| 摘要 |
FIELD: agriculture, road machinery. ^ SUBSTANCE: invention can be used in wheeled self-propelled machines and tractors operating in assembly with semi-mounted machines, semi-trailers and trailers. Proposed traction-and-transport vehicle has frame, driven and ands driving axles with steerable front and driving rear wheels, engine, hydrostatic transmission, makeup pump, hydrostatic steering gear, shoe brakes on driving wheels equipped with wheel brake cylinders, and hydraulically operated mounting with hitch in form of fork with pivot. Wheel brakes are made with separate control circuits, each consisting of master cylinder communicating with wheel brake cylinder, servocylinder whose piston space communicates with output of control valve, one of inputs of control valve and rod space of servocylinder being communicated with pressure main line of makeup pump, and second input being placed in communication with hydraulic tank. Control valve spool is mechanically coupled with brake pedal, and rod of servocylinder, with piston of master cylinder. Hitch is furnished with pivot lifting and lowering hydraulic cylinder. Power hydraulic cylinders of mounting is controlled by hydraulic unit including safety valve and three-position four-line distributor. Pivot lifting and lowering hydraulic cylinder is hydraulically coupled with two-position four-line electrically-controlled distributor. ^ EFFECT: improved maneuverability and cross-country capacity of vehicle, reliability of running and increased utilization factor of delivery of pump of mounting and steering gear hydraulic system. ^ 2 cl, 2 dwg |
