Trench cutter

Abstract

The invention relates to a trench cutter having at least one pair of cutting wheels, at least one bearing plate on which the cutting wheels of a pair are rotatably arranged on the two sides of the bearing plate, a base frame on the underside of which the at least one bearing plate is attached, and a cutting wheel drive for driving the cutting wheels via a transmission lubricated with transmission oil in the bearing plate. According to the invention it is provided that at least one heat exchanger is arranged above the bearing plate and that for cooling the transmission oil, an oil circuit is formed to which the at least one heat exchanger is connected above the bearing plate.

1 . Trench cutter, comprising
 at least one pair of cutting wheels,   at least one bearing plate on which the cutting wheels of a pair are rotatably arranged on the two sides of the bearing plate,   a base frame on the underside of which the at least one bearing plate is attached, and   a cutting wheel drive for driving the cutting wheels via a transmission lubricated with transmission oil in the bearing plate,   characterized   in that at least one heat exchanger is arranged above the bearing plate, and   in that for cooling the transmission oil, an oil circuit is formed to which the at least one heat exchanger is connected above the bearing plate.   
     
     
         2 . Trench cutter according to  claim 1 ,
 characterized   in that the heat exchanger is designed as a panel which is fastened in a releasable manner on the base frame or on a holding device above the base frame.   
     
     
         3 . Trench cutter according to  claim 1 ,
 characterized   in that the cutting drive is arranged in a housing, and   in that the heat exchanger is designed in or on an outer wall of the housing.   
     
     
         4 . Trench cutter according to  claim 3 ,
 characterized   in that the outer wall of the housing is designed as a cooling wall, wherein to create an oil conducting channel on an inner side of the cooling wall, at least one groove is introduced in which a hose-shaped or tube-shaped line is arranged.   
     
     
         5 . Trench cutter according to  claim 1 ,
 characterized   in that the panel-shaped heat exchanger comprises a metal with high thermal conductivity, more particularly aluminium or an aluminium alloy.   
     
     
         6 . Trench cutter according to  claim 1 ,
 characterized   in that at least one pump device is provided via which the oil can be conveyed in the oil circuit.   
     
     
         7 . Trench cutter according to  claim 6 ,
 characterized   in that the pump device comprises a shaft driven by the cutting wheel drive, which shaft is provided with at least one conveying helix on its outer side.   
     
     
         8 . Trench cutter according to  claim 7 ,
 characterized   in that the shaft is the drive shaft which extends from the cutting wheel drive through the bearing plate to the cutting wheels.   
     
     
         9 . Trench cutter according to  claim 1 ,
 characterized   in that a control valve is provided which blocks an oil conveying channel of the oil circuit to the heat exchanger at a first low temperature and releases the oil conveying channel at a second higher temperature.   
     
     
         10 . Trench cutter according to  claim 1 ,
 characterized   in that at least two cooling walls are provided which are arranged on the long sides of the housing.