Patent ID: 9080293
Filing Date: 2015-07-14
Classification: E01C,E01H,E21C

Abstract:
1. Self-propelled surface milling machine, having a mill roll ( 2 ) which is drivable about a rotational axis, and a mill roll drive ( 7 ) comprising at least one electrical motor ( 20 ) which is accommodated within the mill roll ( 2 ), stator ( 13 ) and rotor ( 12 ) of the electrical motor ( 20 ) being accommodated within an internal space ( 29 ) of a dust and air-tightly sealed motor housing ( 21 ) wherein a cooling device ( 24 ) comprising a closed circuit liquid cooling system ( 23 ) is associated with the at least one electrical motor ( 20 ) wherein the closed circuit liquid cooling system ( 23 ) includes circulation of a coolant through a closed loop, the mill roll ( 2 ) defining a front side positioned at an end of a longitudinal axis of the mill roll ( 2 ), wherein the circuit liquid cooling system (