# US 8,783,594 B2 · Roller mill with driven grinding roller

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- Number: US 8,783,594 B2
- Document ID: US8783594B2
- Status: Granted
- Kind: B2
- Application number: 13/055,723
- Filed: 2009-08-24
- Published: 2011-05-26
- Granted: 2014-07-22
- Earliest claimed: 2008-08-25
- Applicants: Guido Scholz
- Inventors: Guido Scholz
- Web page: https://patentgrep.com/patent/US8783594B2

## CPC

- B02C 15/04: Mills with pressed pendularly-mounted rollers, e.g. spring pressed
- B02C 15/006: {Ring or disc drive gear arrangement}
- B02C: CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN ({household tools and machines for pulverising foodstuffs, e.g. coffee and spice mills A47J42/00; pharmaceutical mortars A61J3/02; mechanical processing of refuse and garbage B03B9/06; dressing mould materials by grinding B22C5/04}; obtaining metallic powder by crushing, grinding or milling B22F9/04; {recovery of plastics by disintegrating B29B17/00; crushing raw materials in starch making C08B30/02; beaters for papermaking D21D1/02; crushing devices specially for transport in mines E21F13/002; slag crushing devices F23J1/00; fuel milling devices in combustion apparatus F23K1/00; household devices for crushing coal F24B15/02; ice disintegrating devices F25C5/02})

## Abstract

A roller mill includes a rotatable grinding table, at least one grinding roller that is retained rotatably on a pivot lever and is in rolling engagement with the grinding table, with the pivot lever being arranged for pivoting about a pivot lever axis, and a drive train associated with the grinding roller in order to drive the grinding roller with a fixed motor.

## Claims

### Claim 1

Roller mill comprising:
a. a rotatable grinding table,
b. at least one grinding roller rotatably retained on a pivot lever and in rolling engagement with the grinding table, the pivot lever being arranged for pivoting about a pivot lever axis, and
c. a drive train associated with the grinding roller and driving the grinding roller with a fixed motor,
characterised in that the drive train has a coupling arranged in the pivot lever axis or the extension thereof, the coupling compensating for the pivot movement of the pivot lever.

### Claim 2 (depends on 1)

Roller mill according to claim 1, characterised in that the coupling is in the form of a torsionally rigid compensation coupling.

### Claim 3 (depends on 1)

Roller mill according to claim 1, characterised in that the coupling is in the form of a tooth coupling.

### Claim 4 (depends on 1)

Roller mill according to claim 1, characterised in that the coupling is in the form of a cardan shaft.

### Claim 5 (depends on 1)

Roller mill according to claim 1, characterised in that the drive train is redirected through 180° from the motor to the grinding roller.

### Claim 6 (depends on 1)

Roller mill according to claim 1, further comprising a pivot lever bearing for the pivoting of the pivot lever, the roller mill characterised in that the grinding roller is arranged on the pivot lever with a grinding roller bearing and the grinding roller bearing, the pivot lever bearing and the coupling have a common oil chamber.

### Claim 7 (depends on 1)

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.

### Claim 8 (depends on 1)

Roller mill according to claim 1, characterised in that the drive train comprises a fixed gearing mechanism and a pivoting gearing mechanism that pivots with the pivot lever and/or the grinding roller.

### Claim 9 (depends on 1)

Roller mill according to claim 1, characterised in that the drive train comprises at least one gearing mechanism in the form of an epicyclic gear system and secured to the pivot lever in the region of the grinding roller.

### Claim 10 (depends on 9)

Roller mill according to claim 9, characterised in that the epicyclic gear system is in the form of a power-splitting gearing mechanism.

### Claim 11 (depends on 9)

Roller mill according to claim 9, characterised in that the epicyclic gear system is in the form of a planet gear system.

### Claim 12 (depends on 1)

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

### Claim 13 (depends on 1)

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.