JP5001688B2 - Vibration isolator - Google Patents

Vibration isolator Download PDF

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Publication number
JP5001688B2
JP5001688B2 JP2007066235A JP2007066235A JP5001688B2 JP 5001688 B2 JP5001688 B2 JP 5001688B2 JP 2007066235 A JP2007066235 A JP 2007066235A JP 2007066235 A JP2007066235 A JP 2007066235A JP 5001688 B2 JP5001688 B2 JP 5001688B2
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inner peripheral
liquid chamber
main body
vibration
outer peripheral
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JP2008223960A (en
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幸大 杉本
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Bridgestone Corp
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Bridgestone Corp
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Priority to JP2007066235A priority Critical patent/JP5001688B2/en
Priority to EP07744688.8A priority patent/EP2025968B1/en
Priority to US12/303,473 priority patent/US8061694B2/en
Priority to CN2007800209049A priority patent/CN101460761B/en
Priority to PCT/JP2007/061331 priority patent/WO2007142215A1/en
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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、上端部が円筒状の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、マウント本体の内周側であって前記連結部材の上方に設けられ、前記弾性体を隔壁の一部とする主液室と、この主液室の上方に設けられ、マウント本体の上端側(開口端)を閉塞するダイヤフラムを隔壁の一部とする副液室と、主液室と副液室とを互いに連通するオリフィス通路とを備えている。   Further, the vibration isolator described in Patent Document 2 has an upper end connected to a rubber body (elastic body) inside a cylindrical mount body, and a lower end projecting from the mount body (connecting member). A main liquid chamber provided on the inner peripheral side of the mount main body and above the connecting member and having the elastic body as a part of the partition wall, and provided above the main liquid chamber, the upper end side of the mount main body ( A sub liquid chamber having a diaphragm that closes the opening end) as a part of the partition, and an orifice passage that communicates the main liquid chamber and the sub liquid chamber with each other are provided.

特開平10−30675号公報Japanese Patent Laid-Open No. 10-30675

特開2004−263785号公報JP 2004-263785 A

ところで、特許文献1の防振装置では、連結ロッドの外周側に配置された主液室が環状に形成されると共に、この主液室の外周側に環状の副液室が配置されている。このため、特許文献1の防振装置は、特許文献1の防振装置と比較し、連結ロッドの軸心を中心とする径方向に沿った寸法が大きいものになってしまう。   By the way, in the vibration isolator of patent document 1, while the main liquid chamber arrange | positioned at the outer peripheral side of a connection rod is formed cyclically | annularly, the annular sub liquid chamber is arrange | positioned at the outer peripheral side of this main liquid chamber. For this reason, the vibration isolator of patent document 1 will become a thing with a large dimension along the radial direction centering on the axial center of a connecting rod compared with the vibration isolator of patent document 1. FIG.

一方、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、主液室及び副液室が連結部材の軸方向外側に配置されていることから、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。   On the other hand, in the vibration isolator of Patent Document 2, compared to the vibration isolator of Patent Document 1, the main liquid chamber and the sub liquid chamber are disposed on the outer side in the axial direction of the connecting member. If the dimension along the axial direction is not enlarged, the dimension along the axial direction of the connecting member cannot be increased, and the amount of collapse of the connecting member with respect to vibration along the front-rear direction or the left-right direction is relatively large. Therefore, there is a problem that the durability of the elastic body is lowered.

本発明の目的は、上記事実を考慮して、径方向及び軸方向に沿った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る防振装置を提供することにある。   An object of the present invention is to provide a vibration isolator capable of sufficiently increasing the length of the connecting member along the axial direction without enlarging the size of the device along the radial and axial directions in consideration of the above facts. It is to provide.

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、略円筒状に形成され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が挿通する内筒部と、略円筒状に形成され前記内筒部の外周側に配置される外筒部とを有する第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、前記弾性体を隔壁の少なくとも一部として環状に構成され、液体が封入される主液室と、前記連結部材の軸方向に沿って前記主液室と対向するように設けられ、液体が封入される副液室と、環状とされ、前記副液室の隔壁の一部を構成し、該副液室の内容積を拡縮する拡縮方向へ変形可能とされたダイヤフラム本体と、前記ダイヤフラム本体の内周部に全周に亘って固着され、前記内筒部の外周側に嵌挿される内周支持金具と、前記ダイヤフラム本体の外周部に全周に亘って固着され、前記外筒部の内周側に嵌挿固定される外周支持金具と、を有するダイヤフラム部材と、前記軸方向に沿って前記主液室と前記副液室との間に配置され、前記主液室及び前記副液室の内壁面の一部をそれぞれ形成すると共に、前記連結部材により中央部が貫通された仕切部材と、前記主液室と前記副液室とを互いに連通する制限通路と、前記連結部材の先端側から螺合され、前記内周支持金具を押圧しつつ前記連結部材へ固定する固定ナットと、前記第2の本体部材と前記内周支持金具との周方向の相対移動を阻止する相対移動阻止手段と、を備えている。   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 an outer side from the first main body member of the connecting member that is formed in a substantially cylindrical shape. A second main body member having an inner cylindrical portion through which a tip portion protruding to the outer periphery is inserted, an outer cylindrical portion formed in a substantially cylindrical shape and disposed on an outer peripheral side of the inner cylindrical portion, and an outer peripheral side of the connecting member A substantially cylindrical elastic body 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 main liquid chamber which is configured in an annular shape with the elastic body as at least a part of the partition wall, and in which a liquid is enclosed; A sub liquid chamber provided in the axial direction of the connecting member so as to face the main liquid chamber and enclosing the liquid, and an annular shape, constituting a part of the partition wall of the sub liquid chamber, A diaphragm main body that is deformable in an expansion / contraction direction that expands / contracts the internal volume of the liquid chamber, and an inner peripheral support that is fixed to the inner peripheral portion of the diaphragm main body over the entire periphery and is fitted to the outer peripheral side of the inner cylindrical portion A diaphragm member having a metal fitting and an outer peripheral support metal fitting fixed to the outer peripheral portion of the diaphragm main body over the entire circumference and fitted and fixed to the inner peripheral side of the outer cylinder portion, and the axial member along the axial direction A partition member disposed between the main liquid chamber and the sub liquid chamber, forming a part of the inner wall surface of the main liquid chamber and the sub liquid chamber, respectively, and having a central portion penetrated by the connecting member; A restricting passage communicating the main liquid chamber and the sub liquid chamber with each other; and the connecting portion A fixing nut that is screwed from the front end side of the base plate and fixes the inner peripheral support fitting to the connecting member while pressing the inner peripheral support fitting, and a relative that prevents relative movement in the circumferential direction between the second main body member and the inner peripheral support fitting. Movement prevention means.

