Crankshaft case for piston engine has cradles for crankshaft and vertical and horizontal reinforcing ribs, some of which form cavities opening to outside of the casing while others surround bases of cradles

摘要

The crankshaft case for a piston engine has cradles (3) for the crankshaft and vertical (2) and horizontal (4) reinforcing ribs. Some of these form cavities (28) opening to the outside of the casing while others surround the bases of the cradles.