| 摘要 |
PROBLEM TO BE SOLVED: To miniaturize a hub reduction gear and to simplify a structure thereof by changing a part of the structure of the hub reduction gear. SOLUTION: A driving device 1 of a vehicle having an output shaft 5 and a driving wheel 4 comprises a sun gear 5a provided on an outer circumferential part of the output shaft 5, a plurality of pinion gears 10 spline-engaged with the sun gear 5a, an annular ring gear 40 spline-engaged with the plurality of pinion gears 10, a carrier 30 which supports the plurality of pinion gear 10 while the driving wheel 4 is fixed to the outer circumferential part thereof, and a pinion bearing 20 to support the pinion gear 10 by the carrier 30 in a relatively rotational manner. The pinion bearing 20 is arranged on the side in the axial direction of the pinion gear 10. The pinion bearing 20 is arranged only in one side of the axial direction of the pinion gear 10, and the pinion bearing 20 is arranged on the side opposite to the output shaft 5 with respect to the sun gear 5a. COPYRIGHT: (C)2006,JPO&NCIPI
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