Patent ID: 9366333
Filing Date: 2016-06-14
CPC Classification: F16H

Claim Text:
1. A vehicle differential gear that distributes a driving force of a drive source of a vehicle to a pair of output shafts while allowing a differential operation, the vehicle differential gear comprising: a differential case, to which the driving force is input; a plurality of pinion gears rotatably supported by the differential case; a pair of side gears meshing with the plurality of pinion gears and each coupled to a corresponding one of the pair of output shafts; a washer having a sliding surface that slides with an axial end face of at least one side gear of the pair of side gears to create a frictional force, the sliding at the sliding surface being lubricated by a lubricating oil; and a solid lubricant coating on the sliding surface to suppress a fluctuation of the frictional force, wherein the pair of side gears and the plurality of pinion gears are helical gears that generate a thrust force in an axial direction by meshing.