RECUPERATIVE SPRING-HYDRAULIC COUPLING DEVICE OF A SINGLE-ACTING 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 regenerative spring-hydraulic coupling of a single-acting road train is installed between the car and the trailer. The body of the device is rigidly fixed in the drawbar, and inside the body, coaxially to it, a hydraulic cylinder is placed. The hydraulic cylinder is made single-acting with a double-sided rod, a piston and the supply of working fluid through a double-sided rod using a channel. At the front end of the double-sided rod, the front casing is rigidly mounted, and at the rear end of the double-sided rod, the rear casing is rigidly installed. Front and rear compression springs are placed between the front and rear casings rigidly mounted on a double-sided rod and the annular partition. The hydraulic system of the device includes a pneumohydraulic accumulator, a hydraulic tank, flexible, suction and pressure pipelines, check and safety valves and a port for connecting a recuperated working fluid to a consumer.

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

1 cl, 2 dwg