| 摘要 |
PURPOSE:To suppress the operation vibration of a compressor by joining a crack number made of the material having the smaller specific gravity than that of a shaft body having a cylindrical outer surface onto said shaft body and reducing the revolution imbalance force. CONSTITUTION:A crankshaft 8 consists of a shaft body 13 having a cylindrical outer surface which forms a main-shaft part 8a and a subshaft part 8b, and a crank member 14 which has an inner peripheral surface 14a in the nearly same shape to the shaft body 13 and an outer peripheral surface 14b eccentric for the inner peripheral surface 14a and forms a crank part 8c. Though the shaft body is made of cast iron, etc., the crank member is made of sintered alloy or resin material which has the smaller specific gravity than that of the shaft body.
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