JP2022087722A - Vibration insulation device - Google Patents

Vibration insulation device Download PDF

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JP2022087722A
JP2022087722A JP2020199831A JP2020199831A JP2022087722A JP 2022087722 A JP2022087722 A JP 2022087722A JP 2020199831 A JP2020199831 A JP 2020199831A JP 2020199831 A JP2020199831 A JP 2020199831A JP 2022087722 A JP2022087722 A JP 2022087722A
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rubber
opening window
stopper
mounting member
protruding
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JP7493437B2 (en
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賢治 黒田
Kenji Kuroda
恭宣 安田
Yasunobu Yasuda
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Sumitomo Riko Co Ltd
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Sumitomo Riko Co Ltd
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  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

To provide a vibration isolation device having a novel structure which can obtain a soft spring characteristic at the abutment of a stopper, and can prevent the generation of vibration, an impact or the like caused by abrupt highly-dynamic springiness.SOLUTION: In a vibration isolation device 10 in which a first attachment member 12 having a cylindrical part 18 into which an inner bracket 56 is inserted and fixed is connected to a second attachment member 14 by a main body rubber elastic body 16, and which has a stopper mechanism 80 having stopper rubber 42, an open window 28 penetrating a peripheral wall is formed at the cylindrical part 18, the stopper rubber 42 is constituted by including charging rubber 44 firmly adhering to an internal peripheral face of the open window 28 and blocking the open window 28, and protrusion rubber 46 protruding toward an outer periphery of the cylindrical part 18 from the charging rubber 44, and an area of a tip portion of the protrusion rubber 46 located above the open window 28 is set smaller than an area of the charging rubber 44 in the projection of the open window 28 in an insertion direction.SELECTED DRAWING: Figure 2

Description

本発明は、例えば自動車のエンジンマウントやモータマウント、デフマウントなどに用いられる防振装置に関するものである。 The present invention relates to a vibration isolator used for, for example, an automobile engine mount, a motor mount, a differential mount, and the like.

従来から、第一の取付部材と第二の取付部材が本体ゴム弾性体で連結された構造を有する防振装置が知られており、例えば車両用のマウントとして用いられている。また、特開2015-096754号公報(特許文献1)のように、第一の取付部材に設けられた筒状部に対して、インナブラケットが側方から挿入される構造の防振装置も提案されている。 Conventionally, a vibration isolator having a structure in which a first mounting member and a second mounting member are connected by a rubber elastic body of the main body is known, and is used as a mount for a vehicle, for example. Further, as in Japanese Patent Application Laid-Open No. 2015-096754 (Patent Document 1), a vibration isolator having a structure in which an inner bracket is inserted from the side into a tubular portion provided on the first mounting member is also proposed. Has been done.

ところで、防振装置は、第一の取付部材と第二の取付部材の相対的な変位量を制限するストッパ機構を設けて、本体ゴム弾性体の耐久性の向上を図る場合がある。特許文献1の構造では、第一の取付部材の筒状部の外周面にストッパゴムが固着されており、第一の取付部材の筒状部と第二の取付部材に固定されたアウタブラケットとがストッパゴムを介して当接することにより、ストッパ機構が構成される。 By the way, the vibration isolator may be provided with a stopper mechanism for limiting the relative displacement amount of the first mounting member and the second mounting member to improve the durability of the rubber elastic body of the main body. In the structure of Patent Document 1, a stopper rubber is fixed to the outer peripheral surface of the tubular portion of the first mounting member, and the tubular portion of the first mounting member and the outer bracket fixed to the second mounting member are used. The stopper mechanism is configured by abutting with the stopper rubber.

特開2015-096754号公報JP-A-2015-096754

しかしながら、特許文献1は、防振装置の配設スペースの制約等によって、第一の取付部材の筒状部とアウタブラケットとの対向間距離が制限される場合には、ストッパゴムの厚さを十分に確保することが難しくなることも考えられる。そのような場合には、ストッパゴムのばね定数がストッパ荷重の入力による圧縮によって急激に大きくなって、防振装置の急激な高動ばね化による振動や衝撃等が生じるおそれがあった。 However, in Patent Document 1, when the distance between the cylindrical portion of the first mounting member and the outer bracket is limited due to the limitation of the arrangement space of the vibration isolator, the thickness of the stopper rubber is increased. It may be difficult to secure enough. In such a case, the spring constant of the stopper rubber may suddenly increase due to compression due to the input of the stopper load, and vibration, impact, or the like may occur due to the sudden increase in the dynamic spring of the vibration isolator.

本発明の解決課題は、ストッパ当接時の柔らかいばね特性を実現して、急激な高動ばね化による振動や衝撃等の発生を防ぐことができる、新規な構造の防振装置を提供することにある。 The problem to be solved of the present invention is to provide a vibration isolator having a novel structure capable of realizing a soft spring characteristic at the time of contact with a stopper and preventing the generation of vibration, impact, etc. due to a sudden increase in high motion spring. It is in.

以下、本発明を把握するための好ましい態様について記載するが、以下に記載の各態様は、例示的に記載したものであって、適宜に互いに組み合わせて採用され得るだけでなく、各態様に記載の複数の構成要素についても、可能な限り独立して認識及び採用することができ、適宜に別の態様に記載の何れかの構成要素と組み合わせて採用することもできる。それによって、本発明では、以下に記載の態様に限定されることなく、種々の別態様が実現され得る。 Hereinafter, preferred embodiments for grasping the present invention will be described, but each of the embodiments described below is described as an example, and not only can be appropriately combined with each other and adopted, but also described in each embodiment. The plurality of components of the above can be recognized and adopted independently as much as possible, and can be appropriately adopted in combination with any of the components described in another embodiment. Thereby, in the present invention, various other embodiments can be realized without being limited to the embodiments described below.

第一の態様は、インナブラケットが挿入固定される筒状部を備えた第一の取付部材が第二の取付部材に対して本体ゴム弾性体によって連結されており、該第一の取付部材と該第二の取付部材側との該筒状部に固着されたストッパゴムを介した当接によって該第一の取付部材と該第二の取付部材の相対変位量を制限するストッパ機構が構成される防振装置であって、前記第一の取付部材の前記筒状部には周壁を貫通する開口窓が形成され、該開口窓の内周面に固着されて該開口窓を塞ぐ充填ゴムが設けられていると共に、該充填ゴムから該筒状部の外周へ向けて突出する突出ゴムが設けられて、それら充填ゴムと突出ゴムを含んで前記ストッパゴムが構成されており、該開口窓の貫通方向の投影において該開口窓上に位置する該突出ゴムの先端部分の面積が該充填ゴムの面積よりも小さくされているものである。 In the first aspect, the first mounting member provided with the tubular portion into which the inner bracket is inserted and fixed is connected to the second mounting member by the main body rubber elastic body, and is connected to the first mounting member. A stopper mechanism that limits the relative displacement between the first mounting member and the second mounting member is configured by contact with the second mounting member side via a stopper rubber fixed to the tubular portion. In the anti-vibration device, an opening window penetrating the peripheral wall is formed in the tubular portion of the first mounting member, and a filling rubber which is fixed to the inner peripheral surface of the opening window and closes the opening window is provided. In addition to being provided, a protruding rubber that protrudes from the filled rubber toward the outer periphery of the tubular portion is provided, and the stopper rubber is configured by including the filled rubber and the protruding rubber, and the opening window. The area of the tip portion of the protruding rubber located on the opening window in the projection in the penetration direction is smaller than the area of the filled rubber.

本態様に従う構造とされた防振装置によれば、ストッパゴムが筒状部の外周面から突出して設けられる場合に比して、ストッパゴムのストッパ当接方向の寸法が充填ゴムの分だけ大きくされる。それゆえ、ストッパゴムの当接時のばね定数が小さくされて、ストッパ当接時の急激な高動ばね化による振動や衝撃等の発生が回避される。 According to the anti-vibration device having a structure according to this aspect, the dimension of the stopper rubber in the stopper contact direction is larger by the amount of the filled rubber as compared with the case where the stopper rubber is provided so as to project from the outer peripheral surface of the tubular portion. Will be done. Therefore, the spring constant at the time of contact with the stopper rubber is reduced, and the generation of vibration, impact, etc. due to the sudden increase in high-speed spring at the time of contact with the stopper is avoided.

