DIFFERENTIAL DEVICE

摘要

A differential device distributively transmitting rotational force of an input member rotatable together with a pinion support portion to paired output shafts includes: paired side gears respectively having an outer peripheral portion including a toothing portion meshing with a pinion and connected to the output shafts and a cover portion covering an outside of at least one side gear and rotating integrally with the input member, even under severe driving conditions, preventing seizure in the portions and degradation of lubricant oil is suppressed. At least one cover portion includes an oil retaining portion covering a back surface of the one side gear in a first predetermined area including an area overlapping the pinion and a lightening portion exposing the back surface in a second predetermined area without overlapping the pinion, as seen in a side view from axially outside of the output shafts.

主权项

1. A differential device which distributively transmits rotational force of an input member to a pair of mutually-independent output shafts, the input member retaining a pinion support portion that supports a pinion, and being rotatable together with the pinion support portion, the differential device comprising:
a pair of side gears each having an outer peripheral portion which includes an annular toothing portion in mesh with the pinion, and connected to the pair of output shafts, respectively; and a cover portion covering an outside of at least one side gear, and rotating integrally with the input member, wherein at least one cover portion includes
an oil retaining portion covering a back surface of the one side gear in a first predetermined area which includes an area overlapping the pinion as seen in a side view from outside in an axial direction of the output shafts, anda lightening portion exposing the back surface of the one side gear in a second predetermined area without overlapping the pinion as seen in the side view.