JP2019148270A - Fluid sealed type vibration isolator and its process of manufacture - Google Patents

Fluid sealed type vibration isolator and its process of manufacture Download PDF

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JP2019148270A
JP2019148270A JP2018031663A JP2018031663A JP2019148270A JP 2019148270 A JP2019148270 A JP 2019148270A JP 2018031663 A JP2018031663 A JP 2018031663A JP 2018031663 A JP2018031663 A JP 2018031663A JP 2019148270 A JP2019148270 A JP 2019148270A
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outer member
diaphragm outer
diaphragm
fluid
main rubber
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聡 梅村
Satoshi Umemura
聡 梅村
鈴木　達也
Tatsuya Suzuki
達也 鈴木
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Sumitomo Riko Co Ltd
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Sumitomo Riko Co Ltd
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Abstract

To provide a new structure fluid sealed type vibration isolator capable of effectively maintaining the fluid tightness between a diaphragm outer component and a partition member by effectively diameter-reducing the diaphragm outer component, and its process of manufacture.SOLUTION: An inner peripheral surface of a cylindrical diaphragm outer component 80 fastened to the outer peripheral part of a flexible film 78 is covered with an inner periphery seal rubber layer 88; and an axial end on the body rubber elastic body 16 side in the diaphragm outer component 80 is to be a cylindrical open end. The diaphragm outer component 80 is fitted to a fitting cylinder part 58 of a second mounting member 14 in a contact state, and an outer peripheral opening of a groove 108 opened on the outer peripheral surface of a partition member 94 is fluid tightly covered by the diaphragm outer component 80 covered with the inner periphery seal rubber layer 88, an orifice passage 128 is formed that communicates a main liquid chamber 124 and an auxiliary liquid chamber 126, which are separated with the partition member 94, with each other.SELECTED DRAWING: Figure 1

Description

本発明は、例えば自動車のエンジンマウントなどに適用される流体封入式防振装置とその製造方法に関するものである。   The present invention relates to a fluid-filled vibration isolator applied to, for example, an engine mount of an automobile and a manufacturing method thereof.

従来から、例えばパワーユニットと車両ボデーを防振連結するエンジンマウントなどに適用される防振装置の一種として、内部に非圧縮性流体が封入された流体封入式防振装置が提案されている。流体封入式防振装置は、例えば特許第３５００５０２号公報（特許文献１）に開示された液封入式防振装置のように、下側取付金具と上側取付金具がゴム弾性体よりなる防振基体によって弾性連結されており、防振基体とダイヤフラムの間に仕切部材によって仕切られた２つの液室が設けられた構造を有している。   2. Description of the Related Art Conventionally, a fluid-filled vibration isolator in which an incompressible fluid is enclosed has been proposed as a type of vibration isolator that is applied to, for example, an engine mount that provides vibration-proof connection between a power unit and a vehicle body. The fluid-filled vibration isolator is, for example, a vibration-proof base in which the lower mounting bracket and the upper mounting bracket are made of a rubber elastic body, like the liquid-filled vibration isolator disclosed in Japanese Patent No. 3500502 (Patent Document 1). And has a structure in which two liquid chambers partitioned by a partition member are provided between the vibration-proof base and the diaphragm.

ところで、特許文献１に開示された液封入式防振装置は、それら２つの液室を相互に連通するオリフィスが仕切部材に形成されている。オリフィスは、仕切部材に形成されて周方向に延びる凹溝の外周開口が、ダイヤフラムの外周部分に固着された中間筒によって覆われることで形成されている。一般的には、仕切部材が中間筒の内周に挿入された状態で中間筒が縮径加工されて、シールゴム層で覆われた中間筒の内周面が仕切部材の外周面に押し付けられることにより、仕切部材に設けられた凹溝の外周開口がシールゴム層を介して中間筒で流体密に覆蓋されてオリフィスが形成される。   By the way, in the liquid-filled vibration isolator disclosed in Patent Document 1, an orifice that connects these two liquid chambers to each other is formed in the partition member. The orifice is formed by covering an outer peripheral opening of a concave groove formed in the partition member and extending in the circumferential direction with an intermediate cylinder fixed to the outer peripheral portion of the diaphragm. In general, the diameter of the intermediate cylinder is reduced while the partition member is inserted into the inner periphery of the intermediate cylinder, and the inner peripheral surface of the intermediate cylinder covered with the seal rubber layer is pressed against the outer peripheral surface of the partition member. Thus, the outer peripheral opening of the concave groove provided in the partition member is fluid-tightly covered with the intermediate cylinder through the seal rubber layer to form an orifice.

しかしながら、特許文献１において、中間筒の上端部には、環状部材にかしめ固定される部分が外周へ突出して設けられており、中間筒の上端部において変形剛性が高くなっていることから、中間筒の縮径加工に大きな力が必要になるおそれがある。特に、中間筒が保持筒に圧入されることによって縮径される場合には、中間筒の変形剛性が高くなると、中間筒の保持筒への圧入組付作業が困難になるおそれもあった。   However, in Patent Document 1, a portion that is caulked and fixed to the annular member is provided at the upper end portion of the intermediate cylinder so as to protrude to the outer periphery, and the deformation rigidity is increased at the upper end portion of the intermediate cylinder. There is a possibility that a large force is required for the diameter reduction processing of the cylinder. In particular, when the diameter of the intermediate cylinder is reduced by being press-fitted into the holding cylinder, if the deformation rigidity of the intermediate cylinder is increased, the press-fit assembly work of the intermediate cylinder to the holding cylinder may be difficult.

特許第３５００５０２号公報Japanese Patent No. 3500502

本発明は、上述の事情を背景に為されたものであって、その解決課題は、ダイヤフラムアウタ部材を効率的に縮径させて、ダイヤフラムアウタ部材と仕切部材の間の流体密性を有効に確保することができる、新規な構造の流体封入式防振装置とその製造方法を提供することにある。   The present invention has been made in the background of the above-mentioned circumstances, and a solution to that problem is to effectively reduce the diameter of the diaphragm outer member and effectively improve the fluid tightness between the diaphragm outer member and the partition member. An object of the present invention is to provide a fluid-filled vibration isolator having a novel structure that can be secured and a method for manufacturing the same.

以下、このような課題を解決するために為された本発明の態様を記載する。なお、以下に記載の各態様において採用される構成要素は、可能な限り任意の組み合わせで採用可能である。   Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible.

すなわち、本発明の第一の態様は、第一の取付部材と第二の取付部材が本体ゴム弾性体によって弾性連結されており、壁部の一部が該本体ゴム弾性体で構成された主液室と壁部の一部が可撓性膜で構成された副液室とが形成されていると共に、それら主液室と副液室を隔てる仕切部材には外周面に開口する凹溝が形成されており、それら主液室と副液室を相互に連通するオリフィス通路が該凹溝によって形成されている流体封入式防振装置において、前記可撓性膜の外周部分に固着された筒状のダイヤフラムアウタ部材の内周面が内周シールゴム層で覆われていると共に、該ダイヤフラムアウタ部材における前記本体ゴム弾性体側の軸方向端が円筒状の開放端とされており、該ダイヤフラムアウタ部材が該第二の取付部材の嵌着筒部に当接状態で装着されて当接力が該ダイヤフラムアウタ部材に及ぼされることにより、該ダイヤフラムアウタ部材が該内周シールゴム層を介して前記仕切部材の外周面に押し付けられて、該仕切部材に設けられた前記凹溝の外周開口が該ダイヤフラムアウタ部材によって流体密に覆蓋されていることを、特徴とする。   That is, according to the first aspect of the present invention, the first mounting member and the second mounting member are elastically connected by the main rubber elastic body, and a part of the wall portion is configured by the main rubber elastic body. A liquid chamber and a sub liquid chamber in which a part of the wall portion is made of a flexible film are formed, and a partition groove that separates the main liquid chamber and the sub liquid chamber has a groove that opens on the outer peripheral surface. In the fluid-filled vibration isolator formed by the concave groove, the cylinder passage fixed to the outer peripheral portion of the flexible film is formed, and the orifice passage that connects the main liquid chamber and the sub liquid chamber to each other is formed by the concave groove. An inner peripheral surface of the diaphragm outer member is covered with an inner peripheral seal rubber layer, and an axial end of the diaphragm outer member on the main rubber elastic body side is a cylindrical open end, and the diaphragm outer member Is in contact with the fitting tube of the second mounting member The diaphragm outer member is pressed against the outer peripheral surface of the partition member via the inner peripheral sealing rubber layer, and the contact force is exerted on the diaphragm outer member. The outer peripheral opening of the groove is covered fluid-tightly by the diaphragm outer member.

このような第一の態様に従う構造とされた流体封入式防振装置によれば、ダイヤフラムアウタ部材の本体ゴム弾性体側の軸方向端が円筒状の開放端とされていることにより、円筒状の開放端とされたダイヤフラムアウタ部材の軸方向端において径方向の変形剛性が小さくされている。それ故、ダイヤフラムアウタ部材の嵌着筒部への装着状態において、ダイヤフラムアウタ部材が嵌着筒部から及ぼされる当接力によって仕切部材の外周面に押し付けられることから、凹溝の外周開口がダイヤフラムアウタ部材によって有効に塞がれて、目的とするオリフィス通路が形成される。   According to the fluid-filled vibration isolator having the structure according to the first aspect as described above, the axial end of the diaphragm outer member on the main rubber elastic body side is a cylindrical open end. The deformation rigidity in the radial direction is reduced at the axial end of the diaphragm outer member that is an open end. Therefore, when the diaphragm outer member is attached to the fitting cylinder portion, the diaphragm outer member is pressed against the outer circumferential surface of the partition member by the contact force exerted from the fitting cylinder portion, so that the outer circumferential opening of the concave groove is the diaphragm outer. The target orifice passage is formed by being effectively blocked by the member.

しかも、ダイヤフラムアウタ部材の軸方向端が円筒状の開放端とされていることで、第二の取付部材への当接反力によるダイヤフラムアウタ部材の変形状態が、安定して筒状を保持したままで小径となるように発現される。それ故、ダイヤフラムアウタ部材が仕切部材の外周面に押し付けられることによるオリフィス通路のシールが、良好に且つ安定して実現される。   In addition, since the axial end of the diaphragm outer member is a cylindrical open end, the deformed state of the diaphragm outer member due to the contact reaction force against the second mounting member stably holds the cylindrical shape. It is expressed so as to have a small diameter. Therefore, the sealing of the orifice passage by pressing the diaphragm outer member against the outer peripheral surface of the partition member is realized satisfactorily and stably.

本発明の第二の態様は、第一の態様に記載された流体封入式防振装置において、前記ダイヤフラムアウタ部材が合成樹脂で形成されているものである。   According to a second aspect of the present invention, in the fluid-filled vibration isolator described in the first aspect, the diaphragm outer member is formed of a synthetic resin.

第二の態様によれば、ダイヤフラムアウタ部材が合成樹脂で形成されることによって、軽量化や製造の容易化が図られると共に、金属製に比してダイヤフラムアウタ部材を効率的に縮径変形させることが可能となって、ダイヤフラムアウタ部材と仕切部材の間においてシール性能の向上が図られる。また、樹脂材の比較的に大きなスプリングバックによって、ダイヤフラムアウタ部材の第二の取付部材への当接状態が安定して維持されることから、当接反力によるダイヤフラムアウタ部材と仕切部材の間のシールが有利に実現されて、オリフィス通路のシール性能の向上や安定化などが図られる。   According to the second aspect, the diaphragm outer member is made of synthetic resin, so that weight reduction and manufacturing are facilitated, and the diaphragm outer member is efficiently reduced in diameter and deformed compared to metal. Thus, the sealing performance can be improved between the diaphragm outer member and the partition member. In addition, the relatively large spring back of the resin material stably maintains the contact state of the diaphragm outer member with the second mounting member, so that the diaphragm outer member and the partition member due to the contact reaction force are maintained. Thus, the sealing performance of the orifice passage is improved and stabilized.

本発明の第三の態様は、第一又は第二の態様に記載された流体封入式防振装置において、前記ダイヤフラムアウタ部材が前記嵌着筒部に装着されていない単体状態において前記本体ゴム弾性体側の軸方向端部に向けて大径となるテーパ筒形状を有しているものである。   According to a third aspect of the present invention, in the fluid-filled vibration isolator described in the first or second aspect, the main body rubber elasticity in a single state in which the diaphragm outer member is not attached to the fitting tube portion. It has a tapered cylindrical shape with a large diameter toward the axial end on the body side.

第三の態様によれば、仕切部材をダイヤフラムアウタ部材の大径側の開口から差し入れることにより、仕切部材をダイヤフラムアウタ部材の内周へ挿入し易くなる。また、ダイヤフラムアウタ部材が第二の取付部材の嵌着筒部に装着されていない単体状態においてテーパ筒形状とされていることにより、ダイヤフラムアウタ部材の嵌着筒部への装着時に小径側から挿入することで、ダイヤフラムアウタ部材が嵌着筒部の軸方向端部に引っ掛かるなどして圧入し難くなるのを防ぐことができて、圧入作業の容易化が図られる。特に、例えば、ダイヤフラムアウタ部材の小径側の端部の外径寸法が、嵌着筒部の開口部の内径寸法に対して同じ乃至は小さくされていれば、ダイヤフラムアウタ部材の嵌着筒部への差入れがより容易になる。   According to the 3rd aspect, it becomes easy to insert a partition member in the inner periphery of a diaphragm outer member by inserting a partition member from opening by the large diameter side of a diaphragm outer member. In addition, since the diaphragm outer member has a tapered cylindrical shape when not attached to the fitting cylinder portion of the second mounting member, it is inserted from the small diameter side when the diaphragm outer member is fitted to the fitting cylinder portion. By doing so, it is possible to prevent the diaphragm outer member from being difficult to press-fit due to being caught by the axial end portion of the fitting cylinder portion, and the press-fitting operation can be facilitated. In particular, for example, if the outer diameter size of the end portion on the small diameter side of the diaphragm outer member is the same or smaller than the inner diameter size of the opening portion of the fitting cylinder portion, the fitting cylinder portion of the diaphragm outer member is moved to. Is easier to insert.

本発明の第四の態様は、第三の態様に記載された流体封入式防振装置において、前記ダイヤフラムアウタ部材の小径側の端部には内周へ突出する肉厚部が設けられているものである。   According to a fourth aspect of the present invention, in the fluid-filled vibration isolator described in the third aspect, a thick portion that protrudes toward the inner periphery is provided at the end portion on the small diameter side of the diaphragm outer member. Is.

