JP2011099465A

JP2011099465A - Vibration control device

Info

Publication number: JP2011099465A
Application number: JP2009252886A
Authority: JP
Inventors: Hiroshi Kojima; 宏小島
Original assignee: Bridgestone Corp
Current assignee: Bridgestone Corp
Priority date: 2009-11-04
Filing date: 2009-11-04
Publication date: 2011-05-19

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device capable of restraining a partition forming a part of a liquid chamber from moving, and deteriorating. SOLUTION: A diaphragm 30 is provided nearer to a male screw 12A side than to an upper elastic wall 18 of an inside mounting member 12. The diaphragm 30 is shaped of a substantially disk-like membrane, the radially inner side thereof is adhered to the outer periphery of the inside mounting member 12, and a reinforcement fitting 32 is adhered to the outer peripheral end in the radial direction. A balance chamber 54 is formed between the diaphragm 30 and the upper elastic wall 18. The upper elastic wall 18 is disposed between second pressure receiving liquid chambers 52A, 52B and the balance chamber 54. COPYRIGHT: (C)2011,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の振動を吸収して車体等の振動受部への振動伝達を防止する液体封入式の防振装置に関するものである。 The present invention is used as an engine mount or the like in general industrial machines and automobiles, and absorbs vibration from a vibration generating part of an engine or the like to prevent vibration transmission to a vibration receiving part of a vehicle body or the like. It is about.

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遮断する。このような防振装置としては、装置内部に弾性体及び主液室及び副液室が設けられると共に、これらの液室が制限通路を通して互いに連通し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、弾性体の吸振作用及び、一対の液室間を連通するオリフィス内を流通する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, Shut off vibration transmission to the car body. As such a vibration isolator, an elastic body, a main liquid chamber, and a sub liquid chamber are provided inside the apparatus, and a liquid sealed type in which these liquid chambers communicate with each other through a restriction passage is known. According to this liquid-filled vibration isolator, when vibration is generated when the mounted engine is operated, the vibration absorbing action of the elastic body and the liquid flowing through the orifice communicating between the pair of liquid chambers Absorbs vibration with viscous resistance, etc., and suppresses vibration transmission to the vehicle body.

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。この特許文献１に記載の防振装置は、軸方向に並ぶ主液室１６及び副液室１７を備え、さらに、軸方向と直交する方向に並ぶ２つの第１、第２側部液室１０１、１０２を備えている。特許文献１記載の防振装置では、主液室１６と副液室１７が第１オリフィス８０で連通され、２つの第１、第２側部液室１０１、１０２同士が互いに第２オリフィス９６で連通されている。そして、副液室１７と第１、第２側部液室１０１、１０２は、主液室１６を挟んで軸方向の一方側と他方側に配置されている。 As a conventional liquid-filled vibration isolator, for example, there is one as shown in Patent Document 1. The vibration isolator described in Patent Document 1 includes a main liquid chamber 16 and a sub liquid chamber 17 arranged in the axial direction, and two first and second side liquid chambers 101 arranged in a direction orthogonal to the axial direction. , 102. In the vibration isolator described in Patent Document 1, the main liquid chamber 16 and the sub liquid chamber 17 are communicated with each other by a first orifice 80, and the two first and second side liquid chambers 101 and 102 are mutually connected by a second orifice 96. It is communicated. The auxiliary liquid chamber 17 and the first and second side liquid chambers 101 and 102 are disposed on one side and the other side in the axial direction with the main liquid chamber 16 interposed therebetween.

特許文献１に記載の防振装置では、軸方向に振動が作用すると、第１オリフィス８０を通って作動液が主液室１６と副液室１７間を流れ、軸直角方向の振動が作用すると、第２オリフィス９６を通って第１、第２側部液室１０１、１０２間を作動液が流れる。この作動液の流通により、軸方向、軸直方向の振動に対する防振効果が発揮されている。 In the vibration isolator described in Patent Document 1, when vibration is applied in the axial direction, hydraulic fluid flows between the main liquid chamber 16 and the sub liquid chamber 17 through the first orifice 80, and vibration in a direction perpendicular to the axis is applied. The working fluid flows between the first and second side liquid chambers 101 and 102 through the second orifice 96. Due to the circulation of the hydraulic fluid, an anti-vibration effect against axial and axial vibrations is exhibited.

ところで、特許文献１に記載の防振装置では、軸直角方向に並ぶ液室と主液室との間の隔壁は、吸振主体である弾性体で構成されている。一方、軸直角方向に並ぶ液室の主液室と逆側の隔壁（上隔壁）は、外部に露出され、吸振主体である弾性体よりも厚みが薄くなっている。したがって、エンジンからの熱などにより上隔壁の劣化が進んだり、厚みが薄いために安易に上隔壁が変形して第１、第２側部液室１０１、１０２、の特性に影響が出てチューニングが難しくなったりする、などの問題を含んでいる。 By the way, in the vibration isolator described in Patent Document 1, the partition between the liquid chamber and the main liquid chamber aligned in the direction perpendicular to the axis is made of an elastic body that is a main component of vibration absorption. On the other hand, the partition wall (upper partition wall) on the opposite side to the main liquid chamber of the liquid chambers arranged in the direction perpendicular to the axis is exposed to the outside and is thinner than the elastic body that is the main vibration absorber. Therefore, the upper partition wall deteriorates due to heat from the engine, etc., or because the thickness is thin, the upper partition wall is easily deformed, affecting the characteristics of the first and second side liquid chambers 101 and 102, and tuning. It has problems such as becoming difficult.

特開２００６−１３２６４０号公報JP 2006-132640 A

本発明は、上記事実を考慮して成されたものであり、液室の一部を構成する隔壁の動きを抑制すると共に、劣化を抑制可能な防振装置を提供することを目的とする。 The present invention has been made in consideration of the above-described facts, and an object thereof is to provide a vibration isolator capable of suppressing the movement of a partition wall constituting a part of a liquid chamber and suppressing deterioration.

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部の一方に連結された内側取付部材と、振動発生部及び振動受部の他方に連結され、主振動入力方向からみて、前記内側取付部材の外側を囲むように配置された外側取付部材と、前記内側取付部材と前記外側取付部材との間に配置され、前記内側取付部材と前記外側取付部材とを弾性的に連結する弾性体と、前記外側取付部材の内側で、前記内側取付部材の主振動入力方向一端側に構成され、内壁の少なくとも一部が前記弾性体により形成され、液体が充填された第１受圧液室と、前記外側取付部材と前記内側取付部材の間に構成されると共に、前記第１受圧液室との間が前記弾性体で区画され、前記第１受圧液室と逆側に上弾性壁で閉鎖されて、液体が充填された第２受圧液室と、前記内側取付部材と前記外側取付部材との間に配置されて前記第２受圧液室を前側受圧液室と後側受圧液室に仕切る仕切部材と、前記第２受圧液室を挟んで主振動入力方向で前記第１受圧液室と逆側に構成され、隔壁の一部がダイヤフラムにより形成されて内部に液体が充填され、この液体の液圧変化に応じて内容積が拡縮可能とされた平衡室と、前記第１受圧液室と前記平衡室とを互いに連通させて液体を流通可能とする第１制限通路と、を備え、前記ダイヤフラム、前記弾性体、前記上弾性壁、及び、前記仕切部材は、前記内側取付部材に、一体的に形成されている。 In order to achieve the above object, a vibration isolator according to claim 1 of the present invention is connected to an inner mounting member connected to one of a vibration generating part and a vibration receiving part, and to the other of the vibration generating part and the vibration receiving part. The outer mounting member disposed so as to surround the outer side of the inner mounting member as viewed from the main vibration input direction, and the inner mounting member and the outer mounting are disposed between the inner mounting member and the outer mounting member. An elastic body for elastically connecting a member; and on the inner side of the outer mounting member, at one end side in the main vibration input direction of the inner mounting member, at least a part of the inner wall is formed by the elastic body, and the liquid is The first pressure receiving liquid chamber is configured between the filled first pressure receiving liquid chamber, the outer mounting member and the inner mounting member, and the first pressure receiving liquid chamber is partitioned by the elastic body. And the liquid is closed with an elastic wall on the opposite side A filled second pressure receiving liquid chamber; a partition member disposed between the inner mounting member and the outer mounting member and partitioning the second pressure receiving liquid chamber into a front pressure receiving liquid chamber and a rear pressure receiving liquid chamber; The second pressure receiving liquid chamber is sandwiched between the first pressure receiving liquid chamber in the main vibration input direction, a part of the partition wall is formed by a diaphragm, and the inside is filled with a liquid. And an equilibrium chamber whose internal volume can be expanded and contracted, and a first restricting passage that allows the liquid to flow through the first pressure receiving liquid chamber and the equilibrium chamber, the diaphragm, the elastic The body, the upper elastic wall, and the partition member are integrally formed with the inner mounting member.

