Radial piston compressor with transmission element and piston guide ring

A piston-cylinder assembly for a radial piston compressor, comprising:

• a piston;
• a cylinder bore, in which the piston is arranged displaceably along a center line of the cylinder bore;
• a drive shaft with an axis of rotation and with a cylindrical eccentric, the center point of which is spaced apart from the axis of rotation of the drive shaft, wherein, during a rotational movement of the drive shaft, the piston is movable by the cylindrical eccentric in the cylinder bore in a manner directed outward in the radial direction away from the drive shaft as far as a top dead center;
• and
• a transmission element, which transmits the movement of the eccentric to the piston for generating the movement of the piston outward in the cylinder bore in a manner directed away from the drive shaft, wherein the transmission element has a first supporting surface with which the transmission element is supported on a cylinder surface of the eccentric;
• and
• a rolling contact bearing, the rolling contact bearing being arranged on the eccentric, the rolling contact bearing including an outer ring having a cylindrical outer shell surface, wherein the first supporting surface of the transmission element is supported on the cylinder surface of the eccentric by the rolling contact bearing;
• wherein the piston has a concavely shaped, first operative surface facing the transmission element, and the transmission element has a convexly shaped, second supporting surface facing the first operative surface, wherein the first operative surface and the second supporting surface form a form-fitting connection which is effective in the circumferential direction of the eccentric, and wherein a cylindrical piston guide ring is provided, through which the piston is movable in the cylinder bore in a manner directed inward toward the drive shaft in the radial direction from the top dead center (TDC) as far as a bottom dead center (BDC), wherein the piston has a convexly shaped, second operative surface which faces an inner shell surface of the piston guide ring and which, together with the inner shell surface of the piston guide ring, forms a form-fitting connection which is effective in the direction of the center line of the cylinder bore.