第四の態様によれば、ダイヤフラムアウタ部材の小径側端部が肉厚部によって補強されることから、ダイヤフラムアウタ部材の形状安定性の向上が図られて、第二の取付部材の嵌着筒部への組付作業などにおいて、ダイヤフラムアウタ部材の取り回しが容易になる。一方、円筒状の開放端とされたダイヤフラムアウタ部材の大径側端部は、肉厚部から離れていることで肉厚部による補強効果の影響を受け難いことから、嵌着筒部から及ぼされる当接力によって有効に縮径変形される。   According to the fourth aspect, since the end portion on the small diameter side of the diaphragm outer member is reinforced by the thick portion, the shape stability of the diaphragm outer member is improved, and the fitting tube of the second mounting member is provided. The diaphragm outer member can be easily handled in the assembling work to the part. On the other hand, the large-diameter side end of the diaphragm outer member having a cylindrical open end is not affected by the reinforcing effect due to the thick part because it is separated from the thick part. The diameter is effectively reduced and deformed by the contact force applied.

本発明の第五の態様は、第一〜第四の何れか１つの態様に記載された流体封入式防振装置において、前記第二の取付部材に段差部が設けられて、前記ダイヤフラムアウタ部材が該段差部に軸方向で重ね合わされていることで該ダイヤフラムアウタ部材が該第二の取付部材に対して軸方向で位置決めされているものである。   According to a fifth aspect of the present invention, in the fluid-filled vibration isolator described in any one of the first to fourth aspects, a step portion is provided in the second mounting member, and the diaphragm outer member Is superposed on the step portion in the axial direction so that the diaphragm outer member is positioned in the axial direction with respect to the second mounting member.

第五の態様によれば、ダイヤフラムアウタ部材が第二の取付部材の段差部に軸方向で重ね合わされることによって、ダイヤフラムアウタ部材が第二の取付部材に対して所定の軸方向位置に容易に位置決めされる。   According to the fifth aspect, the diaphragm outer member is superimposed on the step portion of the second mounting member in the axial direction, so that the diaphragm outer member can be easily positioned at a predetermined axial position with respect to the second mounting member. Positioned.

本発明の第六の態様は、第五の態様に記載された流体封入式防振装置において、前記第二の取付部材が前記嵌着筒部を有する筒状の周壁部材と該周壁部材の何れか一方の開口を塞ぐ底壁部材とを相互に固定した有底筒状とされており、該周壁部材の該底壁部材側の軸方向端部が内周へ突出する前記段差部を備えていると共に、該底壁部材が該周壁部材よりも高剛性とされて、振動伝達系構成部材への取付構造が該底壁部材に設けられているものである。   According to a sixth aspect of the present invention, in the fluid-filled vibration isolator described in the fifth aspect, any one of the cylindrical peripheral wall member in which the second mounting member has the fitting cylindrical portion and the peripheral wall member. The bottom wall member that closes one of the openings is fixed to each other, and has a stepped portion in which the axial end of the peripheral wall member on the bottom wall member side protrudes to the inner periphery. In addition, the bottom wall member is higher in rigidity than the peripheral wall member, and the mounting structure to the vibration transmission system constituent member is provided on the bottom wall member.

第六の態様によれば、第二の取付部材が有底筒状とされていることにより、第二の取付部材の変形剛性を大きく設定し易くなる。また、車両ボデーなどの振動伝達系構成部材への取付構造が設けられた底壁部材が、周壁部材に比して高剛性とされていることから、荷重の入力による底壁部材の変形などが防止される。   According to the sixth aspect, since the second mounting member has a bottomed cylindrical shape, the deformation rigidity of the second mounting member can be easily set large. In addition, since the bottom wall member provided with a mounting structure to a vibration transmission system component member such as a vehicle body is more rigid than the peripheral wall member, the deformation of the bottom wall member due to the input of a load, etc. Is prevented.

本発明の第七の態様は、第一〜第六の何れか１つの態様に記載された流体封入式防振装置において、前記本体ゴム弾性体の軸方向一方の端部に前記第一の取付部材が固着されていると共に、該本体ゴム弾性体の軸方向他方の端部に本体ゴムアウタ部材が固着されており、該本体ゴムアウタ部材が前記第二の取付部材に固定されている一方、前記ダイヤフラムアウタ部材が該本体ゴムアウタ部材に固着されたシールゴムに対して全周に亘って押し付けられて、それらダイヤフラムアウタ部材と本体ゴムアウタ部材の軸方向間が該シールゴムによって流体密に封止されているものである。   According to a seventh aspect of the present invention, in the fluid-filled vibration isolator described in any one of the first to sixth aspects, the first attachment is attached to one axial end of the main rubber elastic body. While the member is fixed, a main rubber outer member is fixed to the other axial end of the main rubber elastic body, and the main rubber outer member is fixed to the second mounting member, while the diaphragm The outer member is pressed over the entire circumference against the seal rubber fixed to the main rubber outer member, and the axial direction between the diaphragm outer member and the main rubber outer member is fluid-tightly sealed by the seal rubber. is there.

第七の態様によれば、ダイヤフラムアウタ部材と本体ゴムアウタ部材の軸方向間が、シールゴムによって流体密に封止されている。更に、ダイヤフラムアウタ部材と本体ゴムアウタ部材が第二の取付部材にそれぞれ固定されていることにより、ダイヤフラムアウタ部材と本体ゴムアウタ部材の軸方向の相対位置が第二の取付部材によって保持されており、ダイヤフラムアウタ部材のシールゴムに対する当接圧が安定して設定される。   According to the seventh aspect, the axial direction between the diaphragm outer member and the main rubber outer member is sealed fluid-tightly with the seal rubber. Further, since the diaphragm outer member and the main rubber outer member are respectively fixed to the second mounting member, the relative positions in the axial direction of the diaphragm outer member and the main rubber outer member are held by the second mounting member. The contact pressure of the outer member with respect to the seal rubber is set stably.

また、凹溝の外周開口がダイヤフラムアウタ部材で覆われることから、本体ゴムアウタ部材を仕切部材の外周まで延び出させる必要がなく、本体ゴムアウタ部材の軸方向寸法を小さくすることができる。   Further, since the outer peripheral opening of the concave groove is covered with the diaphragm outer member, it is not necessary to extend the main rubber outer member to the outer periphery of the partition member, and the axial dimension of the main rubber outer member can be reduced.

本発明の第八の態様は、第七の態様に記載された流体封入式防振装置において、前記ダイヤフラムアウタ部材が前記シールゴムの外周部分に対して軸方向で押し付けられていると共に、該シールゴムの内周部分が該ダイヤフラムアウタ部材の開口部に嵌め入れられているものである。   According to an eighth aspect of the present invention, in the fluid-filled vibration isolator described in the seventh aspect, the diaphragm outer member is pressed against the outer peripheral portion of the seal rubber in the axial direction. The inner peripheral portion is fitted into the opening of the diaphragm outer member.

第八の態様によれば、ダイヤフラムアウタ部材がシールゴムの外周部分に軸方向で押し付けられることにより、ダイヤフラムアウタ部材と本体ゴムアウタ部材の軸方向間がシールゴムの外周部分によって流体密に封止されている。更に、シールゴムの内周部分がダイヤフラムアウタ部材の開口部に嵌め入れられていることによって、本体ゴムアウタ部材とダイヤフラムアウタ部材の径方向での相対的な位置決めが容易とされていると共に、シールゴムの内周部分がダイヤフラムアウタ部材の内周面に押し付けられることでシール性能の向上も図られ得る。   According to the eighth aspect, the diaphragm outer member is pressed against the outer peripheral portion of the seal rubber in the axial direction, so that the axial direction between the diaphragm outer member and the main rubber outer member is fluid-tightly sealed by the outer peripheral portion of the seal rubber. . Further, since the inner peripheral portion of the seal rubber is fitted into the opening of the diaphragm outer member, relative positioning in the radial direction between the main rubber outer member and the diaphragm outer member is facilitated, and the inner portion of the seal rubber The sealing performance can be improved by pressing the peripheral portion against the inner peripheral surface of the diaphragm outer member.

本発明の第九の態様は、第一〜第八の何れか１つの態様に記載された流体封入式防振装置において、前記本体ゴム弾性体の軸方向一方の端部に前記第一の取付部材が固着されていると共に、該本体ゴム弾性体の軸方向他方の端部に本体ゴムアウタ部材が固着されており、該本体ゴムアウタ部材が前記第二の取付部材に固定されている一方、該本体ゴムアウタ部材が筒状部を備えており、該筒状部の軸方向外側に前記ダイヤフラムアウタ部材が配されていると共に、該筒状部が該第二の取付部材の前記嵌着筒部に挿入されて、それら筒状部と嵌着筒部の軸直角方向の重ね合わせ面間が該筒状部の外周面に固着された外周シールゴムによって封止されているものである。   According to a ninth aspect of the present invention, in the fluid-filled vibration isolator described in any one of the first to eighth aspects, the first attachment is attached to one axial end of the main rubber elastic body. The main body rubber outer member is fixed to the other end in the axial direction of the main rubber elastic body, and the main rubber outer member is fixed to the second mounting member. The rubber outer member has a cylindrical portion, and the diaphragm outer member is disposed on the outer side in the axial direction of the cylindrical portion, and the cylindrical portion is inserted into the fitting cylindrical portion of the second mounting member. The space between the overlapping portions of the cylindrical portion and the fitting cylindrical portion in the direction perpendicular to the axis is sealed with an outer peripheral seal rubber fixed to the outer peripheral surface of the cylindrical portion.

第九の態様によれば、本体ゴムアウタ部材の筒状部が第二の取付部材の嵌着筒部に挿入されることによって、本体ゴムアウタ部材が第二の取付部材に対して径方向で容易に位置決めされる。更に、本体ゴムアウタ部材の筒状部の外周面に固着された外周シールゴムが、筒状部と第二の取付部材の嵌着筒部との径方向間で挟まれて、それら筒状部と嵌着筒部の径方向間が外周シールゴムによって流体密に封止されていることにより、シール性能の更なる向上が図られる。   According to the ninth aspect, the cylindrical portion of the main rubber outer member is inserted into the fitting cylindrical portion of the second mounting member, so that the main rubber outer member can be easily radial with respect to the second mounting member. Positioned. Furthermore, an outer peripheral seal rubber fixed to the outer peripheral surface of the cylindrical portion of the main rubber outer member is sandwiched between the cylindrical portion and the fitting cylindrical portion of the second mounting member, and is fitted to the cylindrical portion. Since the gap between the radial directions of the ring-attached cylinder portions is sealed fluid-tightly by the outer peripheral seal rubber, the sealing performance can be further improved.

本発明の第十の態様は、第一の取付部材と第二の取付部材が本体ゴム弾性体によって弾性連結されており、壁部の一部が該本体ゴム弾性体で構成された主液室と壁部の一部が可撓性膜で構成された副液室とが形成されていると共に、それら主液室と副液室を隔てる仕切部材には少なくとも一部において外周面に開口する凹溝が形成されており、それら主液室と副液室を相互に連通するオリフィス通路が該凹溝によって形成されている流体封入式防振装置の製造方法であって、（ｉ）軸方向一方の開口部が円筒状の開放端とされた筒状のダイヤフラムアウタ部材を準備する工程と、（ｉｉ）該ダイヤフラムアウタ部材の軸方向他方の開口部を塞ぐように前記可撓性膜を形成すると共に、該ダイヤフラムアウタ部材の内周面を覆う内周シールゴム層を形成する工程と、（ｉｉｉ）該内周シールゴム層で覆われた該ダイヤフラムアウタ部材の内周に前記仕切部材を差し入れた後、該ダイヤフラムアウタ部材を前記第二の取付部材の嵌着筒部に圧入して該ダイヤフラムアウタ部材を縮径することで、該ダイヤフラムアウタ部材を該仕切部材の外周面に該内周シールゴム層を介して押し付けて、該仕切部材に設けられた凹溝の外周開口を該ダイヤフラムアウタ部材によって流体密に塞ぐことで前記オリフィス通路を形成する工程とを、有することを特徴とする。   According to a tenth aspect of the present invention, a main liquid chamber in which a first mounting member and a second mounting member are elastically connected by a main rubber elastic body, and a part of a wall portion is configured by the main rubber elastic body. And a secondary liquid chamber in which a part of the wall is formed of a flexible film is formed, and at least part of the partition member separating the main liquid chamber and the secondary liquid chamber is a recess that opens to the outer peripheral surface. A method for manufacturing a fluid-filled vibration isolator in which a groove is formed and an orifice passage that communicates the main liquid chamber and the sub liquid chamber with each other is formed by the concave groove, and (i) one axial direction And (ii) forming the flexible film so as to close the other opening in the axial direction of the diaphragm outer member. And an inner peripheral seal rubber covering the inner peripheral surface of the diaphragm outer member And (iii) inserting the partition member into the inner periphery of the diaphragm outer member covered with the inner peripheral seal rubber layer, and then inserting the diaphragm outer member into the fitting tube portion of the second mounting member The diaphragm outer member is pressed into the outer diameter of the diaphragm member to reduce the diameter of the diaphragm outer member, thereby pressing the diaphragm outer member against the outer peripheral surface of the partition member via the inner peripheral seal rubber layer, thereby opening the outer periphery of the concave groove provided in the partition member. And forming the orifice passage by fluid tightly closing the diaphragm outer member with the diaphragm outer member.

このような第十の態様に従う構造とされた流体封入式防振装置の製造方法によれば、ダイヤフラムアウタ部材を第二の取付部材の嵌着筒部に圧入することによって縮径して、ダイヤフラムアウタ部材を内周シールゴム層を介して仕切部材の外周面に押し付けることにより、仕切部材に設けられた凹溝の外周開口をダイヤフラムアウタ部材によって流体密に覆蓋して、オリフィス通路を形成することができる。   According to the manufacturing method of the fluid-filled vibration isolator having the structure according to the tenth aspect, the diaphragm outer member is reduced in diameter by being press-fitted into the fitting cylinder portion of the second mounting member, and the diaphragm By pressing the outer member against the outer peripheral surface of the partition member through the inner peripheral seal rubber layer, the outer peripheral opening of the concave groove provided in the partition member is covered fluid-tightly by the diaphragm outer member to form an orifice passage. it can.

