JP2000193004A - Vibration isolator - Google Patents
Vibration isolatorInfo
- Publication number
- JP2000193004A JP2000193004A JP10374274A JP37427498A JP2000193004A JP 2000193004 A JP2000193004 A JP 2000193004A JP 10374274 A JP10374274 A JP 10374274A JP 37427498 A JP37427498 A JP 37427498A JP 2000193004 A JP2000193004 A JP 2000193004A
- Authority
- JP
- Japan
- Prior art keywords
- elastic body
- bracket
- peripheral surface
- press
- inner peripheral
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一般産業機械、自
動車のエンジンマウントや自動車用サスペンションブッ
シュ等として用いられる防振装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration isolator used as an engine mount of a general industrial machine, an automobile, a suspension bush for an automobile, or the like.
【０００２】[0002]
【従来の技術】自動車用のエンジンマウントとして用い
られる防振装置には、円筒状の外筒と、この外筒の中空
部内に配置される円筒状の内筒と、内筒及び外筒との間
に配置されて内筒と外筒とを連結するゴム製弾性体と、
外筒に固定されるブラケット金具とを備えたものがあ
る。このような防振装置は、例えば内筒が振動発生部で
あるエンジンに連結されると共に、ブラケット金具がボ
ルト等により振動受部である車体へ連結される。ここ
で、エンジンからの振動が内筒に伝達されると、この振
動により弾性体が変形すると共に内筒が外筒に対して相
対変位する。このとき、弾性体の内部摩擦により振動エ
ネルギーが吸収されて車体への振動伝達が抑制される。2. Description of the Related Art A vibration isolator used as an engine mount for an automobile includes a cylindrical outer cylinder, a cylindrical inner cylinder disposed in a hollow portion of the outer cylinder, and an inner cylinder and an outer cylinder. A rubber elastic body disposed between and connecting the inner cylinder and the outer cylinder,
There is one provided with a bracket fitting fixed to an outer cylinder. In such a vibration isolator, for example, the inner cylinder is connected to an engine that is a vibration generating unit, and a bracket is connected to a vehicle body that is a vibration receiving unit by a bolt or the like. Here, when vibration from the engine is transmitted to the inner cylinder, the vibration deforms the elastic body and relatively displaces the inner cylinder with respect to the outer cylinder. At this time, the vibration energy is absorbed by the internal friction of the elastic body, and the transmission of vibration to the vehicle body is suppressed.
【０００３】上記の防振装置防振装置では、弾性体が外
筒及び内筒から脱落すること、及び弾性体が外筒内にお
ける所定の位置から移動することを防止する必要があ
る。このため、従来の防振装置では、内筒の外周面上に
弾性体を加硫接着して内筒からの離脱を防止し、この内
筒へ加硫接着された弾性体を外筒の内周面上に加硫接着
し、この弾性体を介して内筒へ連結された外筒をエンジ
ン又は車体側への連結用ブラケット金具の筒部（ブラケ
ット筒部）へ圧入して固定するようにしたものがある。
また、このような防振装置では、一般的に外筒を縮径方
向へ塑性変形させて弾性体の外筒内周面からの剥離や脱
落を防止している。In the above-described vibration isolator, it is necessary to prevent the elastic body from falling off the outer cylinder and the inner cylinder, and to prevent the elastic body from moving from a predetermined position in the outer cylinder. For this reason, in the conventional vibration isolator, the elastic body is vulcanized and adhered on the outer peripheral surface of the inner cylinder to prevent detachment from the inner cylinder. The outer cylinder connected to the inner cylinder via this elastic body is vulcanized and adhered on the peripheral surface, and the outer cylinder connected to the inner cylinder is press-fitted into the cylinder (bracket cylinder) of the bracket fitting for connection to the engine or the vehicle body so as to be fixed. There is something.
Further, in such a vibration isolator, generally, the outer cylinder is plastically deformed in the diameter reducing direction to prevent the elastic body from peeling off or falling off from the inner peripheral surface of the outer cylinder.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上記の
ような防振装置では、弾性体の外筒への加硫接着、外筒
の塑性変形、外筒のブラケット筒部内へ圧入等の工程が
必要となるため組立作業が煩瑣になり、さらに外筒をブ
ラケット筒部とは独立した１部品としなればならことか
ら、製造コストを抑制することが困難であった。However, the above-described vibration isolator requires steps such as vulcanization and adhesion of the elastic body to the outer cylinder, plastic deformation of the outer cylinder, and press-fitting of the outer cylinder into the bracket cylinder. Therefore, the assembling work becomes complicated, and it is difficult to reduce the manufacturing cost because the outer cylinder must be a single part independent of the bracket cylinder.
【０００５】一方、外筒を廃止して弾性体を直接ブラケ
ット筒部へ圧入保持することも考えられるが、このよう
な構成を採用した場合には、弾性体のブラケット筒部内
からの脱落を確実に防止することが困難であった。On the other hand, it is conceivable to eliminate the outer cylinder and press-fit and hold the elastic body directly into the bracket cylinder part. However, if such a configuration is adopted, it is ensured that the elastic body falls out of the bracket cylinder part. It was difficult to prevent.
【０００６】本発明は、上記事実を考慮し、外筒内に圧
入された弾性体のブラケット筒部からの脱落が確実に防
止されると共に、装置の効率的な生産及びコストの抑制
が可能な防振装置を提供することを目的とする。In view of the above facts, the present invention can reliably prevent the elastic body press-fitted into the outer cylinder from falling off from the bracket cylinder, and can efficiently produce the apparatus and suppress the cost. An object is to provide a vibration isolator.
【０００７】[0007]
【課題を解決するための手段】請求項１記載の防振装置
は、振動発生部及び振動受部の一方に連結される内筒
と、前記内筒の外周面に固着された弾性体と、内周側に
形成された中空部内に前記弾性体が非接着で圧入され、
該弾性体を介して中空部内に前記内筒を支持するブラケ
ット筒部と、振動発生部及び振動受部の他方に連結され
ると共に前記ブラケット筒部へ固定されるブラケット金
具とを有する防振装置であって、前記ブラケット金具
は、互いに対向するように支持されて前記ブラケット筒
部の軸方向両端面を挟持する一対の側板部を有し、前記
側板部は、少なくとも前記弾性体の外周面両端部に沿っ
た一部がブラケット筒部の内周面より軸心側へ延出して
弾性体の軸方向側面と対向するように形成されたもので
ある。According to a first aspect of the present invention, there is provided an anti-vibration device comprising: an inner cylinder connected to one of a vibration generator and a vibration receiver; an elastic body fixed to an outer peripheral surface of the inner cylinder; The elastic body is press-fitted into the hollow portion formed on the inner peripheral side without bonding,
An anti-vibration device comprising: a bracket cylinder that supports the inner cylinder in the hollow portion via the elastic body; and a bracket that is connected to the other of the vibration generating unit and the vibration receiving unit and that is fixed to the bracket cylinder. Wherein the bracket has a pair of side plates that are supported so as to face each other and sandwich both axial end surfaces of the bracket tubular portion, and the side plate portions are at least both ends of the outer peripheral surface of the elastic body. A part along the portion extends from the inner peripheral surface of the bracket cylindrical portion to the axial center side and is formed so as to face the axial side surface of the elastic body.
【０００８】上記構成の防振装置によれば、前記ブラケ
ット筒部内に弾性体が非接着状態で保持され、一対の側
板部の少なくとも前記弾性体の外周面両端部に沿った一
部が、それぞれブラケット筒部の内周面より軸心側へ延
出して弾性体の軸方向側面と対向することにより、ブラ
ケット筒部の中空部内へ圧入された弾性体に対して軸心
に沿った外力が作用した場合でも、弾性体の軸方向への
移動が側板部により制限され、弾性体がブラケット筒部
の軸方向端面より外側へ移動することがないので、弾性
体がブラケット筒部の中空部内から脱落しない。According to the above-described vibration isolator, the elastic body is held in the bracket tubular portion in a non-adhered state, and at least a part of the pair of side plate portions along both ends of the outer peripheral surface of the elastic body is respectively formed. The external force along the axis acts on the elastic body that is press-fitted into the hollow part of the bracket cylindrical part by extending toward the axis from the inner peripheral surface of the bracket cylindrical part and facing the axial side surface of the elastic body. In this case, the movement of the elastic body in the axial direction is restricted by the side plate, and the elastic body does not move outside the axial end face of the bracket cylinder, so that the elastic body falls out of the hollow portion of the bracket cylinder. do not do.
