| 摘要 |
A rotation transmission device includes inner and outer rings, a two-way clutch mounted between the outer and inner rings, and an electromagnetic clutch mounted adjacent to the two-way clutch. The electromagnetic clutch includes a rotor guide pressed onto the outer ring at its open end and a rotor pressed into the rotor guide. The rotor guide is made of a magnetic material having the same or substantially the same coefficient of linear expansion as the material of the rotor. Thus, even when the rotor guide and the rotor are heated and expanded, the interference between the rotor and the rotor guide remains substantially constant. Therefore, the rotor and the rotor guide can be reliably coupled together with a simple structure and at a low cost.
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