Scroll type fluid apparatus with lubrication of rotation preventing mechanism and thrust bearing

A scroll type fluid apparatus provided with a fixed scroll, an orbiting scroll, a housing for fixing said fixed scroll, a thrust bearing for supporting said orbiting scroll rotatably to said housing, a crankshaft having an eccentric shaft for driving said orbiting scroll, and a rotation preventing mechanism for preventing said orbiting scroll from rotating by itself,

• said rotation preventing mechanism comprising a bearing portion provided at the rear side of said orbiting scroll, having a receiving portion for receiving therein said eccentric shaft, and formed to be square at the outer surface;
• a sliding member having inner surfaces engageable with two opposite outer surfaces at said bearing portion to regulate radial movement of said bearing portion in reciprocating movement, and formed to be square at the outer surface;
• and a holder for said sliding member, which has inner surfaces engageable with two opposite outer surfaces at said sliding member to regulate movement of said sliding member in the direction perpendicular to said moving direction of said bearing portion;
• said crankshaft being provided with lubrication means for lubricating said bearing portion, said rotation preventing mechanism being provided before and behind said sliding member in the sliding direction thereof with oil chambers tightly sealed and variable in volume due to the sliding motion of said sliding member, said bearing portion and sliding member being provided with connection means for connecting said oil chambers to said lubrication means, said thrust bearing being provided with communication means for communicating the slidable contact surface of said orbiting scroll with respect to said thrust bearing with said oil chambers.