Patent ID: 9261183
Filing Date: 2016-02-16
CPC Classification: F16H

Claim Text:
1. A differential device comprising: a differential gear mechanism; and an integrated differential case housing the differential gear mechanism, the differential case including: first and second bearing bosses formed integrally on one side portion and another side portion of the differential case and aligned on a same axis to be rotatably supported by a transmission case; a work window for inserting the differential gear mechanism, the work window being provided in a peripheral wall of the differential case; and a pair of sleeves fitted into the first and second bearing bosses from sides of outer ends thereof, wherein oil seals are to be set between outer end portions of the sleeves which protrude from the first and second bearing bosses and the transmission case, left and right drive shafts are to be fitted and inserted into the sleeves and to be spline-fitted to a pair of left and right side gears of the differential gear mechanism which are configured to have the drive shafts spline-fitted thereto, and the sleeves are configured to be connected to the side gears or the drive shafts, wherein for each of said sleeve and the side gear corresponding thereto an outer tube portion is formed in one of the side gear and the sleeve, and an inner tube portion fitted to an inner periphery of the outer tube portion is formed in the other, the outer tube portion and the inner tube portion being fitted with each other in a separable state, a falling-off prevention device for preventing unintended separation of the outer and inner tube portions when the left and right drive shafts are inserted in the sleeves and spline-fitted to the side gears, is provided between the outer and inner tube portions, and a seal member for shutting off communication between the falling-off prevention device and an inside of the differential case and thereby preventing leakage of oil inside the differential case to an outside through the falling-off prevention device is disposed in a fitting portion between the outer and inner tube portions.