Axial piston machine having a cooling circuit for the cylinders and pistons

Axial piston machine having a housing (1) with an interior housing chamber connected at one end with a connecting block, said housing chamber includes a first leakage chamber (37), a swash plate (3), a rotatably mounted cylinder drum (6) having cylinders (26, 28) and pistons (29) reciprocally movable in the cylinders, said pistons have a plurality of ends that project out of the cylinders (26, 28) and bear on the swash plate (3), first leakage fluid receiving chamber (25) is formed in a sleeve chamber, between a central opening in the cylinder drum and a drive shaft, said drive shaft is rotatively disposed in the central opening of the cylinder drum and surrounded by the cylinders (26, 28) in the cylinder drum (6) a plurality of supply and discharge channels (40, 41) are radially disposed through the cylinder drum (6), a cooling circuit is comprised of:

• a connection line (38) connected to the first leakage fluid receiving chamber (25) with the first leakage chamber (37), a cooling region (43, 44, 46) in the interior wall of the cylinders (26, 28) for cooling the cylinders, the cooling regions are connected by the supply channels (40) of the cooling circuit (7.1 to 7.4) to the first leakage fluid receiving chamber (25) and open out through the discharge channels (41) to the first leakage chamber, (19) for cooling the leakage fluid in the cooling circuit (7.1 to 7.4), and the first leakage fluid receiving chamber (25) widens in the direction of flow to an opening of the supply channels (40).