請求項１の防振装置では、内側取付部、外側取付部材の何れか一方に振動発生部側から振動が入力すると、この入力振動により内側取付部材と外側取付部材の間に配置された弾性体が弾性変形し、この弾性体の内部摩擦等に基づく吸振作用によって振動が吸収され、振動受け部側へ伝達される振動が低減される。このとき、入力振動が主振動方向の振動であっても、この主振動と略直交する方向の振動であっても弾性体の吸振作用により、その一部が吸収される。 In the vibration isolator according to claim 1, when vibration is input to either the inner mounting portion or the outer mounting member from the vibration generating portion side, the elastic body disposed between the inner mounting member and the outer mounting member by the input vibration. Is elastically deformed, and the vibration is absorbed by the vibration absorbing action based on the internal friction or the like of the elastic body, so that the vibration transmitted to the vibration receiving portion side is reduced. At this time, even if the input vibration is a vibration in the main vibration direction or a vibration in a direction substantially orthogonal to the main vibration, a part of the vibration is absorbed by the vibration absorbing action of the elastic body.

また、主振動方向に振動が入力すると、弾性体の弾性変形により第１受圧液室が拡縮して第１制限通路を通じて第１受圧液室と平衡室との間で液体が相互に流通する。そして、第１制限通路内での液柱共振等により、制振機能が発揮される。 When vibration is input in the main vibration direction, the first pressure receiving liquid chamber expands and contracts due to elastic deformation of the elastic body, and the liquid flows between the first pressure receiving liquid chamber and the equilibrium chamber through the first restriction passage. And a damping function is exhibited by liquid column resonance etc. in the 1st restriction passage.

一方、主振動方向と略直交する方向の振動が入力すると、内側取付部材と外側取付部材の相対移動により、これらの間に構成されている第２受圧液室が拡縮し、第２受圧液室と平衡室とが連通されている場合には、これらの液室の間で液体が相互に流通する。また、仕切部材によって仕切られた第２受圧液室の前側受圧液室と後側受圧液室との間が連通されている場合には、これらの液室の間で液体が相互に流通する。この液体流通による液柱共振等により、制振機能が発揮される。 On the other hand, when vibration in a direction substantially orthogonal to the main vibration direction is input, the second pressure receiving liquid chamber formed between the inner mounting member and the outer mounting member expands and contracts due to relative movement of the inner mounting member and the outer mounting member. And the equilibrium chamber communicate with each other, the liquid flows between these liquid chambers. Further, when the front pressure receiving liquid chamber and the rear pressure receiving liquid chamber of the second pressure receiving liquid chamber partitioned by the partition member are in communication, the liquid flows between these liquid chambers. The vibration damping function is exhibited by the liquid column resonance caused by the liquid flow.

本発明では、平衡室が第２受圧液室を挟んで主振動入力方向で第１受圧液室と逆側に構成されているので、第２受圧液室の上弾性壁は、平衡室により保護され、外部に露出されている場合と比較して、熱やオゾンの影響を受けにくく、劣化を抑制することができる。 In the present invention, since the equilibrium chamber is configured on the opposite side of the first pressure receiving fluid chamber in the main vibration input direction across the second pressure receiving fluid chamber, the upper elastic wall of the second pressure receiving fluid chamber is protected by the equilibrium chamber. Compared with the case where it is exposed to the outside, it is less affected by heat and ozone and can suppress deterioration.

また、上弾性壁は、平衡室に充填された液体の液圧により安易な変形が抑制され、上弾性壁の歪み、劣化を抑制することができる。また、軸方向、前後方向の振動入力時において、第２受圧液の平衡室側への拡張が抑制されるため、減衰の損失が低減し高い減衰力を確保することができる。 Further, the upper elastic wall can be prevented from being easily deformed by the liquid pressure of the liquid filled in the equilibrium chamber, and the upper elastic wall can be prevented from being distorted and deteriorated. Further, since the expansion of the second pressure-receiving liquid to the equilibrium chamber side is suppressed when the vibration is input in the axial direction and the front-rear direction, the loss of attenuation is reduced and a high damping force can be secured.

また、ダイヤフラム、弾性体、上弾性壁、及び、仕切部材を一体的に形成することにより、これらを一工程で容易に製造することができ、組み付けも容易に行うことができる。なお、ここでの一体的な形成は、例えば、ダイヤフラム、弾性体、上弾性壁、及び、仕切部材を、一度の加硫処理により内側取付部材に加硫成形することにより形成したり、樹脂を射出して形成したりすることができる。また、ダイヤフラムを樹脂で形成し、弾性体、上弾性壁、及び、仕切部材をゴムで成形するなどの２色成形により形成することもできる。 Further, by integrally forming the diaphragm, the elastic body, the upper elastic wall, and the partition member, these can be easily manufactured in one step, and the assembly can be easily performed. The integral formation here is, for example, formed by vulcanization molding of the diaphragm, the elastic body, the upper elastic wall, and the partition member into the inner mounting member by a single vulcanization process, or by resin. It can be formed by injection. Alternatively, the diaphragm may be formed of a resin, and the elastic body, the upper elastic wall, and the partition member may be formed of two colors such as rubber.

請求項２に記載の防振装置は、前記平衡室と、前記前受圧液室及び前記後受圧液室の各々とを、互いに連通させて液体を流通可能とする第２制限通路、を備えている。 The vibration isolator according to claim 2 includes a second restriction passage that allows the liquid to flow through the equilibrium chamber and each of the front pressure receiving liquid chamber and the rear pressure receiving liquid chamber that are in communication with each other. Yes.

上記構成の防振装置によれば、前記前受圧液室及び前記後受圧液室と平衡室との間の液圧差により第２制限通路を液体が移動し、制振効果を得ることができる。 According to the vibration isolator having the above-described configuration, the liquid moves in the second restricting passage due to the hydraulic pressure difference between the front pressure receiving liquid chamber, the rear pressure receiving liquid chamber, and the equilibrium chamber, and a vibration damping effect can be obtained.

請求項３に記載の防振装置は、前記前受圧液室と前記後受圧液室とを互いに連通させて液体を流通可能とする第３制限通路、を備えている。 According to a third aspect of the present invention, the vibration isolator includes a third restriction passage that allows the liquid to flow through the front pressure receiving liquid chamber and the rear pressure receiving liquid chamber.

上記構成の防振装置によれば、前記前受圧液室と前記後受圧液室の相互拡縮により、第３制限通路を液体が移動し、制振効果を得ることができる。 According to the vibration isolator having the above-described configuration, the liquid moves in the third restriction passage by the mutual expansion and contraction of the front pressure receiving liquid chamber and the rear pressure receiving liquid chamber, and a vibration damping effect can be obtained.

請求項４に記載の防振装置は、前記第１制限通路の少なくとも一部が、前記仕切部材の径方向外側に構成されていること、を特徴とする。 The vibration isolator according to claim 4 is characterized in that at least a part of the first restricting passage is configured on the radially outer side of the partition member.

第１受圧液室と平衡室とを第１制限通路で連通させる場合、両者の間に第２受圧液室が配置されているが、第２受圧液室を仕切る仕切部材の径方向外側に第１制限通路を構成すれば、第２受圧液室を跨いで第１制限通路を配置することなく、別部材なしで第１制限通路を構成することができる。 When the first pressure receiving liquid chamber and the equilibrium chamber are communicated with each other through the first restriction passage, the second pressure receiving liquid chamber is disposed between the two, but the second pressure receiving liquid chamber is disposed radially outward of the partition member that partitions the second pressure receiving liquid chamber. If the first restriction passage is configured, the first restriction passage can be formed without a separate member without disposing the first restriction passage across the second pressure receiving liquid chamber.

請求項５に記載の防振装置は、前記ダイヤフラムが、前記上弾性壁よりも耐熱性の高い材料で形成されていること、を特徴とする。 The vibration isolator according to claim 5 is characterized in that the diaphragm is formed of a material having higher heat resistance than the upper elastic wall.

ダイヤフラムは、一方面が外部に露出しているので、上弾性壁よりもエンジン等の熱の影響を受けやすい。そこで、ダイヤフラムは、上記のように、上弾性壁よりも耐熱性の高い材料で形成されていることが好ましい。 Since one side of the diaphragm is exposed to the outside, the diaphragm is more susceptible to heat from the engine or the like than the upper elastic wall. Therefore, the diaphragm is preferably formed of a material having higher heat resistance than the upper elastic wall as described above.

請求項６に記載の防振装置は、前記ダイヤフラムが、前記上弾性壁よりも耐オゾン性の高い材料で形成されていること、を特徴とする。 The vibration isolator according to claim 6 is characterized in that the diaphragm is formed of a material having higher ozone resistance than the upper elastic wall.

ダイヤフラムは、一方面が外部に露出しているので、上弾性壁よりも外気の影響を受けやすい。そこで、ダイヤフラムは、上記のように、上弾性壁よりも耐オゾン性の高い材料で形成されていることが好ましい。 Since one side of the diaphragm is exposed to the outside, it is more susceptible to outside air than the upper elastic wall. Therefore, the diaphragm is preferably formed of a material having higher ozone resistance than the upper elastic wall as described above.

