JP2010169225A

JP2010169225A - Vibration control device

Info

Publication number: JP2010169225A
Application number: JP2009014113A
Authority: JP
Inventors: Yuzo Hattori; 優三服部; Katsumi Someya; 勝己染谷; Naoki Maeda; 直樹前田
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2009-01-26
Filing date: 2009-01-26
Publication date: 2010-08-05

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device which secures strokes in a main liquid chamber regardless of its compact size. SOLUTION: A cylindrical part 22 of a partitioning member 20 is provided with a retreat part 22A that retreats inside in the radial direction, in one part thereof in the circumferential direction. An orifice 34 and an auxiliary liquid chamber 42 are structured on the main liquid chamber 40 side rather than a bottom part 26 of the partitioning member 20, and they are communicated with each other through an opening part 36 opened from the orifice 34 toward the retreat part 22A. COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、一般産業機械、自動車におけるエンジンマウント等として用いられ、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吸収及び減衰させる防振装置に関する。 The present invention relates to a vibration isolator that is used as an engine mount or the like in a general industrial machine or an automobile and absorbs and attenuates vibration transmitted from a vibration generating unit such as an engine to a vibration receiving unit such as a vehicle body.

例えば、車両の振動発生部となるエンジンと振動受部となる車体との間にはエンジンマウントとしての防振装置が配設されており、この防振装置はエンジンが発生する振動を吸収し、車体側への振動伝達を抑制する。このような防振装置としては、装置内部に弾性体及び一対の液室が設けられると共に、制限通路を通して一対の液室が互いに連通された液体封入式のものが知られている。この液体封入式の防振装置によれば、搭載されたエンジンが作動して振動が発生した場合には、弾性体の制振機能及び、一対の液室間を連通するオリフィス内の液体の粘性抵抗等で振動を吸収し、車体側への振動伝達を抑制する。 For example, an anti-vibration device as an engine mount is disposed between an engine that is a vibration generation unit of a vehicle and a vehicle body that is a vibration receiving unit, and the anti-vibration device absorbs vibration generated by the engine, Suppresses vibration transmission to the vehicle body. As such an anti-vibration device, a liquid-sealed device is known in which an elastic body and a pair of liquid chambers are provided inside the device, and the pair of liquid chambers communicate with each other through a restriction passage. According to this liquid-filled vibration isolator, when vibration is generated when the mounted engine is operated, the vibration damping function of the elastic body and the viscosity of the liquid in the orifice communicating between the pair of liquid chambers Absorbs vibration with resistance, etc., and suppresses vibration transmission to the vehicle body.

上記のような従来の液体封入式の防振装置としては、例えば、特許文献１に示されるようなものがある。特許文献１に記載の防振装置は、仕切部材で液室が主室（主液室）と副室（副液室）とに仕切られ、副室の隔壁はダイヤフラムによって構成されている。このような構成の防振装置では、通常、主液室と制限通路との連通口は仕切部材の隔壁よりも主液室側に構成され、副液室と制限通路との連通口は仕切部材の隔壁よりも副液室側に構成される。 As a conventional liquid-filled vibration isolator as described above, for example, there is one disclosed in Patent Document 1. In the vibration isolator described in Patent Document 1, the liquid chamber is partitioned into a main chamber (main liquid chamber) and a sub chamber (sub liquid chamber) by a partition member, and the partition wall of the sub chamber is configured by a diaphragm. In the vibration isolator having such a configuration, the communication port between the main liquid chamber and the restriction passage is normally configured on the main liquid chamber side with respect to the partition wall of the partition member, and the communication port between the sub liquid chamber and the restriction passage is the partition member. It is comprised in the subliquid chamber side rather than the partition.

ところで、主液室の軸方向には主振動が入力されるため、軸方向のストローク、すなわち、弾性体と仕切壁との間の距離を充分確保する必要がある。軸方向のストロークを確保するためには、主液室を大きくする必要があるが、防振装置のサイズはコンパクトにしたいという要請がある。
特許３４９８２３４号 By the way, since main vibration is input in the axial direction of the main liquid chamber, it is necessary to ensure a sufficient axial stroke, that is, a distance between the elastic body and the partition wall. In order to ensure the axial stroke, it is necessary to enlarge the main liquid chamber, but there is a demand for the size of the vibration isolator to be compact.
Patent 3498234

本発明の目的は、上記事実を考慮して成されたものであり、コンパクトなサイズで主液室のストロークを確保することの可能な防振装置を提供することである。 An object of the present invention has been made in consideration of the above facts, and is to provide a vibration isolator capable of ensuring a main liquid chamber stroke with a compact size.

上記目的を達成するため、本発明の請求項１に係る防振装置は、振動発生部及び振動受け部の一方に連結される第１取付部材と、筒状とされ、主振動の入力方向に筒軸方向が沿うように振動発生部及び振動受け部の他方に連結される第２取付部材と、前記第１取付部材と第２取付部材との間に配設され、両者を連結する弾性体と、前記弾性体を隔壁の一部として前記第２取付部材の内側に構成され、液体が封入された主液室と、液体が封入され、隔壁の少なくとも一部がダイヤフラムにより形成されて拡縮可能とされた副液室と、筒状の筒部、前記筒部の一端から径方向外側に連続して構成される鍔部、及び、前記筒部の他端に構成される底部と、を有し、前記鍔部の外周が前記第２取付部材の内周に沿い、前記底部が前記副液室側に配置されるようにして前記主液室と前記副液室との間を仕切る仕切部材と、前記仕切部材と別体の環状とされ、前記仕切部材の筒部と前記第２取付部材との間に配置され、前記主液室と前記副液室とを連通させる制限通路の少なくとも一部を構成する制限通路部材と、を備え、前記仕切部材の筒部には周方向の一部に径方向内側へ退避する退避部が構成され、前記制限通路と前記副液室とが、前記仕切部材の底部よりも前記主液室側に構成され前記制限通路から前記退避部へ向かって開口された開口部を介して連通されている。 In order to achieve the above object, a vibration isolator according to claim 1 of the present invention has a first mounting member connected to one of a vibration generating portion and a vibration receiving portion, and is formed in a cylindrical shape in the input direction of main vibration. A second mounting member connected to the other of the vibration generating portion and the vibration receiving portion so that the cylinder axis direction is along, and an elastic body disposed between the first mounting member and the second mounting member and connecting the two mounting members And the elastic body as a part of the partition wall and configured inside the second mounting member, the main liquid chamber in which the liquid is sealed, the liquid is sealed, and at least a part of the partition wall is formed by a diaphragm and can be expanded and contracted An auxiliary liquid chamber, a cylindrical tube portion, a flange portion that is continuously formed radially outward from one end of the tube portion, and a bottom portion that is configured at the other end of the tube portion. The outer periphery of the flange portion is disposed along the inner periphery of the second mounting member, and the bottom portion is disposed on the side of the secondary liquid chamber. In this manner, a partition member that partitions the main liquid chamber and the sub liquid chamber, and an annular ring that is separate from the partition member, are disposed between the cylindrical portion of the partition member and the second mounting member. A restricting passage member that constitutes at least a part of a restricting passage that communicates the main liquid chamber and the sub liquid chamber, and the cylindrical portion of the partition member is radially inward at a part in the circumferential direction. An evacuation part for evacuation is configured, and the restriction passage and the auxiliary liquid chamber are configured closer to the main liquid chamber side than the bottom part of the partition member, and an opening that is opened from the restriction passage toward the evacuation part. It is communicated through.