開口窓の貫通方向の投影において開口窓と重なる領域では、突出ゴムの面積が充填ゴムの面積よりも小さくされており、充填ゴムは突出ゴムから外れて位置する逃げ部を備えている。突出ゴムがアウタブラケットなどの第二の取付部材側に当接して充填ゴムが圧縮される際に、逃げ部において充填ゴムの膨出変形が許容されることから、充填ゴムが開口窓内で変形を制限された拘束状態(死にゴム)になり難い。それゆえ、ストッパゴムの圧縮に対して充填ゴムのばね定数の急激な増大が防止され、充填ゴムによるストッパゴムの緩衝性能の向上が有効に図られて、振動や衝撃等の発生を防ぐことができる。 In the region overlapping the opening window in the projection in the penetrating direction of the opening window, the area of the protruding rubber is smaller than the area of the filling rubber, and the filling rubber has a relief portion located away from the protruding rubber. When the protruding rubber comes into contact with the second mounting member such as the outer bracket and the filling rubber is compressed, the filling rubber is deformed in the opening window because the filling rubber is allowed to bulge and deform at the relief portion. It is difficult to be in a restricted restraint state (rubber to death). Therefore, it is possible to prevent a rapid increase in the spring constant of the filled rubber with respect to the compression of the stopper rubber, effectively improve the cushioning performance of the stopper rubber by the filled rubber, and prevent the occurrence of vibration, impact, etc. can.

第二の態様は、第一の態様に記載された防振装置において、前記筒状部の軸方向において前記開口窓の長さ寸法が該筒状部の長さ寸法の1/3倍以上且つ4/5倍以下とされているものである。 The second aspect is that in the vibration isolator described in the first aspect, the length dimension of the opening window in the axial direction of the tubular portion is 1/3 or more of the length dimension of the tubular portion. It is 4/5 times or less.

本態様に従う構造とされた防振装置によれば、開口窓が筒状部において十分な長さで設けられることにより、開口窓内に配される充填ゴムの面積を大きく得易くなって、ストッパゴムの受圧面を構成する突出ゴムの先端部分の面積を大きく得ることができる。開口窓が筒状部に対して長すぎないことにより、開口窓の形成による筒状部の強度の低下が抑えられて、例えばインナブラケットの挿入による筒状部の損傷が防止される。 According to the anti-vibration device having a structure according to this aspect, by providing the opening window with a sufficient length in the tubular portion, it becomes easy to obtain a large area of the filled rubber arranged in the opening window, and the stopper can be obtained. It is possible to obtain a large area of the tip portion of the protruding rubber constituting the pressure receiving surface of the rubber. Since the opening window is not too long with respect to the tubular portion, the decrease in strength of the tubular portion due to the formation of the opening window is suppressed, and damage to the tubular portion due to the insertion of the inner bracket, for example, is prevented.

第三の態様は、第二の態様に記載された防振装置において、前記筒状部が矩形筒状とされて、前記開口窓が該筒状部の側壁部に設けられており、該筒状部の周方向において該開口窓の幅寸法が該側壁部の幅寸法の1/2倍以上とされているものである。 The third aspect is that in the vibration isolator according to the second aspect, the tubular portion has a rectangular tubular shape, and the opening window is provided on the side wall portion of the tubular portion. The width dimension of the opening window is ½ or more of the width dimension of the side wall portion in the circumferential direction of the shaped portion.

本態様に従う構造とされた防振装置によれば、筒状部の側壁部において開口窓が十分に大きな幅寸法で設けられることにより、開口窓内に配される充填ゴムの面積を大きく得易くなって、ストッパゴムの受圧面を構成する突出ゴムの先端部分の面積を大きく得ることができる。 According to the anti-vibration device having a structure according to this aspect, it is easy to obtain a large area of the filled rubber arranged in the opening window by providing the opening window with a sufficiently large width dimension in the side wall portion of the tubular portion. Therefore, it is possible to obtain a large area of the tip portion of the protruding rubber constituting the pressure receiving surface of the stopper rubber.

第四の態様は、第一~第三の何れか1つの態様に記載された防振装置において、前記開口窓の開口形状が略四角形とされているものである。 The fourth aspect is that in the vibration isolator described in any one of the first to third aspects, the opening shape of the opening window is substantially quadrangular.

本態様に従う構造とされた防振装置によれば、開口形状が円形等の開口窓に比して、開口窓の開口面積を効率的に大きく確保できる。開口形状が四角形の開口窓を採用する場合には、ストッパゴムの突出ゴムも四角断面で突出する形状とされることが望ましく、充填ゴムによる柔らかいばね特性を実現しながら、ストッパ荷重の受圧面積を大きく確保することができる。 According to the vibration isolator having a structure according to this aspect, it is possible to efficiently secure a large opening area of the opening window as compared with an opening window having a circular opening shape or the like. When an opening window with a rectangular opening shape is adopted, it is desirable that the protruding rubber of the stopper rubber also has a shape that protrudes in a square cross section, and the pressure receiving area of the stopper load is increased while realizing the soft spring characteristics of the filled rubber. It can be secured to a large extent.

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防振装置において、前記開口窓の貫通方向の投影において該開口窓上に位置する前記突出ゴムの先端部分の面積が該突出ゴムの先端部分全体の面積に対して1/2倍以上とされているものである。 A fifth aspect is the area of the tip portion of the protruding rubber located on the opening window in the projection in the penetrating direction of the opening window in the vibration isolator according to any one of the first to fourth aspects. Is more than 1/2 times the area of the entire tip portion of the protruding rubber.

本態様に従う構造とされた防振装置によれば、突出ゴムの半分以上が開口窓上に位置することにより、ストッパゴムにおいて充填ゴムによる柔らかいばね特性を設定し易い開口窓上に位置する部分を、ストッパゴム全体のばね特性に大きく寄与させることができる。 According to the anti-vibration device having a structure according to this embodiment, since more than half of the protruding rubber is located on the opening window, the portion of the stopper rubber located on the opening window where the soft spring characteristics of the filled rubber can be easily set is provided. , It can greatly contribute to the spring characteristics of the entire stopper rubber.

第六の態様は、第一~第五の何れか1つの態様に記載された防振装置において、前記筒状部の内周面を覆う嵌合ゴムが設けられており、該嵌合ゴムが前記充填ゴムと一体的に設けられて前記ストッパゴムを構成しているものである。 A sixth aspect is that in the vibration isolator according to any one of the first to fifth aspects, a fitting rubber covering the inner peripheral surface of the tubular portion is provided, and the fitting rubber is provided. It is provided integrally with the filling rubber to form the stopper rubber.

本態様に従う構造とされた防振装置によれば、筒状部の内周面が嵌合ゴムによって覆われていることから、インナブラケットを筒状部に対して挿通固定する際に、インナブラケットの筒状部に対するかじりなどが防止されて、組付け作業が容易になる。また、ストッパ荷重の入力方向におけるストッパゴムの高さ寸法が、筒状部の開口窓内に配される充填ゴムと、筒状部の外周に配される突出ゴムと、筒状部の内周に配される嵌合ゴムとによって、一層大きく確保され易くなる。 According to the anti-vibration device having a structure according to this aspect, since the inner peripheral surface of the tubular portion is covered with the fitting rubber, the inner bracket is used when the inner bracket is inserted and fixed to the tubular portion. It is possible to prevent galling of the tubular part and facilitate the assembly work. Further, the height dimension of the stopper rubber in the input direction of the stopper load is the filling rubber arranged in the opening window of the tubular portion, the protruding rubber arranged on the outer periphery of the tubular portion, and the inner circumference of the tubular portion. With the fitting rubber arranged in, it becomes easier to secure a larger size.

本発明によれば、ストッパ当接時の柔らかいばね特性を実現して、急激な高動ばね化による振動や衝撃等の発生を防ぐことができる。 According to the present invention, it is possible to realize a soft spring characteristic at the time of contact with the stopper and prevent the generation of vibration, impact, etc. due to the sudden increase in high motion spring.

