Material processing device, in particular crusher

A crusher for crushing mineral materials, comprising:

• an internal combustion engine;
• a crusher unit;
• and
• a drive train for mechanically coupling the internal combustion engine to the crusher unit to drive the crusher unit, the drive train including:
• a motor coupling configured to selectively couple the internal combustion engine to the drive train, the motor coupling including an output end;
• a crusher unit coupling configured to selectively couple the crusher unit to the drive train, the crusher unit coupling including an input end;
• and
• a motor generator including a motor rotor and a motor stator, the motor rotor including a motor generator shaft coupled to both the output end of the motor coupling and to the input end of the crusher unit coupling in a rotationally fixed manner;
• the motor generator having a motor mode of operation in which the motor generator provides mechanical work for driving the crusher unit, and the motor generator having a generator mode of operation in which the motor generator is driven by the internal combustion engine to generate electrical power;
• wherein the motor rotor is coupled to the motor generator shaft by a transmission so that the motor rotor is rotatable relative to the motor generator shaft, and the motor generator shaft includes a first toothing, the motor rotor includes a second toothing, the motor generator further includes a gear meshing with the first toothing, and the second toothing of the motor rotor meshes with the gear directly or with the interposition of at least one further gear.