内へ上端側から嵌挿されてフランジ部30,32へ当接する環状のボトムプレート36が設けられている。ボトムプレート36には、図2に示されるように、その中心部に内筒金具26の筒部27が挿通する円形の挿通穴38が穿設されると共に、この挿通穴38の外周側に下部連通穴40及び複数の流通開口42が穿設されている。下部連通穴40は略矩形状に形成されており、流通開口42は内周側から外周側へ向って開口幅が広がる略扇状に形成されている。   The main body casing 24 is provided with an annular bottom plate 36 that is inserted from an upper end side into an annular space formed between the inner cylinder fitting 26 and the outer cylinder fitting 28 and comes into contact with the flange portions 30 and 32. It has been. As shown in FIG. 2, the bottom plate 36 has a circular insertion hole 38 through which the cylindrical portion 27 of the inner cylindrical metal fitting 26 is inserted, and a lower portion on the outer peripheral side of the insertion hole 38. A communication hole 40 and a plurality of flow openings 42 are formed. The lower communication hole 40 is formed in a substantially rectangular shape, and the flow opening 42 is formed in a substantially fan shape whose opening width increases from the inner peripheral side toward the outer peripheral side.

図1に示されるように、防振装置10では、本体プレート14が本体ケーシング24の下側に配置されており、本体プレート14と本体ケーシング24との間には略円筒状に形成されたゴム弾性体44が配置されている。また本体プレート14には、中央部付近に軸方向へ貫通する略円筒状のストッパ受部46が一体的に形成されており、連結ロッド12は、ストッパ受部46の内周側を通って本体プレート14の上方及び下方へ突出している。ここで、ストッパ受部46は、その軸直角方向に沿った断面形状が本体プレート14の長手方向を短径方向(図1(B)の矢印DS方向)とする楕円形に形成されている。   As shown in FIG. 1, in the vibration isolator 10, the main body plate 14 is disposed below the main body casing 24, and the rubber formed between the main body plate 14 and the main body casing 24 is formed in a substantially cylindrical shape. An elastic body 44 is disposed. The main body plate 14 is integrally formed with a substantially cylindrical stopper receiving portion 46 penetrating in the axial direction in the vicinity of the center portion, and the connecting rod 12 passes through the inner peripheral side of the stopper receiving portion 46 and passes through the main body. Projecting upward and downward of the plate 14. Here, the stopper receiving portion 46 is formed in an elliptical shape in which the cross-sectional shape along the direction perpendicular to the axis has the longitudinal direction of the main body plate 14 as the minor diameter direction (the arrow DS direction in FIG. 1B).

ゴム弾性体44は、その上端面の外周側が外筒金具28のフランジ部32に加硫接着されると共に、上端面の内周側が内筒金具26のフランジ部30に加硫接着されている。またゴム弾性体44は、その下端部が本体プレート14の上面側に加硫接着されている。これにより、ゴム弾性体44は本体ケーシング24と本体プレート14とを弾性的に連結する。またゴム弾性体44には、本体プレート14のストッパ受部46の内周面及び外周面を被覆する被覆部48が一体的に形成されている。ここで、図1(B)に示されるように、ストッパ受部46の内周側を被覆する被覆部48は、短径方向(矢印DS方向)に沿った肉厚が薄く、長径方向(矢印DL方向)に沿った肉厚が厚くなっており、その内周面が軸心Sを中心として曲率半径一定の湾曲面により形成されている。   The rubber elastic body 44 has an outer peripheral side of its upper end surface vulcanized and bonded to the flange portion 32 of the outer cylinder fitting 28, and an inner peripheral side of the upper end surface is vulcanized and bonded to the flange portion 30 of the inner cylinder fitting 26. The lower end of the rubber elastic body 44 is vulcanized and bonded to the upper surface side of the main body plate 14. Thereby, the rubber elastic body 44 elastically connects the main body casing 24 and the main body plate 14. The rubber elastic body 44 is integrally formed with a covering portion 48 that covers the inner and outer peripheral surfaces of the stopper receiving portion 46 of the main body plate 14. Here, as shown in FIG. 1B, the covering portion 48 that covers the inner peripheral side of the stopper receiving portion 46 is thin along the short diameter direction (arrow DS direction), and the long diameter direction (arrow) The thickness along the (DL direction) is thick, and the inner peripheral surface is formed of a curved surface having a constant radius of curvature around the axis S.

図1に示されるように、ゴム弾性体44の上端面には、フランジ部30の外周端とフランジ部32の内周端との間に凹部50が形成されている。この凹部50は、その断面形状が径方向へ細長い略長方形とされており、軸心Sを中心とする周方向に沿って環状に延在している。凹部50の内部には、その上端側がボトムプレート36により閉止されることにより、外部から区画された環状の液室空間が形成され、この液室空間は、内部に水、エチレングリコール等の液体が充填されることにより、ゴム弾性体44の弾性変形に伴って内容積が拡縮する主液室52とされる。またゴム弾性体44には、その内周部に軸方向へ貫通する略円柱状の空洞部104が形成されている。この空洞部104は、本体ケーシング24の下端部から本体プレート14の上端面付近まで内径が徐々に広がる略円錐台状とされている。   As shown in FIG. 1, a recess 50 is formed on the upper end surface of the rubber elastic body 44 between the outer peripheral end of the flange portion 30 and the inner peripheral end of the flange portion 32. The recess 50 has a substantially rectangular cross-sectional shape that is elongated in the radial direction, and extends in a ring shape along the circumferential direction with the axis S as the center. Inside the recess 50, the upper end side is closed by the bottom plate 36, thereby forming an annular liquid chamber space partitioned from the outside. The liquid chamber space is filled with a liquid such as water or ethylene glycol. By being filled, the main liquid chamber 52 whose internal volume expands and contracts with the elastic deformation of the rubber elastic body 44 is formed. Further, the rubber elastic body 44 is formed with a substantially cylindrical hollow portion 104 penetrating in the axial direction on the inner peripheral portion thereof. The hollow portion 104 has a substantially truncated cone shape in which the inner diameter gradually increases from the lower end portion of the main body casing 24 to the vicinity of the upper end surface of the main body plate 14.

図2に示されるように、本体プレート14には、その外周側の部分に軸方向へ貫通する連結穴54が複数穿設されている。防振装置10では、本体プレート14の外周側の部分が車両における車体136F(図1参照)上に載置されると共に、複数の連結穴54をそれぞれ挿通したボルト等の締結部材(図示省略)により本体プレート14が車体136F上に締結固定される。また防振装置10では、図1に示されるように、連結ロッド12のネジ軸18がパワーユニットの一部を構成したギヤボックス130Gに設けられたネジ穴132Gに捻じ込まれることにより、連結ロッド12の下端部がギヤボックス130Gに連結される。ここで、ギヤボックス130Gにおけるネジ穴132Gの開口端の周縁部には、連結ロッド12の当接面23に対応する傾斜面からなる受面134Gが形成されており、この受面134Gに当接面23が圧接することにより、防振装置10がギヤボックス130Gに対する所定の取付位置へ自動的に位置決めされる。   As shown in FIG. 2, the main body plate 14 is provided with a plurality of connecting holes 54 penetrating in the axial direction in a portion on the outer peripheral side thereof. In the vibration isolator 10, the outer peripheral portion of the main body plate 14 is placed on a vehicle body 136F (see FIG. 1) in the vehicle, and fastening members such as bolts (not shown) that are inserted through the plurality of connecting holes 54, respectively. Thus, the main body plate 14 is fastened and fixed on the vehicle body 136F. Further, in the vibration isolator 10, as shown in FIG. 1, the screw shaft 18 of the connecting rod 12 is screwed into a screw hole 132G provided in the gear box 130G constituting a part of the power unit. Is connected to the gear box 130G. Here, a receiving surface 134G made of an inclined surface corresponding to the contact surface 23 of the connecting rod 12 is formed at the peripheral edge portion of the open end of the screw hole 132G in the gear box 130G, and contacts the receiving surface 134G. When the surface 23 is in pressure contact, the vibration isolator 10 is automatically positioned at a predetermined mounting position with respect to the gear box 130G.