上記請求項1に係る防振装置では、弾性体、主液室、副液室及び仕切部材が、それぞれ環状に形成されると共に、連結部材を囲むように連結部材の外周側に配置されているので、連結部材の軸方向中間部を、軸方向に沿って弾性体、主液室、副液室及び仕切部材と重なり合うように配置できる。したがって、装置の径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。   In the vibration isolator according to the first aspect, the elastic body, the main liquid chamber, the sub liquid chamber, and the partition member are each formed in an annular shape and arranged on the outer peripheral side of the connecting member so as to surround the connecting member. Therefore, the axial direction intermediate part of a connection member can be arrange | positioned so that an elastic body, a main liquid chamber, a sub liquid chamber, and a partition member may overlap along an axial direction. Therefore, the dimension along the axial direction of the connecting member can be lengthened while suppressing an increase in the dimension along the radial direction of the device.

さらに請求項1に係る防振装置では、仕切部材を間に挟んで副液室が軸方向に沿って主液室と対向するように設けられていることから、副液室を径方向に沿って主液室と重なり合うように配置できるので、副液室が主液室の外周側に配置されている従来の防振装置と比較し、装置の径方向に沿った寸法も小型化できる。   Furthermore, in the vibration isolator according to the first aspect, since the auxiliary liquid chamber is provided so as to face the main liquid chamber along the axial direction with the partition member interposed therebetween, the auxiliary liquid chamber is arranged along the radial direction. Therefore, the dimension along the radial direction of the apparatus can be reduced as compared with the conventional vibration isolator in which the sub liquid chamber is disposed on the outer peripheral side of the main liquid chamber.

また、固定ナットで内周支持金具を連結部材へ固定する際には、内周支持金具を押圧しつつ固定ナットを回転させるが、本発明は上記のように相対移動阻止手段を備えている。したがって、内周支持金具と第2の本体部材とが滑って、固定ナットと内周支持金具とが共回りすることが防止でき、ダイヤフラム本体の捩れを防止することができる。   Further, when the inner peripheral support fitting is fixed to the connecting member with the fixing nut, the fixing nut is rotated while pressing the inner peripheral support fitting, but the present invention includes the relative movement preventing means as described above. Therefore, it is possible to prevent the inner peripheral support fitting and the second main body member from slipping and the fixing nut and the inner peripheral support fitting to rotate together, and to prevent the diaphragm main body from being twisted.

本発明の請求項2に係る防振装置は、前記相対移動阻止手段が、前記内周支持金具の内周面及び前記内筒部の外周面の少なくとも一方が平滑面と比較して摩擦係数の高い高摩擦面を含んで構成されていること、を特徴とすることができる。   The vibration isolator according to claim 2 of the present invention is characterized in that the relative movement preventing means has at least one of an inner peripheral surface of the inner peripheral support bracket and an outer peripheral surface of the inner cylinder portion having a friction coefficient compared to a smooth surface. It is characterized by comprising a high friction surface.

このように、内周支持金具と内筒部との接触部分を高摩擦面で構成することにより、第2の本体部材と内周支持金具との周方向の相対移動を抑制することができる。   Thus, the relative movement in the circumferential direction between the second main body member and the inner peripheral support fitting can be suppressed by configuring the contact portion between the inner peripheral support fitting and the inner cylindrical portion with a high friction surface.

なお、ここでの高摩擦面は、ローレット加工や、その他凹凸を形成する加工により構成することができる。   In addition, the high friction surface here can be comprised by the knurling process and the process which forms other unevenness | corrugations.

本発明の請求項3に係る防振装置は、前記相対移動阻止手段が、前記内周支持金具の内周面を径方向外側へ向かって切欠いた切欠部、及び、前記内筒部の外周面に径方向外側へ向かって突出され前記切欠部と係合する係合凸部、を含んで構成されていること、を特徴とする。   The vibration isolator according to claim 3 of the present invention is characterized in that the relative movement preventing means has a notch portion in which an inner peripheral surface of the inner peripheral support fitting is notched radially outward, and an outer peripheral surface of the inner cylindrical portion. And an engaging convex portion that protrudes radially outward and engages with the notch portion.

このように、内周支持金具の切欠部に内筒部の係合凸部を係合させることにより、第2の本体部材と内周支持金具との周方向の相対移動を阻止することができる。   In this way, by engaging the engagement convex portion of the inner cylinder portion with the notch portion of the inner peripheral support metal fitting, the relative movement in the circumferential direction between the second main body member and the inner peripheral support metal fitting can be prevented. .

本発明の請求項4に係る防振装置は、前記相対移動阻止手段が、前記内周支持金具の内周から内側へ向かって突出した凸部、及び、前記内筒部の前記固定ナット側端部を前記凸部に沿って変形させた係合カシメ部、を含んで構成されていること、を特徴とする。   The vibration isolator according to claim 4 of the present invention is characterized in that the relative movement preventing means includes a convex portion projecting inward from the inner periphery of the inner peripheral support fitting, and the end of the inner cylinder portion on the fixed nut side. It is characterized by including the engagement crimping part which deform | transformed the part along the said convex part.

このように、内周支持金具の凸部に内筒部の端部をカシメ変形させて係合させることにより、第2の本体部材と内周支持金具との周方向の相対移動を阻止することができる。   Thus, the relative movement in the circumferential direction between the second main body member and the inner peripheral support fitting is prevented by crimping and deforming the end portion of the inner cylinder portion to the convex portion of the inner peripheral support fitting. Can do.

