| 摘要 |
PURPOSE:To prevent the intrusion of oil supplied onto a thrust bearing, by forming a plurality of returned oil holes which are always positioned on the inner peripheral side of the annular part of an Oldham's coupling in the vicinity of the keyway of a bearing frame and at the position departing by 90 deg. from the keyway. CONSTITUTION:The annular part of the Oldham's coupling 13 of a scroll compressor is arranged between a swing scroll back surface part and a bearing frame, keeping a little gap. A plurality of oil returning holes 25 are formed at the position on the inner peripheral side of the annular part of the Oldham's coupling 13 and in the vicinity of the keyway 8a of a bearing frame and at the position departing by 90 deg. from the keyway. Therefore, the oil supplied onto a thrust bearing 21 from an oil reservoir is returned to an oil reservoir from a returned oil hole 25, and the intrusion of oil into a compression chamber and flow-out into a refrigeration cycle are prevented.
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