| 摘要 |
PURPOSE:To prevent fatigue of a hoop in its early stage by providing a hoop forming an endless carrier which has different peripheral lengths of both lateral side portions and disposing the side portion having the longer periphery on the other end side blocked up by a portion of a power transmission block in an endless carrier engaging surface. CONSTITUTION:The innermost hoop 11a forming an endless carrier is formed in such a manner that the radius of the left side portion of both lateral side portions is larger than that of the left side by DELTAl. Similarly another hoop forming an endless carrier has different peripheral lengths at both left and right side portions thereof. Accordingly, the moving to the nose cone 12h side is checked in case of moving the hoop laterally, so that no flash or crack is caused by each end surface of the hoop brought into contact with the nose cone.
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