本発明の第一の実施形態としてのエンジンマウントをブラケットの装着状態で示す斜視図A perspective view showing an engine mount as a first embodiment of the present invention in a state where a bracket is attached. 図1に示すブラケット付きのエンジンマウントの断面図であって、図3のII-II断面に相当する図FIG. 1 is a cross-sectional view of an engine mount with a bracket shown in FIG. 1, which corresponds to a cross section of II-II in FIG. 図2のIII-III断面図Section III-III sectional view of FIG. 図2のIV-IV断面図IV-IV sectional view of FIG. 図1に示すエンジンマウントの斜視図Perspective view of the engine mount shown in FIG. 図5に示すエンジンマウントを構成するインナ軸部材の斜視図Perspective view of the inner shaft member constituting the engine mount shown in FIG. 図6に示すインナ軸部材の右側面図Right side view of the inner shaft member shown in FIG. 図5に示すエンジンマウントの部分的な右側面図Partial right side view of the engine mount shown in FIG. 本発明の別の一実施形態としてのエンジンマウントの部分的な右側面図Partial right side view of the engine mount as another embodiment of the present invention

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。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図1~図4には、本発明に従う構造とされた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が後述するブラケット56,58を装着された状態で示されている。エンジンマウント10は、図5にも示すように、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によって弾性連結された構造を有している。また、以下の説明において、原則として、上下方向とはマウント軸方向である図2中の上下方向を、左右方向とは図2中の左右方向を、それぞれ言う。 1 to 4 show, as the first embodiment of the vibration isolator having a structure according to the present invention, an engine mount 10 for an automobile is attached with brackets 56 and 58 described later. As shown in FIG. 5, the engine mount 10 has a structure in which the first mounting member 12 and the second mounting member 14 are elastically connected by the main body rubber elastic body 16. Further, in the following description, as a general rule, the vertical direction refers to the vertical direction in FIG. 2, which is the mount axis direction, and the horizontal direction refers to the horizontal direction in FIG. 2.

第一の取付部材12は、図6に示すように、軸直角方向に延びる筒状部18を備えている。筒状部18は、全体として略矩形筒状とされている。筒状部18の周壁は、一対の側壁部20,20と、側壁部20,20の上端を相互につなぐ上壁部22と、側壁部20,20の下端を相互につなぐ下壁部24とを、備えている。側壁部20,20と上壁部22及び下壁部24は、角をなすことなく滑らかに連続しており、筒状部18の軸直角方向の断面形状が略角丸矩形状とされている。筒状部18の下壁部24には、円形孔が貫通形成されており、当該円形孔の周囲から下方へ向けて延び出す筒状の固着部26が筒状部18と一体で設けられている。なお、筒状部18と固着部26を一体で備える第一の取付部材12は、例えば、金属板材のプレス加工によって得ることができる。 As shown in FIG. 6, the first mounting member 12 includes a tubular portion 18 extending in a direction perpendicular to the axis. The tubular portion 18 has a substantially rectangular tubular shape as a whole. The peripheral wall of the tubular portion 18 includes a pair of side wall portions 20, 20, an upper wall portion 22 that connects the upper ends of the side wall portions 20, 20 to each other, and a lower wall portion 24 that connects the lower ends of the side wall portions 20, 20 to each other. Is equipped. The side wall portions 20, 20 and the upper wall portion 22 and the lower wall portion 24 are smoothly continuous without forming corners, and the cross-sectional shape of the tubular portion 18 in the direction perpendicular to the axis is a substantially rounded rectangular shape. .. A circular hole is formed through the lower wall portion 24 of the tubular portion 18, and a tubular fixing portion 26 extending downward from the periphery of the circular hole is provided integrally with the tubular portion 18. There is. The first mounting member 12 including the tubular portion 18 and the fixing portion 26 integrally can be obtained, for example, by pressing a metal plate material.

筒状部18は、図6,図7に示すように、側壁部20を貫通する開口窓28を備えている。開口窓28は、側壁部20の中央部分を一対の側壁部20,20の対向方向(図7中の紙面直交方向である左右方向)に貫通している。開口窓28は、角を丸められた略四角形の開口形状を有している。開口窓28は、長さ寸法(筒状部18の軸方向である図7中の左右方向の寸法)L1が、幅寸法(筒状部18の周方向である図7中の上下方向の寸法)W1よりも大きくされた略長方形の開口形状を有している。開口窓28の長さ寸法L1は、好適には、筒状部18の軸方向の長さ寸法L2に対して、1/3倍以上且つ4/5倍以下とされている。開口窓28の幅寸法W1は、好適には、筒状部18の周方向における側壁部20の幅寸法W2に対して、1/2倍以上とされている。これらによって、開口窓28の開口面積を大きく得ながら、開口窓28の形成による筒状部18の強度の低下を抑えることができる。なお、本実施形態において、開口窓28は一対の側壁部20,20にそれぞれ設けられており、それら開口窓28,28が略同じ形状及び大きさとされている。 As shown in FIGS. 6 and 7, the tubular portion 18 includes an opening window 28 penetrating the side wall portion 20. The opening window 28 penetrates the central portion of the side wall portion 20 in the facing direction of the pair of side wall portions 20, 20 (the left-right direction which is the direction orthogonal to the paper surface in FIG. 7). The opening window 28 has a substantially quadrangular opening shape with rounded corners. The opening window 28 has a length dimension (dimension in the left-right direction in FIG. 7 which is the axial direction of the tubular portion 18) L1 and a width dimension (dimension in the vertical direction in FIG. 7 which is the circumferential direction of the tubular portion 18). ) It has a substantially rectangular opening shape larger than W1. The length dimension L1 of the opening window 28 is preferably 1/3 times or more and 4/5 times or less with respect to the axial length dimension L2 of the tubular portion 18. The width dimension W1 of the opening window 28 is preferably ½ times or more the width dimension W2 of the side wall portion 20 in the circumferential direction of the tubular portion 18. As a result, it is possible to suppress a decrease in the strength of the tubular portion 18 due to the formation of the opening window 28 while obtaining a large opening area of the opening window 28. In the present embodiment, the opening windows 28 are provided on the pair of side wall portions 20, 20, respectively, and the opening windows 28, 28 have substantially the same shape and size.

第二の取付部材14は、図2,図3に示すように、略円筒形状とされており、下端部には内周へ向けて突出する内フランジ状部30が設けられている。第二の取付部材14は、第一の取付部材12に対して略同一中心軸上で下方に配されており、それら第一の取付部材12と第二の取付部材14の間に本体ゴム弾性体16が配されている。 As shown in FIGS. 2 and 3, the second mounting member 14 has a substantially cylindrical shape, and an inner flange-shaped portion 30 projecting toward the inner circumference is provided at the lower end portion. The second mounting member 14 is arranged downward on substantially the same central axis with respect to the first mounting member 12, and the main body rubber elasticity is provided between the first mounting member 12 and the second mounting member 14. The body 16 is arranged.

本体ゴム弾性体16は、略円錐台形状とされており、小径側である上部が第一の取付部材12の固着部26に加硫接着されていると共に、大径側である下部の外周面が第二の取付部材14に加硫接着されている。本体ゴム弾性体16は、下面に開口して上方へ向けて小径となる凹所32を備えている。凹所32は、第一の取付部材12の固着部26よりも下方に位置しており、第二の取付部材14の内フランジ状部30よりも内周において下方へ開放されている。 The main body rubber elastic body 16 has a substantially truncated cone shape, and the upper portion on the small diameter side is vulcanized and adhered to the fixing portion 26 of the first mounting member 12, and the outer peripheral surface of the lower portion on the large diameter side. Is vulcanized and adhered to the second mounting member 14. The main body rubber elastic body 16 is provided with a recess 32 that opens to the lower surface and has a small diameter upward. The recess 32 is located below the fixing portion 26 of the first mounting member 12, and is opened downward on the inner circumference of the inner flange-shaped portion 30 of the second mounting member 14.

第一の取付部材12の内側には、本体ゴム弾性体16と一体形成された嵌合ゴム34が固着されている。嵌合ゴム34は、筒状部18の内周面を被覆していると共に、固着部26の内周に充填されており、筒状部18の内周を貫通するブラケット装着孔36を備えている。 A fitting rubber 34 integrally formed with the main body rubber elastic body 16 is fixed to the inside of the first mounting member 12. The fitting rubber 34 covers the inner peripheral surface of the tubular portion 18, is filled in the inner circumference of the fixing portion 26, and is provided with a bracket mounting hole 36 that penetrates the inner circumference of the tubular portion 18. There is.

