FIELD: mechanical engineering.
SUBSTANCE: invention is relevant to boom equipment of load-lifting cranes and manipulators. Mechanism for boom lifting includes hydro-cylinder of lifting, which is hinge-connected to column and to boom with the aid of rollers suitable for rolling in sliding guides of column and boom, and provided with rod rigidly connected to it at right angle. The said rod is provided with turning axis coinciding with hinge axis, which connects column and boom to rod at right angle; and the said rod is provided with turning axis coinciding with hinge one, which connects column and boom to rod. Length of rod is equal to one of arm of load applied to guide bar upon optimal position of hydro-cylinder.
EFFECT: invention provides boom lifting upon constant angular speed and optimal position of hydro-cylinder with minimal load applied to guide bar when boom is lifted at specified angle respectively, dynamic loadings do not occur, and power spending is lowered It allows increasing reliability of boom machinery of load-lifting cranes and manipulators.
1 dwg
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