Patent ID: 9297125
Filing Date: 2016-03-29
CPC Classification: E01C

Claim Text:
1. A road milling machine or a ground stabilizer, comprising: a rotatably driven milling cutter; and a drive unit for said milling cutter comprising a drive motor and a gear unit interposed between said drive motor and said milling cutter, wherein said gear unit is in the form of a cogwheel gearbox and comprises at least two gear pairings having different gear ratios, wherein the at least two gear pairings can be optionally engaged to form part of a drive connection or disengaged therefrom with a first clutch being assigned to a first of the at least two gear pairings and a second clutch being assigned to a second of the at least two gear pairings, wherein the act of closing one of the at least two clutches causes the respectively assigned first or second gear pairing to be engaged to form part of the drive connection and the other one to be disengaged therefrom so that the speed of the milling cutter can be varied during operation and under load.