JP6552153B2 - Vibration control device - Google Patents

Vibration control device Download PDF

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JP6552153B2
JP6552153B2 JP2014014464A JP2014014464A JP6552153B2 JP 6552153 B2 JP6552153 B2 JP 6552153B2 JP 2014014464 A JP2014014464 A JP 2014014464A JP 2014014464 A JP2014014464 A JP 2014014464A JP 6552153 B2 JP6552153 B2 JP 6552153B2
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stopper
outer cylinder
vibration
annular
stopper member
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JP2015140875A (en
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夕花 松井
夕花 松井
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Bridgestone Corp
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  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
  • Combined Devices Of Dampers And Springs (AREA)

Description

本発明は、防振装置に関するものである。   The present invention relates to an antivibration device.

防振装置には、例えば、過大な荷重が入力された時に生じる弾性体の過大な変形を防止することを目的に、アウタブラケットの車両上側に間隔を置いて、バウンドストッパゴムなどのストッパ部材を配置したものがある（例えば、特許文献１参照）。特許文献１に記載のストッパ部材は、有底円筒形状であって、当該ストッパ部材の周壁がアウタブラケットの小径筒部を取り囲むことによって異物の侵入などを防止することもできる。   For example, in order to prevent excessive deformation of the elastic body that occurs when an excessive load is input, the vibration isolator is provided with a stopper member such as a bound stopper rubber with an interval on the vehicle upper side of the outer bracket. There is an arrangement (see, for example, Patent Document 1). The stopper member described in Patent Document 1 has a bottomed cylindrical shape, and the peripheral wall of the stopper member surrounds the small-diameter cylindrical portion of the outer bracket, thereby preventing entry of foreign matter.

特開２００７−５１７６９号公報JP 2007-51769 A

しかしながら、それと同時に上記の従来のストッパ部材は、アウタブラケットの小径筒部周りに周壁を配置するためのスペースが必要となる。このため、ストッパ部材が他の部品と干渉しないように防振装置の配置スペースを考慮する必要がある。   However, at the same time, the above-mentioned conventional stopper member requires a space for arranging the peripheral wall around the small diameter cylindrical portion of the outer bracket. For this reason, it is necessary to consider the arrangement space of the vibration control device so that the stopper member does not interfere with other parts.

また、上記の従来の防振装置は、水平方向（車両前後左右方向）の入力があると、ストッパ部材の周壁がアウタブラケットの小径筒部に対して局所的に当接するため、ストッパ部材の耐久性に改善の余地がある。   In the above-described conventional vibration damping device, when there is an input in the horizontal direction (the longitudinal direction of the vehicle), the peripheral wall of the stopper member abuts locally on the small diameter cylindrical portion of the outer bracket. There is room for improvement in gender.

さらに、防振装置に対して水平方向の入力と垂直方向（車両上下方向）の入力とが同時にあったときも、ストッパ部材の周壁がアウタブラケットの小径筒部に対して局所的に当接する。このため、入力が垂直方向からのみで、ストッパ部材がアウタブラケットの小径筒部に当接しない場合と、入力が垂直方向と水平方向との両方からでストッパ部材がアウタブラケットの小径筒部に局所的に当接する場合とでは、ストッパ当たり後の特性（入力によりストッパ部材がアウタブラケットに当接した後の特性。例えば、変位−荷重で規定された特性）に変化が生じてしまう。このストッパ当たり後の特性は予め設定される場合があるため、振動の入力方向に関わらず不変であることが望ましい。   Furthermore, the peripheral wall of the stopper member abuts locally on the small diameter cylindrical portion of the outer bracket even when the input in the horizontal direction and the input in the vertical direction (vertical direction of the vehicle) are simultaneously performed on the vibration isolation device. Therefore, when the input is only from the vertical direction and the stopper member does not contact the small-diameter cylindrical portion of the outer bracket, and when the input is from both the vertical direction and the horizontal direction, the stopper member is locally applied to the small-diameter cylindrical portion of the outer bracket. In the case of abutment, the characteristics after contact with the stopper (characteristics after the stopper member comes into contact with the outer bracket by input, for example, characteristics defined by displacement-load) change. Since the characteristics after hitting the stopper may be set in advance, it is desirable that the characteristics remain unchanged regardless of the vibration input direction.

本発明の目的は、異物の侵入を抑制しつつ配置スペースを広く確保することができて、ストッパ当たり後の特性に変化を生じ難く、しかも耐久性に優れた、防振装置を提供することにある。   An object of the present invention is to provide a vibration isolator capable of ensuring a wide arrangement space while suppressing intrusion of foreign matter, hardly causing a change in characteristics after hitting a stopper, and having excellent durability. is there.

