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JP6604825B2 - Liquid-filled vibration isolator - Google Patents

Liquid-filled vibration isolator Download PDF

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JP6604825B2
JP6604825B2 JP2015222881A JP2015222881A JP6604825B2 JP 6604825 B2 JP6604825 B2 JP 6604825B2 JP 2015222881 A JP2015222881 A JP 2015222881A JP 2015222881 A JP2015222881 A JP 2015222881A JP 6604825 B2 JP6604825 B2 JP 6604825B2
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partition plate
liquid chamber
elastic wall
liquid
partition
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JP2017089817A (en
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和幸 飯田
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Toyo Tire Corp
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Description

本発明は液封入式防振装置に関し、特に異音の発生を抑制できる液封入式防振装置に関するものである。   The present invention relates to a liquid-filled vibration isolator, and more particularly to a liquid-filled vibration isolator that can suppress the generation of abnormal noise.

従来から、第1取付具と筒状の第2取付具とを連結する防振基体と、第2取付具に取り付けられて防振基体との間に液体が封入される液室を形成するダイヤフラムと、液室を防振基体側の第1液室とダイヤフラム側の第2液室とに仕切る仕切体と、第1液室と第2液室とを連通するオリフィスとを備える液封入式防振装置が知られている。この種の液封入式防振装置において、仕切体が、オリフィスを形成する環状のオリフィス形成部材と、オリフィス形成部材に加硫接着されると共にオリフィス形成部材の内周面の内側を塞ぐゴム状の弾性壁と、弾性壁に貫通する連結部を介して互いに連結されることで弾性壁を軸方向の両側から挟む一対の仕切板とを備えるものがある(特許文献1)。   2. Description of the Related Art Conventionally, a diaphragm that forms a liquid chamber in which liquid is sealed between a vibration isolating base and a vibration isolating base that is attached to the second mounting tool and connects the first mounting tool and the cylindrical second mounting tool. A liquid enclosure type anti-vibration device comprising: a partition that divides the liquid chamber into a first liquid chamber on the vibration-isolating base side and a second liquid chamber on the diaphragm side; and an orifice that communicates the first liquid chamber and the second liquid chamber. Shaking devices are known. In this type of liquid-filled vibration isolator, the partition body is an annular orifice forming member that forms an orifice, and a rubber-like member that is vulcanized and bonded to the orifice forming member and closes the inside of the inner peripheral surface of the orifice forming member. Some include an elastic wall and a pair of partition plates that are connected to each other via a connecting portion that penetrates the elastic wall to sandwich the elastic wall from both sides in the axial direction (Patent Document 1).

特許文献1に開示される技術では、第1液室に面する一方の仕切板(第1仕切板)は、第2液室に面する他方の仕切板(第2仕切板)より外形が小さく形成されている。これにより、第1液室の加圧変位(圧縮入力)時は第1仕切板により弾性壁の変位規制効果を抑制できるので、第1液室が過度の加圧状態になることを防止できる。一方、第1液室の負圧変位(引張入力)時は、第2仕切板により弾性壁の変位を規制し、オリフィスを流動する液体の共振現象を利用して高い減衰係数を得ることができる。   In the technique disclosed in Patent Document 1, one partition plate (first partition plate) facing the first liquid chamber has a smaller outer shape than the other partition plate (second partition plate) facing the second liquid chamber. Is formed. Thereby, since the displacement restriction effect of the elastic wall can be suppressed by the first partition plate at the time of pressurizing displacement (compression input) of the first liquid chamber, it is possible to prevent the first liquid chamber from being excessively pressurized. On the other hand, at the time of negative pressure displacement (tensile input) of the first liquid chamber, the displacement of the elastic wall is regulated by the second partition plate, and a high damping coefficient can be obtained by utilizing the resonance phenomenon of the liquid flowing through the orifice. .

特開2007−211972号公報JP 2007-211972 A

しかしながら上述した従来の技術では、第1液室の負圧変位(圧縮入力)時に第2仕切板により弾性壁の変位が規制されるので、第1液室が過度の負圧状態になって圧力が液体の飽和水蒸気圧を下回ると、発生した気泡が消滅するときに衝撃音(異音)が生じるという問題点がある。   However, in the conventional technique described above, the displacement of the elastic wall is restricted by the second partition plate when the first liquid chamber is displaced by negative pressure (compression input), so that the first liquid chamber is in an excessively negative pressure state and pressure is increased. If the water vapor pressure is lower than the saturated water vapor pressure of the liquid, there is a problem that an impact sound (abnormal noise) is generated when the generated bubbles disappear.

本発明は上述した問題点を解決するためになされたものであり、第1液室の負圧変位時の異音の発生を抑制できる液封入式防振装置を提供することを目的としている。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a liquid-filled vibration isolator that can suppress the generation of abnormal noise when the first liquid chamber is displaced by negative pressure.

課題を解決するための手段および発明の効果Means for Solving the Problems and Effects of the Invention

この目的を達成するために請求項1記載の液封入式防振装置によれば、第1取付具と筒状の第2取付具とがゴム状弾性体から構成される防振基体で連結される。ゴム状弾性体から構成されるダイヤフラムが第2取付具に取り付けられ、防振基体との間に液体が封入された液室が形成される。仕切体により液室は防振基体側の第1液室とダイヤフラム側の第2液室とに仕切られる。仕切体は、第2液室と第1液室とを連通するオリフィスを形成する環状のオリフィス形成部材が、第2取付具の内側に配置される。ゴム状弾性体から構成される弾性壁の周囲がオリフィス形成部材に接着され、第1液室に面する第1仕切板および第2液室に面する第2仕切板が、弾性壁の中央を貫通する連結部を介して互いに連結される。第1仕切板は連結部の周囲に位置する第1接触部が無負荷状態で弾性壁に接触し、第2仕切板は連結部の周囲に位置する第2接触部が無負荷状態で弾性壁に接触する。第2接触部は、軸方向に投影した投影面の外縁の大きさが、軸方向に投影した第1接触部の投影面の外縁より小さく設定されるので、第1液室の負圧変位時に第2仕切板により弾性壁の変位規制効果を抑制できる。弾性壁の変位によって、第1液室が過度の負圧状態になることを抑制できるので、第1液室の負圧変位時の異音の発生を抑制できる効果がある。 In order to achieve this object, according to the liquid-filled vibration isolator of claim 1, the first fixture and the cylindrical second fixture are connected by a vibration isolating base made of a rubber-like elastic body. The A diaphragm made of a rubber-like elastic body is attached to the second fixture, and a liquid chamber in which a liquid is sealed is formed between the vibration-proof base. The partition chamber partitions the liquid chamber into a first liquid chamber on the vibration-proof base side and a second liquid chamber on the diaphragm side. In the partition, an annular orifice forming member that forms an orifice that communicates between the second liquid chamber and the first liquid chamber is disposed inside the second fixture. The periphery of the elastic wall composed of the rubber-like elastic body is bonded to the orifice forming member, and the first partition plate facing the first liquid chamber and the second partition plate facing the second liquid chamber are located at the center of the elastic wall. They are connected to each other through a connecting part that penetrates. The first partition plate is in contact with the elastic wall when the first contact portion located around the connection portion is unloaded, and the second partition plate is the elastic wall when the second contact portion located around the connection portion is unloaded. To touch. Since the size of the outer edge of the projection surface projected in the axial direction is set to be smaller than the outer edge of the projection surface of the first contact portion projected in the axial direction, the second contact portion is at the time of negative pressure displacement of the first liquid chamber. The displacement regulating effect of the elastic wall can be suppressed by the second partition plate. Since the displacement of the elastic wall can suppress the first liquid chamber from being brought into an excessive negative pressure state, there is an effect of suppressing the generation of abnormal noise when the first liquid chamber is displaced by negative pressure.

