JP2008202668A - Vibration damper - Google Patents

Vibration damper Download PDF

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JP2008202668A
JP2008202668A JP2007038332A JP2007038332A JP2008202668A JP 2008202668 A JP2008202668 A JP 2008202668A JP 2007038332 A JP2007038332 A JP 2007038332A JP 2007038332 A JP2007038332 A JP 2007038332A JP 2008202668 A JP2008202668 A JP 2008202668A
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Prior art keywords
inner cylinder
elastic connecting
connecting portion
outer cylinder
cylinder
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JP2007038332A
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Japanese (ja)
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Katsumi Someya
勝己 染谷
Yoshio Hirai
義夫 平井
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Bridgestone Corp
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Bridgestone Corp
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Priority to JP2007038332A priority Critical patent/JP2008202668A/en
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  • Vibration Prevention Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To improve the durability of an elastic connecting member interposed between an inner cylinder and an outer cylinder when vibration is input to the inner cylinder in an oblique direction. <P>SOLUTION: The vibration damper includes the inner cylinder 2, the outer cylinder 3 disposed outside of the inner cylinder and the elastic connecting member 4 interposed between the inner cylinder and the outer cylinder. The elastic connecting member is made of rubber and disposed inclinedly with respect to a plane S perpendicular to the axis of the inner cylinder. When the vibration input F is applied to the inner cylinder 2 in the oblique direction, the elastic connecting member is deformed mainly in a shearing direction, thereby improving the durability. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えば自動車のエンジンの振動発生部をマウントするため等に用いられる防振装置に関する。   The present invention relates to a vibration isolator that is used, for example, to mount a vibration generating part of an automobile engine.

自動車のエンジンを、振動をある程度減衰させた状態で、車体に支持させる防振装置として、従来から各種のものが用いられている。
その一つに、内筒と、内筒の外方に配置される外筒と、それら内筒と外筒との間に介在される弾性連結部とを備え、例えば、内筒をエンジン側に固定するとともに、外筒を車体側に固定し、これによって、当該防振装置を介して、振動をある程度抑えた形で、エンジンを支持するものがある(例えば、特許文献1、特許文献2参照)。
特開2002−70925号公報 特開平11−132276号公報
2. Description of the Related Art Conventionally, various types of vibration isolators for supporting an automobile engine on a vehicle body with vibrations attenuated to some extent have been used.
One of them is provided with an inner cylinder, an outer cylinder arranged outside the inner cylinder, and an elastic connecting portion interposed between the inner cylinder and the outer cylinder. In addition to fixing, the outer cylinder is fixed to the vehicle body side, thereby supporting the engine in a form that suppresses vibration to some extent via the vibration isolator (see, for example, Patent Document 1 and Patent Document 2). ).
JP 2002-70925 A JP-A-11-132276

ところで、上述の特許文献1,2に記載された各技術にあっては、次の問題があった。
すなわち、特許文献1,2に記載された技術では、内筒と外筒とを連結する弾性連結部が、内筒の軸芯と直交する面に対して平行となるように、つまり、内筒の径方向へ真っ直ぐ延びるように配置されている。このため、例えば、内筒に対して斜め方向から振動入力が加わるとき、その入力成分の一つが弾性連結部に対して主に圧縮変形させる力として作用することとなり、このとき繰り返し行われる圧縮変形によって、弾性連結部の耐久性が悪化するという問題があった。
By the way, each technique described in Patent Documents 1 and 2 described above has the following problems.
That is, in the techniques described in Patent Documents 1 and 2, the elastic connecting portion that connects the inner cylinder and the outer cylinder is parallel to a plane orthogonal to the axis of the inner cylinder, that is, the inner cylinder. It is arrange | positioned so that it may extend straight to the radial direction of. For this reason, for example, when vibration input is applied to the inner cylinder from an oblique direction, one of its input components mainly acts as a force for compressing and deforming the elastic connecting portion. As a result, there is a problem that the durability of the elastic connecting portion deteriorates.

本発明は、前記の課題に鑑みてなされたもので、内筒に対して斜め方向から振動入力が加わる場合に、内筒と外筒との間に介在される弾性連結部の耐久性を向上させることができる防振装置を提供することを目的とする。   The present invention has been made in view of the above problems, and improves the durability of the elastic connecting portion interposed between the inner cylinder and the outer cylinder when vibration input is applied to the inner cylinder from an oblique direction. An object of the present invention is to provide a vibration isolator that can be made to operate.

