| 摘要 |
PROBLEM TO BE SOLVED: To provide a crankshaft structure of an engine for improving the flexibility of the design of the shape of a crank web by a simple structure, for reducing the weight, and for improving the workability by preventing the inclination of the crankshaft when assembled and press-fitted and supporting the press-in load. SOLUTION: The crankshaft 50 has the crank web 64 rotating together with main shafts 52 and 61. The crank web 64 has an outer peripheral side crank weight part 64c projecting along the outer peripheral edge and a rotation center side crank weight part 64d projecting at the center of rotation of the crank web 64 in the same direction as the outer peripheral side crank weight part 64c. In the crankshaft 50, the thickness of parts other than the outer peripheral side crank weight part 64c of the crank web 64, the rotation center side crank weight part 64d, and the engagement part the crank pin 63 is engaged is minimized. COPYRIGHT: (C)2003,JPO
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