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:
Oct. 26, 2010
Filed:
Nov. 24, 2006
Motoyasu Yamamori, Nagoya, JP;
Hidetoshi Fujiwara, Nukata-gun, JP;
Osamu Watanabe, Okazaki, JP;
Yoshinori Suzuki, Okazaki, JP;
Hirotsune Suzuki, Toyokawa, JP;
Motoyasu Yamamori, Nagoya, JP;
Hidetoshi Fujiwara, Nukata-gun, JP;
Osamu Watanabe, Okazaki, JP;
Yoshinori Suzuki, Okazaki, JP;
Hirotsune Suzuki, Toyokawa, JP;
JTEKT Corporation, Osaka-shi, JP;
Abstract
A variable transmission ratio apparatus for effectively preventing ratcheting between a flexible spline and a circular spline caused by a steering operation performing in a locked state. A variable transmission ratio apparatus includes a strain wave gear mechanism for adding rotation resulting from motor drive to rotation from an input shaft resulting from a steering operation and transmitting the added rotation to an output shaft, a housing accommodating the strain wave gear mechanism and the motor and fixed to a non-rotating portion, and a lock device for locking the housing and a motor shaft in a manner prohibiting relative rotation therebetween. Among the circular splines forming the strain wave gear mechanism, the number of teeth of the circular spline connected to the output shaft is greater than the number of teeth of the circular spline connected to the input shaft.