| 摘要 |
PROBLEM TO BE SOLVED: To prevent a lubricating oil from leaking at a connection part despite the fact that rotating shafts with lubricating grooves are formed in a split structure. SOLUTION: The lubricating grooves 74 and 84 are formed in the rotating shaft 70 of a compression mechanism 50 formed integrally with an electric motor 40 and the rotating shaft 80 of an expansion mechanism 60. The both rotating shafts 70 and 80 are connected to each other by fitting a fitted projected part 85 and a fitted recessed part 75 formed at the shaft ends thereof. A seal groove S is formed in the peripheral surface of the fitted projected part 85, and an O-ring R is fitted into the seal groove S. Thus, the lubricating oil is prevented from leaking between the fitted projected part 85 and the fitted recessed part 75. COPYRIGHT: (C)2006,JPO&NCIPI
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