第一の取付部材12の筒状部18の上壁部22には、上方ストッパゴム38が固着されている。上方ストッパゴム38は、略四角形断面を有しており、上壁部22の上面から上方へ向けて突出している。上方ストッパゴム38は、上方へ向けて次第に収縮するテーパ形状とされている。上方ストッパゴム38は、先端面に筒状部18の軸方向へ直線的に延びる凹溝40が形成されており、後述するストッパ当接時に凹溝40による先端面の凹凸が緩衝作用を発揮するようになっている。 An upper stopper rubber 38 is fixed to the upper wall portion 22 of the tubular portion 18 of the first mounting member 12. The upper stopper rubber 38 has a substantially quadrangular cross section, and protrudes upward from the upper surface of the upper wall portion 22. The upper stopper rubber 38 has a tapered shape that gradually contracts upward. The upper stopper rubber 38 is formed with a concave groove 40 extending linearly in the axial direction of the tubular portion 18 on the tip surface, and the unevenness of the tip surface due to the concave groove 40 exerts a buffering action when the stopper is contacted, which will be described later. It has become like.

第一の取付部材12の筒状部18の側壁部20には、ストッパゴムとしての側方ストッパゴム42が固着されている。側方ストッパゴム42は、開口窓28の内周面に固着されて開口窓28を塞ぐように設けられた充填ゴム44と、充填ゴム44から筒状部18の外周へ向けて突出する突出ゴム46とを、備えている。 A side stopper rubber 42 as a stopper rubber is fixed to the side wall portion 20 of the tubular portion 18 of the first mounting member 12. The side stopper rubber 42 includes a filling rubber 44 that is fixed to the inner peripheral surface of the opening window 28 and is provided so as to close the opening window 28, and a protruding rubber that protrudes from the filling rubber 44 toward the outer periphery of the tubular portion 18. It is equipped with 46.

充填ゴム44は、開口窓28の内周を充填している。充填ゴム44は、本実施形態では嵌合ゴム34と一体形成されている。そして、嵌合ゴム34は、開口窓28の貫通方向(図2中の左右方向)の投影において充填ゴム44と重なる部分が、側方ストッパゴム42を構成している。本実施形態の充填ゴム44は、開口窓28の内周領域全体に充填されているが、例えば、開口窓28の貫通方向の長さよりも薄肉とされていてもよい。 The filling rubber 44 fills the inner circumference of the opening window 28. The filled rubber 44 is integrally formed with the fitting rubber 34 in this embodiment. The portion of the fitting rubber 34 that overlaps with the filling rubber 44 in the projection in the penetrating direction (left-right direction in FIG. 2) of the opening window 28 constitutes the side stopper rubber 42. The filled rubber 44 of the present embodiment is filled in the entire inner peripheral region of the opening window 28, but may be thinner than the length in the penetrating direction of the opening window 28, for example.

突出ゴム46は、略矩形ブロック状のゴム弾性体であって、筒状部18の外周面から外周へ向けて突出している。本実施形態の突出ゴム46は、実質的に全体が開口窓28上に位置して、充填ゴム44とつながっている。突出ゴム46は、一対の側壁部20,20の対向方向の外面にそれぞれ設けられており、一対の側壁部20,20の対向方向の外側へ向けて直線的に突出している。突出ゴム46の先端面は、筒状部18の軸方向に延びる複数の凹溝48が形成されており、後述するストッパ当接時に凹溝48による先端面の凹凸が緩衝作用を発揮するようになっている。 The protruding rubber 46 is a rubber elastic body having a substantially rectangular block shape, and protrudes from the outer peripheral surface of the tubular portion 18 toward the outer peripheral surface. The protruding rubber 46 of the present embodiment is substantially entirely located on the opening window 28 and is connected to the filling rubber 44. The protruding rubbers 46 are provided on the outer surfaces of the pair of side wall portions 20 and 20 in the facing direction, respectively, and project linearly toward the outside of the pair of side wall portions 20 and 20 in the facing direction. The tip surface of the protruding rubber 46 is formed with a plurality of concave grooves 48 extending in the axial direction of the tubular portion 18, so that the unevenness of the tip surface due to the concave grooves 48 exerts a buffering action when the stopper is contacted, which will be described later. It has become.

充填ゴム44と突出ゴム46と嵌合ゴム34とによって、側方ストッパゴム42が構成されている。側方ストッパゴム42は、開口窓28を通じて筒状部18を貫通して設けられており、開口窓28の貫通方向における高さ寸法Hが大きくされている。 The side stopper rubber 42 is composed of the filling rubber 44, the protruding rubber 46, and the fitting rubber 34. The side stopper rubber 42 is provided so as to penetrate the tubular portion 18 through the opening window 28, and the height dimension H in the penetrating direction of the opening window 28 is increased.

図8に示す開口窓28の貫通方向(図2中の左右方向)の投影において、突出ゴム46の先端部分の面積Aは、充填ゴム44の面積Bよりも小さくされている。これにより、充填ゴム44は、開口窓28の貫通方向の投影において突出ゴム46の先端部分と重なる受圧部50と、受圧部50を外れて位置する逃げ部52とを、備えている。本実施形態では、後述する被覆ゴム54よりも左右方向の外側へ突出した突出ゴム46の先端部分の全体が、開口窓28の貫通方向の投影において開口窓28の開口上に位置していることから、突出ゴム46の先端部分全体の面積Aが、突出ゴム46の先端部分における開口窓28上に位置する部分の面積と同じとされている。なお、例えば 突出ゴム46の先端部分が部分的に開口窓28から外方にまではみ出すように広がっており、突出ゴム46の先端部分が部分的に開口窓28上に位置している場合には、突出ゴム46の先端部分における開口窓28上に位置する部分の面積が、開口窓28の開口面積B、即ち充填ゴム44の面積Bよりも小さくされる。 In the projection in the penetrating direction (left-right direction in FIG. 2) of the opening window 28 shown in FIG. 8, the area A of the tip portion of the protruding rubber 46 is made smaller than the area B of the filled rubber 44. As a result, the filled rubber 44 includes a pressure receiving portion 50 that overlaps with the tip portion of the protruding rubber 46 in projection in the penetrating direction of the opening window 28, and a relief portion 52 that is located outside the pressure receiving portion 50. In the present embodiment, the entire tip portion of the protruding rubber 46 protruding outward in the left-right direction from the covering rubber 54 described later is located on the opening of the opening window 28 in the projection in the penetrating direction of the opening window 28. Therefore, the area A of the entire tip portion of the protruding rubber 46 is the same as the area of the portion of the tip portion of the protruding rubber 46 located on the opening window 28. For example, when the tip portion of the protruding rubber 46 partially extends outward from the opening window 28 and the tip portion of the protruding rubber 46 is partially located on the opening window 28. The area of the portion of the tip of the protruding rubber 46 located on the opening window 28 is made smaller than the opening area B of the opening window 28, that is, the area B of the filled rubber 44.

本実施形態では、突出ゴム46の先端部分の長さ寸法L3が開口窓28の長さ寸法L1よりも小さくされていると共に、突出ゴム46の先端部分の幅寸法W3が開口窓28の幅寸法W1よりも小さくされている。これにより、開口窓28を充填する充填ゴム44には、開口窓28の貫通方向の投影において突出ゴム46の先端部分と重ならない逃げ部52が、開口窓28の周方向の全周にわたって環状に連続して設けられている。 In the present embodiment, the length dimension L3 of the tip portion of the protruding rubber 46 is smaller than the length dimension L1 of the opening window 28, and the width dimension W3 of the tip portion of the protruding rubber 46 is the width dimension of the opening window 28. It is made smaller than W1. As a result, in the filling rubber 44 that fills the opening window 28, the relief portion 52 that does not overlap with the tip portion of the protruding rubber 46 in the projection in the penetrating direction of the opening window 28 is annularly formed over the entire circumference of the opening window 28 in the circumferential direction. It is provided continuously.

なお、本実施形態の突出ゴム46は、基端部分が基端へ向けて拡幅する傾斜形状とされており、当該拡幅部分の一部が開口窓28上を外れて位置している。しかしながら、当該拡幅部分は、ストッパ荷重が作用してストッパゴムを構成する部分ではなく、応力集中の緩和などの目的で設けられていることから、突出ゴム46は、実質的な全体が開口窓28上に位置するとみなすことができる。また、突出ゴム46の当該拡幅部分は、後述するストッパ荷重の入力状態において、充填ゴム44の逃げ部52の膨出変形を許容する。 The protruding rubber 46 of the present embodiment has an inclined shape in which the base end portion widens toward the base end, and a part of the widened portion is located outside the opening window 28. However, since the widened portion is not a portion on which the stopper load acts to form the stopper rubber but is provided for the purpose of alleviating stress concentration, the protruding rubber 46 is substantially entirely the opening window 28. It can be considered to be located above. Further, the widened portion of the protruding rubber 46 allows the bulging deformation of the relief portion 52 of the filling rubber 44 in the input state of the stopper load described later.