図1に示されるように、本体ケーシング24内には、ボトムプレート36の上側にリング状の底蓋部材56及びオリフィス部材64が軸方向に沿って積層された状態で収納されている。図2に示されるように、底蓋部材56は全体として厚さ一定の円板状に形成されており、その外径がボトムプレート36の外径と略一致している。底蓋部材56には、その中央部に内筒金具26の筒部27が挿通する円形の挿通穴58が穿設されると共に、挿通穴58の外周側に中間連通穴60及び複数の下部開口62が穿設されている。   As shown in FIG. 1, a ring-shaped bottom cover member 56 and an orifice member 64 are accommodated in the main body casing 24 along the axial direction above the bottom plate 36. As shown in FIG. 2, the bottom cover member 56 is formed in a disk shape having a constant thickness as a whole, and the outer diameter thereof substantially coincides with the outer diameter of the bottom plate 36. The bottom cover member 56 is provided with a circular insertion hole 58 through which the cylinder portion 27 of the inner cylinder fitting 26 is inserted at the center thereof, and an intermediate communication hole 60 and a plurality of lower openings on the outer peripheral side of the insertion hole 58. 62 is formed.

ここで、中間連通穴60は略矩形状に形成されており、ボトムプレート36の下部連通穴40に面するように配置されている。また複数の下部開口62はそれぞれ周方向へ細長いスリット状に形成されており、底蓋部材56には、周方向に沿って複数の下部開口62が配列されると共に、径方向に沿って外周側及び内周側にそれぞれ下部開口62が配置されている。防振装置10では、底蓋部材56の径方向に沿って配置された一対の下部開口62がボトムプレート36における1個の流通開口42に面するように配置されている。   Here, the intermediate communication hole 60 is formed in a substantially rectangular shape, and is disposed so as to face the lower communication hole 40 of the bottom plate 36. The plurality of lower openings 62 are each formed in a slit shape that is elongated in the circumferential direction, and the bottom cover member 56 has a plurality of lower openings 62 arranged along the circumferential direction and an outer peripheral side along the radial direction. And the lower opening 62 is arrange | positioned at the inner peripheral side, respectively. In the vibration isolator 10, the pair of lower openings 62 arranged along the radial direction of the bottom cover member 56 are arranged so as to face one flow opening 42 in the bottom plate 36.

オリフィス部材64は、その上端側が円板状の頂板部66により閉止された底の浅い略有底円筒状に形成に形成されており、その外径が底蓋部材56の外径と略一致している。オリフィス部材64には、図3に示されるように、頂板部66の中央部に円筒状の挿通部68が下方へ突出するように形成されており、この挿通部68内には、内筒金具26の筒部27が挿通している。またオリフィス部材64には、頂板部66における挿通部68の外周側に複数の上部開口70が穿設されている。ここで、複数の上部開口70は底蓋部材56における下部開口62と略同一の形状及び配置とされている。またオリフィス部材64には、その頂板部66の外周側に下方へ向って開いた略コ字状に屈曲された樋状部72が一体的に形成されている。   The orifice member 64 is formed in a shallow bottomed substantially cylindrical shape whose upper end side is closed by a disc-shaped top plate portion 66, and the outer diameter thereof substantially coincides with the outer diameter of the bottom cover member 56. ing. As shown in FIG. 3, the orifice member 64 is formed with a cylindrical insertion portion 68 projecting downward from the center portion of the top plate portion 66. 26 cylindrical portions 27 are inserted therethrough. The orifice member 64 is formed with a plurality of upper openings 70 on the outer peripheral side of the insertion portion 68 in the top plate portion 66. Here, the plurality of upper openings 70 have substantially the same shape and arrangement as the lower openings 62 in the bottom lid member 56. The orifice member 64 is integrally formed with a hook-like portion 72 bent in a substantially U-shape that opens downward on the outer peripheral side of the top plate portion 66.

図3に示されるように、オリフィス部材64には、挿通部68の外周面から樋状部72まで延出する閉塞部74が形成されており、閉塞部74、挿通部68及び樋状部72は、それぞれの下端面が同一平面上に位置している。この閉塞部74には、外周側が樋状部72内へ面して開口した略矩形状の流通凹部78が形成されており、この流通凹部78は底蓋部材56の中間連通穴60に面するように配置されている。またオリフィス部材64には、樋状部72内を径方向に沿って横断する閉塞部74が形成されており、この閉塞部74の下端面は樋状部72の下端面と同一平面上に位置している。樋状部72には、周方向に沿って閉塞部74から所定距離、離れた部位に矩形状の上部連通穴80が穿設されている。   As shown in FIG. 3, the orifice member 64 is formed with a blocking portion 74 that extends from the outer peripheral surface of the insertion portion 68 to the hook-shaped portion 72. The blocking portion 74, the insertion portion 68, and the hook-shaped portion 72 are formed. Each lower end surface is located on the same plane. The closed portion 74 is formed with a substantially rectangular flow recess 78 having an outer peripheral side facing the inside of the bowl-shaped portion 72, and the flow recess 78 faces the intermediate communication hole 60 of the bottom cover member 56. Are arranged as follows. The orifice member 64 is formed with a closed portion 74 that crosses the inside of the bowl-shaped portion 72 along the radial direction. The lower end surface of the closed portion 74 is located on the same plane as the lower end surface of the bowl-shaped portion 72. is doing. A rectangular upper communication hole 80 is bored in the flange 72 at a position away from the blocking portion 74 by a predetermined distance along the circumferential direction.

図1に示されるように、防振装置10では、オリフィス部材64の下端側が底蓋部材56により閉止されることにより、底蓋部材56とオリフィス部材64の頂板部66との間に軸方向へ扁平な空間である収納室82が形成されると共に、樋状部72内に周方向へ延在する細長い空間が形成され、この空間は主液室52と同一の液体が充填されてオリフィス通路84とされる。ここで、収納室82は、軸心Sを中心とする周方向に沿ってC字状に延在しており、その両端部が閉塞部76により閉塞されている。またオリフィス通路84も、軸心Sを中心とする周方向に沿ってC字状に延在しており、その両端部が閉塞部78により閉塞されている。このオリフィス通路84は、その路長及び断面積、すなわち液体の流通抵抗が、例えば、シェイク振動に適合するように設定(チューニング)されている。   As shown in FIG. 1, in the vibration isolator 10, the lower end side of the orifice member 64 is closed by the bottom cover member 56, so that the axial direction is formed between the bottom cover member 56 and the top plate portion 66 of the orifice member 64. A storage chamber 82 that is a flat space is formed, and an elongated space that extends in the circumferential direction is formed in the bowl-shaped portion 72. This space is filled with the same liquid as the main liquid chamber 52, and the orifice passage 84. It is said. Here, the storage chamber 82 extends in a C shape along the circumferential direction around the axis S, and both ends thereof are closed by the closing portions 76. The orifice passage 84 also extends in a C shape along the circumferential direction centered on the axis S, and both ends thereof are closed by the closing portions 78. The orifice passage 84 is set (tuned) so that its path length and cross-sectional area, that is, the flow resistance of the liquid is adapted to, for example, shake vibration.

