Planetary gear assembly, drive unit including the planetary gear assembly, and image forming apparatus including the drive unit, and installation method for planetary gear assembly

摘要

A planetary gear mechanism, comprising: a plurality of planetary gears (15); an outer gear (14) to mesh with the plurality of planetary gears (15); a sun gear (12) coaxially disposed on the same axis as the outer gear (14), to transmit force to the planetary gears (15); a carrier (16) to rotatably support the plurality of planetary gears (15), the carrier rotatably and floatingly supported and including a hole (31) through which a stick member (33) penetrates in a direction of axis of rotation of the carrier; and a stick mount (32) on which the stick member (33) penetrating through the hole (31) is mounted, the stick mount (32) disposed opposite the carrier (16), one of the outer gear (14) and the sun gear (12) being unrotatably held.