請求項７に記載の防振装置は、前記外側取付部材は前記主振動入力方向に沿った筒軸を有する筒状とされ、前記ダイヤフラムは、前記外側取付部材側へ取り付けられる径方向外側の外部と、前記内側取付部材に接着された径方向内側の内部を有し、前記主振動入力方向と直交する方向からみて、前記外側取付部材への組み付け前に前記内部から径方向外側へ向かって前記上弾性壁と離れる方向に延出するように構成されると共に、前記外側取付部材への組み付け後に前記外部が前記外側取付部材への組み付け前よりも前記上弾性壁と近づくように構成されていること、を特徴とする。
このように、ダイヤフラムを構成することにより、ダイヤフラムを一体成形する際に、容易に型抜きを行うことができる。 The vibration isolator according to claim 7, wherein the outer mounting member has a cylindrical shape having a cylindrical shaft along the main vibration input direction, and the diaphragm is attached to the outer mounting member side on the outer side in the radial direction. And having a radially inner interior bonded to the inner mounting member, and viewed from the inside toward the radially outer side before assembly to the outer mounting member, as viewed from a direction orthogonal to the main vibration input direction. It is comprised so that it may extend in the direction away from an upper elastic wall, and it is comprised so that the said exterior may approach the said upper elastic wall after the assembly | attachment to the said outer attachment member rather than the assembly | attachment to the said outer attachment member. It is characterized by this.
In this way, by configuring the diaphragm, it is possible to easily perform die cutting when integrally forming the diaphragm.

以上説明したように本発明の防振装置によれば、液室の一部を構成する上弾性壁の動きを抑制することができると共に、上弾性壁の劣化を抑制することができる。また、ダイヤフラム、弾性体、上弾性壁、及び、仕切部材を一体的に形成することにより、これらを一工程で容易に製造することができ、組み付けも容易に行うことができる。 As described above, according to the vibration isolator of the present invention, it is possible to suppress the movement of the upper elastic wall constituting a part of the liquid chamber and to suppress the deterioration of the upper elastic wall. Further, by integrally forming the diaphragm, the elastic body, the upper elastic wall, and the partition member, these can be easily manufactured in one step, and the assembly can be easily performed.

本発明の実施形態に係る防振装置の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of the vibration isolator which concerns on embodiment of this invention. 本発明の実施形態に係る防振装置の構成を示す、図１から９０度回転した側面断面図である。It is side surface sectional drawing rotated 90 degree | times from FIG. 1 which shows the structure of the vibration isolator which concerns on embodiment of this invention. 図７、図８に示される防振装置のＡ−Ａ切断線に沿った断面図である。It is sectional drawing along the AA cutting line of the vibration isolator shown by FIG. 7, FIG. 図７、図８に示される防振装置のＢ−Ｂ切断線に沿った断面図である。It is sectional drawing along the BB cutting line of the vibration isolator shown by FIG. 7, FIG. 図７、図８に示される防振装置のＣ−Ｃ切断線に沿った断面図である。FIG. 9 is a cross-sectional view of the vibration isolator shown in FIGS. 7 and 8 along the line CC. 本発明の実施形態に係る防振装置の分解した状態の側面断面図である。It is side surface sectional drawing of the state which the vibration isolator which concerns on embodiment of this invention decomposed | disassembled. 本発明の実施形態に係る防振装置の外側取付部材を取り去った状態の側面図である。It is a side view of the state which removed the outer side attachment member of the vibration isolator which concerns on embodiment of this invention. 本発明の実施形態に係る防振装置の外側取付部材を取り去った状態の側面図で、図７の逆側からみた側面図である。It is a side view of the state which removed the outer side attachment member of the vibration isolator which concerns on embodiment of this invention, and the side view seen from the reverse side of FIG. 本発明の実施形態の変形例に係る防振装置の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of the vibration isolator which concerns on the modification of embodiment of this invention. 本発明の実施形態の他の変形例に係る防振装置の構成を示す側面断面図である。It is side surface sectional drawing which shows the structure of the vibration isolator which concerns on the other modification of embodiment of this invention. 本発明の実施形態に係る防振装置の構成を示す、図１０から９０度回転した側面断面図である。It is side surface sectional drawing rotated 90 degree | times from FIG. 10 which shows the structure of the vibration isolator which concerns on embodiment of this invention.

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

図１には本発明の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、自動車のエンジンを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。なお、図中の符号Ｓは装置の軸心を示し、この軸心に沿った方向を装置の軸方向Ｓとし、図の上下方向を防振装置１０の上下方向として以下の説明を行う。防振を目的とする主たる振動（主振動）は、軸方向Ｓに入力される。 FIG. 1 shows a vibration isolator 10 according to an embodiment of the present invention. The vibration isolator 10 is applied as an engine mount that supports an automobile engine on a vehicle body. Note that the symbol S in the figure indicates the axis of the apparatus, the direction along the axis is the axis direction S of the apparatus, and the vertical direction in the figure is the vertical direction of the vibration isolator 10 in the following description. Main vibration (main vibration) for the purpose of vibration isolation is input in the axial direction S.

図１に示されるように、防振装置１０は、内側取付部材１２、外側取付部材１４、弾性体１６、上弾性壁１８、仕切弾性壁２０、中間部材２２、及び、ダイヤフラム３０を備えている。 As shown in FIG. 1, the vibration isolator 10 includes an inner attachment member 12, an outer attachment member 14, an elastic body 16, an upper elastic wall 18, a partition elastic wall 20, an intermediate member 22, and a diaphragm 30. .

外側取付部材１４は、有底円筒形状とされ、カシメ部１４Ａ、外周部１４Ｂ、及び、底部１４Ｃを備えている。カシメ部１４Ａは、開口側の端部に構成されている。外周部１４Ｂは、円筒状とされ、防振装置１０の外周を構成している。カシメ部１４Ａは、外周部１４Ｂよりも大径部分を有し、カシメ部１４Ａと外周部１４Ｂとの間には段差Ｄが構成されている。底部１４Ｃは、外周部１４Ｂの一端側を閉鎖するように配置されている。外側取付部材１４は、金属材料で構成することができる。 The outer mounting member 14 has a bottomed cylindrical shape, and includes a caulking portion 14A, an outer peripheral portion 14B, and a bottom portion 14C. The caulking portion 14A is configured at an end portion on the opening side. The outer peripheral portion 14 B is cylindrical and constitutes the outer periphery of the vibration isolator 10. The caulking portion 14A has a larger diameter portion than the outer peripheral portion 14B, and a step D is formed between the caulking portion 14A and the outer peripheral portion 14B. The bottom portion 14C is disposed so as to close one end side of the outer peripheral portion 14B. The outer mounting member 14 can be made of a metal material.

外側取付部材１４の外周部１４Ｂには、複数の脚部材１３が固定されている。脚部材１３には、取付穴１３Ａが構成されている。脚部材１３は、不図示のボルトが取付穴１３Ａに挿通され、ボルト締めにより車体側に連結される。外側取付部材１４は、脚部材１３を介して、車体と連結されている。 A plurality of leg members 13 are fixed to the outer peripheral portion 14 B of the outer mounting member 14. The leg member 13 has an attachment hole 13A. The leg member 13 has a bolt (not shown) inserted into the mounting hole 13A and is connected to the vehicle body side by bolting. The outer mounting member 14 is connected to the vehicle body via the leg member 13.

内側取付部材１２は、略円柱状とされ、外側取付部材１４と同軸的に、かつ、軸方向Ｓで一部が外側取付部材１４よりも外側に突出するように配置されている。内側取付部材１２の外側取付部材１４から外側へ突出された一端部には、雄ネジ部１２Ａが構成されている。内側取付部材１２は、雄ネジ部１２Ａが不図示のエンジン側ブラケットに連結されることにより、エンジン（不図示）と連結されている。内側取付部材１２の他端１２Ｂ側は、外側取付部材１４の円筒部１４Ｂの内側に配置されている。 The inner mounting member 12 has a substantially columnar shape, is coaxial with the outer mounting member 14, and is disposed so that a part of the inner mounting member 12 protrudes outside the outer mounting member 14 in the axial direction S. A male screw portion 12 A is formed at one end of the inner mounting member 12 that protrudes outward from the outer mounting member 14. The inner mounting member 12 is connected to an engine (not shown) by connecting the male screw portion 12A to an engine-side bracket (not shown). The other end 12 B side of the inner attachment member 12 is disposed inside the cylindrical portion 14 B of the outer attachment member 14.

