| 摘要 |
<p>An electric power steering device provided with two belleville springs (12, 12) for suppressing the axial movement of a worm (3) rotated by a steering-assisting electric motor (1) and having shaft portions (3b, 3c) at its both end portions, and limiting members (13, 13) for limiting the deflection amounts of the two belleville springs (12, 12). The limiting members (13, 13) are respectively disposed at portions along the outer circumferences of the shaft portions (3b, 3c) at both end portions of the worm (3), the respective inner circumferential portions of the two belleville springs (12, 12) are formed into flat portions (12a, 12a), the outer circumferential portions thereof are respectively formed into tapered portions (12b, 12b) having a taper shape, and the limiting members (13, 13) are made contact with the flat portions (12a, 12a), thereby limiting the deflection amounts of the tapered portions (12b, 12b). Hence, the limiting members (13, 13) can be provided without increasing the size of the worm (3) serving as a small gear.</p> |