【０００９】ここで、弾性体の軸方向両端面が一対の側
板部とそれぞれ当接するように、軸方向における弾性体
の幅をブラケット筒部の幅と略等しい長さにしておけ
ば、弾性体がブラケット筒部内での軸方向への移動を防
止できる。Here, if the width of the elastic body in the axial direction is set to be substantially equal to the width of the bracket cylinder so that both end faces in the axial direction of the elastic body abut against the pair of side plates, respectively, Can be prevented from moving in the axial direction within the bracket cylinder.
【００１０】請求項２記載の防振装置は、請求項１記載
の防振装置において、前記ブラケット筒部は、軸直角断
面の形状が略楕円形状とされた中空部を有し、かつ前記
弾性体は、前記中空部の内周面における長軸方向両端部
にそれぞれ圧接する一対の圧接部を有するものである。According to a second aspect of the present invention, in the vibration isolator according to the first aspect, the bracket tube has a hollow portion having a substantially elliptical cross section perpendicular to the axis, and the elastic member has a hollow section. The body has a pair of press-contact portions that press-contact each other at both ends in the long axis direction on the inner peripheral surface of the hollow portion.
【００１１】上記構成の防振装置によれば、ブラケット
筒部の中空部の軸直角断面形状が略楕円形状とされ、か
つ弾性体が、中空部の内周面における長軸方向両端部に
それぞれ圧接する一対の圧接部を有することにより、ブ
ラケット筒部の中空部内へ圧入された弾性体に軸心回り
の回転方向の外力が作用した場合でも、弾性体の圧接部
がブラケット筒部の内周面に沿って移動するには、弾性
体が中空部の径が狭くなる内周面に沿って弾性変形する
必要があるので、圧接部には弾性体の変形抵抗に応じた
抵抗力が作用し、この抵抗力により弾性体のブラケット
筒部の中空部内での回転を防止できる。According to the vibration isolator of the above construction, the hollow portion of the bracket cylindrical portion has a substantially elliptical cross-section perpendicular to the axis, and the elastic members are provided at both ends in the long axis direction on the inner peripheral surface of the hollow portion. By having a pair of press-contact portions that press against each other, even when an external force in the rotation direction around the axis is applied to the elastic body press-fitted into the hollow portion of the bracket tube portion, the press-contact portion of the elastic body has In order to move along the surface, it is necessary for the elastic body to elastically deform along the inner peripheral surface where the diameter of the hollow part becomes smaller, so that a resistance force corresponding to the deformation resistance of the elastic body acts on the press contact part. By this resistance, the rotation of the elastic body in the hollow portion of the bracket cylindrical portion can be prevented.
【００１２】請求項３記載の防振装置は、請求項１記載
の防振装置において、前記弾性体には、それぞれ前記内
筒の軸心に対して放射状に延出し前記ブラケット筒部の
内周面に圧接する一対の圧接部が形成され、かつ前記中
空部の内周面には、径方向内側へ突出すると共に一対の
前記圧接部のブラケット筒部の内周面に沿った端部にそ
れぞれ接して圧接部の中空部内周面に沿った移動を拘束
する凸状の回転拘束部が設けられたものである。According to a third aspect of the present invention, in the vibration isolator according to the first aspect, each of the elastic members extends radially with respect to an axis of the inner cylinder and an inner periphery of the bracket cylindrical portion. A pair of press-contact portions that press against the surface are formed, and the inner peripheral surface of the hollow portion protrudes inward in the radial direction, and is provided at an end along the inner peripheral surface of the bracket cylindrical portion of the pair of press-contact portions, respectively. A convex rotation restricting portion is provided to contact and restrict the movement of the pressure contact portion along the inner peripheral surface of the hollow portion.
【００１３】上記構成の防振装置によれば、弾性体に
は、ブラケット筒部の内周面に圧接する一対の圧接部が
形成され、かつ中空部の内周面には、径方向内側へ突出
すると共に弾性体の圧接部のブラケット筒部の内周面に
沿った端部にそれぞれ接して圧接部のブラケット筒部の
内周面に沿った移動を拘束する凸状の回転拘束が設けら
れたことにより、ブラケット筒部の中空部内へ圧入され
た弾性体に、軸心に対する回転方向の外力が作用した場
合でも、弾性体の圧接部がブラケット筒部の内周面に沿
って移動するには、弾性体が回転拘束部に沿って弾性変
形する必要があるので、圧接部には弾性体の変形抵抗に
応じた抵抗力が作用し、この抵抗力により弾性体のブラ
ケット筒部の中空部内での回転を防止できる。According to the vibration damping device having the above structure, the elastic body is formed with a pair of press-contact portions that press against the inner peripheral surface of the bracket tubular portion, and the inner peripheral surface of the hollow portion is radially inward. A protruding rotation constraint is provided to protrude and contact the ends of the elastic member along the inner peripheral surface of the bracket tube portion to restrict the movement of the press-contact portion along the inner peripheral surface of the bracket tube portion. Thus, even when an external force in the rotational direction with respect to the axis is applied to the elastic body press-fitted into the hollow portion of the bracket tubular portion, the press-contact portion of the elastic body moves along the inner peripheral surface of the bracket tubular portion. Since the elastic body needs to be elastically deformed along the rotation restricting portion, a resistance force corresponding to the deformation resistance of the elastic body acts on the press contact portion, and this resistance force causes the inside of the hollow portion of the bracket cylindrical portion of the elastic body to move. Rotation can be prevented.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態に係る
防振装置について図面を参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vibration isolator according to an embodiment of the present invention will be described with reference to the drawings.
【００１５】（第１の実施形態）図１及び図２には、本
発明の第１の実施形態に係る防振装置が示されている。
この防振装置１０は所謂ブッシュタイプの防振装置であ
って、本実施形態では車両のエンジンマウントとして適
用されている。防振装置１０は、図１及び図２に示され
るようにブラケット金具２０の一部として構成された円
筒状の筒部１２と、この筒部１２の中空部１４内に配置
された円筒状の内筒１６と、筒部１２と内筒１６との間
へ配置された弾性体１８と、筒部１２が固定されるブラ
ケット金具２０とを備えている。(First Embodiment) FIGS. 1 and 2 show a vibration damping device according to a first embodiment of the present invention.
The vibration isolator 10 is a so-called bush type vibration isolator, and is applied as an engine mount of a vehicle in the present embodiment. As shown in FIGS. 1 and 2, the vibration isolator 10 includes a cylindrical tubular portion 12 configured as a part of a bracket 20 and a cylindrical tubular portion disposed in a hollow portion 14 of the tubular portion 12. An inner cylinder 16, an elastic body 18 disposed between the cylinder 12 and the inner cylinder 16, and a bracket 20 to which the cylinder 12 is fixed are provided.
【００１６】筒部１２はステンレス等の金属からなり、
この筒部１２には、図２に示されるように軸心Ｓに沿っ
た軸方向両側の端面１２Ａ，１２Ｂにそれぞれ一対の位
置決め部１２Ｃが形成されている。一対の位置決め部１
２Ｃは、筒部１２の端面１２Ａ，１２Ｂから円筒壁部の
一部を軸方向へ略コ字状に突出させることにより形成さ
れており、筒部１２の軸心Ｓに対して互いに対称的な２
位置に配置されている。また位置決め部１２Ｃはそれぞ
れ同一形状とされており、後述するブラケット金具２０
の側板部２２，２４の外形形状に対応する周長及び突出
長を有している。The cylindrical portion 12 is made of a metal such as stainless steel,
As shown in FIG. 2, a pair of positioning portions 12C are formed in the cylindrical portion 12 on both end surfaces 12A and 12B in the axial direction along the axis S. A pair of positioning parts 1
2C is formed by projecting a part of the cylindrical wall portion from the end surfaces 12A and 12B of the cylindrical portion 12 in a substantially U-shape in the axial direction, and is symmetric with respect to the axis S of the cylindrical portion 12. 2
Is located in the position. Further, the positioning portions 12C have the same shape, respectively, and a bracket 20 described later is used.
Has a peripheral length and a protruding length corresponding to the outer shape of the side plate portions 22 and 24.