請求項2記載の液封入式防振装置によれば、第2仕切板は第2接触部の周囲に位置する周辺部が第2接触部に連接される。周辺部は弾性壁と軸方向の距離を隔てて配置されるので、第1液室の負圧変位時の弾性壁の変形量が小さいときは、弾性壁は周辺部により変形が規制されない。弾性壁の変形量が大きくなって弾性壁と周辺部とが干渉すると、弾性壁は変形が規制される。周辺部によって弾性壁の過度の変形を抑制できるので、請求項1の効果に加え、弾性壁の耐久性を確保できる効果がある。   According to the liquid-filled vibration isolator of claim 2, the second partition plate has a peripheral portion located around the second contact portion connected to the second contact portion. Since the peripheral portion is arranged at a distance in the axial direction from the elastic wall, the deformation of the elastic wall is not restricted by the peripheral portion when the deformation amount of the elastic wall at the time of negative pressure displacement of the first liquid chamber is small. When the amount of deformation of the elastic wall increases and the elastic wall and the peripheral part interfere with each other, the deformation of the elastic wall is restricted. Since excessive deformation of the elastic wall can be suppressed by the peripheral portion, in addition to the effect of the first aspect, there is an effect of ensuring the durability of the elastic wall.

本発明の第1実施の形態における液封入式防振装置の軸方向断面図である。It is an axial sectional view of the liquid filled type vibration isolator in the first embodiment of the present invention. 第1仕切板側から見た仕切体の分解立体図である。It is an exploded three-dimensional view of the partition seen from the 1st partition plate side. 第2仕切板側から見た仕切体の分解立体図である。It is an exploded three-dimensional view of the partition seen from the 2nd partition plate side. 仕切体の軸方向断面図である。It is an axial sectional view of a partition. 第2実施の形態における液封入式防振装置の仕切体の軸方向断面図である。It is an axial sectional view of the partition of the liquid filled type vibration isolator in the second embodiment. 仕切体の分解立体図である。It is an exploded three-dimensional view of a partition. 第3実施の形態における液封入式防振装置の仕切体の軸方向断面図である。It is an axial sectional view of the partition of the liquid filled type vibration isolator in the third embodiment. 仕切体の分解立体図である。It is an exploded three-dimensional view of a partition.

以下、本発明の好ましい実施の形態について添付図面を参照して説明する。まず、図1を参照して液封入式防振装置10の構造について説明する。図1は本発明の第1実施の形態における液封入式防振装置10の軸方向断面図である。なお、図1ではエンジンを支持する前の状態(即ち、エンジンの重量が負荷される前の無負荷状態)を図示している。   Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, the structure of the liquid filled type vibration isolator 10 will be described with reference to FIG. FIG. 1 is an axial sectional view of a liquid filled type vibration damping device 10 according to a first embodiment of the present invention. FIG. 1 illustrates a state before the engine is supported (that is, a no-load state before the weight of the engine is loaded).

液封入式防振装置10は、自動車のエンジン(振動体、図示せず)を支持固定しつつ、そのエンジンの振動を車体フレーム(図示せず)へ伝達させないようにするための防振装置であり、図1に示すように、エンジン側に取り付けられる第1取付具11と、エンジン下方の車体フレーム側に取付けられる筒状の第2取付具13と、これらを連結すると共にゴム状弾性体から構成される防振基体17と、第2取付具13に取付けられて防振基体17との間に液室(第1液室23及び第2液室24)を形成すると共にゴム状弾性体から構成されるダイヤフラム20とを備えている。   The liquid-filled vibration isolator 10 is a vibration isolator for supporting and fixing an automobile engine (vibrating body, not shown) while preventing the vibration of the engine from being transmitted to a vehicle body frame (not shown). 1. As shown in FIG. 1, a first fixture 11 attached to the engine side, a cylindrical second fixture 13 attached to the vehicle body frame side below the engine, and a rubber-like elastic body connecting these components. A liquid chamber (a first liquid chamber 23 and a second liquid chamber 24) is formed between the vibration-proof base 17 and the vibration-proof base 17 attached to the second fixture 13, and from a rubber-like elastic body. A diaphragm 20 is provided.

第1取付具11は、アルミニウム合金などの金属材料から略円柱状に形成される部材であり、その上端面にボルトが螺着されるねじ穴12が形成されている。ねじ穴12に螺着されるボルトを介して第1取付具11はエンジン側に取り付けられる。第2取付具13は、防振基体17が加硫成形される筒状金具14と、その筒状金具14の下方にかしめ加工により固着される底金具15とを備えている。筒状金具14は上広がりの開口を有する筒状に、底金具15は底部を有するカップ状に、それぞれ鉄鋼材料などから形成されている。底金具15の底部にボルト16が下向きに突設されている。このボルト16を介して第2取付具13は車体側に取り付けられる。   The first fixture 11 is a member formed in a substantially cylindrical shape from a metal material such as an aluminum alloy, and a screw hole 12 into which a bolt is screwed is formed on an upper end surface thereof. The first fixture 11 is attached to the engine side via a bolt screwed into the screw hole 12. The second fixture 13 includes a cylindrical metal fitting 14 on which a vibration-proof base 17 is vulcanized and a bottom metal fitting 15 fixed below the cylindrical metal fitting 14 by caulking. The cylindrical metal fitting 14 is formed in a cylindrical shape having an opening extending upward, and the bottom metal fitting 15 is formed in a cup shape having a bottom portion, respectively, from a steel material or the like. A bolt 16 projects downward from the bottom of the bottom metal fitting 15. The second fixture 13 is attached to the vehicle body via the bolt 16.

防振基体17は、ゴム状弾性体から円錐台形状に形成される部材であり、第1取付具11の下面側と筒状金具14の上端開口部との間に加硫接着されている。防振基体17の下端部には、筒状金具14の内周面を覆うゴム膜18,19が連なっている。ゴム膜19は、内径が、ゴム膜18の内径より大きい段差状に形成されている。   The anti-vibration base 17 is a member formed in a truncated cone shape from a rubber-like elastic body, and is vulcanized and bonded between the lower surface side of the first fixture 11 and the upper end opening of the cylindrical fitting 14. Rubber films 18 and 19 covering the inner peripheral surface of the cylindrical metal fitting 14 are connected to the lower end portion of the vibration isolating base 17. The rubber film 19 is formed in a step shape in which the inner diameter is larger than the inner diameter of the rubber film 18.

ダイヤフラム20は、ゴム状弾性体から蛇腹状に屈曲したゴム膜として形成されており、上面視円環状の取付板21に外周が加硫接着されている。ダイヤフラム20は、取付板21が、筒状金具14により底金具15と共にかしめ加工により狭持固定されることで、第2取付具13に取着される。その結果、ダイヤフラム20の上面側と防振基体17の下面側との間に液室が形成される。液室には、エチレングリコール等の不凍性の液体(図示せず)が封入される。   The diaphragm 20 is formed as a rubber film bent in a bellows shape from a rubber-like elastic body, and the outer periphery is vulcanized and bonded to an annular mounting plate 21 as viewed from above. The diaphragm 20 is attached to the second fixture 13 by the mounting plate 21 being clamped and fixed together with the bottom fitting 15 by the cylindrical fitting 14. As a result, a liquid chamber is formed between the upper surface side of the diaphragm 20 and the lower surface side of the vibration isolating substrate 17. An antifreeze liquid (not shown) such as ethylene glycol is sealed in the liquid chamber.

