| 摘要 |
PROBLEM TO BE SOLVED: To provide a thrust roller bearing preventing the center part of rollers from being worn by a retainer even under an insufficient lubricating environment. SOLUTION: Each of pairs of column parts 22 comprises a both radial column end parts 22a and a column center part 22b between the both column end parts. A roller guide part 24 for guiding both end parts of the rollers is formed between the both column end parts facing each other (first space therebetween) in the circumferential direction. A circumferential space between the both column center parts facing each other (second space therebetween) is set larger than the first space therebetween. The both column center part comprises bent parts 22b2 with roller stoppers 22b1 positioned on the axial both sides of a PCD and a plurality of connection bars 22b3 connecting both bent parts to each other. COPYRIGHT: (C)2007,JPO&INPIT
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