Crankshaft and connecting rod assemblies for hydraulic fracturing pumps

An assembly, comprising:

• a crankshaft including:
• a first journal configured to be rotatably supported in a first frame section of a pump;
• a second journal configured to be rotatably supported in a second frame section of the pump, the first and the second journals defining therebetween a longitudinal crankshaft axis;
• and
• a crankpin between the first journal and the second journal and defining a longitudinal crankpin axis extending substantially parallel to and offset from the longitudinal crankshaft axis, the crankpin including:
• a crankpin body extending along the longitudinal crankpin axis and defining a crankpin surface, the crankpin surface being substantially cylindrical;
• a first ridge at least partially extending circumferentially around the crankpin surface;
• and
• a second ridge longitudinally spaced from the first ridge and at least partially extending circumferentially around the crankpin surface;
• a first connecting rod including:
• a first elongated rod body defining a first longitudinal rod axis and having a first crank end and a first plunger end opposite the first crank end, the first crank end including:
• a first crankpin connector connected to the crankpin between the first journal and the first ridge;
• and
• a second crankpin connector connected to the crankpin between the second ridge and the second journal, the first crank end defining a connecting rod clearance between the first crankpin connector and the second crankpin connector;
• and
• a second connecting rod including a second elongated rod body defining a second longitudinal rod axis and having a second crank end and a second plunger end opposite the second crank end, the second crank end including a third crankpin connector connected to the crankpin between the first crankpin connector and the second crankpin connector of the first connecting rod.