特に、ダイヤフラムアウタ部材の軸方向端が円筒状の開放端とされていることにより、ダイヤフラムアウタ部材を第二の取付部材の嵌着筒部に圧入することで有効に縮径することができる。   Particularly, since the axial end of the diaphragm outer member is a cylindrical open end, the diameter can be effectively reduced by press-fitting the diaphragm outer member into the fitting tube portion of the second mounting member.

本発明によれば、可撓性膜の外周部分に固着されたダイヤフラムアウタ部材の軸方向端が円筒状の開放端とされていることによって、ダイヤフラムアウタ部材の径方向の変形剛性が小さくされており、ダイヤフラムアウタ部材が第二の取付部材の嵌着筒部から及ぼされる当接力によって効率的に縮径変形せしめられることから、仕切部材に設けられた凹溝の外周開口がダイヤフラムアウタ部材によって有効に塞がれて、目的とするオリフィス通路を形成することができる。   According to the present invention, since the axial end of the diaphragm outer member fixed to the outer peripheral portion of the flexible film is a cylindrical open end, the deformation rigidity in the radial direction of the diaphragm outer member is reduced. Since the diaphragm outer member is efficiently reduced in diameter by the contact force exerted from the fitting tube portion of the second mounting member, the outer periphery opening of the concave groove provided in the partition member is effective by the diaphragm outer member. And the desired orifice passage can be formed.

本発明の第一の実施形態としてのエンジンマウントを示す断面図。Sectional drawing which shows the engine mount as 1st embodiment of this invention. 図１に示すエンジンマウントを構成する本体ゴム弾性体の一体加硫成形品の断面図。Sectional drawing of the integral vulcanization molded product of the main body rubber elastic body which comprises the engine mount shown in FIG. 図１に示すエンジンマウントを構成する第二の取付部材の断面図。Sectional drawing of the 2nd attachment member which comprises the engine mount shown in FIG. 図１に示すエンジンマウントを構成する可撓性膜およびダイヤフラムアウタ部材の断面図。Sectional drawing of the flexible film | membrane and diaphragm outer member which comprise the engine mount shown in FIG. 図１に示すエンジンマウントを構成する仕切部材の断面図。Sectional drawing of the partition member which comprises the engine mount shown in FIG. 図３に示す第二の取付部材に対して図４に示す可撓性膜およびダイヤフラムアウタ部材と図５に示す仕切部材とを組み付けた状態を示す断面図。Sectional drawing which shows the state which assembled | attached the flexible film | membrane and diaphragm outer member shown in FIG. 4, and the partition member shown in FIG. 5 with respect to the 2nd attachment member shown in FIG.

以下、本発明の実施形態について、図面を参照しつつ説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１には、本発明に従う構造とされた流体封入式防振装置の第一の実施形態として、自動車用のエンジンマウント１０を示す。エンジンマウント１０は、第一の取付部材１２と第二の取付部材１４が本体ゴム弾性体１６によって相互に弾性連結された構造を有している。なお、以下の説明において、上下方向とは、マウント軸方向である図１中の上下方向を言う。   FIG. 1 shows an engine mount 10 for an automobile as a first embodiment of a fluid filled type vibration damping device having a structure according to the present invention. The engine mount 10 has a structure in which a first mounting member 12 and a second mounting member 14 are elastically connected to each other by a main rubber elastic body 16. In the following description, the vertical direction refers to the vertical direction in FIG. 1 that is the mount axis direction.

より詳細には、第一の取付部材１２は、金属などで形成された高剛性の部材であって、図１，２に示すように、上部が小径の略円柱形状を有して上面に開口するねじ穴１８を備える締結部２０とされていると共に、下部が下方に向けて次第に小径となる固着部２２とされている。更に、締結部２０の下端部には、外周へ突出するフランジ部２４が一体形成されており、固着部２２の上端よりも外周まで突出している。   More specifically, the first mounting member 12 is a high-rigidity member formed of metal or the like, and as shown in FIGS. The fastening portion 20 is provided with a screw hole 18 and the lower portion is a fixing portion 22 that gradually decreases in diameter toward the lower side. Furthermore, a flange portion 24 that protrudes to the outer periphery is integrally formed at the lower end portion of the fastening portion 20, and protrudes from the upper end of the fixing portion 22 to the outer periphery.

また、第一の取付部材１２の下方には、本体ゴムアウタ部材２６が配されている。本体ゴムアウタ部材２６は、金属などで形成された高剛性の部材であって、上下に延びる薄肉大径の略円筒形状とされた筒状部２８を備えていると共に、筒状部２８の上端から外周へ突出するフランジ状の連結部３０と、筒状部２８の下端から内周へ突出するシール固着部３２とが、筒状部２８と一体形成されている。なお、本実施形態の本体ゴムアウタ部材２６は、プレス金具によって形成されているが、ダイキャスト金具など他の形成品を用いることもできる。   A main rubber outer member 26 is disposed below the first mounting member 12. The main rubber outer member 26 is a high-rigidity member made of metal or the like, and includes a cylindrical portion 28 having a thin and large-diameter substantially cylindrical shape extending vertically, and from the upper end of the cylindrical portion 28. A flange-shaped connecting portion 30 protruding to the outer periphery and a seal fixing portion 32 protruding from the lower end of the cylindrical portion 28 to the inner periphery are integrally formed with the cylindrical portion 28. In addition, although the main body rubber outer member 26 of this embodiment is formed with the press metal fitting, other formed goods, such as a die-cast metal fitting, can also be used.

そして、第一の取付部材１２と本体ゴムアウタ部材２６は、本体ゴム弾性体１６によって相互に弾性連結されている。本体ゴム弾性体１６は、全体として下側に向けて次第に大径となる略円錐台形状を有しており、小径とされた上部が第一の取付部材１２に加硫接着されていると共に、大径とされた下部が本体ゴムアウタ部材２６に加硫接着されている。このように、本実施形態の本体ゴム弾性体１６は、第一の取付部材１２と本体ゴムアウタ部材２６を備えた一体加硫成形品３８として形成されている。なお、第一の取付部材１２のフランジ部２４の上面および外周面には、本体ゴム弾性体１６と一体形成されたストッパゴム４０が固着されている。   The first mounting member 12 and the main rubber outer member 26 are elastically connected to each other by the main rubber elastic body 16. The main rubber elastic body 16 has a generally frustoconical shape that gradually becomes larger in diameter toward the lower side as a whole, and the upper portion having a smaller diameter is vulcanized and bonded to the first mounting member 12. The lower part having a large diameter is vulcanized and bonded to the main rubber outer member 26. As described above, the main rubber elastic body 16 of the present embodiment is formed as an integrally vulcanized molded product 38 including the first mounting member 12 and the main rubber outer member 26. A stopper rubber 40 integrally formed with the main rubber elastic body 16 is fixed to the upper surface and the outer peripheral surface of the flange portion 24 of the first mounting member 12.

さらに、本体ゴム弾性体１６の大径部分には、下面に開口する凹所４２が形成されている。この凹所４２は、逆向きの略すり鉢形状を有しており、内面が下方に向けて大径となるテーパ形状を有している。   Further, a recess 42 that opens to the lower surface is formed in the large-diameter portion of the main rubber elastic body 16. The recess 42 has a substantially mortar shape in the reverse direction, and has a tapered shape with an inner surface having a larger diameter downward.

更にまた、本体ゴムアウタ部材２６には、シール固着部３２の下面を覆うシールゴム４４が固着されている。シールゴム４４は、本体ゴム弾性体１６と一体形成されて、本体ゴムアウタ部材２６よりも下方に設けられており、図２に示すように、下面に設けられた環状段差面４８に対して内周部分が嵌合突部５０とされていると共に、外周部分が受部５２とされて、嵌合突部５０が受部５２よりも下方に突出している。   Furthermore, a seal rubber 44 that covers the lower surface of the seal fixing portion 32 is fixed to the main rubber outer member 26. The seal rubber 44 is integrally formed with the main rubber elastic body 16 and is provided below the main rubber outer member 26. As shown in FIG. 2, the inner peripheral portion of the seal rubber 44 with respect to the annular step surface 48 provided on the lower surface is provided. Is the fitting protrusion 50, the outer peripheral portion is the receiving portion 52, and the fitting protrusion 50 protrudes downward from the receiving portion 52.

さらに、本体ゴムアウタ部材２６には、筒状部２８の外周面を覆う外周シールゴム４６が固着されている。外周シールゴム４６は、本体ゴム弾性体１６およびシールゴム４４と一体形成されており、本体ゴムアウタ部材２６における筒状部２８の外周面の略全面を覆っている。   Further, an outer peripheral seal rubber 46 that covers the outer peripheral surface of the cylindrical portion 28 is fixed to the main rubber outer member 26. The outer peripheral seal rubber 46 is integrally formed with the main rubber elastic body 16 and the seal rubber 44 and covers substantially the entire outer peripheral surface of the cylindrical portion 28 in the main rubber outer member 26.

また、本体ゴムアウタ部材２６には、第二の取付部材１４が取り付けられている。第二の取付部材１４は、図３に示すように、周壁部材５４の下端部に底壁部材５６が固定された構造を有しており、全体として略有底円筒状とされている。   The second attachment member 14 is attached to the main rubber outer member 26. As shown in FIG. 3, the second mounting member 14 has a structure in which a bottom wall member 56 is fixed to the lower end portion of the peripheral wall member 54, and has a substantially bottomed cylindrical shape as a whole.

周壁部材５４は、略円筒形状を有する嵌着筒部５８の上端部に外周へ突出するフランジ状のかしめ部６０を備えると共に、嵌着筒部５８の下端部に内周へ突出する内フランジ状の段差部６２を備えた構造とされている。なお、周壁部材５４の一部には、液注入口６４が貫通形成されており、後述する非圧縮性流体が液注入口６４を通じて後述する平衡室１２６へ注入されるようになっている。   The peripheral wall member 54 is provided with a flange-shaped caulking portion 60 protruding to the outer periphery at the upper end portion of the fitting cylindrical portion 58 having a substantially cylindrical shape, and an inner flange shape protruding to the inner periphery at the lower end portion of the fitting cylindrical portion 58. The step portion 62 is provided. A liquid injection port 64 is formed in a part of the peripheral wall member 54 so that an incompressible fluid described later is injected into an equilibrium chamber 126 described later through the liquid injection port 64.

底壁部材５６は、浅底の略皿形状を有しており、周壁部材５４に比して厚肉とされることで変形剛性が大きくされている。そして、底壁部材５６の周壁の上端が、周壁部材５４の段差部６２の下面に軸方向で突き当てられて、溶接などの手段で固定されることにより、周壁部材５４の下側開口が底壁部材５６によって閉塞されている。更に、底壁部材５６の周壁の上端には、径方向に貫通する切欠き６６が設けられている。更にまた、底壁部材５６の底壁には、径方向中央部分を上下に貫通する穴が形成されており、当該穴に振動伝達系構成部材への取付構造であるボルト６８が嵌合されて、ボルト６８が下向きに突出している。なお、本実施形態において、底壁部材５６の底壁におけるボルト６８の頭部が重ね合わされる部分は、補強部材７０が重ね合わされており、底壁部材５６の変形剛性の向上や、ボルト６８の固定強度の向上などが図られている。   The bottom wall member 56 has a shallow, substantially dish shape, and is thicker than the peripheral wall member 54, so that the deformation rigidity is increased. Then, the upper end of the peripheral wall of the bottom wall member 56 is abutted against the lower surface of the stepped portion 62 of the peripheral wall member 54 in the axial direction and is fixed by means such as welding, so that the lower opening of the peripheral wall member 54 is the bottom. It is closed by the wall member 56. Further, a notch 66 penetrating in the radial direction is provided at the upper end of the peripheral wall of the bottom wall member 56. Furthermore, the bottom wall of the bottom wall member 56 is formed with a hole penetrating the central portion in the radial direction in the vertical direction, and a bolt 68 that is a mounting structure for a vibration transmission system component member is fitted into the hole. The bolt 68 protrudes downward. In this embodiment, the portion of the bottom wall of the bottom wall member 56 where the heads of the bolts 68 are overlapped is overlapped with the reinforcing member 70, and the deformation rigidity of the bottom wall member 56 is improved and the bolt 68 is The improvement of the fixing strength is aimed at.

そして、第二の取付部材１４の上端部に設けられたかしめ部６０が、本体ゴムアウタ部材２６の連結部３０に対して下側から重ね合わされて、それらかしめ部６０と連結部３０がストッパ金具７２によってかしめ固定されることにより、第二の取付部材１４は、本体ゴム弾性体１６の一体加硫成形品３８を構成する本体ゴムアウタ部材２６に取り付けられている。   Then, the caulking portion 60 provided at the upper end portion of the second attachment member 14 is overlapped with the connecting portion 30 of the main rubber outer member 26 from below, and the caulking portion 60 and the connecting portion 30 are connected to the stopper fitting 72. By being caulked and fixed, the second attachment member 14 is attached to the main rubber outer member 26 constituting the integral vulcanization molded product 38 of the main rubber elastic body 16.

ストッパ金具７２は、図１に示すように、全体として大径の略円筒形状を有しており、上端部には内周へ突出する内フランジ状の上ストッパ部７４が設けられていると共に、下端部にはかしめ片７６が設けられている。このかしめ片７６は、ストッパ金具７２の形成状態において、略鉤状断面で環状に連続して設けられており、本体ゴムアウタ部材２６の連結部３０および第二の取付部材１４のかしめ部６０に外挿されていると共に、上端部が本体ゴムアウタ部材２６の連結部３０に対して上側から重ね合わされている。更に、かしめ片７６の下端部が内周へ折り曲げられてかしめ部６０の下面に重ね合わされることにより、それら連結部３０とかしめ部６０に対してかしめ片７６がかしめ固定されて、本体ゴムアウタ部材２６と第二の取付部材１４がストッパ金具７２によって相互に固定されている。   As shown in FIG. 1, the stopper fitting 72 has a substantially cylindrical shape with a large diameter as a whole, and an upper stopper portion 74 having an inner flange shape protruding to the inner periphery is provided at the upper end portion. A caulking piece 76 is provided at the lower end. The caulking piece 76 is continuously provided in an annular shape with a substantially bowl-shaped cross section when the stopper fitting 72 is formed, and is externally connected to the connecting portion 30 of the main rubber outer member 26 and the caulking portion 60 of the second mounting member 14. While being inserted, the upper end portion is overlapped with the connecting portion 30 of the main rubber outer member 26 from above. Furthermore, the lower end portion of the caulking piece 76 is bent to the inner periphery and overlapped with the lower surface of the caulking portion 60, whereby the caulking piece 76 is caulked and fixed to the connecting portion 30 and the caulking portion 60, and the main rubber outer member 26 and the second mounting member 14 are fixed to each other by a stopper fitting 72.

