The invention relates to a sectional
flywheel with a plastic
fan blade for an engine, which is fixed on the front end of an engine
crankshaft by a
flywheel nut. The invention is characterized in that the invention includes a
flywheel and a plastic
fan blade which is tightly fixed on the screw hole of the flywheel by a bolt. A steel lining is arranged inside the screw hole of the plastic
fan blade. The flywheel is provided with the locating spigot round of the fan blade. The flywheel has a
miter joint with the two end planes of the fan blade. The invention changes the whole
cast iron flywheel vane into the subassembly of
cast iron flywheel and plastic fan blade. With the advantages of simple structure and low manufacture cost, the invention can prevent the vane damage in the
casting and transportation process, effectively improving the economical efficiency of the engine and simplifying the
casting technology of the flywheel. Reducing the defective index of the
cast iron vane, the invention is also favorable for improving the fan efficiency.