HARMONIC GEAR DEVICE, ACTUATOR AND COVER BODY

WIPO Patent Application WO/2021/218308

A1

A harmonic gear device (1). The harmonic gear device (1) causes a flexible external gear (3) to deform along with the rotation of a wave generator (4) centred about a rotation axis (Ax1), so as to make some of external teeth (31) mesh with some of internal teeth (21), thereby causing the flexible external gear (3) to carry out relative rotation relative to a rigid internal gear (2) according to the difference in the number of teeth between the flexible external gear (3) and the rigid internal gear (2). The wave generator (4) is provided with: a non-circular cam (41) driven to rotate about the rotation axis (Ax1); and a bearing (42), which is arranged between an outer peripheral surface (411) of the cam (41) and an inner peripheral surface (301) of the flexible external gear (3). The harmonic gear device (1) further comprises a cover member (5), wherein the cover member (5) is configured so as to be opposite the bearing (42) from one side of the rotation axis (Ax1). The cover member (5) is opposite the bearing (42) in such a way that it is ensured that there is a gap (G1) between the cover member and an outer ring (421) of the bearing (42), so as to prevent foreign matter (X1) from entering the inner side of the outer ring (421) from one side of the rotation axis (Ax1).

MINEGISHI KIYOJI (JP)
LIN WENJIE (JP)
WANG GANG (JP)
GUO ZIMING (JP)

PCT/CN2021/077116

November 04, 2021

February 20, 2021

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SMART IP INFORMATION SERVICE SHENZHEN LTD (CN)

F16H57/08; F16H3/70

CN107228180A	2017-10-03
CN111022618A	2020-04-17
US20070157760A1	2007-07-12
KR101280291B1	2013-07-01
JPS6095235A	1985-05-28

CHINA PAT INTELLECTUAL PROPERTY OFFICE (CN)

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