Jtekt Corporation

Tomoki Yoshihama

Makoto Nishiji

He Jin

Kenji Asami

Songjie Li

A vehicle differential device includes a plurality of pinion gear sets. Each of the pinion gear sets includes a first pinion gear configured to mesh with a first outer helical gear and a plurality of second pinion gears configured to mesh with a second outer helical gear. The first pinion gear integrally includes an axially one end side gear portion configured to mesh with the first outer helical gear and an axially other end side gear portion configured to mesh with the second pinion gears. The second pinion gears are configured to mesh with the second outer helical gear at positions separated from each other in a circumferential direction of the second outer helical gear, and the axially other end side gear portion of the first pinion gear is configured to mesh with the second pinion gears at positions radially outward of the second outer helical gear.

Vehicle differential device

A differential device includes: first and second side gears disposed side by side in the rotational axis direction; a pinion gear set in which two second pinion gears are meshed with a first pinion gear; and a housing that holds the pinion gear set. The first pinion gear has an axially one end-side gear portion meshed with the first side gear, and an axially other end-side gear portion meshed with the two second pinion gears. The axially one end-side gear portion and the axially other end-side gear portion are integral with each other. The two second pinion gears are meshed with the second side gear at positions away from each other in the circumferential direction of the second side gear. The axially other end-side gear portion of the first pinion gear is meshed with the two second pinion gears at positions on the radially outer side of the second side gear.

Differential device

A vehicle differential apparatus is provided with: a differential case rotatable around a rotation axis in which a first shaft insertion hole is formed along a direction perpendicular to the rotation axis, a pair of side gears, a pinion gear meshing with the paired side gears in which a second shaft insertion hole is formed in an axial center portion of the pinion gear, and a pinion shaft including an insertion end portion inserted in the first shaft insertion hole of the differential case and a pinion gear support portion inserted in the second shaft insertion hole of the pinion gear to rotatably support the pinion gear. The pinion gear is supported so as to be movable in the rotation axis direction by a meshing reaction force generated from a meshing engagement with the pair of side gears.

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Kariya, Japan

Tomoki Yoshihama