| 摘要 |
PURPOSE: To improve the performance of a compressor by forming a crescent cutoff portion at the side of a driving pin of a driving shaft coupled with an eccentric bushing under an orbiting scroll, and a crescent plane portion at the side of an eccentric hole of the eccentric bushing. CONSTITUTION: An eccentric hole 23' of an eccentric bushing 23 and a driving pin 22 are crescent-shaped by removing a side part from them. Reactionary force and centrifugal force of an orbiting scroll act upon the center of the eccentric bushing 23 coupled with the back of the orbiting scroll to rotate the eccentric bushing 23 eccentrically with the driving pin 22 as the center. When the eccentric bushing 23 is rotated left-wise across aθwith respect to the driving pin 22 in the shape of the driving pin 22 and the eccentric hole 23' of the eccentric bushing 23 coupled the driving pin 22 under such a condition, the orbiting radius which is the distance between the center O1 of a driving shaft 21 and the center O3 of the eccentric bushing 23 changes fromεtoε', however the rotation of the eccentric bushing 23 is limited such that the value thereof is smaller than a predetermined minimum reference value. The orbiting radius is limited within a predetermined maximum reference value in right-wise rotation.
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