| 摘要 |
PROBLEM TO BE SOLVED: To prevent minute wear from occurring on a rotary shaft due to the idle rotation of a thrust roller bearing during its usage without the fall-off of the thrust roller bearing assembled to the rotary shaft from the rotary shaft. SOLUTION: Because a plurality of needle rollers 4 held in holders 5 are interposed between a pair of an inner race 2 and an outer race 3 composed of annular thin plates, an inner cylinder 22 into which the rotary shaft 41 is inserted is formed on the inner peripheral side of the inner race 2, and a screw groove 22a for being screwed with a screw 42 formed on the outer peripheral face of a cylindrical protrusion 42 of the rotary shaft 41 on the inner peripheral face of the inner cylindrical part 22, in assembling the thrust roller bearing to the rotary shaft 41, the screw 42 on the outer peripheral face of the protrusion part 42 of the rotary shaft 41 and the screw groove 22a on the inner peripheral face of the inner cylinder part 22 of the inner race 2 are screwed, the inner race 2 is integrally connected to the rotary shaft 41, the thrust roller bearing is prevented from falling off from the rotary shaft 41, the idle rotation of the thrust roller bearing during use does not occur, and minute wear on the rotary shaft 41 is prevented from occurring. COPYRIGHT: (C)2007,JPO&INPIT
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