Driving unit for driving vehicle by motor

摘要

A bearing for supporting rotation of either of a rotor and a planetary gear is supported by a wall disposed between a motor housing and a gear case room. The wall is provided with an opening allowing lubricating oil splashed by a gear to be splashed onto an upper portion of a stator. Some of the lubricating oil passes through an oil passage placed at a central portion of a shaft and through an oil passage provided at a planetary carrier, and is then splashed through the opening onto an outer periphery of a stator coil. Furthermore, the lubricating oil is also splashed by a pinion gear, and is similarly splashed through the opening onto the stator coil and an inner peripheral wall of the motor housing. Accordingly, the stator coil and the stator core are cooled.