| 摘要 |
PURPOSE:To permit the sliding parts of respective bearings to effect sufficient lubricating effect by a method wherein the upper end of a first oil supplying groove is closed to form one continuous oil passage from the lower end of a main bearing to a thrust bearing. CONSTITUTION:The first oil supplying groove 31 is located at the side of the internal peripheral surface 18a of a swing scroll bearing 18 and the lower end thereof is communicated with a first space 30 while the upper end thereof is closed. Here, the first oil supplying groove 31 is extended to the vicinity of upper end surface of the swing scroll bearing 18 so as to prevail the oil sufficiently into the sliding surfaces of the bearing 18 and a scroll shaft 2c in order not to cause the run-off of the oil and is communicated at this part with second oil supplying groove 33 and second oil supplying hole 34. On the other hand, the oil supplying groove 33 is also extended to the vicinity of the lower end surface of the main bearing 19 so as to prevail the oil sufficiently in the sliding surfaces of the main bearing 9 and the main shaft 6. According to this method, the oil passage to the oil supplying groove 21 through the oil supplying hole 23, the space 30, the oil supplying groove 31, the oil supplying hole 34, the oil supplying groove 33 and the space 32 may be formed and sufficient lubricating effect in respective sliding parts of the bearings may be achieved.
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