Bush cutter grinding unit has articulated arm acted upon by oscillating couples and orientation actuator sending fluid to accumulator which on couple cessation returns fluid to actuator and grinder set to nominal orientation

摘要

The grinding unit (2) of a bush cutter with an articulated arm (22) is acted upon during working by oscillating couples tending to pivot around a frame pivot (5). The piston (8) of the frame (6) orientation actuator is then subjected by rotation of the grinding unit to a translation force which allows the sending of pressurized hydraulic fluid to a hydraulic accumulator (23,24). When the oscillation couple ceases, the hydraulic fluid contained in the accumulator is sent back to the frame orientation actuator in order to bring back the piston to its initial position whilst the grinder set regains its nominal orientation.