| 摘要 |
A mechanism of change of the crane radius with horizontal load displacement contains a trunk, a counter-trunk, rigid stay, a load rope and an jib, a polyspast of the jib lifting fixed by one unit type holder to the jib, and by the second unit type holder - to the fixed post. The free end of the rope of polyspast through bypass blocks is brought to the surface of non-cylinder drum executed in the form of hollow hyperboloid connected with electric motor through the reducer and brake mounted between the reducer and the drum.
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