また、第二の取付部材１４には、可撓性膜７８が取り付けられている。可撓性膜７８は、図４に示すように、薄肉の略円形ドーム形状を有するゴム膜であって、外周端部がダイヤフラムアウタ部材８０に固着されている。   A flexible film 78 is attached to the second attachment member 14. As shown in FIG. 4, the flexible film 78 is a thin rubber film having a substantially circular dome shape, and its outer peripheral end is fixed to the diaphragm outer member 80.

ダイヤフラムアウタ部材８０は、全体として略円筒形状を有しており、金属や硬質の合成樹脂などで形成されて、径方向の変形が許容されている。本実施形態では、ダイヤフラムアウタ部材８０の収容筒部８２が、単体状態において上方に向けて次第に大径となるテーパ筒形状を有していると共に、収容筒部８２の小径側の端部である下端部には、内周へ突出する内フランジ状の肉厚部８４が一体形成されている。肉厚部８４は、上下方向の厚さ寸法が収容筒部８２の径方向の厚さ寸法よりも大きくされており、肉厚部８４が設けられたダイヤフラムアウタ部材８０の下端部における径方向の変形剛性が、ダイヤフラムアウタ部材８０の上端部における径方向の変形剛性よりも大きくされている。そして、可撓性膜７８は、肉厚部８４が設けられた収容筒部８２の小径側である下端部において、ダイヤフラムアウタ部材８０に固着されており、ダイヤフラムアウタ部材８０の下開口が可撓性膜７８によって塞がれている。   The diaphragm outer member 80 has a substantially cylindrical shape as a whole, is formed of metal, hard synthetic resin, or the like, and is allowed to deform in the radial direction. In the present embodiment, the accommodation cylinder portion 82 of the diaphragm outer member 80 has a tapered cylindrical shape that gradually increases in diameter toward the upper side in a single state, and is an end portion on the small diameter side of the accommodation cylinder portion 82. The lower end portion is integrally formed with an inner flange-shaped thick portion 84 that protrudes toward the inner periphery. The thickness portion 84 has a thickness dimension in the vertical direction larger than a thickness dimension in the radial direction of the accommodating cylinder portion 82, and the radial thickness at the lower end portion of the diaphragm outer member 80 provided with the thickness portion 84. The deformation rigidity is larger than the radial deformation rigidity at the upper end portion of the diaphragm outer member 80. The flexible membrane 78 is fixed to the diaphragm outer member 80 at the lower end portion on the small diameter side of the accommodating cylinder portion 82 provided with the thick portion 84, and the lower opening of the diaphragm outer member 80 is flexible. The membrane 78 is blocked.

本実施形態において、ダイヤフラムアウタ部材８０の収容筒部８２における下端の肉厚部８４を外れた胴部は、略一定の厚さの円筒状とされている。また、ダイヤフラムアウタ部材８０の単品において、かかる収容筒部８２の胴部は内外径が全長に亘って一定のストレートな円筒状であっても良いが、本実施形態のように内外径寸法が下端から上端に向かって次第に大きくなるテーパ形状とされているのが好ましく、そのテーパ角度は１０度以下の程度に抑えられる。例えば、樹脂型成形やプレス成形などにおいて型抜き用に設定される数度以下の実質的にストレート形状に含まれる程度のテーパ角度であっても良い。   In the present embodiment, the body part of the housing cylinder part 82 of the diaphragm outer member 80 that is out of the thick part 84 at the lower end has a cylindrical shape with a substantially constant thickness. Further, in the single piece of the diaphragm outer member 80, the trunk portion of the accommodating cylinder portion 82 may have a straight cylindrical shape whose inner and outer diameters are constant over the entire length, but the inner and outer diameter dimensions are lower ends as in the present embodiment. It is preferable that the taper shape gradually increases from the upper end toward the upper end, and the taper angle is suppressed to about 10 degrees or less. For example, the taper angle may be a degree substantially included in the straight shape of several degrees or less set for die cutting in resin mold molding or press molding.

さらに、ダイヤフラムアウタ部材８０の収容筒部８２の上端部は、円筒状とされた収容筒部８２の胴部が上端においてそのまま開放されて、円筒状の開放端とされており、フランジ状部や肉厚部、段差部などが開口端にない形状とされている。これにより、収容筒部８２の上端部は、肉厚部８４が設けられた下端部に比して、径方向の変形剛性が小さくされている。ここでいう円筒状とは、厳密に円筒形状である場合のみならず、例えば長円筒形状などを含む。   Further, the upper end portion of the accommodating cylinder portion 82 of the diaphragm outer member 80 is formed as a cylindrical open end with the barrel portion of the accommodating cylinder portion 82 having a cylindrical shape opened at the upper end as it is. A thick part, a step part, etc. are made into the shape which is not in an opening end. As a result, the upper end portion of the accommodating cylinder portion 82 has a smaller radial deformation rigidity than the lower end portion where the thick portion 84 is provided. The term “cylindrical shape” as used herein includes not only a strictly cylindrical shape but also a long cylindrical shape, for example.

なお、本実施形態では、ダイヤフラムアウタ部材８０がポリアミドなどの合成樹脂で形成されていると共に、可撓性膜７８がダイヤフラムアウタ部材８０を備える一体加硫成形品として形成されている。また、ダイヤフラムアウタ部材８０の一部には、液注入穴８６が貫通形成されており、後述する非圧縮性流体が液注入穴８６を通じて後述する平衡室１２６へ注入されるようになっている。   In the present embodiment, the diaphragm outer member 80 is formed of a synthetic resin such as polyamide, and the flexible film 78 is formed as an integral vulcanization molded product including the diaphragm outer member 80. In addition, a liquid injection hole 86 is formed in a part of the diaphragm outer member 80 so that an incompressible fluid described later is injected into an equilibrium chamber 126 described later through the liquid injection hole 86.

さらに、ダイヤフラムアウタ部材８０の収容筒部８２の内周面が内周シールゴム層８８によって覆われていると共に、ダイヤフラムアウタ部材８０の肉厚部８４の上面が上シールゴム層９０によって覆われている。本実施形態の内周シールゴム層８８と上シールゴム層９０は、可撓性膜７８と一体形成されている。更にまた、ダイヤフラムアウタ部材８０の肉厚部８４には、可撓性膜７８と一体形成された当接ゴム９２が、内周端部の下面を覆うように固着されている。   Further, the inner peripheral surface of the accommodating cylinder portion 82 of the diaphragm outer member 80 is covered with the inner peripheral seal rubber layer 88, and the upper surface of the thick portion 84 of the diaphragm outer member 80 is covered with the upper seal rubber layer 90. The inner peripheral seal rubber layer 88 and the upper seal rubber layer 90 of this embodiment are integrally formed with the flexible film 78. Furthermore, a contact rubber 92 integrally formed with the flexible film 78 is fixed to the thick portion 84 of the diaphragm outer member 80 so as to cover the lower surface of the inner peripheral end portion.

また、ダイヤフラムアウタ部材８０の収容筒部８２の内周には、仕切部材９４が配設されている。仕切部材９４は、図５に示すように、全体として略円板形状とされており、仕切部材本体９６と蓋部材９８の間に可動板１００が収容された構造を有している。   In addition, a partition member 94 is disposed on the inner periphery of the accommodation tube portion 82 of the diaphragm outer member 80. As shown in FIG. 5, the partition member 94 has a substantially disk shape as a whole, and has a structure in which the movable plate 100 is accommodated between the partition member main body 96 and the lid member 98.

仕切部材本体９６は、上面中央に開口する収容凹所１０２と、下面中央に開口する下凹所１０４とを備えており、外周端部が内周部分よりも上下方向で厚肉とされて下方へ突出している。なお、仕切部材本体９６には、上面に突出する複数の連結ピン１０６が一体形成されている。   The partition member main body 96 includes a housing recess 102 that opens to the center of the upper surface and a lower recess 104 that opens to the center of the lower surface, and the outer peripheral end is thicker in the vertical direction than the inner peripheral portion and is lower. Protruding to The partition member main body 96 is integrally formed with a plurality of connecting pins 106 protruding from the upper surface.

さらに、仕切部材本体９６の外周部分には、凹溝１０８が形成されている。凹溝１０８は、第一の凹溝１０８ａと第二の凹溝１０８ｂと第三の凹溝１０８ｃとを直列的に設けて構成されている。第一の凹溝１０８ａは、仕切部材本体９６における収容凹所１０２の外周において仕切部材本体９６の径方向中間部分を周方向に延びており、仕切部材本体９６の上面に開口している。第二の凹溝１０８ｂは、第一の凹溝１０８ａよりも外周において周方向に延びており、仕切部材本体９６の上面および外周面に開口している。第三の凹溝１０８ｃは、第二の凹溝１０８ｂよりも下側において仕切部材本体９６の外周端部を周方向に延びており、仕切部材本体９６の外周面に開口している。そして、第一の凹溝１０８ａと第二の凹溝１０８ｂが直列的に連続していると共に、第二の凹溝１０８ｂと第三の凹溝１０８ｃが直列的に連続しており、周方向に３周弱の長さで延びる凹溝１０８が第一〜第三の凹溝１０８ａ，１０８ｂ，１０８ｃによって構成されている。   Further, a concave groove 108 is formed in the outer peripheral portion of the partition member main body 96. The concave groove 108 is configured by providing a first concave groove 108a, a second concave groove 108b, and a third concave groove 108c in series. The first concave groove 108 a extends in the circumferential direction in the radial direction intermediate portion of the partition member main body 96 on the outer periphery of the housing recess 102 in the partition member main body 96, and opens on the upper surface of the partition member main body 96. The second concave groove 108 b extends in the circumferential direction on the outer periphery of the first concave groove 108 a and opens on the upper surface and the outer peripheral surface of the partition member main body 96. The third concave groove 108 c extends in the circumferential direction at the outer peripheral end of the partition member main body 96 below the second concave groove 108 b, and opens to the outer peripheral surface of the partition member main body 96. The first groove 108a and the second groove 108b are continuous in series, and the second groove 108b and the third groove 108c are continuously connected in the circumferential direction. A concave groove 108 extending a little less than three rounds is constituted by first to third concave grooves 108a, 108b, 108c.

蓋部材９８は、仕切部材本体９６と略同じ外径寸法を有する薄肉略円板形状の部材であって、仕切部材本体９６の連結ピン１０６と対応する複数の連結穴１１０が上下に貫通して形成されている。そして、蓋部材９８は、仕切部材本体９６の上面に重ね合わされており、仕切部材本体９６の連結ピン１０６が蓋部材９８の連結穴１１０に挿通された状態で先端部分を押し潰されて拡径されることにより、仕切部材本体９６に固定されている。   The lid member 98 is a thin, substantially disk-shaped member having substantially the same outer diameter as that of the partition member main body 96, and a plurality of connection holes 110 corresponding to the connection pins 106 of the partition member main body 96 penetrate vertically. Is formed. The lid member 98 is overlaid on the upper surface of the partition member main body 96, and the distal end portion is crushed and diameter-expanded in a state where the connection pin 106 of the partition member main body 96 is inserted into the connection hole 110 of the lid member 98. Thus, the partition member main body 96 is fixed.

このように蓋部材９８が仕切部材本体９６に固定されることにより、仕切部材本体９６の収容凹所１０２の開口が蓋部材９８によって覆われており、収容凹所１０２の形成部分において可動板１００が仕切部材本体９６と蓋部材９８の間に収容されている。可動板１００は、略円板形状とされており、ゴム弾性体や合成樹脂、金属などで形成されている。本実施形態の可動板１００は、ゴム弾性体で形成されており、上下外側に向けて突出する緩衝突起１１４が上下両面に各複数形成されていることによって、可動板１００と仕切部材本体９６や蓋部材９８との当接による打音が低減されるようになっている。そして、可動板１００は、仕切部材本体９６と蓋部材９８の間で上下方向の微小変位を許容された状態で収容凹所１０２内に配設されている。なお、蓋部材９８において収容凹所１０２の開口を覆う部分には、上下に貫通する上透孔１１６が形成されていると共に、仕切部材本体９６における収容凹所１０２の底壁部には、上下に貫通する下透孔１１８が形成されている。   By fixing the lid member 98 to the partition member main body 96 in this way, the opening of the accommodation recess 102 of the partition member main body 96 is covered by the lid member 98, and the movable plate 100 is formed at the portion where the accommodation recess 102 is formed. Is accommodated between the partition member main body 96 and the lid member 98. The movable plate 100 has a substantially disc shape, and is formed of a rubber elastic body, a synthetic resin, a metal, or the like. The movable plate 100 of the present embodiment is formed of a rubber elastic body, and a plurality of buffer projections 114 protruding upward and downward are formed on both the upper and lower sides, so that the movable plate 100 and the partition member main body 96 The hitting sound due to contact with the lid member 98 is reduced. The movable plate 100 is disposed in the housing recess 102 in a state where a minute displacement in the vertical direction is allowed between the partition member main body 96 and the lid member 98. An upper through hole 116 penetrating vertically is formed in a portion of the lid member 98 that covers the opening of the housing recess 102, and the bottom wall portion of the housing recess 102 in the partition member main body 96 has upper and lower holes. A lower through-hole 118 penetrating through is formed.

さらに、蓋部材９８が仕切部材本体９６に固定されることにより、仕切部材本体９６の第一の凹溝１０８ａと第二の凹溝１０８ｂの上開口が蓋部材９８によって塞がれている。従って、仕切部材９４の凹溝１０８は、第二の凹溝１０８ｂと第三の凹溝１０８ｃにおいて外周面に開口している。   Further, the lid member 98 is fixed to the partition member main body 96, whereby the upper openings of the first concave groove 108 a and the second concave groove 108 b of the partition member main body 96 are closed by the lid member 98. Accordingly, the concave groove 108 of the partition member 94 is open to the outer peripheral surface at the second concave groove 108b and the third concave groove 108c.