中間部材２２は、略円筒形状とされ、上フランジ部２２Ａ、中間部２２Ｂ、及び、下フランジ部２２Ｃを備えている。中間部２２Ｂは、筒状とされ、一対の左右開口部２４Ａ、左右開口部２４Ａと並ぶ周方向に構成された一対の連通開口２４Ｂ、及び、後述する第１オリフィス３４の一端に対応する下開口２４Ｃが構成されている。上フランジ部２２Ａは、中間部２２Ｂの内側取付部材１２側に配置され、下フランジ部２２Ｃは、中間部２２Ｂの上フランジ部２２Ａと逆側に配置されている。中間部材２２は、外側取付部材１４の内側に嵌め込まれ、下フランジ部２２Ｃが底部１４Ｃに当接され、上フランジ部２２Ａが後述する補強金具３２と共にカシメ部１４Ａでカシメ固定されている。 The intermediate member 22 has a substantially cylindrical shape, and includes an upper flange portion 22A, an intermediate portion 22B, and a lower flange portion 22C. The intermediate portion 22B has a cylindrical shape, a pair of left and right openings 24A, a pair of communication openings 24B configured in the circumferential direction aligned with the left and right openings 24A, and a lower opening corresponding to one end of a first orifice 34 described later. 24C is configured. The upper flange portion 22A is disposed on the inner mounting member 12 side of the intermediate portion 22B, and the lower flange portion 22C is disposed on the opposite side of the upper flange portion 22A of the intermediate portion 22B. The intermediate member 22 is fitted inside the outer mounting member 14, the lower flange portion 22 C is in contact with the bottom portion 14 C, and the upper flange portion 22 A is caulked and fixed by a caulking portion 14 A together with a reinforcing metal fitting 32 described later.

弾性体１６は、ゴム材料で構成され、内側取付部材１２と中間部材２２との間に配置されている。弾性体１６は、軸方向Ｓからみて円形とされ、底部１４Ｃと対向する面が凹状とされている。弾性体１６は、内側が内側取付部材１２の他端１２Ｂの外周及び端面に加硫接着されると共に、径方向外側端部が中間部材２２の左右開口部２４Ａよりも下フランジ部２２Ｃ側の内周面に加硫接着されている。 The elastic body 16 is made of a rubber material and is disposed between the inner mounting member 12 and the intermediate member 22. The elastic body 16 is circular when viewed from the axial direction S, and the surface facing the bottom portion 14C is concave. The elastic body 16 is vulcanized and bonded to the outer periphery and end face of the other end 12B of the inner mounting member 12 at the inner side, and the radially outer end portion is located on the inner side of the intermediate member 22 on the lower flange portion 22C side than the left and right opening portions 24A. It is vulcanized and bonded to the peripheral surface.

上弾性壁１８は、ゴム材料で構成され、内側取付部材１２と中間部材２２との間で弾性体１６よりも内側取付部材１２の軸方向Ｓの中央側に配置されている。上弾性壁１８は、略円板状とされ、内側が内側取付部材１２の外周に加硫接着されると共に、径方向外側端部が中間部材２２の左右開口部２４Ａよりも上フランジ部２２Ａ側の内周面に加硫接着されている。弾性体１６と上弾性壁１８の間には、左右開口部２４Ａに対応する位置に、径方向外側に開口する一対の凹部１７が構成されている。上弾性壁１８の仕切弾性壁２０の各々に対応する部分の外周側には、各々連通口１８Ａ（図２、４参照）が構成されている。 The upper elastic wall 18 is made of a rubber material, and is disposed between the inner mounting member 12 and the intermediate member 22 on the center side in the axial direction S of the inner mounting member 12 with respect to the elastic body 16. The upper elastic wall 18 has a substantially disc shape, and the inner side is vulcanized and bonded to the outer periphery of the inner mounting member 12, and the outer end in the radial direction is closer to the upper flange portion 22 A than the left and right openings 24 A of the intermediate member 22. Is vulcanized and bonded to the inner peripheral surface of Between the elastic body 16 and the upper elastic wall 18, a pair of recesses 17 are formed at positions corresponding to the left and right openings 24 A and open radially outward. A communication port 18A (see FIGS. 2 and 4) is formed on the outer peripheral side of the portion of the upper elastic wall 18 corresponding to each of the partition elastic walls 20.

図２に示すように、仕切弾性壁２０は、ゴム材料で構成され、中間部材２２の左右開口部２４Ａが構成されていない部分で、弾性体１６と上弾性壁１８との間に配置されている。仕切弾性壁２０は、図４に示すように、内側が内側取付部材１２の外周に加硫接着され、外側端部が中間部材２２の内周面に加硫接着されて、一対の左右開口部２４Ａを仕切るように配置されている。仕切弾性壁２０の外端面上部の連通口１８Ａに対応する部分の各々には、連通口２０Ａが構成されている（図２参照）。連通口１８Ａと連通口２０Ａとにより、後述する第１オリフィス３４が平衡室５４に連通されている。 As shown in FIG. 2, the partition elastic wall 20 is made of a rubber material, and is disposed between the elastic body 16 and the upper elastic wall 18 at a portion where the left and right openings 24 A of the intermediate member 22 are not formed. Yes. As shown in FIG. 4, the partition elastic wall 20 is vulcanized and bonded to the outer periphery of the inner mounting member 12, and the outer end is vulcanized and bonded to the inner peripheral surface of the intermediate member 22. It arrange | positions so that 24A may be partitioned off. A communication port 20A is formed in each of the portions corresponding to the communication port 18A on the upper outer end surface of the partition elastic wall 20 (see FIG. 2). A first orifice 34 to be described later is communicated with the equilibrium chamber 54 through the communication port 18A and the communication port 20A.

弾性体１６、上弾性壁１８、及び、仕切弾性壁２０は、一体的に構成されており、金型を用いて加硫成形することができる。 The elastic body 16, the upper elastic wall 18, and the partition elastic wall 20 are integrally formed and can be vulcanized using a mold.

中間部材２２の外周面側には、第１ゴム部２５、第２ゴム部２６、第３ゴム部２７、上下ゴム部２８、及び、押さえゴム部２９が、弾性体１６、上弾性壁１８、及び、仕切弾性壁２０と一体的に形成されている。第１ゴム部２５は、上フランジ部２２Ａの下側に略１周に亘って形成されている。第２ゴム部２６は、中間部材２２の中間部分に略１周に亘って形成されている。第３ゴム部２７は、左右開口部２４Ａよりも下中間部、第２ゴム部２６、及び、第３ゴム部２７は、下フランジ部２２Ｃの上側に略１周に亘って形成されている。第２ゴム部２６と第３ゴム部２７は、仕切弾性壁２０の一方に対応する部分で上下ゴム部２８により連結されている。上下ゴム部２８には、軸方向Ｓに沿った溝部２８Ｃが構成されている。押さえゴム部２９は、仕切弾性壁２０の他方に対応する部分で第１ゴム部２５と第２ゴム部２６とが向き合う方向に突出されると共に離間部２９Ａが構成されている。第１ゴム部２５側の突出部には、連通口２０Ａと連通される溝部２５Ａが構成されている。 On the outer peripheral surface side of the intermediate member 22, the first rubber portion 25, the second rubber portion 26, the third rubber portion 27, the upper and lower rubber portions 28, and the pressing rubber portion 29 are provided with the elastic body 16, the upper elastic wall 18, And it is formed integrally with the partition elastic wall 20. The first rubber part 25 is formed over the entire circumference of the lower side of the upper flange part 22A. The second rubber portion 26 is formed in the intermediate portion of the intermediate member 22 over substantially one circumference. The third rubber part 27 is formed over the entire circumference of the lower intermediate part, the second rubber part 26, and the third rubber part 27 above the lower flange part 22C rather than the left and right opening parts 24A. The second rubber portion 26 and the third rubber portion 27 are connected by the upper and lower rubber portions 28 at a portion corresponding to one of the partition elastic walls 20. The upper and lower rubber portions 28 are formed with groove portions 28C along the axial direction S. The presser rubber part 29 protrudes in a direction in which the first rubber part 25 and the second rubber part 26 face each other at a part corresponding to the other side of the partition elastic wall 20 and constitutes a separation part 29A. A groove 25A that communicates with the communication port 20A is formed on the protruding portion on the first rubber portion 25 side.

第１ゴム部２５、第２ゴム部２６、第３ゴム部２７、上下ゴム部２８、及び、押さえゴム部２９は、外周面が外側取付部材１４の内周面に圧着され、シール部材としての機能を発揮している。外側取付部材１４は、中間部材２２を介して、弾性体１６、上弾性壁１８、仕切弾性壁２０、に固定され、内側取付部材１２と連結されている。 The first rubber part 25, the second rubber part 26, the third rubber part 27, the upper and lower rubber parts 28, and the pressing rubber part 29 are pressure-bonded to the inner peripheral surface of the outer mounting member 14 and serve as seal members. It is functioning. The outer mounting member 14 is fixed to the elastic body 16, the upper elastic wall 18, and the partition elastic wall 20 via the intermediate member 22, and is connected to the inner mounting member 12.

