ELECTRIC POWER STEERING DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce backlash quantity of an engage part between a worm and a worm wheel by a coil spring energizing a rolling bearing and improve durability of the coil spring. SOLUTION: A sliding bearing 13 supports a worm 71 interlocked with rotation of a motor 6 for assisting the steering in a housing 8. A coil spring 18 is wound around a periphery of the sliding bearing 13 in such a way an axis thereof being circular. The sliding bearing 13 is energized to the radial direction by the coil spring 18. Thus, backlash quantity of an engage part of the worm 71 and a worm wheel 72 can be reduced.