METHOD OF IMPROVING TRACTIONAL-TOWING PERFORMANCE OF MACHINE-TRACTOR AGGREGATES WITH HINGED TILLAGE TOOL Russian patent published in 2013 - IPC A01B63/00 

FIELD: agriculture.

SUBSTANCE: method includes a specified distribution of load on the bearing surface of the tractor by changing the kinematic connection of links of the hinged system. For this, a hinged system in the form of the four-link chain of Chebyshev is used. The hinged system comprises a lower and upper thrusts pivotally attached with one ends on the connecting frame of the tool, and with the other on the tractor. The hinged system is made with the ability to form at the intersection point of the axes of upper and lower thrusts in the longitudinal vertical plane of the working instantaneous center of rotation of the four-link chain displaced in this plane relative to the point of the instantaneous center of rotation of the four-link chain corresponding to a balanced state of the system (power ratio), and characterised by the formation of moment of force. Depending on the type of the tractor used and rational process flow sheet of the distribution of load on its bearing surface, the desired direction and distance of the said displacement of the working instantaneous center of rotation is set prior to the start of the working phase of the aggregate. Providing by the appropriate adjustment of the four-link chain the given displacement, the desired point of the working instantaneous center of rotation is set. After that, during the working phase the power of either embedding or shanking out of the tool is activated relative to the set working instantaneous center of rotation with the ability of obtaining an adjustable tilting forward or backward moment of force changing the position X"рез" in relation ΔX"рез"=±PL/P"рез" where ΔX"рез" is displacement of the instantaneous center of rotation, P is force of thrust; L is shoulder of action of force of thrust; P"рез" is the reaction of surface.

EFFECT: method provides a specified distribution of load on the bearing surface of the tractor by changing the kinematic connection of links of the hinged system, the method enables to improve tractional-towing performance of machine-tractor aggregates with different types of tractors: both crawler and wheel.

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