| 摘要 |
PROBLEM TO BE SOLVED: To suppress bearing pressure between a sprocket and a sprocket support body. SOLUTION: The sprocket support body 74 has a first outer peripheral surface section 90 and a second outer peripheral surface section 94. The first and second outer peripheral surface sections support inner peripheral surface of each of first and second sprockets to rotate each sprocket about a shaft, and have a radially inward spline and a radially outward spline. The radially inward splines of the first and second outer peripheral surface sections have radially inside surfaces at positions separated from the rotary shaft by first and second radially inside distances, and the radially outwarded splines of the first and second outer peripheral surface sections have radially outside surfaces at positions separated from the same rotary shaft by first and second radially outside distances. The first radially outside distance is different from the second radially outside distance, and the first radially inside distance is substantially equal to the second radially inside distance. COPYRIGHT: (C)2004,JPO&NCIPI
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