本発明の防振装置は、振動発生部および振動受け部の一方に連結される内側部材と、前記振動発生部および前記振動受け部の他方に連結される外筒部材と、前記内側部材と前記外筒部材とを弾性的に連結する弾性体と、前記内側部材における前記外筒部材からの突出部分が貫通する貫通孔を有して当該貫通孔に挿通させた状態で前記外筒部材と当接可能なストッパ部材とを備え、前記ストッパ部材は、当該ストッパ部材の外径寸法が、前記外筒部材の外径寸法と同一またはそれ以下であって、前記外筒部材と向い合うストッパ面が、前記貫通孔を環状に取り囲む環状内側ストッパ面と、前記環状内側ストッパ面の径方向外側で、当該環状内側ストッパ面から径方向外側に向かうに従って前記外筒部材に接近する環状外側ストッパ面とで形成されているとともに、前記外筒部材に対して軸線方向に離間したものであることを特徴とするものである。
本発明の防振装置によれば、前記ストッパ部材と前記外筒部材との間からの異物の侵入を抑制しつつ、防振装置の配置スペースを広く確保できて、ストッパ当たり後の特性に変化を生じ難く、しかも耐久性に優れたものとすることができる。 The anti-vibration device according to the present invention comprises an inner member connected to one of a vibration generating portion and a vibration receiving portion, an outer cylindrical member connected to the other of the vibration generating portion and the vibration receiving portion, the inner member and the inner member The outer cylindrical member is in contact with the outer cylindrical member in a state in which the elastic member that elastically connects the outer cylindrical member and the through hole through which the projecting portion of the inner member from the outer cylindrical member penetrates is inserted through the through hole. A stopper member that can contact the stopper member, and the stopper member has an outer diameter dimension equal to or less than an outer diameter dimension of the outer cylinder member, and a stopper surface that faces the outer cylinder member. An annular inner stopper surface that annularly surrounds the through hole, and an annular outer stopper surface that is radially outward of the annular inner stopper surface and approaches the outer cylinder member from the annular inner stopper surface toward the radially outer side. Formed Together and is characterized in that is obtained by axially spaced relative to the outer cylinder member.
According to the vibration-proofing device of the present invention, the arrangement space of the vibration-proofing device can be widely secured while suppressing the intrusion of foreign matter from between the stopper member and the outer cylindrical member, and the characteristics after the stopper contact change. Can be difficult to be generated, and moreover, can be excellent in durability.

前記ストッパ部材は、当該ストッパ部材の径方向に対して直交する方向の厚さが当該ストッパ部材の前記外筒部材と向い合うストッパ面が形成された領域において、実質上等しい厚さであることが好ましい。
この場合、ストッパ当たり後の特性の変化をさらに抑制することができる。 The thickness of the stopper member in a direction orthogonal to the radial direction of the stopper member is substantially equal in thickness in a region where the stopper surface facing the outer cylindrical member of the stopper member is formed. preferable.
In this case, it is possible to further suppress the change in characteristics after the stopper comes into contact.

前記環状外側ストッパ面は、前記ストッパ部材の径方向外側に向かうに従って湾曲する曲面で形成されたものであることが好ましい。
この場合、ストッパ当たり後の特性の変化をより一層抑制することができる。 It is preferable that the annular outer stopper surface is formed by a curved surface that curves toward the radially outer side of the stopper member.
In this case, it is possible to further suppress the change in the characteristics after the stopper contacts.

本発明によれば、異物の侵入を抑制しつつ配置スペースを広く確保することができて、ストッパ当たり後の特性に変化を生じ難く、しかも耐久性に優れた、防振装置を提供することができる。   According to the present invention, it is possible to provide a vibration isolator capable of ensuring a wide arrangement space while suppressing intrusion of foreign matter, hardly causing a change in characteristics after hitting a stopper, and having excellent durability. it can.

本発明の防振装置の一実施形態である、エンジンマウントを車両に搭載しない状態で示す縦断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view shown in the state which does not mount an engine mount which is one embodiment of the vibration-proof apparatus of this invention in a vehicle. 図１のエンジンマウントを車両に搭載してエンジンからの荷重を受けた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which mounts the engine mount of FIG. 1 in the vehicle, and receives the load from an engine.

以下、図面を参照して、本発明の防振装置の一実施形態を説明する。なお、以下の説明では、図面上側および下側をそれぞれ車両上側および下側として説明する。また本実施形態では、エンジン側部材を振動発生部とし、車台（車体）側部材を振動受け部とする。   Hereinafter, an embodiment of the vibration damping device of the present invention will be described with reference to the drawings. In the following description, the upper side and the lower side of the drawing will be described as the upper side and the lower side of the vehicle, respectively. Further, in the present embodiment, the engine side member is a vibration generating portion, and the chassis (car body) side member is a vibration receiving portion.