【００１７】内筒１６は、筒部１２に対して小径とされ
ると共に、軸方向へは僅かに長く形成されている。本実
施形態では内筒１６は車両における振動発生部であるエ
ンジン（図示省略）に連結される。内筒１６の外周面に
は、図１に示されるように軸方向中間部にそれぞれ径方
向へ突出する一対のストッパ支持部１６Ａが設けられて
いる。一対のストッパ支持部１６Ａは、それぞれ略直方
体のブロック状に形成されており、軸心Ｓに対して対称
的な２位置に配置されている。The inner cylinder 16 has a smaller diameter than the cylinder portion 12 and is formed slightly longer in the axial direction. In the present embodiment, the inner cylinder 16 is connected to an engine (not shown) that is a vibration generating unit in the vehicle. As shown in FIG. 1, a pair of stopper support portions 16 </ b> A that protrude in the radial direction are provided on the outer peripheral surface of the inner cylinder 16 at the axially intermediate portion. Each of the pair of stopper support portions 16A is formed in a substantially rectangular parallelepiped block shape, and is disposed at two positions symmetrical with respect to the axis S.
【００１８】内筒１６の外周面にはゴム製の弾性体１８
が加硫接着されている。この内筒１６に加硫接着された
弾性体１８は、図１に示されるように装置が組み立てら
れた状態では筒部１２の中空部１４内へ圧入される。弾
性体１８は軸方向から見た形状が軸心Ｓを中心として互
いに直交する中心軸Ｃ1 ，Ｃ2 に沿って径方向へそれぞ
れ延出する延出部を有する略Ｘ字状に形成されている。
ここで、弾性体１８の中心軸Ｃ1 に沿って延出する一対
の延出部は、それぞれ筒部１２の内周面に延出端部を圧
接させる圧接部２６として構成され、また弾性体１８の
中心軸Ｃ2 に沿って延出する一対の延出部は、それぞれ
筒部１２の内周面に延出端部を対向させると共に、内筒
１６のストッパ支持部１６Ａを覆うストッパ部２８とし
て構成されている。An elastic body 18 made of rubber is provided on the outer peripheral surface of the inner cylinder 16.
Are vulcanized and adhered. The elastic body 18 vulcanized and bonded to the inner tube 16 is pressed into the hollow portion 14 of the tube portion 12 when the device is assembled as shown in FIG. The shape of the elastic body 18 as viewed from the axial direction is formed in a substantially X-shape having extensions extending radially along central axes C 1 and C 2 orthogonal to each other about the axis S. I have.
Here, the pair of extending portions extending along the central axis C 1 of the elastic body 18 are each configured as a press contact portion 26 for pressing the extending end to the inner peripheral surface of the cylindrical portion 12. a pair of extending portions extending along the central axis C 2 of 18, causes face the extending end portion on the inner peripheral surface of each cylindrical portion 12, a stopper portion 28 which covers the stopper support portion 16A of the inner cylinder 16 Is configured as
【００１９】圧接部２６の軸方向から見た断面形状は、
中心軸Ｃ1 に沿って長い略長方形状に形成されている。
圧接部２６の延出端部には、その周方向における幅が基
端部側の幅より広くなるように周方向外側へ突出する突
出部２６Ａが形成されている。これにより、中心軸Ｃ1
に沿った弾性体１８のばね定数を必要以上大きくすると
なく、圧接部２６と筒部１２の内周面への接触面積とし
て十分大きな面積を確保することが可能になる。また圧
接部２６の筒部１２への接触面は、筒部１２への圧入前
には筒部１２の内周面の曲率半径より僅かに曲率半径が
小さい凸状の曲面とされている。弾性体１８の延出端部
の軸方向における長さは筒部１２の端面１２Ａ，１２Ｂ
間の距離と等しくされている。弾性体１８の中心軸Ｃ1
に沿った自然長は、筒部１２の内径より所定長だけ長く
されている。これにより、弾性体１８の中心軸Ｃ1 に沿
った自然長と筒部１２の内径との差だけ中心軸Ｃ1 に沿
って圧縮され、この圧縮量に対応する加圧力で圧接部２
６は筒部１２の内周面へ圧接する。The cross-sectional shape of the press contact portion 26 viewed from the axial direction is as follows.
Along the central axis C 1 is formed in a long substantially rectangular shape.
A protruding portion 26A that protrudes outward in the circumferential direction is formed at the extension end of the press contact portion 26 so that the width in the circumferential direction is wider than the width on the base end side. Thereby, the center axis C 1
It is possible to secure a sufficiently large area as a contact area between the press contact portion 26 and the inner peripheral surface of the cylindrical portion 12 without increasing the spring constant of the elastic body 18 along the length of the elastic member 18 more than necessary. Further, the contact surface of the press-contact portion 26 with the cylinder portion 12 is a convex curved surface having a radius of curvature slightly smaller than the radius of curvature of the inner peripheral surface of the cylinder portion 12 before press-fitting into the cylinder portion 12. The length of the extended end of the elastic body 18 in the axial direction is equal to the end surfaces 12A and 12B of the cylindrical portion 12.
The distance between them is equal. The central axis C 1 of the elastic body 18
Is longer than the inner diameter of the cylindrical portion 12 by a predetermined length. As a result, the elastic member 18 is compressed along the central axis C 1 by a difference between the natural length along the central axis C 1 and the inner diameter of the cylindrical portion 12, and the pressing portion 2 is pressed with a pressing force corresponding to the amount of compression.
6 is pressed against the inner peripheral surface of the cylindrical portion 12.
【００２０】一方、弾性体１８の中心軸Ｃ2 に沿って延
出する一対の延出部は、それぞれ筒部１２の内周面に延
出端部を対向させると共に内筒１６のストッパ支持部１
６Ａを覆うストッパ部２８として構成されている。この
ストッパ部２８の周方向の幅は圧接部２６より十分広く
され、かつにストッパ部２８は内筒１６のストッパ支持
部１６Ａにより中心軸Ｃ2 に沿った肉厚が薄くされてい
る。On the other hand, a pair of extending portions extending along the central axis C 2 of the elastic body 18 have their extending ends opposed to the inner peripheral surface of the cylindrical portion 12, respectively. 1
It is configured as a stopper 28 that covers 6A. The circumferential width of the stopper portion 28 is sufficiently wider than the press-contact portion 26, and the stopper portion 28 thickness along the central axis C 2 by the stopper support portion 16A of the inner cylinder 16 is thin.
【００２１】また弾性体１８の中心軸Ｃ2 に沿った自然
長は、筒部１２の内径より所定長だけ短くされている。
これにより、筒１２，１６間に外力が作用しておらず、
弾性体１８が弾性変形していない復元状態では、図１に
示されるようにストッパ部２８の延出端部は筒部１２の
内周面から離間する。ストッパ部２８の延出端面は、筒
部１２の内周面の曲率半径より小さい曲率半径の凸状曲
面とされており、このストッパ部２８の延出端面には、
図２に示されるように軸方向に延在するリブ状の突起２
８Ａが周方向へ一定のピッチ毎に設けられている。これ
により、ストッパ部２８の延出端面と筒部１２の内周面
との接触面積を小さくし、ストッパ部２８の延出端面が
長時間、筒部１２の内周面上へ加圧状態で接触していた
場合でも、ゴム製のストッパ部２８の延出端面が筒部１
２の内周面に圧着することを防止している。The natural length of the elastic body 18 along the central axis C 2 is shorter than the inner diameter of the cylindrical portion 12 by a predetermined length.
As a result, no external force acts between the cylinders 12 and 16,
In the restored state in which the elastic body 18 is not elastically deformed, the extended end of the stopper portion 28 is separated from the inner peripheral surface of the cylindrical portion 12 as shown in FIG. The extended end surface of the stopper portion 28 is a convex curved surface having a radius of curvature smaller than the radius of curvature of the inner peripheral surface of the cylindrical portion 12.
As shown in FIG. 2, rib-like projections 2 extending in the axial direction
8A are provided at regular intervals in the circumferential direction. Thereby, the contact area between the extended end surface of the stopper portion 28 and the inner peripheral surface of the cylindrical portion 12 is reduced, and the extended end surface of the stopper portion 28 is pressed against the inner peripheral surface of the cylindrical portion 12 for a long time. Even if it is in contact, the extending end surface of the rubber stopper 28 is
2 is prevented from being pressed against the inner peripheral surface.
