公开(公告)号：US11959539B2

公开(公告)日：2024-04-16

申请号：US18262378

申请日：2021-11-18

Applicant: KABUSHIKI KAISHA RIKEN

Inventor： Satoru Fujita ,  Kazuo Ishizuka ,  Tomoki Shirasawa ,  Ryo Kamiyama

IPC: F16H55/08 ,  F16H49/00 ,  F16H55/06

CPC classification number: F16H55/0833 ,  F16H49/001 ,  F16H55/06

Abstract: It is included an internal gear (2), an external gear (3) having flexibility, and a wave generator (4) that forms a meshing part (P) with the internal gear (2) in the external gear (3) and moves the meshing part (P) in a circumferential direction of the internal gear (2). The wave generator (4) is configured such that the meshing part (P) is formed at three or more positions in a circumferential direction of the external gear (3). A value (DpF/ZF) obtained by dividing a working pitch diameter DpF of the external gear (3) by the number of teeth ZF is greater than a value (DpR/ZR) obtained by dividing a working pitch diameter DpR of the internal gear (2) by the number of teeth ZR.