上記構成の防振装置では、仕切部材の底部が副液室側の端部に配置されている。したがって、筒部内には主液室が構成される。これにより、主振動の入力方向の弾性体と仕切部材との間のクリアランスを大きくすることができる。また、仕切部材の筒部には周方向の一部に径方向内側へ退避する退避部が構成されていて、制限通路と副液室とが、制限通路から退避部へ向かって開口された開口部を介して連通されている。開口部は、仕切部材の底部よりも主液室側に構成されている。したがって、ダイヤフラムの組付けや接着についての自由度を高めることができる。 In the vibration isolator having the above configuration, the bottom of the partition member is disposed at the end on the side of the sub liquid chamber. Accordingly, a main liquid chamber is formed in the cylindrical portion. Thereby, the clearance between the elastic body in the input direction of the main vibration and the partition member can be increased. Further, the cylindrical portion of the partition member is configured with a retraction portion that retreats radially inward in a part of the circumferential direction, and the restriction passage and the auxiliary liquid chamber are opened from the restriction passage toward the retraction portion. It communicates through the part. The opening is configured closer to the main liquid chamber than the bottom of the partition member. Accordingly, it is possible to increase the degree of freedom regarding the assembly and adhesion of the diaphragm.

本発明の請求項２に係る防振装置は、前記制限通路と前記主液室とが、前記筒部に構成された連通穴を介して連通されていること、を特徴とする。 The vibration isolator according to claim 2 of the present invention is characterized in that the restriction passage and the main liquid chamber communicate with each other through a communication hole formed in the cylindrical portion.

このように、筒部を用いて主液室と制限通路とを連通させる連通穴を構成することができる。 In this way, a communication hole that allows the main liquid chamber and the restriction passage to communicate with each other can be configured using the cylindrical portion.

本発明の請求項３に係る防振装置は、前記制限通路部材と前記代やダイヤフラムとが加硫接着されていること、を特徴とする。 The vibration isolator according to claim 3 of the present invention is characterized in that the restriction passage member and the margin or the diaphragm are vulcanized and bonded.

上記構成の防振装置では、制限通路と副液室とが、制限通路から径方向内側の退避部へ向かって開口された開口部を介して連通されている。したがって、ダイヤフラムを仕切部材の下面へ加硫接着することができる。 In the vibration isolator having the above-described configuration, the restriction passage and the auxiliary liquid chamber communicate with each other through an opening that opens from the restriction passage toward the evacuation portion on the radially inner side. Therefore, the diaphragm can be vulcanized and bonded to the lower surface of the partition member.

本発明の請求項４に係る防振装置は、前記仕切部材の前記底部の少なくとも一部が、弾性変形可能なメンブラン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 at least a part of the bottom portion of the partition member is made of an elastically deformable membrane.

このように、底部の一部を性変形可能なメンブランで構成することにより、所定の周波数の振動入力に対して減衰機能をもたせることができる。 In this way, by constituting a part of the bottom portion with a membrane that can be sexually deformed, it is possible to provide a damping function for vibration input of a predetermined frequency.

本発明の請求項５に係る防振装置は、前記制限通路部材が、前記第２取付部材の内周に沿って配置される外周部、前記外周部と連続して形成され前記仕切部材の前記鍔部と対向して配置される下面部、及び、前記下面部と連続して形成され前記外周部よりも軸方向が短尺とされ前記筒部の外周に沿って配置される内周部、を有していること、を特徴とする。 In the vibration isolator according to claim 5 of the present invention, the restriction passage member is formed continuously with the outer peripheral portion disposed along the inner periphery of the second attachment member, and the outer peripheral portion, and the partition member A lower surface portion that is disposed to face the flange portion, and an inner peripheral portion that is formed continuously with the lower surface portion and has a shorter axial direction than the outer peripheral portion and is disposed along the outer periphery of the cylindrical portion, It is characterized by having.

上記構成の制限通路部材は、外周部が第２取付部材の内周に沿って配置され、内周部が筒部の外周に沿って配置されて、制限通路を構成している。これにより、制限通路部材の先端面が第２取付部材、筒部に各々突き当てられて制限通路をシールするのではなく外周部、内周部の面を用いて制限通路をシールすることができる。したがって、シール部分の損傷を抑制することができる。 In the restriction passage member having the above configuration, the outer peripheral portion is disposed along the inner periphery of the second mounting member, and the inner peripheral portion is disposed along the outer periphery of the cylindrical portion, thereby constituting a restriction passage. Accordingly, the restriction passage member can be sealed using the surfaces of the outer peripheral portion and the inner peripheral portion, instead of sealing the restriction passage with the front end surface of the restriction passage member being abutted against the second mounting member and the cylindrical portion, respectively. . Therefore, damage to the seal portion can be suppressed.

また、内周部は外周部よりも軸方向が短尺とされているので、制限通路の断面積に関する自由度を高くすることができる。 Moreover, since the axial direction of the inner peripheral part is shorter than that of the outer peripheral part, the degree of freedom regarding the cross-sectional area of the restriction passage can be increased.

以上説明したように本発明によれば、コンパクトなサイズで主液室のストロークを確保することの可能な防振装置を提供することができる。 As described above, according to the present invention, it is possible to provide a vibration isolator capable of ensuring the stroke of the main liquid chamber with a compact size.

［第１実施形態］ [First Embodiment]

以下、本発明の第１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 a first embodiment of the present invention will be described with reference to the drawings.

図１には本発明の第１実施形態に係る防振装置１０が示されている。この防振装置１０は、自動車における振動発生部であるエンジンを振動受部である車体へ支持するエンジンマウントとして適用されるものである。 FIG. 1 shows a vibration isolator 10 according to a first embodiment of the present invention. The vibration isolator 10 is applied as an engine mount that supports an engine that is a vibration generating unit in an automobile to a vehicle body that is a vibration receiving unit.

図１に示されるように、防振装置１０は、外筒１２、及び、内側取付部材１４を備えている。 As shown in FIG. 1, the vibration isolator 10 includes an outer cylinder 12 and an inner attachment member 14.