本発明は、上記課題を解決するため、以下の手段を採用する。
本発明に係る防振装置は、内筒と、該内筒の外方に配置される外筒と、それら内筒と外筒との間に介在される弾性連結部と、を備える防振装置において、前記弾性連結部をゴム製とするとともに、前記弾性連結部を前記内筒の軸芯と直交する面に対し傾斜させて配置したことを特徴とする。
The present invention employs the following means in order to solve the above problems.
The vibration isolator according to the present invention includes an inner cylinder, an outer cylinder disposed outside the inner cylinder, and an elastic coupling portion interposed between the inner cylinder and the outer cylinder. The elastic connecting portion is made of rubber, and the elastic connecting portion is arranged to be inclined with respect to a plane orthogonal to the axis of the inner cylinder.

本発明によれば、弾性連結部をゴム製とし、しかも、この弾性連結部を内筒の軸芯と直交する面に対し傾斜させて配置したため、内筒に対して斜め方向から振動入力が加わる際に、この振動入力に対しゴム製の弾性連結部が主に剪断方向へ変形する。通常、この種のゴム製の弾性連結部では、座屈を生じさせるか否かの点から、圧縮方向へ変形するよりも、剪断方向へ変形する方が、強い耐力が得られる。
したがって、本発明では、斜め方向から加わる振動入力に対しゴム製の弾性連結部が主に剪断方向へ変形するため、弾性連結部の耐久性が増す。
According to the present invention, the elastic connecting portion is made of rubber, and the elastic connecting portion is disposed so as to be inclined with respect to a plane orthogonal to the axis of the inner cylinder, so that vibration input is applied to the inner cylinder from an oblique direction. At this time, the elastic connecting portion made of rubber is deformed mainly in the shearing direction with respect to the vibration input. Usually, in this type of rubber-made elastic connecting portion, a stronger yield strength can be obtained by deforming in the shearing direction than by deforming in the compressing direction in terms of whether or not buckling occurs.
Therefore, in the present invention, the elastic connecting portion made of rubber is deformed mainly in the shearing direction with respect to the vibration input applied from the oblique direction, so that the durability of the elastic connecting portion is increased.

本発明に係る防振装置は、前記弾性連結部を、前記内筒に対して斜め方向から入力する振動方向に対して略直交するように、傾斜させて配置するのが好ましい。
この場合、斜め方向から加わる振動入力に対し、ゴム製の弾性連結部が専ら剪断方向へ変形するから、同弾性連結部の耐久性がより一層増す。
In the vibration isolator according to the present invention, it is preferable that the elastic connecting portion is arranged to be inclined so as to be substantially orthogonal to a vibration direction input from an oblique direction with respect to the inner cylinder.
In this case, since the elastic connecting portion made of rubber is deformed exclusively in the shearing direction with respect to vibration input applied from an oblique direction, the durability of the elastic connecting portion is further increased.

また、本発明に係る防振装置は、前記弾性連結部の前記内筒の軸芯と直交する面に対する傾斜角度θbを、0(度)<θb<80(度)の範囲内に設定するのが好ましい。
弾性連結部の傾斜角度を0度とした場合、背景技術で説明した従来のものと同様の構成となり、「発明が解決しようとする課題」でも説明したように、内筒に対して斜め方向から加わる振動入力が加わるときに、弾性連結部が繰り返し圧縮変形させられ、結果的に弾性連結部の耐久性が悪化する不具合が生じる。
また、前記弾性連結部の傾斜角度を、80度以上に設定すると、内筒と外筒とがそれらの軸芯方向に大きくずれて配置されることとなり、当該防振装置の占有スペースが拡がり,実用上好ましくない。
この結果、本発明では、弾性連結部の傾斜角度を上述の範囲内に設定している。
In the vibration isolator according to the present invention, the inclination angle θb of the elastic connecting portion with respect to the plane orthogonal to the axis of the inner cylinder is set within a range of 0 (degrees) <θb <80 (degrees). Is preferred.
When the inclination angle of the elastic connecting portion is 0 degree, the configuration is the same as the conventional one described in the background art, and as described in "Problems to be solved by the invention" When the applied vibration input is applied, the elastic connecting portion is repeatedly compressed and deformed, resulting in a problem that durability of the elastic connecting portion is deteriorated.
Further, when the inclination angle of the elastic coupling portion is set to 80 degrees or more, the inner cylinder and the outer cylinder are arranged so as to be greatly displaced in the axial direction thereof, and the occupied space of the vibration isolator is expanded. It is not preferable for practical use.
As a result, in the present invention, the inclination angle of the elastic coupling portion is set within the above range.

