DRIVE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a drive device capable of suppressing transmission of axial vibration of a sun gear in a planetary gear mechanism.SOLUTION: This drive device 1 comprises: a planetary gear mechanism 7 including a sun gear 7s with a coupling portion 7a formed to protrude from an end surface of the sun gear 7s on one side in an axis L1 direction; a first motor 3 including a rotary shaft 3a coupled to the coupling portion 7a; and a case 15 accommodating the first motor 3 and the planetary gear mechanism 7. The case 15 includes a partition wall part 15a arranged between the first motor 3 and the planetary gear mechanism 7. A stepped side surface 7k directed toward the partition wall part 15a side is formed on an outer peripheral surface of the coupling portion 7a, and a first bearing 7b interposes between the stepped side surface 7k and a surface of the partition wall part 15a on the sun gear 7s side.