The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 17, 2024
Filed:
Jul. 27, 2020
Applicant:
Harmonic Drive Systems Inc., Tokyo, JP;
Inventor:
Toru Takeda, Azumino, JP;
Assignee:
HARMONIC DRIVE SYSTEMS INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 7/116 (2006.01); F16H 49/00 (2006.01); H02K 3/26 (2006.01); H02K 7/08 (2006.01); H02K 21/24 (2006.01);
U.S. Cl.
CPC ...
H02K 7/116 (2013.01); F16H 49/001 (2013.01); H02K 3/26 (2013.01); H02K 7/083 (2013.01); H02K 21/24 (2013.01); H02K 2203/03 (2013.01);
Abstract
A rotary actuator includes a PWB motor and a wave gear drive. The PWB motor is an axial gap motor. A motor rotor in the PWB motor includes a rotor disk coaxially affixed to a hollow motor shaft and a rotor magnet affixed to the rotor disk. A motor stator is composed of a printed wiring board, and includes an insulating substrate and a motor coil defined by printed wiring formed on the insulating substrate. Compared with a conventional rotary actuator using an SPM motor or the like, the shaft length can be shortened and the hollow diameter thereof can be increased.