Patent ID: 8678784

Claim:
A drive device in which a driving force transfer mechanism is accommodated in a case that includes a main body portion having an opening portion and a cover portion attached to the opening portion configured so as to entirely cover and close the opening portion, and the cover portion is provided with an oil pump, the drive device comprising: a pump cover attached to an inner surface of the cover portion, which forms an inner surface of the case, such that the pump cover is accommodated in an internal space surrounded by the main body portion and the cover portion, wherein a pump chamber of the oil pump is formed by a recess that is formed in at least one of a mating surface of the cover portion and a mating surface of the pump cover in a bonding portion between the cover portion and the pump cover; a hollow cylindrical rotating shaft that forms the driving force transfer mechanism configured to be supported by the pump cover via a bearing; an oil pump drive shaft configured to drive the oil pump, the oil pump drive shaft being oriented coaxial and radially inward of the rotating shaft and configured to rotate relative to the rotating shaft; an axial oil passage, formed radially inward of the rotating shaft and radially outward of the oil pump drive shaft; a relay oil passage through which oil for either lubricating or cooling the drive force transfer mechanism or oil for both lubricating and cooling the drive force transfer mechanism flows, is formed by a recess provided in at least one of the matching surface of the cover portion and the matching surface of the pump cover; and a communication hole configured to communicate between the relay oil passage and the axial oil passage, the communication hole being provided in the pump cover, and oil supplied to the relay oil passage is supplied to the bearing and the axial oil passage via the communication hole.