| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotary actuator having improved gear efficiency by reducing inclination of a sun gear. <P>SOLUTION: When a rotor axis rotates, a sun gear 50 rotates centering on an eccentric portion 45 while performing an orbital motion inside a ring gear 70 in a contact state. The rotation of the sun gear 50 is transmitted to an output shaft 60 as a projected portion 55 provided in a disk portion is in contact with a fitting hole 65 of the output shaft 60 in the rotation direction. In particular, in the axial direction, the center position (position shown by a symbol c) of a middle bearing 53 that supports the sun gear 50 is included in an overlap region of the outer teeth 54 of the sun gear 50 and the inner teeth 73 of the ring gear 70 (shown by a symbol a) and an overlap region of the projected portion 55 of the sun gear 50 and the fitting hole 65 of the output shaft 60 (shown by a symbol b). <P>COPYRIGHT: (C)2012,JPO&INPIT |
