Musashi Seimitsu Industry Co., Ltd.

Tetsuro Hamada

Shinichi Murata

Yoichi Yanase

Shohei Sakata

Takanori Noguchi

Nobuto Muto

Kazunori Nonoyama

A differential device is provided in which a first wave number (Z1) of a first hypo groove part on an input plate, a second wave number (Z2) of a first epi groove part on a first differential plate and opposing the first hypo groove part, a third wave number (Z3) of a second hypo groove part on the first differential plate and on the opposite side from the first epi groove part, and a fourth wave number (Z4) of a second epi groove part on a second differential plate and opposing the second hypo groove part are set as Z1=8, Z2=Z3=6 and Z4=4, or as Z1=Z4=6, Z2=4, Z3=8. Such differential device enables equal torque distribution and equal differential rotation via a cycloid reduction mechanism without using a bevel gear or a center plate.

Differential device

A differential device includes: a differential gear mechanism; and an integrated differential case housing the mechanism, the differential case including bearing bosses formed integrally on one and other side portions thereof and aligned on a same axis to be rotatably supported by a transmission case; a work window being provided in the differential case; sleeves rotatably supported by the bosses and connected to side gears of the mechanism liquid-tightly. The sleeves can be passed through an inside of the differential case from the window and fitted and inserted to inner peripheries of the bosses, falling-off prevention devices are provided between the sleeves and the bosses, and seal devices for preventing lubricating oil in the differential case from flowing out are provided between the side gears and the sleeves. Accordingly, when drive shafts are removed from the differential device, the oil in the transmission and differential cases does not flow out.

Differential device and method of assembling the same

A differential device includes: a differential gear mechanism; and an integrated differential case housing the mechanism, the differential case including bearing bosses formed integrally on one and other side portions thereof and aligned on a same axis to be rotatably supported by a transmission case; a work window being provided in the differential case; sleeves rotatably supported by the bosses and connected to side gears of the mechanism liquid-tightly. The sleeves can be passed through an inside of the differential case from the window and fitted and inserted to inner peripheries of the bosses, sleeve retainers are provided between the sleeves and the bosses, and seal devices for preventing lubricating oil in the differential case from flowing out are provided between the side gears and the sleeves. Accordingly, when drive shafts are removed from the differential device, the oil in the transmission and differential cases does not flow out.

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Toyohashi, Japan

Tetsuro Hamada