仕切体30は、液室を防振基体17側の第1液室23とダイヤフラム20側の第2液室24とに区画するための部材であり、防振基体17とダイヤフラム20との間に配設される。仕切体30は、第2取付具13の内側に配置される環状のオリフィス形成部材31と、オリフィス形成部材31の内周面40で囲まれた部分を塞ぐ弾性壁50と、弾性壁50を軸方向の両側から挟む第1仕切板60及び第2仕切板70とを備えている。   The partition 30 is a member for partitioning the liquid chamber into a first liquid chamber 23 on the vibration isolating base 17 side and a second liquid chamber 24 on the diaphragm 20 side, and between the vibration isolating base 17 and the diaphragm 20. Arranged. The partition 30 includes an annular orifice forming member 31 disposed inside the second fixture 13, an elastic wall 50 that covers a portion surrounded by the inner peripheral surface 40 of the orifice forming member 31, and the elastic wall 50 as an axis. A first partition plate 60 and a second partition plate 70 sandwiched from both sides in the direction are provided.

図2から図4を参照して仕切体30について説明する。図2は第1仕切板60側から見た仕切体30の分解立体図であり、図3は第2仕切板70側から見た仕切体30の分解立体図であり、図4は仕切体30の軸方向断面図である。   The partition 30 will be described with reference to FIGS. 2 is an exploded three-dimensional view of the partition body 30 viewed from the first partition plate 60 side, FIG. 3 is an exploded view of the partition body 30 viewed from the second partition plate 70 side, and FIG. FIG.

図2及び図3に示すように仕切体30の外郭を構成するオリフィス形成部材31は、第2取付具13の内周面(ゴム膜19)との間に周方向へ延びるオリフィス25(図1参照)を形成するための剛体からなる部材であり、軸心Oと直交して配置される円環状の壁部32と、壁部32の内周に連設されると共に軸心O方向(軸方向)へ延びる筒状の胴部34と、胴部34の下端部から径方向外方へフランジ状に張り出す壁部35とを備えている。   As shown in FIGS. 2 and 3, the orifice forming member 31 constituting the outline of the partition body 30 is provided with an orifice 25 (FIG. 1) extending in the circumferential direction between the inner peripheral surface (rubber film 19) of the second fixture 13. A ring-shaped wall portion 32 that is disposed orthogonal to the axis O, and that is connected to the inner periphery of the wall portion 32 and that is in the direction of the axis O (axis A cylindrical body portion 34 extending in the direction), and a wall portion 35 projecting radially outward from the lower end portion of the body portion 34 in a flange shape.

オリフィス形成部材31は、壁部32,35に切欠部33、開口部36がそれぞれ凹欠形成される。壁部32,35及び胴部34を接続し切欠部33と開口部36とを隔てる縦壁37がオリフィス形成部材31に設けられるので、オリフィス25(図1参照)は、縦壁37により周方向に分断され、切欠部33を介して第1液室23に連通されると共に、開口部36を介して第2液室24に連通される。即ち、オリフィス形成部材31により切欠部33から開口部36まで約1周の流路長をもつオリフィス25が形成される。オリフィス形成部材31は、軸方向において壁部32を挟んで胴部34の反対側に延出する円環状の延出部38と、延出部38を挟んで壁部32と反対側の延出部38の径方向内側に突出する円環状の凸部39とが設けられている。   The orifice forming member 31 is formed with a notch 33 and an opening 36 in the walls 32 and 35, respectively. Since the vertical wall 37 that connects the wall portions 32 and 35 and the body portion 34 and separates the notch 33 and the opening 36 is provided in the orifice forming member 31, the orifice 25 (see FIG. 1) is circumferentially moved by the vertical wall 37. And is communicated with the first liquid chamber 23 through the notch 33 and with the second liquid chamber 24 through the opening 36. That is, the orifice forming member 31 forms the orifice 25 having a flow path length of about one round from the notch 33 to the opening 36. The orifice forming member 31 includes an annular extending portion 38 that extends to the opposite side of the body portion 34 across the wall portion 32 in the axial direction, and an extension that is opposite to the wall portion 32 across the extending portion 38. An annular convex portion 39 protruding inward in the radial direction of the portion 38 is provided.

図4に示すように、弾性壁50はゴム状弾性体から構成される部材であり、オリフィス形成部材31の延出部38及び凸部39の内周面40に外周面が加硫接着されている。弾性壁50はオリフィス形成部材31に加硫接着される膜状の部材であり、壁面51,52がそれぞれ第1液室23、第2液室24に面する。弾性壁50は、径方向中央を厚さ方向(軸心O方向)に貫通する円形の中央孔53が形成されており、軸方向両側へ突出する円環状の突条54が、中央孔53の周囲に設けられている。弾性壁50は、突条54近くの軸方向厚さ(壁面51,52間の距離)よりオリフィス形成部材31近くの軸方向厚さが大きく設定されており、延出部38から軸心O方向へ隆起する円環状の隆起部55が設けられている。   As shown in FIG. 4, the elastic wall 50 is a member made of a rubber-like elastic body, and the outer peripheral surface is vulcanized and bonded to the extended portion 38 of the orifice forming member 31 and the inner peripheral surface 40 of the convex portion 39. Yes. The elastic wall 50 is a film-like member that is vulcanized and bonded to the orifice forming member 31, and the wall surfaces 51 and 52 face the first liquid chamber 23 and the second liquid chamber 24, respectively. The elastic wall 50 is formed with a circular central hole 53 that penetrates the center in the radial direction in the thickness direction (axial center O direction). It is provided around. The elastic wall 50 is set such that the axial thickness near the orifice forming member 31 is larger than the axial thickness near the ridge 54 (distance between the wall surfaces 51 and 52), and the axial direction O extends from the extending portion 38. An annular raised portion 55 that protrudes toward the top is provided.

弾性壁50は、湾曲面状に形成された壁面51,52の内、第2液室24に面する壁面52に、軸方向に陥没する凹部56が形成されている。凹部56は、弾性壁50の周方向に断続的に複数個(本実施の形態では4個)が等間隔に設けられている。凹部56は、軸方向視が略扇状に形成されており、弾性壁50の中心(中央孔53の中心)を通る軸心Oとオリフィス形成部材31の内周面40とを結ぶ線分の中点より外周側に設けられている。   The elastic wall 50 has a concave portion 56 that is recessed in the axial direction on the wall surface 52 facing the second liquid chamber 24 among the wall surfaces 51, 52 formed in a curved surface. A plurality of recesses 56 (four in the present embodiment) are provided at regular intervals in the circumferential direction of the elastic wall 50. The concave portion 56 is formed in a substantially fan shape when viewed in the axial direction, and is a line segment connecting the axis O passing through the center of the elastic wall 50 (center of the central hole 53) and the inner peripheral surface 40 of the orifice forming member 31. It is provided on the outer peripheral side from the point.

図2に戻って説明する。第1仕切板60及び第2仕切板70は、軸方向視において外形が弾性壁50の外形(オリフィス形成部材31の内周面40の大きさ)より小さく設定された略円形状の部材である。第1仕切板60は中央部61及び外周部64が熱可塑性樹脂により一体に成形されており、第2仕切板70は中央部71が熱可塑性樹脂により成形されている。中央部61,71は、弾性壁50の突条54の軸方向の両側が嵌合する環状溝62,72がそれぞれ形成されている。   Returning to FIG. The first partition plate 60 and the second partition plate 70 are substantially circular members whose outer shape is set smaller than the outer shape of the elastic wall 50 (the size of the inner peripheral surface 40 of the orifice forming member 31) when viewed in the axial direction. . The center part 61 and the outer peripheral part 64 of the first partition plate 60 are integrally formed of a thermoplastic resin, and the center part 71 of the second partition plate 70 is formed of a thermoplastic resin. The central portions 61 and 71 are respectively formed with annular grooves 62 and 72 into which both axial sides of the protrusion 54 of the elastic wall 50 are fitted.

