Scroll fluid machine with lubrication of oldham coupling

摘要

A scroll fluid machine comprising an upper and a lower scrolls provided in and upper and a lower positions, respectively, in a casing and supported eccentrically to each other; a coupling whose central member is provided under the lower scroll and whose peripheral member is provided at the upper scroll and conjoined to the central member; and a shallow oil storage recess provided at the bottom of the inside of the casing near the central member and facing the central member.