| 摘要 |
PURPOSE:To effectively secure a permanent magnet between the inner periphery of a rotor body of the permanent magnet and a pole piece by eliminating the displacement of the rotor body in the rotating direction and the rotational axial direction by engaging means. CONSTITUTION:Permanent magnets 12, 13 are engaged with a retainer 15 of a pole piece 14. Screws 19, 19 are respectively inserted into the mounting holes 18, 18 of a peripheral wall 11b, and clamped to the threaded holes of mounts 16, 16. Thus, the magnets 12, 13 are secured to the inner periphery 11c of the rotor body 11. The movements of the rotor body 11 toward the rotating direction in the magnets 12, 13 are prevented by the first and second engaging units 15c, 15d of the engaging means, and the displacements toward the rotational axial direction are prevented by the third and fourth engaging units 15f, 15g. |
