METHOD AND DEVICE FOR INCREASING LOAD ON DRIVE REAR WHEELS OF TRACTORS DURING CULTIVATION OF SOIL Russian patent published in 2019 - IPC A01B59/06 A01B63/10 A01B63/114 A01B76/00 B62D49/06 

FIELD: agriculture; machine building.

SUBSTANCE: group of inventions relates to agricultural machine building. Method for increasing load on drive rear wheels of tractor during cultivation of soil with a tool, in particular a plow connected to three-point hitch device of tractor, in which vertical position of tool attached to tractor, is controlled relative to tractor by means of lever position of lifting device, and length of upper link of three-point hitch device of tractor is adjusted. After adjusting the length of the upper link of the three-point attachment of the tractor, determining the axial force acting / induced in the upper link, and during the tractor movement, it is constantly monitored and automatically maintained at the specified level, due to which also adjustable vertical position of tool attached to tractor is constantly monitored, as well as automatically continuously maintained at a given level, thereby maintaining by this adjustment the vertical position of the attached implement and, therefore, maintaining a constant depth of plowing. Device for increasing load on drive rear wheels of tractor during cultivation of soil with agricultural implement, in particular a plow, comprises three-point hitch device of tractor, equipped with position sensor of vertical position of levers of lifting device, due to which upper link of three-point hitch device of tractor is formed at least on part of its length by hydraulic cylinder of double action. Double action hydraulic cylinder passes through the space above the piston, under the piston connected to the control hydraulic distributor, and through it to the hydraulic generator outlet and to the working fluid reservoir, due to which control hydraulic distributor for control is connected to control unit, with inputs of which are connected output of means of monitoring axial force in upper link of three-point hitch device of tractor and output of position sensor of vertical position of levers of lifting device of three-point hinged device.

EFFECT: elimination of fluctuations of plowing depth, reinforcement of tractor back driving axis and achievement of uniform load distribution between rear wheels of tractor.

8 cl, 5 dwg