本発明に係る防振装置は、前記弾性連結部に、複数のすぐり部を形成するのが好ましい。
この場合、すぐり部をどの箇所にどのような形状で設けるかによって、弾性連結部の特性を任意に設定することができる。また、損傷され易い箇所に予めすぐり部を設けることにより、その部分の柔軟性を増し、これによって、その箇所の損傷を未然に回避できる。さらに、すぐり部を設けることにより、内筒側に固定される部材と外筒側に固定される部材との間の相対変位におけるストッパ機能を発揮させることできる。
なお、すぐり部は貫通、非貫通の何れも上記効果を奏するものであるが、弾性連結部への引張り、圧縮の影響を緩和するには、すぐり部は貫通孔形状が好ましい。
In the vibration isolator according to the present invention, it is preferable that a plurality of straight portions are formed in the elastic coupling portion.
In this case, the characteristics of the elastic connecting portion can be arbitrarily set depending on the location and shape of the straight portion. In addition, by providing a straight portion at a location that is easily damaged, the flexibility of the portion is increased, so that damage to the location can be avoided in advance. Furthermore, by providing the straight portion, it is possible to exert a stopper function in relative displacement between the member fixed to the inner cylinder side and the member fixed to the outer cylinder side.
In addition, although both the penetration part and the non-penetration have the above-mentioned effects, the straight part preferably has a through-hole shape in order to reduce the influence of tension and compression on the elastic connecting part.

本発明に係る防振装置は、前記弾性連結部が、互いに分離した複数の連結脚部を有する構成とするのが好ましい。
この場合、複数の連結脚部の形状を適宜設定することによって、弾性連結部の特性をより巾広い範囲にわたり設定することができる。
In the vibration isolator according to the present invention, it is preferable that the elastic connecting portion has a plurality of connecting leg portions separated from each other.
In this case, the characteristics of the elastic connecting portion can be set over a wider range by appropriately setting the shapes of the plurality of connecting leg portions.

本発明に係る防振装置は、前記外筒を円筒形状にするのが好ましい。
この場合、外筒を形成する場合、円筒形状とするのが、最も製作し易くかつ品質管理も行い易い。このため、無理なくコストを低減できる。
In the vibration isolator according to the present invention, the outer cylinder is preferably cylindrical.
In this case, when forming the outer cylinder, the cylindrical shape is the easiest to manufacture and the quality control is also easy. For this reason, cost can be reduced without difficulty.

本発明によれば、内筒に対して斜め方向から振動入力が加わる場合に、内筒と外筒との間に介在される弾性連結部が主に剪断方向へ変形するため、弾性連結部の耐久性を増すことができる。   According to the present invention, when the vibration input is applied to the inner cylinder from an oblique direction, the elastic coupling part interposed between the inner cylinder and the outer cylinder mainly deforms in the shear direction. Durability can be increased.

以下、本発明に係る防振装置の各実施形態を図面に基づいて説明する。
<第1実施形態>
図1〜図3は本発明の第1実施形態の防振装置を示し、図1は防振装置の正面図、図2は図1のII―II線に沿う断面図、図3は図1のIII―III線に沿う断面図である。
これらの図に示すように、防振装置1は、内筒2と、内筒2の外方に配置される外筒3と、内筒2と外筒3との間に介在されてこれら内筒2と外筒3とを弾性的に連結するゴム製の弾性連結部4とを備える。内筒2と外筒3は、互いの軸芯が平行となるように、かつ内筒が外筒の上方側に若干偏って配置される。なお、この明細書において、上下方向は図1に表されるものを基準に定めるものとする。
Hereinafter, each embodiment of the vibration isolator according to the present invention will be described with reference to the drawings.
<First Embodiment>
1 to 3 show a vibration isolator according to a first embodiment of the present invention, FIG. 1 is a front view of the vibration isolator, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. It is sectional drawing which follows the III-III line.
As shown in these drawings, the vibration isolator 1 is interposed between the inner cylinder 2, the outer cylinder 3 disposed outside the inner cylinder 2, and the inner cylinder 2 and the outer cylinder 3. A rubber elastic connecting portion 4 that elastically connects the cylinder 2 and the outer cylinder 3 is provided. The inner cylinder 2 and the outer cylinder 3 are arranged so that the axis of each other is parallel and the inner cylinder is slightly biased to the upper side of the outer cylinder. In this specification, the vertical direction is determined based on the one shown in FIG.