防振装置10では、収納室82内にゴム製の可動メンブラン86が配置されている。可動メンブラン86は、図2に示されるように、所定の厚さを有するゴムプレートにより内径及び外径が一定の略C字状に形成されており、その周方向における閉塞部76に対応する部分が扇状に切り欠かれている。可動メンブラン86は、その内径が挿通部68の外径よりも若干大径とされると共に、外径が樋状部72の内径よりも若干小径とされている。また可動メンブラン86は、その厚さが収納室82の軸方向に沿った寸法に対して所定の寸法だけ薄くなっている。これにより、可動メンブラン86は、収納室82内で可動メンブラン86と収納室82の軸方向に沿った寸法との差と略一致する範囲で軸方向に沿って移動(振動)可能になる。   In the vibration isolator 10, a rubber movable membrane 86 is disposed in the storage chamber 82. As shown in FIG. 2, the movable membrane 86 is formed in a substantially C shape having a constant inner diameter and outer diameter by a rubber plate having a predetermined thickness, and corresponds to the closed portion 76 in the circumferential direction. Is cut out in a fan shape. The movable membrane 86 has an inner diameter that is slightly larger than the outer diameter of the insertion portion 68 and an outer diameter that is slightly smaller than the inner diameter of the bowl-shaped portion 72. Further, the movable membrane 86 is thinner by a predetermined dimension than the dimension along the axial direction of the storage chamber 82. As a result, the movable membrane 86 can move (vibrate) along the axial direction within the storage chamber 82 within a range that substantially matches the difference between the movable membrane 86 and the dimension along the axial direction of the storage chamber 82.

ここで、可動メンブラン86の厚さと収納室82の軸方向に沿った寸法との差は、例えば、車両の走行時に発生する低周波域(例えば、8〜12Hz)の振動であるシェイク振動の振幅(例えば、0.5mm〜1mm程度)に対応して設定される。   Here, the difference between the thickness of the movable membrane 86 and the dimension along the axial direction of the storage chamber 82 is, for example, the amplitude of shake vibration, which is vibration in a low frequency region (for example, 8 to 12 Hz) that occurs when the vehicle travels. (For example, about 0.5 mm to 1 mm).

図1に示されるように、防振装置10には、外筒金具28の内周側であってオリフィス部材64の上側に薄肉円筒状の連結金具88が嵌挿されている。この連結金具88は、防振装置10の組立時に外筒金具28のかしめ部34がテーパ状にかしめられることにより、かしめ部34により軸方向への移動が拘束されて外筒金具28内で固定される。   As shown in FIG. 1, in the vibration isolator 10, a thin cylindrical connecting fitting 88 is fitted on the inner peripheral side of the outer cylindrical fitting 28 and above the orifice member 64. When the vibration isolator 10 is assembled, the connecting metal 88 is fixed in the outer cylinder 28 by restraining movement in the axial direction by the caulking part 34 by the caulking part 34 of the outer cylinder 28 being tapered. Is done.

防振装置10には、内筒金具26の外周側であってボトムプレート36及びオリフィス部材64の上側に略肉厚円筒状の連結リング90が嵌挿されると共に、連結ロッド12のネジ軸16に捻じ込まれる固定ナット92が設けられている。防振装置10では、固定ナット92が連結リング90の上端面に圧接するまでネジ軸16に捻じ込まれ、これにより、連結リング90がボトムプレート36及びオリフィス部材64と固定ナット92との間に固定される。またボトムプレート36、底蓋部材56及びオリフィス部材64は、軸方向に沿ってゴム弾性体44と連結金具88及び連結リング90により挟持されることにより、軸方向への移動が拘束されて本体ケーシング24内で固定される。   In the vibration isolator 10, a substantially cylindrical connecting ring 90 is fitted on the outer peripheral side of the inner cylindrical metal fitting 26 and above the bottom plate 36 and the orifice member 64, and is attached to the screw shaft 16 of the connecting rod 12. A fixing nut 92 to be screwed is provided. In the vibration isolator 10, the fixing nut 92 is screwed into the screw shaft 16 until it presses against the upper end surface of the connecting ring 90, whereby the connecting ring 90 is interposed between the bottom plate 36 and the orifice member 64 and the fixing nut 92. Fixed. Further, the bottom plate 36, the bottom cover member 56, and the orifice member 64 are clamped by the rubber elastic body 44, the connection fitting 88, and the connection ring 90 along the axial direction, so that the movement in the axial direction is restricted and the main body casing. 24 is fixed.

図1に示されるように、防振装置10には、連結金具88と連結リング90との間に掛け渡された環状のダイヤフラム94が設けられている。このダイヤフラム94は、例えば、耐オゾン性に優れたNR/EPDM系のゴム材料により薄膜状に形成されており、その外周部が連結金具88の内周側に全周に亘って加硫接着されると共に、内周部が連結リング90の内周側に全周に亘って加硫接着されている。これにより、連結金具88と連結リング90との間がダイヤフラム94により閉塞される。ダイヤフラム94は、連結金具88と連結リング90との間で軸方向に沿って膨出するように弛んだ状態とされており、比較的小さい荷重(液圧)により軸方向へ変形可能になっている。   As shown in FIG. 1, the vibration isolator 10 is provided with an annular diaphragm 94 that is stretched between a connection fitting 88 and a connection ring 90. The diaphragm 94 is formed in a thin film shape from, for example, an NR / EPDM rubber material excellent in ozone resistance, and the outer peripheral portion thereof is vulcanized and bonded to the inner peripheral side of the connection fitting 88 over the entire periphery. In addition, the inner peripheral portion is vulcanized and bonded to the inner peripheral side of the connecting ring 90 over the entire periphery. Thus, the diaphragm 94 closes the space between the connection fitting 88 and the connection ring 90. The diaphragm 94 is slackened so as to bulge in the axial direction between the connection fitting 88 and the connection ring 90, and can be deformed in the axial direction by a relatively small load (hydraulic pressure). Yes.

防振装置10では、本体ケーシング24内におけるオリフィス部材64とダイヤフラム94との間に外部から区画された環状の液室空間が形成され、この液室空間は、内部に主液室52と同一の液体が充填されることにより、ダイヤフラム94の変形により内容積が拡縮可能とされた副液室95とされる。主液室52と副液室95とは、ボトムプレート36の下部連通穴40、底蓋部材56の中間連通穴60、オリフィス通路84及びオリフィス部材64の上部連通穴80を通して互いに連通している。   In the vibration isolator 10, an annular liquid chamber space partitioned from the outside is formed between the orifice member 64 and the diaphragm 94 in the main body casing 24, and this liquid chamber space is the same as the main liquid chamber 52 inside. By filling the liquid, a sub liquid chamber 95 whose inner volume can be expanded and contracted by deformation of the diaphragm 94 is formed. The main liquid chamber 52 and the sub liquid chamber 95 communicate with each other through the lower communication hole 40 of the bottom plate 36, the intermediate communication hole 60 of the bottom cover member 56, the orifice passage 84, and the upper communication hole 80 of the orifice member 64.

図1に示されるように、防振装置10には、連結ロッド12のロッド本体13の外周側に嵌挿固定される環状のストッパ部材96が設けられている。ストッパ部材96には、その内周側に薄肉円筒状の金属スリーブ102が設けられると共に、この金属スリーブ102の外周側に肉厚円筒状のストッパゴム98が配置されている。金属スリーブ102は、ロッド本体13の外周側に嵌挿されて鍔部22の上端部に当接した状態で固定されている。   As shown in FIG. 1, the vibration isolator 10 is provided with an annular stopper member 96 that is fitted and fixed to the outer peripheral side of the rod body 13 of the connecting rod 12. The stopper member 96 is provided with a thin cylindrical metal sleeve 102 on its inner peripheral side, and a thick cylindrical stopper rubber 98 is disposed on the outer peripheral side of the metal sleeve 102. The metal sleeve 102 is fixed in a state where the metal sleeve 102 is fitted on the outer peripheral side of the rod body 13 and is in contact with the upper end portion of the flange portion 22.

