PROBLEM TO BE SOLVED: To provide a support structure of a rotor shaft which can secure an elastic force without being elongated in an axial direction, and can sufficiently obtain a buffer effect of a tooth hammering sound.SOLUTION: In a support structure 12 of a rotor shaft, a friction damper 10 in which an annular or cylindrical core material 44 and an elastic member 46 are fit to each other is pressure-inserted into a clearance between opposing faces of an external peripheral face 43 of a first rotating shaft 26 and an internal peripheral face 41 of the rotor shaft 22 of an electric motor 20 in a radial direction, and a rib 48 and a rib 50 which are inclined to a rotational axial direction, and fit to each other are arranged at contact faces of the core material 44 and the elastic member 46. Therefore, a force F which is imparted by the core material 44 to a vertical direction of the rib 50 of the elastic member 46 in a longitudinal direction is lowered, and the apparent torsional toughness of the elastic member 46 becomes large. By this constitution, an apparent elastic force of the elastic member 46 is increased without elongating an axial dimension, and a friction force can be secured.SELECTED DRAWING: Figure 4
【課題】軸方向に長くしなくても弾性力を確保できて歯打ち音に対する緩衝効果が十分に得られるロータ軸の支持構造を提供する。【解決手段】ロータ軸の支持構造12によれば、第1回転軸26の外周面43および電動機20のロータ軸22の内周面41の径方向の対向面間には、環状或いは円筒状の心材44と弾性部材46とが互いに嵌め着けられたフリクションダンパ10が圧入されており、心材44と弾性部材46の互いの接触面には、回転軸方向に対して傾斜し且つ相互に嵌まり合うリブ48およびリブ50をそれぞれ有している。このため、心材44が弾性部材46のリブ50の長手方向に垂直な方向に与えるFが低下させられ、弾性部材46の見かけの捩り剛性が大きくなる。これにより、軸方向寸法を長くすることなく弾性部材46の見掛けの弾性力が高められて摩擦力が確保できる。【選択図】図4
SUPPORT STRUCTURE OF ROTOR SHAFT OF ELECTRIC MOTOR FOR VEHICLE
車両用電動機のロータ軸の支持構造
2016-06-30
Patent
Electronic Resource
Japanese
IPC: | F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / F16F SPRINGS , Federn / H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES |