FIELD: transportation.
SUBSTANCE: invention relates to devices for coupling of trailer with tractor. Road-train pneumatic-hydraulic tow hitch comprises a cylinder body, a hydraulic tank, an adjustable safety valve, pipelines, a pneumatic hydraulic accumulator, recuperative and damping mechanisms located inside the cylinder body, coaxially made movable cylinder in the form of a cup with the end made in the wall on its surface longitudinal along the axis of the movable cylinder through slots and bent inwards by the collar, one-side hydraulic cylinder coaxially placed into the movable cylinder, on the outer surface of which on the bottom side there are limiters, and inside it there are arranged a piston with a rod made at the same time. Cylinder housing has a collar bent inward at one end and with fixed limiters on the other end and is rigidly fixed in the drawbar.
EFFECT: broader functional capabilities of the device and high efficiency of operation thereof.
1 cl, 6 dwg
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