ストッパゴム98は、その外周面がストッパ面100とされており、内周面が加硫接着により金属スリーブ102の外周面に固着されている。これにより、ストッパゴム98は、ストッパ面100が被覆部48を介して本体プレート14のストッパ受部46の内周面に対向するように支持される。またストッパゴム98は、ゴム弾性体44とは異なる種類のゴム材料により形成されている。   The outer peripheral surface of the stopper rubber 98 is a stopper surface 100, and the inner peripheral surface is fixed to the outer peripheral surface of the metal sleeve 102 by vulcanization adhesion. Accordingly, the stopper rubber 98 is supported so that the stopper surface 100 faces the inner peripheral surface of the stopper receiving portion 46 of the main body plate 14 via the covering portion 48. The stopper rubber 98 is made of a rubber material different from the rubber elastic body 44.

具体的には、ゴム弾性体44は、シェイク振動等の低周波域の振動に対する制振性を良好とするため、NR/SBR系ゴム等の高減衰のゴム材料により形成されており、一方、ストッパゴム98は、高周波域の振動入力時における防振性を良好とするため、NR系ゴム等の動倍率が低いゴム材料により形成されている。但し、防振装置10では、低周波域の振動入力時には、オリフィス通路84を流通する液体に生じる共振現象(液体共振)により低周波域の振動に対する減衰を発生できるので、ゴム弾性体44についても動倍率が低いゴム材料により形成するようにしても良い。   Specifically, the rubber elastic body 44 is formed of a highly damped rubber material such as NR / SBR rubber in order to improve vibration damping properties against vibrations in a low frequency region such as shake vibration, The stopper rubber 98 is made of a rubber material having a low dynamic magnification, such as NR rubber, in order to improve the vibration proofing property at the time of vibration input in a high frequency range. However, the vibration isolator 10 can generate a damping for the vibration in the low frequency region by the resonance phenomenon (liquid resonance) generated in the liquid flowing through the orifice passage 84 when the vibration in the low frequency region is input. You may make it form with a rubber material with a low dynamic magnification.

ここで、ストッパゴム98は、その軸方向に沿った厚さが本体プレート14のストッパ受部46の幅よりも若干薄くなっており、外径がストッパ受部46を被覆した被覆部48の最小内径(短径)よりも所定の長さだけ短くなっている。これにより、図1(B)に示されるように、被覆部48の内周面とストッパ面100との間には、周方向に沿った任意の位置で径方向に沿った幅が周方向に沿った任意の位置で略一定の隙間が形成される。   Here, the thickness of the stopper rubber 98 along the axial direction is slightly smaller than the width of the stopper receiving portion 46 of the main body plate 14, and the outer diameter is the minimum of the covering portion 48 covering the stopper receiving portion 46. It is shorter than the inner diameter (minor axis) by a predetermined length. Thereby, as shown in FIG. 1 (B), the width along the radial direction between the inner peripheral surface of the covering portion 48 and the stopper surface 100 is in the circumferential direction at an arbitrary position along the circumferential direction. A substantially constant gap is formed at any position along.

次に、上記のように構成された本発明の第1の実施形態に係る防振装置10の動作及び作用について説明する。防振装置10では、ギヤボックス130G側からからの振動入力時に、この振動により吸振主体であるゴム弾性体44が弾性変形する。これにより、ゴム弾性体44によって入力振動が減衰吸収される。このとき、入力振動が軸方向に沿って振幅する縦振動であっても、軸直角方向に沿って振幅する横振動の何れであっても、振動入力時にゴム弾性体44が弾性変形することにより入力振動が減衰吸収される。   Next, the operation and action of the vibration isolator 10 according to the first embodiment of the present invention configured as described above will be described. In the vibration isolator 10, when vibration is input from the gear box 130G side, the rubber elastic body 44, which is the main vibration absorber, is elastically deformed by the vibration. Thus, the input vibration is attenuated and absorbed by the rubber elastic body 44. At this time, the rubber elastic body 44 is elastically deformed at the time of vibration input, regardless of whether the input vibration is a longitudinal vibration that swings along the axial direction or a lateral vibration that swings along the direction perpendicular to the axis. Input vibration is damped and absorbed.

また防振装置10では、ギヤボックス130Gからの振動入力時に、この振動入力に同期してゴム弾性体44が弾性変形すると、主液室52の内容積が拡縮すると共に主液室52内の液圧が変化する。この液圧変化に伴って、オリフィス通路84を通して主液室52と副液室95との間に液体が相互に流通すると共に、下部開口62を通して主液室52に連通した収納室82内に収納された可動メンブラン86には、入力振動に同期して周期的に変化する液圧(圧力波)が作用し、この圧力波を受けた可動メンブラン86は、収納室82内で軸方向に沿って可動メンブラン86と収納室82との寸法差と一致する可動範囲内で往復移動(振動)する。これにより、可動メンブラン86の上面部及び下面部が底蓋部材56及びオリフィス部材64の頂板部66に対して当接及び離間する動作を繰り返し、底蓋部材56への当接時には下部開口62を閉塞し、また頂板部66への当接時には上部開口70を閉塞する。   Further, in the vibration isolator 10, when the rubber elastic body 44 is elastically deformed in synchronization with the vibration input at the time of vibration input from the gear box 130G, the internal volume of the main liquid chamber 52 is expanded and contracted and the liquid in the main liquid chamber 52 is expanded. The pressure changes. Along with this change in liquid pressure, liquid flows between the main liquid chamber 52 and the sub liquid chamber 95 through the orifice passage 84 and is stored in the storage chamber 82 that communicates with the main liquid chamber 52 through the lower opening 62. The movable membrane 86 is subjected to a hydraulic pressure (pressure wave) that periodically changes in synchronization with the input vibration, and the movable membrane 86 that has received the pressure wave is axially moved inside the storage chamber 82. It reciprocates (vibrates) within a movable range that matches the dimensional difference between the movable membrane 86 and the storage chamber 82. As a result, the upper and lower surfaces of the movable membrane 86 are repeatedly brought into and out of contact with the bottom lid member 56 and the top plate portion 66 of the orifice member 64. When the movable membrane 86 abuts the bottom lid member 56, the lower opening 62 is opened. In addition, the upper opening 70 is closed when contacting the top plate portion 66.

また防振装置10では、振動入力時に副液室95内の液圧に対して主液室52内の液圧が相対的に上昇すると、可動メンブラン86が主液室52の液圧(正圧)を受けることにより、可動メンブラン86が上方へ移動し、また振動入力時に副液室95内の液圧に対して主液室52内の液圧が相対的に低下すると、可動メンブラン86が主液室52の液圧(負圧)を受けることにより、可動メンブラン86が下方へ移動する。   Further, in the vibration isolator 10, when the liquid pressure in the main liquid chamber 52 rises relative to the liquid pressure in the sub liquid chamber 95 at the time of vibration input, the movable membrane 86 moves the liquid pressure (positive pressure) in the main liquid chamber 52. ), The movable membrane 86 moves upward, and when the fluid pressure in the main fluid chamber 52 is lowered relative to the fluid pressure in the sub fluid chamber 95 at the time of vibration input, the movable membrane 86 becomes main. By receiving the liquid pressure (negative pressure) in the liquid chamber 52, the movable membrane 86 moves downward.

