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AssigneeDanfoss Power Solutions GmbH & Co. OHG
InventorsAnja Fiebing, Niels Christophersen, Carsten Fiebing
Estimating the term…
Hydraulic axial piston unit (1) of the swashplate construction type having a drive shaft (2) adapted to drive or be driven by a cylinder block (4). The cylinder block comprises a plurality of cylinder bores (6), in which several pistons (8) are moveable in general along the rotational axis (10) of the drive shaft (2) and relative to the cylinder bores (6). First ends of the pistons (8) protrude outside of the cylinder bores (6) and are slidable fixed by means of slippers (14) to a swashplate (16). The slippers (14) are hold down in a sliding manner on a sliding surface (18) of the swashplate (16) by means of a slipper hold down ring (20) arranged parallel to the sliding surface (18). The slipper hold down ring (20) is in a sliding contact with its radial inner surface (22) with a matching surface (26) on a guide ball (24) rotationally fixed on the drive shaft (2) and axially moveable in direction of the rotational axis (10) relative to the cylinder block (4) against resilient forces of springs (28) characterized in that a mounting ring (30) is attached to the cylinder block (4) in order to limit the axial movement of the guide ball (24) towards the cylinder block (4).
A hydraulic axial piston unit of the swashplate construction type having a drive shaft adapted to drive or be driven by a cylinder block having a plurality of cylinder bores, each cylinder bore having a piston moveable relative to the cylinder bore, wherein first ends of the pistons protrude outside of the cylinder bores and are slidably attached by means of slippers to a swashplate, wherein the slippers are held down in a sliding manner on a sliding surface of the swashplate by means of a slipper hold down ring arranged parallel to the sliding surface, and wherein the slipper hold down ring is in a sliding contact with its radial inner surface with a matching surface on a guide ball rotationally fixed on the drive shaft and axially moveable in direction of the rotational axis towards the cylinder block against resilient forces of springs;
Dependencies are inferred from the claim text.