公开(公告)号：US20200032891A1

公开(公告)日：2020-01-30

申请号：US16477306

申请日：2017-11-29

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Masaru KOBAYASHI ,  Akira MARUYAMA

IPC: F16H49/00

Abstract: In a strain wave gearing, a flexible externally toothed gear flexed by a wave generator meshes with a flexible internally toothed gear while in an overlapping meshing state. A floating ring, which supports the internally toothed gear from the outer circumferential side, maintains the overlapping state of the meshing and supports the internally toothed gear in a floating state that allows displacement following a state of radial flexion in the tooth trace direction of the internal teeth of the internally toothed gear. Differences between the meshing states of both gears can be alleviated at each position in the tooth trace direction. Degradation in the transmission characteristics and the strength characteristics of the strain wave gearing caused by manufacturing dimensional accuracy of each component and assembly accuracy can be suppressed.