| 摘要 |
PROBLEM TO BE SOLVED: To suppress deterioration in belt durability by reducing an increase in a burden on a belt when an ambient temperature increases.SOLUTION: In an electric power steering device 100, a rotational force of a driving pulley 31 coaxially coupled with a rotary shaft 21 of an electric motor 20 is transmitted to a driven pulley 32 coupled with a rotation member (12) of a steering device 10 via a belt 33. In a driving pulley supporting part (portion including a bearing 23) for rotatably supporting the driving pulley 31, a regulating member 25 is arranged for regulating the separation movement of both pulleys 31, 32 when a housing (14) thermally expands according to an increase in the ambient temperature and thus a rotation center distance of the both pulleys 31, 32 increases. |
