PROBLEM TO BE SOLVED: To suppress the generation of the electrolytic corrosion of a bearing which is arranged at a rotor shaft of an electric motor, and to reduce a drag loss which is generated an electricity-carrying body.SOLUTION: A bearing electrolytic corrosion prevention device 92 comprises: a spring 108 which is arranged between an input shaft 34 and a sun gear S, and fixed to the sun gear S via a fixing member 102 at its one end; a cylindrical metal bush 110 connected to the other end of the spring 108; a third radial-direction oil passage 34b which is formed at the input shaft 34, and can supply oil between one end and the other end of the spring 108; and an annular protrusion 112 which is protrusively formed from an external peripheral face of the input shaft 34, and slidably grips the metal bush 110. The metal bush 110 is moved to a rotation axial line C1 direction until centrifugal hydraulic pressure generated by the oil and an energization force of the spring 108 are balanced with respect to each other, and when the annular protrusion 112 slides to an internal peripheral face of the metal bush 110, an electricity-carrying route from a first rotor shaft 32 up to an oil pump drive shaft 76 via the sun gear G is established.SELECTED DRAWING: Figure 3
【課題】電動機のロータ軸に設けられたベアリングの電蝕の発生を抑制するとともに、通電体で発生する引摺損失を低減する。【解決手段】軸受電蝕防止装置92は、入力軸34とサンギヤSとの間に設けられ、一端が固定部材102を介してサンギヤSに固定されたバネ108およびバネ108の他端に連結された円筒状のメタルブッシュ110と、入力軸34に設けられ、バネ108の一端と他端との間にオイルを供給可能な第3径方向油路34bと、入力軸34の外周面から突設され、メタルブッシュ110を摺動可能に狭持する環状突出部112とを備える。オイルによる遠心油圧とバネ108の付勢力が平衡するまでメタルブッシュ110が回転軸線C1方向に移動させられ、環状突出部112がメタルブッシュ110の内周面に摺動すると、第1ロータ軸32からサンギヤSを介するオイルポンプ駆動軸76への通電経路が成立する。【選択図】図3
BEARING ELECTROLYTIC CORROSION PREVENTION DEVICE OF ELECTRIC MOTOR FOR VEHICLE
車両用電動機の軸受電蝕防止装置
2017-10-12
Patent
Electronic Resource
Japanese
IPC: | F16C SHAFTS , Wellen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F16H Getriebe , GEARING / H02K Dynamoelektrische Maschinen , DYNAMO-ELECTRIC MACHINES |
ELECTROLYTIC CORROSION DETECTION DEVICE, ELECTROLYTIC CORROSION DETECTION METHOD, AND PROGRAM
European Patent Office | 2024
|European Patent Office | 2017
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