弾性体１６の内側取付部材１２と逆側には、第１受圧液室５０が構成されている。第１受圧液室５０は、弾性体１６、中間部材２２、及び、外側取付部材１４の底部１４Ｃに囲まれて構成されている。第１受圧液室５０には、液体が充填されている。充填する液体としては、エチレングリコール、シリコンオイル等の液体を用いることができる。 A first pressure receiving fluid chamber 50 is configured on the opposite side of the elastic body 16 from the inner mounting member 12. The first pressure receiving fluid chamber 50 is configured to be surrounded by the elastic body 16, the intermediate member 22, and the bottom portion 14 C of the outer mounting member 14. The first pressure receiving liquid chamber 50 is filled with liquid. As the liquid to be filled, a liquid such as ethylene glycol or silicon oil can be used.

凹部１７には、弾性体１６、上弾性壁１８、仕切弾性壁２０、及び後述するオリフィス部材４０に囲まれて、前受圧液室５２Ａ、後受圧液室５２Ｂが構成されている。第２受圧液室５２Ａ、５２Ｂにも、第１受圧液室５０と同様に液体が充填されている。前受圧液室５２Ａと後受圧液室５２Ｂとは、仕切弾性壁２０で仕切られ、各々独立した液室とされている。 The concave portion 17 is surrounded by an elastic body 16, an upper elastic wall 18, a partition elastic wall 20, and an orifice member 40 described later, thereby forming a front pressure receiving liquid chamber 52A and a rear pressure receiving liquid chamber 52B. Similarly to the first pressure-receiving liquid chamber 50, the second pressure-receiving liquid chambers 52A and 52B are filled with liquid. The pre-pressure receiving liquid chamber 52A and the post-pressure receiving liquid chamber 52B are partitioned by the partition elastic wall 20 and are independent liquid chambers.

内側取付部材１２の上弾性壁１８よりも雄ネジ部１２Ａ側には、ダイヤフラム３０が設けられている。ダイヤフラム３０は、略円板形の膜状とされ、径方向内側の内部３０Ａが内側取付部材１２の外周に接着され、径方向の外周端である外部３０Ｂに補強金具３２が接着されている。ダイヤフラム３０は、図６に示すように、外側取付部材１４に組み付けられる前の状態では、径方向内側から外側に向けて、軸方向Ｓで上弾性壁１８から遠ざかるように（径方向外側に向かって開口が大きくなるように）湾曲形成されている。すなわち、外側取付部材１４へカシメ固定する前の状態では、補強金具３２と中間部材２２の上フランジ部２２Ａとが離間するように構成されている。 A diaphragm 30 is provided on the male screw portion 12A side of the upper elastic wall 18 of the inner mounting member 12. The diaphragm 30 has a substantially disk-like film shape, and a radially inner portion 30A is bonded to the outer periphery of the inner mounting member 12, and a reinforcing metal fitting 32 is bonded to an outer portion 30B that is a radially outer peripheral end. As shown in FIG. 6, the diaphragm 30 is in a state before being assembled to the outer mounting member 14 so as to move away from the upper elastic wall 18 in the axial direction S from the radially inner side to the outer side (toward the radially outer side). So that the opening becomes larger). That is, the reinforcing metal fitting 32 and the upper flange portion 22 A of the intermediate member 22 are configured to be separated from each other before being caulked and fixed to the outer mounting member 14.

ダイヤフラム３０は、後述する平衡室５４内の液圧変化に応じて平衡室５４内の圧力が大気圧に近くなるように変位可能な、弾性膜で構成されている。弾性膜は、例えば、ゴム材で構成することができ、この場合には、ダイヤフラム３０を、弾性体１６、上弾性壁１８、仕切弾性壁２０と一体的に加硫成形することができる。また、ダイヤフラム３０は、弾性変形可能な樹脂材料、例えば、ＥＲＤＭやブチルゴムなどの樹脂材料で構成することもできる。この場合には、ダイヤフラム３０を、弾性体１６、上弾性壁１８、仕切弾性壁２０と２色成形により一体的に構成することができる。 The diaphragm 30 is configured by an elastic film that can be displaced so that the pressure in the equilibrium chamber 54 is close to atmospheric pressure in accordance with a change in hydraulic pressure in the equilibrium chamber 54 described later. The elastic film can be made of, for example, a rubber material. In this case, the diaphragm 30 can be integrally vulcanized with the elastic body 16, the upper elastic wall 18, and the partition elastic wall 20. Moreover, the diaphragm 30 can also be comprised with resin materials which can be elastically deformed, for example, resin materials, such as ERDM and butyl rubber. In this case, the diaphragm 30 can be integrally formed with the elastic body 16, the upper elastic wall 18, and the partition elastic wall 20 by two-color molding.

補強金具３２は、組み付け前の状態からダイヤフラム３０を変形させることによって上弾性壁１８側へ近づけられて上フランジ部２２Ａと当接される位置に配置され、上フランジ部２２Ａと共に外側取付部材１４のカシメ部１４Ａでカシメられ、外側取付部材１４の内周側に固定される。ダイヤフラム３０と上弾性壁１８との間には、平衡室５４が構成される。平衡室５４には、液体が充填され、液圧変化に応じてダイヤフラム３０が変位することにより、平衡室５４内が拡縮可能とされている。平衡室５４に充填する液体としても、エチレングリコール、シリコンオイル等の液体を用いることができる。平衡室５４は、外側取付部材１４の上部内側空間に構成される。 The reinforcing metal fitting 32 is disposed at a position where it is brought closer to the upper elastic wall 18 side by deforming the diaphragm 30 from the state before assembly and is brought into contact with the upper flange portion 22A, and the outer mounting member 14 together with the upper flange portion 22A. It is crimped by the crimping portion 14 A and is fixed to the inner peripheral side of the outer mounting member 14. An equilibrium chamber 54 is configured between the diaphragm 30 and the upper elastic wall 18. The equilibrium chamber 54 is filled with a liquid, and the diaphragm 30 is displaced according to a change in the hydraulic pressure, so that the inside of the equilibrium chamber 54 can be expanded and contracted. As the liquid filled in the equilibrium chamber 54, a liquid such as ethylene glycol or silicon oil can be used. The equilibrium chamber 54 is configured in the upper inner space of the outer mounting member 14.

平衡室５４内の液体の液圧により、上弾性壁１８の安易な動きを抑制することができる。また、上弾性壁１８は、前受圧液室５２Ａ、後受圧液室５２Ｂと、平衡室５４との間に配置されて外気に露出されていないので、エンジン等からの熱の影響や、オゾンの影響を受けにくく、劣化を抑制することができる。 Easy movement of the upper elastic wall 18 can be suppressed by the liquid pressure of the liquid in the equilibrium chamber 54. The upper elastic wall 18 is disposed between the front pressure receiving fluid chamber 52A, the rear pressure receiving fluid chamber 52B, and the equilibrium chamber 54 and is not exposed to the outside air. It is hard to be affected and can suppress deterioration.

なお、ダイヤフラム３０は、外気に露出され、かつ膜状で厚みが薄いため、上弾性壁１８よりも耐熱性の高い材料で形成することが好ましい。また、ダイヤフラム３０は、外気に露出され、かつ膜状で厚みが薄いため、上弾性壁１８よりも耐オゾン性の高い材料で形成することが好ましい。例えば、上弾性壁１８をゴム材料で形成するのであれば、ダイヤフラム３０をＥＲＤＭやブチルゴムなどの樹脂で構成することが好ましい。 The diaphragm 30 is preferably made of a material having higher heat resistance than the upper elastic wall 18 because the diaphragm 30 is exposed to the outside air and is film-like and thin. In addition, the diaphragm 30 is preferably formed of a material having higher ozone resistance than the upper elastic wall 18 because it is exposed to the outside air and has a film shape and a small thickness. For example, if the upper elastic wall 18 is formed of a rubber material, the diaphragm 30 is preferably made of a resin such as ERDM or butyl rubber.

中間部材２２と外側取付部材１４との間には、図３にも示されているように、第２ゴム部２８と第３ゴム部２９とを上下壁とする流路３１が構成されている。流路３１は、中間部材２２の外側をほぼ１周して、溝部２８Ｃと連通されている。流路３１と溝部２８Ｃとで構成される流路を第１オリフィス３４とする。第１オリフィス３４により、第１受圧液室５０と平衡室５４とが連通されている。 Between the intermediate member 22 and the outer mounting member 14, as shown in FIG. 3, a flow path 31 having the second rubber portion 28 and the third rubber portion 29 as upper and lower walls is formed. . The flow path 31 communicates with the groove portion 28 C substantially once around the outer side of the intermediate member 22. A flow path composed of the flow path 31 and the groove 28 C is referred to as a first orifice 34. The first orifice 34 communicates the first pressure receiving liquid chamber 50 and the equilibrium chamber 54.

