Radial piston machine having braking means secured against twisting

A radial piston machine, comprising:

• a control surface that runs continuously around, and faces, an axis of rotation, wherein a spacing between the axis of rotation and the control surface varies along the circumference of the control surface;
• a housing including a ring-shaped extension, the ring-shaped extension extending along the axis of rotation;
• a rotor mounted in the housing so as to be rotatable relative to the axis of rotation, the rotor having an end face facing in a direction of the axis of rotation;
• a first braking member positioned on the end face of the rotor;
• a brake ring that is separate from the housing, that is positioned so as to surround the extension of the housing, that includes a second braking member, and that is configured to (i) be movable along the axis of rotation so as to bring the second braking member into braking engagement with the first braking member, and (ii) positively engage an outer radial side of the ring-shaped extension of the housing to limit a twisting between the housing and the brake ring;
• and
• at least one piston positioned in the rotor so as to be radially movable with respect to the axis of rotation, wherein:
• a path of movement for the piston that is directed radially outwardly is limited by the control surface;
• and
• a radial inner side of the at least one piston and the rotor delimit a first fluid chamber associated with the at least one piston.