ELECTRIC POWER STEERING DEVICE

摘要

PROBLEM TO BE SOLVED: To protect a screw groove of a rack shaft and a ball screw device from external environment in an electric power steering device. SOLUTION: In the electric power steering device 10, a ball screw device 50 is installed between an engagement region of a pinion 15 and a mounting region for an electric motor 30 in the axial direction along the rack shaft 16 in a housing 11.