| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the cost without increasing number of parts and assembling man-hour and to surely inhibit lubricant from flowing excessively to the inside of a bearing. <P>SOLUTION: A roller bearing includes an inner ring 2 and an outer ring 3 which rotate relative to each other, a plurality of balls 4 which are disposed between the inner ring 2 and the outer ring 3, and a retainer 5 which is disposed between the inner ring 2 and the outer ring 3 and retains the balls 4 at equal intervals in the circumferential direction. The retainer 5 includes two axially opposing annular bodies 10 having opposing surfaces in which hemispherical pockets 12 for containing the balls 4 are formed in circumferential portions thereof, and the two annular bodies 10 are joined together with the opposing surfaces abutted against each other. Radially extending flange sections 18 are provided on the inner diameter side and the outer diameter side of the axial ends of the annular bodies 10. Grooves 20, 21 in which labyrinths 19 are formed between the same and the flange sections 18 are formed at the portions of the inner ring 2 or the outer ring 3 which face the flange sections 18, and. <P>COPYRIGHT: (C)2012,JPO&INPIT |
