Roller with driven grinding roller

1. Roller mill comprising:

a. a rotatable grinding table,

b. at least one grinding roller retained rotatably on a pivot lever and in rolling engagement with the grinding table, the pivot lever being pivotable about a pivot lever axis,

c. and at least one drive train connected to the grinding roller and having a fixed motor and a fixed gearing mechanism,

characterised in that the drive train further has a gearing mechanism which pivots with the pivot lever and/or the grinding roller.

2. Roller mill according to claim 1 , characterised in that the gearing mechanism which pivots is in the form of an epicyclic gear system.

3. Roller mill according to claim 1 , characterised in that the gearing mechanism which pivots is in the form of a power-splitting gearing mechanism.

4. Roller mill according to claim 1 , characterised in that the gearing mechanism which pivots is in the form of a planet gear system.

5. Roller mill according to claim 2 , characterised in that the gearing mechanism which pivots is secured to the grinding roller.

6. Roller mill according to claim 1 , characterised in that the gearing mechanism which pivots and the fixed gearing mechanism are connected to each other via an angularly adjustable coupling.

7. Roller mill according to claim 1 , characterised in that the gearing mechanism which pivots and the fixed gearing mechanism are connected to each other via an angularly and axially adjustable shaft.

8. Roller mill according to claim 6 , characterised in that the pivot lever is arranged in a bearing between the gearing mechanism which pivots and the fixed gearing mechanism and the angularly adjustable coupling is provided in the region of the bearing.

9. Roller mill according to claim 1 , characterised in that the pivot lever is arranged in a bearing and the gearing mechanism which pivots is arranged upstream of the bearing in the drive train.

10. Roller mill according to claim 1 , characterised in that the pivot lever is in the form of a hollow shaft and a portion of the drive train is arranged in the hollow shaft.

11. Roller mill according to claim 1 , characterised in that the drive train has a coupling which is arranged in the pivot lever axis or the extension thereof and which compensates for the pivot movement of the pivot lever.

12. Roller mill according to claim 11 , characterised in that the coupling is in the form of a curved-tooth coupling.

13. Roller mill according to claim 11 , characterised in that the angularly and axially adjustable shaft is in the form of a cardan shaft.

14. Roller mill according to claim 1 , characterised in that the pivot lever extends through a mill housing and the grinding roller is retained on the end of the pivot lever in the mill housing whereas the other end is arranged in a bearing outside the mill housing.

15. Roller mill according to claim 1 , characterised in that a pressing system which is in operational contact with the pivot lever is provided in order to adjust the pressing pressure of the grinding roller.

16. Roller mill according to claim 1 , characterised in that the pivot lever is arranged in a bearing and the fixed gearing mechanism is arranged downstream of the bearing in the drive train.