CONTROL OF WORKING AND TRANSPORT POSITIONS OF CUTTING WHEEL OF MACHINE FOR BAND TREATMENT AND SOWING SOIL AND COVER THEREOF

摘要

Control of both the transport and working positions of soil-working wheels (9) is ensured by a device, which accomplish the following functions; lifting, blocking of position of a pivoted arm (8) carrying the soil-working wheels (9), equalizing pressure of working implements and a supporting arm onto the worked soil and regulation of a furrow depth. The lifting device (13) and the equalizing device (15) are mounted on an auxiliary frame (24). The lifting device (13) includes a hydraulic control cylinder (25) being coupled through the mediation of a pull rod (28) with a control lever (10) attached to the pivoted arm (8). Blocking of transport position, at which the pivoted arm (8) bears in its upper position against a bottom stop (40), is achieved by a swing pawl (43), bearing against top surface of said pivoted arm (8) nose (38), secured by a safety pin (44) and a blocking lock (12). Said equalizing device (15) including a two-armed lever (30) being coupled by its one end with the hydraulic cylinder (25) and by its other end with a servo spring (16) attached to an adjusting screw (34), regulates pressure of the pivoted arms (8) with the soil-working wheels (9) onto the worked soil. A cover (17) of the soil-working wheel (9) is provided with a parallelogram that enables copying of terrain surface during machine movement and through its open cover (60) it further enables return of the removed soil back into the furrow just produced.