| 摘要 |
PROBLEM TO BE SOLVED: To simplify size control so as to reduce costs by arranging a stepped part on a stem of a propeller shaft, extendedly arranging an outer cylindrical part of a dynamic damper, and fitting the outer cylindrical part to the stepped part. SOLUTION: A first stepped part 8 is disposed on an end part of a stem 4 of a propeller shaft 2, a hollow pipe 6 is pressed-in and fitted to the first stepped part 8, and a dynamic damper 10 is disposed in the hollow pipe 6. A second stepped part 12 having a diameter smaller than that of the first stepped part 8 is arranged on an end part of the stem 4 of the propeller shaft 2, an outer cylindrical part 14 of the dynamic damper 10 is extendedly arranged, and the outer cylindrical part 14 is fitted to the second stepped part 12. Even if size control of an inner diameter of the hollow pipe 6 of the propeller shaft 2 and/or the outer diameter of the outer cylindrical part 14 of the dynamic damper 10 is not strictly carried out, the dynamic damper 10 can be fixed to a prescribed position in the hollow pipe 6 of the propeller shaft 2, and it is also possible to simplify the size control.
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