第１ゴム部２６と第２ゴム部２８との間には、オリフィス部材４０が嵌め込まれている。オリフィス部材４０は、断面コ字状の弧状とされ、中間部材２２の左右開口部２４Ａの各々に対応する位置に周方向に沿って一対が配置されている。オリフィス部材４０の各々には、図７に示すように連通口４０Ａが構成されている。オリフィス部材４０と中間部材２２に囲まれて、一対の第２オリフィス４２が構成されている。図８に示すように、一対の第２オリフィス４２は、仕切弾性壁２０に対応する位置の離間部２９Ａで合流し、連通口２０Ａ及び連通口１８Ａから平衡室５４に連通されている。 An orifice member 40 is fitted between the first rubber part 26 and the second rubber part 28. The orifice member 40 has an arc shape with a U-shaped cross section, and a pair is disposed along the circumferential direction at a position corresponding to each of the left and right openings 24A of the intermediate member 22. Each orifice member 40 has a communication port 40A as shown in FIG. A pair of second orifices 42 is constituted by being surrounded by the orifice member 40 and the intermediate member 22. As shown in FIG. 8, the pair of second orifices 42 merge at a separation portion 29 A at a position corresponding to the partition elastic wall 20, and communicate with the equilibrium chamber 54 through the communication port 20 A and the communication port 18 A.

弾性体１６は、外側取付部材１４又は内側取付部材１２を介して軸方向Ｓに沿った荷重が入力すると、軸方向Ｓに沿って弾性変形すると共に第１受圧液室５０の内容積を主として変化（拡縮）させる。また、弾性体１６は、外側取付部材１４又は内側取付部材１２を介して径方向のうち、内側取付部材１２と前受圧液室５２Ａ、後受圧液室５２Ｂの配列方向に沿った荷重が入力すると、径方向に沿って弾性変形すると共に前受圧液室５２Ａ、後受圧液室５２Ｂの内容積を主として変化（拡縮）させる。またダイヤフラム３０は、平衡室５４内の液圧変化に応じて軸方向Ｓに沿って変形することにより、平衡室５４の液圧変化が抑制されるように内容積を変化（拡縮）させる。 When a load along the axial direction S is input via the outer mounting member 14 or the inner mounting member 12, the elastic body 16 is elastically deformed along the axial direction S and mainly changes the internal volume of the first pressure receiving liquid chamber 50. (Enlarge / reduce). The elastic body 16 receives a load along the arrangement direction of the inner mounting member 12, the front pressure receiving fluid chamber 52A, and the rear pressure receiving fluid chamber 52B in the radial direction via the outer mounting member 14 or the inner mounting member 12. In addition, the inner pressure volume of the front pressure receiving liquid chamber 52A and the rear pressure receiving liquid chamber 52B is mainly changed (expanded) while being elastically deformed along the radial direction. Further, the diaphragm 30 is deformed along the axial direction S in accordance with the change in the hydraulic pressure in the equilibrium chamber 54, thereby changing (expanding / reducing) the internal volume so that the change in the hydraulic pressure in the equilibrium chamber 54 is suppressed.

一方、第１オリフィス３４は、第１受圧液室５０と平衡室５４との間で液体を相互に流通可能としている。また、第２オリフィス４２の一方は、前受圧液室５２Ａと平衡室５４との間で液体を相互に流通可能とし、第２オリフィス４２の他方は、後ろ受圧液室５２Ｂと平衡室５４との間で液体を相互に流通可能とている。 On the other hand, the first orifice 34 allows the liquid to flow between the first pressure receiving liquid chamber 50 and the equilibrium chamber 54. In addition, one of the second orifices 42 allows fluid to flow between the front pressure receiving liquid chamber 52A and the equilibrium chamber 54, and the other of the second orifices 42 is between the rear pressure receiving liquid chamber 52B and the equilibrium chamber 54. It is possible to distribute liquid between each other.

ここで、第１オリフィス３４は、その路長及び断面積がシェイク振動の周波数（例えば、８〜１２Ｈｚ）の振動に適合するようにチューニングされ、また第２オリフィス４２は、その路長及び断面積がシェイク振動よりも若干、低い周波数（例えば、６〜１０Ｈｚ）の振動に適合するようにチューニングされている。 Here, the first orifice 34 is tuned so that its path length and cross-sectional area match vibrations of the frequency of shake vibration (for example, 8 to 12 Hz), and the second orifice 42 has its path length and cross-sectional area. Are tuned to fit vibrations of slightly lower frequency (eg, 6-10 Hz) than shake vibrations.

次に、防振装置１０の製造方法について説明する。
まず、内側取付部材１２、補強金具３２、及び、中間部材２２を金型内にセットし、金型内に未加硫ゴムを注入し、加硫処理を行って、ダイヤフラム３０、上弾性壁１８、仕切弾性壁２０、弾性体１６、第１ゴム部２５、第２ゴム部２６、第３ゴム部２７、上下ゴム部２８、及び、押さえゴム部２９を一体的に形成する。なお、ダイヤフラム３０を樹脂材で構成する場合には、２色成形用の金型を用いて、一体的に形成する。ここで形成された部材を、本体部１１とする（図６参照）。 Next, a method for manufacturing the vibration isolator 10 will be described.
First, the inner mounting member 12, the reinforcing metal fitting 32, and the intermediate member 22 are set in a mold, unvulcanized rubber is injected into the mold, and vulcanization is performed, so that the diaphragm 30, the upper elastic wall 18 and the like. The partition elastic wall 20, the elastic body 16, the first rubber part 25, the second rubber part 26, the third rubber part 27, the upper and lower rubber parts 28, and the pressing rubber part 29 are integrally formed. When the diaphragm 30 is made of a resin material, it is integrally formed using a two-color molding die. Let the member formed here be the main-body part 11 (refer FIG. 6).

次に、本体部１１の第１ゴム部２５と第２ゴム部２６の間に、オリフィス部材４０を嵌め込み、本体部１１及びオリフィス部材４０を、外側取付部材１４内に嵌め込む。このとき、下フランジ部２２Ｃが底部１４Ｃに当接するように、上フランジ部２２Ａがカシメ部１４Ａと外周部１４Ｂとの間の段差Ｄに当接するようにする。この嵌め込み作業は、内部に充填する液体を用意し、この液体中で行う。これにより、第１受圧液室５０、前受圧液室５２Ａ、後受圧液室５２Ｂ、第１オリフィス３４、及び第２オリフィス４２に、液体を充填することができる。 Next, the orifice member 40 is fitted between the first rubber portion 25 and the second rubber portion 26 of the main body 11, and the main body 11 and the orifice member 40 are fitted into the outer mounting member 14. At this time, the upper flange portion 22A is in contact with the step D between the caulking portion 14A and the outer peripheral portion 14B so that the lower flange portion 22C is in contact with the bottom portion 14C. This fitting operation is performed in a liquid prepared in the interior. Thereby, the first pressure receiving liquid chamber 50, the front pressure receiving liquid chamber 52A, the rear pressure receiving liquid chamber 52B, the first orifice 34, and the second orifice 42 can be filled with liquid.

そして、前記液体中でダイヤフラム３０を変形させつつ補強金具３２を上フランジ部２２Ａに重ね、カシメ部１４Ａの先端を径方向内側へ折り曲げて、外側取付部材１４を径方向内側へ加締める。このようにして、防振装置１０を製造することができる。 Then, while deforming the diaphragm 30 in the liquid, the reinforcing bracket 32 is overlapped on the upper flange portion 22A, the tip of the caulking portion 14A is bent inward in the radial direction, and the outer mounting member 14 is crimped inward in the radial direction. In this way, the vibration isolator 10 can be manufactured.

本実施形態の防振装置１０は、ダイヤフラム３０が、上弾性壁１８を挟んで弾性体１６と逆側に設けられ、内側取付部材１２に接着されているので、ダイヤフラム３０を、弾性体１６、上弾性壁１８、仕切弾性壁２０等と共に、一度の加硫成形（樹脂材の場合には２色成形）により、成形することができる。したがって、ダイヤフラム３０のみを形成するための製造工程や、ダイヤフラム３０を組み付けるための別部材が不要となり、製造を簡略化できると共に、製造コストも抑制することができる。 In the vibration isolator 10 of the present embodiment, the diaphragm 30 is provided on the opposite side to the elastic body 16 with the upper elastic wall 18 interposed therebetween, and is bonded to the inner mounting member 12. Along with the upper elastic wall 18, the partition elastic wall 20, and the like, it can be molded by a single vulcanization molding (two-color molding in the case of a resin material). Therefore, a manufacturing process for forming only the diaphragm 30 and a separate member for assembling the diaphragm 30 are not required, and the manufacturing can be simplified and the manufacturing cost can be suppressed.

また、組み付け前にダイヤフラム３０は、径方向外側の外部３０Ｂ側が上弾性壁１８から離れるように（径方向外側が開くように）構成されているので、一体成形時における型抜きを容易に行うことができる。 In addition, since the diaphragm 30 is configured so that the outer side 30B on the outer side in the radial direction is separated from the upper elastic wall 18 before assembly (ie, the outer side in the radial direction is opened), it is easy to perform die-cutting during integral molding. Can do.

