Patent ID: 6077047
Filing Date: 2000-06-20
Classification: F04B

Abstract:
A variable displacement type compressor comprising:a housing having a cylinder bore therein;a piston located in the cylinder bore;a drive shaft rotatably supported by the housing;a rotary support mounted on the drive shaft;a cam plate connected to the piston, wherein the cam plate is supported tiltably on the drive shaft and is slidable in axial directions of the drive shaft, wherein the cam plate inclines between a maximum inclination position and a minimum inclination position when the displacement of the compressor is changed;a hinge mechanism located between the rotary support and the cam plate, wherein the hinge mechanism includes a first hinge part fixed to the cam plate and a second hinge part connected to the rotary support such that the first and second hinge parts engage with one another to form the hinge mechanism, and wherein a predetermined clearance exists between the first hinge part and the second hinge part, which permits a slight degree of slack in the movement of the cam plate in its inclining direction, and wherein the slack is taken up such that the hinge mechanism positively defines the angle of inclination of the swash plate when the cam plate is in its minimum inclination position while the compressor is running due to a first moment applied to the cam plate by a compression reaction force of the piston, and further wherein the cam plate rotates integrally with the drive shaft, the rotary support, and the hinge mechanism;an urging means located between the rotary support and the cam plate for urging the cam plate toward the minimum inclination angle position; andmeans for applying a second moment to the swash plate in the same direction as the first moment when the compressor is not operating.