A RECIPROCATING PISTON MACHINE, IN PARTICULAR A COMPRESSOR FOR A VEHICLE AIR-CONDITIONING UNIT

摘要

A reciprocating piston machine (100) is provided such as a C02 compressor for a vehicle air-conditioning unit. The machine (100) comprises a plurality of pistons and a swivel disk (107) that is rotated by and can be positioned at an adjustable angle with respect to a drive shaft (104) . The swivel disk (107) is mounted on the drive shaft (104) so as to be axially movable thereon. In addition, the swivel disk is connected in an articulated manner to at least one supporting element (109) which is disposed so that it is spaced apart from the drive shaft (104) but rotates therewith. Each of the pistons (106) comprises a joint arrangement (110) with which the swivel disk (107) is in sliding engagement. The connection (116) between the drive shaft (104) and the swivel disk (107) serves substantially only to transmit torque, whereas the supporting element (109) serves substantially only to provide axial support to the pistons (106) and/or to the swivel disk (107) and hence to absorb the force exerted by the gas.