外筒１２は、略円筒状とされ、中間部に段部１２Ｂが構成されている。外筒１２は、段部１２Ｂを挟んで、図中の上側が弾性体連結部１２Ａとされ、下側が弾性体連結部１２Ａよりも小径の仕切挟持部１２Ｃとされている。仕切挟持部１２Ｃの下端部には、径方向内側に加締められた加締め部１２Ｄが形成されている。外筒１２は、不図示のブランケットを介して、車体に連結される。 The outer cylinder 12 has a substantially cylindrical shape, and a step portion 12B is formed in the intermediate portion. In the outer cylinder 12, the upper side in the drawing is an elastic body connecting part 12A with the stepped part 12B interposed therebetween, and the lower side is a partition holding part 12C having a smaller diameter than the elastic body connecting part 12A. A crimping portion 12D that is crimped radially inward is formed at the lower end of the partition holding portion 12C. The outer cylinder 12 is connected to the vehicle body via a blanket (not shown).

内側取付部材１４は、外筒１２よりも小径の略円柱状とされ、上面中央部分から軸方向下側に向かって雌ねじが形成されたねじ穴１４Ａが構成されている。ねじ穴１４Ａには、エンジン側に連結される不図示のボルトが螺合される。 The inner mounting member 14 has a substantially cylindrical shape with a smaller diameter than the outer cylinder 12, and is configured with a screw hole 14 A in which a female screw is formed from the center portion of the upper surface toward the lower side in the axial direction. A bolt (not shown) connected to the engine side is screwed into the screw hole 14A.

内側取付部材１４は、外筒１２と同軸となるように下部が外筒１２の内側に配置されている。内側取付部材１４及び外筒１２の軸方向Ｓが、防振装置１０の軸方向となり、この方向に主振動が入力される。 The lower part of the inner mounting member 14 is disposed inside the outer cylinder 12 so as to be coaxial with the outer cylinder 12. The axial direction S of the inner mounting member 14 and the outer cylinder 12 becomes the axial direction of the vibration isolator 10, and the main vibration is input in this direction.

内側取付部材１４と外筒１２との間には、吸振主体となるゴム製の弾性体１６が配置されている。弾性体１６は、内側取付部材１４の外面に加硫接着されると共に、外筒１２の弾性体連結部１２Ａ及び段部１２Ｂに加硫接着されており、内側取付部材１４と外筒１２とを弾性的に連結している。 Between the inner mounting member 14 and the outer cylinder 12, a rubber elastic body 16 serving as a main vibration absorber is disposed. The elastic body 16 is vulcanized and bonded to the outer surface of the inner mounting member 14, and is also vulcanized and bonded to the elastic body connecting portion 12A and the stepped portion 12B of the outer cylinder 12, so that the inner mounting member 14 and the outer cylinder 12 are bonded together. It is elastically connected.

弾性体１６には、その下端部から下方へ延出する薄膜状の被覆部１８が一体的に形成されている。この被覆部１８は、外筒１２の仕切挟持部１２Ｃの内周面に加硫接着されて外筒１２の内壁を覆っている。被覆部１８の段部１２Ｂに対応する部分の下側には、段部１２Ｅが構成されている。この段部１２Ｅには、後述する仕切部材２０の鍔部２４が係合される。 The elastic body 16 is integrally formed with a thin film-like covering portion 18 extending downward from the lower end portion thereof. The covering portion 18 is vulcanized and bonded to the inner peripheral surface of the partition holding portion 12 C of the outer cylinder 12 to cover the inner wall of the outer cylinder 12. A step portion 12E is formed below the portion of the covering portion 18 corresponding to the step portion 12B. The step portion 12E is engaged with a flange portion 24 of a partition member 20 described later.

被覆部１８の内周側には、仕切部材２０及び制限通路部材３０が嵌め込まれている。仕切部材２０は、図２に示すように、ハット形状とされ、筒部２２、鍔部２４、及び、底部２６を備えている。 A partition member 20 and a restriction passage member 30 are fitted on the inner peripheral side of the covering portion 18. As shown in FIG. 2, the partition member 20 has a hat shape and includes a cylindrical portion 22, a flange portion 24, and a bottom portion 26.

筒部２２は、筒状とされ、図３にも示されるように、周方向の一部に径方向内側へ退避する退避部２２Ａが構成されている。退避部２２Ａは、径方向内側へ向かって凹状となるように構成され、制限通路部材３０との間に退避空間２２Ｒが構成されている。また、筒部２２には、退避部２２Ａと異なる位置に、連通穴２２Ｈが構成されている。連通穴２２Ｈは、後述する制限通路部材３０の連通穴３２と対応する位置に配置される。 The cylindrical portion 22 is formed in a cylindrical shape, and as shown in FIG. 3, a retracting portion 22 A that retracts radially inward is formed in a part of the circumferential direction. The retracting portion 22 A is configured to be concave inward in the radial direction, and a retracting space 22 R is configured between the retracting passage member 30. Further, a communication hole 22H is formed in the cylindrical portion 22 at a position different from the retracting portion 22A. The communication hole 22H is disposed at a position corresponding to a communication hole 32 of the restriction passage member 30 described later.

鍔部２４は、筒部２２の一端から径方向外側に延出して構成され、鍔形状とされている。底部２６は、筒部２２の他端から径方向内側に延出して構成されている。底部２６は、底部２６の外周部となり筒部２２と一体的に構成された枠部２７と、枠部２７の径方向内側に設けられたメンブラン２８とを備えている。メンブラン２８は、退避部２２Ａと向き合う部分が直線状とされ、他の外周が円弧状とされている。メンブラン２８は、ゴム、樹脂などの弾性変形可能な膜で構成されている。 The flange portion 24 is configured to extend radially outward from one end of the cylindrical portion 22 and has a flange shape. The bottom portion 26 is configured to extend radially inward from the other end of the cylindrical portion 22. The bottom portion 26 includes a frame portion 27 which is an outer peripheral portion of the bottom portion 26 and is configured integrally with the cylindrical portion 22, and a membrane 28 provided on the radially inner side of the frame portion 27. In the membrane 28, a portion facing the retracting portion 22A is linear, and the other outer periphery is arcuate. The membrane 28 is made of an elastically deformable film such as rubber or resin.