第2仕切板70は、軸方向へ向けて突出する連結部73が、中央部71の中央に設けられており、第1仕切板60は、中央部61の中央に連結部73が嵌合する嵌合凹部63が形成されている。連結部73が嵌合凹部63に嵌合した状態で超音波溶着により固定されることで第1仕切板60と第2仕切板70とは連結され、弾性壁50は第1仕切板60及び第2仕切板70によって軸方向の両側から挟まれる。   The second partition plate 70 is provided with a connecting portion 73 protruding in the axial direction at the center of the central portion 71, and the first partition plate 60 is fitted with the connecting portion 73 at the center of the central portion 61. A fitting recess 63 is formed. The first partition plate 60 and the second partition plate 70 are connected by fixing the connecting portion 73 by ultrasonic welding in a state in which the connection portion 73 is fitted in the fitting recess 63, and the elastic wall 50 is connected to the first partition plate 60 and the first partition plate 60. The two partition plates 70 are sandwiched from both sides in the axial direction.

第1仕切板60は、外周部64が、弾性壁50の壁面51に径方向内側の面が密着し、径方向外側の面が壁面51から離れるように湾曲している。第1仕切板60は、中央部61の全体および外周部64の径方向内側の一部が、無負荷状態(エンジンの重量が負荷される前の状態)で弾性壁50の壁面51に接触する第1接触部65を構成する。第2仕切板70は、中央部71の全体が、無負荷状態で弾性壁50の壁面52に接触する第2接触部74を構成する。第2接触部74は、軸方向に投影した投影面の大きさが、軸方向に投影した第1接触部65の投影面より小さく設定されている。なお、第1仕切板60は、第1接触部65の外縁が、弾性壁50に形成された凹部56(凹部56の外側の縁)より径方向内側に位置する。   The first partition plate 60 is curved so that the outer peripheral portion 64 has a radially inner surface in close contact with the wall surface 51 of the elastic wall 50 and a radially outer surface away from the wall surface 51. As for the 1st partition plate 60, the whole center part 61 and a part of radial direction inner side of the outer peripheral part 64 contact the wall surface 51 of the elastic wall 50 in a no-load state (state before load of an engine weight). The first contact portion 65 is configured. The 2nd partition plate 70 comprises the 2nd contact part 74 where the whole center part 71 contacts the wall surface 52 of the elastic wall 50 in a no-load state. The size of the projection surface projected in the axial direction of the second contact portion 74 is set smaller than that of the first contact portion 65 projected in the axial direction. In the first partition plate 60, the outer edge of the first contact portion 65 is positioned radially inward from the recess 56 (the outer edge of the recess 56) formed in the elastic wall 50.

次に液封入式防振装置10(図1参照)の製造方法について説明する。まず、第1取付具11と筒状金具14とが防振基体17により連結された第1成形体と、ダイヤフラム20が加硫成形されると共に取付板21が加硫接着された第2成形体とを、ゴム加硫金型によりそれぞれ加硫成形する。これとは別に、ゴム加硫金型により弾性壁50を加硫成形して、オリフィス形成部材31に弾性壁50を接着する。弾性壁50の表裏両側から第1仕切板60及び第2仕切板70を挟み込み、超音波溶着により連結部73を固着することで仕切体30を製造する。   Next, a manufacturing method of the liquid filled type vibration isolator 10 (see FIG. 1) will be described. First, a first molded body in which the first fixture 11 and the cylindrical metal fitting 14 are connected by a vibration-isolating base 17, and a second molded body in which the diaphragm 20 is vulcanized and the mounting plate 21 is vulcanized and bonded. Are each vulcanized and molded by a rubber vulcanization mold. Separately, the elastic wall 50 is vulcanized by a rubber vulcanization mold, and the elastic wall 50 is bonded to the orifice forming member 31. The partition 30 is manufactured by sandwiching the first partition plate 60 and the second partition plate 70 from both the front and back sides of the elastic wall 50 and fixing the connecting portion 73 by ultrasonic welding.

液体中で、第1成形体の下方開口から仕切体30を第1仕切板60側から筒状金具14内へ挿入した後、筒状金具14内へ第2成形体を挿入する。筒状金具14を縮径加工して、筒状金具14に仕切体30及びダイヤフラム20を取り付ける。その後、第1取付具11が下方となる姿勢で、この部材を液体外へ取り出し、この姿勢を維持しつつ底金具15を被せ、筒状金具14の下方開口に底金具15をかしめ加工により固着する。これにより液封入式防振装置10の製造が完了する。   In the liquid, the partition 30 is inserted into the cylindrical fitting 14 from the first partition plate 60 side through the lower opening of the first molded body, and then the second molded body is inserted into the cylindrical fitting 14. The cylindrical metal fitting 14 is reduced in diameter, and the partition body 30 and the diaphragm 20 are attached to the cylindrical metal fitting 14. Thereafter, in a posture in which the first fixture 11 is in a downward position, this member is taken out of the liquid, and the bottom fitting 15 is put on while maintaining this posture, and the bottom fitting 15 is fixed to the lower opening of the cylindrical fitting 14 by caulking. To do. Thereby, the manufacture of the liquid filled type vibration isolator 10 is completed.

次に液封入式防振装置10の動作について説明する。液封入式防振装置10に高周波数域の微振幅振動が入力される場合は、第1仕切板60及び第2仕切板70が一体となって往復動することで、第1液室23の液圧を吸収して振動を低減できる。   Next, the operation of the liquid filled type vibration isolator 10 will be described. When a small amplitude vibration in a high frequency range is input to the liquid-filled vibration isolator 10, the first partition plate 60 and the second partition plate 70 are reciprocated together so that the first liquid chamber 23 Vibration can be reduced by absorbing hydraulic pressure.

一方、液封入式防振装置10に低周波数域の大振幅振動が入力される場合に、第1液室23の加圧変位(防振基体17の圧縮入力)時は、第1仕切板60(特に第1接触部65)により弾性壁50の変位が規制されるので、オリフィス25を流動する液体の共振現象を利用して高い減衰係数を得ることができる。第1液室23の負圧変位(防振基体17の引張入力)時は、第2仕切板70による弾性壁50の変位を規制する効果が乏しいので、弾性壁50を第1液室23側へ撓み変形し易くできる。弾性壁50の変形により第1液室23の急激な減圧を防ぐので、第1液室23にキャビテーションを生じ難くすることができ、衝撃音(異音)の発生を抑制できる。   On the other hand, when a large amplitude vibration in a low frequency range is input to the liquid-filled vibration isolator 10, the first partition plate 60 is used when the first liquid chamber 23 is displaced under pressure (compression input of the vibration isolator base 17). Since the displacement of the elastic wall 50 is regulated by (especially the first contact portion 65), a high attenuation coefficient can be obtained by utilizing the resonance phenomenon of the liquid flowing through the orifice 25. At the time of negative pressure displacement of the first liquid chamber 23 (tensile input of the vibration isolator base 17), the effect of restricting the displacement of the elastic wall 50 by the second partition plate 70 is poor, so the elastic wall 50 is placed on the first liquid chamber 23 side. It can be easily bent and deformed. Since the first liquid chamber 23 is prevented from being rapidly depressurized by the deformation of the elastic wall 50, it is possible to prevent cavitation from occurring in the first liquid chamber 23, and it is possible to suppress the generation of impact sound (abnormal noise).

