CRANKSHAFT OF AN INTERNAL COMBUSTION ENGINE

摘要

Crankshaft (1) of an internal combustion engine (2) having a crankcase (3) and a plurality of piston rods (10) moved by corresponding pistons (9); the crankshaft has a plurality of crank cheeks (17) which can be coupled to the crankcase (3) in such way that they are rotatable about an axis (7), a plurality of crankpins (16) which are eccentric with respect to the crank cheeks (17) and can be journalled in corresponding piston rods (10), and a plurality of arms, each connecting the center of a corresponding crank cheek (17) to the center of an adjacent crankpin (16); the crankshaft is made in one piece, while the arms are delimited by corresponding cylindrical lateral surfaces (18) which can be coupled with a sliding fit directly to the crankcase (3) in a rotatable way to form the crank cheeks (17).