FIELD: mechanical engineering.
SUBSTANCE: invention relates to lifting devices. A lifting crane includes a main boom and a rear mast, at least one of which contains an upper part of the first mast, containing at least one section of the mast, and a lower part of the first mast, containing at least one section of the mast, and a tilting section of the first mast. The tilting section of the first mast is located between the upper part of the first mast and the lower part of the first mast and is made with the possibility to be in a state for lifting a load with a straight boom, in which the upper part of the first mast and the lower part of the first mast are located essentially in line with each other, and in a state for lifting a load with a boom break, in which the upper part of the first mast is tilted relatively to the lower part of the first mast.
EFFECT: increase in the distance of the counterweight from the middle of the crane is achieved.
28 cl, 9 dwg
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