このような構造とされた仕切部材９４は、ダイヤフラムアウタ部材８０の収容筒部８２の内周に差し入れられている。仕切部材９４は、外周端部の下面がダイヤフラムアウタ部材８０の肉厚部８４に対して、上シールゴム層９０を介して重ね合わされることにより、ダイヤフラムアウタ部材８０に対して軸方向で位置決めされている。また、ダイヤフラムアウタ部材８０の上端部は、仕切部材９４の外周端部の上面よりも上方に突出している。なお、本実施形態では、ダイヤフラムアウタ部材８０の収容筒部８２が上側に向けて次第に大径となるテーパ筒形状とされていることから、仕切部材９４が収容筒部８２の内周へ挿入された状態において、収容筒部８２は仕切部材９４の外周面に対して必ずしも密着しておらず、収容筒部８２に対する仕切部材９４の挿入が容易とされている。   The partition member 94 having such a structure is inserted into the inner periphery of the accommodating cylinder portion 82 of the diaphragm outer member 80. The partition member 94 is positioned in the axial direction with respect to the diaphragm outer member 80 by overlapping the lower surface of the outer peripheral end portion with the thick portion 84 of the diaphragm outer member 80 via the upper seal rubber layer 90. Yes. Further, the upper end portion of the diaphragm outer member 80 projects upward from the upper surface of the outer peripheral end portion of the partition member 94. In the present embodiment, since the accommodating cylinder portion 82 of the diaphragm outer member 80 is formed in a tapered cylinder shape that gradually increases in diameter toward the upper side, the partition member 94 is inserted into the inner periphery of the accommodating cylinder portion 82. In this state, the housing cylinder part 82 is not necessarily in close contact with the outer peripheral surface of the partition member 94, and the partition member 94 can be easily inserted into the housing cylinder part 82.

ここにおいて、仕切部材９４が差し入れられたダイヤフラムアウタ部材８０は、図６に示すように、第二の取付部材１４の嵌着筒部５８に対して、当接状態で装着されており、当接力がダイヤフラムアウタ部材８０に及ぼされることで、ダイヤフラムアウタ部材８０が仕切部材９４の外周面に押し付けられている。即ち、本実施形態のダイヤフラムアウタ部材８０は、第二の取付部材１４の嵌着筒部５８に圧入されることによって縮径されており、ダイヤフラムアウタ部材８０の収容筒部８２が内周シールゴム層８８を介して仕切部材９４の外周面に押し付けられている。これにより、仕切部材９４の外周面に開口する凹溝１０８の外周開口が、ダイヤフラムアウタ部材８０によって流体密に覆蓋されており、トンネル状の流路が形成されている。   Here, the diaphragm outer member 80 into which the partition member 94 is inserted is attached in a contact state to the fitting tube portion 58 of the second mounting member 14 as shown in FIG. Is exerted on the diaphragm outer member 80, so that the diaphragm outer member 80 is pressed against the outer peripheral surface of the partition member 94. That is, the diaphragm outer member 80 of the present embodiment is reduced in diameter by being press-fitted into the fitting cylinder portion 58 of the second mounting member 14, and the accommodating cylinder portion 82 of the diaphragm outer member 80 is the inner peripheral seal rubber layer. It is pressed against the outer peripheral surface of the partition member 94 through 88. Thereby, the outer peripheral opening of the concave groove 108 opened to the outer peripheral surface of the partition member 94 is covered fluid-tightly by the diaphragm outer member 80, and a tunnel-like flow path is formed.

特に本実施形態では、ダイヤフラムアウタ部材８０の収容筒部８２がテーパ筒形状であるとともに第二の取付部材１４の嵌着筒部５８が略一定の直径で上下にストレートに延びる筒形状であり、ダイヤフラムアウタ部材８０が小径側となる下側から第二の取付部材１４の嵌着筒部５８に圧入されている。それ故、ダイヤフラムアウタ部材８０が第二の取付部材１４の嵌着筒部５８に圧入される際に、ダイヤフラムアウタ部材８０の下端が第二の取付部材１４の上端に引っ掛かり難く、ダイヤフラムアウタ部材８０を嵌着筒部５８の内周へ差し入れ易くなっている。   In particular, in the present embodiment, the accommodating cylinder portion 82 of the diaphragm outer member 80 has a tapered cylindrical shape, and the fitting cylindrical portion 58 of the second mounting member 14 has a cylindrical shape that extends straight up and down with a substantially constant diameter, The diaphragm outer member 80 is press-fitted into the fitting cylinder portion 58 of the second mounting member 14 from the lower side which is the small diameter side. Therefore, when the diaphragm outer member 80 is press-fitted into the fitting cylinder portion 58 of the second mounting member 14, the lower end of the diaphragm outer member 80 is not easily caught by the upper end of the second mounting member 14, and the diaphragm outer member 80 Is easily inserted into the inner periphery of the fitting tube portion 58.

加えて、ダイヤフラムアウタ部材８０の下端部は、外周角部がアール面取り形状とされることで、軸方向下方に向かって外径寸法が次第に小さくなっており、第二の取付部材１４への組付作業性の向上などが図られている。尤も、例えばＣ面取りなどであっても、第二の取付部材１４への組付作業性の向上などの効果は達成され得る。   In addition, the outer diameter of the lower end portion of the diaphragm outer member 80 is gradually reduced toward the lower side in the axial direction because the outer peripheral corner portion has a rounded chamfered shape. Improvements in attachment workability are attempted. However, even if it is C chamfering, for example, effects such as improvement in workability of assembling to the second mounting member 14 can be achieved.

さらに、ダイヤフラムアウタ部材８０が嵌着筒部５８に圧入された状態において、ダイヤフラムアウタ部材８０の上部の縮径変形量が、ダイヤフラムアウタ部材８０の下部の縮径変形量よりも大きくなっている。そして、ダイヤフラムアウタ部材８０は、第二の取付部材１４の嵌着筒部５８に圧入された状態において、上下方向に略一定の直径で延びるストレートな筒形状となるように変形せしめられており、同じくストレートな筒状とされた仕切部材９４の外周面に対して、軸方向の全体に亘って略一定の力で押し付けられている。それ故、第二の凹溝１０８ｂおよび第三の凹溝１０８ｃの各外周開口が、ダイヤフラムアウタ部材８０によって有効に覆蓋されている。   Further, in the state where the diaphragm outer member 80 is press-fitted into the fitting cylinder portion 58, the amount of diameter reduction deformation of the upper portion of the diaphragm outer member 80 is larger than the amount of diameter reduction deformation of the lower portion of the diaphragm outer member 80. The diaphragm outer member 80 is deformed so as to have a straight cylindrical shape extending in a vertical direction with a substantially constant diameter in a state where the diaphragm outer member 80 is press-fitted into the fitting cylindrical portion 58 of the second mounting member 14. Similarly, it is pressed against the outer peripheral surface of the partition member 94 having a straight cylindrical shape with a substantially constant force over the entire axial direction. Therefore, the outer peripheral openings of the second concave groove 108 b and the third concave groove 108 c are effectively covered with the diaphragm outer member 80.

このように、本実施形態のエンジンマウント１０は、例えば、（ｉ）上端部が円筒状の開放端とされたダイヤフラムアウタ部材８０を射出成型などによって形成して準備する工程と、（ｉｉ）準備したダイヤフラムアウタ部材８０の下端開口を塞ぐように可撓性膜７８を加硫成形すると共に、ダイヤフラムアウタ部材８０の収容筒部８２の内周面に内周シールゴム層８８を形成する工程と、（ｉｉｉ）ダイヤフラムアウタ部材８０を第二の取付部材１４の嵌着筒部５８に圧入することで縮径して、ダイヤフラムアウタ部材８０を仕切部材９４の外周面に対して内周シールゴム層８８を介して押し付けることで、仕切部材９４に設けられた凹溝１０８の外周開口をダイヤフラムアウタ部材８０によって流体密に塞ぐ工程とを、含む製造方法によって得ることができる。   As described above, the engine mount 10 of the present embodiment includes, for example, (i) a step of preparing the diaphragm outer member 80 whose upper end portion is a cylindrical open end by injection molding or the like, and (ii) preparation A step of vulcanizing and forming the flexible membrane 78 so as to close the lower end opening of the diaphragm outer member 80, and forming an inner peripheral seal rubber layer 88 on the inner peripheral surface of the accommodating cylinder portion 82 of the diaphragm outer member 80; iii) The diameter of the diaphragm outer member 80 is reduced by being press-fitted into the fitting cylinder portion 58 of the second mounting member 14, and the diaphragm outer member 80 is interposed with respect to the outer peripheral surface of the partition member 94 via the inner peripheral seal rubber layer 88. And pressing the outer peripheral opening of the concave groove 108 provided in the partition member 94 in a fluid-tight manner by the diaphragm outer member 80. It can be obtained.

なお、本実施形態のエンジンマウント１０の製造方法は、（ｉｖ）第一の取付部材１２と本体ゴムアウタ部材２６を備える本体ゴム弾性体１６の一体加硫成形品３８を形成して準備する工程と、（ｖ）本体ゴムアウタ部材２６の連結部３０とダイヤフラムアウタ部材８０が圧入された第二の取付部材１４のかしめ部６０とを上下に重ね合わせて、予め準備したストッパ金具７２のかしめ片７６によってそれら連結部３０とかしめ部６０をかしめ固定して、本体ゴム弾性体１６と可撓性膜７８の間に受圧室１２４と平衡室１２６を画成する工程と、（ｖｉ）第二の取付部材１４の液注入口６４およびダイヤフラムアウタ部材８０の液注入穴８６を通じて非圧縮性流体を平衡室１２６に注入した後、液注入穴８６を栓体１２２によって封止する工程とを、更に含んでいる。   In addition, the manufacturing method of the engine mount 10 of this embodiment includes the steps of (iv) forming and preparing an integrally vulcanized molded product 38 of the main rubber elastic body 16 including the first mounting member 12 and the main rubber outer member 26. (V) The connecting portion 30 of the main rubber outer member 26 and the caulking portion 60 of the second mounting member 14 into which the diaphragm outer member 80 is press-fitted are vertically overlapped, and the caulking piece 76 of the stopper fitting 72 prepared in advance is used. A step of caulking and fixing the connecting portion 30 and the caulking portion 60 to define a pressure receiving chamber 124 and an equilibrium chamber 126 between the main rubber elastic body 16 and the flexible membrane 78; and (vi) a second mounting member. 14, after injecting the incompressible fluid into the equilibrium chamber 126 through the liquid injection port 64 and the liquid injection hole 86 of the diaphragm outer member 80, the liquid injection hole 86 is sealed with the plug 122. The door includes further.

そして、第二の取付部材１４が本体ゴムアウタ部材２６に固定されることにより、可撓性膜７８が本体ゴム弾性体１６に対して下側に対向して配設されて、それら本体ゴム弾性体１６と可撓性膜７８の上下対向間には、内部に非圧縮性流体が封入された流体封入領域１２０が形成されている。この流体封入領域１２０に封入される非圧縮性流体は、特に限定されないが、例えば、水やエチレングリコール、アルキレングリコール、ポリアルキレングリコール、シリコーン油、或いはそれらの混合液などの液体が好適に採用される。更に、非圧縮性流体としては、０．１Ｐａ・ｓ以下の低粘性流体が望ましい。   Then, by fixing the second mounting member 14 to the main rubber outer member 26, the flexible film 78 is disposed to face the lower side with respect to the main rubber elastic body 16, and these main rubber elastic bodies are arranged. Between the upper and lower sides of 16 and the flexible membrane 78, a fluid sealing region 120 in which an incompressible fluid is sealed is formed. The incompressible fluid sealed in the fluid sealing region 120 is not particularly limited. For example, water, a liquid such as ethylene glycol, alkylene glycol, polyalkylene glycol, silicone oil, or a mixture thereof is preferably used. The Furthermore, as the incompressible fluid, a low viscosity fluid of 0.1 Pa · s or less is desirable.

なお、本実施形態では、本体ゴム弾性体１６の一体加硫成形品３８と第二の取付部材１４を組み合わせた後で、第二の取付部材１４の液注入口６４とダイヤフラムアウタ部材８０の液注入穴８６を通じて非圧縮性流体が注入される。そして、ダイヤフラムアウタ部材８０の液注入穴８６が、非圧縮性流体の注入後に金属球などの栓体１２２によって閉塞されることにより、非圧縮性流体を封入した流体封入領域１２０が画成される。尤も、例えば、一体加硫成形品３８と第二の取付部材１４を非圧縮性流体で満たした水槽中で組み付けることにより、流体封入領域１２０の画成と同時に非圧縮性流体が流体封入領域１２０に封入されるようにしても良い。   In the present embodiment, after the integrally vulcanized molded product 38 of the main rubber elastic body 16 and the second mounting member 14 are combined, the liquid inlet 64 of the second mounting member 14 and the liquid of the diaphragm outer member 80 are combined. An incompressible fluid is injected through the injection hole 86. Then, the liquid injection hole 86 of the diaphragm outer member 80 is closed by a plug body 122 such as a metal sphere after the incompressible fluid is injected, thereby defining a fluid sealing region 120 in which the incompressible fluid is sealed. . However, for example, by assembling the integrally vulcanized molded product 38 and the second attachment member 14 in a water tank filled with the incompressible fluid, the incompressible fluid is simultaneously formed with the fluid-filled region 120. It may be sealed in.

本実施形態において、ダイヤフラムアウタ部材８０の上端部は、仕切部材９４よりも上側に突出しており、本体ゴムアウタ部材２６の下面に固着されたシールゴム４４に対して全周に亘って軸方向で押し付けられている。これにより、流体封入領域１２０は、本体ゴムアウタ部材２６とダイヤフラムアウタ部材８０の軸方向間においてシールゴム４４によって流体密に封止されており、流体封入領域１２０に封入された非圧縮性流体の外部への漏出が防止されている。   In the present embodiment, the upper end portion of the diaphragm outer member 80 protrudes upward from the partition member 94 and is pressed in the axial direction over the entire circumference against the seal rubber 44 fixed to the lower surface of the main rubber outer member 26. ing. As a result, the fluid sealing region 120 is fluid-tightly sealed by the seal rubber 44 between the main rubber outer member 26 and the diaphragm outer member 80 in the axial direction, and the incompressible fluid sealed in the fluid sealing region 120 is exposed to the outside. Leakage is prevented.

しかも、ダイヤフラムアウタ部材８０と本体ゴムアウタ部材２６は、各別に第二の取付部材１４に固定されていることから、それら本体ゴムアウタ部材２６とダイヤフラムアウタ部材８０の相対位置が、第二の取付部材１４によって精度よく設定されている。それ故、ダイヤフラムアウタ部材８０のシールゴム４４への当接圧の誤差が小さくなることで、シール性能の安定化が図られている。   In addition, since the diaphragm outer member 80 and the main rubber outer member 26 are separately fixed to the second mounting member 14, the relative positions of the main rubber outer member 26 and the diaphragm outer member 80 are determined by the second mounting member 14. Is set accurately. Therefore, the error in the contact pressure between the diaphragm outer member 80 and the seal rubber 44 is reduced, so that the sealing performance is stabilized.

