FIELD: agriculture.
SUBSTANCE: invention relates to the field of agriculture, namely, tractor semitrailers, used as part of beetroot-lifting devices. Tractor semitrailer comprises a frame (1) on the axis (3) with wheels, a platform (4) pivotally connected to the frame (1), and a telescopic hydraulic cylinder (12) of tilting the platform (4), an elastic accelerator (7) of tilting the platform (4), a winch (10) and a hydraulic motor (13). Rope (11) of the winch (10) is moored at the bottom of the platform (4), the shaft of the hydraulic motor (13) is connected to the winch (10). The input-output channels of the hydraulic motor (13) are connected with the pump (18) through two-way hydraulic lock (14) and a hydraulic distribution valve (17). In front of the two-way hydraulic lock (14), a check valve (15) is mounted, between the input-output channels of the hydraulic motor (13) a unilateral hydraulic lock (14) is mounted for transfer oil between the input-output channels of the hydraulic motor (13). The elastic accelerator (7) is made in the form of a set of springs with rubber springs (8) mounted on the frame along its length, which are pressed by the action of the rope (11) of the winch (10), providing together with the hydraulic cylinder (12) of tilting the platform (4).
EFFECT: invention enables to reduce the time of discharge cycle - lowering the platform.
2 dwg