符号１は、本発明の防振装置の一実施形態である、エンジンマウントである。符号２は、振動発生部に連結される、例えば金属製の内側部材である。本実施形態では、内側部材２の上端に、例えば、ボルトを用いて例えば金属製のエンジン側マウントブラケットＢ1が固定されている。これにより、内側部材２はエンジン側マウントブラケットＢ1を介してエンジンに連結される。なお、本発明では、内側部材２は、本実施形態のように、一端にねじ穴が形成された円柱形等の中実形状のものに限定されない。例えば、内側部材２には、円筒形状のものも含まれる。 Reference numeral 1 denotes an engine mount which is an embodiment of the vibration isolator of the present invention. Reference numeral 2 is an inner member, for example, made of metal, connected to the vibration generating unit. In the present embodiment, the upper end of the inner member 2, for example, the engine-side mount bracket B 1 for example made of metal with a bolt is fixed. Thus, the inner member 2 is coupled to the engine via the engine side mount bracket B 1. In the present invention, as in the present embodiment, the inner member 2 is not limited to a solid shape such as a cylindrical shape having a screw hole formed at one end. For example, the inner member 2 includes a cylindrical shape.

符号３は、内側部材２の一部分２ａを突出させるように取り囲んで振動受け部に連結される、例えば金属製の外筒部材である。本実施形態では、外筒部材３は、開口部Ａが形成された環状の平坦部３ａと、この平坦部３ａの外周縁に繋がる環状の肩部３ｂと、この肩部３ｂの外周縁から車両下側に向かって等しい外径寸法で伸びる円筒状の外筒部３ｃとを有する。外筒部３ｃには、例えば、溶接等によって例えば金属製の車台側マウントブラケットＢ2が固定されている。これにより、外筒部材３は車台側マウントブラケットＢ2を介して車台等に連結される。 The code | symbol 3 is a metal outer cylinder member which is connected so that it may surround so that the part 2a of the inner member 2 may be protruded, and a vibration receiving part. In the present embodiment, the outer cylinder member 3 includes an annular flat portion 3a in which an opening A is formed, an annular shoulder portion 3b connected to the outer peripheral edge of the flat portion 3a, and an outer peripheral edge of the shoulder portion 3b. And a cylindrical outer cylinder portion 3c extending with the same outer diameter toward the lower side. For example, a metal chassis-side mount bracket B 2 is fixed to the outer cylinder portion 3 c by, for example, welding. Thus, the outer cylinder member 3 is connected to the chassis or the like via the chassis-side mounting bracket B 2.

本実施形態では、外筒部材３は、平坦部３ａに形成された振動入力側表面ｆ1が、環状の平面で構成されている。また本実施形態では、肩部３ｂの縦断面形状は、図１に示すように、外筒部材３の内側に中心を有する曲率半径の曲線となり、径方向外側に向かうに従って湾曲する曲面である。 In this embodiment, the outer cylinder member 3 was formed on the flat portion 3a vibration input side surface f 1 is formed by an annular plane. In the present embodiment, the vertical cross-sectional shape of the shoulder portion 3b is a curved surface having a radius of curvature having a center on the inner side of the outer cylindrical member 3, as shown in FIG. 1, and is a curved surface that curves toward the outer side in the radial direction.

符号４は、外筒部材３の内側に、例えば圧入等により固定される中間筒部材である。中間筒部材４は、外筒部材３とともにエンジンマウントケースを構成する。本実施形態のエンジンマウント１は、エンジンマウントケース内に液体を充填することで、防振性能を高めている。   Reference numeral 4 denotes an intermediate cylindrical member fixed inside the outer cylindrical member 3 by, for example, press fitting. The intermediate cylinder member 4 and the outer cylinder member 3 constitute an engine mount case. In the engine mount 1 of the present embodiment, the vibration proof performance is enhanced by filling the engine mount case with a liquid.

符号５は、内側部材２と外筒部材３との間に配置されて内側部材２と外筒部材３とを弾性的に連結する、例えばゴム製の弾性体である。本実施形態では、内側部材２の軸線は、外筒部材３の軸線Ｏと同一軸線となるように構成されている。図１に示すように、弾性体５は、外筒部材３の平坦部３ａの裏面に離間可能に当接しているとともに、中間筒部材４を介して外筒部材３の外筒部３ｃの内周面に弾性的に連結されている。   Reference numeral 5 is an elastic body made of rubber, for example, which is disposed between the inner member 2 and the outer cylinder member 3 and elastically connects the inner member 2 and the outer cylinder member 3. In the present embodiment, the axis of the inner member 2 is configured to be the same axis as the axis O of the outer cylinder member 3. As shown in FIG. 1, the elastic body 5 is in contact with the back surface of the flat portion 3 a of the outer cylinder member 3 so as to be separable, and the inner side of the outer cylinder portion 3 c of the outer cylinder member 3 via the intermediate cylinder member 4. It is elastically connected to the circumferential surface.