オリフィス形成部材31は、径方向内方へ向けて突出する凸部39が設けられているので、弾性壁50の付け根の部分(外周部分)の剛性を上げて、低周波大振幅時の弾性壁50の変位を規制する効果を向上できる。さらに、隆起部55も弾性壁50の付け根の部分の剛性を高める効果がある。   Since the orifice forming member 31 is provided with a convex portion 39 protruding radially inward, the rigidity of the base portion (outer peripheral portion) of the elastic wall 50 is increased, and the elastic wall at the time of low frequency and large amplitude The effect of regulating 50 displacements can be improved. Further, the raised portion 55 also has an effect of increasing the rigidity of the base portion of the elastic wall 50.

弾性壁50は、壁面52に凹部56が形成されることで厚さを部分的に薄くできるので、撓み変形させ易くでき、弾性壁50のばねを軟らかくできる。弾性壁50に取り付けられた第1仕切板60は、第1接触部65の外縁が凹部56より径方向内側に位置するので、第1接触部65が弾性壁50の変形を制限する機能を抑制できる。よって、凹部56により弾性壁50のばねを軟らかくできる。   Since the thickness of the elastic wall 50 can be partially reduced by forming the recess 56 in the wall surface 52, the elastic wall 50 can be easily bent and deformed, and the spring of the elastic wall 50 can be softened. The first partition plate 60 attached to the elastic wall 50 suppresses the function of the first contact portion 65 limiting the deformation of the elastic wall 50 because the outer edge of the first contact portion 65 is positioned radially inward from the recess 56. it can. Therefore, the spring of the elastic wall 50 can be softened by the recess 56.

弾性壁50は中央に突条54が形成されているので、弾性壁50の中央の剛性を確保できる。剛性の高い突条54に中央部71が取り付けられた第2仕切板70が第1仕切板60に連結されるので、第1仕切板60が壁面51の上で不安定に揺れ動くことを防止できる。その結果、液封入式防振装置10による安定した振動低減効果を確保できる。   Since the elastic wall 50 has the protrusion 54 formed at the center, the rigidity of the center of the elastic wall 50 can be secured. Since the second partition plate 70 having the central portion 71 attached to the high-rigid protrusion 54 is connected to the first partition plate 60, the first partition plate 60 can be prevented from unstablely swaying on the wall surface 51. . As a result, the stable vibration reduction effect by the liquid filled type vibration isolator 10 can be ensured.

次に図5及び図6を参照して第2実施の形態について説明する。第1実施の形態では、第2仕切板70が外周部を有していない場合について説明した。これに対し第2実施の形態では、第2仕切板90が外周部91を有する場合について説明する。なお、第1実施の形態で説明した部分と同一の部分については、同一の符号を付して以下の説明を省略する。図5は第2実施の形態における液封入式防振装置の仕切体80の軸方向断面図であり、図6は仕切体80の分解立体図である。仕切体80は、第1実施の形態で説明した液封入式防振装置10の仕切体30に代えて装着される。仕切体80は、オリフィス形成部材31と、オリフィス形成部材31に加硫接着された弾性壁50と、弾性壁50を軸方向の両側から挟む第1仕切板60及び第2仕切板90とを備えている。   Next, a second embodiment will be described with reference to FIGS. In 1st Embodiment, the case where the 2nd partition plate 70 did not have an outer peripheral part was demonstrated. On the other hand, 2nd Embodiment demonstrates the case where the 2nd partition plate 90 has the outer peripheral part 91. FIG. In addition, about the part same as the part demonstrated in 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. FIG. 5 is a sectional view in the axial direction of the partition 80 of the liquid filled type vibration isolator according to the second embodiment, and FIG. 6 is an exploded view of the partition 80. The partition 80 is mounted in place of the partition 30 of the liquid-filled vibration isolator 10 described in the first embodiment. The partition 80 includes an orifice forming member 31, an elastic wall 50 vulcanized and bonded to the orifice forming member 31, and a first partition plate 60 and a second partition plate 90 that sandwich the elastic wall 50 from both sides in the axial direction. ing.

第2仕切板90は、軸方向視において外形が弾性壁50の外形(オリフィス形成部材31の内周面40の大きさ)より小さく設定された略円形状の部材である。第2仕切板90は中央部71及び外周部91が熱可塑性樹脂により一体に成形されている。第2仕切板90は、外周部91が、弾性壁50の突条54の外側の壁面52に全面(凹部56を除く)が密着する円板状に形成されている。第2仕切板90は、中央部71及び外周部91の全体が、無負荷状態(エンジンの重量が負荷される前の状態)で弾性壁50の壁面52に接触する第2接触部92を構成する。第2接触部92は、軸方向に投影した投影面の大きさが、軸方向に投影した第1接触部65の投影面より小さく設定されている。なお、第2仕切板90は、第2接触部92の外縁が、弾性壁50に形成された凹部56の径方向外側の縁より中心側(連結部73側)に位置する。   The second partition plate 90 is a substantially circular member whose outer shape is set smaller than the outer shape of the elastic wall 50 (the size of the inner peripheral surface 40 of the orifice forming member 31) when viewed in the axial direction. As for the 2nd partition plate 90, the center part 71 and the outer peripheral part 91 are integrally shape | molded with the thermoplastic resin. As for the 2nd partition plate 90, the outer peripheral part 91 is formed in the disk shape which the whole surface (except for the recessed part 56) closely_contact | adheres to the wall surface 52 of the outer side of the protrusion 54 of the elastic wall 50. FIG. The second partition plate 90 constitutes a second contact portion 92 in which the entire central portion 71 and the outer peripheral portion 91 are in contact with the wall surface 52 of the elastic wall 50 in a no-load state (a state before the weight of the engine is loaded). To do. In the second contact portion 92, the size of the projection surface projected in the axial direction is set smaller than the projection surface of the first contact portion 65 projected in the axial direction. In the second partition plate 90, the outer edge of the second contact portion 92 is positioned closer to the center side (the connecting portion 73 side) than the radially outer edge of the recess 56 formed in the elastic wall 50.

第2実施の形態によれば、高周波数域の微振幅振動が入力される場合は、第1仕切板60及び第2仕切板90が一体となって往復動することで、第1液室23の液圧を吸収して振動を低減できる。一方、低周波数域の大振幅振動が入力される場合に、第1液室23の加圧変位(防振基体17の圧縮入力)時は、第1仕切板60(特に第1接触部65)により弾性壁50の変位が規制されるので、オリフィス25により高い減衰係数を得ることができる。第1液室23の負圧変位(防振基体17の引張入力)時は、第1仕切板60に比べて第2仕切板90による弾性壁50の変位を規制する効果が乏しいので、弾性壁50を第1液室23側へ撓み変形し易くできる。弾性壁50の変形により第1液室23の急激な減圧を防ぎ、第1液室23にキャビテーションを生じ難くできる。第2接触部92は突条54の周囲の壁面52に接触しているので、弾性壁50の第1液室23側への撓み変形量を制限できる。よって、キャビテーションの抑制と弾性壁50の耐久性の確保とを両立できる。   According to the second embodiment, when a small amplitude vibration in a high frequency range is input, the first liquid chamber 23 is reciprocally moved together by the first partition plate 60 and the second partition plate 90. The vibration can be reduced by absorbing the hydraulic pressure. On the other hand, when large-amplitude vibration in a low frequency range is input, the first partition plate 60 (particularly the first contact portion 65) is used when the first liquid chamber 23 is displaced under pressure (compression input of the vibration-isolating base 17). Therefore, the displacement of the elastic wall 50 is restricted, so that a high damping coefficient can be obtained by the orifice 25. At the time of negative pressure displacement of the first liquid chamber 23 (tensile input of the vibration isolation base 17), the effect of regulating the displacement of the elastic wall 50 by the second partition plate 90 is less than that of the first partition plate 60. 50 can be easily bent and deformed toward the first liquid chamber 23. Due to the deformation of the elastic wall 50, rapid decompression of the first liquid chamber 23 can be prevented, and cavitation can hardly occur in the first liquid chamber 23. Since the second contact portion 92 is in contact with the wall surface 52 around the ridge 54, the amount of deformation of the elastic wall 50 toward the first liquid chamber 23 can be limited. Therefore, both suppression of cavitation and securing of the durability of the elastic wall 50 can be achieved.