【００２２】振動受部である車体（図示省略）に固定さ
れるブラケット金具２０は、ステンレス板等の金属板を
コ字状に屈曲して形成されており、このブラケット金具
２０には、図２に示されるように底板部３０の軸方向両
端部から直角に屈曲された側板部２２，２４が形成され
ている。一対の側板部２２，２４は、筒部１２の端面１
２Ａ，１２Ｂ間の距離に略等しい間隔を空けて互いに平
行となるように支持されている。底板部３０には、その
両端部にそれぞれ板厚方向へ貫通する貫通穴３０Ａが形
成されており、底板部３０の上面には一対の貫通穴３０
Ａ上にブロック状のナット部材３３が溶接等により固定
されている。このナット部材３３には、同軸的に貫通穴
３０Ａに連通するめねじ穴３３Ａが貫通している。ブラ
ケット金具２０を車体へ固定する際には、車体側へ設け
られたフランジ部を挿通したボルト（図示省略）をブラ
ケット金具２０の底面側からナット部材３３のめねじ穴
３３Ａへ規定の締結トルクが発生するまでねじ込むこと
により、ブラケット金具２０が車体へ固定される。A bracket 20 fixed to a vehicle body (not shown), which is a vibration receiving portion, is formed by bending a metal plate such as a stainless steel plate into a U-shape. As shown in FIG. 2, side plate portions 22 and 24 are formed at right angles from both ends in the axial direction of the bottom plate portion 30. The pair of side plate portions 22 and 24 are connected to the end surface 1 of the cylindrical portion 12.
They are supported so as to be parallel to each other with an interval substantially equal to the distance between 2A and 12B. The bottom plate 30 has through holes 30A formed at both ends thereof in the thickness direction, and a pair of through holes 30 formed on the upper surface of the bottom plate 30.
A block-shaped nut member 33 is fixed on A by welding or the like. The nut member 33 has a female screw hole 33A that coaxially communicates with the through hole 30A. When the bracket 20 is fixed to the vehicle body, a bolt (not shown) having a flange portion provided on the vehicle body side is inserted into the female screw hole 33 </ b> A of the nut member 33 from the bottom side of the bracket 20 by a specified fastening torque. By screwing in until it occurs, the bracket 20 is fixed to the vehicle body.
【００２３】ブラケット金具２０の一対の側板部２２，
２４は同一形状とされており、側板部２２，２４の板厚
は、筒部１２の位置決め部１２Ｃの端面１２Ａ，１２Ｂ
からの突出長と略等しい厚さとされている。側板部２
２，２４の中央部には筒部１２に対応する形状の開口部
３２が形成されている。開口部３２は、軸方向から見た
形状が図１に示されるように側板部２２，２４の上端部
付近を開口端３２Ａとする略Ｕ状に形成されており、開
口部３２の内周面には、開口端３２Ａとは逆側の底部に
筒部１２の位置決め部１２Ｃに対応する凹部３２Ｂが形
成されている。また開口部３２の内周面における開口端
３２Ａと凹部３２Ｂとの間は、筒部１２の内周面の曲率
半径より所定長小さい曲率半径の凹状の曲面部３２Ｃと
されている。凹部３２Ｂは、曲面部３２Ｃの曲面を延長
した仮想の延長曲面Ｐ（図１参照）より径方向外側へ略
コ字状に凹んでおり、凹部３２Ｃの底部には、筒部１２
の外周面の曲率半径と略等しい曲率半径の凹状曲面から
なる支持面３２Ｄが形成され、この支持面３２Ｄの周長
は、図１に示されるように筒部１２の位置決め部１２Ｃ
の外周面の周長より僅かに長くされている。A pair of side plate portions 22 of the bracket 20,
24 have the same shape, and the plate thickness of the side plate portions 22 and 24 is the same as the end surfaces 12A and 12B of the positioning portion 12C of the cylindrical portion 12.
The thickness is approximately equal to the length of the protrusion from the projection. Side plate 2
An opening 32 having a shape corresponding to the cylindrical portion 12 is formed at the center of the tubes 2 and 24. As shown in FIG. 1, the opening 32 is formed in a substantially U-shape with the vicinity of the upper ends of the side plates 22 and 24 as the opening end 32 </ b> A as shown in FIG. 1. A concave portion 32B corresponding to the positioning portion 12C of the cylindrical portion 12 is formed in the bottom of the cylindrical portion 12 opposite to the opening end 32A. Further, between the opening end 32A and the concave portion 32B on the inner peripheral surface of the opening 32, a concave curved surface portion 32C having a radius of curvature smaller by a predetermined length than the radius of curvature of the inner peripheral surface of the cylindrical portion 12 is formed. The concave portion 32B is substantially radially outwardly depressed from a virtual extended curved surface P (see FIG. 1) obtained by extending the curved surface of the curved surface portion 32C, and the bottom of the concave portion 32C has a cylindrical portion 12C.
The support surface 32D is formed of a concave curved surface having a radius of curvature substantially equal to the radius of curvature of the outer peripheral surface of the cylindrical portion 12. The circumferential length of the support surface 32D is, as shown in FIG.
Is slightly longer than the circumferential length of the outer peripheral surface of.
【００２４】ここで、開口部３２の開口端３２Ａの周方
向中心点と支持面３２ＤＦの周方向中心点とを結ぶ直線
は、底板部３０に対して所定角度傾いており、開口部３
２は前記直線を対称軸とし、この対称軸に対して対称的
な形状とされている。また組立状態の防振装置１０で
は、図１に示されるように軸方向から見てストッパ部２
８の中心軸Ｃ2 が開口部３２の対称軸と一致するように
弾性体１８が固定されている。Here, a straight line connecting the circumferential center of the opening end 32A of the opening 32 and the circumferential center of the support surface 32DF is inclined at a predetermined angle with respect to the bottom plate 30.
Reference numeral 2 designates the straight line as an axis of symmetry, and has a shape symmetrical with respect to the axis of symmetry. In the vibration isolator 10 in the assembled state, as shown in FIG.
The elastic body 18 is fixed such that the center axis C 2 of the opening 8 coincides with the axis of symmetry of the opening 32.
【００２５】次に、上記のように各構成部品が構成され
た防振装置１０の組立方法を説明する。先ず、ブラケッ
ト金具２０には筒部１２が固定される。この際、ブラケ
ット金具２０の一対の側板部２２，２４の間に筒部１２
が中心軸Ｃ2 に沿って挿入され、これにより、筒部１２
の両端面１２Ａ，１２Ｂが一対の側板部２２，２４によ
り挟持される。また筒部１２を一対の側板部２２，２４
の間に挿入しつつ、筒部１２の一対の位置決め部１２Ｃ
の一方を凹部３２Ｂへ挿入される。このとき、位置決め
部１２Ｃの外周面と凹部３２Ｃの支持面３２Ｄとの曲率
半径が一致しているので、位置決め部１２Ｃの外周面は
凹部３２Ｂの支持面３２Ｄと隙間なく接触する。また位
置決め部１２Ｃの一方が凹部３２Ｂへ挿入されると、位
置決め部１２Ｃの他方は開口部３２の開口端３２Ａに面
する位置に支持される。Next, a description will be given of a method of assembling the vibration isolator 10 having the above-described components. First, the tubular portion 12 is fixed to the bracket 20. At this time, the cylindrical portion 12 is located between the pair of side plate portions 22 and 24 of the bracket 20.
Is inserted along the central axis C 2 , whereby the cylindrical portion 12
Are sandwiched between a pair of side plates 22, 24. Further, the cylindrical portion 12 is connected to a pair of side plate portions 22 and 24.
And a pair of positioning portions 12C of the cylindrical portion 12
Is inserted into the recess 32B. At this time, since the radius of curvature of the outer peripheral surface of the positioning portion 12C matches the radius of curvature of the support surface 32D of the concave portion 32C, the outer peripheral surface of the positioning portion 12C contacts the support surface 32D of the concave portion 32B without any gap. When one of the positioning portions 12C is inserted into the concave portion 32B, the other of the positioning portions 12C is supported at a position facing the opening end 32A of the opening portion 32.
【００２６】位置決め部１２Ｃと支持面３２Ｄと隙間な
く接触させることにより、一対の側板部２２，２４によ
り挟持された筒部１２は、筒部１２の軸心Ｓが曲面部３
２Ｃの曲率中心と一致するように位置決めされる。この
ように位置決めされた状態で、筒部１２は溶接等により
ブラケット金具２０に固定される。By bringing the positioning portion 12C and the support surface 32D into contact with each other without any gap, the cylindrical portion 12 sandwiched between the pair of side plate portions 22, 24 has the axis S of the cylindrical portion 12 curved.