この防振装置1は、いわゆるブッシュタイプのエンジンマウントを構成するものであって、例えば、内筒2が図示せぬステー等を介してエンジンに固定される一方、外筒3が図示せぬブラケット等を介して車体側に固定される。この場合、エンジンの振動は、弾性連結部4が適宜弾性変形することにより、減衰された形で車体に伝わる。つまり、エンジンは、当該防振装置1によって、ある程度振動を低減された形で、車体に支持されることになる。   The vibration isolator 1 constitutes a so-called bush type engine mount. For example, the inner cylinder 2 is fixed to the engine via a stay (not shown), while the outer cylinder 3 is a bracket (not shown). It is fixed to the vehicle body side through the like. In this case, the vibration of the engine is transmitted to the vehicle body in a damped form by appropriately elastically deforming the elastic connecting portion 4. That is, the engine is supported by the vehicle body with vibrations reduced to some extent by the vibration isolator 1.

内筒2は、剛性を有する材料、例えばアルミニウム合金や鋼材等により形成される。なお、アルミニウム合金は、マグネシウムやシリコンを含むものであっても良い。
外筒3は、薄くてかつ強度を有する材料、例えば、熱延鋼板等により形成される。外筒3の厚さは、内筒2の厚さよりも薄く設定される。この理由は、このタイプの外筒3は、図示せぬブラケット等の円筒支持部に嵌入されて使用されるため、円筒支持部と協働して所定の強度を発揮できるからである。外筒3は、この実施形態では、円筒形状とされているが、これに限られることなく、他の形状、例えば、外形が楕円形状であっても、あるいは多角形状であってもよい。
The inner cylinder 2 is formed of a rigid material, such as an aluminum alloy or steel material. The aluminum alloy may contain magnesium or silicon.
The outer cylinder 3 is formed of a thin and strong material, for example, a hot-rolled steel sheet. The thickness of the outer cylinder 3 is set thinner than the thickness of the inner cylinder 2. This is because the outer cylinder 3 of this type is used by being fitted into a cylindrical support portion such as a bracket (not shown), and thus can exhibit a predetermined strength in cooperation with the cylindrical support portion. In this embodiment, the outer cylinder 3 has a cylindrical shape. However, the outer cylinder 3 is not limited to this, and may have another shape, for example, an outer shape may be an elliptical shape or a polygonal shape.

弾性連結部4は、ゴム製であって、内筒2及び外筒3に対し一体的に加硫接着されている。弾性連結部4には上下に貫通型のすぐり部5,6が形成されている。
上側のすぐり部5は円弧状にくり貫かれ、下側のすぐり部6は、3角形状にくり貫かれている。上側のすぐり部5に対向する、外筒3の内周に一体成形された弾性連結部の円弧状凹部は、第1のストッパ7とされ、この第1のストッパ7に、内筒2の外周に一体成形された弾性連結部の円弧状凸部8が当接されることで、外筒3に対する内筒2の上方への所定量以上の相対移動、並びに左右方向への相対移動がそれぞれ規制される。
The elastic connecting portion 4 is made of rubber and is integrally vulcanized and bonded to the inner cylinder 2 and the outer cylinder 3. The elastic connecting portion 4 has through-type straight portions 5 and 6 formed vertically.
The upper straight portion 5 is cut in an arc shape, and the lower straight portion 6 is cut in a triangular shape. The arc-shaped recess of the elastic connecting portion integrally formed on the inner periphery of the outer cylinder 3 that faces the upper straight portion 5 serves as a first stopper 7, and the first stopper 7 has an outer periphery of the inner cylinder 2. By the contact of the arc-shaped convex portion 8 of the elastic connecting portion formed integrally with the outer cylinder 3, the relative movement of the inner cylinder 2 above the inner cylinder 2 with respect to the outer cylinder 3 and the relative movement in the left-right direction are restricted. Is done.

また、下側のすぐり部6に対向する、外筒3の内周に一体成形された弾性連結部の円弧状凸部は、第2のストッパ9とされ、この第2のストッパ9に、内筒2の外周に一体成形された弾性連結部の円弧状凹部10が当接されることで、外筒3に対する内筒2の下方への所定量以上の相対移動、並びに左右方向への相対移動がそれぞれ規制される。   Further, the arc-shaped convex portion of the elastic connecting portion integrally formed on the inner periphery of the outer cylinder 3 that faces the lower curving portion 6 is a second stopper 9, and the second stopper 9 When the arc-shaped concave portion 10 of the elastic connecting portion formed integrally with the outer periphery of the cylinder 2 is brought into contact with the outer cylinder 3, a relative movement of a predetermined amount or more below the inner cylinder 2 with respect to the outer cylinder 3 and a relative movement in the left-right direction. Are regulated.

