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:
May. 21, 2019
Filed:
Jul. 03, 2015
Harmonic Drive Systems Inc., Shinagawa-ku, Tokyo, JP;
Yoshihide Kiyosawa, Azumino, JP;
Jun Handa, Azumino, JP;
Noboru Takizawa, Azumino, JP;
XinYue Zhang, Azumino, JP;
Harmonic Drive Systems Inc., Shinagawa-ku, Tokyo, JP;
Abstract
An externally toothed gear of a dual-type strain wave gearing is provided with first and second external teeth having different tooth numbers, and is flexed into an ellipsoidal shape by a wave generator. When the theoretical values of the radial flexing amounts at major-axis positions of the first and second external teeth flexed into the ellipsoidal shape are expressed by d=mnand d=mn(mand mrepresent the modules of the first and second external teeth, and nand nrepresent positive integers), the radial flexing amount of the first and second external teeth flexed by the wave generator satisfies d=(d+d)/ω(1.4≤ω≤2.6). Accordingly, a dual-type strain wave gearing can be achieved with which the first and second external teeth having different numbers can be suitably flexed to form excellent mating states with respective internally toothed gears.