| 摘要 |
PROBLEM TO BE SOLVED: To provide a rotation preventing mechanism for a scroll fluid machine as improvement of the conventional technique involving such a problem where an excessive load acts on each bearing to result in its breakage in the case pin crank mechanisms installed at a constant pitch on a circumference for coupling the end plate of a revolving scroll with a frame mechanically have poor positional accuracy relative to one another or owing to prying generated between the bearings with one another originating from a deformation, etc., of the revolving scroll. SOLUTION: The scroll fluid machine is composed of: pin crank shafts each formed of a supporting shaft in columnar shape and an eccentric shaft in prism shape installed eccentrically to the same degree as the revolving axis of a shaft with respect to the axis of the supporting shaft; a pin shaft bushing installed on the eccentric shaft and provided with a rectangular hole in the column; a resilient member installed between the eccentric shaft and the pin shaft bushing; and the pin crank mechanisms formed by inserting the pin shaft pushing and each pin crank shaft in a bearing fixed to the revolving scroll and the frame. COPYRIGHT: (C)2004,JPO
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