| 摘要 |
Disclosed herein is a hollow-type crankshaft for use in an internal combustion engine and a reciprocal type air compressor, which includes a crankshaft web for connecting a crankshaft journal to a crankshaft pin, the crankshaft comprising: a reinforcing groove portion 4 formed on the outer peripheral surfaces of the crankshaft pin 1 and the crankshaft journal 2, and formed with a slope portion 41 inclined inwardly from both lateral walls of thereof, and a reinforcing member 40 made of metal different from the basic material, the reinforcing member being inserted into, melt-jointed and cast in the reinforcing groove portion 4.
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