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:
Aug. 06, 2002
Filed:
Jun. 23, 2000
Tadao Kodaira, Maebashi, JP;
Mitsuba Corporation, Gunma, JP;
Abstract
An electric power steering unit comprises a housing (A) for containing a rack-shaft and holding therein a coupling section of the rack-shaft to a pinion of a steering column and an electric motor equipped with a yoke ( ) arranged inside the housing (A) and integrally formed therewith, and a ball screw mechanism ( ) contained in a housing (B) for transmitting the rotating force of the motor to the rack-shaft as the steering assisting power. A female threaded portion ( ) is formed at the end portion of yoke ( ) on the housing (B) side. The female threaded portion ( ) is fitted to a male threaded portion ( ) formed on the end portion of housing (A) on the housing (B) side to couple the housing (A) to the housing (B). As a result, wear and adhesion are prevented as well as wall thickness is reduced with the coupling strength of the housings maintained in the electric power steering unit with a configuration in which the housings are coupled with screws.