REGENERATIVE PNEUMOHYDRAULIC COUPLING DEVICE OF A ROAD TRAIN Russian patent published in 2022 - IPC B60D1/14 B60D1/145 B60D1/155 

FIELD: trailer with a tractor coupling.

SUBSTANCE: invention relates to devices for coupling a trailer with a tractor. The recuperative pneumohydraulic coupling device of the road train contains shock-absorbing and recuperative mechanisms. In the drawbar, a housing with a bottom and with a hydraulic cylinder placed in it is rigidly fixed. Inside the hydraulic cylinder, a sealed partition is made, dividing the hydraulic cylinder into two hydraulic cylinders - shock-absorbing and recuperative mechanisms. Pistons with rods are placed in each of the hydraulic cylinders, in which the free end of the damping mechanism hydraulic cylinder rod is rigidly connected to the connecting ring, and the free end of the recuperative mechanism hydraulic cylinder rod is rigidly connected to the bottom of the cylindrical housing. The damping mechanism includes a pneumohydraulic accumulator connected to the rod end of the damping mechanism hydraulic cylinder. The recuperative mechanism includes a piston cavity of the hydraulic cylinder of the recuperative mechanism, which communicates with both the hydraulic tank and the pneumohydraulic accumulator. The pneumatic-hydraulic accumulator is connected both to the hydraulic tank and to the connecting port of the consumer of the recuperated working fluid.

EFFECT: weight reduction and simplification of the design of the recuperative mechanism is achieved.

1 cl, 4 dwg