防振装置10では、入力振動の周波数がシェイク振動の周波数(例えば、8〜12Hz)以下で、その振幅が大きい場合(例えば、0.5mm〜1mm程度の場合)には、主液室52の液圧変化の方向が変化(上昇から低下、又は低下から上昇へ変化)した直後に、可動メンブラン86が底蓋部材56及び頂板部66一方に当接し、収納室82を通った主液室52と副液室95との間の液体流通が実質的に阻止される。   In the vibration isolator 10, when the frequency of the input vibration is equal to or lower than the frequency of the shake vibration (for example, 8 to 12 Hz) and the amplitude is large (for example, about 0.5 mm to 1 mm), the main liquid chamber 52 Immediately after the direction of the change in hydraulic pressure is changed (from rising to lowering or from lowering to rising), the movable membrane 86 comes into contact with one of the bottom lid member 56 and the top plate portion 66 and passes through the storage chamber 82. And the liquid flow between the secondary liquid chamber 95 are substantially prevented.

従って、防振装置10では、シェイク振動の入力時に、収納室82内を通って液体が主液室52と副液室95との間を実質的に流通することがなくなり、オリフィス通路84のみを通して主液室52と副液室95との間で液体が相互に流通する。この結果、防振装置10では、入力振動が特にシェイク振動の場合には、オリフィス通路84を流通する液体に共振現象(液体共振)が生じ、この液体共振の作用によって入力振動(シェイク振動)を特に効果的に減衰できる。   Therefore, in the vibration isolator 10, when shake vibration is input, the liquid does not substantially flow between the main liquid chamber 52 and the sub liquid chamber 95 through the storage chamber 82, and only through the orifice passage 84. Liquid flows between the main liquid chamber 52 and the sub liquid chamber 95. As a result, in the vibration isolator 10, when the input vibration is particularly shake vibration, a resonance phenomenon (liquid resonance) occurs in the liquid flowing through the orifice passage 84, and the input vibration (shake vibration) is generated by the action of the liquid resonance. It can be attenuated particularly effectively.

また防振装置10では、入力振動の周波数がシェイク振動の周波数よりも高く、その振幅が小さい場合、例えば、入力振動がアイドル振動(例えば、20〜30Hz)で、その振幅が0.1mm〜0.2mm程度の場合には、シェイク振動に適合するようにチューニングされたオリフィス通路84が目詰まり状態となり、オリフィス通路84には液体が流れ難くなる。   In the vibration isolator 10, when the frequency of the input vibration is higher than the frequency of the shake vibration and the amplitude is small, for example, the input vibration is idle vibration (for example, 20 to 30 Hz) and the amplitude is 0.1 mm to 0. In the case of about 2 mm, the orifice passage 84 tuned to match the shake vibration is clogged, and the liquid hardly flows into the orifice passage 84.

このとき、防振装置10では、主液室52の周期的な液圧変化に伴って可動メンブラン86が収納室82内で軸方向に沿って振動するが、その振幅が可動メンブラン86と収納室82の寸法差よりも小さくなることから、底蓋部材56及び頂板部66の何れにも完全な面接触状態で当接することがなくなり、底蓋部材56の下部開口62及び頂板部66の上部開口70の双方がそれぞれ可動メンブラン86により制限的に開放された状態に維持される。   At this time, in the vibration isolator 10, the movable membrane 86 vibrates along the axial direction in the storage chamber 82 as the hydraulic pressure of the main fluid chamber 52 changes periodically. Therefore, the bottom cover member 56 and the top plate portion 66 are not brought into contact with each other in a completely surface contact state, and the lower opening 62 of the bottom cover member 56 and the upper opening of the top plate portion 66 are not contacted. Both of them are maintained in a state of being limitedly opened by the movable membrane 86.

従って、防振装置10では、アイドル振動等の高周波域振動の入力時には、オリフィス通路84が目詰まり状態となり、オリフィス通路84には液体が流れ難くなるが、主液室52内の液圧上昇が抑制されるように、収納室82を通って主液室52内の液体が副液室95へ流出することから、主液室52内の液圧上昇に起因する装置のばね定数の上昇を抑えることができ、このような高周波域振動の入力時もゴム弾性体44の動ばね定数を低く維持し、このゴム弾性体44の弾性変形により高周波振動も効果的に吸収できる。   Therefore, in the vibration isolator 10, when high frequency vibration such as idle vibration is input, the orifice passage 84 becomes clogged and it is difficult for liquid to flow into the orifice passage 84, but the liquid pressure in the main liquid chamber 52 increases. Since the liquid in the main liquid chamber 52 flows out to the sub liquid chamber 95 through the storage chamber 82 so as to be suppressed, an increase in the spring constant of the apparatus due to an increase in the liquid pressure in the main liquid chamber 52 is suppressed. Therefore, the dynamic spring constant of the rubber elastic body 44 can be kept low even when such high-frequency vibration is input, and high-frequency vibration can be effectively absorbed by the elastic deformation of the rubber elastic body 44.

なお、防振装置10では、可動メンブラン86により高周波振動の入力時にゴム弾性体44の動ばね定数の上昇を効果的に抑制できるが、可動メンブラン86が入力振動に同期して底板部材56及び頂板部66に衝突することにより、打音が発生する。このような弾音が高周波振動の入力時に動ばね定数の上昇よりも重要な問題となる場合には、図5に示されるように、オリフィス部材64に設けられていた収納室82を省略すると共に、収納室82内への可動メンブラン86の配置を止めるようにしても良い。これにより、図5に示される防振装置10によれば、図1に示されるものと比較し、可動メンブラン86の振動時の打音発生がなくなると共に、装置の構造を簡略化できる。   In the vibration isolator 10, the movable membrane 86 can effectively suppress an increase in the dynamic spring constant of the rubber elastic body 44 when high-frequency vibration is input. However, the movable membrane 86 synchronizes with the input vibration and the bottom plate member 56 and the top plate. A hitting sound is generated by colliding with the portion 66. In the case where such a bullet sound is more important than the increase of the dynamic spring constant when high frequency vibration is input, the storage chamber 82 provided in the orifice member 64 is omitted as shown in FIG. The arrangement of the movable membrane 86 in the storage chamber 82 may be stopped. Thereby, according to the vibration isolator 10 shown in FIG. 5, compared to the case shown in FIG. 1, the generation of a hitting sound when the movable membrane 86 vibrates is eliminated, and the structure of the device can be simplified.

また本実施形態に係る防振装置10では、ゴム弾性体44の中央部に連結ロッド12が貫通する空洞部104を形成し、この空洞部104内にストッパゴム98を配置すると共に、ストッパゴム98を連結ロッド12のロッド本体13の外周側に固定して、本体プレート14のストッパ受部46の内周面へ所定の隙間を空けて対向させたことにより、軸直角方向(車両の前後方向又は左右方向)に沿った荷重が連結ロッド12を介して装置に入力すると、ゴム弾性体44にこじり方向に沿った弾性変形が生じると共に、本体ケーシング24との連結部を中心として連結ロッド12が揺動しつつ軸直角方向に沿って変位する。   Further, in the vibration isolator 10 according to the present embodiment, the hollow portion 104 through which the connecting rod 12 passes is formed in the central portion of the rubber elastic body 44, and the stopper rubber 98 is disposed in the hollow portion 104 and the stopper rubber 98. Is fixed to the outer peripheral side of the rod main body 13 of the connecting rod 12 and is opposed to the inner peripheral surface of the stopper receiving portion 46 of the main body plate 14 with a predetermined gap therebetween, whereby the direction perpendicular to the axis (the longitudinal direction of the vehicle or When a load along the left and right direction is input to the apparatus via the connecting rod 12, the elastic elastic body 44 undergoes elastic deformation along the twisting direction, and the connecting rod 12 swings around the connecting portion with the main body casing 24. Displacement along the direction perpendicular to the axis while moving.