凹部56は弾性壁50の壁面52の周方向に断続的に設けられているので、隣り合う凹部56間の部分(陥没していない部分)は、第2仕切板90が軸方向に振動する間も第2仕切板90(第2接触部92)に接触した状態を維持できる。よって、弾性壁50と第2仕切板90との干渉(打撃)に起因する異音を抑制できる。   Since the recesses 56 are intermittently provided in the circumferential direction of the wall surface 52 of the elastic wall 50, a portion between the adjacent recesses 56 (a portion that is not depressed) is during the second partition plate 90 vibrates in the axial direction. Also, the state in contact with the second partition plate 90 (second contact portion 92) can be maintained. Therefore, abnormal noise caused by interference (blow) between the elastic wall 50 and the second partition plate 90 can be suppressed.

弾性壁50に取り付けられた第2仕切板90は、第2接触部92の外縁が凹部56(径方向外側の縁)より径方向内側に位置するので、第2接触部92が弾性壁50の変形を制限する機能を抑制できる。よって、凹部56により弾性壁50のばねを軟らかくできる。   In the second partition plate 90 attached to the elastic wall 50, the outer edge of the second contact portion 92 is positioned radially inward from the concave portion 56 (edge on the outer side in the radial direction). The function of limiting deformation can be suppressed. Therefore, the spring of the elastic wall 50 can be softened by the recess 56.

弾性壁50に形成された凹部56は、弾性壁50に荷重がかけられていない中立位置(無負荷状態)で、径方向外側の縁部(壁面52)が第2仕切板90に密着することなく、第2仕切板90との間で隙間が確保されている。その隙間に、オリフィス25よりも高周波数域で作用する高周波オリフィスとしての機能をもたせることができる。この部分で特定の周波数帯における液共振を生じさせ、当該周波数帯の動ばね定数を低減できる。凹部56の数や大きさ、隙間の大きさや長さ等を変えることで、特性のチューニングが可能である。   The concave portion 56 formed in the elastic wall 50 is such that the radially outer edge (wall surface 52) is in close contact with the second partition plate 90 in a neutral position (no load state) where no load is applied to the elastic wall 50. Instead, a gap is secured between the second partition plate 90 and the second partition plate 90. The gap can have a function as a high-frequency orifice that operates in a higher frequency range than the orifice 25. In this portion, liquid resonance in a specific frequency band is generated, and the dynamic spring constant of the frequency band can be reduced. The characteristics can be tuned by changing the number and size of the recesses 56 and the size and length of the gap.

次に図7及び図8を参照して第3実施の形態について説明する。第2実施の形態では、無負荷状態において第2仕切板90が弾性壁50(凹部56を除く)に密着する場合について説明した。これに対し第3実施の形態では、第2仕切板100の径方向外側が弾性壁50と離間する場合について説明する。なお、第1及び第2実施の形態で説明した部分と同一の部分については、同一の符号を付して以下の説明を省略する。図7は第3実施の形態における液封入式防振装置の仕切体81の軸方向断面図であり、図8は仕切体81の分解立体図である。仕切体81は、第1実施の形態で説明した液封入式防振装置10の仕切体30に代えて装着される。仕切体81は、オリフィス形成部材31と、オリフィス形成部材31に加硫接着された弾性壁50と、弾性壁50を軸方向の両側から挟む第1仕切板60及び第2仕切板100とを備えている。   Next, a third embodiment will be described with reference to FIGS. In 2nd Embodiment, the case where the 2nd partition plate 90 contact | adhered to the elastic wall 50 (except for the recessed part 56) was demonstrated in the no-load state. On the other hand, 3rd Embodiment demonstrates the case where the radial direction outer side of the 2nd partition plate 100 spaces apart with the elastic wall 50. FIG. In addition, about the part same as the part demonstrated in 1st and 2nd embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted. FIG. 7 is an axial sectional view of the partition 81 of the liquid filled type vibration isolator according to the third embodiment, and FIG. 8 is an exploded view of the partition 81. The partition 81 is mounted in place of the partition 30 of the liquid-filled vibration isolator 10 described in the first embodiment. The partition 81 includes an orifice forming member 31, an elastic wall 50 vulcanized and bonded to the orifice forming member 31, and a first partition plate 60 and a second partition plate 100 that sandwich the elastic wall 50 from both sides in the axial direction. ing.

第2仕切板100は、軸方向視において外形が弾性壁50の外形(オリフィス形成部材31の内周面40の大きさ)より小さく設定された略碗状の部材である。第2仕切板100は中央部71及び外周部101が熱可塑性樹脂により一体に成形されている。第2仕切板100は、外周部101が、弾性壁50の突条54の外側の壁面52に内周縁が密着し、径方向外側へ向かうにつれて次第に壁面52から離れる湾曲状に形成されている。   The second partition plate 100 is a substantially bowl-shaped member whose outer shape is set smaller than the outer shape of the elastic wall 50 (the size of the inner peripheral surface 40 of the orifice forming member 31) when viewed in the axial direction. As for the 2nd partition plate 100, the center part 71 and the outer peripheral part 101 are integrally shape | molded with the thermoplastic resin. In the second partition plate 100, the outer peripheral portion 101 is formed in a curved shape in which the inner peripheral edge is in close contact with the outer wall surface 52 of the protrusion 54 of the elastic wall 50 and gradually moves away from the wall surface 52 toward the outer side in the radial direction.

第2仕切板100は、中央部71の全体が、無負荷状態(エンジンの重量が負荷される前の状態)で弾性壁50の壁面52に接触する第2接触部102を構成する。第2接触部102は、軸方向に投影した投影面の大きさが、軸方向に投影した第1接触部65の投影面より小さく設定されている。なお、第2仕切板100は、第2接触部102の外縁が、弾性壁50に形成された凹部56の径方向外側の縁より中心側(連結部73側)に位置する。   The second partition plate 100 constitutes a second contact portion 102 in which the entire central portion 71 contacts the wall surface 52 of the elastic wall 50 in a no-load state (a state before the weight of the engine is loaded). The size of the projection surface projected in the axial direction of the second contact unit 102 is set smaller than that of the first contact unit 65 projected in the axial direction. In the second partition plate 100, the outer edge of the second contact portion 102 is positioned closer to the center side (the connecting portion 73 side) than the radially outer edge of the recess 56 formed in the elastic wall 50.