なお、本実施形態では、中間筒部材４には開口部が形成されており、この開口部が弾性体からなる隔壁６によって閉じられている。また中間筒部材４には、エンジンマウントケースの内部空間を外筒部材３側の主液室Ｓ1と隔壁６側の副液室Ｓ2とに仕切る仕切り壁７が設けられている。仕切り壁７には、低周波振動を減衰させるために主液室Ｓ1および副液室Ｓ2を連通させる環状の制限通路９が形成されているとともに、高周波振動入力時の動ばね定数の上昇を抑制するために隔壁６に繋がる可動板１０が配置されている。 In the present embodiment, an opening is formed in the intermediate cylindrical member 4 and the opening is closed by a partition 6 made of an elastic material. Also the intermediate tubular member 4, the partition walls 7 which partitions the inner space of the engine mount case and the secondary liquid chamber S 2 of the outer tube member 3 side main fluid chamber S 1 and the partition 6 side. The partition wall 7, with annular restricted passage 9 which communicates the main liquid chamber S 1 and the auxiliary liquid chamber S 2 in order to attenuate low-frequency vibrations is formed, increase in the dynamic spring constant at the time of high-frequency vibrations input In order to suppress this, a movable plate 10 connected to the partition wall 6 is disposed.

符号８は、内側部材２の一部分（突出部分）２ａが貫通する貫通孔８ａを有して外筒部材３と当接可能なストッパ部材である。本実施形態では、ストッパ部材８は内側部材２に圧入され、回転方向及び上下方向に移動可能となっている。なお、ここで、回転方向とは、内側部材２の軸線（本実施形態では、軸線Ｏと同軸）周りの方向を意味する。   The code | symbol 8 is a stopper member which has the through-hole 8a which one part (protrusion part) 2a of the inner member 2 penetrates, and can contact | abut with the outer cylinder member 3. As shown in FIG. In the present embodiment, the stopper member 8 is press-fitted into the inner member 2 and is movable in the rotational direction and the vertical direction. Here, the rotation direction means a direction around the axis of the inner member 2 (in the present embodiment, coaxial with the axis O).

本実施形態では、ストッパ部材８は、その外径寸法が外筒部材３の外径寸法と同一である。即ち、ストッパ部材８は、このストッパ部材８の最外周面が外筒部材３の最外周面と径方向において一致するように規定されている。より具体的には、本実施形態では、ストッパ部材８の外周面８ｂで規定された外径寸法と、外筒部材３の外筒部３ｃの外周面で規定された外径寸法とは同一の外径寸法Ｌである。これにより、エンジンマウント１を車台等に搭載するときに、ストッパ部材８が外筒部材３周りの他の部品と干渉しないようにエンジンマウント１の配置スペースを考慮する必要性が軽減される。   In the present embodiment, the outer diameter dimension of the stopper member 8 is the same as the outer diameter dimension of the outer cylindrical member 3. That is, the stopper member 8 is defined such that the outermost peripheral surface of the stopper member 8 coincides with the outermost peripheral surface of the outer cylindrical member 3 in the radial direction. More specifically, in the present embodiment, the outer diameter dimension defined by the outer peripheral surface 8b of the stopper member 8 and the outer diameter dimension defined by the outer peripheral surface of the outer cylindrical portion 3c of the outer cylindrical member 3 are the same. It is the outside diameter size L. Thereby, when mounting the engine mount 1 on a chassis or the like, the necessity of considering the arrangement space of the engine mount 1 is reduced so that the stopper member 8 does not interfere with other parts around the outer cylinder member 3.

さらに、ストッパ部材８は、外筒部材３と向い合うストッパ面Ｆが、貫通孔８ａからこの貫通孔８ａを環状に取り囲む平坦な環状内側ストッパ面Ｆ1と、この環状内側ストッパ面Ｆ1の径方向外側で、この環状内側ストッパ面Ｆ1からストッパ部材８の径方向外側に向かうに従って外筒部材３に接近する環状外側ストッパ面Ｆ2とで形成されている。環状外側ストッパ面Ｆ2の外縁は、ストッパ部材８のストッパ面側の外縁（以下、「ストッパ部材８のストッパ面側外縁」という）８ｅを構成する。このように、ストッパ部材８のストッパ面側外縁８ｅを外筒部材３に接近させれば、環状内側ストッパ面Ｆ1と外筒部材３の平坦部３ａに形成された振動入力側表面ｆ1との間隔を十分に確保しつつ、ストッパ部材８のストッパ面側外縁８ｅと外筒部材３の平坦部３ａに形成された振動入力側表面ｆ1との間における、軸線Ｏ方向の間隔を狭めることができる。 Further, the stopper member 8 includes a flat annular inner stopper surface F 1 in which a stopper surface F facing the outer cylinder member 3 annularly surrounds the through hole 8a from the through hole 8a, and a diameter of the annular inner stopper surface F 1 . in outward, it is formed in the annular outer stopper surface F 2 of approaching the outer cylinder member 3 toward the annular inner stop face F 1 radially outward of the stopper member 8. The outer edge of the annular outer stopper surface F 2 is the outer edge of the stopper surface of the stopper member 8 (hereinafter, referred to as "stop surface outer edge of the stopper member 8 ') constituting the 8e. Thus, if the stopper surface side outer edge 8e of the stopper member 8 is brought close to the outer cylinder member 3, the vibration input side surface f 1 formed on the annular inner stopper surface F 1 and the flat portion 3a of the outer cylinder member 3 and while the spacing is sufficiently secured, between the vibration input side surfaces f 1 formed on the flat portion 3a of the stop surface side edge 8e and the outer cylinder member 3 of the stopper member 8, to narrow the distance between the axis O direction Can.

