| 摘要 |
PROBLEM TO BE SOLVED: To ensure the durability of a pair of inward facing collar parts 4b, 4c formed in both end parts of a shell 1c irrespective of thrust load applied from each needle 2a while ensuring load capacity. SOLUTION: Inner side faces 10a, 10b of both of these inward facing collar parts 4b, 4c are inclined faces inclined in the direction in which an interval becomes wider when approaching the inward part in the radial direction. Both end faces in the axial direction of each needle 2a are composed of chamfered parts 8, 8 in an outer peripheral fringe part and flat face parts 9, 9. It is possible to prevent large moment load from being applied to a terminal part of the inward facing collar part 4b (4c) even when an end face of each needle 2a is butted on the inner side face 10a (10b) in the inward facing collar part 4b (4c) by thrust load. COPYRIGHT: (C)2005,JPO&NCIPI
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