ELECTRIC POWER STEERING DEVICE AND ELECTRIC MOTOR FOR ELECTRIC POWER STEERING DEVICE

PROBLEM TO BE SOLVED: To provide an electric power steering device and an electric motor used therefor capable of reducing a tooth hitting noise between a worm and a worm wheel engaged therewith while having a configuration in which a worm shaft is integrated into the shaft of the electric motor, su...

Full description

Saved in:
Bibliographic Details
Main Authors IWASAKI YASUHIRO, OSHIMA ATSUSHI, OTA YUSUKE
Format Patent
LanguageEnglish
Published 21.01.2010
Subjects
BLASTING
ENGINEERING ELEMENTS AND UNITS
GEARING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
LIGHTING
MECHANICAL ENGINEERING
MOTOR VEHICLES
PERFORMING OPERATIONS
THERMAL INSULATION IN GENERAL
TRAILERS
TRANSPORTING
WEAPONS
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To provide an electric power steering device and an electric motor used therefor capable of reducing a tooth hitting noise between a worm and a worm wheel engaged therewith while having a configuration in which a worm shaft is integrated into the shaft of the electric motor, suppressing the increase of sound and vibration in the electric motor, and further suppressing the cogging torque and the torque ripple of the electric motor. SOLUTION: In the worm shaft 20, the worm 21 is formed integrally with the output shaft 163 of the electric motor 15. The worm shaft 20 is rotatably supported by two bearings 152 and 162 in the electric motor 15, and the tip of the worm shaft 20 on the worm side is rotatably supported by a third bearing 22a arranged in a worm storage part 22 of a speed reduction gear box 14 attaching the electric motor. Thus the worm shaft 20 is supported at three points with three bearings. COPYRIGHT: (C)2010,JPO&INPIT
Bibliography:Application Number: JP20080175115