Differential unit
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKengo OKUMOTO
Life of this patent
Estimating the term…
Abstract
A differential unit configured to reduce noise of a ring gear by preventing rotational runout of a differential case. The differential unit comprises: a ring gear formed on the differential case; side gears held in the differential case while being opposed to each other; pinion gears interposed between the side gears; and a pinion shaft rotatably supporting the pinion gears. End sections of the pinion shaft are press-fitted into through holes of the differential case, and a diameter of an overhang portion of the pinion shaft located outside of the through hole is larger than an inner diameter of the through hole.
Claims6
A differential unit, comprising:
- a differential case in which a ring gear is formed integrally on its outer circumferential surface;
- a pair of side gears held in the differential case while being opposed to each other to rotate on a rotational center axis of the differential case;
- a pair of pinion gears interposed between the side gears while being meshed with the side gears;
- and
- a pinion shaft penetrating through the pinion gears in a direction perpendicular to the rotational center axis of the differential case so as to support the pinion gears in a rotatable manner,
- wherein both end sections of the pinion shaft are supported by the differential case,
- the differential case comprises a through hole into which the end section of the pinion shaft is inserted,
- the end section of the pinion shaft is press-fitted into the through hole of the differential case,
- the pinion shaft comprises an overhang portion located outside of the through hole of the differential case, and
- a diameter of the overhang portion is larger than an inner diameter of the through hole.
Dependencies are inferred from the claim text.