Piston for a radial piston machine

摘要

A piston for a radial piston machine includes a metal core that is substantially provided with a casing made of plastic. The casing is configured to be produced from PEEK together with a bearing shell as one piece and injection-molded onto the core.

主权项

1. A radial piston machine, comprising:
a rotor configured to rotate about a rotational axis; and a plurality of pistons, each piston of the plurality of pistons having a longitudinal axis oriented perpendicular to the rotational axis, each piston comprising:
a metallic core including a metallic main portion having a recess configured to accommodate a rolling body; anda casing of plastics material injection molded onto the metallic core and including a bearing shell formed of the plastics material arranged on a wall of the recess facing the rolling body,wherein a surface of the bearing shell abutting the rolling body defines an indentation having a depth that is less than a nominal thickness of the bearing shell, andwherein the piston defines a channel extending through the piston fluidly connecting the indentation to an end face of the piston facing an operating space.