| 摘要 |
Provided is an in-wheel motor drive device, including a casing configured to hold a motor part, a speed reduction part, and a wheel bearing part, the motor part including: a stator, which is fixed to the casing; a rotation shaft of a motor, which is rotatably supported on the casing through intermediation of rolling bearings; and a rotor, which is mounted to the rotation shaft of the motor. The rolling bearing has a radial internal clearance of from 8 µm to 25 µm before being mounted into the motor part. The rotation shaft of the motor is rotatably supported on the casing through intermediation of a plurality of rolling bearings. The rotation shaft of the motor and the rolling bearings configured to support the rotation shaft of the motor are fitted to each other by transition fit or interference fit. |