加えて、本実施形態では、ストッパ部材８は、外筒部材３に対してその軸線Ｏ方向に離間している。即ち、ストッパ部材８は、軸線Ｏ方向のいずれの位置でも、外筒部材３に対してオーバーラップしていない。より具体的には、ストッパ部材８のストッパ面側外縁８ｅは、図２に示すように、車両にエンジンマウント１を搭載してエンジンマウント１が車台等に対してエンジンを支持した状態においても、軸線Ｏ方向で、外筒部材３の平坦部３ａに形成された振動入力側表面ｆ1との間に、狭い隙間Ｃ1を形成している。 In addition, in this embodiment, the stopper member 8 is separated from the outer cylinder member 3 in the direction of the axis O. That is, the stopper member 8 does not overlap the outer cylinder member 3 at any position in the axis O direction. More specifically, as shown in FIG. 2, even when the engine mount 1 is mounted on a vehicle and the engine mount 1 supports the engine with respect to a chassis or the like, as shown in FIG. in the axial O direction, between the vibration input side surfaces f 1 formed on the flat portion 3a of the outer cylinder member 3 to form a narrow gap C 1.

ここで、本発明では、ストッパ部材８の環状外側ストッパ面Ｆ2が径方向外側に向かうに従って外筒部材３に接近する形状とされているので、ストッパ部材８の環状内側ストッパ面Ｆ1と外筒部材３の振動入力側表面ｆ1との間に形成される、軸線Ｏ方向の隙間Ｃ2を確保しつつ、外筒部材３の平坦部３ａに形成された振動入力側表面ｆ1とストッパ部材８のストッパ面側外縁８ｅとの間に形成される軸線Ｏ方向の隙間Ｃ1を狭めることができる。これにより、ストッパ部材８の外径寸法を外筒部材３の外径寸法と同一又はそれ以下とし、また、外筒部材３とストッパ部材８との間を、軸線Ｏ方向に離間させても、異物が隙間Ｃ1から侵入することを抑制できる。また、エンジン側からの過大な振動が内側部材２に入力されたとき等の場合も、従来と同様、ストッパ部材８のストッパ面Ｆは、少なくとも外筒部材３の振動入力側表面ｆ1に当接することによりストッパ機能を発揮させることができる。 In the present invention, because it is shaped to approach the outer cylinder member 3 according annular outer stopper surface F 2 of the stopper member 8 is directed radially outwardly, annular inner stop face F 1 and the outside of the stopper member 8 is formed between the vibration input side surfaces f 1 of the cylindrical member 3, while ensuring the axial line O direction of the gap C 2, the vibration input side surfaces f 1 formed on the flat portion 3a of the outer cylinder member 3 and the stopper it can be narrowed axis O direction of the clearance C 1 which is formed between the stopper surface side edge 8e of the member 8. Thereby, the outer diameter dimension of the stopper member 8 is equal to or smaller than the outer diameter dimension of the outer cylinder member 3, and the outer cylinder member 3 and the stopper member 8 are separated in the direction of the axis O, foreign matter can be prevented from entering from the clearance C 1. Also, even when excessive vibration from the engine side is input to the inner member 2, etc., the stopper surface F of the stopper member 8 is at least in contact with the vibration input side surface f 1 of the outer cylindrical member 3 as in the conventional case. By contacting, the stopper function can be exhibited.

なお、隙間Ｃ1の大きさ（間隔）は、適宜設定することができるが、異物の侵入を十分抑制し、かつ、ストッパ機能を十分発揮させるために、例えば、１〜２mmとすることが好ましく、具体的には、例えば、１．５mmである。 The size (interval) of the gap C 1 can be set as appropriate, but is preferably set to, for example, 1 to 2 mm in order to sufficiently suppress the intrusion of foreign matter and to sufficiently exhibit the stopper function. Specifically, for example, it is 1.5 mm.