さらに、シールゴム４４に環状段差面４８が設けられており、環状段差面４８よりも内周の嵌合突部５０が、環状段差面４８よりも外周の受部５２よりも下側へ突出している。そして、ダイヤフラムアウタ部材８０がシールゴム４４の受部５２に軸方向で押し付けられている一方、シールゴム４４の嵌合突部５０がダイヤフラムアウタ部材８０の上側開口に嵌め入れられて、シールゴム４４の環状段差面４８がダイヤフラムアウタ部材８０の内周面に内周シールゴム層８８を介して押し付けられている。これにより、本体ゴムアウタ部材２６とダイヤフラムアウタ部材８０の間においてより高度なシール性能が実現され得ると共に、本体ゴム弾性体１６の一体加硫成形品３８とダイヤフラムアウタ部材８０の相対的な位置決めも容易になる。   Further, an annular step surface 48 is provided on the seal rubber 44, and the inner peripheral fitting projection 50 protrudes below the outer periphery receiving portion 52 from the annular step surface 48. . The diaphragm outer member 80 is pressed against the receiving portion 52 of the seal rubber 44 in the axial direction, while the fitting protrusion 50 of the seal rubber 44 is fitted into the upper opening of the diaphragm outer member 80 so that the annular step of the seal rubber 44 is The surface 48 is pressed against the inner peripheral surface of the diaphragm outer member 80 via an inner peripheral seal rubber layer 88. As a result, a higher level of sealing performance can be realized between the main rubber outer member 26 and the diaphragm outer member 80, and relative positioning of the integrally vulcanized molded product 38 of the main rubber elastic body 16 and the diaphragm outer member 80 is easy. become.

更にまた、本体ゴムアウタ部材２６の筒状部２８が第二の取付部材１４の嵌着筒部５８に差し入れられていると共に、筒状部２８の外周面が外周シールゴム４６によって覆われており、外周シールゴム４６が筒状部２８と嵌着筒部５８との間で径方向に圧縮されている。これにより、本体ゴムアウタ部材２６と第二の取付部材１４の径方向間が、外周シールゴム４６によって封止されており、シール性能の更なる向上が図られている。本実施形態では、ダイヤフラムアウタ部材８０が本体ゴムアウタ部材２６に対して軸方向下側に外れた位置に設けられており、ダイヤフラムアウタ部材８０は本体ゴムアウタ部材２６の筒状部２８と第二の取付部材１４の嵌着筒部５８との径方向間には配されていない。   Furthermore, the cylindrical portion 28 of the main rubber outer member 26 is inserted into the fitting cylindrical portion 58 of the second mounting member 14, and the outer peripheral surface of the cylindrical portion 28 is covered with the outer peripheral seal rubber 46. The seal rubber 46 is compressed in the radial direction between the tubular portion 28 and the fitting tubular portion 58. Thereby, the space between the main rubber outer member 26 and the second mounting member 14 in the radial direction is sealed by the outer peripheral seal rubber 46, and the sealing performance is further improved. In the present embodiment, the diaphragm outer member 80 is provided at a position disengaged axially downward from the main rubber outer member 26. The diaphragm outer member 80 is connected to the cylindrical portion 28 of the main rubber outer member 26 and the second attachment. The member 14 is not arranged between the fitting cylinder portion 58 and the radial direction.

特に、外周シールゴム４６の下端部がシールゴム４４の外周部分と連続していることから、ダイヤフラムアウタ部材８０がシールゴム４４の外周部分に軸方向で押し付けられることにより、外周シールゴム４６の下方への逃げが抑えられて、本体ゴムアウタ部材２６と第二の取付部材１４の径方向間が外周シールゴム４６によって有効に封止されている。   In particular, since the lower end portion of the outer peripheral seal rubber 46 is continuous with the outer peripheral portion of the seal rubber 44, the diaphragm outer member 80 is pressed against the outer peripheral portion of the seal rubber 44 in the axial direction, thereby causing the outer peripheral seal rubber 46 to escape downward. The outer circumferential seal rubber 46 effectively seals the radial direction between the main rubber outer member 26 and the second mounting member 14.

また、仕切部材９４が流体封入領域１２０において軸直角方向に広がるように配設されており、仕切部材９４に対して上側には、壁部の一部が本体ゴム弾性体１６で構成された主液室としての受圧室１２４が形成されていると共に、仕切部材９４に対して下側には、壁部の一部が可撓性膜７８で構成された副液室としての平衡室１２６が形成されている。受圧室１２４と平衡室１２６にはそれぞれ上記非圧縮性流体が封入されており、受圧室１２４は振動入力時に本体ゴム弾性体１６の変形によって内圧変動が惹起されるようになっていると共に、平衡室１２６は振動入力時に可撓性膜７８の変形によって容積変化が許容されるようになっている。なお、第二の取付部材１４の底壁部材５６の上端に切欠き６６が設けられており、底壁部材５６と可撓性膜７８の間の空間における空気ばねの作用が、切欠き６６を通じた外部空間との連通によって防止されていることから、平衡室１２６の容積変化が効率的に許容されるようになっている。   In addition, the partition member 94 is disposed so as to expand in the direction perpendicular to the axis in the fluid sealing region 120, and a main wall part of the main body rubber elastic body 16 is formed on the upper side of the partition member 94. A pressure receiving chamber 124 as a liquid chamber is formed, and an equilibration chamber 126 as a sub liquid chamber in which a part of the wall portion is formed of a flexible film 78 is formed below the partition member 94. Has been. The pressure receiving chamber 124 and the equilibrium chamber 126 are filled with the above-described incompressible fluid. The pressure receiving chamber 124 is caused to undergo internal pressure fluctuation due to deformation of the main rubber elastic body 16 when vibration is input, The chamber 126 is allowed to change its volume by deformation of the flexible film 78 when vibration is input. Note that a notch 66 is provided at the upper end of the bottom wall member 56 of the second mounting member 14, and the action of the air spring in the space between the bottom wall member 56 and the flexible membrane 78 passes through the notch 66. Therefore, the volume change of the equilibrium chamber 126 is efficiently allowed.

本実施形態では、シールゴム４４の嵌合突部５０が仕切部材９４の上面に押し付けられており、本体ゴムアウタ部材２６と仕切部材９４の軸方向間が嵌合突部５０によって封止されていると共に、ダイヤフラムアウタ部材８０から上側への仕切部材９４の抜けが防止されている。   In this embodiment, the fitting protrusion 50 of the seal rubber 44 is pressed against the upper surface of the partition member 94, and the axial direction between the main rubber outer member 26 and the partition member 94 is sealed by the fitting protrusion 50. The partition member 94 is prevented from coming off from the diaphragm outer member 80 to the upper side.

また、仕切部材９４の凹溝１０８の外周開口がダイヤフラムアウタ部材８０により覆蓋されて形成されたトンネル状の流路は、第一の凹溝１０８ａ側の端部が蓋部材９８に形成された図示しない上連通口を通じて受圧室１２４に連通されていると共に、第三の凹溝１０８ｃ側の端部が仕切部材本体９６に形成された図示しない下連通口を通じて平衡室１２６に連通されている。これにより、受圧室１２４と平衡室１２６を相互に連通するオリフィス通路１２８が、凹溝１０８の外周開口がダイヤフラムアウタ部材８０で覆われることによって形成されている。なお、本実施形態のオリフィス通路１２８は、通路長と通路断面積の比を調節することによって、流動流体の共振周波数であるチューニング周波数がエンジンシェイクに相当する１０Ｈｚ程度の低周波数に設定されているが、オリフィス通路１２８のチューニング周波数は要求される防振特性に応じて適宜に変更される。   In addition, the tunnel-like flow path formed by covering the outer peripheral opening of the concave groove 108 of the partition member 94 with the diaphragm outer member 80 is illustrated in which the end on the first concave groove 108a side is formed in the lid member 98. The pressure receiving chamber 124 communicates with the pressure receiving chamber 124 through an upper communication port that is not connected, and the end portion on the third groove 108 c side communicates with the equilibrium chamber 126 through a lower communication port (not shown) formed in the partition member main body 96. Thus, an orifice passage 128 that connects the pressure receiving chamber 124 and the equilibrium chamber 126 to each other is formed by covering the outer peripheral opening of the groove 108 with the diaphragm outer member 80. In the orifice passage 128 of this embodiment, the tuning frequency, which is the resonance frequency of the flowing fluid, is set to a low frequency of about 10 Hz corresponding to the engine shake by adjusting the ratio of the passage length and the passage sectional area. However, the tuning frequency of the orifice passage 128 is appropriately changed according to the required vibration isolation characteristics.

さらに、仕切部材９４に設けられた可動板１００は、受圧室１２４の液圧が上透孔１１６を通じて上面に及ぼされていると共に、平衡室１２６の液圧が下透孔１１８を通じて下面に及ぼされており、受圧室１２４と平衡室１２６の相対的な圧力変動によって、上下に微小変位するようになっている。   Further, in the movable plate 100 provided in the partition member 94, the hydraulic pressure of the pressure receiving chamber 124 is exerted on the upper surface through the upper through hole 116, and the hydraulic pressure of the equilibrium chamber 126 is exerted on the lower surface through the lower through hole 118. The displacement is slightly displaced up and down by the relative pressure fluctuation between the pressure receiving chamber 124 and the equilibrium chamber 126.

かくの如き構造とされたエンジンマウント１０は、第一の取付部材１２がねじ穴１８に螺着される図示しないボルトによって図示しないパワーユニットに取り付けられると共に、第二の取付部材１４がボルト６８によって図示しない振動伝達系構成部材としての車両ボデーに取り付けられる。これにより、エンジンマウント１０が車両に装着されて、パワーユニットがエンジンマウント１０を介して車両ボデーに防振連結されるようになっている。   The engine mount 10 having such a structure is attached to a power unit (not shown) by a bolt (not shown) in which the first mounting member 12 is screwed into the screw hole 18, and the second mounting member 14 is shown by a bolt 68. It is attached to the vehicle body as a vibration transmission system constituent member that does not. As a result, the engine mount 10 is mounted on the vehicle, and the power unit is connected to the vehicle body via the engine mount 10 in a vibration-proof manner.

そして、エンジンシェイクに相当する低周波振動の入力に対して、受圧室１２４と平衡室１２６の間でオリフィス通路１２８を通じた流体流動が生ぜしめられて、流体の流動作用に基づく防振効果が発揮される。なお、低周波大振幅振動の入力時には、可動板１００の変位が両室１２４，１２６間の相対的な内圧変動に追従しきれず、上透孔１１６と下透孔１１８が可動板１００によって交互に塞がれることから、上透孔１１６と収容凹所１０２と下透孔１１８とによって構成される流路が遮断状態とされて、オリフィス通路１２８を通じた流体流動が効率的に生ぜしめられる。   A fluid flow through the orifice passage 128 is generated between the pressure receiving chamber 124 and the equilibrium chamber 126 in response to an input of low-frequency vibration corresponding to an engine shake, and an anti-vibration effect based on the fluid flow action is exhibited. Is done. When the low frequency large amplitude vibration is input, the displacement of the movable plate 100 cannot follow the relative internal pressure fluctuation between the two chambers 124 and 126, and the upper through hole 116 and the lower through hole 118 are alternately formed by the movable plate 100. Since it is blocked, the flow path constituted by the upper through-hole 116, the accommodation recess 102, and the lower through-hole 118 is blocked, and fluid flow through the orifice passage 128 is efficiently generated.

本実施形態では、オリフィス通路１２８を構成する凹溝１０８が上下に配置される第二の凹溝１０８ｂと第三の凹溝１０８ｃを含んで構成されていることにより、仕切部材９４の外周面に重ね合わされるダイヤフラムアウタ部材８０によってそれら第二，第三の凹溝１０８ｂ，１０８ｃの外周開口を覆うことで、通路長さの長いオリフィス通路１２８を簡単に得ることができる。加えて、本実施形態では、第二の凹溝１０８ｂの内周に第一の凹溝１０８ａが設けられていることから、オリフィス通路１２８の通路長さがより長く確保されている。このように、オリフィス通路１２８の通路長さが簡単に且つスペース効率よく確保されていることによって、オリフィス通路１２８のチューニング自由度を大きく得ることができると共に、オリフィス通路１２８を通じた流体の流動量を大きく得て、オリフィス通路１２８による防振効果を有利に得ることができる。   In the present embodiment, the concave groove 108 constituting the orifice passage 128 is configured to include the second concave groove 108b and the third concave groove 108c arranged above and below, so that the outer circumferential surface of the partition member 94 is provided. By covering the outer peripheral openings of the second and third concave grooves 108b and 108c with the diaphragm outer member 80 to be overlaid, the orifice passage 128 having a long passage length can be easily obtained. In addition, in the present embodiment, since the first groove 108a is provided on the inner periphery of the second groove 108b, the passage length of the orifice passage 128 is ensured to be longer. As described above, since the passage length of the orifice passage 128 is simply and efficiently secured, the degree of freedom in tuning the orifice passage 128 can be increased, and the amount of fluid flowing through the orifice passage 128 can be reduced. The vibration isolation effect by the orifice passage 128 can be advantageously obtained.

また、アイドリング振動や走行こもり音などの中乃至高周波振動の入力時には、受圧室１２４と平衡室１２６の相対的な液圧変動に基づいて、可動板１００が収容凹所１０２内で上下に変位する。これにより、オリフィス通路１２８の***振による実質的な閉塞が回避されて、受圧室１２４の実質的な密閉化が回避されることから、低動ばね化による振動絶縁作用を得ることができる。   In addition, when medium to high frequency vibrations such as idling vibrations and running noises are input, the movable plate 100 is displaced up and down in the accommodation recess 102 based on relative fluid pressure fluctuations between the pressure receiving chamber 124 and the equilibrium chamber 126. . As a result, substantial obstruction due to anti-resonance of the orifice passage 128 is avoided, and substantial sealing of the pressure receiving chamber 124 is avoided, so that a vibration insulation effect due to low dynamic springs can be obtained.