図４に示すように、制限通路部材３０は、仕切部材２０とは別部材とされている。制限通路部材３０は、環状とされており、図１に示すように、断面は開放部分が径方向外側向きのＵ字状とされている。制限通路部材３０の外径及び仕切部材２０の鍔部２４の外径は略同一とされ、これらの外径は、外筒１２の仕切挟持部１２Ｃよりも小径とされている。制限通路部材３０の内径は、筒部２２の外径よりも大径とされている。制限通路部材３０の中空部に仕切部材２０の筒部２２が挿通される。制限通路部材３０には、筒部２２の連通穴２２Ｈに対応する部分に連通穴３２が構成されている。 As shown in FIG. 4, the restriction passage member 30 is a separate member from the partition member 20. The restriction passage member 30 has an annular shape, and as shown in FIG. 1, the cross section has a U-shape with an open portion facing radially outward. The outer diameter of the restriction passage member 30 and the outer diameter of the flange portion 24 of the partition member 20 are substantially the same, and these outer diameters are smaller than the partition holding portion 12C of the outer cylinder 12. The inner diameter of the restriction passage member 30 is larger than the outer diameter of the cylindrical portion 22. The cylindrical portion 22 of the partition member 20 is inserted into the hollow portion of the restriction passage member 30. A communication hole 32 is formed in the restriction passage member 30 at a portion corresponding to the communication hole 22 H of the cylindrical portion 22.

制限通路部材３０には、制限通路部材３０の中空の一端側の開口を覆うように弾性膜状のダイヤフラム５０が加硫接着されている。図１、５に示すように、制限通路部材３０の内周面及び上端面は、ダイヤフラム５０と一体的に加硫形成された封入ゴム５２により覆われている。 An elastic membrane diaphragm 50 is vulcanized and bonded to the restriction passage member 30 so as to cover the opening at one end of the restriction passage member 30 that is hollow. As shown in FIGS. 1 and 5, the inner peripheral surface and the upper end surface of the restriction passage member 30 are covered with an encapsulating rubber 52 that is integrally vulcanized with the diaphragm 50.

仕切部材２０は、底部２６がダイヤフラム５０側となるように、制限通路部材３０の中空部に封入ゴム５２を介して圧入されている。封入ゴム５２により、仕切部材２０の筒部２２と制限通路部材３０の内周面との間が密着されている。図５に示すように、連通穴３２及び後述する開口部３６に対応する部分には、封入ゴム５２と一体的にリブ５４、隔壁５６が構成されている。リブ５４により、連通穴３２が、確実に密閉されている。また、隔壁５６により、後述するオリフィス３４の開口部３６側と連通穴３２側とが区画されている。 The partition member 20 is press-fitted through a sealed rubber 52 into the hollow portion of the restriction passage member 30 so that the bottom portion 26 is on the diaphragm 50 side. The sealed rubber 52 provides close contact between the cylindrical portion 22 of the partition member 20 and the inner peripheral surface of the restriction passage member 30. As shown in FIG. 5, ribs 54 and partition walls 56 are formed integrally with the encapsulating rubber 52 in portions corresponding to the communication holes 32 and the opening 36 described later. The communication hole 32 is reliably sealed by the rib 54. Moreover, the partition 56 divides an opening 36 side of the orifice 34 described later and the communication hole 32 side.

図１に示すように、仕切部材２０及び制限通路部材３０は、仕切部材２０の鍔部２４の外周端が段部１２Ｅに係合された状態で外筒１２の仕切挟持部１２Ｃの内側に嵌め込まれている。仕切挟持部１２Ｃの下端部１２Ｄは、径方向内側に加締められている。 As shown in FIG. 1, the partition member 20 and the restriction passage member 30 are fitted inside the partition holding portion 12 C of the outer cylinder 12 with the outer peripheral end of the flange portion 24 of the partition member 20 engaged with the stepped portion 12 E. It is. A lower end 12D of the partition holding portion 12C is crimped radially inward.

弾性体１６、外筒１２、及びダイヤフラム５０に囲まれた内側には、水、オイル、エチレングリコール等の液体が封入されて液室が構成されている。この液室は、仕切部材２０によって、主液室４０と副液室４２とに仕切られている。主液室４０は、仕切部材２０及び弾性体１６によって囲まれた空間で構成され、副液室４２は、仕切部材２０及びダイヤフラム５０によって囲まれた空間で構成されている。 Inside the elastic body 16, the outer cylinder 12, and the diaphragm 50, liquid such as water, oil, or ethylene glycol is sealed to form a liquid chamber. The liquid chamber is divided into a main liquid chamber 40 and a sub liquid chamber 42 by the partition member 20. The main liquid chamber 40 is configured by a space surrounded by the partition member 20 and the elastic body 16, and the sub liquid chamber 42 is configured by a space surrounded by the partition member 20 and the diaphragm 50.

仕切挟持部１２Ｃ内側を被覆する被覆部１８と、制限通路部材３０のＵ字の内側との間には、制限通路としてのオリフィス３４が構成されている。オリフィス３４は、連通穴３２及び連通穴２２Ｈで主液室４０と連通されている。また、オリフィス３４は、開口部３６で副液室４２と連通されている。これにより、主液室４０と副液室４２とがオリフィス３４を介して連通される。 An orifice 34 as a restriction passage is formed between the covering portion 18 that covers the inside of the partition holding portion 12 C and the inside of the U shape of the restriction passage member 30. The orifice 34 communicates with the main liquid chamber 40 through the communication hole 32 and the communication hole 22H. The orifice 34 communicates with the auxiliary liquid chamber 42 through the opening 36. As a result, the main liquid chamber 40 and the sub liquid chamber 42 communicate with each other via the orifice 34.

図１に示すように、開口部３６は、筒部２２の退避部２２Ａに対応する位置に構成され、退避部２２Ａに向かって径方向内側に開口されている。したがって、開口部３６は、仕切部材２０の底部２６よりも主液室４０側に配置されている。開口部３６は、退避空間２２Ｒを介して副液室４２と連通されている。 As shown in FIG. 1, the opening 36 is configured at a position corresponding to the retracting portion 22 A of the cylindrical portion 22, and is opened radially inward toward the retracting portion 22 A. Therefore, the opening 36 is disposed closer to the main liquid chamber 40 than the bottom 26 of the partition member 20. The opening 36 communicates with the auxiliary liquid chamber 42 through the retreat space 22R.

次に本実施の形態に係る防振装置１０の組立を説明する。 Next, assembly of the vibration isolator 10 according to the present embodiment will be described.

まず、図示しない金型内で、内側取付部材１４と外筒１２との間に弾性体１６を加硫接着すると共に、被覆部１８を形成する。また、これとは別に、金型を用いて、制限通路部材３０にダイヤフラム５０及び封入ゴム５２を加硫形成する。さらに、仕切部材２０にメンブラン２８を加硫形成する。 First, an elastic body 16 is vulcanized and bonded between the inner mounting member 14 and the outer cylinder 12 in a mold (not shown), and a covering portion 18 is formed. Separately from this, the diaphragm 50 and the encapsulated rubber 52 are vulcanized and formed on the restriction passage member 30 using a mold. Further, the membrane 28 is vulcanized and formed on the partition member 20.