また、従来の有底筒状のストッパ部材には、外筒部材３の外筒部３ｃを取り囲む周壁が存在するため、水平方向（車両前後左右方向）の入力があると、ストッパ部材の周壁が外筒部３ｃに対して局所的に当接するため、ストッパ部材の耐久性に改善の余地があったが、本実施形態のエンジンマウント１は、図２等に示すように、外筒部材３の外筒部３ｃを取り囲む周壁が存在しないため、どの方向に入力があってもストッパ部材８が外筒部材３の外筒部３ｃに対して局所的に当接することがなく、ストッパ部材の耐久性が向上する。   In addition, since the conventional bottomed cylindrical stopper member has a peripheral wall that surrounds the outer cylindrical portion 3c of the outer cylindrical member 3, if there is an input in the horizontal direction (vehicle front-rear left-right direction), the peripheral wall of the stopper member Since there is room for improvement in the durability of the stopper member because it abuts locally with respect to the outer cylinder portion 3c, the engine mount 1 of the present embodiment, as shown in FIG. Since there is no peripheral wall surrounding the outer cylindrical portion 3c, the stopper member 8 does not locally contact the outer cylindrical portion 3c of the outer cylindrical member 3 regardless of the direction of input, and the durability of the stopper member Improve.

さらに、従来のストッパ部材を有するエンジンマウントでは、垂直方向（車両上下方向）の入力と水平方向の入力とが同時にあったとき、入力が垂直方向からのみの場合と、入力が垂直方向と水平方向との両方からの場合とでは、ストッパ当たり後の特性（入力によりストッパ部材がアウタブラケットに当接した後の特性。例えば、変位−荷重で規定された特性）に変化が生じてしまうが、本実施形態のエンジンマウント１では、図２等に示すように、ストッパ部材８に外筒部材３の外筒部３ｃと当接する周壁等が存在しないため、入力が垂直方向だけの場合と、入力が垂直方向および水平方向の両方からの場合とで、ストッパ当たり後の特性に大きな変化を生じることがない。このため、本実施形態のエンジンマウント１は、ストッパ当たり後の特性を予め設定しておく場合に有効である。   Further, in the engine mount having the conventional stopper member, when the input in the vertical direction (vehicle up-down direction) and the input in the horizontal direction are simultaneous, the input is only from the vertical direction, and the input is in the vertical direction and the horizontal direction. In both cases, the characteristics after contact with the stopper (characteristics after the stopper member abuts the outer bracket by the input. For example, displacement-characteristics specified by load) may change, but In the engine mount 1 of the embodiment, as shown in FIG. 2 and the like, the stopper member 8 does not have a peripheral wall or the like that comes into contact with the outer cylinder portion 3c of the outer cylinder member 3, so that the input is only in the vertical direction. In the case of both vertical and horizontal directions, there is no significant change in the characteristics per stopper. For this reason, the engine mount 1 of the present embodiment is effective when the characteristics after contact with the stopper are set in advance.

上述のとおり、本実施形態のエンジンマウント１は、異物の侵入を抑制しつつ配置スペースを広く確保することができて、ストッパ当たり後の特性に変化を生じ難く、しかも耐久性に優れる。   As described above, the engine mount 1 of the present embodiment can secure a wide arrangement space while suppressing the intrusion of foreign matter, hardly changes in the characteristics after hitting the stopper, and is excellent in durability.

特に、本実施形態に係るストッパ部材８は、図２等に示すように、このストッパ部材８の径方向に対して直交する方向（本実施形態では、軸線Ｏ方向と同一方向）の厚さＤが少なくとも、外筒部材３と向かい合うストッパ面Ｆが形成された領域において、径方向全体に亘って実質上等しい厚さに規定されている。ここで、「外筒部材３と向かい合うストッパ面Ｆが形成された領域」とは、例えば、ストッパ面Ｆの領域のうち、外筒部材３の開口部Ａと向かい合う領域を除いた領域、即ち、ストッパ部材８が外筒部材３と接触可能な領域を意味する。また、「実質上等しい厚さ」とは、１０％程度の厚さの不均一がある場合を含むことを意味する。この場合、ストッパ部材８のストッパ面Ｆが外筒部材３の振動入力側表面ｆ1に対してどの領域で当接しても、ストッパ部材８は外筒部材３に対して均一な厚みで当接することから、ストッパ当たり後の特性の変化をさらに抑制することができる。 In particular, as shown in FIG. 2 etc., the stopper member 8 according to the present embodiment has a thickness D in a direction (in the present embodiment, the same direction as the axis O) orthogonal to the radial direction of the stopper member 8 In the region where at least the stopper surface F facing the outer cylindrical member 3 is formed, the thickness is defined to be substantially equal throughout the radial direction. Here, the “region in which the stopper surface F facing the outer cylinder member 3 is formed” means, for example, a region excluding a region facing the opening A of the outer cylinder member 3 in the region of the stopper surface F, that is, This means a region where the stopper member 8 can contact the outer cylinder member 3. Further, “substantially equal thickness” means that there is a case where there is a thickness non-uniformity of about 10%. In this case, even if the stopper surface F of the stopper member 8 abuts against the vibration input side surface f 1 of the outer cylinder member 3 in any area, the stopper member 8 abuts the outer cylinder member 3 with a uniform thickness. Thus, it is possible to further suppress the change in characteristics after the stopper comes into contact.

