| 摘要 |
PROBLEM TO BE SOLVED: To provide a joining structure between two members and a propeller shaft, which avoids increase of weight due to reinforcement while ensuring an engagement of a serration part. SOLUTION: An outside diameter of the serration part 107 of a metal yoke 101 is greater than an inside diameter of a cylindrical press-fitting portion 109 of an FRP cylinder 102 by 0.6 mm or more. Further, a thickness of a reinforcing layer 102b in the FRP cylinder is set to be 0.1-1.2 times as thick as a body part 102a. Therefore, grooves cut by the serration part 107 on the inside surface of the press-fitting portion 109 are formed to be deeper than those by conventional methods, and sufficient transmission of torque becomes available. In addition, because a reinforcing effect for the FRP cylinder is restricted for preventing generation of a crack at the press-fitting portion, the weight and cost are reduced correspondingly.
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