| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor capable of improving productivity of a housing by suppressing high frequency sound caused by expanding/contracting vibration of a stator and high frequency sound caused by film surface vibration of the housing.SOLUTION: A housing 20 of a motor 10 comprises an inner cylinder 21 holding a stator 13, and an outer cylinder 22 provided at the outer peripheral side of the inner cylinder 21 and forming a cooling water channel 30 between the inner cylinder 21 and itself. Within the cooling water channel 30, a plurality of inner ribs 41-43 radially connecting the inner cylinder 21 and the outer cylinder 22 and extending circumferentially are provided side by side in an axial direction. The cooling water channel 30 is divided into a plurality of channels 31-34 by the plurality of inner ribs 41-43, and at positions radially overlapped with the plurality of channels 31-34 on an outer peripheral surface of the outer cylinder 22, outer ribs 45 protruding outside in a radial direction and extending circumferentially are provided, respectively. |