さらに、本実施形態では、図２に示すように、環状外側ストッパ面Ｆ2は、縦断面形状がストッパ面Ｆ側に中心を有する曲率半径ｒの円弧等の曲線となり、径方向外側に向かうに従って湾曲する曲面である。この場合、ストッパ部材８が外筒部材３に当接したとき、環状外側ストッパ面Ｆ2の部分は片当たりすることなく柔軟に変形することから、ストッパ当たり後の特性の変化をより一層抑制することができる。なお、環状外側ストッパ面Ｆ2の形状は、上述のような曲面であることが好ましいが、曲面に限定されるものではない。例えば、環状外側ストッパ面Ｆ2は、縦断面形状が直線となる、平坦な傾斜面とすることもできる。 Furthermore, in this embodiment, as shown in FIG. 2, the annular outer stopper surface F 2 is a curved line such as an arc having a radius of curvature r whose longitudinal cross-sectional shape is centered on the stopper surface F side, and as it goes outward in the radial direction. It is a curved curved surface. In this case, when the stopper member 8 abuts on the outer cylindrical member 3, the portion of the annular outer stopper surface F 2 is flexibly deformed without coming into contact with one another, thereby further suppressing the change in characteristics after the stopper comes into contact be able to. The shape of the annular outer stopper surface F 2 is preferably a curved surface as described above, is not limited to a curved surface. For example, the annular outer stopper surface F 2 may be a flat inclined surface having a vertical cross-sectional shape that is a straight line.

また、本発明では、ストッパ部材８の外径寸法は外筒部材３の外径寸法以下とすることもできる。ただし、ストッパ部材８のストッパ面Ｆが外筒部材３に当接するときのストッパ当たり後の特性を十分に発揮させるためには、本実施形態のように、ストッパ部材８の外径寸法を外筒部材３の外筒部３ｃの外径寸法と同一にすることで、外筒部材３の平坦部３ａとの接触面積を大きく確保することが好ましい。   In the present invention, the outer diameter of the stopper member 8 can be set to be equal to or smaller than the outer diameter of the outer cylinder member 3. However, in order to fully exhibit the characteristics after stopper contact when the stopper surface F of the stopper member 8 abuts against the outer cylinder member 3, the outer diameter of the stopper member 8 is set to the outer cylinder as in this embodiment. It is preferable to ensure a large contact area with the flat portion 3a of the outer cylindrical member 3 by making the outer diameter of the outer cylindrical portion 3c of the member 3 the same.

上述したところは、本発明の例示的な実施形態を説明したものであり、特許請求の範囲を逸脱しない範囲で様々な変更を行うことができる。例えば、本実施形態では、エンジン側を振動発生側とし、車台側を振動受け側としたが、車両に対して本実施形態と逆向きに搭載することで、車台側を振動発生部として内側部材２を連結する一方、エンジン側を振動受け部として外筒部材３を連結することもできる。また、本発明の防振装置は、エンジンマウント以外にも、例えば、自動変速機を車体に支持するために用いることができる。   The above descriptions describe exemplary embodiments of the present invention, and various modifications can be made without departing from the scope of the claims. For example, in the present embodiment, the engine side is the vibration generating side and the chassis side is the vibration receiving side, but by mounting the vehicle side in the opposite direction to the vehicle to the present embodiment, the inner member with the chassis side as the vibration generating portion While connecting the two, the outer cylinder member 3 can also be connected with the engine side as a vibration receiving portion. In addition to the engine mount, the vibration isolator of the present invention can be used, for example, to support the automatic transmission on the vehicle body.

さらに、エンジンマウント１の内部構造は勿論、防振性能を高めるための液体封入式かどうかについても、本実施形態に限定されない。   Further, not only the internal structure of the engine mount 1 but also whether it is a liquid-filled type for enhancing the vibration isolation performance is not limited to this embodiment.

本発明は、振動発生部および振動受け部の一方に連結される内側部材と、振動発生部および振動受け部の他方に連結される外筒部材とを弾性体で連結し、内側部材における外筒部材からの突出部分にストッパ部材を貫通させて外筒部材と当接可能な防振装置であれば、様々な防振装置に適用させることができる。   The present invention uses an elastic body to connect an inner member connected to one of the vibration generating portion and the vibration receiving portion with an outer cylinder member connected to the other of the vibration generating portion and the vibration receiving portion, and the outer cylinder in the inner member The present invention can be applied to various anti-vibration devices as long as the anti-vibration device is capable of making the stopper member penetrate through the protruding portion from the member and making contact with the outer cylinder member.