このとき、入力荷重が小さく連結ロッド12の軸直角方向に沿った変位量がストッパゴム98の外周面と被覆部48の内周面との隙間よりも小さい場合には、連結部材の軸直角方向に沿った変位がストッパ受部46により制限されることなく、荷重入力に伴って生じる連結ロッド12の軸直角方向に沿った変位(振動)がゴム弾性体44の弾性変形により徐々に減衰吸収される。   At this time, when the input load is small and the amount of displacement along the direction perpendicular to the axis of the connecting rod 12 is smaller than the gap between the outer peripheral surface of the stopper rubber 98 and the inner peripheral surface of the covering portion 48, the direction perpendicular to the axis of the connecting member. The displacement (vibration) along the direction perpendicular to the axis of the connecting rod 12 caused by the load input is gradually attenuated and absorbed by the elastic deformation of the rubber elastic body 44 without being limited by the stopper receiving portion 46. The

また入力荷重が大きく、連結ロッド12にストッパゴム98の外周面と被覆部48の内周面と隙間よりも大きな変位が生じると、ストッパゴム98が被覆部48へ圧接すると共に、ストッパゴム98及び被覆部48が弾性変形(圧縮変形)する。これらストッパゴム98及び被覆部48の弾性的な変形抵抗により連結ロッド12の軸直角方向に沿った変位が制限されると共に、ストッパゴム98及び被覆部48により連結ロッド12と本体プレート14との間の振動伝達が抑制される。   If the input load is large and the connecting rod 12 is displaced larger than the gap between the outer peripheral surface of the stopper rubber 98 and the inner peripheral surface of the covering portion 48, the stopper rubber 98 is pressed against the covering portion 48, and the stopper rubber 98 and The covering 48 is elastically deformed (compressed). The elastic deformation resistance of the stopper rubber 98 and the covering portion 48 limits the displacement of the connecting rod 12 along the direction perpendicular to the axis, and the stopper rubber 98 and the covering portion 48 prevent the connecting rod 12 and the main body plate 14 from being connected. Vibration transmission is suppressed.

また防振装置10では、ゴム弾性体44の空洞部104及び本体プレート14の内周側を連結ロッド12が貫通すると共に、連結ロッド12のロッド本体13の外周側に固定されたストッパゴム98がゴム弾性体44の空洞部104内に配置されていることから、連結ロッド12の軸方向に沿ってゴム弾性体44と重なって配置されるロッド本体13を装置内部に収納した状態にでき、この連結ロッド12のロッド本体13に固定されたストッパ部材96によりストッパ機構を構成できるので、装置の軸方向に沿った寸法増加を抑制しつつ、連結ロッド12の軸方向に沿った寸法を長くすることができると共に、連結ロッド12の軸直角方向に沿った過大な変位を防止するためのストッパ機構により装置の軸方向に沿った寸法が拡大することも防止できる。   In the vibration isolator 10, the connecting rod 12 penetrates the cavity 104 of the rubber elastic body 44 and the inner peripheral side of the main body plate 14, and a stopper rubber 98 fixed to the outer peripheral side of the rod main body 13 of the connecting rod 12. Since it is disposed in the cavity 104 of the rubber elastic body 44, the rod main body 13 that is disposed so as to overlap the rubber elastic body 44 along the axial direction of the connecting rod 12 can be stored in the apparatus. Since the stopper mechanism can be configured by the stopper member 96 fixed to the rod body 13 of the connecting rod 12, the dimension along the axial direction of the connecting rod 12 is lengthened while suppressing an increase in the dimension along the axial direction of the apparatus. And the dimension along the axial direction of the device is enlarged by a stopper mechanism for preventing excessive displacement along the direction perpendicular to the axis of the connecting rod 12. It can be prevented.

また防振装置10では、ストッパ受部46の短径方向に沿った被覆部48の肉厚が相対的に薄くされ、ストッパ受部46の長径方向に沿った被覆部48の肉厚が相対的に厚くされている。これにより、例えば、ストッパ受部46の長径方向が車両の前後方向と実質的に一致し、かつストッパ受部46の短径方向が車両の左右方向と実質的に一致するように、防振装置10をギヤボックス130Gと車体136Fとの間に配置すれば、連結ロッド12に車両の前後方向に沿ってストッパゴム98の外周面と被覆部48の内周面と隙間よりも大きな変位が生じた際における、連結ロッド12の変位量の増加に対するばね定数の増加を相対的に小さいものにでき、かつ連結ロッド12に車両の左右方向に沿ってストッパゴム98の外周面と被覆部48の内周面と隙間よりも大きな変位が生じた際における、連結ロッド12の変位量の増加に対するばね定数の増加を相対的に大きなものにできる。   In the vibration isolator 10, the thickness of the covering portion 48 along the minor axis direction of the stopper receiving portion 46 is relatively thin, and the thickness of the covering portion 48 along the major axis direction of the stopper receiving portion 46 is relatively small. Has been thickened. Accordingly, for example, the vibration isolator is configured so that the major axis direction of the stopper receiving portion 46 substantially coincides with the longitudinal direction of the vehicle and the minor axis direction of the stopper receiving portion 46 substantially coincides with the left and right direction of the vehicle. 10 is disposed between the gear box 130G and the vehicle body 136F, the connecting rod 12 is displaced in the longitudinal direction of the vehicle larger than the clearance between the outer peripheral surface of the stopper rubber 98 and the inner peripheral surface of the covering portion 48. In this case, the increase in the spring constant with respect to the increase in the displacement amount of the connecting rod 12 can be made relatively small, and the outer peripheral surface of the stopper rubber 98 and the inner periphery of the covering portion 48 along the left-right direction of the vehicle. When a displacement larger than the surface and the gap occurs, the increase of the spring constant with respect to the increase of the displacement amount of the connecting rod 12 can be made relatively large.

この結果、乗り心地に対する影響が大きい前後方向の振動をストッパゴム98及び被覆部48により効果的に防振でき、かつ操縦安定性に対する影響が大きいギヤボックス130Gの左右方向に沿った変位を効果的に抑制できる。   As a result, the vibration in the front-rear direction that has a great influence on the ride comfort can be effectively prevented by the stopper rubber 98 and the covering portion 48, and the displacement along the left-right direction of the gear box 130G that has a great influence on the steering stability is effectively reduced. Can be suppressed.

なお、本実施形態では、ストッパ受部46内周面の軸直角方向に沿った形状を非円形に形成すると共に、被覆部48の肉厚を長径方向と短径方向とで異なるものとしたが、ストッパゴム98の肉厚を長径方向と短径方向とで異なるものとし、又は被覆部48及びストッパゴム98の肉厚を長径方向と短径方向とでそれぞれ異なるものとしても、上記した効果と同様な効果を得られる。   In the present embodiment, the shape along the axis perpendicular direction of the inner peripheral surface of the stopper receiving portion 46 is formed in a non-circular shape, and the thickness of the covering portion 48 is different in the major axis direction and the minor axis direction. Even if the thickness of the stopper rubber 98 is different in the major axis direction and the minor axis direction, or the thickness of the covering portion 48 and the stopper rubber 98 is different in the major axis direction and the minor axis direction, Similar effects can be obtained.