本発明の請求項5に係る防振装置は、前記仕切部材が前記第2の本体部材の内側に固定されると共に、前記内周支持金具が前記仕切部材と当接され、前記相対移動阻止手段は、前記内周支持金具の前記仕切部材との当接面及び前記仕切部材の前記内周支持金具との当接面の少なくとも一方が平滑面と比較して摩擦係数の高い高摩擦面を含んで構成されていること、を特徴とする。   In the vibration isolator according to claim 5 of the present invention, the partition member is fixed to the inside of the second body member, and the inner peripheral support fitting is in contact with the partition member, and the relative movement preventing means Includes at least one of a contact surface of the inner peripheral support fitting with the partition member and a contact surface of the partition member with the inner peripheral support fitting includes a high friction surface having a higher friction coefficient than a smooth surface. It is comprised by these.

仕切部材が、第2の本体部材の内側に固定されていて、この仕切部材と内周支持金具とが当接されている場合には、このように高摩擦面を構成して仕切部材と内周支持金具の当接面の摩擦力を高くすることによっても、第2の本体部材と内周支持金具との周方向の相対移動を阻止することができる。   When the partition member is fixed to the inside of the second main body member and the partition member and the inner peripheral support fitting are in contact with each other, the high friction surface is configured in this manner to The relative movement in the circumferential direction between the second main body member and the inner peripheral support metal can also be prevented by increasing the frictional force of the contact surface of the peripheral support metal.

本発明の請求項6に係る防振装置は、前記仕切部材が前記第2の本体部材の内側に固定されると共に、前記内周支持金具が前記仕切部材と当接され、前記相対移動阻止手段は、前記内周支持金具と前記仕切部材との当接部分における前記内周支持金具及び前記仕切部材の一方構成された凹部と他方に構成され前記凹部に係合される凸部を含んで構成されていること、を特徴とする。   In the vibration isolator according to claim 6 of the present invention, the partition member is fixed inside the second main body member, and the inner peripheral support fitting is in contact with the partition member, and the relative movement preventing means Includes a concave portion formed on one side of the inner peripheral support bracket and the partition member at a contact portion between the inner peripheral support bracket and the partition member, and a convex portion configured on the other side and engaged with the concave portion. It is characterized by that.

仕切部材が、第2の本体部材の内側に固定されていて、この仕切部材と内周支持金具とが当接されている場合には、このように仕切部材と内周支持金具とに凹凸形状を構成して係合させることによっても、第2の本体部材と内周支持金具との周方向の相対移動を阻止することができる。   When the partition member is fixed to the inside of the second main body member and the partition member and the inner peripheral support metal fitting are in contact with each other, the partition member and the inner peripheral support metal fitting are thus uneven. The relative movement in the circumferential direction between the second main body member and the inner peripheral support fitting can also be prevented by configuring and engaging.

以上説明したように本発明の防振装置によれば、径方向及び軸方向に沿った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ると共に、ダイヤフラム本体の捩れを防止することができる。   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 enlarging the device size along the radial direction and the axial direction. The twist of the diaphragm main body can be prevented.

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.

(実施形態の構成)   (Configuration of the embodiment)

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。   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(A)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20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 (A), 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 shape on the outer peripheral side of the connecting rod 12. The main body plate 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 20.

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。   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.

ネジ軸16の外周側には、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。   A main body casing 24 formed in a substantially bottomed cylindrical shape is arranged 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 peripheral side thereof, and a substantially cylindrical outer tube fitting 28 is disposed on the outer peripheral side of the inner tube fitting 26.

図2に示すように、内筒金具26は、円筒の筒部27、及び、筒部27の下側端から径方向外側へ延出された環状のフランジ部30を備えている。筒部27の上端側は3箇所で切り欠かれて突状の係合カシメ部27Aが構成されている。   As shown in FIG. 2, the inner tube fitting 26 includes a cylindrical tube portion 27 and an annular flange portion 30 that extends radially outward from the lower end of the tube portion 27. The upper end side of the cylindrical portion 27 is cut out at three locations to form a projecting engagement crimping portion 27A.

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、また、外筒金具28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 outer cylinder fitting 28 is also formed with an annular flange 32 extending at the lower end at its lower end, and the inner and outer diameters are tapered upward at the upper end of the outer cylinder fitting 28. A caulking portion 34 having a reduced diameter is formed.

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、ゴム等の弾性材料、樹脂等の柔軟性を有する材料により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 by an elastic material such as rubber, or a flexible material such as resin, and the outer diameter thereof is the bottom plate. 36 substantially matches the outer diameter. 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(A)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 cylindrical shape whose upper end side is closed by a disk-shaped top plate portion 66, and the outer diameter thereof substantially coincides with the outer diameter of the bottom cover member 56. . As shown in FIG. 3A, the orifice member 64 is formed with a cylindrical insertion portion 68 projecting downward at the center of the top plate portion 66, and in the insertion portion 68, The cylinder part 27 of the inner cylinder metal fitting 26 is inserted. 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(A)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76が形成されており、この閉塞部76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76から所定距離、離れた部位に矩形状の上部連通穴80が構成されている。   As shown in FIG. 3A, the orifice member 64 is formed with a blocking portion 74 extending from the outer peripheral surface of the insertion portion 68 to the flange-shaped portion 72. The blocking portion 74, the insertion portion 68, and the flange As for the shape part 72, 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 76 that traverses the inside of the bowl-shaped portion 72 along the radial direction. The lower end surface of the closed portion 76 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 formed in the saddle-like portion 72 at a position away from the blocking portion 76 by a predetermined distance along the circumferential direction.

防振装置10では、軸方向に沿って主液室52と後述する副液室95との間に配置されたオリフィス部材64、底蓋部材56及びボトムプレート36が、主液室52及び副液室95の内壁面の一部をそれぞれ形成する仕切部材106として構成されている。図3(B)に示されるように、オリフィス部材64には、その下端面にフィルム状のゴム膜65が加硫接着により貼り付けられており、このゴム膜65は、頂板部66及び樋状部72の下面側にもそれぞれ貼り付けられている。   In the vibration isolator 10, the orifice member 64, the bottom cover member 56, and the bottom plate 36 disposed between the main liquid chamber 52 and the sub liquid chamber 95 described later along the axial direction include the main liquid chamber 52 and the sub liquid. It is configured as a partition member 106 that forms part of the inner wall surface of the chamber 95. As shown in FIG. 3 (B), a film-like rubber film 65 is attached to the lower end surface of the orifice member 64 by vulcanization adhesion. The rubber film 65 has a top plate portion 66 and a bowl-like shape. It is also affixed to the lower surface side of the part 72, respectively.

