Patent ID: 7789786

Claim:
A differential device provided with a pair of side gears and a pair of pinion gears housed inside a differential case, wherein the pinion gears are supported by a pinion shaft fixed to the differential case at end sections thereof in an axial direction so as to be capable of sliding freely about the pinion shaft; lubricating oil channels are provided in the pinion shaft passing through an interior of each of the end sections thereof in the axial direction, one end of each of the lubricating oil channels opening to an exterior of the differential case at a shaft-end corner section of the pinion shaft corresponding to an upstream side in a direction of rotation of the differential case, and another end thereof opening to a sliding surface of the pinion shaft with respect to one of the pinion gears; and a lubricating oil provision mechanism providing lubricating oil to the lubricating oil channels upon rotation of the differential case is provided.