WHEEL DRIVING DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce noise of a wheel driving device.SOLUTION: A wheel driving device 10 rotates a hub 12 of a wheel relative to a shaft 20. The wheel driving device 10 comprises: a stator 70 which is fixed to the shaft 20; a rotor 30 which is rotated around the shaft 20 by magnetic interaction with the stator 70; and a transmission mechanism which transmits a torque, rotating the rotor 30, from the rotor 30 to the hub 12. The transmission mechanism includes: a sun gear 34 which receives the rotation of the rotor 30 to rotate around the shaft 20; a planetary gear group which is engaged with the sun gear 34; and an internal gear 38 which is fixed to the hub 12 and engaged with the planetary gear group. The wheel driving device 10 further comprises a planet support member 87 which rotatably supports planetary gears 36 included in the planetary gear group. The planet support member 87 is mounted to the shaft 20 through a one-way clutch 32.