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74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76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 centering on the axis S, and both ends thereof are closed by the closing portions 74. The orifice passage 84 also extends in a C shape along the circumferential direction centering on the axis S, and both ends thereof are closed by the closing portions 76. 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74に対応する部分が扇状に切り欠かれている。これにより、可動メンブラン86は、可動メンブラン86の両端部は、それぞれ厚さ方向に沿った変形抵抗が周方向中間部よりも小さい可動端87とされる。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 a closed portion 74 in the circumferential direction. Is cut out in a fan shape. As a result, the movable membrane 86 has both ends of the movable membrane 86 as movable ends 87 whose deformation resistance along the thickness direction is smaller than that of the intermediate portion in the circumferential direction. 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、オリフィス部材64を挟んで主液室52と逆側にダイヤフラム94が設けられている。ダイヤフラム94は環状とされ、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いる。ダイヤフラム94の外周部は、連結金具88の内周側に全周に亘って加硫接着されている。また、ダイヤフラム94の内周部は、連結リング90の外周側に全周に亘って加硫接着されている。   As shown in FIG. 1, the vibration isolator 10 is provided with a diaphragm 94 on the opposite side of the main liquid chamber 52 with the orifice member 64 interposed therebetween. The diaphragm 94 is annular, and is formed in a thin film shape from, for example, an NR / EPDM rubber material excellent in ozone resistance. The outer peripheral portion of the diaphragm 94 is vulcanized and bonded to the inner peripheral side of the connection fitting 88 over the entire periphery. The inner peripheral portion of the diaphragm 94 is vulcanized and bonded to the outer peripheral side of the connecting ring 90 over the entire periphery.

連結金具88は、環状とされ、外筒金具28の内周側であってオリフィス部材64の上側に嵌め込まれている。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。   The connection fitting 88 is annular and is fitted on the inner peripheral side of the outer cylinder 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.

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、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。   The bottom cover member 56 and the orifice member 64 are sandwiched by the rubber elastic body 44, the connection fitting 88, and the connection ring 90 along the axial direction, and are restricted from moving in the axial direction and fixed in the main body casing 24.

連結リング90は、図1に示すように、外径の異なる3つの円板が積層された形状とされ、上側から順に大径部92A、中径部92B、及び小径部92Cで構成されている。連結リング90の中央部には、内筒金具26の筒部27を挿通可能な挿通穴90Aが構成されている。挿通穴90Aを構成する内周壁の上端には、内周壁を径方向外側に切り欠いた切欠部91が等間隔で3箇所に形成されている。連結リング90は、筒部27の外周面とオリフィス部材64の挿通部68の内周面との間に嵌め込まれ、小径部92Cの先端面がボトムプレート36上面に当接されている。連結リング90は、防振装置10の組立時に、筒部27の係合カシメ部27Aが切欠部91と対応する位置に配置されるように嵌め込まれる。そして、係合カシメ部27Aが径方向外側に開くようにかしめられることにより、図5に示すように、係合カシメ部27Aが切欠部91に係合する。このように、係合カシメ部27Aを切欠部91に係合させることにより、内筒金具26と連結リング90とが周方向に相対移動することが防止されている。   As shown in FIG. 1, the connection ring 90 has a shape in which three discs having different outer diameters are stacked, and includes a large diameter portion 92A, a medium diameter portion 92B, and a small diameter portion 92C in order from the upper side. . An insertion hole 90 </ b> A through which the cylindrical portion 27 of the inner cylindrical metal fitting 26 can be inserted is configured at the center of the connecting ring 90. At the upper end of the inner peripheral wall constituting the insertion hole 90A, three notches 91 are formed at equal intervals by notching the inner peripheral wall radially outward. The connection ring 90 is fitted between the outer peripheral surface of the cylindrical portion 27 and the inner peripheral surface of the insertion portion 68 of the orifice member 64, and the distal end surface of the small diameter portion 92 </ b> C is in contact with the upper surface of the bottom plate 36. When the vibration isolator 10 is assembled, the coupling ring 90 is fitted so that the engagement crimping portion 27 </ b> A of the cylindrical portion 27 is disposed at a position corresponding to the notch portion 91. Then, the crimping portion 27A is caulked so as to open outward in the radial direction, whereby the engagement crimping portion 27A is engaged with the notch 91 as shown in FIG. Thus, by engaging the engagement caulking portion 27A with the notch portion 91, the inner cylinder fitting 26 and the connection ring 90 are prevented from relatively moving in the circumferential direction.

図1に示すように、連結ロッド12には、ネジ軸16に固定ナット97が螺合されている。固定ナット97は、連結リング90の上端面を座面とし、連結リング90を圧接するようにねじ込まれ、スペーサ21との間で内筒金具26、ボトムプレート36、連結リング90を挟持して、これらを連結ロッド12に固定している。   As shown in FIG. 1, a fixing nut 97 is screwed onto the threaded shaft 16 of the connecting rod 12. The fixing nut 97 is screwed in such a manner that the upper end surface of the connection ring 90 is a seating surface and presses the connection ring 90, and sandwiches the inner cylinder fitting 26, the bottom plate 36, and the connection ring 90 with the spacer 21, These are fixed to the connecting rod 12.

これにより、ダイヤフラム94が、連結金具88と連結リング90とにより本体ケーシング24に固定され、本体ケーシング24の上面がダイヤフラム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 a result, the diaphragm 94 is fixed to the main casing 24 by the connecting fitting 88 and the connecting ring 90, and the upper surface of the main casing 24 is closed by the diaphragm 94. 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.

