VEHICLE Russian patent published in 2012 - IPC B62D55/04 B62D55/30 

FIELD: transport machinery.

SUBSTANCE: this vehicle contains a framework, guided front wheels connected to a steering shaft, back driving wheels equipped with a semicrawler unit at each sideboard. The semicrawler unit includes a crawler, an idler wheel mounted on a balancer, and hydraulic control system of the idler wheel. Hydraulic system includes two-sheet hydraulic cylinders guided by on/off distribution valves, and hydraulic lines connecting hydraulic cylinders sheets to the distribution valves. Above-piston hydraulic cylinder sheets are equipped with shock springs. Distribution valves are controlled by a spring-return jaw, and are connected to a master form moved by a vehicle steering shaft. Hydraulic system is equipped with pump and pressure flap, as well as pump and drain pressure hydraulic lines. Each on/off distribution valve has four ports. First line is connected to pump delivery section, the second line is connected to drainage, the third line is connected to the above-piston hydraulic cylinder sheet, and the fourth line is connected to the hydraulic cylinder rod side. In its first position, the third line of the distribution valve is connected to the forth interconnecting hydraulic line. In its second position, the first line of the distribution valve is connected to the forth interconnecting hydraulic line, and its second line is connected to the third interconnecting hydraulic line. The master form is formed by two peripheral pits located symmetrically to its central axis.

EFFECT: enhanced vehicle manoeuvrability.

3 dwg