| 摘要 |
<p>Header for a harvesting machine provided with means for automatic elevation of the feeding part of the header if the cutter assembly runs into the ground or some other stationary obstruction, characterized in that it comprises a stationary table (1), which when in operation is stationary in relation to the harvester (7); a mobile feeding apron (2), the gables of which being integrated with the front parts (16) of a pair of levers (18), said levers being hinged to the stationary table about a first horizontal turning axis (10) and balanced by a hydraulic system including a pair of hydraulic cylinders (20, 20A, 20B); a second horizontal turning axis (35) at the front end of the feeding apron, about which axis the cutter assembly (3) is balanced and pivots; detectors (38), arranged to signal if the cutter assembly is turned upwards a certain angle about said second turning axis; and regulating means (51, 52, 53, 54), designed to activate said hydraulic cylinders when receiving a signal from said detectors, thus causing the levers to turn about said first turning axis and thereby to raise the feeding apron, the cutter assembly thus clearing the obstruction.</p> |
