| 摘要 |
A vehicle having three or more wheels, supporting substantially all of the vehicle weight on its wheels, for removing a traffic marking from a road surface, has a vertically floating head cutter mechanism comprising a mounting shroud having an open bottom and being suspended from the vehicle in substantially vertically movable relation with respect to the vehicle by two or more vertical guides. The vertical guides define upper and lower limits of vertical travel of the mounting shroud and are dimensioned and otherwise adapted to locate the mounting shroud in an operative intermediate position between the upper and lower limit positions. First and second cutter head assemblies are operatively mounted within the mounting shroud adjacent the open bottom for counter-rotation about respective first and second axes, which axes are preferably canted from zero degrees to ten degrees to the vertical. Hydraulic drive motors are operatively connected to the first and second cutter head assemblies for causing the counter-rotation thereof. Biasing springs and hydraulically actuated cylinders are interconnected between the mounting shroud and the vehicle for biasing the mounting shroud towards the lower limit position and for resiliently urging the first and second cutter head assemblies into cutting engagement with the road surface through the open bottom of the mounting shroud, with a substantially constant cutting force applied by each cutter head assembly to the road surface irrespective of irregularities encountered in the road surface as the vehicle moves therealong. |