このようにして、ダイヤフラム94を本体ケーシング24に固定する場合、固定ナット97のねじ込みの際に、固定ナット97と連結リング90との間の摩擦力が大きいと、これらが共回りしてしまうことがある。このとき、連結リング90と内筒金具26とが相対移動すると、ダイヤフラム94が捻れてしまうという不都合が生じうる。そこで、本実施形態では、連結リング90と内筒金具26との間の相対移動を、係合カシメ部27Aを切欠部91に係合させることにより防止して、ダイヤフラム94の捻れを防止している。   In this way, when the diaphragm 94 is fixed to the main casing 24, when the fixing nut 97 is screwed in, if the frictional force between the fixing nut 97 and the connecting ring 90 is large, they will rotate together. There is. At this time, if the connecting ring 90 and the inner cylinder fitting 26 move relative to each other, there may be a disadvantage that the diaphragm 94 is twisted. Therefore, in the present embodiment, the relative movement between the connecting ring 90 and the inner cylindrical metal fitting 26 is prevented by engaging the engagement caulking portion 27A with the cutout portion 91, thereby preventing the twisting of the diaphragm 94. Yes.

本体ケーシング24内において、ダイヤフラム94とオリフィス部材64との間には、外部から区画された環状の液室空間が形成される。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されている。   In the main casing 24, an annular liquid chamber space partitioned from the outside is formed between the diaphragm 94 and the orifice member 64. The liquid chamber space is a sub-liquid chamber 95 whose internal volume can be expanded and contracted by deformation of the diaphragm 94 by filling the same liquid as the main liquid chamber 52 therein. The main liquid chamber 52 and the sub liquid chamber 95 are communicated 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.

(実施形態の作用)   (Operation of the embodiment)

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 is brought into contact with 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.

また本実施形態に係る防振装置10では、ゴム弾性体44、主液室52、副液室95及び仕切部材106(オリフィス部材64、底蓋部材56及びボトムプレート36)がそれぞれ環状に形成される共に、これらが連結ロッド12が囲むように連結ロッド12の外周側に配置されていることにより、連結ロッド12の軸方向中間部を、軸方向に沿ってゴム弾性体44、主液室52、副液室95及び仕切部材106と重なり合うように配置できるのでので、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。   Further, in the vibration isolator 10 according to the present embodiment, the rubber elastic body 44, the main liquid chamber 52, the sub liquid chamber 95, and the partition member 106 (the orifice member 64, the bottom cover member 56, and the bottom plate 36) are each formed in an annular shape. In addition, since these are disposed on the outer peripheral side of the connecting rod 12 so that the connecting rod 12 surrounds, the intermediate portion in the axial direction of the connecting rod 12 extends along the axial direction with the rubber elastic body 44 and the main liquid chamber 52. Since the auxiliary liquid chamber 95 and the partition member 106 can be arranged so as to overlap with each other, the dimension along the axial direction of the connecting rod 12 can be increased while suppressing an increase in the dimension along the axial direction of the apparatus.

さらに防振装置10では、仕切部材106を間に挟んで副液室95が軸方向に沿って主液室52と対向するように設けられていることから、副液室95を径方向に沿って主液室52と重なり合うように配置できるので、副液室95が主液室52の外周側に配置されている従来の防振装置と比較し、装置の径方向に沿った寸法も小型化できる。   Further, in the vibration isolator 10, since the sub liquid chamber 95 is provided so as to face the main liquid chamber 52 along the axial direction with the partition member 106 interposed therebetween, the sub liquid chamber 95 is disposed along the radial direction. Therefore, the size along the radial direction of the device is also reduced compared with the conventional vibration isolator in which the sub liquid chamber 95 is disposed on the outer peripheral side of the main liquid chamber 52. it can.

この結果、本実施形態に係る防振装置10によれば、径方向及び軸方向に沿った装置サイズを拡大することなく、連結ロッド12の軸方向に沿った長さを十分に長いものにできる。   As a result, according to the vibration isolator 10 according to the present embodiment, the length along the axial direction of the connecting rod 12 can be made sufficiently long without increasing the device size along the radial direction and the axial direction. .

また本実施形態に係る防振装置10では、ダイヤフラム94がゴム弾性体44とは別体として形成されることにより、ダイヤフラムがゴム弾性体と一体的に形成されている従来の防振装置と比較し、ゴム弾性体44の素材(ゴム種類)とは関係なく、ダイヤフラム94を耐オゾン性に優れたNR/EPDM系のゴム材料により形成できるので、ダイヤフラム94にオゾン劣化等に起因する亀裂等の損傷の発生を長期的に防止でき、またダイヤフラム94の肉厚等の各部寸法に対する設計の自由度が高まるので、ダイヤフラム94を強い繰り返し応力が発生する応力集中部が発生し難い形状に設計できるようになり、これよってもダイヤフラム94の耐久性を向上できる。   Further, in the vibration isolator 10 according to the present embodiment, the diaphragm 94 is formed as a separate body from the rubber elastic body 44, so that it is compared with a conventional vibration isolator in which the diaphragm is formed integrally with the rubber elastic body. However, since the diaphragm 94 can be formed of an NR / EPDM rubber material excellent in ozone resistance regardless of the material (rubber type) of the rubber elastic body 44, the diaphragm 94 can be free from cracks caused by ozone degradation. The occurrence of damage can be prevented for a long period of time, and the degree of freedom in designing the dimensions of each part such as the thickness of the diaphragm 94 is increased. Therefore, the diaphragm 94 can be designed in a shape that does not easily generate a stress concentration part that generates strong repeated stress. Thus, the durability of the diaphragm 94 can be improved.

また、連結リング90をダイヤフラム94の内周部に全周に亘って固着し、この連結リング90を内筒金具26の筒部27外周側に嵌挿固定すると共に、連結金具88をダイヤフラム94の外周部に全周に亘って固着し、この連結金具88を外筒金具28内周側に嵌挿固定し、これらの連結リング90及び連結金具88を本体ケーシング24に連結することにより、ダイヤフラム94における本体ケーシング24との連結部分(ダイヤフラム94の内周部及び外周部)を十分に長いものにできるので、ダイヤフラム94と本体ケーシング24と連結部における応力集中を効果的に抑制し、ダイヤフラム94における連結部分の損傷を効果的に防止できるようになる。   Further, the connecting ring 90 is fixed to the inner peripheral portion of the diaphragm 94 over the entire circumference, and the connecting ring 90 is fitted and fixed to the outer peripheral side of the cylindrical portion 27 of the inner cylindrical metal fitting 26, and the connecting metal fitting 88 is attached to the diaphragm 94. The diaphragm 94 is fixed to the outer peripheral portion over the entire circumference, the connecting metal fitting 88 is fitted and fixed to the inner peripheral side of the outer cylinder metal fitting 28, and the connecting ring 90 and the connecting metal fitting 88 are connected to the main casing 24. Since the connecting portion (the inner peripheral portion and the outer peripheral portion of the diaphragm 94) with the main body casing 24 can be made sufficiently long, stress concentration in the diaphragm 94, the main body casing 24, and the connecting portion is effectively suppressed, and the diaphragm 94 It becomes possible to effectively prevent damage to the connecting portion.