このような本実施形態に従う構造とされたエンジンマウント１０は、ダイヤフラムアウタ部材８０が仕切部材９４の外周面に内周シールゴム層８８を介して押し付けられることにより、凹溝１０８の外周開口がダイヤフラムアウタ部材８０によって覆われてオリフィス通路１２８が形成されるようになっていると共に、ダイヤフラムアウタ部材８０の上端部が筒状の開放端とされていることにより、ダイヤフラムアウタ部材８０の径方向の変形剛性が小さくされている。これにより、ダイヤフラムアウタ部材８０が第二の取付部材１４の嵌着筒部５８に圧入されて縮径される際に、ダイヤフラムアウタ部材８０が効率的に縮径変形せしめられて、凹溝１０８の外周開口がダイヤフラムアウタ部材８０によって有効に閉塞される。その結果、オリフィス通路１２８において流体の漏れなどが回避されて、目的とする防振性能を有効に得ることができる。   In the engine mount 10 having the structure according to this embodiment, the diaphragm outer member 80 is pressed against the outer peripheral surface of the partition member 94 via the inner peripheral seal rubber layer 88, so that the outer peripheral opening of the concave groove 108 is changed to the diaphragm outer. The orifice passage 128 is formed so as to be covered with the member 80, and the upper end portion of the diaphragm outer member 80 is a cylindrical open end, so that the deformation rigidity in the radial direction of the diaphragm outer member 80 is increased. Has been made smaller. Thereby, when the diaphragm outer member 80 is press-fitted into the fitting tube portion 58 of the second mounting member 14 and is reduced in diameter, the diaphragm outer member 80 is efficiently reduced in diameter and deformed, so that the concave groove 108 is formed. The outer peripheral opening is effectively closed by the diaphragm outer member 80. As a result, fluid leakage or the like is avoided in the orifice passage 128, and the desired vibration isolation performance can be obtained effectively.

しかも、本実施形態のダイヤフラムアウタ部材８０は、ポリアミドなどの合成樹脂で形成された硬質の部材とされている。それ故、ダイヤフラムアウタ部材８０の軽量化や製造の容易化が図られると共に、金属製に比して径方向の変形性にも優れている。更に、樹脂材の弾性的な形状復元作用による比較的大きなスプリングバックを利用して、第二の取付部材１４への当接状態を安定して維持し、当接反力をうまく活用してオリフィス通路１２８のシール性能の向上と耐久信頼性の向上を図り得る。   In addition, the diaphragm outer member 80 of the present embodiment is a hard member formed of a synthetic resin such as polyamide. Therefore, the diaphragm outer member 80 can be reduced in weight and manufactured easily, and has excellent radial deformability as compared with metal. Further, the relatively large spring back due to the elastic shape restoring action of the resin material is used to stably maintain the contact state with the second mounting member 14 and to effectively utilize the contact reaction force to make the orifice It is possible to improve the sealing performance of the passage 128 and the durability reliability.

さらに、ダイヤフラムアウタ部材８０の収容筒部８２の上端開口部がフランジ状部などを持たない筒状の開放端とされていることで、第二の取付部材１４への当接反力によるダイヤフラムアウタ部材８０の変形状態が、筒状を保持したままで小径となるように安定して発現される。それ故、ダイヤフラムアウタ部材８０の仕切部材９４への嵌着によるオリフィス通路１２８のシール性能が、良好に且つ安定して発揮され得る。   Further, the upper end opening of the accommodating cylinder portion 82 of the diaphragm outer member 80 is a cylindrical open end that does not have a flange-shaped portion or the like. The deformed state of the member 80 is stably expressed so as to have a small diameter while maintaining the cylindrical shape. Therefore, the sealing performance of the orifice passage 128 by fitting the diaphragm outer member 80 to the partition member 94 can be exhibited satisfactorily and stably.

また、ダイヤフラムアウタ部材８０の小径側となる下端部には、内周へ突出する肉厚部８４が設けられており、ダイヤフラムアウタ部材８０の下側開口部が肉厚部８４によって補強されて径方向の変形剛性が高くされている。これにより、ダイヤフラムアウタ部材８０の形状安定性の向上が図られており、ダイヤフラムアウタ部材８０を第二の取付部材１４に圧入する作業などがし易くなっている。   In addition, a thick portion 84 that protrudes to the inner periphery is provided at the lower end portion of the diaphragm outer member 80 on the small diameter side, and the lower opening of the diaphragm outer member 80 is reinforced by the thick portion 84 and has a diameter. Directional deformation rigidity is high. Thereby, the shape stability of the diaphragm outer member 80 is improved, and the operation of press-fitting the diaphragm outer member 80 into the second mounting member 14 is facilitated.

しかも、本実施形態では、ダイヤフラムアウタ部材８０の収容筒部８２が、単体状態で上部に向けて大径となるテーパ筒形状を有しており、第二の取付部材１４の嵌着筒部５８に圧入されることで、縦断面において軸方向に対する傾斜角度が小さくなるように変形せしめられる。それ故、肉厚部８４を外れた上部が縮径変形せしめられる一方、肉厚部８４が設けられた下端部は縮径変形を殆ど生じないようになっている。従って、ダイヤフラムアウタ部材８０の上部において、上端開口部が円筒状の開放端とされることによる効率的な縮径変形を実現しつつ、ダイヤフラムアウタ部材８０の下端部において、肉厚部８４が設けられることで変形剛性が確保されて、ダイヤフラムアウタ部材８０の取り回し性の向上などが図られる。   In addition, in the present embodiment, the accommodating cylinder portion 82 of the diaphragm outer member 80 has a tapered cylindrical shape having a large diameter toward the upper portion in a single state, and the fitting cylinder portion 58 of the second mounting member 14. By being press-fitted into the longitudinal section, the longitudinal section is deformed so that the inclination angle with respect to the axial direction becomes small. Therefore, while the upper part of the thick part 84 is reduced in diameter, the lower end part provided with the thick part 84 hardly deforms. Therefore, at the upper part of the diaphragm outer member 80, a thickened portion 84 is provided at the lower end portion of the diaphragm outer member 80 while realizing efficient diameter reduction deformation by the upper end opening being a cylindrical open end. As a result, deformation rigidity is ensured, and the handling of the diaphragm outer member 80 is improved.

さらに、ダイヤフラムアウタ部材８０の肉厚部８４が第二の取付部材１４の段差部６２に対して上側から重ね合わされることで、ダイヤフラムアウタ部材８０と第二の取付部材１４が軸方向において簡単且つ高精度に位置決めされる。   Further, the thickened portion 84 of the diaphragm outer member 80 is superimposed on the stepped portion 62 of the second mounting member 14 from above, so that the diaphragm outer member 80 and the second mounting member 14 can be easily and axially arranged. Positioned with high accuracy.

更にまた、肉厚部８４の上面に仕切部材９４の下面が重ね合わされることにより、ダイヤフラムアウタ部材８０と仕切部材９４が軸方向において簡単且つ高精度に位置決めされる。特に本実施形態では、肉厚部８４の上面に上シールゴム層９０が固着されていることから、肉厚部８４と仕切部材９４の重ね合わせ面間が流体密に封止されている。   Furthermore, the lower surface of the partition member 94 is superimposed on the upper surface of the thick portion 84, so that the diaphragm outer member 80 and the partition member 94 are easily and accurately positioned in the axial direction. In particular, in the present embodiment, since the upper seal rubber layer 90 is fixed to the upper surface of the thick portion 84, the overlapping surface between the thick portion 84 and the partition member 94 is sealed in a fluid-tight manner.

また、第二の取付部材１４の周壁部材５４は、上側開口部において外周へ突出するかしめ部６０を備えていると共に、下側開口部において内周へ突出する段差部６２を備えていることから、周壁部材５４の変形剛性の向上が図られている。しかも、周壁部材５４の下側開口部に底壁部材５６が固定されていることにより、第二の取付部材１４の変形剛性の更なる向上が図られている。なお、周壁部材５４の下端部に段差部６２が設けられていることによって、周壁部材５４と底壁部材５６の溶接などによる固定が容易になると共に、固定強度を有利に得ることも可能になる。   Further, the peripheral wall member 54 of the second mounting member 14 includes a caulking portion 60 that protrudes toward the outer periphery at the upper opening, and a step portion 62 that protrudes toward the inner periphery at the lower opening. The deformation rigidity of the peripheral wall member 54 is improved. In addition, since the bottom wall member 56 is fixed to the lower opening of the peripheral wall member 54, the deformation rigidity of the second mounting member 14 is further improved. Since the stepped portion 62 is provided at the lower end of the peripheral wall member 54, the peripheral wall member 54 and the bottom wall member 56 can be easily fixed by welding or the like, and the fixing strength can be advantageously obtained. .

さらに、車両ボデーへの取付構造であるボルト６８が固定された底壁部材５６が、周壁部材５４よりも厚肉で高剛性とされていることから、荷重の入力に対する第二の取付部材１４の損傷が防止されて、優れた耐久性を実現することができる。特に本実施形態では、底壁部材５６におけるボルト６８の取付部分に補強部材７０が設けられていることから、ボルト６８に対して大きな荷重が作用しても、底壁部材５６の変形などが一層効果的に防止される。   Furthermore, since the bottom wall member 56 to which the bolt 68 that is the mounting structure to the vehicle body is fixed is thicker and more rigid than the peripheral wall member 54, the second mounting member 14 with respect to the input of the load Damage is prevented and excellent durability can be achieved. In particular, in the present embodiment, since the reinforcing member 70 is provided at the mounting portion of the bolt 68 in the bottom wall member 56, even if a large load acts on the bolt 68, the bottom wall member 56 is further deformed. Effectively prevented.

また、凹溝１０８の外周開口がダイヤフラムアウタ部材８０によって覆われることでオリフィス通路１２８が形成されていることから、本体ゴムアウタ部材２６の軸方向寸法を小さくすることができる。それ故、本体ゴム弾性体１６の一体加硫成形品３８を小型にすることができて、本体ゴム弾性体１６の加硫成形工程において生産効率の向上が図られる。   Moreover, since the orifice passage 128 is formed by the outer periphery opening of the concave groove 108 being covered with the diaphragm outer member 80, the axial dimension of the main rubber outer member 26 can be reduced. Therefore, the integral vulcanization molded product 38 of the main rubber elastic body 16 can be reduced in size, and the production efficiency can be improved in the vulcanization molding process of the main rubber elastic body 16.

以上、本発明の実施形態について詳述してきたが、本発明はその具体的な記載によって限定されない。例えば、ダイヤフラムアウタ部材８０は、必ずしもテーパ筒形状に限定されず、略一定の外径寸法で延びる非傾斜の筒状などとされていても良い。更に、ダイヤフラムアウタ部材８０の肉厚部８４は必須ではなく省略可能である。更にまた、肉厚部８４が設けられる場合に、肉厚部８４の上下厚さ寸法がダイヤフラムアウタ部材８０の収容筒部８２の径方向厚さ寸法より大きいことは必須ではない。また、ダイヤフラムアウタ部材８０は、本体ゴム弾性体１６側の軸方向端部が円筒状の開放端とされていれば、例えば中間部分において外径や内径の変化する部分が設けられていても良い。   As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, the diaphragm outer member 80 is not necessarily limited to the tapered cylindrical shape, and may be a non-inclined cylindrical shape extending with a substantially constant outer diameter. Further, the thick portion 84 of the diaphragm outer member 80 is not essential and can be omitted. Furthermore, in the case where the thick portion 84 is provided, it is not essential that the vertical thickness dimension of the thick portion 84 is larger than the radial thickness dimension of the accommodating cylinder portion 82 of the diaphragm outer member 80. Further, the diaphragm outer member 80 may be provided with a portion whose outer diameter or inner diameter changes, for example, at an intermediate portion as long as the axial end on the main rubber elastic body 16 side is a cylindrical open end. .

さらに、前記実施形態では、ダイヤフラムアウタ部材８０が第二の取付部材１４の嵌着筒部５８に圧入されることで縮径されて、ダイヤフラムアウタ部材８０が仕切部材９４の外周面に押し付けられるようになっていたが、例えば、仕切部材９４に外挿されたダイヤフラムアウタ部材８０に対して八方絞りなどの縮径加工が施されることによって、ダイヤフラムアウタ部材８０が仕切部材９４の外周面に押し付けられるようにもできる。   Furthermore, in the above-described embodiment, the diaphragm outer member 80 is pressed into the fitting cylinder portion 58 of the second mounting member 14 to be reduced in diameter, and the diaphragm outer member 80 is pressed against the outer peripheral surface of the partition member 94. However, for example, the diaphragm outer member 80 is pressed against the outer peripheral surface of the partition member 94 by subjecting the diaphragm outer member 80 extrapolated to the partition member 94 to diameter reduction processing such as an eight-way drawing. It can also be done.

また、ダイヤフラムアウタ部材８０は、下端に肉厚部８４を設けて下端の変形剛性を、仕切部材９４に嵌着される上側部分に比して大きくされていたが、例えば収容筒部８２の肉厚寸法を軸方向で次第に異ならせて下側部分の肉厚寸法を上側部分よりも大きくしても良い。また、第二の取付部材１４も、例えば成形条件を考慮した抜きテーパなどのように上方に向かって拡径するテーパが付されていても良い。テーパが付された第二の取付部材１４を採用した場合には、ダイヤフラムアウタ部材８０には組付状態で対応するテーパが付されることとなる。その場合には、仕切部材９４の外周面にも対応するテーパを付する他、テーパ角度が小さい場合には仕切部材９４の外周面にテーパを付する代わりに内周シールゴム層８８の圧縮量の違いによってダイヤフラムアウタ部材８０の内周面に付されたテーパを吸収してオリフィス通路１２８のシール性を確保することも可能である。   Further, the diaphragm outer member 80 is provided with a thick portion 84 at the lower end to increase the deformation rigidity of the lower end compared to the upper portion fitted to the partition member 94. The thickness dimension of the lower part may be made larger than that of the upper part by varying the thickness dimension in the axial direction. Also, the second mounting member 14 may be provided with a taper that increases in diameter upward, such as a draft taper that takes into account the molding conditions. When the second attachment member 14 with the taper is employed, the corresponding taper is attached to the diaphragm outer member 80 in the assembled state. In that case, the corresponding taper is also applied to the outer peripheral surface of the partition member 94, and when the taper angle is small, the compression amount of the inner peripheral seal rubber layer 88 is changed instead of tapering the outer peripheral surface of the partition member 94. It is also possible to secure the sealing performance of the orifice passage 128 by absorbing the taper applied to the inner peripheral surface of the diaphragm outer member 80 due to the difference.

