| 摘要 |
A flat, hollow brushless servomotor ( 1 ) has a motor housing ( 2 ), housing through holes ( 22 a, 23 a) formed in a center of both end plate portions ( 22, 23 ), a rotor shaft ( 41 ) of which a portion of both ends is exposed from the through holes, a tool-mounting hole ( 43 ) that extends through a center thereof, and workpiece insertion recesses ( 24, 25 ) formed in an external surface of both end plate portions ( 22, 23 ) of the motor housing ( 2 ) by reducing the thickness thereof. A workpiece with a shape that has facing portions facing each other across a narrow space can be introduced from an outside to a center of the motor ( 1 ) along the workpiece insertion recesses, and the facing portions of the workpiece can be machined by a tool mounted in the center of the motor.
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