| 摘要 |
PROBLEM TO BE SOLVED: To provide a light hollow power transmission shaft while securing the required strength. SOLUTION: A power transmission shaft 1 is formed so that each of both axial parts is formed on the small diameter part 1b rather than the large diameter part 1a, besides the axial intermediate part is formed on a large diameter part 1a. This power transmission shaft 1 is of the pipe material that forms an axial intermediate part thinner than both axial side parts and manufactured by drawing process only to both axial side parts of this pipe material. COPYRIGHT: (C)2006,JPO&NCIPI
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