１ エンジンマウント（防振装置）
２ 内側部材
２ａ 内側部材の一部分（突出部分）
３ 外筒部材
３ａ 平坦部
３ｂ 肩部
３ｃ 外筒部
４ 中間筒部材
５ 弾性体
６ 隔壁
７ 仕切り壁
８ ストッパ部材
８ａ 貫通孔
８ｂ 外周面
８ｅ ストッパ面側外縁（ストッパ面側の外縁）
Ｂ1 エンジン側マウントブラケット
Ｂ2 車台側マウントブラケット
Ｃ1，Ｃ2 隙間
Ｄ 厚さ
ｆ1 振動入力側表面
Ｆ ストッパ面
Ｆ1 環状内側ストッパ面
Ｆ2 環状外側ストッパ面
Ｌ 外径寸法
ｒ 曲率半径 1 Engine mount (anti-vibration device)
2 inner member 2a part of the inner member (protruding part)
DESCRIPTION OF SYMBOLS 3 Outer cylinder member 3a Flat part 3b Shoulder part 3c Outer cylinder part 4 Intermediate cylinder member 5 Elastic body 6 Partition 7 Partition wall 8 Stopper member 8a Through-hole 8b Outer peripheral surface 8e Stopper side outer edge (outer edge on the stopper side)
B 1 Engine side mounting bracket B 2 Chassis side mounting bracket C 1 , C 2 gap D Thickness f 1 Vibration input side surface F Stopper surface F 1 Annular inner stopper surface F 2 Annular outer stopper surface L Outer diameter r Curvature radius

Claims (3)

振動発生部および振動受け部の一方に連結される内側部材と、前記振動発生部および前記振動受け部の他方に連結される外筒部材と、前記内側部材と前記外筒部材とを弾性的に連結する弾性体と、前記内側部材における前記外筒部材からの突出部分が貫通する貫通孔を有して当該貫通孔に挿通させた状態で前記外筒部材と当接可能なストッパ部材とを備え、
前記ストッパ部材は、
当該ストッパ部材の外径寸法が、前記外筒部材の外径寸法と同一またはそれ以下であって、
前記外筒部材と向い合うストッパ面が、前記貫通孔を環状に取り囲む環状内側ストッパ面と、前記環状内側ストッパ面の径方向外側で、当該環状内側ストッパ面から径方向外側に向かうに従って前記外筒部材に接近する環状外側ストッパ面とで形成されているとともに、
前記ストッパ部材における前記環状外側ストッパ面の外縁は、前記外筒部材に対して軸線方向に離間しており、
前記軸線方向のいずれの位置でも、前記外筒部材に対してオーバーラップしていないものであることを特徴とする、防振装置。 The inner member connected to one of the vibration generating portion and the vibration receiving portion, the outer cylindrical member connected to the other of the vibration generating portion and the vibration receiving portion, and the inner member and the outer cylindrical member elastically. An elastic body to be connected, and a stopper member capable of coming into contact with the outer cylinder member in a state of having a through hole through which a projecting portion from the outer cylinder member in the inner member penetrates and is inserted through the through hole. ,
The stopper member is
The outer diameter dimension of the stopper member is equal to or less than the outer diameter dimension of the outer cylinder member,
A stopper surface facing the outer cylinder member is an annular inner stopper surface that annularly surrounds the through-hole, and a radially outer side of the annular inner stopper surface, and the outer cylinder is directed radially outward from the annular inner stopper surface. Formed with an annular outer stop surface approaching the member;
The outer edge of the annular outer stopper surface of the stopper member is spaced apart in the axial direction with respect to the outer cylinder member ,
The anti-vibration device according to any one of the present invention , wherein any position in the axial direction is not overlapped with the outer cylinder member . 請求項１において、前記ストッパ部材は、当該ストッパ部材の径方向に対して直交する方向の厚さが当該ストッパ部材の前記外筒部材と向い合うストッパ面が形成された領域において、実質上等しい厚さである、防振装置。   The stopper member according to claim 1, wherein the stopper member has substantially the same thickness in a region in which a stopper surface having a thickness in a direction orthogonal to the radial direction of the stopper member facing the outer cylindrical member of the stopper member is formed. Vibration isolation device. 請求項１又は２において、前記環状外側ストッパ面は、前記ストッパ部材の径方向外側に向かうに従って湾曲する曲面で形成されたものである、防振装置。   The anti-vibration device according to claim 1, wherein the annular outer stopper surface is formed by a curved surface that curves toward the radially outer side of the stopper member.
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