| 摘要 |
PURPOSE:To simply mount a permanent magnet along the inner peripheral surface of a rotor body by providing a holding piece for holding the end of the magnet between the inner peripheral surfaces of the peripheral wall of the body and engaging a spreader with the engaging groove of the piece. CONSTITUTION:A holding piece 5 for holding the end of a permanent magnet 4 which is disposed on the inner peripheral surface of the peripheral wall 2c of a rotor body 1 between the inner peripheral surfaces is provided. An engaging groove 7 for engaging a spreader 6 is engaged with the piece 5. Accordingly, when the spreader 6 is engaged with the groove 7, the piece 5 circumferentially expanded, and the magnet 4 is interposed between the piece 5 and the inner peripheral surface of the body 2. |
