To improve spring characteristics so that an engine-side connection member and an elastic member can produce sufficient cushioning effect according to rolling movement of an engine, as movement (displacement) of the engine-side connection member and the elastic member occurring in vibration of an internal combustion engine such as an engine of a vehicle is not simple movement in a vehicle longitudinal direction, but rotating (rolling) movement about a shaft extended in a lateral (width) direction of the vehicle.SOLUTION: A vibration isolator includes a vibration isolator body 14, and a bracket portion 15 connecting the vibration isolator body 14 and a vibration generation portion, and further includes a stopper portion 18 disposed at an outer side in a vehicle longitudinal direction, of the bracket portion 15 and composed of an elastic body for restricting displacement in the vehicle longitudinal direction, of the bracket portion 15. A side surface in the vehicle longitudinal direction, of the bracket portion 15 has inclination to a vehicle vertical direction, changed on the way, and an inclination angle to the vehicle vertical direction is larger at the upper side in the vehicle vertical direction with respect to that at the lower side.SELECTED DRAWING: Figure 1
【課題】車両のエンジン等の内燃機関の振動時に生じる機関側連結部材と弾性部材の移動(変位)は、単純な車両前後方向の動きではなく、車両の左右(幅)方向に延在する軸の回りに回動(ロール)する動きとなるため、エンジンがロールする動きに合わせて、機関側連結部材と弾性部材が十分なクッション効果を生じさせることができるように、バネ特性を向上させることが望ましいことが分かった。【解決手段】防振装置本体14と、防振装置本体14と振動発生部とを連結するブラケット部15とを備え、ブラケット部15の車両前後方向への変位を規制する、ブラケット部15の車両前後方向外側に配置された、弾性体からなるストッパ部18を備え、ブラケット部15の車両前後方向の側面は、車両上下方向に対する傾きが途中で変化し、車両上下方向に対する傾斜角度は、車両上下方向の上側が下側より大きい。【選択図】図1
VIBRATION ISOLATOR
防振装置
2020-12-24
Patent
Electronic Resource
Japanese