MOTOR-DRIVEN POWER STEERING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a motor-driven power steering device capable of lengthening the service life by improving dimensional stability, heat resistance and strength of a worm wheel by molding the worm wheel for transmitting rotation of a steering assisting force generating motor-driven actuator out of a nanocomposite with fine apatite particles dispersed in a synthetic resin material. SOLUTION: The rotation of the steering assisting force generating motor- driven actuator 8 is transmitted to wheels 6 via a driving gear 9 and a driven gear 10. The driven gear 10 is molded by the nanocomposite with the apatite particles dispersed in a base material made of the synthetic resin material.