Ground surface cutting device

Abstract

The invention relates to a ground surface cutting device comprising: a cutting motor for rotationally driving a cutting tool; an advancing device for displacing the cutting tool with an advancing speed relative to the ground surface, and; a rotationally speed measuring device for measuring an actual value for the rotational speed of the cutting tool or of the cutting motor. The actual value is evaluated by a control device and is compared with a predetermined set value. The control device controls the advancing device and changes the advancing speed based on a variation of the actual value from the set value.

1 - 10 . (Cancel)  
     
     
         11 . A ground cutting device, comprising: 
 a travelling mechanism;    a cutting motor supported by the travelling mechanism for rotationally driving a cutting tool; and having    an advancing device for moving the cutting tool at an advancing speed relative to the ground;    wherein    a rotational speed measuring device for measuring an actual value of the rotational speed of the cutting tool or of the cutting motor, and by    a control device for comparing the actual value measured by the rotational speed measuring device with a predetermined desired value, and for changing the advancing speed in dependence upon a deviation from the actual value and desired value.    
     
     
         12 . A ground cutting device as claimed in  claim 11 , wherein the control device is formed in such a manner that it reduces the advancing speed if the actual value of the rotational speed is less than the desired value and that it increases the advancing speed if the actual value is greater than the desired value.  
     
     
         13 . A ground cutting device as claimed in  claim 11 , wherein the desired value can be changed manually in dependence upon operating parameters, wherein the operating parameters are parameters from the group including the material which has been cut, the efficiency of the cutting tool, the cutting depth, the nominal rotational speed of the cutting motor.  
     
     
         14 . A ground cutting device as claimed in  claim 11 , wherein the travelling mechanism can be displaced relative to the ground by the advancing device.  
     
     
         15 . A ground cutting device as claimed in  claim 11 , wherein the advancing device comprises an advancing motor which can be actuated by the control device.  
     
     
         16 . A ground cutting device as claimed in  claim 11 , wherein the control device can be switched off and the advancing speed can be adjusted either by manually pushing the ground cutting device or manually specifying an advancing speed desired value for the advancing device.  
     
     
         17 . A ground cutting device, comprising: 
 a travelling mechanism;    a cutting motor supported by the travelling mechanism for rotationally driving a cutting tool; and having    an advancing device for moving the cutting tool at an advancing speed relative to the ground;    wherein    a power measuring device for measuring an actual value of the power of the cutting tool or of the cutting motor or of a parameter which is dependent upon the power or corresponds to the power; and by    a control device for comparing the actual value measured by the power measuring device with a predetermined desired value, and for changing the advancing speed in dependence upon a deviation from the actual value and desired value;    wherein    the cutting motor comprises a rotational speed control device and/or a rotational speed limiting device, of which the control activity can be evaluated by the power measuring device for the purpose of determining the actual value of the power of the cutting motor.    
     
     
         18 . A ground cutting device, comprising: 
 a travelling mechanism;    a cutting motor supported by the travelling mechanism for rotationally driving a cutting tool; and further comprising    an advancing device for moving the cutting tool at an advancing speed relative to the ground;    wherein    a rotational speed measuring device for measuring an actual value of a parameter which is proportional to the rotational speed of the cutting tool or of the cutting motor; and by    a control device for comparing the actual value measured by the rotational speed measuring device with a predetermined desired value, and for changing the advancing speed in dependence upon a deviation from the actual value and desired value;    wherein    the cutting motor is an internal combustion engine;    the parameter proportional to the rotational speed is an ignition stroke of an ignition device for the cutting motor, and wherein    the rotational speed measuring device is formed for the purpose of measuring the actual value with the aid of the ignition stroke.