Hydrostatic displacement machine e.g. radial piston engine, has piston supported in piston recess of cylinder drum, and implementing balance movement arranged in transverse direction of groove web in area of rolling body

摘要

The machine (1) has a piston (4) supported at a stroke-producing bearing surface (6) by a spherical rolling body (W), where the bearing surface is provided with a groove web (20) with a circle-arc-shaped cross section. The piston is supported in a piston recess (3) of a cylinder drum (2) for balancing a misalignment between a longitudinal axis (L) of the piston recess and the groove web of the bearing surface such that the piston implements a balance movement arranged in a transverse direction of the groove web in an area of the rolling body.