| 摘要 |
<p>A molded polymer cage (C) for a tapered roller bearing has end rings (20, 22) that are located beyond and extend across the large and small ends of the tapered rollers (6) for the bearing and bridges (24) that extend between and are formed integral with the two rings so as to form pockets (26) in which the tapered rollers are confined. The cage not only spaces the rollers at even intervals between the cup (4) and cone (2), but it further holds the rollers (6) around the cone when the cone is separated from the cup. To this end, the bridges (24) of the cage (C) are located entirely beyond the pitch circle for the rollers (6) so as to leave adequate space for the introduction and circulation of a lubricant, and each bridge along each of its side faces has two beveled surfaces (34, 36), namely, an inner surface (34) and an outer surface (36), both of which are planar. The outer surface (36) is located further from the cone and pitch circle than the inner surface (34) and is further disposed at a lesser angle with respect to the pitch circle. As a consequence, the outer surfaces (36) of the bridges (34) lap sufficiently over the rollers (6) to provide the cage (C) with excellent retention characteristics. </p> |
