VARIABLE DISPLACEMENT TYPE COMPRESSOR HAVING PISTON ROTATION PREVENTING STRUCTURE

摘要

PURPOSE: A variable displacement swash plate type compressor having a structure for preventing the rotation of a piston is provided to be received in a small crank case for reducing the whole diameter of the crank case. CONSTITUTION: A variable displacement swash plate type compressor(10) having a structure for preventing the rotation of a piston includes a cylinder block(12) formed with a plurality of cylinders(14) inside, a crank case(18) mounted at an end of the cylinder block for sealing the cylinder block and having an inner wall formed with longitudinal depressed portions(24) between bearing surfaces(22), and a plurality of pistons(52) mounted in the respective cylinders slidably, wherein each of the piston has a structure(60) for preventing the rotation to be aligned at a position corresponding to the depressed portion with a clearance in a radial direction, and the rotation preventing structure includes a pair of facing shoulder parts and an outer surface(73) extended between the shoulder parts.