また防振装置10では、仕切部材106の内部に設けられた収納室82が軸心Sを中心とする周方向へ延在すると共に、両端部がそれぞれ閉塞されたC字状に形成され、この収納室82内に収納される可動メンブラン86も、軸心Sを中心とする周方向へ延在すると共に、両端部がそれぞれ可動端87とされたC字状に形成され、可動メンブラン86における可動端87付近の変形抵抗が他の部分より小さくなっていることから、振動入力時に主液室52内の液圧変化に伴って可動メンブラン86が圧力波を受けた場合に、可動メンブラン86の可動端87付近が他の部分よりも優先的に収納室82内で移動開始し、頂板部66又は底蓋部材56に他の部分よりも早く当接する。   Further, in the vibration isolator 10, the storage chamber 82 provided in the partition member 106 extends in the circumferential direction centering on the axis S and is formed in a C shape with both ends closed. The movable membrane 86 housed in the storage chamber 82 also extends in the circumferential direction around the axis S and is formed in a C shape with both ends being movable ends 87. Since the deformation resistance in the vicinity of the end 87 is smaller than that in the other portions, the movable membrane 86 can be moved when the movable membrane 86 receives a pressure wave accompanying a change in the hydraulic pressure in the main liquid chamber 52 during vibration input. The vicinity of the end 87 starts to move in the storage chamber 82 with priority over other parts, and comes into contact with the top plate portion 66 or the bottom cover member 56 earlier than the other parts.

従って、振動入力時には、可動メンブラン86は、一対の可動端87付近を頂板部66又は底蓋部材56に当接させた後に、徐々に接触面積を増加させるので、可動メンブラン全体が同時に頂板部66又は底蓋部材56に当接する場合と比較し、可動メンブラン86が頂板部66又は底蓋部材56に当接する際に生じる打音を効果的に低減できる。   Accordingly, at the time of vibration input, the movable membrane 86 gradually increases the contact area after the vicinity of the pair of movable ends 87 is brought into contact with the top plate portion 66 or the bottom lid member 56, so that the entire movable membrane simultaneously has the top plate portion 66. Or, compared with the case where the movable membrane 86 abuts against the bottom lid member 56, it is possible to effectively reduce the hitting sound generated when the movable membrane 86 abuts against the top plate portion 66 or the bottom lid member 56.

また防振装置10では、可動メンブラン86が当接及び離間を繰り返す底蓋部材56が弾性又は柔軟性を有する材料により形成されると共に、オリフィス部材64における頂板部66の下面側が弾性を有するゴム膜65により被覆されていることから、可動メンブラン86及びゴム膜65が有する衝撃に対する緩衝作用によっても、可動メンブラン86が頂板部66又は底蓋部材56に当接する際に生じる打音が低減される。   Further, in the vibration isolator 10, the bottom cover member 56 in which the movable membrane 86 repeats contact and separation is formed of a material having elasticity or flexibility, and the lower surface side of the top plate portion 66 of the orifice member 64 has elasticity. Since it is covered with 65, the impact sound generated when the movable membrane 86 abuts against the top plate portion 66 or the bottom lid member 56 is also reduced by the shock absorbing action against the impact of the movable membrane 86 and the rubber film 65.

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6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6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. When 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. 6, compared with the thing shown in FIG. 1, the generation | occurrence | production of the hitting sound at the time of the vibration of the movable membrane 86 is lost, and the structure of the apparatus can be simplified.

また、本実施形態では、内筒金具26と連結リング90の周方向への相対移動を、係合カシメ部27Aを切欠部91に係合させることにより阻止したが、その他の構成で阻止することもできる。   Further, in the present embodiment, the relative movement in the circumferential direction of the inner cylinder fitting 26 and the connecting ring 90 is prevented by engaging the engagement caulking portion 27A with the notch portion 91, but other configurations prevent it. You can also.

例えば、図7に示すように、内筒金具26の筒部27を先端部に切欠部を形成することなく僅かに外側へ向かって開いた形状とすると共に、連結リング90の挿通穴90Aの内壁上部にリブ90Rを形成する。そして、筒部27の外側に連結リング90を嵌め込んだ後、筒部27の先端を連結リング90の内周に沿ってかしめる。これにより、リブ90Rが筒部27の先端に食い込むように係合し、内筒金具26と連結リング90の周方向への相対移動を阻止することができる。   For example, as shown in FIG. 7, the cylindrical portion 27 of the inner cylindrical metal fitting 26 has a shape opened slightly outward without forming a notch at the tip, and the inner wall of the insertion hole 90 </ b> A of the connecting ring 90. Ribs 90R are formed on the top. Then, after fitting the connecting ring 90 to the outside of the cylindrical portion 27, the tip of the cylindrical portion 27 is caulked along the inner periphery of the connecting ring 90. Thereby, the rib 90R is engaged so as to bite into the tip of the cylindrical portion 27, and the relative movement in the circumferential direction of the inner cylindrical metal fitting 26 and the connecting ring 90 can be prevented.