次に、制限通路部材３０のダイヤフラム５０が形成されていない側へ、仕切部材２０を底部２６側から圧入し、筒部２２の外周及び鍔部２４の下面を制限通路部材３０の内周及び上端面に密着させる。このとき、制限通路部材３０の開口部３６と筒部２２の退避部２２Ａとが向き合うように配置し、開口部３６が退避空間２２Ｒと連通されるようにする。 Next, the partition member 20 is press-fitted from the bottom portion 26 side to the side of the restriction passage member 30 where the diaphragm 50 is not formed, and the outer periphery of the cylindrical portion 22 and the lower surface of the flange portion 24 are connected to the inner periphery and the upper portion of the restriction passage member 30. Adhere to the end face. At this time, the opening 36 of the restricting passage member 30 and the retracting portion 22A of the cylindrical portion 22 are arranged so as to face each other so that the opening 36 communicates with the retracting space 22R.

次に、前述のように一体化された内側取付部材１４、外筒１２、弾性体１６のセットと、仕切部材２０、制限通路部材３０、ダイヤフラム５０のセットと、内部に封入される液体中で組み付ける。組み付けは、仕切部材２０及び制限通路部材３０を外筒１２の下側から挿入し、仕切部材２０の鍔部２４の外周を段部１２Ｅに係合させ、外筒１２の下端部１２Ｄを径方向内側へ加締める。このようにして、防振装置１０の組立を行うことができる。 Next, the set of the inner mounting member 14, the outer cylinder 12, and the elastic body 16 integrated as described above, the set of the partition member 20, the restriction passage member 30, and the diaphragm 50, and the liquid sealed inside Assemble. For assembly, the partition member 20 and the restriction passage member 30 are inserted from the lower side of the outer cylinder 12, the outer periphery of the flange portion 24 of the partition member 20 is engaged with the step portion 12E, and the lower end portion 12D of the outer cylinder 12 is moved in the radial direction. Clamp inward. In this way, the vibration isolator 10 can be assembled.

次に、上記のように構成された本実施形態に係る防振装置１０の作用について説明する。 Next, the operation of the vibration isolator 10 according to the present embodiment configured as described above will be described.

防振装置１０では、エンジン又は車体側からの振動入力時に、吸振主体である弾性体１６が振動により弾性変形すると、この振動が弾性体１６によって減衰吸収される。 In the vibration isolator 10, when the elastic body 16, which is the main vibration absorber, is elastically deformed by vibration when vibration is input from the engine or the vehicle body side, the vibration is attenuated and absorbed by the elastic body 16.

また防振装置１０では、弾性体１６の変形により主液室４０の内容積が拡縮し、この主液室４０の拡縮に伴って主液室４０と副液室４２との間で液体がオリフィス３４を通して相互に流通する。このとき、比較的低い周波数域の振動、例えばシェイク振動等の入力時には、入力振動に共振して液体が主液室４０と副液室４２との間で流入及び流出する液柱共振が生じる。このとき、オリフィス３４内の空間に生ずる液体の圧力変化、液体流動の粘性抵抗等により振動エネルギが吸収されるので、防振装置１０では、特にシェイク振動等の比較的低い周波数域の振動については主液室４０、副液室４２間の液柱共振によって効果的に吸収できる。 Further, in the vibration isolator 10, the internal volume of the main liquid chamber 40 is expanded and contracted by the deformation of the elastic body 16, and the liquid is orificed between the main liquid chamber 40 and the sub liquid chamber 42 as the main liquid chamber 40 expands and contracts. 34 through each other. At this time, at the time of input of vibration in a relatively low frequency range, for example, shake vibration, liquid column resonance occurs in which liquid flows in and out between the main liquid chamber 40 and the sub liquid chamber 42 in resonance with the input vibration. At this time, vibration energy is absorbed by the change in pressure of the liquid generated in the space in the orifice 34, the viscous resistance of the liquid flow, and the like, so that the vibration isolator 10 is particularly sensitive to vibration in a relatively low frequency range such as shake vibration. The liquid can be effectively absorbed by the liquid column resonance between the main liquid chamber 40 and the sub liquid chamber 42.

またダイヤフラム５０は、主液室４０から副液室４２内への液体の流入時に外側へ膨出するように弾性変形することにより、副液室４２内の過度の液圧上昇を抑制する。これにより、副液室４２内の液圧上昇により主液室４０内から副液室４２内への液体の流入が抑制されることが防止される。 Further, the diaphragm 50 is elastically deformed so as to bulge outward when the liquid flows from the main liquid chamber 40 into the sub liquid chamber 42, thereby suppressing an excessive increase in the liquid pressure in the sub liquid chamber 42. Accordingly, it is possible to prevent the liquid from flowing from the main liquid chamber 40 into the sub liquid chamber 42 due to the increase in the liquid pressure in the sub liquid chamber 42.

一方、エンジンから比較的高い周波数域の振動、例えばアイドル振動等が入力する時には、オリフィス３４に目詰まりが発生して液柱共振により振動を吸収できなくなる。この時には、主液室４０内の液体へ伝達される高い周波数域の振動によりメンブラン２８が主液室４０内の容積を拡縮するように弾性変形する。これにより、主液室４０内の液圧上昇が抑制されることから、エンジンから比較的高い周波数域の振動が入力した時でも、主液室４０内の液体の液圧上昇に伴う動ばね定数の上昇を抑制できるので、高い周波数域の振動も効果的に吸収できる。 On the other hand, when vibrations in a relatively high frequency range, such as idle vibrations, are input from the engine, clogging occurs in the orifice 34 and vibrations cannot be absorbed by liquid column resonance. At this time, the membrane 28 is elastically deformed so as to expand and contract the volume in the main liquid chamber 40 by vibration in a high frequency range transmitted to the liquid in the main liquid chamber 40. As a result, an increase in the fluid pressure in the main fluid chamber 40 is suppressed, so that the dynamic spring constant associated with the increase in the fluid pressure of the liquid in the main fluid chamber 40 even when a relatively high frequency range vibration is input from the engine. Can suppress the vibration in a high frequency range.

本実施形態では、仕切部材２０の底部２６が副液室４２側に配置されているので、底部２６を主液室４０に配置した場合と比較して、主液室４０の軸方向Ｓのストロークを長くとることができる。したがって、防振装置のサイズを大きくすることなく、主液室４０の軸方向Ｓのストロークを確保することができる。 In the present embodiment, since the bottom portion 26 of the partition member 20 is disposed on the side of the secondary liquid chamber 42, the stroke of the main liquid chamber 40 in the axial direction S is compared with the case where the bottom portion 26 is disposed in the main liquid chamber 40. Can be taken longer. Therefore, the stroke of the main liquid chamber 40 in the axial direction S can be secured without increasing the size of the vibration isolator.