また防振装置10では、主液室52、副液室95及びオリフィス通路84をそれぞれ連結ロッド12の外周側に配置したことにより、主液室52、副液室95及びオリフィス通路84を設けても、装置の軸方向に沿った寸法が拡大することを防止できる。   Further, in the vibration isolator 10, the main liquid chamber 52, the sub liquid chamber 95 and the orifice passage 84 are provided by disposing the main liquid chamber 52, the sub liquid chamber 95 and the orifice passage 84 on the outer peripheral side of the connecting rod 12, respectively. Moreover, it can prevent that the dimension along the axial direction of an apparatus expands.

(第2の実施形態)
図4には本発明の第2の実施形態に係る防振装置が示されている。この防振装置110は、第1の実施形態に係る防振装置10と同様に、自動車等の車両における振動発生部であるエンジン及びギヤボックスを含むパワーユニットを振動受部である車体へ支持するマウント装置として適用されるものである。なお、本実施形態に係る防振装置110において、第1の実施形態に係る防振装置10と同一の部分には、同一符号を付して説明を省略する。
(Second Embodiment)
FIG. 4 shows a vibration isolator according to the second embodiment of the present invention. Similar to the vibration isolator 10 according to the first embodiment, the vibration isolator 110 is a mount that supports a power unit including an engine and a gear box as a vibration generating unit in a vehicle such as an automobile to a vehicle body as a vibration receiving unit. It is applied as a device. In the vibration isolator 110 according to the present embodiment, the same parts as those of the vibration isolator 10 according to the first embodiment are denoted by the same reference numerals and description thereof is omitted.

本実施形態に係る防振装置110が第1の実施形態に係る防振装置10と異なる点は、主液室52、副液室95及びオリフィス通路84を具備していない点である。図4に示されるように、防振装置110には、連結ロッド12のネジ軸16の外周側に略皿状の本体ケーシング112が配置されている。この本体ケーシング112には、その中心部に円形の挿通穴114が穿設されており、この挿通穴114内にはネジ軸16が挿通している。また本体ケーシング24には、挿通穴114の外周側に上方へ向って傾斜したテーパ部116が形成されると共に、外周端部に上方へ屈曲された屈曲部118が環状に形成されている。   The vibration isolator 110 according to the present embodiment is different from the vibration isolator 10 according to the first embodiment in that the main liquid chamber 52, the sub liquid chamber 95, and the orifice passage 84 are not provided. As shown in FIG. 4, in the vibration isolator 110, a substantially dish-shaped main body casing 112 is disposed on the outer peripheral side of the screw shaft 16 of the connecting rod 12. The main body casing 112 has a circular insertion hole 114 formed at the center thereof, and the screw shaft 16 is inserted into the insertion hole 114. The main body casing 24 is formed with a tapered portion 116 inclined upward on the outer peripheral side of the insertion hole 114, and a bent portion 118 bent upward at the outer peripheral end portion.

防振装置110では、ネジ軸16の外周側に肉厚円筒状のスペーサ120が嵌め込まれると共に、固定ナット92が捻じ込まれることにより、本体ケーシング112が連結ロッド12に固定される。また防振装置110では、本体ケーシング112と本体プレート14との間にゴム弾性体44が配置されており、ゴム弾性体44は、その上端部が本体ケーシング112におけるテーパ部116の下面側に加硫接着されると共に、その下端部が本体プレート14の上面側へ加硫接着されている。   In the vibration isolator 110, a thick cylindrical spacer 120 is fitted on the outer peripheral side of the screw shaft 16, and the fixing nut 92 is screwed to fix the main body casing 112 to the connecting rod 12. Further, in the vibration isolator 110, the rubber elastic body 44 is disposed between the main body casing 112 and the main body plate 14, and the upper end portion of the rubber elastic body 44 is added to the lower surface side of the tapered portion 116 in the main body casing 112. At the same time, the lower end portion thereof is vulcanized and bonded to the upper surface side of the main body plate 14.

次に、上記のように構成された本発明の第2の実施形態に係る防振装置110の動作及び作用について説明する。   Next, the operation and action of the vibration isolator 110 according to the second embodiment of the present invention configured as described above will be described.

防振装置110では、ギヤボックス130G側からからの振動入力時に、この振動により吸振主体であるゴム弾性体44が弾性変形する。これにより、ゴム弾性体44によって入力振動が減衰吸収される。このとき、入力振動が軸方向に沿って振幅する縦振動であっても、軸直角方向に沿って振幅する横振動の何れであっても、振動入力時にゴム弾性体44が弾性変形することにより入力振動が減衰吸収される。   In the vibration isolator 110, when vibration is input from the gear box 130G side, the rubber elastic body 44, which is the main vibration absorber, is elastically deformed by the vibration. Thus, the input vibration is attenuated and absorbed by the rubber elastic body 44. At this time, the rubber elastic body 44 is elastically deformed at the time of vibration input, regardless of whether the input vibration is a longitudinal vibration that swings along the axial direction or a lateral vibration that swings along the direction perpendicular to the axis. Input vibration is damped and absorbed.

また本実施形態に係る防振装置110でも、入力荷重が小さく連結ロッド12の軸直角方向に沿った変位量がストッパゴム98の外周面と被覆部48の内周面との隙間よりも小さい場合には、連結部材の軸直角方向に沿った変位がストッパ受部46により制限されることなく、荷重入力に伴って生じる連結ロッド12の軸直角方向に沿った変位(振動)がゴム弾性体44の弾性変形により徐々に減衰吸収される。   Also in the vibration isolator 110 according to the present embodiment, when the input load is small and the displacement amount along the direction perpendicular to the axis of the connecting rod 12 is smaller than the gap between the outer peripheral surface of the stopper rubber 98 and the inner peripheral surface of the covering portion 48. In this case, the displacement (vibration) along the direction perpendicular to the axis of the connecting rod 12 caused by the load input is not limited by the stopper receiving portion 46, but the displacement along the direction perpendicular to the axis of the connecting member is limited by the rubber elastic body 44. It is gradually attenuated and absorbed by elastic deformation.

また入力荷重が大きく、連結ロッド12にストッパゴム98の外周面と被覆部48の内周面と隙間よりも大きな変位が生じると、ストッパゴム98が被覆部48へ圧接すると共に、ストッパゴム98及び被覆部48が弾性変形(圧縮変形)する。これらストッパゴム98及び被覆部48の弾性的な変形抵抗により連結ロッド12の軸直角方向に沿った変位が制限されると共に、ストッパゴム98及び被覆部48により連結ロッド12と本体プレート14との間の振動伝達が抑制される。   If the input load is large and the connecting rod 12 is displaced larger than the gap between the outer peripheral surface of the stopper rubber 98 and the inner peripheral surface of the covering portion 48, the stopper rubber 98 is pressed against the covering portion 48, and the stopper rubber 98 and The covering 48 is elastically deformed (compressed). The elastic deformation resistance of the stopper rubber 98 and the covering portion 48 limits the displacement of the connecting rod 12 along the direction perpendicular to the axis, and the stopper rubber 98 and the covering portion 48 prevent the connecting rod 12 and the main body plate 14 from being connected. Vibration transmission is suppressed.

