HITCH LINKAGE OF TRACTOR Russian patent published in 2017 - IPC A01B59/06 

FIELD: agriculture.

SUBSTANCE: invention relates to the field of tractor mechanical engineering. The hitch linkage of the tractor for aggregation comprises a connecting frame with an agricultural tool, predominantly plow. The Chebyshev four-link mechanism transfers the load from the tool to the tractor. The upper and lower links of the four-link chain are hingedly connected with one ends on the tractor, and the other ends on the connecting frame of the tool. The hydraulic system of the tractor is connected to the power lift hydraulic cylinder and the control means of the tool position and adjustment of the tillage depth. The hitch linkage is provided with two locking assemblies of the Chebyshev four-link chain, mounted on the tractor on the sides, with the working position of the tool, each of which is made ratchet-type and consists of a ratchet wheel. The ratchet wheel is fixed to the hinge axis of the lower link corresponding to it and a stop interacting with it, fixed to the tractor rear axle housing with the ability of rotation relative to mounting axis using the drive hydraulic cylinder. The cavities of the drive hydraulic cylinders are connected hydraulically to the main lifting hydraulic cylinder cavities so that when the operating lowered position of the tool a constant power contact of the stops with the ratchet wheels is provided, and when lifting of the tool the stops are out of contact with the ratchet wheels.

EFFECT: invention provides improvement of the traction-linking characteristics.

2 cl, 1 dwg