Wobble plate type compressor with rotation-preventing mechanism

Abstract

An improved wobble plate type refrigerant compressor in which the tendency of the wobble plate to rotate is reduced. The wobble plate is prevented from rotating and is allowed to nutate by a rotation-preventing mechanism which includes a pair of bevel gears which are coupled together. One bevel gear is located within the wobble plate and the other bevel gear is supported on the cylinder block. A steel ball is located between the bevel gears. The improvement is achieved by locating the bevel gear within the wobble plate so that the connecting rods are inclined to the axis of the cylinders. This arrangement is achieved by locating the bevel gear so that a line connecting the center of the bevel gear and including a point on the edge of the bevel gear located exactly between two teeth of the bevel gear includes a third point near the edge of the wobble plate which is located between receiving portions of the wobble plate but which is not located at the center between the two receiving portions. Rather, this point is shifted within a range of 5.degree. in the rotational direction along the edge of the wobble plate from the centrally located point. The resulting construction reduces the rotational force created at the point of connection of the two bevel gears and thus increases the durability of the rotation-preventing mechanism and reduces vibration and noise.