Patent ID: 7980343

Claim:
A motor power device, comprising: an electric motor having a rotor shaft; a differential gear; a reduction gear comprising a reduction gear shaft, said reduction gear shaft comprising a first oil supply passage formed therein; a transmission case forming a transmission housing chamber that houses said reduction gear and said differential gear, a wall portion of said transmission case comprising a second oil supply passage formed therein; a motor case forming an electric motor housing chamber that houses said electric motor, a wall portion of said motor case comprising a third oil supply passage formed therein; a partitioning wall that separates said electric motor housing chamber and said transmission housing chamber, said partitioning wall comprising a high-pressure oil supply passage formed therein; and an oil pump driven by said rotor shaft, said oil pump being provided in said partitioning wall; wherein oil discharged by said oil pump is supplied to said high-pressure oil supply passage, then to said first oil supply passage and then to said second oil supply passage, and wherein oil discharged by said oil pump is also supplied to said supplied to said high-pressure oil supply passage and then to said third oil supply passage.