| 摘要 |
PROBLEM TO BE SOLVED: To provide a groove suppressing transmission of heat generated in a compression chamber to a drive shaft from a boss part of a scroll. SOLUTION: A plurality of compression chambers 16A are defined by a lap part 7A of a fixed scroll 5A and a lap part 15A of a turning scroll 13A. A drive shaft 31 driven by a motor 27 is fitted on the boss part 19A of the turning scroll 13A. An elongated groove 21A and a recess part 24A are provided on the boss part 19A and a circumference groove 36A is provided on the drive shaft 31. Consequently, since spaces 22A, 25A, 37A in a radial direction and an axial direction can be formed between the boss part 19A and the drive shaft 31, it is prevented that heat generated in the compression chamber 16A side is transmitted to the drive shaft 31 from the boss part 19A and temperature of bearings 29A, 39A become high, and durability can be improved. COPYRIGHT: (C)2006,JPO&NCIPI
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