これら上下のすぐり部5、6の間には、2個の連結脚部11,12が形成されている。これら連結脚部11,12は、図1に示すように、内筒2あるいは外筒3の端面側から見て、略90度の開き角度θaを有するにように、互いに分離した状態で、内筒2と外筒3とにそれぞれ連結されている。
図3に示すように、内筒2の軸芯を含む断面において、弾性連結部4の連結脚部11(12)は、内筒2の軸芯と直交する面Sに対し、傾斜角度θbを有するように傾斜して配置されている。
Two connecting leg portions 11 and 12 are formed between the upper and lower straight portions 5 and 6. As shown in FIG. 1, the connecting legs 11 and 12 are separated from each other so as to have an opening angle θa of about 90 degrees when viewed from the end face side of the inner cylinder 2 or the outer cylinder 3. The cylinder 2 and the outer cylinder 3 are connected to each other.
As shown in FIG. 3, in the cross section including the axis of the inner cylinder 2, the connecting leg portion 11 (12) of the elastic connecting portion 4 has an inclination angle θb with respect to the plane S perpendicular to the axis of the inner cylinder 2. It is arranged so as to be inclined.

ここで、連結脚部11(12)の前記面Sに対する傾斜角度θbは、次にようにして決定される。
すなわち連結脚部11(12)は、内筒及び外筒にそれぞれ連結されるとき、連結強度を確保するため接触面積をできるだけ広くとることができるよう、それらの内筒及び外筒の両端部に漸次拡がるように連結されている。このため、連結脚部11(12)の本来の延在方向を決定することが難しい。このため、内筒2および外筒3と連結のための広がり部分を除く目的から、図3に示すように、連結脚部11(12)を、内筒2近傍の内筒連結領域Xa、外筒3近傍の外筒連結領域Xb、それら両領域の中間部に位置する連結脚部本体領域Xcの3つに等分し、中間部の連結脚部本体領域Xcの延在方向を、連結脚部11(12)の本来の延在方向とした。
Here, the inclination angle θb of the connecting leg 11 (12) with respect to the surface S is determined as follows.
That is, the connecting legs 11 (12) are connected to both ends of the inner cylinder and the outer cylinder so that the contact area can be made as wide as possible in order to ensure the connection strength when connected to the inner cylinder and the outer cylinder. They are connected so as to gradually expand. For this reason, it is difficult to determine the original extending direction of the connecting leg 11 (12). For this reason, for the purpose of excluding a widened portion for connection with the inner cylinder 2 and the outer cylinder 3, the connecting leg portion 11 (12) is connected to the inner cylinder connecting region Xa in the vicinity of the inner cylinder 2, as shown in FIG. An outer cylinder connection region Xb near the tube 3 and a connection leg main body region Xc located in the middle part between the two regions are equally divided into three, and the extending direction of the intermediate connection leg main body region Xc is defined as a connection leg. The original extending direction of the portion 11 (12) was used.

具体的には、連結脚部11の内筒2との接合部から外筒側へ、内筒2と外筒3との間の離間距離の1/3離間した箇所の線分m(この線分は内筒2の軸芯と平行)の中央部maと、外筒3との接合部から内筒側へ前記離間距離の1/3離間した箇所の線分nの中央部naとを結ぶ線lを、中間部の連結脚部本体領域Xcの延在方向、つまり、連結脚部11(12)の本来の延在方向とした。したがって、この線lと内筒2の軸芯と直交する前記面Sとのなす角度が前記傾斜角度θbとなる。   Specifically, a line segment m of a portion separated by 1/3 of the separation distance between the inner cylinder 2 and the outer cylinder 3 from the joint portion of the connecting leg portion 11 to the inner cylinder 2 toward the outer cylinder side (this line The central portion ma of the minute is parallel to the axis of the inner cylinder 2) and the central portion na of the line segment n at a position spaced by 1/3 of the separation distance from the joint with the outer cylinder 3 to the inner cylinder side. The line l is defined as the extending direction of the connecting leg main body region Xc at the intermediate portion, that is, the original extending direction of the connecting leg 11 (12). Therefore, an angle formed by the line 1 and the surface S perpendicular to the axis of the inner cylinder 2 is the inclination angle θb.