第2仕切板100は、第2接触部102に連接される周辺部103が、第2接触部102の周囲に位置する。周辺部103は弾性壁50と軸方向の距離を隔てて配置される部位であり、本実施の形態では、軸方向の距離が、径方向外側へ向かうにつれて次第に大きくなる湾曲状に形成されている。周辺部103は、曲率が、弾性壁50の壁面52の曲率より大きく設定されている。周辺部103は、外縁が、凹部56の径方向外側の縁より径方向の外側に位置する。   In the second partition plate 100, a peripheral portion 103 connected to the second contact portion 102 is located around the second contact portion 102. The peripheral portion 103 is a portion that is disposed at a distance in the axial direction from the elastic wall 50. In the present embodiment, the peripheral portion 103 is formed in a curved shape that gradually increases in the axial direction as it goes radially outward. . The peripheral portion 103 is set to have a curvature larger than that of the wall surface 52 of the elastic wall 50. The outer edge of the peripheral portion 103 is located on the outer side in the radial direction from the outer edge of the concave portion 56 in the radial direction.

第3実施の形態によれば、高周波数域の微振幅振動が入力される場合は、第1仕切板60及び第2仕切板100が一体となって往復動することで、第1液室23の液圧を吸収して振動を低減できる。一方、低周波数域の大振幅振動が入力される場合に、第1液室23の加圧変位(防振基体17の圧縮入力)時は、第1仕切板60(特に第1接触部65)により弾性壁50の変位が規制されるので、オリフィス25により高い減衰係数を得ることができる。第1液室23の負圧変位(防振基体17の引張入力)時は、第1仕切板60に比べて第2仕切板100による弾性壁50の変位を規制する効果が乏しいので、弾性壁50を第1液室23側へ撓み変形し易くできる。弾性壁50の変形により第1液室23の急激な減圧を防ぎ、第1液室23にキャビテーションを生じ難くできる。   According to the third embodiment, when a fine amplitude vibration in a high frequency range is input, the first liquid chamber 23 is reciprocated together by the first partition plate 60 and the second partition plate 100. The vibration can be reduced by absorbing the hydraulic pressure. On the other hand, when large-amplitude vibration in a low frequency range is input, the first partition plate 60 (particularly the first contact portion 65) is used when the first liquid chamber 23 is displaced under pressure (compression input of the vibration-isolating base 17). Therefore, the displacement of the elastic wall 50 is restricted, so that a high damping coefficient can be obtained by the orifice 25. At the time of negative pressure displacement of the first liquid chamber 23 (tensile input of the vibration isolation base 17), the effect of regulating the displacement of the elastic wall 50 by the second partition plate 100 is less than that of the first partition plate 60. 50 can be easily bent and deformed toward the first liquid chamber 23. Due to the deformation of the elastic wall 50, rapid decompression of the first liquid chamber 23 can be prevented, and cavitation can hardly occur in the first liquid chamber 23.

第2仕切板100は、第2接触部102の外側に周辺部103が形成されており、周辺部103は弾性壁50と軸方向の距離を隔てているので、周辺部103と弾性壁50との間隔により弾性壁50の弾性変形量を確保し、弾性壁50と周辺部103とが干渉した場合に弾性壁50の変位を規制できる。弾性壁50の第1液室23側への撓み変形量を制限できるので、キャビテーションの抑制効果を高めつつ、弾性壁50の耐久性を確保できる。   The second partition plate 100 has a peripheral portion 103 formed outside the second contact portion 102, and the peripheral portion 103 is separated from the elastic wall 50 in the axial direction. The amount of elastic deformation of the elastic wall 50 is ensured by the distance between the elastic wall 50 and the displacement of the elastic wall 50 can be restricted when the elastic wall 50 and the peripheral portion 103 interfere with each other. Since the amount of deformation of the elastic wall 50 toward the first liquid chamber 23 can be limited, the durability of the elastic wall 50 can be ensured while enhancing the effect of suppressing cavitation.

弾性壁50に取り付けられた第2仕切板100は、第2接触部102の外縁が凹部56(径方向外側の縁)より径方向内側に位置するので、第2接触部102が弾性壁50の変形を制限する機能を抑制できる。よって、凹部56により弾性壁50のばねを軟らかくできる。   In the second partition plate 100 attached to the elastic wall 50, the outer edge of the second contact portion 102 is positioned radially inward from the concave portion 56 (the outer edge in the radial direction). The function of limiting deformation can be suppressed. Therefore, the spring of the elastic wall 50 can be softened by the recess 56.

弾性壁50に形成された凹部56は、弾性壁50に荷重がかけられていない中立位置(無負荷状態)で、径方向外側の縁部(壁面52)が第2仕切板100に密着することなく、第2仕切板100との間で隙間が確保されている。その隙間に、オリフィス25よりも高周波数域で作用する高周波オリフィスとしての機能をもたせることができる。なお、大振幅振動時には、第2仕切板100が軸方向に相対変位することで、その隙間が第2仕切板100によって塞がれる。そのため、オリフィス25による高減衰性能を確保できる。   The concave portion 56 formed in the elastic wall 50 is such that a radially outer edge (wall surface 52) is in close contact with the second partition plate 100 in a neutral position (no load state) where no load is applied to the elastic wall 50. There is no gap between the second partition plate 100 and the second partition plate 100. The gap can have a function as a high-frequency orifice that operates in a higher frequency range than the orifice 25. During large amplitude vibration, the second partition plate 100 is relatively displaced in the axial direction so that the gap is closed by the second partition plate 100. Therefore, high attenuation performance by the orifice 25 can be ensured.

以上、実施の形態に基づき本発明を説明したが、本発明は上記実施の形態に何ら限定されるものではなく、本発明の趣旨を逸脱しない範囲内で種々の改良変形が可能であることは容易に推察できるものである。例えば、第1仕切板60や第2仕切板70,90,100の形状や凹部56の数や大きさ等は、実施の形態に記載したものに限定されず、適宜設定できる。   The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed. For example, the shape of the first partition plate 60 and the second partition plates 70, 90, 100, the number and size of the recesses 56 are not limited to those described in the embodiment, and can be set as appropriate.

上記各実施の形態では、第2仕切板70,90,100に連結部73を設け、第1仕切板60に形成された嵌合凹部63に連結部73を挿入して第1仕切板60と第2仕切板70,90,100とを連結する場合について説明したが、必ずしもこれに限られるものではない。例えば、第2仕切板70,90,100に嵌合凹部を形成し、第1仕切板60に連結部を設け、第2仕切板70,90,100の嵌合凹部に第1仕切板60の連結部を挿入して、第1仕切板60と第2仕切板70,90,100とを連結することは当然可能である。また、連結部73に代えて第2仕切板70,90,100に凹部を形成し、第1仕切板60や第2仕切板70,90,100とは別の部材(連結部)を用い、別の部材(連結部)を凹部に挿入して第1仕切板60と第2仕切板70,90,100とを連結することは当然可能である。   In each of the above embodiments, the second partition plates 70, 90, 100 are provided with the connection portions 73, and the connection portions 73 are inserted into the fitting recesses 63 formed in the first partition plates 60, Although the case where the 2nd partition plates 70, 90, and 100 were connected was demonstrated, it is not necessarily restricted to this. For example, a fitting recess is formed in the second partition plates 70, 90, 100, a connecting portion is provided in the first partition plate 60, and the first partition plate 60 is inserted into the fitting recess of the second partition plates 70, 90, 100. It is naturally possible to connect the first partition plate 60 and the second partition plates 70, 90, and 100 by inserting a connecting portion. Moreover, it replaces with the connection part 73, forms a recessed part in the 2nd partition plates 70, 90, 100, and uses the member (connection part) different from the 1st partition plate 60 and the 2nd partition plates 70, 90, 100, It is naturally possible to connect the first partition plate 60 and the second partition plates 70, 90, 100 by inserting another member (connecting portion) into the recess.