上方ストッパゴム38と側方ストッパゴム42は、相互に一体的に設けられていると共に、何れも本体ゴム弾性体16と一体形成されている。即ち、本体ゴム弾性体16と一体形成された被覆ゴム54が筒状部18を覆って設けられており、被覆ゴム54の一部を含んで上方ストッパゴム38と側方ストッパゴム42が被覆ゴム54によって一体的に連結されている。上方ストッパゴム38と側方ストッパゴム42は、被覆ゴム54よりも筒状部18の外周側へ突出しており、先端部分が被覆ゴム54よりも筒状部18の外周側に位置している。もっとも、上方ストッパゴム38と側方ストッパゴム42は、互いに独立して設けられていてもよいし、本体ゴム弾性体16と一体でなくてもよい。 The upper stopper rubber 38 and the side stopper rubber 42 are integrally provided with each other, and both are integrally formed with the main body rubber elastic body 16. That is, a coated rubber 54 integrally formed with the main body rubber elastic body 16 is provided so as to cover the tubular portion 18, and the upper stopper rubber 38 and the side stopper rubber 42 include a part of the coated rubber 54. They are integrally connected by 54. The upper stopper rubber 38 and the side stopper rubber 42 project to the outer peripheral side of the tubular portion 18 from the covering rubber 54, and the tip portion is located on the outer peripheral side of the tubular portion 18 from the covering rubber 54. However, the upper stopper rubber 38 and the side stopper rubber 42 may be provided independently of each other, or may not be integrated with the main body rubber elastic body 16.

エンジンマウント10は、第一の取付部材12がインナブラケット56を介し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がアウタブラケット58を介して図示しない車両ボデーに取り付けられる。 In the engine mount 10, the first mounting member 12 is mounted to a power unit (not shown) via the inner bracket 56, and the second mounting member 14 is mounted to a vehicle body (not shown) via the outer bracket 58.

インナブラケット56は、鉄等で形成された高剛性の部材であって、図3,図4に示すように、略矩形ロッド状の嵌合部60と、嵌合部60の一端に一体形成された取付部62とを、備えている。嵌合部60は、筒状部18の内周面形状と対応する外周面形状を有しており、嵌合ゴム34のブラケット装着孔36へ挿通されることによって、第一の取付部材12の筒状部18に固定される。取付部62は、上下方向に貫通する複数のボルト穴64を備えており、ボルト穴64に挿通される図示しないボルトによって、パワーユニットに固定される。 The inner bracket 56 is a highly rigid member made of iron or the like, and is integrally formed with a substantially rectangular rod-shaped fitting portion 60 and one end of the fitting portion 60, as shown in FIGS. 3 and 4. It is provided with a mounting portion 62. The fitting portion 60 has an outer peripheral surface shape corresponding to the inner peripheral surface shape of the tubular portion 18, and is inserted into the bracket mounting hole 36 of the fitting rubber 34 to form the first mounting member 12. It is fixed to the tubular portion 18. The mounting portion 62 includes a plurality of bolt holes 64 penetrating in the vertical direction, and is fixed to the power unit by bolts (not shown) inserted through the bolt holes 64.

アウタブラケット58は、鉄等で形成された高剛性の部材であって、第二の取付部材14に外嵌固定される筒状装着部66と、筒状装着部66に溶接等の手段で固定された門形部68とを、備えている。門形部68は、筒状装着部66の外周面に固定される一対の側方脚部70,70と、側方脚部70,70の上端を相互につなぐ上方連結部72とを、備えている。一対の側方脚部70,70は、それぞれ下端部に取付片74を備えており、取付片74を貫通するボルト穴76に挿通された図示しないボルトによって、車両ボデーに固定される。門形部68の上方連結部72は、筒状装着部66に取り付けられたエンジンマウント10の上方を跨いで配されており、上方ストッパゴム38の先端面が上方連結部72に対して離れて対向している。門形部68の側方脚部70,70は、筒状部18の側壁部20,20と対向する左右方向の両外側に配されており、側方ストッパゴム42,42の先端面が側方脚部70,70に対して離れて対向している。側方脚部70における側方ストッパゴム42に対する対向面は、左右方向に対して略直交して広がる平面とされており、側方ストッパゴム42の突出ゴム46の先端面と略平行に対向している。なお、門形部68は、溝形断面で延びており、溝幅方向(図3中の左右方向)の両端部には、外側へ向けて突出して溝形断面の側壁を構成する補強リブ77がそれぞれ設けられて、ストッパ荷重の入力に対する門形部68の耐荷重性の向上が図られている。補強リブ77は、門形部68の両端に設けられた取付片74,74まで連続して延びている。 The outer bracket 58 is a highly rigid member made of iron or the like, and is fixed to the cylindrical mounting portion 66 externally fitted and fixed to the second mounting member 14 and to the tubular mounting portion 66 by means such as welding. It is equipped with a gate-shaped portion 68 that has been welded. The portal portion 68 includes a pair of side leg portions 70, 70 fixed to the outer peripheral surface of the tubular mounting portion 66, and an upper connecting portion 72 that connects the upper ends of the side leg portions 70, 70 to each other. ing. The pair of side legs 70, 70 each have a mounting piece 74 at the lower end thereof, and is fixed to the vehicle body by a bolt (not shown) inserted into a bolt hole 76 penetrating the mounting piece 74. The upper connecting portion 72 of the portal portion 68 is arranged so as to straddle the upper part of the engine mount 10 attached to the tubular mounting portion 66, and the tip surface of the upper stopper rubber 38 is separated from the upper connecting portion 72. Facing each other. The side leg portions 70, 70 of the portal portion 68 are arranged on both outer sides in the left-right direction facing the side wall portions 20, 20 of the tubular portion 18, and the tip surfaces of the side stopper rubbers 42, 42 are on the side. It faces the square legs 70, 70 apart from each other. The surface of the side leg 70 facing the side stopper rubber 42 is a flat surface extending substantially orthogonal to the left-right direction, and faces the tip surface of the protruding rubber 46 of the side stopper rubber 42 substantially parallel to the surface. ing. The gate-shaped portion 68 extends in a groove-shaped cross section, and at both ends in the groove width direction (left-right direction in FIG. 3), reinforcing ribs 77 projecting outward to form a side wall of the groove-shaped cross section. Are provided to improve the load bearing capacity of the portal portion 68 with respect to the input of the stopper load. The reinforcing rib 77 continuously extends to the mounting pieces 74 and 74 provided at both ends of the portal portion 68.

エンジンマウント10の車両への装着状態において、第一の取付部材12と第二の取付部材14の間へ防振対象振動が上下方向に入力されると、第一の取付部材12と第二の取付部材14を連結する本体ゴム弾性体16が弾性変形して、本体ゴム弾性体16の内部摩擦によるエネルギー減衰作用や低動ばねによる振動絶縁作用等に基づいて、目的とする防振効果が発揮される。 When the vibration isolation target vibration is input in the vertical direction between the first mounting member 12 and the second mounting member 14 in the mounted state of the engine mount 10 on the vehicle, the first mounting member 12 and the second mounting member 12 The main body rubber elastic body 16 connecting the mounting member 14 is elastically deformed, and the desired anti-vibration effect is exhibited based on the energy damping action due to the internal friction of the main body rubber elastic body 16 and the vibration insulation action due to the low motion spring. Will be done.

著しく振幅の大きな上下方向の振動が入力されて、第一の取付部材12が第二の取付部材14に対して上方へ大きく変位すると、第一の取付部材12の筒状部18の上壁部22と、第二の取付部材14に固定されたアウタブラケット58の上方連結部72とが、上方ストッパゴム38を介して間接的に当接する。これにより、第一の取付部材12と第二の取付部材14の相対変位量が制限されて、本体ゴム弾性体16の過大な変形による損傷などが回避される。このように、エンジンマウント10は、車両への装着状態において第一の取付部材12の第二の取付部材14に対する上方への相対変位量を制限する上部ストッパ機構78が、筒状部18の上壁部22とアウタブラケット58の上方連結部72との上方ストッパゴム38を介した当接によって構成される。 When vertical vibration with a significantly large amplitude is input and the first mounting member 12 is largely displaced upward with respect to the second mounting member 14, the upper wall portion of the tubular portion 18 of the first mounting member 12 22 and the upper connecting portion 72 of the outer bracket 58 fixed to the second mounting member 14 are indirectly in contact with each other via the upper stopper rubber 38. As a result, the relative displacement amount of the first mounting member 12 and the second mounting member 14 is limited, and damage due to excessive deformation of the main body rubber elastic body 16 is avoided. As described above, in the engine mount 10, the upper stopper mechanism 78 that limits the amount of upward relative displacement of the first mounting member 12 with respect to the second mounting member 14 in the mounted state on the vehicle is on the tubular portion 18. It is configured by contact between the wall portion 22 and the upper connecting portion 72 of the outer bracket 58 via the upper stopper rubber 38.

