PISTON UNIT FOR A RADIAL PISTON MACHINE

摘要

The invention relates to a piston unit of a radial piston machine. The piston unit has a stepped piston and a roller or a roller body. A hydrostatic pressure or force release is provided in a contact region between the stepped piston and the roller, said release forming a pressure field. The stepped piston has two retaining sections adjacent to the roller. According to the invention, said sections are elastic and/or the stepped piston has a respective weakened point in the region of the step between the main section and the retaining sections. This allows the retaining sections to lie tightly against the roller thus reducing a gap or distance therebetween.