| 摘要 |
PROBLEM TO BE SOLVED: To provide an inner rotor which is simply constituted, and securely prevents magnets integrally arranged in the inner rotor from jumping out toward an outer diameter side, involved in rotation of the inner rotor. SOLUTION: The inner rotor is constituted including a plurality of the magnets 4, and a supporting frame 5, wherein the magnets are arranged at an outer periphery of an annular core 3 at predetermined intervals in a circumferential direction, and a rotating pivot 2 at an engine side penetrates a shaft core portion in the annular core. The supporting frame includes a plurality of supporting faces 5h, 5g which are brought into contact with a pair of circumferential side faces 4e, 4f, respectively, and support the magnets 4 so that these may be positioned in the circumferential direction, wherein the side faces are opposite to the circumferential direction of each magnet 4. The circumferential side faces 4e, 4f of each of the magnets, and the supporting faces 5h, 5g are formed on inclined faces in which a facing interval becomes narrower toward the outer diameter side, and jumping out is prevented by regulating displacement of the magnets 4 toward the outer diameter side. COPYRIGHT: (C)2008,JPO&INPIT
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