Patent ID: 6044751
Filing Date: 2000-04-04
Classification: F04B,F05C

Abstract:
A variable displacement compressor comprising:a housing assembly having at least one cylinder;a drive shaft rotatably supported in said housing assembly;a cam plate arranged in said housing assembly and provided at a generally center thereof with a through hole, through which said drive shaft extends, said cam plate being provided in a wall surface of said through hole with a support portion abutted onto said drive shaft to establish a slidable support for said cam plate on said drive shaft;a joint mechanism for connecting said cam plate with said drive shaft to rotate said cam plate together with said drive shaft, said joint mechanism permitting said cam plate to shift on said drive shaft to change an inclination of said cam plate relative to said drive shaft;at least one piston respectively accommodated in said at least one cylinder and engaged with said cam plate to be reciprocated in said cylinder due to a rotation of said cam plate;a control mechanism for changing said inclination of said cam plate on said drive shaft to adjust a compressor displacement; anda friction reducing means for reducing friction force caused between said drive shaft and said support portion of said cam plate during an operation for adjusting said compressor displacement, wherein said friction reducing means includes a coating layer provided on said wall surface of said through hole of said cam plate to coat said support portion therewith, said coating lowering a coefficient of friction of said support portion abutted onto said drive shaft.