さらに、前記実施形態において、ダイヤフラムアウタ部材８０において第二の取付部材１４へ圧入される外周面は、プレーンな円筒状面とされていたが、例えば軸方向に延びる複数本の凸条を設けて、当該凸条の突出先端面を第二の取付部材１４に当接させつつ圧入することも可能であり、それによって、第二の取付部材１４に対する摩擦抵抗を軽減しつつ、第二の取付部材１４への当接反力による縮径変形に基づく仕切部材９４の外周面（凹溝１０８の開口面）への押付力（シール性）を確保することもできる。   Furthermore, in the above-described embodiment, the outer peripheral surface of the diaphragm outer member 80 that is press-fitted into the second mounting member 14 is a plain cylindrical surface. However, for example, a plurality of ridges extending in the axial direction are provided. It is also possible to press-fit the protruding tip surface of the ridge while abutting against the second mounting member 14, thereby reducing the frictional resistance against the second mounting member 14 and the second mounting member. It is also possible to ensure a pressing force (sealability) against the outer peripheral surface (opening surface of the groove 108) of the partition member 94 based on the diameter-reducing deformation caused by the reaction force against contact with 14.

また、仕切部材９４の具体的な構造は、前記実施形態によって限定的に解釈されるものではない。例えば、仕切部材９４は、必ずしも可動板や可動膜のような防振機構を備えていなくても良い。また、オリフィス通路１２８の具体的な構造も適宜に変更可能であって、例えば前記実施形態の第一の凹溝１０８ａを持たない上下二段の凹溝によってオリフィス通路１２８を形成することも可能であり、その場合には仕切部材本体９６と蓋部材９８を組み合わせる構造とする必要はない。   Further, the specific structure of the partition member 94 is not limitedly interpreted by the embodiment. For example, the partition member 94 does not necessarily include a vibration isolation mechanism such as a movable plate or a movable film. In addition, the specific structure of the orifice passage 128 can be changed as appropriate. For example, the orifice passage 128 can be formed by two upper and lower concave grooves without the first concave groove 108a of the above embodiment. In this case, the partition member main body 96 and the lid member 98 need not be combined.

また、前記実施形態では、車両ボデーへの取付構造であるボルト６８が第二の取付部材１４に直接的に設けられていたが、例えば、第二の取付部材１４とは別体のブラケット部材を第二の取付部材１４に装着することで、ブラケット部材に設けられた車両ボデーへの取付構造が第二の取付部材１４に間接的に設けられるようにしても良い。この場合には、第二の取付部材１４においてボルト６８だけでなく底壁部材５６を省略することも可能である。   Moreover, in the said embodiment, although the volt | bolt 68 which is the attachment structure to a vehicle body was directly provided in the 2nd attachment member 14, for example, the bracket member separate from the 2nd attachment member 14 is used. By mounting on the second mounting member 14, the mounting structure to the vehicle body provided on the bracket member may be indirectly provided on the second mounting member 14. In this case, it is possible to omit not only the bolt 68 but also the bottom wall member 56 in the second mounting member 14.

１０：エンジンマウント（流体封入式防振装置）、１２：第一の取付部材、１４：第二の取付部材、１６：本体ゴム弾性体、２６：本体ゴムアウタ部材、２８：筒状部、４４：シールゴム、４６：外周シールゴム、５４：周壁部材、５６：底壁部材、５８：嵌着筒部、６２：段差部、６８：ボルト（振動伝達系構成部材への取付構造）、７８：可撓性膜、８０：ダイヤフラムアウタ部材、８４：肉厚部、８８：内周シールゴム層、９４：仕切部材、１０８：凹溝、１２４：受圧室（主液室）、１２６：平衡室（副液室）、１２８：オリフィス通路 10: engine mount (fluid-filled vibration isolator), 12: first mounting member, 14: second mounting member, 16: main rubber elastic body, 26: main rubber outer member, 28: cylindrical portion, 44: Seal rubber, 46: outer peripheral seal rubber, 54: peripheral wall member, 56: bottom wall member, 58: fitting tube portion, 62: stepped portion, 68: bolt (attachment structure to vibration transmission system constituent member), 78: flexibility Membrane, 80: Diaphragm outer member, 84: Thick part, 88: Inner peripheral seal rubber layer, 94: Partition member, 108: Groove, 124: Pressure receiving chamber (main liquid chamber), 126: Equilibrium chamber (sub liquid chamber) 128: Orifice passage

Claims (10)

第一の取付部材と第二の取付部材が本体ゴム弾性体によって弾性連結されており、壁部の一部が該本体ゴム弾性体で構成された主液室と壁部の一部が可撓性膜で構成された副液室とが形成されていると共に、それら主液室と副液室を隔てる仕切部材には外周面に開口する凹溝が形成されており、それら主液室と副液室を相互に連通するオリフィス通路が該凹溝によって形成されている流体封入式防振装置において、
前記可撓性膜の外周部分に固着された筒状のダイヤフラムアウタ部材の内周面が内周シールゴム層で覆われていると共に、該ダイヤフラムアウタ部材における前記本体ゴム弾性体側の軸方向端が円筒状の開放端とされており、該ダイヤフラムアウタ部材が該第二の取付部材の嵌着筒部に当接状態で装着されて当接力が該ダイヤフラムアウタ部材に及ぼされることにより、該ダイヤフラムアウタ部材が該内周シールゴム層を介して前記仕切部材の外周面に押し付けられて、該仕切部材に設けられた前記凹溝の外周開口が該ダイヤフラムアウタ部材によって流体密に覆蓋されていることを特徴とする流体封入式防振装置。 The first mounting member and the second mounting member are elastically connected by a main rubber elastic body, and a part of the wall portion is composed of the main rubber elastic body and a part of the wall portion is flexible. Are formed in the partition member separating the main liquid chamber and the sub liquid chamber, and a groove is formed in the outer peripheral surface. In the fluid-filled vibration isolator in which the orifice passages communicating with the liquid chambers are formed by the concave grooves,
An inner peripheral surface of a cylindrical diaphragm outer member fixed to the outer peripheral portion of the flexible film is covered with an inner peripheral seal rubber layer, and an axial end of the diaphragm outer member on the main rubber elastic body side is a cylinder. When the diaphragm outer member is mounted in contact with the fitting tube portion of the second mounting member and a contact force is exerted on the diaphragm outer member, the diaphragm outer member Is pressed against the outer peripheral surface of the partition member via the inner peripheral seal rubber layer, and the outer peripheral opening of the concave groove provided in the partition member is fluid-tightly covered by the diaphragm outer member. Fluid-filled vibration isolator. 前記ダイヤフラムアウタ部材が合成樹脂で形成されている請求項１に記載の流体封入式防振装置。   The fluid-filled type vibration damping device according to claim 1, wherein the diaphragm outer member is formed of a synthetic resin. 前記ダイヤフラムアウタ部材が前記嵌着筒部に装着されていない単体状態において前記本体ゴム弾性体側の軸方向端部に向けて大径となるテーパ筒形状を有している請求項１又は２に記載の流体封入式防振装置。   3. The tapered outer shape according to claim 1, wherein the diaphragm outer member has a tapered cylindrical shape having a large diameter toward an axial end on the main rubber elastic body side in a single state where the diaphragm outer member is not attached to the fitting cylindrical portion. Fluid-filled vibration isolator. 前記ダイヤフラムアウタ部材の小径側の端部には内周へ突出する肉厚部が設けられている請求項３に記載の流体封入式防振装置。   The fluid-filled vibration isolator according to claim 3, wherein the diaphragm outer member is provided with a thick portion protruding toward an inner periphery at an end portion on a small diameter side. 前記第二の取付部材に段差部が設けられて、前記ダイヤフラムアウタ部材が該段差部に軸方向で重ね合わされていることで該ダイヤフラムアウタ部材が該第二の取付部材に対して軸方向で位置決めされている請求項１〜４の何れか一項に記載の流体封入式防振装置。   The second mounting member is provided with a stepped portion, and the diaphragm outer member is overlapped with the stepped portion in the axial direction so that the diaphragm outer member is positioned in the axial direction with respect to the second mounting member. The fluid-filled vibration isolator according to any one of claims 1 to 4. 前記第二の取付部材が前記嵌着筒部を有する筒状の周壁部材と該周壁部材の何れか一方の開口を塞ぐ底壁部材とを相互に固定した有底筒状とされており、該周壁部材の該底壁部材側の軸方向端部が内周へ突出する前記段差部を備えていると共に、該底壁部材が該周壁部材よりも高剛性とされて、振動伝達系構成部材への取付構造が該底壁部材に設けられている請求項５に記載の流体封入式防振装置。   The second mounting member has a bottomed cylindrical shape in which a cylindrical peripheral wall member having the fitting cylindrical portion and a bottom wall member that closes one of the openings of the peripheral wall member are fixed to each other; An axial end of the peripheral wall member on the bottom wall member side includes the stepped portion protruding to the inner periphery, and the bottom wall member has higher rigidity than the peripheral wall member, so that the vibration transmission system component member can be obtained. The fluid filled type vibration damping device according to claim 5, wherein the mounting structure is provided on the bottom wall member. 前記本体ゴム弾性体の軸方向一方の端部に前記第一の取付部材が固着されていると共に、該本体ゴム弾性体の軸方向他方の端部に本体ゴムアウタ部材が固着されており、該本体ゴムアウタ部材が前記第二の取付部材に固定されている一方、
前記ダイヤフラムアウタ部材が該本体ゴムアウタ部材に固着されたシールゴムに対して全周に亘って押し付けられて、それらダイヤフラムアウタ部材と本体ゴムアウタ部材の軸方向間が該シールゴムによって流体密に封止されている請求項１〜６の何れか一項に記載の流体封入式防振装置。 The first mounting member is fixed to one axial end of the main rubber elastic body, and a main rubber outer member is fixed to the other axial end of the main rubber elastic body. While the rubber outer member is fixed to the second mounting member,
The diaphragm outer member is pressed over the entire circumference against a seal rubber fixed to the main rubber outer member, and the axial direction between the diaphragm outer member and the main rubber outer member is sealed fluid-tightly by the seal rubber. The fluid-filled vibration isolator according to any one of claims 1 to 6. 前記ダイヤフラムアウタ部材が前記シールゴムの外周部分に対して軸方向で押し付けられていると共に、該シールゴムの内周部分が該ダイヤフラムアウタ部材の開口部に嵌め入れられている請求項７に記載の流体封入式防振装置。   8. The fluid sealing according to claim 7, wherein the diaphragm outer member is pressed against the outer peripheral portion of the seal rubber in the axial direction, and the inner peripheral portion of the seal rubber is fitted into the opening of the diaphragm outer member. Type vibration isolator. 前記本体ゴム弾性体の軸方向一方の端部に前記第一の取付部材が固着されていると共に、該本体ゴム弾性体の軸方向他方の端部に本体ゴムアウタ部材が固着されており、該本体ゴムアウタ部材が前記第二の取付部材に固定されている一方、
該本体ゴムアウタ部材が筒状部を備えており、該筒状部の軸方向外側に前記ダイヤフラムアウタ部材が配されていると共に、該筒状部が該第二の取付部材の前記嵌着筒部に挿入されて、それら筒状部と嵌着筒部の軸直角方向の重ね合わせ面間が該筒状部の外周面に固着された外周シールゴムによって封止されている請求項１〜８の何れか一項に記載の流体封入式防振装置。 The first mounting member is fixed to one axial end of the main rubber elastic body, and a main rubber outer member is fixed to the other axial end of the main rubber elastic body. While the rubber outer member is fixed to the second mounting member,
The main rubber outer member includes a cylindrical portion, the diaphragm outer member is disposed on the axially outer side of the cylindrical portion, and the cylindrical portion is the fitting cylindrical portion of the second mounting member. 9. Any one of claims 1 to 8, wherein the cylindrical part and the fitting cylinder part are sealed with an outer peripheral seal rubber fixed to the outer peripheral surface of the cylindrical part between the overlapping surfaces in the direction perpendicular to the axis. The fluid-filled vibration isolator according to claim 1. 第一の取付部材と第二の取付部材が本体ゴム弾性体によって弾性連結されており、壁部の一部が該本体ゴム弾性体で構成された主液室と壁部の一部が可撓性膜で構成された副液室とが形成されていると共に、それら主液室と副液室を隔てる仕切部材には少なくとも一部において外周面に開口する凹溝が形成されており、それら主液室と副液室を相互に連通するオリフィス通路が該凹溝によって形成されている流体封入式防振装置の製造方法であって、
軸方向一方の開口部が円筒状の開放端とされた筒状のダイヤフラムアウタ部材を準備する工程と、
該ダイヤフラムアウタ部材の軸方向他方の開口部を塞ぐように前記可撓性膜を形成すると共に、該ダイヤフラムアウタ部材の内周面を覆う内周シールゴム層を形成する工程と、
該内周シールゴム層で覆われた該ダイヤフラムアウタ部材の内周に前記仕切部材を差し入れた後、該ダイヤフラムアウタ部材を前記第二の取付部材の嵌着筒部に圧入して該ダイヤフラムアウタ部材を縮径することで、該ダイヤフラムアウタ部材を該仕切部材の外周面に該内周シールゴム層を介して押し付けて、該仕切部材に設けられた凹溝の外周開口を該ダイヤフラムアウタ部材によって流体密に塞ぐことで前記オリフィス通路を形成する工程と
を、有することを特徴とする流体封入式防振装置の製造方法。 The first mounting member and the second mounting member are elastically connected by a main rubber elastic body, and a part of the wall portion is composed of the main rubber elastic body and a part of the wall portion is flexible. Are formed in the partition member separating the main liquid chamber and the sub liquid chamber, and at least part of the groove is formed in the outer peripheral surface. A fluid-filled vibration isolator manufacturing method in which an orifice passage communicating with a liquid chamber and a sub liquid chamber is formed by the concave groove,
Preparing a cylindrical diaphragm outer member in which one opening in the axial direction is a cylindrical open end;
Forming the flexible film so as to close the other axial opening of the diaphragm outer member and forming an inner peripheral seal rubber layer covering the inner peripheral surface of the diaphragm outer member;
After the partition member is inserted into the inner periphery of the diaphragm outer member covered with the inner peripheral seal rubber layer, the diaphragm outer member is press-fitted into the fitting tube portion of the second mounting member, and the diaphragm outer member is By reducing the diameter, the diaphragm outer member is pressed against the outer peripheral surface of the partition member through the inner peripheral seal rubber layer, so that the outer peripheral opening of the concave groove provided in the partition member is fluid-tight by the diaphragm outer member. And a step of forming the orifice passage by closing. A method for manufacturing a fluid-filled vibration isolator.
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