PLANETARY DIFFERENTIAL TYPE MOTION CONVERTING MECHANISM, AND ACTUATOR EQUIPPED WITH THE PLANETARY DIFFERENTIAL TYPE MOTION CONVERTING MECHANISM

摘要

PROBLEM TO BE SOLVED: To provide a planetary differential type motion converting mechanism capable of suppressing reduction in durability of planetary shaft caused by inclination of a shaft body.;SOLUTION: The planetary differential type motion converting mechanism is formed by interposing a plurality of planetary shafts 30 between a circular rotor and a sun shaft inserted into the rotor and engaging screw parts and gear parts formed in the respective members. The planetary shaft 30, divided into a shaft body 35 including the screw part 31 and the gear part 32a and a gear member 36 including a gear part 32b, is formed to be integrated by inserting a shaft part 33 formed at the shaft body 35 into a bearing hole 34 formed at the gear member 36. An inner peripheral surface of the bearing hole 34 includes a tapered surface whose inner diameter becomes larger as it becomes farther away from a base end part of the shaft part 33.;COPYRIGHT: (C)2010,JPO&INPIT