Pump piston

A piston pump with at least one piston (20) supported so that the piston moves in a housing (10), a drive shaft (27), upon which a swash plate (26) for driving the piston (20) is non-rotatably disposed, said swash plate pivots around a swash plate pivot axis, and with a device for adjusting a pivot angle between the drive shaft (27) and the swash plate (26), the device for adjusting the pivot angle of the swash plate (26) has a displacing device (41) disposed on the housing (10), said displacing device acts upon the swash plate (26) via a rotating intermediate member (33) for adjusting the pivot angle, the swash plate (26) is pivotably secured on a driving pin (28) disposed in a direction of the swash plate pivot axis, and that the intermediate member (33) includes a sleeve section (34), which extends in a longitudinal direction of the drive shaft, from a section (36) of the intermediate member (33) which carries an annular face (35) into a central recess (37) of the swash plate (26), and which contains first and second longitudinal slots (38) which run in the longitudinal direction of the drive shaft and are diametrically opposed to each other in relation to the drive shaft (27), and the driving pin (28) extends through said longitudinal slots (38), and on the intermediate member (33) or on the swash plate (26), an axially directed projection (39) is provided, which engages in a recess (40) in the swash plate (26) or in the intermediate member (33).