Power splitting for a comminuting device

A comminuting device comprising:

• a material receiving space;
• a rotor shaft arranged in the material receiving space;
• and
• a device for driving the rotor shaft, comprising:
• a first motor;
• a hydraulic gearing;
• and
• a synchronous gearing which is different from the hydraulic gearing and is configured to drive at least one rotor shaft or at least one drive shaft connected to a rotor shaft;
• and
• wherein the first motor and the hydraulic gearing are connected to the synchronous gearing.

A method for operating a device, comprising the following steps carried out in succession in the order listed:

• providing a device for driving the rotor shaft, comprising:
• a first motor;
• a hydraulic gearing;
• and
• a synchronous gearing which is different from the hydraulic gearing and is configured to drive at least one rotor shaft or at least one drive shaft connected to a rotor shaft;
• and
• wherein the first motor and the hydraulic gearing are connected to the synchronous gearing
• operating the first motor to transmit torque via the synchronous gearing (18, 28) to at least one shaft connected to the synchronous gearing in a first operating state at a first load of the at least one shaft essentially without transmitting torque from the hydraulic gearing to the at least one shaft;
• additionally operating the hydraulic gearing for transmitting torque via the synchronous gearing to the at least one shaft in a second operating state at a second load of the at least one shaft which is greater than the first load;
• and
• operating the hydraulic gearing for transmitting a torque increased relative to the second operating state via the synchronous gearing to the at least one shaft in a third operating state at a third load of the at least one shaft which is greater than the second load.