Drive unit for machinery, especially mining machinery

A drive unit for a machine comprising:

• a drive motor;
• a turbocoupling operatively connected with said drive motor;
• a transmission operatively connected to said turbocoupling, said transmission forming with said turbocoupling and said drive shaft motor, a drive train for a machine;
• and
• a free-shifting clutch along said drive train between said turbocoupling and said transmission and having clutch halves mutually engaging on standstill and functioning to decouple said transmission from said turbocoupling upon blockage of a machine to prevent overloading a friction clutch being provided between said turbocoupling and said free-shifting clutch along said string, said friction clutch connecting a driven side of said turbocoupling with an output side thereof, said turbocoupling comprising an impeller rotor connected with said motor, and a turbine rotor connected with said free-shifting clutch, said impeller rotor having a housing surrounding said turbine rotor and formed with a narrow housing portion connected to one side of said friction clutch, another side of said friction clutch being connected to a shaft between said turbine rotor and said free-shifting clutch.