| 摘要 |
<p>PURPOSE:To reduce the weight and size of the captioned item, subsequently to decrease its cost by fixing a V-grooved ring having a V-belt wound around itself, to the outer circumference edge of the end face of a rotor rotatably interposed between a stator and an amature. CONSTITUTION:A rotor 22 of reverce-L-shape has an inner circumference ring 22C and also a plurality of windows 22a for shutting out magnetism at its end. A V-grooved ring 21 is fixed on the outer circumference end of the rotor 22 through bolts 10 inserted in depth diametrically toward the interior from the outer circumference edge 22d of the rotor 22. Consequently, as the circumference edge of the end face of the rotor 22 can be fully used, not only its is possible to reduce the diameter size of the rotor 22 but also it is not necessary to increase the engagement length of the bolt 10 and thickness of the rotor 22.</p> |