また、本実施形態では、ボトムプレート36は本体ケーシング24内に固定されていることから、内筒金具26と連結リング90の周方向の相対移動は、連結リング90とボトムプレート36との相対移動を阻止することにより実現することもできる。例えば、図8に示すように、連結リング90の小径部92Cの先端面に凸部99を形成すると共に、ボトムプレート36に凸部99を挿入可能な凹部39を構成する。そして、凸部99を凹部39に嵌め込んで連結リング90を周方向の相対移動を阻止することもできる。   In the present embodiment, since the bottom plate 36 is fixed in the main body casing 24, the relative movement in the circumferential direction between the inner tube fitting 26 and the connecting ring 90 is relative between the connecting ring 90 and the bottom plate 36. It can also be realized by preventing the above. For example, as shown in FIG. 8, a convex portion 99 is formed on the tip surface of the small diameter portion 92 </ b> C of the connecting ring 90, and a concave portion 39 in which the convex portion 99 can be inserted into the bottom plate 36 is configured. And the convex part 99 can be engage | inserted in the recessed part 39, and the relative movement of the circumferential direction of the connection ring 90 can also be blocked | prevented.

また、内筒金具26と連結リング90の周方向への相対移動の阻止は、連結リング90と内筒金具26とが接する部分の摩擦力を高くすることによっても実現することができる。摩擦力を高くするために、例えば、図9に示すように、筒部27の外周面にローレット加工RTを施したり、連結リング90の挿通穴90Aの内壁に凹凸を形成したりするなどの手法が考えられる。   Moreover, prevention of the relative movement of the inner cylinder fitting 26 and the connecting ring 90 in the circumferential direction can also be realized by increasing the frictional force of the portion where the connecting ring 90 and the inner cylinder fitting 26 are in contact with each other. In order to increase the frictional force, for example, as shown in FIG. 9, a technique such as performing knurling RT on the outer peripheral surface of the cylindrical portion 27 or forming irregularities on the inner wall of the insertion hole 90 </ b> A of the connecting ring 90. Can be considered.

また、本実施形態では、ボトムプレート36は本体ケーシング24内に固定されていることから、内筒金具26と連結リング90の周方向への相対移動の阻止は、連結リング90とボトムプレート36とが接する部分の摩擦力を高くすることによっても実現することができる。摩擦力を高くするために、例えば、図10に示すように、ボトムプレート36の上面や連結リング90の小径部92Cの先端面にローレット加工RTを施したり、凹凸を形成したりするなどの手法が考えられる。   Further, in the present embodiment, since the bottom plate 36 is fixed in the main body casing 24, the relative movement in the circumferential direction of the inner cylinder fitting 26 and the connection ring 90 is prevented from being caused by the connection ring 90 and the bottom plate 36. It can also be realized by increasing the frictional force of the part in contact with. In order to increase the frictional force, for example, as shown in FIG. 10, a technique such as performing knurling RT on the upper surface of the bottom plate 36 or the tip surface of the small diameter portion 92C of the connecting ring 90 or forming irregularities. Can be considered.

本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 this embodiment. 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. (A)は図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、(B)はオリフィス部材の側面断面図である。(A) 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, (B) is side sectional drawing of an orifice member. 本実施形態の連結リングと内筒金具の筒部を示す分解斜視図である。It is a disassembled perspective view which shows the connection ring of this embodiment, and the cylinder part of an inner cylinder metal fitting. 本実施形態の連結リングと内筒金具の筒部とが、かしめ締結された状態を示す斜視図である。It is a perspective view which shows the state by which the connection ring of this embodiment and the cylinder part of the inner cylinder metal fitting were crimped | fastened. 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. 本実施形態の変形例の連結リングと内筒金具の筒部とが、かしめ締結された状態を示す斜視図である。It is a perspective view which shows the state by which the connection ring and the cylinder part of the inner cylinder metal fitting of the modification of this embodiment were crimped | fastened. 本実施形態の変形例の連結リングとボトムプレートと内筒金具の筒部とを示す分解斜視図である。It is a disassembled perspective view which shows the connection ring of the modification of this embodiment, a bottom plate, and the cylinder part of an inner cylinder metal fitting. 本実施形態の他の変形例の連結リングと内筒金具の筒部とを示す分解斜視図である。It is a disassembled perspective view which shows the connection ring and the cylinder part of an inner cylinder metal fitting of the other modification of this embodiment. 本実施形態の他の変形例の連結リングとボトムプレートと内筒金具の筒部とを示す分解斜視図である。It is a disassembled perspective view which shows the connection ring of the other modification of this embodiment, a bottom plate, and the cylinder part of an inner cylinder metal fitting.

符号の説明Explanation of symbols

10 防振装置
12 連結ロッド
24 本体ケーシング
26 内筒金具
27A 係合カシメ部
27 筒部
28 外筒金具
36 ボトムプレート
39 凹部
40 下部連通穴
42 流通開口
44 ゴム弾性体
52 主液室
64 オリフィス部材
84 オリフィス通路
88 連結金具
90 連結リング
90R リブ
90A 挿通穴
91 切欠部
94 ダイヤフラム
95 副液室
97 固定ナット
99 凸部
DESCRIPTION OF SYMBOLS 10 Vibration isolator 12 Connecting rod 24 Main body casing 26 Inner cylinder metal fitting 27A Engagement caulking part 27 Cylinder part 28 Outer cylinder metal fitting 36 Bottom plate 39 Recess 40 Lower communication hole 42 Flow opening 44 Rubber elastic body 52 Main liquid chamber 64 Orifice member 84 Orifice passage 88 Connecting metal 90 Connecting ring 90R Rib 90A Insertion hole 91 Notch 94 Diaphragm 95 Sub liquid chamber 97 Fixing nut 99 Convex