また、本実施形態では、仕切部材２０に退避部２２Ａを構成して、制限通路部材３０との間に退避空間２２Ｒを構成したので、この退避空間２２Ｒを用いて、オリフィス３４と副液室４２とを連通させることができ、制限通路部材３０の開口部３６を、軸方向Ｓで仕切部材２０の底部２６よりも主液室４０側に構成することができる。したがって、仕切部材２０とは別部材とされた制限通路部材３０へ、ダイヤフラム５０を容易に加硫形成することができる。 Further, in the present embodiment, the retreating portion 22A is formed on the partition member 20 and the retreat space 22R is formed between the restriction passage member 30 and the orifice 34 and the sub liquid chamber 42 using the retreat space 22R. And the opening 36 of the restriction passage member 30 can be configured in the axial direction S closer to the main liquid chamber 40 than the bottom 26 of the partition member 20. Therefore, the diaphragm 50 can be easily vulcanized and formed on the restricted passage member 30 that is a separate member from the partition member 20.

なお、本実施形態では、主液室４０とオリフィス３４との連通穴２２Ｈ、３２を、筒部２２、及び、制限通路部材３０の内周面に構成したが、当該連通穴は、鍔部２４及び制限通路部材３０の上端面に構成してもよい。 In the present embodiment, the communication holes 22H and 32 between the main liquid chamber 40 and the orifice 34 are configured on the inner peripheral surface of the cylindrical portion 22 and the restriction passage member 30, but the communication holes are formed on the flange portion 24. And you may comprise in the upper end surface of the restriction | limiting channel | path member 30. FIG.

また、本実施形態では、退避部２２Ａを凹状としたが、退避部は図６に示すように、筒部２２の外周方向の一部を直線状とした退避部２２Ｉのようにしてもよい。 In the present embodiment, the retracting portion 22A is concave, but the retracting portion may be a retracting portion 22I in which a part of the outer peripheral direction of the cylindrical portion 22 is linear as shown in FIG.

また、本実施形態では、メンブラン２８の形状を円形状で一部直線とされたものとしたが、図７に示すように三角形状のメンブラン２８Ａとしてもよいし、図８に示すように長方形状メンブラン２８Ｂとしてもよいし、図９に示すように退避部２２Ａと向き合う辺を直線状としたメンブラン２８Ｃとしてもよい。 Further, in the present embodiment, the shape of the membrane 28 is circular and partially straight, but it may be a triangular membrane 28A as shown in FIG. 7 or a rectangular shape as shown in FIG. The membrane 28B may be used, or as shown in FIG. 9, the membrane 28C may have a straight side that faces the retracting portion 22A.

［第２実施形態］ [Second Embodiment]

次に、本発明の第２実施形態について説明する。本実施形態では、第１実施形態と同様の部分については同一の符号を付して、その詳細な説明は省略する。 Next, a second embodiment of the present invention will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

第２実施形態の防振装置６０は、外筒１２、内側取付部材１４、弾性体１６、及び、仕切部材２０はを備えている。これらの部材は、第１実施形態と同一構成とされている。 The vibration isolator 60 according to the second embodiment includes the outer cylinder 12, the inner mounting member 14, the elastic body 16, and the partition member 20. These members have the same configuration as in the first embodiment.

図１０に示すように、制限通路部材６２は、仕切部材２０とは別部材とされている。制限通路部材６２は、環状とされており、断面は開放部分が軸方向Ｓの上側向きのＪ字状とされている。すなわち、制限通路部材６２は、仕切挟持部１２Ｃの内周に沿って配置される外周部６２Ａ、外周部６２Ａと連続して形成され鍔部２４と対向して配置される下面部６２Ｂ、及び、下面部６２Ｂと連続して形成され外周部６２Ａよりも軸方向Ｓが短尺とされ筒部２２の外周に沿って配置される内周部６２Ｃ、を有している。 As shown in FIG. 10, the restriction passage member 62 is a separate member from the partition member 20. The restricting passage member 62 has an annular shape, and the cross-section of the restricting passage member 62 is J-shaped with the open portion facing upward in the axial direction S. That is, the restricting passage member 62 includes an outer peripheral portion 62A disposed along the inner periphery of the partition holding portion 12C, a lower surface portion 62B formed continuously with the outer peripheral portion 62A and disposed opposite to the flange portion 24, and It has an inner peripheral portion 62 C that is formed continuously with the lower surface portion 62 B, has an axial direction S shorter than the outer peripheral portion 62 A, and is disposed along the outer periphery of the cylindrical portion 22.

制限通路部材６２の外径及び仕切部材２０の鍔部２４の外径は略同一とされ、これらの外径は、外筒１２の仕切挟持部１２Ｃよりも小径とされている。制限通路部材６２の内径は、筒部２２の外径よりも大径とされている。制限通路部材６２の中空部に仕切部材２０の筒部２２が挿通される。 The outer diameter of the restriction passage member 62 and the outer diameter of the flange portion 24 of the partition member 20 are substantially the same, and these outer diameters are smaller than the partition holding portion 12C of the outer cylinder 12. The inner diameter of the restriction passage member 62 is larger than the outer diameter of the cylindrical portion 22. The cylindrical portion 22 of the partition member 20 is inserted into the hollow portion of the restriction passage member 62.

制限通路部材６２には、制限通路部材６２の下面部６２Ｂ側の開口を覆うように弾性膜状のダイヤフラム５０が加硫接着されている。図１０に示すように、制限通路部材６２には、内周部６２Ｃの径方向内側を覆うようにシールゴム６４がダイヤフラム５０と一体的に加硫形成されている。また、内周部６２Ｃ、下面部６２Ｂ及び外周部６２Ａで囲まれた部分を埋めて、さらに、外周部６２Ａを内周面から上端にかけて覆うように、封入ゴム６６が、ダイヤフラム５０と一体的に加硫形成されている。 An elastic membrane diaphragm 50 is vulcanized and bonded to the restriction passage member 62 so as to cover the opening on the lower surface portion 62B side of the restriction passage member 62. As shown in FIG. 10, a sealing rubber 64 is integrally vulcanized with the diaphragm 50 so as to cover the radially inner side of the inner peripheral portion 62 C in the restriction passage member 62. The encapsulated rubber 66 is integrated with the diaphragm 50 so as to fill a portion surrounded by the inner peripheral portion 62C, the lower surface portion 62B, and the outer peripheral portion 62A, and to cover the outer peripheral portion 62A from the inner peripheral surface to the upper end. Vulcanized is formed.

