| 摘要 |
<p>A rack shaft supporting device (15) includes a support yoke (24), a plug (25) that closes the other opening (23) of an accommodation chamber (20), a ball screw mechanism (26) between the support yoke (24) and the plug (25), and a torsion urging member (27) between the ball screw mechanism (26) and the plug (25). The ball screw mechanism (26) includes: a first threaded portion (31) in which a first thread groove (31 B) is formed; a second threaded portion (32) in which a second thread groove (32G) is formed; and balls (33) arranged in a rolling path (34) formed of the first thread groove (31 B) and the second thread groove (32G). The torsion urging member (27) rotates the second threaded portion (32) relative to the plug (25) and moves the second threaded portion (32) toward the support yoke (24).</p> |
