| 摘要 |
In order to reduce the number of locations subjected to precision machining in a constant velocity joint mechanism, reduce the costs of the constant velocity join mechanism, and reduce the costs of a compressor, a compressor is provided with a constant velocity joint mechanism having balls held between guide grooves facing one another and formed on the bearing inner ring and outer ring. The guide grooves are formed in such a manner that one shoulder part (A) of one of the guide grooves and the shoulder part (B) of the other guide groove which is positioned on the opposite side to said shoulder part (A) wraparound so as to exceed a virtual line that links the center of the ball and the common center of rotation of the inner ring and the outer ring. The wraparound of these shoulder parts (A) and (B) is set in such a manner that even if the inner ring and the outer ring are rotated relative to one another in a direction moving away from one another, the ball will not drop from between the two guide grooves.
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