さらに、組み付け前のダイヤフラム３０を、径方向外側の外部３０Ｂ側が上弾性壁１８から離れるように（径方向外側が開くように）構成し、ダイヤフラム３０を変形させて外側取付部材１４内に組み付けることにより、径方向の長さを確保したダイヤフラム３０を容易に構成することができる。このように、ダイヤフラム３０の径方向の長さを確保することにより、ダイヤフラム３０の変位に対する耐久性を向上させることができる。 Further, the diaphragm 30 before assembly is configured such that the outer side 30B on the outer side in the radial direction is separated from the upper elastic wall 18 (the outer side in the radial direction is opened), and the diaphragm 30 is deformed and assembled in the outer mounting member 14. Thus, the diaphragm 30 having a sufficient length in the radial direction can be easily configured. Thus, by ensuring the length of the diaphragm 30 in the radial direction, durability against displacement of the diaphragm 30 can be improved.

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の作用を説明する。防振装置１０では、内側取付部材１２に連結されたエンジンが作動すると、エンジンからの振動が内側取付部材１２を介して弾性体１６に伝達される。このとき、弾性体１６は吸振主体として作用し、弾性体１６の変形に伴った内部摩擦等による吸振作用により入力振動が吸収される。 Next, the operation of the vibration isolator 10 according to the present embodiment configured as described above will be described. In the vibration isolator 10, when the engine connected to the inner mounting member 12 is operated, vibration from the engine is transmitted to the elastic body 16 via the inner mounting member 12. At this time, the elastic body 16 acts as a vibration absorbing main body, and the input vibration is absorbed by the vibration absorbing action due to internal friction or the like accompanying the deformation of the elastic body 16.

このとき、エンジンから入力する主要な振動としては、例えば、エンジン内のピストンがシリンダ内で往復移動することにより発生する振動（主振動）と、エンジン内のクランクシャフトの回転速度が変化することにより生じる振動（副振動）とが挙げられる。エンジンが直列型の場合には、前記主振動は、その振幅方向（主振幅方向）が車両の上下方向と略一致するものとなり、また前記副振動は、その振幅方向（副振幅方向）が主振動の振幅方向とは直交する車両の前後方向（エンジンが横置き）又は左右方向（エンジンが縦置き）と略一致するものになる。ここで、弾性体１６は、入力振動が主振幅方向に沿った主振動であっても、副振幅方向に沿った副振動であっても、これらの振動の一部を吸振作用により吸収可能である。 At this time, as main vibrations input from the engine, for example, vibrations (main vibrations) generated by reciprocating movement of pistons in the engine and changes in the rotational speed of the crankshaft in the engine change. The generated vibration (sub vibration) is mentioned. When the engine is a serial type, the main vibration has an amplitude direction (main amplitude direction) that substantially coincides with the vertical direction of the vehicle, and the sub-vibration has a main vibration direction (sub-amplitude direction). The vibration amplitude direction substantially coincides with the vehicle front-rear direction (the engine is placed horizontally) or the left-right direction (the engine is placed vertically) orthogonal to the vibration amplitude direction. Here, the elastic body 16 can absorb a part of these vibrations by a vibration absorbing action, regardless of whether the input vibration is a main vibration along the main amplitude direction or a sub vibration along the sub amplitude direction. is there.

また、防振装置１０では、第１受圧液室５０と平衡室５４が、第１オリフィス３４を通して連通している。したがって、外側取付部材１４又は内側取付部材１２に主振幅方向に沿った主振動が入力すると、弾性体１６が主振幅方向に沿って弾性変形し、第１受圧液室５０の内容積を拡縮させ、第１オリフィス３４を通して第１受圧液室５０と平衡室５４との間を、液体が相互に流通する。 Further, in the vibration isolator 10, the first pressure receiving liquid chamber 50 and the equilibrium chamber 54 communicate with each other through the first orifice 34. Therefore, when the main vibration along the main amplitude direction is input to the outer mounting member 14 or the inner mounting member 12, the elastic body 16 is elastically deformed along the main amplitude direction, and the inner volume of the first pressure receiving liquid chamber 50 is expanded or contracted. The liquid flows between the first pressure receiving liquid chamber 50 and the equilibrium chamber 54 through the first orifice 34.

このとき、第１オリフィス３４における路長及び断面積、すなわち液体の流通抵抗が、シェイク振動の周波数に適合するように設定（チューニング）されているので、入力する主振動がシェイク振動である場合には、第１オリフィス３４を通して第１受圧液室５０と平衡室５４との間をシェイク振動に同期して相互に流通する液体に共振現象（液柱共振）が生じ、この液柱共振等によって主振幅方向に沿って入力するシェイク振動を特に効果的に吸収することができる。 At this time, since the path length and the cross-sectional area in the first orifice 34, that is, the flow resistance of the liquid is set (tuned) so as to match the frequency of the shake vibration, the input main vibration is the shake vibration. A resonance phenomenon (liquid column resonance) occurs in the liquid flowing between the first pressure receiving liquid chamber 50 and the equilibrium chamber 54 through the first orifice 34 in synchronism with the shake vibration. Shake vibration input along the amplitude direction can be particularly effectively absorbed.

また、上弾性壁１８は、上側に隣接して平衡室５４が配置されているので、平衡室５４に充填された液体の液圧により安易な変位が抑制され、防振装置１０のチューニングを容易にすることができる。 Further, since the equilibrium chamber 54 is disposed adjacent to the upper elastic wall 18 on the upper side, easy displacement is suppressed by the liquid pressure of the liquid filled in the equilibrium chamber 54, and tuning of the vibration isolator 10 is easy. Can be.

また、防振装置１０では、前受圧液室５２Ａ、後受圧液室５２Ｂが、第２オリフィス４２を通して平衡室５４に連通している。したがって、外側取付部材１４又は内側取付部材１２に副振幅方向に沿った副振動が入力すると、仕切弾性壁２０及び弾性体１６が副振幅方向に沿って弾性変形し、前受圧液室５２Ａ、後受圧液室５２Ｂの内容積を拡縮させ、第２オリフィス４２を通して前受圧液室５２Ａ、後受圧液室５２Ｂと平衡室５４との間を、液体が相互に流通する。 In the vibration isolator 10, the front pressure receiving liquid chamber 52 A and the rear pressure receiving liquid chamber 52 B communicate with the equilibrium chamber 54 through the second orifice 42. Therefore, when the secondary vibration along the sub-amplitude direction is input to the outer mounting member 14 or the inner mounting member 12, the partition elastic wall 20 and the elastic body 16 are elastically deformed along the sub-amplitude direction, and the front pressure receiving liquid chamber 52A and the rear The internal volume of the pressure receiving liquid chamber 52B is expanded and contracted, and the liquid flows between the front pressure receiving liquid chamber 52A, the rear pressure receiving liquid chamber 52B, and the equilibrium chamber 54 through the second orifice 42.

このとき、第２オリフィス４２における路長及び断面積、すなわち液体の流通抵抗が、アイドル振動の周波数に適合するように設定（チューニング）されているので、入力する副振動が低周波振動である場合には、第２オリフィス４２を通して第２受圧液室５２Ａ、５２Ｂと平衡室５４との間を入力する副振動に同期して相互に流通する液体に共振現象（液柱共振）が生じ、この液柱共振等によって副振幅方向に沿って入力する低周波振動を特に効果的に吸収することができる。 At this time, since the path length and cross-sectional area in the second orifice 42, that is, the flow resistance of the liquid is set (tuned) so as to match the frequency of idle vibration, the input secondary vibration is low-frequency vibration. In this case, a resonance phenomenon (liquid column resonance) occurs in the liquid that flows between the second pressure receiving liquid chambers 52A and 52B and the equilibrium chamber 54 through the second orifice 42 in synchronism with the sub-vibration. Low frequency vibrations input along the sub-amplitude direction due to column resonance or the like can be particularly effectively absorbed.

以上説明したように、本実施形態によれば、平衡室５４と第１受圧液室５０との間に上弾性壁１８が配置されているので、上弾性壁１８が外気に露出されず、劣化を抑制することができる。 As described above, according to the present embodiment, since the upper elastic wall 18 is disposed between the equilibrium chamber 54 and the first pressure-receiving liquid chamber 50, the upper elastic wall 18 is not exposed to the outside air and deteriorates. Can be suppressed.

また、ダイヤフラム３０が、内側取付部材１２に接着されているので、ダイヤフラム３０を弾性体１６や上弾性壁１８等と一体成形することができ、製造工程を少なくすることができる。 Further, since the diaphragm 30 is bonded to the inner mounting member 12, the diaphragm 30 can be integrally formed with the elastic body 16, the upper elastic wall 18 and the like, and the manufacturing process can be reduced.

また、本実施形態では、仕切弾性壁２０に対応する位置で中間部材２２の外周に第１オリフィス３４の一部である溝部２８Ｃを構成しているので、オリフィスを形成するための別部材が不要となり、部品点数の増加を抑制することができる。 Further, in the present embodiment, the groove portion 28C, which is a part of the first orifice 34, is formed on the outer periphery of the intermediate member 22 at a position corresponding to the partition elastic wall 20, so that a separate member for forming the orifice is unnecessary. Thus, an increase in the number of parts can be suppressed.