It is positioned so as to coincide with the center of curvature of 2C. In this state, the cylindrical portion 12 is fixed to the bracket 20 by welding or the like.
【００２７】前述したように曲面部３２Ｃの曲率半径
は、筒部１２の内周面の曲率半径より所定長小さくされ
ている。従って、側板部２２，２４の曲面部３２Ｃに沿
って部分は筒部１２の内周面より軸心Ｓ側へ延出する。
このとき、軸心Ｓに対する径方向における側板部２２，
２４の筒部１２の内周面からの延出長Ｌ（図１参照）
は、弾性体１８の脱落を防止するため１ｍｍ以上必要で
あり、また後述するように曲面部３２Ｃ間を通して筒部
１２内へ弾性体１８を圧入する場合には５ｍｍ以下にし
ておくことが望ましい。但し、弾性体１８を筒部１２の
中空部１４内へ挿入した後に、筒部１２をブラケット金
具２０へ固定する場合には、側板部２２，２４の筒部１
２の内周面からの延出長Ｌを５ｍｍより長くしても、防
振装置１０の組立時に問題は生じず、また弾性体１８を
筒部１２の中空部１４内に圧入する作業が容易になる。As described above, the radius of curvature of the curved portion 32C is smaller than the radius of curvature of the inner peripheral surface of the cylindrical portion 12 by a predetermined length. Therefore, the portion extends along the curved surface portion 32C of the side plate portions 22 and 24 toward the axis S from the inner peripheral surface of the cylindrical portion 12.
At this time, the side plate portions 22 in the radial direction with respect to the axis S,
Extension length L of the cylindrical portion 12 from the inner peripheral surface (see FIG. 1)
Is required to be 1 mm or more in order to prevent the elastic body 18 from falling off, and it is desirable to set the elastic body 18 to 5 mm or less when the elastic body 18 is press-fitted into the cylindrical portion 12 between the curved surfaces 32C as described later. However, when the cylinder 12 is fixed to the bracket 20 after the elastic body 18 is inserted into the hollow portion 14 of the cylinder 12, the cylinder 1 of the side plates 22, 24 is required.
Even if the extension length L from the inner peripheral surface of the cylinder 2 is longer than 5 mm, no problem occurs at the time of assembling the vibration isolator 10 and the work of press-fitting the elastic body 18 into the hollow portion 14 of the cylindrical portion 12 is easy. become.
【００２８】また本実施形態の防振装置１０では、圧接
部２６が筒部１２の内周面へ圧接していない状態では筒
部１２内で弾性体１８が回転可能になるので、弾性体１
８を中心軸Ｃ1 に沿って圧縮し、この弾性体１８を図１
に示される取付方向から略９０°回転させて筒部１２内
へ挿入した後、弾性体１８を取付方向と一致するように
筒部１２内で回転させてもよい。In the vibration isolator 10 of the present embodiment, the elastic member 18 can rotate in the cylindrical portion 12 when the pressure contact portion 26 is not pressed against the inner peripheral surface of the cylindrical portion 12.
8 is compressed along the central axis C 1 , and this elastic body 18 is
After being rotated by approximately 90 ° from the mounting direction shown in (1) and inserted into the cylindrical portion 12, the elastic body 18 may be rotated within the cylindrical portion 12 so as to coincide with the mounting direction.
【００２９】ブラケット金具２０に固定された筒部１２
の中空部１４内には弾性体１８が圧入される。弾性体１
８を中空部１４内へ圧入する際には、先ず、弾性体１８
を、ブラケット金具２０の側方で中心軸Ｃ2 が開口部３
２の対称軸と一致するように位置決めする。そして、専
用治具（図示省略）を使用して弾性体１８を、中心軸Ｃ
1 に沿った長さが曲面部３２Ｃ間の距離より小さくなる
ように圧縮変形させる。このように圧縮変形させた状態
で、弾性体１８を一対の曲面部３２Ｃ間を通して筒部１
２の中空部１４内へ挿入する。中空部１４内への挿入が
完了した後、弾性体１８を圧縮力から開放すると、弾性
体１８の中心軸Ｃ1 に沿った長さ、すなわち圧接部２６
の延出端間の距離が、筒部１２の内径と等しくなるまで
復元する。このとき、弾性体１８の中心軸Ｃ1 に沿った
自然長が筒部１２の内径より長くされていることから、
弾性体１８の圧接部２６は、弾性体１８の中心軸Ｃ1 に
沿った自然長と筒部１２の内径との差、及び弾性体１８
の中心軸Ｃ1 に沿った方向のばね定数に対応する圧力で
筒部１２の内周面へ圧接する。The cylindrical portion 12 fixed to the bracket 20
The elastic body 18 is press-fitted into the hollow portion 14 of the first embodiment. Elastic body 1
When press-fitting the inside of the hollow portion 14, first,
And the central axis C 2 on the side of the bracket 20 has an opening 3
Positioning is performed so as to coincide with the two axes of symmetry. Then, the elastic body 18 is moved to the center axis C by using a dedicated jig (not shown).
Compression deformation is performed so that the length along 1 is smaller than the distance between the curved surface portions 32C. In the state of being compressed and deformed in this manner, the elastic body 18 is passed through the space between the pair of curved surfaces 32C to form the cylindrical portion 1.
2 into the hollow portion 14. After insertion into the hollow portion 14 is completed, the opened elastic body 18 from the compressive force, the length along the center axis C 1 of the elastic body 18, i.e. the pressure contact portion 26
Is restored until the distance between the extended ends becomes equal to the inner diameter of the cylindrical portion 12. At this time, since the natural length along the central axis C 1 of the elastic body 18 is longer than the inner diameter of the cylindrical portion 12,
The press-contact portion 26 of the elastic member 18 has a difference between the natural length of the elastic member 18 along the central axis C 1 and the inner diameter of the cylindrical portion 12 and the elastic member 18.
To the press-contact with the center axis corresponding pressure in the direction of the spring constants along the C 1 to the inner peripheral surface of the cylindrical portion 12.
【００３０】また、本実施形態の防振装置１０が適用さ
れる車両では、エンジンの自重による荷重の大部分が図
示しない他の防振装置等により支持される。従って、防
振装置１０は、エンジンが搭載されたマウント状態で
も、エンジンからの振動が伝達されていない時には筒部
１２と内筒１６とが互いに略同軸的な位置に保持され、
エンジンからの振動伝達時に弾性体１８が変形して筒部
１２と内筒１６とが相対変位する。In a vehicle to which the vibration isolator 10 of the present embodiment is applied, most of the load due to the own weight of the engine is supported by another vibration isolator (not shown) or the like. Therefore, in the vibration isolator 10, even when the engine is mounted, when the vibration from the engine is not transmitted, the cylinder portion 12 and the inner cylinder 16 are held at substantially coaxial positions with each other,
When vibration is transmitted from the engine, the elastic body 18 is deformed and the cylinder portion 12 and the inner cylinder 16 are relatively displaced.
【００３１】次に、本実施形態に係る防振装置１０の作
用を説明する。Next, the operation of the vibration isolator 10 according to the present embodiment will be described.
【００３２】エンジンからの振動が内筒１６へ伝達され
ると弾性体１８が弾性変形する。このため、弾性体１８
の内部摩擦により振動エネルギーが吸収され、筒部１２
及びブラケット金具２０を介して車体側へ伝達される振
動が減衰する。このような、弾性体１８の内部摩擦によ
る振動エネルギーの吸収は、主として弾性体１８が中心
軸Ｃ1 に沿って弾性変形することにより行われる。また
エンジンから内筒１６へ中心軸Ｃ2 に沿った方向の過大
な荷重が伝達された場合には、ストッパ部２８が筒部１
２の内周面に圧接する。このとき、ストッパ部２８の中
心軸Ｃ2 に沿った方向の弾性変形がストッパ支持部１６
Ａにより制限されることから、エンジンから内筒１６へ
中心軸Ｃ2 に沿った方向の過大な荷重が伝達された場合
でも、内筒１６が、中心軸Ｃ2 に沿って変位することが
防止される。When vibration from the engine is transmitted to the inner cylinder 16, the elastic body 18 is elastically deformed. For this reason, the elastic body 18
Vibration energy is absorbed by the internal friction of
In addition, the vibration transmitted to the vehicle body via the bracket 20 is attenuated. Such absorption of vibration energy by internal friction of the elastic body 18 is carried out mainly by the elastic body 18 is elastically deformed along the central axis C 1. In the case where the direction of the excessive load along the central axis C 2 to the inner cylinder 16 from the engine is transmitted, the stopper portion 28 is cylindrical portion 1
2 is pressed against the inner peripheral surface. At this time, the central axis C 2 direction of the elastic deformation along the stopper support portion 16 of the stopper portion 28
From being restricted by A, prevented even when an excessive load in the direction along the central axis C 2 to the inner cylinder 16 from the engine is transmitted, the inner cylinder 16, displaced along the central axis C 2 Is done.