仕切部材２０は、底部２６がダイヤフラム５０側となるように、制限通路部材６２の中空部にシールゴム６４を介して圧入されている。シールゴム６４により、仕切部材２０の筒部２２と制限通路部材３０の内周部６２Ｃとの間が密着されている。図１１に示すように、連通穴２２Ｈに対応する部分には、シールゴム６４及び封入ゴム６６と一体的に隔壁６７が構成されている。隔壁６７により、後述するオリフィス７０の連通穴２２Ｈ側と開口６８側とが区画されている。 The partition member 20 is press-fitted through a seal rubber 64 into the hollow portion of the restriction passage member 62 so that the bottom portion 26 is on the diaphragm 50 side. With the seal rubber 64, the cylindrical portion 22 of the partition member 20 and the inner peripheral portion 62 C of the restriction passage member 30 are in close contact with each other. As shown in FIG. 11, a partition wall 67 is formed integrally with the seal rubber 64 and the sealing rubber 66 at a portion corresponding to the communication hole 22 H. A partition wall 67 defines a communication hole 22H side and an opening 68 side of an orifice 70 described later.

仕切部材２０及び制限通路部材６２は、仕切部材２０の鍔部２４の外周端が段部１２Ｅに係合された状態で外筒１２の仕切挟持部１２Ｃの内側に嵌め込まれている。仕切挟持部１２Ｃの下端部１２Ｄは、径方向内側に加締められている。制限通路部材６２の外周部６２Ａは、被覆部１８と密着され、シールゴム６４は筒部２２と密着されている。 The partition member 20 and the restriction passage member 62 are fitted inside the partition holding portion 12C of the outer cylinder 12 with the outer peripheral end of the flange portion 24 of the partition member 20 engaged with the step portion 12E. A lower end 12D of the partition holding portion 12C is crimped radially inward. The outer peripheral portion 62 A of the restriction passage member 62 is in close contact with the covering portion 18, and the seal rubber 64 is in close contact with the cylindrical portion 22.

制限通路部材６２のＪ字の内側、仕切部材２０の筒部２２、及び、鍔部２４に囲まれた部分には、オリフィス７０が構成されている。オリフィス７０は、連通穴２２Ｈで主液室４０と連通されている。また、オリフィス７０は、開口６８で副液室４２と連通されている。これにより、主液室４０と副液室４２とがオリフィス７０を介して連通される。 An orifice 70 is formed on the inside of the J-shape of the restriction passage member 62, the portion surrounded by the cylindrical portion 22 and the flange portion 24 of the partition member 20. The orifice 70 communicates with the main liquid chamber 40 through the communication hole 22H. The orifice 70 communicates with the auxiliary liquid chamber 42 through the opening 68. As a result, the main liquid chamber 40 and the sub liquid chamber 42 communicate with each other through the orifice 70.

図１０に示すように、開口６８は、筒部２２の退避部２２Ａに対応する位置に構成され、退避部２２Ａに向かって径方向内側に開口されている。したがって、開口６８は、仕切部材２０の底部２６よりも主液室４０側に配置されている。開口６８は、退避空間２２Ｒを介して副液室４２と連通されている。 As shown in FIG. 10, the opening 68 is configured at a position corresponding to the retracting portion 22A of the cylindrical portion 22, and is opened radially inward toward the retracting portion 22A. Therefore, the opening 68 is disposed on the main liquid chamber 40 side with respect to the bottom portion 26 of the partition member 20. The opening 68 communicates with the auxiliary liquid chamber 42 via the retreat space 22R.

本実施形態の防振装置６０の組み立て、及び、作用については、第１実施形態と同様である。 The assembly and operation of the vibration isolator 60 according to the present embodiment is the same as in the first embodiment.

本実施形態の防振装置６０でも、第１実施形態と同様の効果を得ることができる。メンブラン２８及び、退避部２２Ａについては、第１実施形態で記載した変形例を用いることができる。 In the vibration isolator 60 of this embodiment, the same effect as that of the first embodiment can be obtained. The modification described in the first embodiment can be used for the membrane 28 and the retracting portion 22A.

なお、本実施形態では、制限通路部材６２の断面をＪ字形状としたが、図１２に示すようにＬ字形状とした制限通路部材６２Ｌとすることも、図１３に示すようにＵ字形状とした制限通路部材６２Ｕとすることもできる。 In the present embodiment, the restriction passage member 62 has a J-shaped cross section, but the restriction passage member 62L having an L shape as shown in FIG. 12 may be formed into a U shape as shown in FIG. The restricted passage member 62U may be used.

本実施形態では、特に、制限通路部材６２の断面をＪ字形状としたので、制限通路部材６２の内周部６２Ｃの径方向内側面と筒部２２とでシールゴム６４を介して両者の間をシールすることができる。したがって、Ｌ字形状とした場合のように、制限通路部材の先端部によってシールゴム６４が損傷を受けることを抑制することができる。また、面でシールすることができるので、シール部分の面積を広くしてより確実にシールすることができる。 In the present embodiment, in particular, since the cross section of the restricting passage member 62 is J-shaped, the radial inner surface 62C of the restricting passage member 62 and the cylindrical portion 22 are interposed between the two via the seal rubber 64. Can be sealed. Therefore, it is possible to prevent the seal rubber 64 from being damaged by the distal end portion of the restriction passage member as in the case of the L shape. Further, since the sealing can be performed on the surface, the area of the sealing portion can be widened and the sealing can be performed more reliably.

また、Ｕ字形状にした場合と比較して、制限通路部材のボリュームを少なくすることができると共に、オリフィスを構成する場合のデッドスペースを少なくすることができる。 In addition, the volume of the restriction passage member can be reduced and the dead space when the orifice is formed can be reduced as compared with the case of the U shape.

本発明の第１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 1st Embodiment of this invention. 本発明の第１実施形態に係る防振装置の仕切部材の構成を示す斜視図である。It is a perspective view which shows the structure of the partition member of the vibration isolator which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る防振装置の仕切部材の構成を示す上面図である。It is a top view which shows the structure of the partition member of the vibration isolator which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る防振装置の制限通路部材の構成を示す斜視図である。It is a perspective view which shows the structure of the restriction | limiting channel | path member of the vibration isolator which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る防振装置の制限通路部材とダイヤフラムの斜視図である。It is a perspective view of a restriction passage member and a diaphragm of a vibration isolator which concerns on a 1st embodiment of the present invention. 本発明の第１実施形態に係る防振装置の仕切部材の変形例を示す上面図である。It is a top view which shows the modification of the partition member of the vibration isolator which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る防振装置の仕切部材の他の変形例を示す上面図である。It is a top view which shows the other modification of the partition member of the vibration isolator which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る防振装置の仕切部材の他の変形例を示す上面図である。It is a top view which shows the other modification of the partition member of the vibration isolator which concerns on 1st Embodiment of this invention. 本発明の第１実施形態に係る防振装置の仕切部材の他の変形例を示す上面図である。It is a top view which shows the other modification of the partition member of the vibration isolator which concerns on 1st Embodiment of this invention. 本発明の第２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 2nd Embodiment of this invention. 本発明の第２実施形態に係る防振装置の制限通路部材とダイヤフラムの斜視図である。It is a perspective view of the restriction | limiting channel | path member and diaphragm of the vibration isolator which concerns on 2nd Embodiment of this invention. 本発明の第２実施形態に係る防振装置の制限通路部材の変形例を示す側面一部断面図である。It is side surface partial sectional drawing which shows the modification of the restriction | limiting channel | path member of the vibration isolator which concerns on 2nd Embodiment of this invention. 本発明の第２実施形態に係る防振装置の制限通路部材の他の変形例を示す側面一部断面図である。It is side surface partial sectional drawing which shows the other modification of the restriction | limiting channel | path member of the vibration isolator which concerns on 2nd Embodiment of this invention.

