PLANETARY DIFFERENTIAL TYPE MOTION CONVERTING MECHANISM

PROBLEM TO BE SOLVED: To provide a planetary differential type motion converting mechanism capable of restraining partial abrasion or chipping on tooth surfaces of a screw or a gear formed on a planetary shaft and a screw or a gear meshed with the screw or the gear due to tilt of the planetary shaft. SOLUTION: In the planetary differential type motion converting mechanism 100, a plurality of the planetary shafts 30 are interposed between a cylindrical rotor 10 and a sun shaft 20 internally inserted into the rotor 10, and rotation movement of the rotor 10 is converted to linear movement of the sun shaft 20 with the usage of difference of a lead angle of the screw provided on the respective members. The planetary differential type motion converting mechanism 100 is provided with a supporting member 51 abutting on the portion of an intermediate part 35 of the planetary shaft 30 near a front side planetary gear 32a from the rotor 10 side and regulating displacement of the front side planetary gear 32a to be adjacent to the rotor 10. COPYRIGHT: (C)2010,JPO&INPIT