Pic. 2.11. Balance shaft: 1 - crankshaft; 2 - drive; 3 – balancing shaft 2; 4 – balancing shaft 1; 5 - balancing shaft housing
The balance shaft is used to reduce vibrations. The balancing shaft is driven by a gear, which is mounted on the counterweight of the crankshaft. In addition, the polymer material gear reduces noise and facilitates the design.