FRONT LIFTING DEVICE FOR AN AGRICULTURAL MACHINE AND ASSOCIATED CONTROL METHOD

摘要

The invention relates to a device for hitching and lifting an agricultural tool, comprising a frame (1) intended to be fastened to the agricultural machine, at least one first arm (2) that is articulated on the frame and comprises a first tool hitching means (8) at one of its ends, at least one first jack (4), of which one of the elements, cylinder or rod, is connected to the frame while the other element, rod or cylinder, is connected to the arm, said jack making it possible to move the arm such that the extent of the travel of the jack allows the end of the arm bearing the hitching means to successively pass through a first position, referred to as the "minimum low position", a second position, referred to as the "maximum high position", and a third position, referred to as "retracted", of the supply means (9, 10) of the jack, means (C) for detecting the position of the end of the arm that are able to deactivate the supply means of the jack when the end of the arm has reached the second position, and a bypass controller (R) for bypassing the controller of the detection means that is able to reactivate the supply means of the jack. A further subject of the invention is a method for controlling such a device.