| 摘要 |
<p>A motor-driven power steering system (1) is adapted to transmit rotation of a rotating shaft (16) of an electric motor (15) to an automotive steering mechanism via a worm shaft (18) and a worm wheel (19) for assisting a steering operation. The system comprises first and second bearings (23, 33; 23, 41) which rotatably support first and second ends (21, 22) of the worm shaft (18), respectively. For suppression of an increase in backlash, a biasing member (40) biases the second end (22) of the worm shaft (18) radially toward the worm wheel (19) via the second bearing (33; 41). The first bearing (23) has a spherical support surface (26a) for pivotally supporting the first end (21). <IMAGE></p> |
