| 摘要 |
PROBLEM TO BE SOLVED: To achieve low torque without lowering the rigidity of a bearing. SOLUTION: This tapered roller bearing is provided with an inner ring 2, an outer ring 3, a plurality of tapered rollers 4 arranged between the inner ring 2 and the outer ring 3 so as to be freely rolled, and a cage 5 storing the tapered rollers 4 inside pockets 9 at circumferential predetermined intervals. The cage 5 comprises a small annular part 6 continued in small end face sides of the tapered rollers 4, a large annular part 7 continued in large end face sides of the tapered rollers 4, and a plurality of cage bar parts 8 connecting the small and large annular parts 6, 7. Between the adjacent cage bar parts 8, the pocket 9 is formed to have a trapezoid shape in which a portion for storing the small diameter side of the tapered roller 4 becomes the narrow width side and a portion for storing the large diameter side becomes the wide width side. In this case, the cage 5 comprises engineering plastics having excellent mechanical strength, oil resistance and heat resistance. Notches 10a to 10c are provided in the cage bar parts 8 in the narrow width sides of the pockets 9. A window angle of the pocket 9 is set to be≥55°and≤80°, and a roller coefficient is set≥0.94. COPYRIGHT: (C)2007,JPO&INPIT
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