この傾斜角度θbは、0(度)<θb<80(度)の範囲内、より好ましくは20(度)<θ<50(度)の範囲内に設定される。
0(度)<θb<80(度)の範囲内に設定するのは、連結脚部11(12)の傾斜角度を0度とした場合、従来のものと同様の構成となり、内筒に対して斜め方向から加わる振動入力が加わるときに、連結脚部11(12)が繰り返し圧縮変形させられ、結果的に連結脚部11(12)の耐久性が悪化する不具合が生じ、また、連結脚部11(12)の傾斜角度を、80度以上に設定すると、内筒2と外筒3とがそれらの軸芯方向に大きくずれて配置されることとなり、当該防振装置1の占有スペースが拡がり,実用上好ましくないからである。
また、20(度)<θb<50(度)に設定するのは、当該防振装置1の組み付け態様によって、内筒2に加わる振動入力Fの方向が決定されるが、この振動入力Fの方向に対して、連結脚部11(12)を略直交するように配置させやすいからである。
The inclination angle θb is set within a range of 0 (degrees) <θb <80 (degrees), and more preferably within a range of 20 (degrees) <θ <50 (degrees).
The range of 0 (degrees) <θb <80 (degrees) is set when the inclination angle of the connecting leg portion 11 (12) is 0 degrees, and the configuration is the same as that of the conventional one. When the vibration input applied from an oblique direction is applied, the connecting leg portion 11 (12) is repeatedly compressed and deformed, resulting in a problem that the durability of the connecting leg portion 11 (12) deteriorates. When the inclination angle of the portion 11 (12) is set to 80 degrees or more, the inner cylinder 2 and the outer cylinder 3 are arranged so as to be greatly displaced in the axial direction thereof, and the space occupied by the vibration isolator 1 is increased. This is because it spreads and is not preferable in practice.
Further, the setting of 20 (degrees) <θb <50 (degrees) determines the direction of the vibration input F applied to the inner cylinder 2 depending on how the vibration isolator 1 is assembled. This is because the connecting legs 11 (12) can be easily arranged so as to be substantially orthogonal to the direction.

なお、外筒3の一端側(図2において左端側)には、外方へ広がるように折り曲げられた外フランジ3aが形成されている。外筒3の他端側(図2において右端側)には、内方へ狭まるように折り曲げられた内フランジ3bが形成されている。このように外筒3に、外フランジ3a及び内フランジ3bがそれぞれ設けられているのは、前述したように、この外筒3は、内部に内筒2及び弾性連結部4がそれぞれ組み込まれた状態で、図示せぬブラケットの円筒支持部に挿入されるためである。すなわち、内フランジ3bは挿入の際、案内部として機能し、また、外フランジ3aは挿入完了の際、ストッパとして機能する。
なお、13は、内筒側に固定されるエンジンが、外筒側に対して所定値以上相対変位しようとするときに、該エンジンに当接してエンジンのそれ以上の変位を規制するストッパである。
An outer flange 3a that is bent so as to spread outward is formed on one end side (left end side in FIG. 2) of the outer cylinder 3. On the other end side (the right end side in FIG. 2) of the outer cylinder 3, an inner flange 3b that is bent so as to be narrowed inward is formed. As described above, the outer cylinder 3 is provided with the outer flange 3a and the inner flange 3b, as described above, in which the inner cylinder 2 and the elastic connecting portion 4 are respectively incorporated. It is because it is inserted in the cylindrical support part of the bracket which is not shown in a state. That is, the inner flange 3b functions as a guide portion during insertion, and the outer flange 3a functions as a stopper when insertion is completed.
Reference numeral 13 denotes a stopper that abuts against the engine and restricts further displacement of the engine when the engine fixed on the inner cylinder side tries to be displaced relative to the outer cylinder side by a predetermined value or more. .

次に、上記構成の防振装置の作用について説明する。
弾性連結部4の連結脚部11,12を、内筒2の軸芯と直交する面Sに対し傾斜させて配置しているので、図3に示すように、エンジン側から内筒2に斜め方向から振動入力Fが加わる際に、この振動入力に対し、連結脚部11,12は主に剪断方向へ変形することとなる。このため、連結脚部11、12には、圧縮変形に伴う座屈現象が現れにくく、結果的に弾性連結部4の耐久性が増す。
Next, the operation of the vibration isolator having the above configuration will be described.
Since the connecting leg portions 11 and 12 of the elastic connecting portion 4 are arranged so as to be inclined with respect to the plane S perpendicular to the axis of the inner cylinder 2, as shown in FIG. When the vibration input F is applied from the direction, the connecting leg portions 11 and 12 are mainly deformed in the shear direction with respect to the vibration input. For this reason, the buckling phenomenon accompanying compression deformation does not appear easily in the connection leg parts 11 and 12, and the durability of the elastic connection part 4 increases as a result.

特に、連結脚部11,12を、前記振動入力Fに対して略直交するように、その傾斜角度θbを設定して配置しておけば、同振動入力Fが加わる際に、連結脚部11,12は専ら剪断方向へ変形するから、弾性連結部4の耐久性はより一層増すこととなる。   In particular, if the connecting leg portions 11 and 12 are arranged with the inclination angle θb set so as to be substantially orthogonal to the vibration input F, the connecting leg portion 11 is applied when the vibration input F is applied. , 12 are exclusively deformed in the shearing direction, the durability of the elastic connecting portion 4 is further increased.

