Self-propelled device for milling road surfaces

Abstract

The invention relates to a self-propelled device for milling road surfaces with a vertically adjustable chassis, which carries a steerable travelling mechanism with at least one steering wheel and a rear pair of wheels with individual wheel drives and a drive unit for them and for driving a milling unit which is coupled to the drive unit and comprises a milling roller which extends transversely to the travelling direction, has a width smaller than the width of the device and is arranged off-centre with respect to the device, the traction of at least one wheel being modified in a way corresponding to at least partial compensation for the moment acting about the vertical axis of the device during milling.

1 . A self-propelled device for milling road surfaces, comprising: 
 a vertically adjustable chassis, which carries a steerable travelling mechanism with at least one steering wheel and a rear pair of wheels;    a drive unit for driving individual wheel drives for the wheels; and    a milling unit which is driveably coupled to the drive unit and comprising a milling roller which extends transversely to the travelling direction of the device, the milling roller having a width smaller than the width of the device and is arranged off-centre with respect to the device;    wherein the traction of at least one wheel is modified in a way corresponding to at least partial compensation for the moment acting about the vertical axis of the device during milling.    
   
   
       2 . The device according to  claim 1 , wherein the traction of a rear wheel is modified in a way corresponding to at least partial compensation of the moment acting about the vertical axis of the device during milling.  
   
   
       3 . The device according to  claim 1 , wherein the traction of a front wheel is modified in a way corresponding to at least partial compensation of the moment acting about the vertical axis of the device during milling.  
   
   
       4 . The device according to  claim 1 , wherein at least one individual wheel drive has an adjusting device for the traction of the associated wheel for the at least partial compensation of the moment acting about the vertical axis of the device during milling.  
   
   
       5 . The device according to  claim 4 , wherein the individual wheel drives are hydraulic axial piston motors connected in parallel, at least one of which has an adjusting device for the traction of the associated wheel.  
   
   
       6 . The device according to  claim 5 , wherein the adjusting device comprises a hydraulically or electrically actuated valve.  
   
   
       7 . The device according to  claim 1 , wherein on one side of the device at least one individual wheel drive has a gear mechanism with a transmission which is different from the transmissions of gear mechanisms of at least two individual wheel drives of wheels on the other side of the device for at least partial compensation of the moment acting about the vertical axis of the device during milling.  
   
   
       8 . The device according to  claim 1 , wherein on one side of the device at least one wheel diameter is different from the wheel diameters of wheels on the other side of the device for at least partial compensation of the moment acting about the vertical axis of the device during milling.