また、著しく振幅の大きな左右方向の振動が入力されて、第一の取付部材12が第二の取付部材14に対して左右方向へ大きく変位すると、第一の取付部材12の筒状部18に嵌合されたインナブラケット56の嵌合部60と、第二の取付部材14に固定されたアウタブラケット58の側方脚部70とが、側方ストッパゴム42を介して間接的に当接する。これにより、第一の取付部材12と第二の取付部材14の相対変位量が制限されて、本体ゴム弾性体16の過大な変形による損傷などが回避される。このように、第一の取付部材12の第二の取付部材14に対する左右方向への相対変位量を制限するストッパ機構としての側部ストッパ機構80が、インナブラケット56の嵌合部60とアウタブラケット58の側方脚部70との側方ストッパゴム42を介した当接によって構成される。本実施形態において、側部ストッパ機構80は、左右両側に設けられている。 Further, when a vibration in the left-right direction having a remarkably large amplitude is input and the first mounting member 12 is largely displaced in the left-right direction with respect to the second mounting member 14, the tubular portion 18 of the first mounting member 12 is subjected to. The fitting portion 60 of the fitted inner bracket 56 and the side leg portion 70 of the outer bracket 58 fixed to the second mounting member 14 are indirectly in contact with each other via the side stopper rubber 42. As a result, the relative displacement amount of the first mounting member 12 and the second mounting member 14 is limited, and damage due to excessive deformation of the main body rubber elastic body 16 is avoided. As described above, the side stopper mechanism 80 as a stopper mechanism for limiting the amount of relative displacement of the first mounting member 12 to the second mounting member 14 in the left-right direction is the fitting portion 60 of the inner bracket 56 and the outer bracket. It is configured by contact with the side leg 70 of 58 via the side stopper rubber 42. In the present embodiment, the side stopper mechanism 80 is provided on both the left and right sides.

側部ストッパ機構80を構成する側方ストッパゴム42は、筒状部18の開口窓28を貫通して設けられており、インナブラケット56の嵌合部60に重ね合わされている。それゆえ、筒状部の側壁部の外面に重ね合わされた状態で設けられる従来構造の側方ストッパゴムに比して、ストッパ荷重の入力方向における側方ストッパゴム42の高さ寸法Hが、充填ゴム44と嵌合ゴム34の分だけ大きくされている。これにより、ストッパ荷重の入力初期における側方ストッパゴム42のばね定数を小さくすることができて、側方ストッパゴム42の当接初期の柔らかいばね特性を実現することができる。その結果、側方ストッパゴム42の先端部分がアウタブラケット58に当接するストッパ当接時に、エンジンマウント10のばね特性の急激な変化が回避されて、ストッパ当接時の振動や衝撃の発生が回避される。 The side stopper rubber 42 constituting the side stopper mechanism 80 is provided so as to penetrate the opening window 28 of the tubular portion 18 and is overlapped with the fitting portion 60 of the inner bracket 56. Therefore, the height dimension H of the side stopper rubber 42 in the input direction of the stopper load is filled as compared with the side stopper rubber of the conventional structure provided in a state of being overlapped on the outer surface of the side wall portion of the tubular portion. It is increased by the amount of the rubber 44 and the fitting rubber 34. As a result, the spring constant of the side stopper rubber 42 at the initial stage of inputting the stopper load can be reduced, and the soft spring characteristics at the initial stage of contact of the side stopper rubber 42 can be realized. As a result, when the tip portion of the side stopper rubber 42 abuts on the outer bracket 58, abrupt changes in the spring characteristics of the engine mount 10 are avoided, and vibration and impact are avoided when the stopper abuts. Will be done.

側方ストッパゴム42の突出ゴム46は、先端部分のアウタブラケット58への当接面積Aが、開口窓28の貫通方向(ストッパ荷重の入力方向)の投影において、開口窓28に充填された充填ゴム44の面積Bよりも小さくされている。これにより、充填ゴム44は、突出ゴム46と一体的に側方ストッパゴム42を構成する受圧部50だけでなく、受圧部50を外れた逃げ部52が設けられている。そして、突出ゴム46にストッパ荷重が入力されると、受圧部50がストッパ荷重によって入力方向で圧縮され、受圧部50がストッパ荷重の入力方向と直交する方向へ膨出変形しようとする。この受圧部50の膨出変形は、受圧部50の周囲に位置する逃げ部52の変形によって許容され、逃げ部52が自由表面である左右外面において膨出変形する。要するに、逃げ部52の膨出変形が左右外面において許容されていることによって、ストッパ荷重の入力方向における受圧部50のばね定数が小さくされており、受圧部50を含む側方ストッパゴム42の低ばね化が図られている。従って、側方ストッパゴム42のアウタブラケット58への当接に際して、ばね定数の小さい側方ストッパゴム42による優れた緩衝作用が発揮されて、当接時の振動や衝撃が低減される。 The protruding rubber 46 of the side stopper rubber 42 is filled so that the contact area A of the tip portion with the outer bracket 58 is filled in the opening window 28 in the projection in the penetration direction (stopper load input direction) of the opening window 28. It is made smaller than the area B of the rubber 44. As a result, the filled rubber 44 is provided with not only a pressure receiving portion 50 that integrally constitutes the side stopper rubber 42 with the protruding rubber 46, but also a relief portion 52 that is detached from the pressure receiving portion 50. Then, when the stopper load is input to the protruding rubber 46, the pressure receiving portion 50 is compressed in the input direction by the stopper load, and the pressure receiving portion 50 tends to bulge and deform in the direction orthogonal to the input direction of the stopper load. The bulging deformation of the pressure receiving portion 50 is allowed by the deformation of the relief portion 52 located around the pressure receiving portion 50, and the bulging deformation is performed on the left and right outer surfaces where the relief portion 52 is a free surface. In short, since the bulging deformation of the relief portion 52 is allowed on the left and right outer surfaces, the spring constant of the pressure receiving portion 50 in the input direction of the stopper load is reduced, and the side stopper rubber 42 including the pressure receiving portion 50 is low. Spring is planned. Therefore, when the side stopper rubber 42 comes into contact with the outer bracket 58, the side stopper rubber 42 having a small spring constant exerts an excellent buffering action, and vibration and impact at the time of contact are reduced.

本実施形態の側方ストッパゴム42は、嵌合ゴム34の一部を含むことによって高さ寸法Hがより大きくされており、緩衝性能の向上が図られている。また、嵌合ゴム34が充填ゴム44の逃げ部52につながっていることから、充填ゴム44の受圧部50と同様にして嵌合ゴム34の低ばね化が図られており、側方ストッパゴム42の優れた緩衝性能が有効に発揮される。 The side stopper rubber 42 of the present embodiment has a higher height dimension H by including a part of the fitting rubber 34, and the cushioning performance is improved. Further, since the fitting rubber 34 is connected to the relief portion 52 of the filling rubber 44, the spring of the fitting rubber 34 is reduced in the same manner as the pressure receiving portion 50 of the filling rubber 44, and the side stopper rubber is used. The excellent cushioning performance of 42 is effectively exhibited.

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、前記実施形態では、側部ストッパ機構80に本発明構造が適用された例を示したが、例えば、上部ストッパ機構78に本発明構造を適用することもできる。 Although the embodiments of the present invention have been described in detail above, the present invention is not limited by the specific description thereof. For example, in the above embodiment, the structure of the present invention is applied to the side stopper mechanism 80, but for example, the structure of the present invention can be applied to the upper stopper mechanism 78.