【００３３】また本実施形態の防振装置１０によれば、
ブラケット金具２０一対の側板部２２，２４が筒部１２
の両端面１２Ａ，１２Ｂを挟持し、一対の側板部２２，
２４の曲面部３２Ｃがそれぞれ筒部１２内周面より軸心
Ｓ側へ延出して弾性体１２の圧接部２６の側面と対向す
ることにより、筒部１２の中空部１４内へ圧入された弾
性体１８に対して軸心Ｓに沿った外力が作用した場合で
も、弾性体１８の軸方向への移動が側板部２２，２４に
より阻止されるので、弾性体１８が筒部１２の中空部１
４内から脱落することを防止できる。According to the vibration damping device 10 of the present embodiment,
The bracket fitting 20 has a pair of side plate portions 22, 24 formed on the cylindrical portion 12.
, And a pair of side plate portions 22,
Each of the 24 curved surface portions 32C extends toward the axis S from the inner peripheral surface of the cylindrical portion 12 and faces the side surface of the press-contact portion 26 of the elastic body 12, whereby the elasticity pressed into the hollow portion 14 of the cylindrical portion 12 is formed. Even when an external force along the axis S acts on the body 18, the elastic body 18 is prevented from moving in the axial direction by the side plates 22, 24.
4 can be prevented from falling off.
【００３４】さらに本実施形態の防振装置１０では、弾
性体１８の脱落を防止するため筒部１２の両端面１２
Ａ，１２Ｂ付近を縮径方向へ塑性変形させるなどの複雑
な加工を行う必要がなく、従来から使用されていたブラ
ケット金具２０の形状を僅かに変更するだけで、弾性体
１８の筒部１２からの脱落を防止できる。Further, in the vibration isolator 10 of the present embodiment, both end faces 12 of the cylindrical portion 12 are prevented in order to prevent the elastic body 18 from falling off.
There is no need to perform complicated processing such as plastic deformation of the vicinity of A and 12B in the diameter reducing direction, and the tube part 12 of the elastic body 18 can be easily changed by slightly changing the shape of the bracket 20 used conventionally. Can be prevented from falling off.
【００３５】（第２の実施形態）図３及び図４には、本
発明の第２の実施形態に係る防振装置が示されている。
なお、図１及び図２に基づいて説明した第１の実施形態
に係る防振装置１０と同一部材には同一符号を付し、重
複した説明を省略する。(Second Embodiment) FIGS. 3 and 4 show a vibration damping device according to a second embodiment of the present invention.
The same members as those of the vibration isolator 10 according to the first embodiment described with reference to FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description will be omitted.
【００３６】本実施形態の防振装置４０では、図３に示
されるようにブラケット金具２０の一部として構成され
た筒部４２が軸方向から見て略楕円状に形成されてい
る。この筒部４２は肉厚一定の金属板からなる。従っ
て、この筒部４２の中空部４４も軸直角断面が略楕円状
に形成される。また筒部４２の両端面４２Ａ，４２Ｂに
は、短軸方向両端部にそれぞれ第１の実施形態の外筒１
２と同様に一対の位置決め部１２Ｃがそれぞれ形成され
ている。In the vibration isolator 40 of the present embodiment, as shown in FIG. 3, the cylindrical portion 42 formed as a part of the bracket 20 is formed in a substantially elliptical shape when viewed from the axial direction. The cylindrical portion 42 is made of a metal plate having a constant thickness. Therefore, the hollow portion 44 of the cylindrical portion 42 also has a substantially elliptical cross section perpendicular to the axis. In addition, the outer cylinder 1 of the first embodiment is provided on both end surfaces 42A and 42B of the cylindrical portion 42 at both ends in the short axis direction.
Similarly to 2, a pair of positioning portions 12C are formed.
【００３７】ここで、中空部４４の長軸方向は、弾性体
１８の圧接部２６の中心軸Ｃ1 と平行とされる弾性体１
８の取付方向とされている。そして、弾性体１８の中心
軸Ｃ 1 に沿った自然長は、筒部４２の長軸方向における
内径より所定長だけ長くされている。また弾性体１８の
中心軸Ｃ2 に沿った自然長は、外筒１２の短軸方向にお
ける内径より所定長だけ短くされている。これにより、
弾性体１８が筒部４２内へ圧入された組立状態では、弾
性体１８の一対の圧接部２６が筒部４２の内周面の長軸
方向両端部に圧接し、また弾性体１８が弾性変形してい
ない復元状態では、ストッパ部２８の延出端部が筒部４
２の内周面から離間する。Here, the major axis direction of the hollow portion 44 is an elastic body.
The central axis C of the press contact portion 18 of FIG.1Elastic body 1 parallel to
8 is the mounting direction. And the center of the elastic body 18
Axis C 1Is the natural length along the longitudinal direction of the cylindrical portion 42.
It is longer than the inner diameter by a predetermined length. In addition, the elastic body 18
Center axis CTwoIs the natural length along the short axis direction of the outer cylinder 12.
It is shorter than the inner diameter by a predetermined length. This allows
In the assembled state in which the elastic body 18 is pressed into the cylindrical portion 42,
The pair of press-contact portions 26 of the body 18 is a long axis of the inner peripheral surface of the cylindrical portion 42.
The elastic body 18 is elastically deformed.
In the restoring state, the extended end of the stopper 28 is
2 away from the inner peripheral surface.
【００３８】また本実施形態でも、側板部２２，２４の
曲面部３２Ｃに沿った部分は筒部４２の内周面より軸心
Ｓ側へ延出している。このとき、軸心Ｓに対する径方向
における側板部２２，２４の外筒１２の内周面からの延
出長Ｌ（図３参照）は、第１の実施形態と同様に１〜５
ｍｍとされている。Also in this embodiment, the portions of the side plates 22 and 24 along the curved surface 32C extend from the inner peripheral surface of the cylindrical portion 42 to the axis S side. At this time, the extension length L (see FIG. 3) of the side plates 22, 24 from the inner peripheral surface of the outer cylinder 12 in the radial direction with respect to the axis S is 1 to 5 as in the first embodiment.
mm.
【００３９】次に、本実施形態に係る防振装置４０の作
用を説明する。Next, the operation of the vibration isolator 40 according to this embodiment will be described.
【００４０】本実施形態の防振装置４０によれば、筒部
４２の中空部４４の軸直角断面形状が略楕円形状とさ
れ、かつ弾性体１８が中空部４４の内周面における長軸
方向両端部にそれぞれ圧接する一対の圧接部２６を有す
ることにより、第１の防振装置１０による作用に加え
て、筒部４２の中空部４４内へ圧入された弾性体１８
に、軸心Ｓ回りの回転方向の外力が作用した場合でも、
弾性体１８の圧接部２６が外筒１２の内周面に沿って移
動するには、弾性体１８が内径が狭くなる内周面に沿っ
て弾性変形する必要があるので、圧接部２６には弾性体
１８の変形抵抗に応じた抵抗力が作用し、この抵抗力に
より弾性体１８の外筒１２の中空部４４内での回転を防
止できる。従って、本実施形態の防振装置４０によれ
ば、筒部４２内に圧入された弾性体１８の軸方向及び回
転方向への移動を防止できる。According to the vibration isolator 40 of the present embodiment, the cross-section perpendicular to the axis of the hollow portion 44 of the cylindrical portion 42 has a substantially elliptical shape, and the elastic body 18 extends in the long axis direction on the inner peripheral surface of the hollow portion 44. By having a pair of press-contact portions 26 that press-contact each other at both ends, in addition to the operation of the first vibration isolator 10, the elastic body 18 press-fit into the hollow portion 44 of the cylindrical portion 42.
