| 摘要 |
PROBLEM TO BE SOLVED: To reduce cost by decreasing the number of slots formed on a race or the like. SOLUTION: In this stacked thrust-supporting mechanism composed of a front race 1 fixed to a housing 10, a front roller 2 and a front cage 4 rotating in a first direction, a middle race 3, a rear roller 5 and a rear cage 7 rotating in a second direction, and a rear race 6 revolving with a turning part 11, without accompanying the rotation on its own axis, two front pins 8a penetrated through the slots 1a, 4a to permit only relative movements in the first direction, are mounted on each member at a front side of the middle race 3, and two linear pins 8b which penetrate through the slots 6a, 7a to permit only the relative movement in the second direction, are mounted on each member on the rear side of the middle race 3. The middle race 3 produces sine wave motion in the first direction, but since the middle race 3 is uniformly supported by two pear pins 8b at both dead centers, its position in the rotating direction is stabilized, and the noise and the vibration can be prevented.
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