Drive connection with integrated chain tensioning apparatus for face conveyors

A driving device for driving a sprocket-engaging a chain of a conveyor of a longwall device, comprising:

• a main driving unit configured to generate torque for driving the sprocket-;
• a main gear unit connected to the sprocket and configured to receive the torque generated by the main driving unit and to transmit the torque to the sprocket;
• and
• a drive connection interconnected between the main driving unit and the main gear unit, the drive connection including:
• a housing configured to be connected to the main driving unit and to the main gear unit;
• a drive shaft disposed within the housing and configured to transmit the torque from the main driving unit to the main gear unit;
• and
• a chain tensioning apparatus disposed within the housing and including a worm drive interacting with the drive shaft, the chain tensioning apparatus being configured to drive the drive shaft for tensioning the chain of the conveyor when the main driving unit is in a non-operative state.