公开(公告)号：US20180156313A1

公开(公告)日：2018-06-07

申请号：US15572664

申请日：2015-05-29

Applicant: Harmonic Drive Systems Inc.

Inventor： Norio SHIROKOSHI ,  Yasushi ONO

IPC: F16H1/28

Abstract: In a planetary gear device series composed of eight kinds of planetary gear devices with gear reduction ratios of 3 to 10, the planetary gear device of each gear reduction ratio uses an internal gear with 108 teeth or a slightly different number of teeth, and the module is common among the planetary gear devices of all gear reduction ratios. The combinations of the sun gear teeth number Za and the internal gear teeth number Zc in the planetary gear device of each reduction ratio are given in Table 1 of this application.