また、この実施形態では、弾性連結部に複数のすぐり部5、6を形成しており、このすぐり部5,6の配置並びに形状を適宜設定することで、弾性連結部4の特性を任意に設定できる。また、損傷され易い箇所にすぐり部を設けることにより、その部分の柔軟性を増し、これによって、その箇所の損傷を未然に回避できる。さらに、この実施形態のように貫通孔形状のすぐり部5,6を設けることにより、内筒側に固定されるエンジンと外筒側に固定される車体との相対変位が所定量以上になろうとするとき、それを規制するストッパ7,9を設けることができる。
<第2実施形態>
Further, in this embodiment, a plurality of straight portions 5 and 6 are formed in the elastic connecting portion, and the characteristics and characteristics of the elastic connecting portion 4 can be arbitrarily set by appropriately setting the arrangement and shape of the straight portions 5 and 6. Can be set. In addition, by providing a straight portion at a location that is easily damaged, the flexibility of the portion is increased, and thus damage at that location can be avoided in advance. Further, by providing the through holes 5 and 6 as in this embodiment, the relative displacement between the engine fixed on the inner cylinder side and the vehicle body fixed on the outer cylinder side will become a predetermined amount or more. When doing so, it is possible to provide stoppers 7 and 9 for regulating it.
Second Embodiment

図4及び図5は、本発明の第2実施形態の防振装置を示し、図4は防振装置の正面図、図5は図4のV―V線に沿う断面図である。なお、この第2実施形態において、前述した第1実施形態と同一の構成要素については同一符号を付してその説明を省略する。
この第2の実施形態の防振装置20が、前述した第1実施形態と異なるところは、弾性連結部21の構造である。
すなわち、前記第1の実施形態では、貫通孔形状のすぐり部5,6を備えているのに対し、この第2実施形態では、凹部形状のすぐり部22,23を備えている。
4 and 5 show a vibration isolator according to a second embodiment of the present invention, FIG. 4 is a front view of the vibration isolator, and FIG. 5 is a cross-sectional view taken along line VV in FIG. In the second embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.
The vibration isolator 20 of the second embodiment is different from the first embodiment described above in the structure of the elastic connecting portion 21.
That is, in the first embodiment, the through hole-shaped straight portions 5 and 6 are provided, whereas in the second embodiment, the concave-shaped straight portions 22 and 23 are provided.

弾性連結部21の左右の端面部には、それぞれ正面視リング状とされた凹部形状のすぐり部22,23が形成されている。これらすぐり部の底面22a、23aは、内筒2の軸芯と直交する面Sに対して傾斜するように、かつ、互いに平行となるように形成されている。したがって、図5に示すように、弾性連結部21は、内筒2の上側部分21及び下側部分21Bともに、内筒2の軸芯と直交する面Sに対し、傾斜角度θbを有するように傾斜して配置されている。なお、実施形態において内筒2と外筒3とは同心状に配置されている。   On the left and right end face portions of the elastic connecting portion 21, recessed portions 22 and 23 each having a ring shape when viewed from the front are formed. The bottom surfaces 22a and 23a of these straight portions are formed so as to be inclined with respect to the surface S orthogonal to the axis of the inner cylinder 2 and to be parallel to each other. Therefore, as shown in FIG. 5, the elastic connecting portion 21 has an inclination angle θb with respect to the surface S perpendicular to the axis of the inner cylinder 2 in both the upper portion 21 and the lower portion 21B of the inner cylinder 2. It is arranged at an angle. In the embodiment, the inner cylinder 2 and the outer cylinder 3 are arranged concentrically.

この実施形態においても、弾性連結部21を、内筒2の軸芯と直交する面Sに対し傾斜させて配置しているので、エンジン側から内筒2に斜め方向から振動入力Fが加わる際に、この振動入力に対し、弾性連結部21が主に剪断方向へ変形することとなり、弾性連結部21の耐久性が増す効果が得られる。   Also in this embodiment, since the elastic coupling portion 21 is disposed to be inclined with respect to the surface S orthogonal to the axis of the inner cylinder 2, when the vibration input F is applied from the engine side to the inner cylinder 2 from an oblique direction. In addition, the elastic connecting portion 21 is mainly deformed in the shearing direction with respect to the vibration input, and an effect of increasing the durability of the elastic connecting portion 21 is obtained.

