| 摘要 |
<p>PURPOSE: To surely achieve the stable and efficient operation by providing a complementary male bearing surface and a female bearing surface on a drive train to supply the power from an actuator motor to an output element, and operating both bearing surfaces at approximately correct positions. CONSTITUTION: A rotary annular member of an actuator, i.e., a boss 30 of a drive train gear or a pinion is combined in a journal manner so as to be freely rotatable on a cylindrical metal shaft 32. The member 30 is formed of a stock of a plastic material, and a center bore 34 to form a male bearing surface and a female bearing surface to be formed by the periphery of the shaft 32 is provided in the member 30. Since the whirling around the shaft is impossible at the point of contact or the line PP in the normal 'harmonized drive' condition, the 'racing' effect is eliminated, and no 'Hula-Hoop' or the like occurs.</p> |
