公开(公告)号：US20240052920A1

公开(公告)日：2024-02-15

申请号：US18264942

申请日：2021-05-26

Applicant: HARMONIC DRIVE SYSTEMS INC.

Inventor： Kotaro MATSUZAWA ,  Hideki HIRABAYASHI ,  Syuhei KOBAYASHI ,  Hideki OKUHARA

IPC: F16H49/00 ,  F16C19/36

CPC classification number: F16H49/001 ,  F16C19/362 ,  F16C2361/61 ,  F16C2226/62

Abstract: A strain wave gearing includes an internally toothed gear integrated with an inner ring. A bolt hole is formed in the internally toothed gear. The bolt hole includes a bolt passage hole part, and a screw hole part extending in the direction of an axial line, continuously from the bolt passage hole part. The screw hole part, to which a bolt-fastening force is applied, is formed at a location away in the direction of the axial line from a location adjacent to a radially outer side of an internally toothed gear. Deformation, occurring during fastening of a bolt, at a portion in which the internally toothed gear is formed can be reduced, and adverse effects caused by the deformation such as a decrease in the accuracy of engagement or meshing of the internally toothed gear and an externally toothed gear can be inhibited.