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:
Apr. 12, 2011
Filed:
Jan. 04, 2007
Takehiko Hakui, Wako, JP;
Hajime Hirata, Wako, JP;
Hajime Kajiwara, Wako, JP;
Kiyoshi Nakajima, Wako, JP;
Yoshimitsu Akuta, Wako, JP;
Kunimichi Hatano, Wako, JP;
Takehiko Hakui, Wako, JP;
Hajime Hirata, Wako, JP;
Hajime Kajiwara, Wako, JP;
Kiyoshi Nakajima, Wako, JP;
Yoshimitsu Akuta, Wako, JP;
Kunimichi Hatano, Wako, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A first rotor () and a second rotor () are arranged in a coaxial and mutually rotatable relationship and are provided with a first driven gear () and a second driven gear (), respectively. A drive shaft () is also provided with a first drive gear () and a second drive gear () which are commonly connected to an output shaft of an electric motor (), and mesh with the first and second driven gears, respectively, at slightly different gear ratios. The first and second rotors are connected via a thread feed mechanism () that converts a relative rotation between the first and second rotors into an axial linear movement between the first and second rotors that is used for changing a distance between a vehicle body part and a corresponding end of a suspension spring in a vehicle height adjusting system (). Owing to a differential rotation of a high gear ratio between the first and second rotors, a significant torque amplification is possible with a compact arrangement. The use of spur gears instead of a worm gear mechanism minimizes torque loss.