Connecting rod

A reciprocating piston machine, comprising:

• a reciprocating piston for performing an oscillating stroke movement,
• a cylinder at least partially enclosing the reciprocating piston for guiding the stroke movement,
• a crankshaft having a crank pin mechanically connected to the reciprocating piston for performing a rotary movement coupled to the stroke movement, and
• a connecting rod connecting the reciprocating piston and the crankshaft for coupling the reciprocating movement and the rotary movement, the connecting rod including:
• a hollow-cylindrical connecting rod bushing for receiving a piston pin of the piston, the connecting rod bushing having a cylinder axis;
• a hollow-cylindrical connecting rod bearing for mounting the crank pin of the crankshaft, the connecting rod bearing having a bearing axis running parallel to the cylinder axis of the connecting rod bushing;
• and
• a shaft extending perpendicular to the bearing axis coupling the connecting rod bushing to the connecting rod bearing;
• wherein the connecting rod bearing includes a connecting rod saddle materially coupled to the shaft, a connecting rod cap materially separated from the shaft and a connecting rod joint coupling the connecting rod saddle to the connecting rod cap, the connecting rod joint defining a Hirth serration extending about a central angle between the connecting rod saddle and the connecting rod cap.

A connecting rod for a reciprocating piston machine, comprising:

• a hollow-cylindrical connecting rod bushing for receiving a piston pin, the connecting rod bushing having a cylinder axis;
• a hollow-cylindrical connecting rod bearing defining a bearing surface for mounting a crank pin, the connecting rod bearing having a bearing axis running parallel to the cylinder axis of the connecting rod bushing, wherein the bearing surface extends circumferentially around the bearing axis;
• and
• a shaft extending perpendicular to the bearing axis coupling the connecting rod bushing to the connecting rod bearing;
• wherein the connecting rod bearing includes:
• a connecting rod saddle materially connected to the shaft;
• a connecting rod cap materially separated from the shaft;
• a connecting rod joint coupling the connecting rod saddle to the connecting rod cap, the connecting rod joint defining a Hirth serration having a plurality of teeth extending circumferentially along a central angle between the connecting rod saddle and the connecting rod cap, the central angle being less than 360°, wherein the plurality of teeth of the Hirth serration includes at least one of (i) at least one tooth defining a first angle ascending radially in a direction away from the central angle and (ii) at least one other tooth defining a second angle descending radially in the direction away from the central angle;
• wherein the connecting rod joint includes a plane surface defined by the connecting rod saddle and a mating surface defined by the connecting rod cap, the plane surface and the mating surface spatially separating the bearing surface from the Hirth serration.