Even when an external force in the direction of rotation about the axis S is applied,
In order for the pressure contact portion 26 of the elastic body 18 to move along the inner peripheral surface of the outer cylinder 12, the elastic body 18 needs to be elastically deformed along the inner peripheral surface where the inner diameter becomes smaller. A resistance force corresponding to the deformation resistance of the elastic body 18 acts, and this resistance can prevent the rotation of the elastic body 18 in the hollow portion 44 of the outer cylinder 12. Therefore, according to the vibration isolator 40 of the present embodiment, it is possible to prevent the elastic body 18 press-fit into the cylindrical portion 42 from moving in the axial direction and the rotational direction.
【００４１】（第３の実施形態）図５及び図６には、本
発明の第３の実施形態に係る防振装置が示されている。
なお、図１及び図２に基づいて説明した第１の実施形態
に係る防振装置１０と同一部材には同一符号を付し、重
複した説明を省略する。(Third Embodiment) FIGS. 5 and 6 show a vibration isolator according to a third embodiment of the present invention.
The same members as those of the vibration isolator 10 according to the first embodiment described with reference to FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description will be omitted.
【００４２】本実施形態の防振装置５０では、筒部１２
の内周面に径方向内側へ突出する凸状の回転拘束部５２
が設けられている。回転拘束部５２は、図６に示される
ように軸方向Ｓに沿って延在している。ここで、筒部１
２の内周面には、合計で４個の回転拘束部５２が設けら
れており、これらの回転拘束部５２のうちの２個（一
対）が弾性体１８の一方の圧接部２６に対応するように
配置され、残りの２個（一対）が他方の圧接部２６に対
応するように配置されている。そして弾性体１８が筒部
１２内へ圧入された状態で、一対の圧接部２６はそれぞ
圧接部２６の突出部２６Ａの筒部１２の内周面に沿った
両端部へ接する。In the vibration isolator 50 of the present embodiment, the cylindrical portion 12
Convex rotation restricting portion 52 protruding radially inward on the inner peripheral surface of
Is provided. The rotation restricting portion 52 extends along the axial direction S as shown in FIG. Here, the cylinder 1
A total of four rotation restricting portions 52 are provided on the inner peripheral surface of 2, and two (a pair) of these rotation restricting portions 52 correspond to one pressure contact portion 26 of the elastic body 18. And the other two (a pair) are arranged so as to correspond to the other pressure contact portion 26. Then, in a state where the elastic body 18 is pressed into the cylindrical portion 12, each of the pair of press contact portions 26 comes into contact with both ends of the protrusion 26 </ b> A of the press contact portion 26 along the inner peripheral surface of the cylindrical portion 12.
【００４３】本実施形態では、上記のような回転拘束部
５２を筒部１２を塑性変形することにより、例えば、筒
部１２を形成した金属板を外周面側からプレス機等によ
り加圧し、金属板に軸方向Ｓと平行な直線に沿った溝状
の凹みを形成することにより形成している。また、この
ような塑性加工によらず、筒部１２とは別体の棒状部材
を筒部１２の内周面へ固着することより、回転拘束部５
２を設けるようにしてもよい。In the present embodiment, the above-described rotation restricting portion 52 is formed by plastically deforming the cylindrical portion 12 so that, for example, the metal plate on which the cylindrical portion 12 is formed is pressed from the outer peripheral surface side by a press machine or the like. It is formed by forming a groove-like recess along a straight line parallel to the axial direction S in the plate. In addition, instead of such a plastic working, a rod-shaped member separate from the cylindrical portion 12 is fixed to the inner peripheral surface of the cylindrical portion 12, so that the rotation restricting portion 5 is fixed.
2 may be provided.
【００４４】次に、本実施形態に係る防振装置５０の作
用を説明する。Next, the operation of the vibration isolator 50 according to this embodiment will be described.
【００４５】本実施形態の防振装置５０によれば、筒部
１２の内周面に径方向内側へ突出すると共に弾性体１８
の圧接部２６の筒部１２内周面に沿った端部にそれぞれ
接して圧接部２６の筒部１２の内周面に沿った移動を拘
束する回転拘束部５２が設けられたことにより、第１の
防振装置１０による作用に加えて、筒部１２の中空部１
４内へ圧入された弾性体１８に、軸心Ｓ回りの回転方向
の外力が作用した場合でも、弾性体１８の圧接部２６が
筒部１２の内周面に沿って移動するには、弾性体１８が
回転拘束部５２に沿って弾性変形する必要があるので、
圧接部２６には弾性体１８の変形抵抗に応じた抵抗力が
作用し、この抵抗力により弾性体１８の筒部１２の中空
部４内での回転を防止できる。According to the vibration isolator 50 of the present embodiment, the elastic member 18 protrudes radially inward from the inner peripheral surface of the cylindrical portion 12.
The rotation restricting portions 52 that contact the ends of the press contact portion 26 along the inner peripheral surface of the cylindrical portion 12 to restrict the movement of the press contact portion 26 along the inner peripheral surface of the cylindrical portion 12 are provided. In addition to the operation of the vibration isolator 10 of FIG.
Even when an external force in the direction of rotation about the axis S is applied to the elastic body 18 pressed into the inside of the cylinder 4, the pressing portion 26 of the elastic body 18 moves along the inner peripheral surface of the cylindrical portion 12. Since the body 18 needs to be elastically deformed along the rotation restraining portion 52,
A resistance force corresponding to the deformation resistance of the elastic body 18 acts on the press contact portion 26, and the rotation of the elastic body 18 in the hollow portion 4 of the cylindrical portion 12 can be prevented by the resistance force.
【００４６】なお、以上説明した本発明の実施形態１〜
３では、筒部１２，４２の端面形状が円形状又は楕円形
状である場合のみを説明したが、外筒の端面形状は円形
又は楕円形に限定する必要はなく、例えば方形状、長円
状等であってもよい。It should be noted that Embodiments 1 to 1 of the present invention described above are used.
In FIG. 3, only the case where the end faces of the cylindrical portions 12 and 42 are circular or elliptical is described. However, the end face of the outer cylinder need not be limited to a circle or an ellipse. And so on.
【００４７】[0047]
【発明の効果】以上のように説明したように本発明の防
振装置によれば、ブラケット筒部の中空部に圧入された
弾性体のブラケット筒部からの脱落が確実に防止される
と共に、装置の効率的な生産及びコストの抑制が可能に
なる。As described above, according to the vibration damping device of the present invention, the elastic body press-fitted into the hollow portion of the bracket tube portion is reliably prevented from falling off from the bracket tube portion. Efficient production of the device and cost reduction can be achieved.
【図１】本発明の第１の実施形態に係る防振装置を示す
側面図である。FIG. 1 is a side view showing a vibration isolator according to a first embodiment of the present invention.
【図２】本発明の第１の実施形態に係る防振装置を示す
分解斜視図である。FIG. 2 is an exploded perspective view showing the vibration isolator according to the first embodiment of the present invention.
【図３】本発明の第２の実施形態に係る防振装置を示す
側面図である。FIG. 3 is a side view showing a vibration isolator according to a second embodiment of the present invention.
【図４】本発明の第２の実施形態に係る防振装置を示す
分解斜視図である。FIG. 4 is an exploded perspective view showing a vibration isolator according to a second embodiment of the present invention.
【図５】本発明の第３の実施形態に係る防振装置を示す
側面図である。FIG. 5 is a side view showing a vibration isolator according to a third embodiment of the present invention.
【図６】本発明の第３の実施形態に係る防振装置を示す
分解斜視図である。FIG. 6 is an exploded perspective view showing a vibration isolator according to a third embodiment of the present invention.
