| 摘要 |
PURPOSE:To mount a permanent magnet and to facilitate the work by containing a permanent magnet in a magnet case, and interposing the permanent magnet between a pole piece and a rotor body, thereby obtaining the prescribed magnetic clearance to th stator side. CONSTITUTION:A permanent magnet 5 is inserted from the hole of a magnet case 3 until contacting a pole piece 4. Then, the case 3 thus containing the magnet 5 is placed along the inner periphery 2c of the peripheral wall 2b of a rotor body 2, a screw 6 is inserted from the mounting hole 2d of the rotor body 2, and clamped into the threaded hole 3i of the case 3. In this manner, the magnet 5 can be interposed between the pole piece 4 and the peripheral wall 2b of the rotor body 2. |