なお、本実施形態に係る防振装置１０では、平衡室５４と前受圧液室５２Ａ、後受圧液室５２Ｂの各々とを、第２オリフィス４２により連通させたが、平衡室５４と前受圧液室５２Ａ、後受圧液室５２Ｂとは、必ずしも連通されている必要はない。例えば、一対の第２オリフィス４２の平衡室５４への連通口１８Ａ、２２Ａを閉鎖して、前受圧液室５２Ａ、後受圧液室５２Ｂ間のみを連通させてもよい。また、図９に示すように、内側取付部材１２に貫通路１２Ｒを設けて貫通させて、前受圧液室５２Ａ、後受圧液室５２Ｂ間を連通させてもよい。また、本実施形態の第２オリフィス４２に加えて、貫通路１２Ｒを構成してもよい。 In the vibration isolator 10 according to the present embodiment, the equilibrium chamber 54 and each of the front pressure receiving liquid chamber 52A and the rear pressure receiving liquid chamber 52B are communicated with each other by the second orifice 42. The chamber 52A and the post-pressure receiving fluid chamber 52B do not necessarily need to communicate with each other. For example, the communication ports 18A and 22A to the equilibrium chamber 54 of the pair of second orifices 42 may be closed so that only the front pressure receiving liquid chamber 52A and the rear pressure receiving liquid chamber 52B communicate with each other. Further, as shown in FIG. 9, the inner mounting member 12 may be provided with a through passage 12 R so as to pass therethrough so that the front pressure receiving liquid chamber 52 A and the rear pressure receiving liquid chamber 52 B communicate with each other. Further, in addition to the second orifice 42 of the present embodiment, the through passage 12R may be configured.

また、本実施形態では、外側取付部材１４を金属製としたが、図１０及び図１１に示すように、樹脂材料で構成してもよい。この場合には、脚部材１３をフランジ状に構成することができる。また、外側取付部材１４の形成は、金型内に本体部１１をセットすると共に、第１受圧液室５０、第１オリフィス３４、及び、第２オリフィス４２に対応する位置にコアをセットして、樹脂を注入して行うことができる。 In the present embodiment, the outer mounting member 14 is made of metal, but may be made of a resin material as shown in FIGS. In this case, the leg member 13 can be configured in a flange shape. The outer mounting member 14 is formed by setting the main body 11 in the mold and setting the core at a position corresponding to the first pressure receiving liquid chamber 50, the first orifice 34, and the second orifice 42. It can be performed by injecting resin.

１０防振装置
１１本体部
１２内側取付部材
１４外側取付部材
１６弾性体
１８上弾性壁
２０仕切弾性壁
２２中間部材
３０ダイヤフラム
３４第１オリフィス
４０オリフィス部材
４２第２オリフィス
５０第１受圧液室
５２Ａ前受圧液室
５２Ｂ後受圧液室
５４平衡室
Ｓ軸方向 DESCRIPTION OF SYMBOLS 10 Vibration isolator 11 Main body part 12 Inner attachment member 14 Outer attachment member 16 Elastic body 18 Upper elastic wall 20 Partition elastic wall 22 Intermediate member 30 Diaphragm 34 First orifice 40 Orifice member 42 Second orifice 50 First pressure receiving liquid chamber 52A Front Pressure receiving fluid chamber 52B Rear pressure receiving fluid chamber 54 Equilibrium chamber S Axial direction

Claims

振動発生部及び振動受部の一方に連結された内側取付部材と、
振動発生部及び振動受部の他方に連結され、主振動入力方向からみて、前記内側取付部材の外側を囲むように配置された外側取付部材と、
前記内側取付部材と前記外側取付部材との間に配置され、前記内側取付部材と前記外側取付部材とを弾性的に連結する弾性体と、
前記外側取付部材の内側で、前記内側取付部材の主振動入力方向一端側に構成され、内壁の少なくとも一部が前記弾性体により形成され、液体が充填された第１受圧液室と、
前記外側取付部材と前記内側取付部材の間に構成されると共に、前記第１受圧液室との間が前記弾性体で区画され、前記第１受圧液室と逆側が上弾性壁で閉鎖されて、液体が充填された第２受圧液室と、
前記内側取付部材と前記外側取付部材との間に配置されて前記第２受圧液室を前側受圧液室と後側受圧液室に仕切る仕切部材と、
前記第２受圧液室を挟んで主振動入力方向で前記第１受圧液室と逆側に構成され、隔壁の一部がダイヤフラムにより形成されて内部に液体が充填され、この液体の液圧変化に応じて内容積が拡縮可能とされた平衡室と、
前記第１受圧液室と前記平衡室とを互いに連通させて液体を流通可能とする第１制限通路と、
を備え、
前記ダイヤフラム、前記弾性体、前記上弾性壁、及び、前記仕切部材は、前記内側取付部材に、一体的に形成されている、防振装置。 An inner mounting member connected to one of the vibration generator and the vibration receiver;
An outer mounting member connected to the other of the vibration generating unit and the vibration receiving unit, and disposed so as to surround the outer side of the inner mounting member as seen from the main vibration input direction;
An elastic body disposed between the inner mounting member and the outer mounting member and elastically connecting the inner mounting member and the outer mounting member;
A first pressure receiving liquid chamber that is configured on the inner vibration input direction one end side of the inner mounting member inside the outer mounting member, at least a part of the inner wall is formed of the elastic body, and is filled with liquid,
It is configured between the outer mounting member and the inner mounting member, and is partitioned by the elastic body from the first pressure receiving liquid chamber, and the opposite side from the first pressure receiving liquid chamber is closed by an upper elastic wall. A second pressure receiving liquid chamber filled with liquid;
A partition member disposed between the inner mounting member and the outer mounting member to partition the second pressure receiving liquid chamber into a front pressure receiving liquid chamber and a rear pressure receiving liquid chamber;
The second pressure receiving liquid chamber is sandwiched between the first pressure receiving liquid chamber in the main vibration input direction, a part of the partition is formed by a diaphragm, and the inside is filled with liquid, and the liquid pressure change of this liquid An equilibrium chamber whose internal volume can be expanded and contracted according to
A first restriction passage that allows the liquid to flow through the first pressure-receiving liquid chamber and the equilibrium chamber;
With
The vibration isolator, wherein the diaphragm, the elastic body, the upper elastic wall, and the partition member are integrally formed with the inner mounting member.

前記平衡室と、前記前側受圧液室及び前記後側受圧液室の各々とを、互いに連通させて液体を流通可能とする第２制限通路、を備えた請求項１に記載の防振装置。 2. The vibration isolator according to claim 1, further comprising a second restriction passage that allows the liquid to flow through the equilibrium chamber and the front pressure receiving liquid chamber and the rear pressure receiving liquid chamber.

前記前側受圧液室と前記後側受圧液室とを互いに連通させて液体を流通可能とする第３制限通路、を備えた請求項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, further comprising a third restricting passage that allows the liquid to flow through the front pressure receiving liquid chamber and the rear pressure receiving liquid chamber.

前記第１制限通路の少なくとも一部は、前記仕切部材の径方向外側に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 first restriction passage is configured on a radially outer side of the partition member.

前記ダイヤフラムは、前記上弾性壁よりも耐熱性の高い材料で形成されていること、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 vibration isolator according to any one of claims 1 to 4, wherein the diaphragm is made of a material having higher heat resistance than the upper elastic wall.

前記ダイヤフラムは、前記上弾性壁よりも耐オゾン性の高い材料で形成されていること、を特徴とする請求項１〜請求項５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 5, wherein the diaphragm is made of a material having higher ozone resistance than the upper elastic wall.

前記外側取付部材は前記主振動入力方向に沿った筒軸を有する筒状とされ、前記ダイヤフラムは、前記外側取付部材側へ取り付けられる径方向外側の外部と、前記内側取付部材に接着された径方向内側の内部を有し、前記主振動入力方向と直交する方向からみて、前記外側取付部材への組み付け前に前記内部から径方向外側へ向かって前記上弾性壁と離れる方向に延出するように構成されると共に、前記外側取付部材への組み付け後に前記外部が前記外側取付部材への組み付け前よりも前記上弾性壁と近づくように構成されていること、を特徴とする請求項１〜請求項６のいずれか１項に記載の防振装置。 The outer mounting member has a cylindrical shape having a cylindrical shaft along the main vibration input direction, and the diaphragm has a diameter bonded to the outer mounting member and a radially outer portion mounted to the outer mounting member side. An inner portion in the direction and extending in a direction away from the upper elastic wall from the inner side toward the outer side in the radial direction before being assembled to the outer mounting member as viewed from the direction orthogonal to the main vibration input direction. And the outside is configured to be closer to the upper elastic wall after being assembled to the outer mounting member than before being assembled to the outer mounting member. Item 7. The vibration isolator according to any one of items 6.