RACK JACK DRIVE Russian patent published in 2024 - IPC B66F1/08 

FIELD: lifting and transport mechanisms.

SUBSTANCE: used in operations on lifting and lowering piece goods. The rack jack drive contains a carriage consisting of two bearing plates separated from each other by at least one cylinder with a rod connected to them, operation without jamming, which is ensured by a pair of support rollers installed on one bearing plate between a stop mounted on the other bearing plate. A fixed rail is inserted into the coaxial openings of the load-bearing plates, between a pair of their support rollers, which ensure a stable position of the carriage from the impact of the load. On the sides of the racks facing the rollers, they are made with the same hole pitch, equal to the stroke of the cylinder rod. Opposite the holes in the cavities of each of the supporting plates, oppositely located one relative to the rack, a pawl is mounted, hingedly connected to the cylinder rod, with the possibility of engagement with the rack.

EFFECT: cyclic coherence of the operation of the cylinders with the rods is ensured due to the distributors, “OR” logical elements, time delay valves and a short pulse former connected to them via pipelines for transmitting the working fluid from the source.

1 cl, 4 dwg