１０防振装置
１２外筒
１４内側取付部材
１６弾性体
２０仕切部材
２２Ｒ退避空間
２２Ａ退避部
２２Ｉ退避部
２２筒部
２２Ｈ連通穴
２４鍔部
２６底部
２７枠部
２８メンブラン
３０制限通路部材
３２連通穴
３４オリフィス
３６開口部
４０主液室
４２副液室
５０ダイヤフラム
５２封入ゴム
６０防振装置
６２制限通路部材
６２Ａ外周部
６２Ｂ下面部
６２Ｃ内周部
６２Ｌ制限通路部材
６２Ｕ制限通路部材
６４シールゴム
６６封入ゴム
６８開口
７０オリフィス
Ｓ軸方向 DESCRIPTION OF SYMBOLS 10 Vibration isolator 12 Outer cylinder 14 Inner attachment member 16 Elastic body 20 Partition member 22R Retraction space 22A Retraction part 22I Retraction part 22 Cylinder part 22H Communication hole 24 Gutter part 26 Bottom part 27 Frame part 28 Membrane 30 Restriction path member 32 Communication hole 34 Orifice 36 Opening 40 Main liquid chamber 42 Sub-fluid chamber 50 Diaphragm 52 Enclosed rubber 60 Vibration isolator 62 Restricted passage member 62A Outer peripheral portion 62B Lower surface portion 62C Inner peripheral portion 62L Restricted passage member 62U Restricted passage member 64 Seal rubber 66 Enclosed rubber 68 Opening 70 Orifice S Axial direction

Claims

振動発生部及び振動受け部の一方に連結される第１取付部材と、
筒状とされ、主振動の入力方向に筒軸方向が沿うように振動発生部及び振動受け部の他方に連結される第２取付部材と、
前記第１取付部材と第２取付部材との間に配設され、両者を連結する弾性体と、
前記弾性体を隔壁の一部として前記第２取付部材の内側に構成され、液体が封入された主液室と、
液体が封入され、隔壁の少なくとも一部がダイヤフラムにより形成されて拡縮可能とされた副液室と、
筒状の筒部、前記筒部の一端から径方向外側に連続して構成される鍔部、及び、前記筒部の他端に構成される底部と、を有し、前記鍔部の外周が前記第２取付部材の内周に沿い、前記底部が前記副液室側に配置されるようにして前記主液室と前記副液室との間を仕切る仕切部材と、
前記仕切部材と別体の環状とされ、前記仕切部材の筒部と前記第２取付部材との間に配置され、前記主液室と前記副液室とを連通させる制限通路の少なくとも一部を構成する制限通路部材と、
を備え、
前記仕切部材の筒部には周方向の一部に径方向内側へ退避する退避部が構成され、前記制限通路と前記副液室とが、前記仕切部材の底部よりも前記主液室側に構成され前記制限通路から前記退避部へ向かって開口された開口部を介して連通されている、防振装置。 A first attachment member coupled to one of the vibration generating portion and the vibration receiving portion;
A second mounting member that is cylindrical and is coupled to the other of the vibration generating portion and the vibration receiving portion so that the direction of the cylinder axis is along the input direction of the main vibration;
An elastic body disposed between the first mounting member and the second mounting member and connecting the two;
A main liquid chamber that is configured inside the second mounting member with the elastic body as a part of a partition, and in which a liquid is enclosed;
A sub-liquid chamber in which liquid is enclosed, and at least a part of the partition wall is formed by a diaphragm and can be expanded and contracted;
A cylindrical tube portion, a flange portion that is continuously formed radially outward from one end of the tube portion, and a bottom portion that is configured at the other end of the tube portion, and the outer periphery of the flange portion is A partition member that partitions the main liquid chamber and the sub liquid chamber along the inner periphery of the second mounting member so that the bottom portion is disposed on the sub liquid chamber side;
The partition member and the separate annular ring are disposed between the partition member cylindrical portion and the second mounting member, and at least a part of a restriction passage communicating the main liquid chamber and the sub liquid chamber is formed. A limiting passage member to be configured;
With
The tubular portion of the partition member includes a retraction portion that retreats radially inward in a part of the circumferential direction, and the restriction passage and the sub liquid chamber are located closer to the main liquid chamber side than the bottom of the partition member. An anti-vibration device configured and communicated through an opening that opens from the restriction passage toward the retracting portion.

前記制限通路と前記主液室とが、前記筒部に構成された連通穴を介して連通されていること、を特徴とする請求項１に記載の防振装置。 2. The vibration isolator according to claim 1, wherein the restriction passage and the main liquid chamber are communicated with each other through a communication hole formed in the cylindrical portion.

前記制限通路部材と前記ダイヤフラムとが加硫接着されていること、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 vibration isolator according to claim 1 or 2, wherein the restriction passage member and the diaphragm are vulcanized and bonded.

前記仕切部材の前記底部の少なくとも一部は、弾性変形可能なメンブランで構成されていること、を特徴とする請求項１〜請求項３のいずれか１項に記載の防振装置。 The vibration isolator according to any one of claims 1 to 3, wherein at least a part of the bottom portion of the partition member is formed of an elastically deformable membrane.

前記制限通路部材は、前記第２取付部材の内周に沿って配置される外周部、前記外周部と連続して形成され前記仕切部材の前記鍔部と対向して配置される下面部、及び、前記下面部と連続して形成され前記外周部よりも軸方向が短尺とされ前記筒部の外周に沿って配置される内周部、を有していること、を特徴とする請求項１〜請求項４のいずれか１項に記載の防振装置。 The restriction passage member includes an outer peripheral portion disposed along an inner periphery of the second mounting member, a lower surface portion formed continuously with the outer peripheral portion and disposed to face the flange portion of the partition member, and 2. An inner peripheral portion that is formed continuously with the lower surface portion, has an axial direction shorter than the outer peripheral portion, and is disposed along the outer periphery of the cylindrical portion. The vibration isolator according to any one of claims 4 to 5.