RECUPERATIVE PNEUMOHYDRAULIC FIFTH-WHEEL COUPLING OF ROAD-TRAIN Russian patent published in 2020 - IPC B62D53/08 B60D1/24 

FIELD: transport machine building.

SUBSTANCE: invention relates to devices for coupling semitrailer with tractor. Recuperative pneumohydraulic fifth-wheel coupling comprises two semi-trailers arranged in semitrailer frame between its crosswise front and rear beams, a body consisting of a support plate, from below of which there fixed is a pin, hydraulic cylinders fixed parallel to each other on a support plate between longitudinal plates, with their bottoms resting against braces. Free ends of hydraulic cylinders rods are supported by bushings on front and rear bars. Head ends of hydraulic cylinders are connected via pipeline to the first pneumohydraulic accumulator. Rod ends by means of pipeline communicate with hydraulic tank by means of check valve and suction pipeline, and with second pneumohydraulic accumulator by means of check valve and pressure pipeline. By means of pressure pipeline the second pneumohydraulic accumulator is connected both with hydraulic tank by means of adjustable safety valve, and with port of working fluid supply to consumer by means of controlled reduction valve.

EFFECT: broader functional capabilities of the fifth-wheel coupling device of the road train and higher efficiency of its operation.

1 cl, 4 dwg