Construction machine

Abstract

A self-propelled construction machine includes a machine frame supported by travelling devices, a working device mounted to pivot relative to the machine frame, in particular milling/mixing rotor, for working the ground, a driving device, in particular a drive engine, for driving at least the working device and preferably the travelling devices, at least one first operating device and at least one second operating device, which are each connected to the working device and the machine frame, wherein the working device is pivotable relative to the machine frame by adjusting the operating devices. It is provided that a controller is designed to control the adjustment travels of the operating devices in such a manner that the adjustment travels of the first operating device and the second operating device exhibit a defined difference to each other.

1 . A self-propelled construction machine, comprising:
 a machine frame;   a plurality of traveling devices configured to support the machine frame from a ground surface;   a milling/mixing rotor for working the ground surface, the milling/mixing rotor being pivotable about a pivoting axis relative to the machine frame;   a drive engine configured to drive the milling/mixing rotor;   first and second actuators connected to the milling/mixing rotor and the machine frame to pivot the milling/mixing rotor about the pivoting axis relative to the machine frame by adjusting an adjustment travel of each the actuators; and   a controller configured to control the adjustment travels of the first and second actuators such that the adjustment travels of the first and second actuators have a defined difference to each other.   
     
     
         2 . The self-propelled construction machine of  claim 1 , further comprising:
 a first sensor associated with the first actuator to detect the adjustment travel of the first actuator and to generate a first adjustment travel signal to be transmitted to the controller; and   a second sensor associated with the second actuator to detect the adjustment travel of the second actuator and to generate a second adjustment travel signal to be transmitted to the controller.   
     
     
         3 . The self-propelled construction machine of  claim 2 , wherein:
 the controller is configured to receive the first and second adjustment travel signals from the first and second sensors and to transmit control signals to the first and second actuators to control the adjustment travels of the first and second actuators at least in part in response to the first and second adjustment travel signals.   
     
     
         4 . The self-propelled construction machine of  claim 1 , further comprising:
 at least one mechanical power transmission configured to transmit driving power from a driven shaft of the drive engine to the milling/mixing rotor.   
     
     
         5 . The self-propelled construction machine of  claim 4 , wherein:
 the mechanical power transmission includes at least one belt drive.   
     
     
         6 . The self-propelled construction machine of  claim 4 , further comprising:
 a pair of pivoting arms pivotally connecting the milling/mixing rotor to the machine frame so that the milling/mixing rotor is pivotable with the pivoting arms about the pivoting axis relative to the machine frame; and   wherein the mechanical power transmission is pivotable about the pivoting axis with the milling/mixing rotor.   
     
     
         7 . The self-propelled construction machine of  claim 4 , wherein:
 the pivoting axis is arranged parallel to the drive shaft of the drive engine.   
     
     
         8 . The self-propelled construction machine of  claim 4 , wherein:
 the pivoting axis is arranged co-axially to the drive shaft of the drive engine.   
     
     
         9 . The self-propelled construction machine of  claim 1 , further comprising:
 a plurality of lifting columns connecting the machine frame to the plurality of travelling devices, such that the machine frame is adjustable in height relative to the travelling devices by adjusting the lifting columns, wherein the lifting columns are configured to be operable such that a transverse and/or longitudinal inclination of the machine frame is adjustable by adjusting the lifting columns.   
     
     
         10 . The self-propelled construction machine of  claim 1 , wherein:
 the controller is configured to control the adjustment travels of the first and second actuators such that the defined difference in the adjustment travels of the first and second actuators is zero.   
     
     
         11 . The self-propelled construction machine of  claim 1 , wherein:
 the controller is configured to control the adjustment travels of the first and second actuators synchronously.   
     
     
         12 . The self-propelled construction machine of  claim 1 , wherein:
 the first and second actuators each include a respective first part adjustable in relation to a respective second part, the respective first part being connected to the milling/mixing rotor and the respective second part being connected to the machine frame, wherein the respective first parts of the first and second actuators are connected to one another solely by the milling/mixing rotor.   
     
     
         13 . A method of producing pavements by stabilizing soils of insufficient load-bearing capacity or by recycling road surfaces with a self-propelled construction machine, comprising:
 working a ground surface with a milling/mixing roller pivotally mounted to a machine frame of the construction machine;   driving the milling/mixing rotor with a drive engine;   pivoting the milling/mixing rotor relative to the machine frame with first and second actuators; and   controlling an adjustment travel of each of the first and second actuators with a controller such that the adjustment travels of the first and second actuators are different from each other.   
     
     
         14 . The method of  claim 13 , further comprising:
 detecting the adjustment travels of the first and second actuators with first and second sensors; and   transmitting detected values of the first and second adjustment travels from the first and second sensors to the controller.   
     
     
         15 . The method of  claim 14 , wherein:
 the controlling step further includes controlling the adjustment travel of each of the first and second actuators as a function of the detected values of the first and second adjustment travels and a predefined difference in the adjustment travels.   
     
     
         16 . The method of  claim 13 , further comprising:
 at a different time from the controlling step, further controlling the adjustment travel of each of the first and second actuators such that a predefined difference in the adjustment travels of the first and second actuators is zero.   
     
     
         17 . The method of  claim 13 , wherein:
 the controlling step further includes controlling the adjustment travel of each of the first and second actuators synchronously.