開口窓28の開口形状は、略四角形状に限定されるものではなく、例えば、円形、四角以外の多角形、異形などであってもよい。また、ストッパゴム42の突出ゴム46の突出方向と直交する方向の断面形状は、略四角形状に限定されず、例えば、円形、四角以外の多角形、異形などであってもよい。なお、開口窓28の開口形状と突出ゴム46の突出方向と直交する方向の断面形状は、互いに対応することが望ましいが、互いに異なる形状であってもよい。 The opening shape of the opening window 28 is not limited to a substantially square shape, and may be, for example, a circular shape, a polygonal shape other than a square shape, a modified shape, or the like. Further, the cross-sectional shape of the stopper rubber 42 in the direction orthogonal to the protruding direction of the protruding rubber 46 is not limited to a substantially square shape, and may be, for example, a circular shape, a polygonal shape other than a square shape, or a modified shape. It is desirable that the opening shape of the opening window 28 and the cross-sectional shape in the direction orthogonal to the protruding direction of the protruding rubber 46 correspond to each other, but the shapes may be different from each other.

前記実施形態では、開口窓28の貫通方向の投影において、突出ゴム46の先端部分の全体が開口窓28上に位置している例を示したが、例えば、図9に示すように、突出ゴム46の先端部分が部分的に開口窓28を外れて位置していてもよい。この場合に、開口窓28の貫通方向の投影において、突出ゴム46の先端部分における開口窓28上に位置する部分の面積A1は、充填ゴム44の面積(開口窓28の開口面積)Bよりも小さくされる。また、突出ゴム46の先端部分は、開口窓28の貫通方向の投影において、開口窓28上に位置する部分の面積A1が、全体の面積Aの1/2倍以上(A1≧A/2)であることが望ましい。これにより、側方ストッパゴム42のばね特性において、充填ゴム44及び嵌合ゴム34によって高さ寸法を大きく確保された部分の影響が大きくなって、柔らかいばね特性を実現することができる。また、突出ゴム46の先端部分が部分的に開口窓28を外れて位置する領域によって側方ストッパゴム42のストッパ剛性の向上を含むチューング範囲の拡大も可能になる。なお、図9では、突出ゴム46の先端部分における開口窓28上に位置する部分がグレーに着色されて示されている。 In the above embodiment, an example is shown in which the entire tip portion of the protruding rubber 46 is located on the opening window 28 in the projection in the penetrating direction of the opening window 28. For example, as shown in FIG. 9, the protruding rubber The tip portion of 46 may be located partially off the opening window 28. In this case, in the projection in the penetrating direction of the opening window 28, the area A1 of the portion located on the opening window 28 at the tip portion of the protruding rubber 46 is larger than the area A of the filling rubber 44 (opening area of the opening window 28) B. Be made smaller. Further, in the projection of the tip portion of the protruding rubber 46 in the penetrating direction of the opening window 28, the area A1 of the portion located on the opening window 28 is ½ or more of the total area A (A1 ≧ A / 2). Is desirable. As a result, the spring characteristics of the side stopper rubber 42 are greatly affected by the portion where the height dimension is largely secured by the filled rubber 44 and the fitting rubber 34, and the soft spring characteristics can be realized. Further, the region where the tip portion of the protruding rubber 46 is partially displaced from the opening window 28 makes it possible to expand the tuned range including the improvement of the stopper rigidity of the side stopper rubber 42. In FIG. 9, the portion of the tip of the protruding rubber 46 located on the opening window 28 is colored in gray.

突出ゴムを先細の段付き形状やテーパ形状とすることもでき、突出ゴムの先端部分におけるストッパ当接面の面積が充填ゴムの面積よりも小さくされていればよい。この場合には、充填ゴムの逃げ部の膨出変形は、突出ゴムにおけるストッパ当接面を外れてストッパ荷重の作用が小さい部分によって許容される。 The protruding rubber may have a tapered stepped shape or a tapered shape, and the area of the stopper contact surface at the tip portion of the protruding rubber may be smaller than the area of the filled rubber. In this case, the bulging deformation of the relief portion of the filled rubber is allowed by the portion of the protruding rubber that is off the stopper contact surface and the action of the stopper load is small.

また、アウタブラケット58における突出ゴム46との当接面は、必ずしも平面に限定されず、例えば、凹凸や段差、テーパ等が設定されていてもよい。ストッパ機構80における第二の取付部材14側の当接面の凹凸等によって、突出ゴム46の先端部分が当該当接面に対して当接初期に部分的に当接する場合には、突出ゴム46の先端部分において当接初期に当該当接面と当接する部分の当接面積が、充填ゴム44の面積よりも小さくされる。 Further, the contact surface of the outer bracket 58 with the protruding rubber 46 is not necessarily limited to a flat surface, and for example, unevenness, a step, a taper, or the like may be set. When the tip portion of the protruding rubber 46 partially abuts on the contact surface at the initial stage of contact due to the unevenness of the contact surface on the second mounting member 14 side of the stopper mechanism 80, the protruding rubber 46 The contact area of the portion of the tip of the rubber that comes into contact with the contact surface at the initial stage of contact is made smaller than the area of the filled rubber 44.

なお、前記実施形態において凹溝48として示すように、突出ゴム46の先端部分に設けられる緩衝や打音低減などの初期当たり特性改善のための凹凸に関して、当該凹凸の有無が突出先端部分の面積に影響しない。また、同様に、突出ゴム46の基端部分の拡幅の有無も、突出ゴム46の突出先端部分の面積に影響しない。突出ゴム46の突出先端部分の面積は、実質的にストッパ機能を発揮し始める際の第二の取付部材(アウタブラケット58)への当接状態となる領域の面積(当該領域を変形前の形状に換算した面積)であり、具体的には、例えばストッパゴム42のばね特性の線形領域における第二の取付部材への当接領域の面積として把握することができる。また、例えばストッパゴム42において予定乃至は想定されているストッパ入力荷重の1/5の荷重入力時における第二の取付部材への当接領域の面積として、或いは、ストッパゴム42において許容される最大変形量の1/5の変形状態における第二の取付部材への当接領域の面積として、具体的に把握することも可能である。 As shown as the concave groove 48 in the above embodiment, regarding the unevenness for improving the initial hitting characteristics such as buffering and reducing the tapping sound provided at the tip portion of the protruding rubber 46, the presence or absence of the unevenness indicates the area of the protruding tip portion. Does not affect. Similarly, the presence or absence of widening of the base end portion of the protruding rubber 46 does not affect the area of the protruding tip portion of the protruding rubber 46. The area of the protruding tip portion of the protruding rubber 46 is the area of the region that is in contact with the second mounting member (outer bracket 58) when the stopper function is substantially started (the shape of the region before deformation). (Area converted to), and specifically, for example, it can be grasped as the area of the contact area with the second mounting member in the linear region of the spring characteristic of the stopper rubber 42. Further, for example, as the area of the contact area with the second mounting member at the time of inputting a load of 1/5 of the planned or assumed stopper input load in the stopper rubber 42, or the maximum allowable in the stopper rubber 42. It is also possible to specifically grasp the area of the contact area with the second mounting member in the deformed state of 1/5 of the deformation amount.

また、突出ゴム46の外周面は、オーバーハングやアンダーカット形状を有していないことが望ましい。好適には、抜きテーパを考慮して、突出ゴム46の外周面には、突出方向に向かって僅かに断面が小さくなるような傾斜が付されることが好ましい。これにより、突出ゴム46の断面積は、突出先端部分の面積と同一か大きくされることが好適である。 Further, it is desirable that the outer peripheral surface of the protruding rubber 46 does not have an overhang or an undercut shape. Preferably, in consideration of the punching taper, it is preferable that the outer peripheral surface of the protruding rubber 46 is inclined so that the cross section becomes slightly smaller in the protruding direction. Thereby, it is preferable that the cross-sectional area of the protruding rubber 46 is the same as or larger than the area of the protruding tip portion.

