| 摘要 |
PROBLEM TO BE SOLVED: To improve a work environment and improve reutilization of a resource by engaging a claw with an inner circumferential edge of a hole arranged on a bottom part of a back yoke so as to constitute a back yoke accordingly an axial direction holding means of a rotator permanent magnet. SOLUTION: A claw 3-2 faced to a radial direction is formed on a tip end of an extending part 3-21 extending from a bottom part of a rotator hub 3 toward an inner side in an axial direction. The claw 3-2 is engaged with a bottom part hole inner circumferential edge 4-2 of a back yoke 4, an inner side of the claw 3-2 is caught to an inner circumferential edge of the back yoke 1, and thereby, they are fixed and held in both axial directions. A gradient surface is formed on an outside so as to easily slip off from the inner circumferential edge 4-2 of the back yoke 4, and its inner side is formed at a right angle for fixing and holding after engaging. For facilitating slide-insertion on an engaging process, a groove 3-4 is formed around the claw 3-2. In the case where an axial fan is manufactured, adhesive is eliminated, a work environment is improved, and reutilization of a source is improved by facilitating disassembly.
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