ADJUSTMENT DEVICE OF POSITION OF BALLAST WEIGHT ON TRACTOR SEMI-FRAME Russian patent published in 2012 - IPC A01B63/00 B62D49/08 

FIELD: machine building.

SUBSTANCE: adjustment device of ballast weight position includes transmitter of tractor front axis (1) unloading. Transmitter is made in the form of an electric force-measuring pin with electronic control unit (2), into which the required sensitivity level of front axis (1) unloading transmitter is programmed. When the tractor front axis is unloaded above allowable level, transmitter supplies the signal to electronic control unit that generates a control signal and supplies it to electric hydraulic valve (10). Electric hydraulic valve is connected on one side to hydraulic cylinder (7), and on the other side via hydraulic lines (12) and (13) to pressure line of hydraulic system of tractor and drain line. Depending on the signal supplied to electric hydraulic valve (10), hydraulic cylinder (7) connected to it moves beam (4) with ballast weight (6) now in tractor movement direction, and then to initial position.

EFFECT: invention allows increasing the stability of straight-line movement, improving the controllability of hinged tractor unit, improving the uniform distribution of vertical loads on supports of the unit and improving sensitivity of the system actuation.

2 cl, 3 dwg