１０ 防振装置 １２ 筒部（ブラケット筒部） １４ 中空部 １６ 内筒 １８ 弾性体 ２０ ブラケット金具 ２２，２４ 側板部 ２６ 圧接部 ４０ 防振装置 ４２ 筒部（ブラケット筒部） ４４ 中空部 ５０ 防振装置 ５２ 回転拘束部 DESCRIPTION OF SYMBOLS 10 Vibration isolator 12 Tube part (bracket cylinder part) 14 Hollow part 16 Inner cylinder 18 Elastic body 20 Bracket fitting 22 and 24 Side plate part 26 Pressure contact part 40 Vibration isolator 42 Tube part (bracket cylinder part) 44 Hollow part 50 Vibration isolation Device 52 Rotation restraint
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松田 尚久 神奈川県横浜市戸塚区柏尾町150−７ Ｆターム(参考） 3D035 CA05 3J059 AD05 AE01 AE05 BA42 BB01 BD01 BD07 BD09 CA08 CB16 DA14 GA02 GA09 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Naohisa Matsuda 150-7 F-term (reference) 3D035 CA05 3J059 AD05 AE01 AE05 BA42 BB01 BD01 BD07 BD09 CA08 CB16 DA14 GA02 GA09
Claims (3)
れる内筒と、 前記内筒の外周面に固着された弾性体と、 内周側に形成された中空部内に前記弾性体が非接着で圧
入され、該弾性体を介して中空部内に前記内筒を支持す
るブラケット筒部と、 振動発生部及び振動受部の他方に連結されると共に前記
ブラケット筒部へ固定されるブラケット金具とを有する
防振装置であって、 前記ブラケット金具は、互いに対向するように支持され
て前記ブラケット筒部の軸方向両端面を挟持する一対の
側板部を有し、 前記側板部は、少なくとも前記弾性体の外周面両端部に
沿った一部がブラケット筒部内周面より軸心側へ延出し
て弾性体の軸方向側面と対向するように形成されたこと
を特徴とする防振装置。1. An inner cylinder connected to one of a vibration generator and a vibration receiver, an elastic body fixed to an outer peripheral surface of the inner cylinder, and an elastic body in a hollow portion formed on an inner peripheral side. A bracket tube that is press-fitted non-adhesively and supports the inner tube in the hollow portion through the elastic body, and a bracket that is connected to the other of the vibration generating unit and the vibration receiving unit and is fixed to the bracket tube unit Wherein the bracket fitting has a pair of side plate portions that are supported so as to face each other and sandwich both end surfaces in the axial direction of the bracket tube portion, and the side plate portion is at least the side plate portion. A vibration isolator characterized in that a part of the elastic body along both ends of the outer peripheral surface extends toward the axial center side from the inner peripheral surface of the bracket tube part and faces the axial side surface of the elastic body.
状が略楕円形状とされた中空部を有し、かつ前記弾性体
は、前記中空部の内周面における長軸方向両端部にそれ
ぞれ圧接する一対の圧接部を有することを特徴とする請
求項１記載の防振装置。2. The bracket tubular portion has a hollow portion having a substantially elliptical cross-section perpendicular to the axis, and the elastic members are respectively provided at both ends in the major axis direction on the inner peripheral surface of the hollow portion. The vibration isolator according to claim 1, further comprising a pair of press-contact portions that press against each other.
心に対して放射状に延出し前記ブラケット筒部の内周面
に圧接する一対の圧接部が形成され、かつ前記中空部の
内周面には、径方向内側へ突出すると共に一対の前記圧
接部のブラケット筒部内周面に沿った端部にそれぞれ接
して圧接部のブラケット筒部内周面に沿った移動を拘束
する凸状の回転拘束部が設けられたことを特徴とする請
求項１記載の防振装置。3. The elastic body has a pair of press-contact portions that extend radially from the axis of the inner cylinder and press against the inner peripheral surface of the bracket cylinder, respectively. The peripheral surface has a convex shape that protrudes radially inward and contacts the ends of the pair of press contact portions along the inner peripheral surface of the bracket tube portion to restrain movement of the press contact portion along the inner peripheral surface of the bracket tube portion. The vibration isolator according to claim 1, further comprising a rotation restricting portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37427498A JP3693834B2 (en) | 1998-12-28 | 1998-12-28 | Vibration isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37427498A JP3693834B2 (en) | 1998-12-28 | 1998-12-28 | Vibration isolator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000193004A true JP2000193004A (en) | 2000-07-14 |
| JP3693834B2 JP3693834B2 (en) | 2005-09-14 |
Family
ID=18503565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP37427498A Expired - Fee Related JP3693834B2 (en) | 1998-12-28 | 1998-12-28 | Vibration isolator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3693834B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003056643A (en) * | 2001-08-22 | 2003-02-26 | Nok Corp | Vibration isolating support device |
| JP2006070925A (en) * | 2004-08-31 | 2006-03-16 | Nok Corp | Cylindrical mount |
| WO2006090720A1 (en) | 2005-02-24 | 2006-08-31 | Bridgestone Corporation | Vibration isolating device |
| JP2008128411A (en) * | 2006-11-23 | 2008-06-05 | Tokai Rubber Ind Ltd | Strut arm bush and double joint type suspension using the same |
| JP2009063044A (en) * | 2007-09-05 | 2009-03-26 | Kurashiki Kako Co Ltd | Cylindrical member for vibration isolation device, and vibration isolation device |
| JP2017219103A (en) * | 2016-06-07 | 2017-12-14 | Nok株式会社 | Vibration absorbing bush |
| DE10223517B4 (en) | 2001-06-08 | 2018-06-14 | Scania Cv Ab | Suspension for a drive unit of a motor vehicle |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5815602B2 (en) | 2013-06-17 | 2015-11-17 | 住友理工株式会社 | Anti-vibration support structure for engine mount and power unit |
| JP5753225B2 (en) | 2013-06-17 | 2015-07-22 | 住友理工株式会社 | Vibration isolator |
| US9523464B2 (en) | 2014-03-05 | 2016-12-20 | Tri Technical Center Usa, Inc. | Cylindrical vibration-damping device equipped with outer bracket and outer bracket therefor |
-
1998
- 1998-12-28 JP JP37427498A patent/JP3693834B2/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10223517B4 (en) | 2001-06-08 | 2018-06-14 | Scania Cv Ab | Suspension for a drive unit of a motor vehicle |
| JP2003056643A (en) * | 2001-08-22 | 2003-02-26 | Nok Corp | Vibration isolating support device |
| JP2006070925A (en) * | 2004-08-31 | 2006-03-16 | Nok Corp | Cylindrical mount |
| WO2006090720A1 (en) | 2005-02-24 | 2006-08-31 | Bridgestone Corporation | Vibration isolating device |
| JP2006234046A (en) * | 2005-02-24 | 2006-09-07 | Bridgestone Corp | Vibration isolator |
| EP1852631A1 (en) * | 2005-02-24 | 2007-11-07 | Bridgestone Corporation | Vibration isolating device |
| EP1852631A4 (en) * | 2005-02-24 | 2009-10-28 | Bridgestone Corp | Vibration isolating device |
| JP2008128411A (en) * | 2006-11-23 | 2008-06-05 | Tokai Rubber Ind Ltd | Strut arm bush and double joint type suspension using the same |
| JP2009063044A (en) * | 2007-09-05 | 2009-03-26 | Kurashiki Kako Co Ltd | Cylindrical member for vibration isolation device, and vibration isolation device |
| JP2017219103A (en) * | 2016-06-07 | 2017-12-14 | Nok株式会社 | Vibration absorbing bush |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3693834B2 (en) | 2005-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2006090720A1 (en) | Vibration isolating device | |
| JPH10267084A (en) | Vibration proof device | |
| US5718407A (en) | Power unit mounting system | |
| EP2532918B1 (en) | Vibration-damping device | |
| JP2002295560A (en) | Cylindrical rubber mount | |
| JPH0932875A (en) | Cylindrical vibrationproofing support body | |
| JP2000193004A (en) | Vibration isolator | |
| US20030218284A1 (en) | Dynamic damper | |
| JPH1182626A (en) | Device for flexibly connecting at least two component parts | |
| JP2000193003A (en) | Engine roll mount for automobile | |
| JP4903023B2 (en) | Vibration isolator | |
| JPH11257397A (en) | Vibration isolating device | |
| JPH11270606A (en) | Connection structure | |
| US20080164114A1 (en) | Vibration Isolating Device | |
| JP2001165219A (en) | Vibration control bush and vibration control bush assembly | |
| JPH09196077A (en) | Shaft coupling and manufacture thereof | |
| JPH08270698A (en) | Vibration insulation bush | |
| JPH11325147A (en) | Cylindrical vibration isolating device, and its manufacture | |
| JPH0743494Y2 (en) | Elastic shaft coupling | |
| JP2002089601A (en) | Bush device | |
| WO2002042661A1 (en) | Connecting rod | |
| JP2001248671A (en) | Bush | |
| JPH1053035A (en) | Center bearing support | |
| JPH0560147A (en) | Flexible coupling | |
| JPH10339342A (en) | Vibration isolating device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20041026 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20041116 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20050117 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20050621 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20050622 |
|
| R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080701 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090701 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090701 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100701 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110701 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110701 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120701 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120701 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130701 Year of fee payment: 8 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |