PLANETARY GEAR DEVICE

摘要

In a planetary gear device (1) provided with a sun gear (5), a planet gear (7), a ring gear (9), and a tubular support member (27) which is linked to the ring gear (9) and which supports the ring gear, an outward flange (51) protruding diametrally outward is disposed on the ring gear (9), a corrugated inward flange (53) having a plurality of projections (53a) protruding diametrally inward is disposed on the tubular support member (27), the ring gear (9) and the tubular support member (27) are linked by the outward flange (51) and the inward flange (53) being fastened by a bolt (65) and nut (61), and shallow first recesses (58A) and second recesses (58B) deeper than the first recesses are formed in the inward flange so that the depth of recesses (58) between the projections cyclically becomes greater.