| 摘要 |
PROBLEM TO BE SOLVED: To obtain a swing planetary gear device capable of easily securing an arrangement space for pipes, wiring lines, etc. in a central portion of the device for any purpose and achieving further smoothing of power transmission.SOLUTION: A swing planetary gear device 100 having a central portion of a hollow structure and including a plurality of eccentric body shafts 114A to 114C, comprises: eccentric body shaft gears 112 provided on the eccentric body shafts 114A to 114C, respectively; a transmission outer gear 110 with which the plurality of eccentric body shaft gears 112 is engaged; a drive source-side pinion arranged at a different position from a position of a rotational center axis of the transmission outer gear 110 in parallel to the transmission outer gear 110. By rotating the drive source-side pinion, the eccentric body shaft gears 112 and the transmission outer gear 110 are drive and an axial center of the drive source-side pinion is not arranged on a line connecting an axial center of the transmission outer gear 110 to an axial center of each of the eccentric body shafts 114A to 114C. |
