An invention relating to an electric power steering device is disclosed. The electric power steering device according to the present invention comprises: a ball screw part having a spiral outer groove on the outer surface; a ball part movable along the outer groove; and a ball nut part that surrounds the outer surface of the ball screw part and has a spiral inner peripheral groove through which the ball part moves, wherein the ball screw part includes an on-center part where the ball nut part is disposed on the outer surface; and an off-center part formed on both sides of the on-center part. Thus, the present invention can provide the electric power steering device capable of reducing NVH.
전동식 파워 스티어링 장치에 관한 발명이 개시된다. 본 발명에 따른 전동식 파워 스티어링 장치는: 외측면에 나선형의 외주홈을 구비하는 볼스크류부; 외주홈을 따라 이동 가능한 볼부; 및 볼스크류부의 외측면을 감싸고, 볼부가 이동되는 나선형의 내주홈을 구비하는 볼너트부를 포함하고, 볼스크류부는, 외측면에 볼너트부가 배치되는 온 센터부; 및 온 센터부의 양측에 형성되는 오프 센터부를 포함하는 것을 특징으로 한다.
ELECTRIC POWER STEERING APPARATUS
전동식 파워 스티어링 장치
2024-01-03
Patent
Electronic Resource
Korean
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