また、突出ゴム46の先端部分の面積よりも大きくされた充填ゴム44の面積は、突出ゴム46に対するストッパ荷重の入力方向(又は開口窓28の貫通方向或いは突出ゴム46の突出方向)において、突出ゴム46の先端部分の外周上に位置する領域によって確保されることが望ましい。具体的には、例えば前記第一の実施形態のように、突出ゴム46の突出方向での投影において、突出ゴム46の先端部分の全周囲において充填ゴム44(又は開口窓28)が一回り大きくされることによって、或いは、例えば前記別の実施形態のように、突出ゴム46の突出方向での投影において、突出ゴム46の先端部分の周囲で部分的に充填ゴム44(又は開口窓28)が突出ゴム46の先端部分よりも外周側へ拡幅状に大きくされることによって実現され得る。 Further, the area of the filled rubber 44 larger than the area of the tip portion of the protruding rubber 46 protrudes in the input direction of the stopper load to the protruding rubber 46 (or the penetrating direction of the opening window 28 or the protruding direction of the protruding rubber 46). It is desirable to be secured by a region located on the outer periphery of the tip portion of the rubber 46. Specifically, for example, as in the first embodiment, in the projection of the protruding rubber 46 in the protruding direction, the filled rubber 44 (or the opening window 28) is slightly larger around the entire tip portion of the protruding rubber 46. The filled rubber 44 (or the opening window 28) is partially around the tip portion of the protruding rubber 46, or by projection in the protruding direction of the protruding rubber 46, for example as in another embodiment. This can be realized by widening the protruding rubber 46 toward the outer peripheral side of the tip portion.

前記実施形態では、筒状部18の側壁部20に1つの開口窓28のみが設けられた例を示したが、例えば、側壁部20に2つ以上の開口窓28を形成してもよい。これによれば、筒状部18の変形剛性を確保しながら、開口窓28の開口面積の総和を大きく得ることができる。 In the above embodiment, an example in which only one opening window 28 is provided on the side wall portion 20 of the tubular portion 18, but for example, two or more opening windows 28 may be formed on the side wall portion 20. According to this, it is possible to obtain a large total opening area of the opening window 28 while ensuring the deformation rigidity of the tubular portion 18.

第一の取付部材12の筒状部18は、四角筒状に限定されず、例えば、円筒状、四角筒以外の多角筒状、異形筒状などであってもよい。また、筒状部18の内周面に固着される嵌合ゴム34はなくてもよく、インナブラケット56が筒状部18に直接的に圧入されて固定され得る。その場合に、ストッパゴム42は、突出ゴム46と充填ゴム44によって構成される。 The tubular portion 18 of the first mounting member 12 is not limited to a square cylinder, and may be, for example, a cylinder, a polygonal cylinder other than a square cylinder, a deformed cylinder, or the like. Further, the fitting rubber 34 fixed to the inner peripheral surface of the tubular portion 18 may not be provided, and the inner bracket 56 may be directly press-fitted into the tubular portion 18 to be fixed. In that case, the stopper rubber 42 is composed of the protruding rubber 46 and the filling rubber 44.

前記実施形態では、内部の流体室や能動的な制振装置等を持たないソリッドタイプの防振装置を例示したが、例えば、内部に非圧縮性流体が封入された流体室を備える流体封入式防振装置や、加振器などの能動的な制振装置を備える能動型の流体封入式防振装置などにも、本発明は適用可能である。 In the above embodiment, a solid type anti-vibration device having no internal fluid chamber, active anti-vibration device, or the like has been exemplified. The present invention can also be applied to a vibration isolator, an active fluid-filled vibration isolator provided with an active vibration damping device such as a vibration isolator, and the like.

10 エンジンマウント(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
18 筒状部
20 側壁部
22 上壁部
24 下壁部
26 固着部
28 開口窓
30 内フランジ状部
32 凹所
34 嵌合ゴム
36 ブラケット装着孔
38 上方ストッパゴム
40 凹溝
42 側方ストッパゴム(ストッパゴム)
44 充填ゴム
46 突出ゴム
48 凹溝
50 受圧部
52 逃げ部
54 被覆ゴム
56 インナブラケット
58 アウタブラケット
60 嵌合部
62 取付部
64 ボルト穴
66 筒状装着部
68 門形部
70 側方脚部
72 上方連結部
74 取付片
76 ボルト穴
77 補強リブ
78 上部ストッパ機構
80 側部ストッパ機構(ストッパ機構)
10 Engine mount (vibration isolation device)
12 First mounting member 14 Second mounting member 16 Main body rubber elastic body 18 Cylindrical part 20 Side wall part 22 Upper wall part 24 Lower wall part 26 Fixed part 28 Opening window 30 Inner flange-shaped part 32 Recessed part 34 Fitting rubber 36 Bracket mounting hole 38 Upper stopper rubber 40 Recessed groove 42 Side stopper rubber (stopper rubber)
44 Filling rubber 46 Protruding rubber 48 Concave groove 50 Pressure receiving part 52 Relief part 54 Covered rubber 56 Inner bracket 58 Outer bracket 60 Fitting part 62 Mounting part 64 Bolt hole 66 Cylindrical mounting part 68 Gate shape part 70 Side leg part 72 Upper Connecting part 74 Mounting piece 76 Bolt hole 77 Reinforcing rib 78 Upper stopper mechanism 80 Side stopper mechanism (stopper mechanism)

Claims (6)

インナブラケットが挿入固定される筒状部を備えた第一の取付部材が第二の取付部材に対して本体ゴム弾性体によって連結されており、
該第一の取付部材と該第二の取付部材側との該筒状部に固着されたストッパゴムを介した当接によって該第一の取付部材と該第二の取付部材の相対変位量を制限するストッパ機構が構成される防振装置であって、
前記第一の取付部材の前記筒状部には周壁を貫通する開口窓が形成され、
該開口窓の内周面に固着されて該開口窓を塞ぐ充填ゴムが設けられていると共に、該充填ゴムから該筒状部の外周へ向けて突出する突出ゴムが設けられて、それら充填ゴムと突出ゴムを含んで前記ストッパゴムが構成されており、
該開口窓の貫通方向の投影において該開口窓上に位置する該突出ゴムの先端部分の面積が該充填ゴムの面積よりも小さくされている防振装置。
The first mounting member having a cylindrical portion into which the inner bracket is inserted and fixed is connected to the second mounting member by a rubber elastic body of the main body.
The relative displacement amount between the first mounting member and the second mounting member is determined by the contact between the first mounting member and the second mounting member side via the stopper rubber fixed to the tubular portion. It is a vibration isolation device that has a stopper mechanism to limit it.
An opening window penetrating the peripheral wall is formed in the cylindrical portion of the first mounting member.
A filling rubber that is fixed to the inner peripheral surface of the opening window and closes the opening window is provided, and a protruding rubber that protrudes from the filling rubber toward the outer periphery of the tubular portion is provided, and the filling rubber is provided. The stopper rubber is configured to include the protruding rubber and the protruding rubber.
A vibration isolator in which the area of the tip portion of the protruding rubber located on the opening window is made smaller than the area of the filled rubber in the projection in the penetrating direction of the opening window.
前記筒状部の軸方向において前記開口窓の長さ寸法が該筒状部の長さ寸法の1/3倍以上且つ4/5倍以下とされている請求項1に記載の防振装置。 The vibration isolator according to claim 1, wherein the length dimension of the opening window in the axial direction of the tubular portion is 1/3 times or more and 4/5 times or less the length dimension of the tubular portion. 前記筒状部が矩形筒状とされて、前記開口窓が該筒状部の側壁部に設けられており、該筒状部の周方向において該開口窓の幅寸法が該側壁部の幅寸法の1/2倍以上とされている請求項2に記載の防振装置。 The tubular portion has a rectangular tubular shape, the opening window is provided on the side wall portion of the tubular portion, and the width dimension of the opening window in the circumferential direction of the tubular portion is the width dimension of the side wall portion. The anti-vibration device according to claim 2, which is more than 1/2 times the size of the vibration isolator. 前記開口窓の開口形状が略四角形とされている請求項1~3の何れか一項に記載の防振装置。 The anti-vibration device according to any one of claims 1 to 3, wherein the opening shape of the opening window is substantially quadrangular. 前記開口窓の貫通方向の投影において該開口窓上に位置する前記突出ゴムの先端部分の面積が該突出ゴムの先端部分全体の面積に対して1/2倍以上とされている請求項1~4の何れか一項に記載の防振装置。 Claims 1 to 1 in which the area of the tip portion of the protruding rubber located on the opening window is 1/2 times or more the area of the entire tip portion of the protruding rubber in the projection in the penetrating direction of the opening window. The anti-vibration device according to any one of 4. 前記筒状部の内周面を覆う嵌合ゴムが設けられており、
該嵌合ゴムが前記充填ゴムと一体的に設けられて前記ストッパゴムを構成している請求項1~5の何れか一項に記載の防振装置。
A fitting rubber that covers the inner peripheral surface of the tubular portion is provided.
The vibration isolator according to any one of claims 1 to 5, wherein the fitting rubber is provided integrally with the filling rubber to form the stopper rubber.
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