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、
略円筒状に形成され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が挿通する内筒部と、略円筒状に形成され前記内筒部の外周側に配置される外筒部とを有する第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、
前記弾性体を隔壁の少なくとも一部として環状に構成され、液体が封入される主液室と、
前記連結部材の軸方向に沿って前記主液室と対向するように設けられ、液体が封入される副液室と、
環状とされ、前記副液室の隔壁の一部を構成し、該副液室の内容積を拡縮する拡縮方向へ変形可能とされたダイヤフラム本体と、前記ダイヤフラム本体の内周部に全周に亘って固着され、前記内筒部の外周側に嵌挿される内周支持金具と、前記ダイヤフラム本体の外周部に全周に亘って固着され、前記外筒部の内周側に嵌挿固定される外周支持金具と、を有するダイヤフラム部材と、
前記軸方向に沿って前記主液室と前記副液室との間に配置され、前記主液室及び前記副液室の内壁面の一部をそれぞれ形成すると共に、前記連結部材により中央部が貫通された仕切部材と、
前記主液室と前記副液室とを互いに連通する制限通路と、
前記連結部材の先端側から螺合され、前記内周支持金具を押圧しつつ前記連結部材へ固定する固定ナットと、
前記第2の本体部材と前記内周支持金具との周方向の相対移動を阻止する相対移動阻止手段と、
を備えた防振装置。
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;
An inner cylinder portion that is formed in a substantially cylindrical shape and through which a tip portion protruding outward from the first main body member of the connecting member is inserted, and an outer cylinder that is formed in a substantially cylindrical shape and is disposed on the outer peripheral side of the inner cylinder portion A second body member having a portion;
It is the outer peripheral side of the said connection member, Comprising: It arrange | positions between the said 1st main body member and the said 2nd main body member, and connected the said 1st main body member and the said 2nd main body member elastically A substantially cylindrical elastic body;
A main liquid chamber configured to form a ring with the elastic body as at least a part of a partition wall, in which a liquid is enclosed;
A sub liquid chamber provided so as to face the main liquid chamber along the axial direction of the connecting member and enclosing a liquid;
A diaphragm body that is part of a partition wall of the secondary liquid chamber and is deformable in an expansion / contraction direction that expands / contracts the internal volume of the secondary liquid chamber; and an inner peripheral portion of the diaphragm main body on the entire circumference Fixed to the outer peripheral side of the inner cylinder part and fixed to the outer peripheral part of the diaphragm body, and fixed to the inner peripheral side of the outer cylinder part. A diaphragm member having an outer peripheral support fitting,
It is arranged between the main liquid chamber and the sub liquid chamber along the axial direction, and forms a part of the inner wall surface of the main liquid chamber and the sub liquid chamber, respectively, and a central portion is formed by the connecting member. A penetrating partition member;
A restricting passage communicating the main liquid chamber and the sub liquid chamber with each other;
A fixing nut that is screwed from the front end side of the connecting member and is fixed to the connecting member while pressing the inner peripheral support fitting;
Relative movement blocking means for blocking relative movement in the circumferential direction between the second main body member and the inner peripheral support fitting;
Anti-vibration device with
前記相対移動阻止手段は、前記内周支持金具の内周面及び前記内筒部の外周面の少なくとも一方が平滑面と比較して摩擦係数の高い高摩擦面を含んで構成されていること、を特徴とする請求項1に記載の防振装置。   The relative movement blocking means is configured so that at least one of the inner peripheral surface of the inner peripheral support metal fitting and the outer peripheral surface of the inner cylinder part includes a high friction surface having a higher friction coefficient than a smooth surface; The vibration isolator according to claim 1. 前記相対移動阻止手段が、前記内周支持金具の内周面を径方向外側へ向かって切欠いた切欠部、及び、前記内筒部の外周面に径方向外側へ向かって突出され前記切欠部と係合する係合凸部、を含んで構成されていること、を特徴とする請求項1または請求項2に記載の防振装置。   The relative movement preventing means is a notch portion in which an inner peripheral surface of the inner peripheral support metal fitting is cut out radially outward, and is protruded outward in the radial direction on the outer peripheral surface of the inner cylinder portion. The anti-vibration device according to claim 1, comprising an engaging convex portion to be engaged. 前記相対移動阻止手段が、前記内周支持金具の内周面から内側へ向かって突出した凸部、及び、前記内筒部の前記固定ナット側端部を前記凸部に沿って変形させた係合カシメ部、を含んで構成されていること、を特徴とする請求項1乃至請求項3のいずれか1項に記載の防振装置。   The relative movement preventing means includes a convex portion projecting inward from an inner peripheral surface of the inner peripheral support fitting, and a fixed nut side end portion of the inner cylinder portion deformed along the convex portion. The anti-vibration device according to any one of claims 1 to 3, wherein the anti-vibration device includes a crimping portion. 前記仕切部材が前記第2の本体部材の内側に固定されると共に、前記内周支持金具が前記仕切部材と当接され、
前記相対移動阻止手段は、前記内周支持金具の前記仕切部材との当接面及び前記仕切部材の前記内周支持金具との当接面の少なくとも一方が平滑面と比較して摩擦係数の高い高摩擦面を含んで構成されていること、を特徴とする請求項1乃至請求項4のいずれか1項に記載の防振装置。
The partition member is fixed to the inside of the second main body member, and the inner peripheral support fitting is in contact with the partition member,
In the relative movement preventing means, at least one of the contact surface of the inner peripheral support fitting with the partition member and the contact surface of the partition member with the inner support fitting has a higher coefficient of friction than a smooth surface. The vibration isolator according to any one of claims 1 to 4, wherein the anti-vibration device includes a high friction surface.
前記仕切部材が前記第2の本体部材の内側に固定されると共に、前記内周支持金具が前記仕切部材と当接され、
前記相対移動阻止手段は、前記内周支持金具と前記仕切部材との当接部分における前記内周支持金具及び前記仕切部材の一方構成された凹部と他方に構成され前記凹部に係合される凸部を含んで構成されていること、を特徴とする請求項1乃至請求項5のいずれか1項に記載の防振装置。
The partition member is fixed to the inside of the second main body member, and the inner peripheral support fitting is in contact with the partition member,
The relative movement preventing means includes a concave portion formed on one side of the inner peripheral support bracket and the partition member at a contact portion between the inner peripheral support bracket and the partition member, and a convex portion engaged with the concave portion. The vibration isolator according to any one of claims 1 to 5, wherein the anti-vibration device is configured to include a portion.
JP2007066235A 2006-06-05 2007-03-15 Vibration isolator Active JP5001688B2 (en)

Priority Applications (5)

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JP2007066235A JP5001688B2 (en) 2007-03-15 2007-03-15 Vibration isolator
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
CN2007800209049A CN101460761B (en) 2006-06-05 2007-06-05 Vibration isolation device
PCT/JP2007/061331 WO2007142215A1 (en) 2006-06-05 2007-06-05 Vibration isolation device

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