上記各実施の形態では、自動車のエンジンを弾性支持するエンジンマウントとして液封入式防振装置10を用いる場合について説明したが、必ずしもこれに限られるものではない。ボディマウント、デフマウント等、任意の振動体の振動を抑制する防振装置に液封入式防振装置10を適用することは当然可能である。   In each of the above embodiments, the case where the liquid-filled vibration isolator 10 is used as an engine mount that elastically supports an automobile engine has been described. However, the present invention is not necessarily limited thereto. Of course, the liquid-filled vibration isolator 10 can be applied to a vibration isolator that suppresses vibration of an arbitrary vibrating body such as a body mount or a differential mount.

上記各実施の形態では説明を省略したが、弾性膜50を軸方向へ往復動するアクチュエータを配置した能動型防振装置に仕切体30,80,81を適用することは当然可能である。   Although description is omitted in each of the above embodiments, it is naturally possible to apply the partitions 30, 80, 81 to an active vibration isolator in which an actuator that reciprocates the elastic film 50 in the axial direction is arranged.

上記各実施の形態では、仕切体30,80,81によって第1液室23及び第2液室24が形成され、第1液室23と第2液室24との間がオリフィス25によって接続される液封入式防振装置について説明したが、必ずしもこれに限られるものではない。例えば、要求される防振性能に応じて、第1液室23と第2液室24との間を接続するオリフィスを追加することは当然可能である。また、第1液室23及び第2液室24に加え、さらに1乃至複数の副液室を有する構成とすることは当然可能である。この場合には、第1液室23、第2液室24及び副液室の内の2つの液室間を、オリフィス25以外の他の1乃至複数のオリフィスによって連通させることができる。   In each of the embodiments described above, the first liquid chamber 23 and the second liquid chamber 24 are formed by the partition bodies 30, 80, 81, and the first liquid chamber 23 and the second liquid chamber 24 are connected by the orifice 25. However, the present invention is not necessarily limited to this. For example, it is naturally possible to add an orifice that connects between the first liquid chamber 23 and the second liquid chamber 24 in accordance with the required vibration isolation performance. In addition to the first liquid chamber 23 and the second liquid chamber 24, it is naturally possible to have one or more sub liquid chambers. In this case, two liquid chambers among the first liquid chamber 23, the second liquid chamber 24, and the sub liquid chamber can be communicated with each other by one or more orifices other than the orifice 25.

上記各実施の形態では説明を省略したが、弾性膜50の壁面51,52、第1仕切板60及び第2仕切板70,90,100の形状、連結部73の長さ等を設定することにより、第1仕切板60と第2仕切板70,90,100とを連結するときに、第1仕切板60及び第2仕切板70,90,100を弾性膜50の壁面51,52に押し付け、弾性膜50の一部を軸方向へ予圧縮することは当然可能である。これにより、仕切体30,80,81(弾性壁50)のばね定数や弾性壁50の変形し易さ等を調整できる。   Although description is omitted in each of the above embodiments, the shape of the wall surfaces 51 and 52 of the elastic membrane 50, the shape of the first partition plate 60 and the second partition plates 70, 90, and 100, the length of the connecting portion 73, and the like are set. Thus, when connecting the first partition plate 60 and the second partition plates 70, 90, 100, the first partition plate 60 and the second partition plates 70, 90, 100 are pressed against the wall surfaces 51, 52 of the elastic membrane 50. Of course, it is possible to pre-compress part of the elastic membrane 50 in the axial direction. Thereby, the spring constant of the partition 30, 80, 81 (elastic wall 50), the ease of deformation | transformation of the elastic wall 50, etc. can be adjusted.

10 液封入式防振装置
11 第1取付具
13 第2取付具
17 防振基体
20 ダイヤフラム
23 第1液室(液室の一部)
24 第2液室(液室の一部)
25 オリフィス
30,80,81 仕切体
31 オリフィス形成部材
50 弾性壁
60 第1仕切板
65 第1接触部
70,90,100 第2仕切板
73 連結部
74,92,102 第2接触部
103 周辺部
DESCRIPTION OF SYMBOLS 10 Liquid enclosure type vibration isolator 11 1st attachment 13 Second attachment 17 Anti-vibration base | substrate 20 Diaphragm 23 1st liquid chamber (a part of liquid chamber)
24 Second liquid chamber (part of liquid chamber)
25 Orifice 30, 80, 81 Partition 31 Orifice forming member 50 Elastic wall 60 First partition plate 65 First contact portion 70, 90, 100 Second partition plate 73 Connection portion 74, 92, 102 Second contact portion 103 Peripheral portion

Claims (2)

第1取付具および筒状の第2取付具と、
前記第1取付具と前記第2取付具とを連結するゴム状弾性体から構成される防振基体と、
前記第2取付具に取り付けられて前記防振基体との間に液体が封入された液室を形成するゴム状弾性体から構成されるダイヤフラムと、
前記液室を前記防振基体側の第1液室と前記ダイヤフラム側の第2液室とに仕切る仕切体とを備え、
前記仕切体は、前記第2液室と前記第1液室とを連通するオリフィスを形成する、前記第2取付具の内側に配置される環状のオリフィス形成部材と、
前記オリフィス形成部材に周囲が接着されるゴム状弾性体から構成される弾性壁と、
前記弾性壁の中央を貫通する連結部を介して互いに連結される、前記第1液室に面する第1仕切板および前記第2液室に面する第2仕切板とを備え、
前記第1仕切板は、前記連結部の周囲に位置し無負荷状態で前記弾性壁に接触する第1接触部を備え、
前記第2仕切板は、前記連結部の周囲に位置し無負荷状態で前記弾性壁に接触する第2接触部を備え、
前記第2接触部は、軸方向に投影した投影面の外縁の大きさが、軸方向に投影した前記第1接触部の投影面の外縁より小さく設定されることを特徴とする液封入式防振装置。
A first fixture and a cylindrical second fixture;
An anti-vibration base composed of a rubber-like elastic body connecting the first fixture and the second fixture;
A diaphragm composed of a rubber-like elastic body that is attached to the second fixture and forms a liquid chamber in which a liquid is sealed between the anti-vibration base;
A partition that divides the liquid chamber into a first liquid chamber on the vibration-proof base side and a second liquid chamber on the diaphragm side;
The partition is formed with an annular orifice forming member disposed inside the second fixture, forming an orifice communicating the second liquid chamber and the first liquid chamber;
An elastic wall composed of a rubber-like elastic body whose periphery is bonded to the orifice forming member;
A first partition plate facing the first liquid chamber and a second partition plate facing the second liquid chamber, which are coupled to each other via a coupling portion penetrating the center of the elastic wall;
The first partition plate includes a first contact portion that is located around the connection portion and contacts the elastic wall in an unloaded state;
The second partition plate includes a second contact portion that is located around the coupling portion and contacts the elastic wall in an unloaded state,
The liquid contact type prevention device characterized in that the size of the outer edge of the projection surface projected in the axial direction is set smaller than the outer edge of the projection surface of the first contact portion projected in the axial direction. Shaker.
前記第2仕切板は、前記第2接触部に連接されると共に前記第2接触部の周囲に位置する周辺部を備え、
前記周辺部は、前記弾性壁と軸方向の距離を隔てて配置されることを特徴とする請求項1記載の液封入式防振装置。
The second partition plate includes a peripheral portion connected to the second contact portion and positioned around the second contact portion,
The liquid-filled vibration isolator according to claim 1, wherein the peripheral portion is disposed at a distance in the axial direction from the elastic wall.
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