なお、本発明は、前記各実施形態に限定されることなく、発明の趣旨を逸脱しない範囲において適宜設計変更可能である。
例えば、前記実施形態では、防振装置をエンジンマウントとして利用した例について説明したが、これに限られることなく、サススペンションを支持する構造にも、本発明の防振装置は使用可能である。
また、前記第1の実施形態では、弾性連結部に連結脚部11,12を2個設けた例について説明したが、これに限られることなく、連結脚部を3個以上設けもよい。また、前記各実施形態では、すぐり部を2個設けた例について説明したが、これに限られることなく、すぐり部は1個であっても、あるいは3個以上設けてもよい。
The present invention is not limited to the above-described embodiments, and can be appropriately changed in design without departing from the spirit of the invention.
For example, in the above-described embodiment, an example in which the vibration isolator is used as an engine mount has been described. However, the present invention is not limited to this, and the vibration isolator of the present invention can be used for a structure that supports a suspension. .
Moreover, although the said 1st Embodiment demonstrated the example which provided two connection leg parts 11 and 12 in the elastic connection part, it is not restricted to this, You may provide three or more connection leg parts. In each of the above-described embodiments, the example in which the two straight portions are provided has been described. However, the present invention is not limited to this, and the number of the straight portions may be one or three or more.

本発明の第1実施形態の防振装置を示す正面図である。It is a front view which shows the vibration isolator of 1st Embodiment of this invention. 図1のII―II線に沿う断面図である。It is sectional drawing which follows the II-II line | wire of FIG. 図1のIII―III線に沿う断面図である。It is sectional drawing which follows the III-III line of FIG. 本発明の第2実施形態の防振装置を示す正面図である。It is a front view which shows the vibration isolator of 2nd Embodiment of this invention. 図4のV―V線に沿う断面図である。FIG. 5 is a cross-sectional view taken along line VV in FIG. 4.

符号の説明Explanation of symbols

1,20 防振装置
2 内筒
3 外筒
4、21 弾性連結部
5,6,22、23 すぐり部
11,12 連結脚部
S 内筒の軸芯に直交する面
θb 傾斜角度
DESCRIPTION OF SYMBOLS 1,20 Vibration isolator 2 Inner cylinder 3 Outer cylinder 4,21 Elastic connection part 5,6,22,23 Straight part 11,12 Connection leg part S The surface orthogonal to the axial center of an inner cylinder
θb Tilt angle

Claims (6)

内筒と、該内筒の外方に配置される外筒と、それら内筒と外筒との間に介在される弾性連結部と、を備える防振装置において、
前記弾性連結部をゴム製とするとともに、前記弾性連結部を前記内筒の軸芯と直交する面に対し傾斜させて配置したことを特徴とする防振装置。
In a vibration isolator comprising an inner cylinder, an outer cylinder disposed outside the inner cylinder, and an elastic connecting portion interposed between the inner cylinder and the outer cylinder,
The vibration isolator is characterized in that the elastic connecting portion is made of rubber, and the elastic connecting portion is inclined with respect to a plane orthogonal to the axis of the inner cylinder.
前記弾性連結部を、前記内筒に対して斜め方向から入力する振動方向に対して略直交するように、傾斜させて配置したことを特徴とする請求項1記載の防振装置。   The anti-vibration device according to claim 1, wherein the elastic connecting portion is arranged to be inclined so as to be substantially orthogonal to a vibration direction input from an oblique direction with respect to the inner cylinder. 前記弾性連結部の前記内筒の軸芯と直交する面に対する傾斜角度θbを、0(度)<θb<80(度)の範囲内に設定したことを特徴とする請求項1に記載の防振装置。   2. The prevention according to claim 1, wherein an inclination angle θb of the elastic connecting portion with respect to a plane orthogonal to the axis of the inner cylinder is set in a range of 0 (degrees) <θb <80 (degrees). Shaker. 前記弾性連結部に、複数のすぐり部を形成したことを特徴とする請求項1〜3のいずれか1項に記載の防振装置。   The vibration isolator according to any one of claims 1 to 3, wherein a plurality of straight portions are formed in the elastic connecting portion. 前記弾性連結部が、互いに分離した複数の連結脚部を有することを特徴とする請求項1〜4のいずれか1項に記載の防振装置。   The vibration isolator according to any one of claims 1 to 4, wherein the elastic connecting portion has a plurality of connecting legs separated from each other. 前記外筒が、円筒形状とされたことを特徴とする請求項1〜5のいずれか1項に記載の防振装置。   The vibration isolator according to any one of claims 1 to 5, wherein the outer cylinder has a cylindrical shape.
JP2007038332A 2007-02-19 2007-02-19 Vibration damper Withdrawn JP2008202668A (en)

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