また防振装置110でも、ゴム弾性体44の空洞部104及び本体プレート14の内周側を連結ロッド12が貫通すると共に、連結ロッド12のロッド本体13の外周側に固定されたストッパゴム98がゴム弾性体44の空洞部104内に配置されていることから、連結ロッド12の軸方向に沿ってゴム弾性体44と重なって配置されるロッド本体13を装置内部に収納した状態にでき、この連結ロッド12のロッド本体13に固定されたストッパ部材96によりストッパ機構を構成できるので、装置の軸方向に沿った寸法増加を抑制しつつ、連結ロッド12の軸方向に沿った寸法を長くすることができると共に、連結ロッドの軸直角方向に沿った過大な変位を防止するためのストッパ機構により装置の軸方向に沿った寸法が拡大することも防止できる。   Also in the vibration isolator 110, the connecting rod 12 penetrates the cavity 104 of the rubber elastic body 44 and the inner peripheral side of the main body plate 14, and a stopper rubber 98 fixed to the outer peripheral side of the rod main body 13 of the connecting rod 12. Since it is disposed in the cavity 104 of the rubber elastic body 44, the rod main body 13 that is disposed so as to overlap the rubber elastic body 44 along the axial direction of the connecting rod 12 can be stored in the apparatus. Since the stopper mechanism can be configured by the stopper member 96 fixed to the rod body 13 of the connecting rod 12, the dimension along the axial direction of the connecting rod 12 is lengthened while suppressing an increase in the dimension along the axial direction of the apparatus. In addition, a stopper mechanism for preventing excessive displacement along the direction perpendicular to the axis of the connecting rod can increase the size along the axis of the device. It can be stopped.

本発明の第1の実施形態に係る防振装置の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of the vibration isolator which concerns on the 1st Embodiment of this invention. 図1に示される防振装置における本体ケーシング及び本体ケーシング内に配置される部品の分解斜視図である。It is a disassembled perspective view of the components arrange | positioned in the main body casing and main body casing in the vibration isolator shown by FIG. 図1に示される防振装置における本体ケーシング内に配置されるオリフィス部材を下方から見た斜視図である。It is the perspective view which looked at the orifice member arrange | positioned in the main body casing in the vibration isolator shown by FIG. 1 from the downward direction. 本発明の第2の実施形態に係る防振装置の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of the vibration isolator which concerns on the 2nd Embodiment of this invention. 図1に示される防振装置から収納室及び可動メンブランを省略した場合の構成を示す側面断面図である。It is side surface sectional drawing which shows a structure when a storage chamber and a movable membrane are abbreviate | omitted from the vibration isolator shown by FIG.

符号の説明Explanation of symbols

10 防振装置
12 連結ロッド(連結部材)
14 本体プレート(第1の本体部材)
24 本体ケーシング(第2の本体部材)
26 内筒金具(第2の本体部材)
28 外筒金具(第2の本体部材)
36 ボトムプレート(第2の本体部材)
44 ゴム弾性体(弾性体)
46 ストッパ受部
48 被覆部(弾性被覆部)
52 主液室
84 オリフィス通路
94 ダイヤフラム
95 副液室
96 ストッパ部材
98 ストッパゴム
110 防振装置
112 本体ケーシング(第2の本体部材)
10 Vibration isolator 12 Connecting rod (connecting member)
14 Body plate (first body member)
24 body casing (second body member)
26 Inner tube fitting (second body member)
28 Outer cylinder fitting (second body member)
36 Bottom plate (second body member)
44 Rubber elastic body (elastic body)
46 Stopper receiving part 48 Covering part (elastic covering part)
52 Main liquid chamber 84 Orifice passage 94 Diaphragm 95 Sub liquid chamber 96 Stopper member 98 Stopper rubber 110 Vibration isolator 112 Main body casing (second main body member)

Claims (6)

環状に形成され、振動受部に連結される第1の本体部材と、
前記第1の本体部材の内周側を貫通すると共に、該第1の本体部材から外側へ突出した基端側が振動発生部に連結されるロッド状の連結部材と、
前記連結部材における前記第1の本体部材から外側へ突出した先端部に連結固定される第2の本体部材と、
前記連結部材の外周側であって前記第1の本体部材と前記第2の本体部材との間に配置され、前記第1の本体部材と前記第2の本体部材とを弾性的に連結した略筒状の弾性体と、を有し、
前記弾性体の中央部に前記連結部材が貫通する空洞部を形成し、
前記空洞部内にストッパゴムを配置すると共に、前記ストッパゴムを前記連結部材の外周側に固定して、該ストッパゴムの外周面を前記第1の本体部材の内周面へ所定の間隔を空けて対向させたことを特徴とする防振装置。
A first body member formed in an annular shape and coupled to the vibration receiving portion;
A rod-shaped connecting member that penetrates the inner peripheral side of the first main body member and has a base end side that protrudes outward from the first main body member is connected to the vibration generating unit;
A second body member coupled and fixed to a tip portion protruding outward from the first body member in the coupling member;
An approximately outer peripheral side of the connecting member and disposed between the first main body member and the second main body member, and elastically connecting the first main body member and the second main body member. A cylindrical elastic body,
Forming a hollow portion through which the connecting member penetrates at the center of the elastic body;
A stopper rubber is disposed in the hollow portion, the stopper rubber is fixed to the outer peripheral side of the connecting member, and the outer peripheral surface of the stopper rubber is spaced from the inner peripheral surface of the first main body member by a predetermined interval. A vibration isolator characterized by facing each other.
前記弾性体と一体的に形成され、前記第1の本体部材の内周面における少なくとも前記ストッパゴムに対向する領域を被覆する弾性被覆部を有することを特徴とする請求項1記載の防振装置。   The vibration isolator according to claim 1, further comprising an elastic covering portion formed integrally with the elastic body and covering at least a region facing the stopper rubber on an inner peripheral surface of the first main body member. . 前記第1の本体部材の内周面及び前記ストッパゴムの外周面の少なくとも一方の断面形状を非円形としたことを特徴とする請求項1又は2記載の防振装置。   The vibration isolator according to claim 1 or 2, wherein a cross-sectional shape of at least one of the inner peripheral surface of the first main body member and the outer peripheral surface of the stopper rubber is a non-circular shape. 前記弾性体と前記ストッパゴムを、入力振動に対する特性がそれぞれ異なるゴム材料により形成したことを特徴とする請求項1乃至3の何れか1項記載の防振装置。   The vibration isolator according to any one of claims 1 to 3, wherein the elastic body and the stopper rubber are formed of rubber materials having different characteristics with respect to input vibration. 液体が封入され前記弾性体を隔壁の一部とする主液室、液体が封入されて内容積が拡縮可能とされた副液室及び、前記主液室と前記副液室とを互いに連通させる制限通路を設けたことを特徴とする請求項1乃至4の何れか1項記載の防振装置。   The main liquid chamber in which the liquid is enclosed and the elastic body is a part of the partition, the sub liquid chamber in which the liquid is enclosed and the internal volume can be expanded and contracted, and the main liquid chamber and the sub liquid chamber are communicated with each other. The vibration isolator according to any one of claims 1 to 4, wherein a restriction passage is provided. 前記主液室、前記副液室及び、前記制限通路をそれぞれ前記連結部材の外周側に配置したことを特徴とする請求項5記載の防振装置。   6. The vibration isolator according to claim 5, wherein the main liquid chamber, the sub liquid chamber, and the restriction passage are arranged on an outer peripheral side of the connecting member.
JP2006156283A 2006-06-05 2006-06-05 Vibration isolator Active JP4976056B2 (en)

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JP2006156283A JP4976056B2 (en) 2006-06-05 2006-06-05 Vibration isolator
PCT/JP2007/061331 WO2007142215A1 (en) 2006-06-05 2007-06-05 Vibration isolation device
CN2007800209049A CN101460761B (en) 2006-06-05 2007-06-05 Vibration isolation device
EP07744688.8A EP2025968B1 (en) 2006-06-05 2007-06-05 Vibration isolation device
US12/303,473 US8061694B2 (en) 2006-06-05 2007-06-05 Vibration isolation device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009107810A1 (en) 2008-02-28 2009-09-03 株式会社ブリヂストン Vibration-damping device
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