Principle of overhead conveyor driving unit: after increasing the force of reducer, the power output by speed regulating motor is transmitted to driving belt, so as to push conveyor chain forward. The transmission is stable, with low noise and high reliability of transmission power.

In the the general crawler driving seat based on the installation of a spring-limit pull device when abnormal situation when the chain jammed the driving seat to move some distance to the chain running in the opposite direction during the operation, when it hits installed in specific position switch, the conveyor stops running and the police. When troubleshooting, it is automatically restored to its original position.