| 摘要 |
PROBLEM TO BE SOLVED: To elongate the service life of a cutting edge by facilitating the machining of a knock pin insertion hole. SOLUTION: This crankshaft supporting device is attached to a cylinder block of an engine to support a crankshaft, and is provided with a support member formed by casting preform in its inside using aluminum alloy as a base metal, and the support member is provided with a supporting member side fitting surface, a bolt insertion hole, and the knock pin insertion hole. This device is characterized in that the preform is provided with a through part with a through hole which is formed into a bolt insertion hole, and a relief part for forming the knock pin insertion hole comprising the base metal is formed between the support member side fitting surface and the opposed surface of the through hole opposed to the support member side fitting surface. COPYRIGHT: (C)2004,JPO
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