TOWER CRANE Russian patent published in 2013 - IPC B66C23/26 

FIELD: transport.

SUBSTANCE: invention relates to cranes. Tower crane comprises running gear, rotary platform arranged thereat, cargo winch, counterweight and tower mounted thereat and equipped with assembly set for tower extension. Boom, spacer and strut arranged there between and articulated with assembly tackle first link are articulated with tower top. Said spacer is articulated with assembly tackle second link connected with said first link in the crane operating position and disengaged therefrom in the crane assembly position. Strut is coupled with spacer by tackle so that in assembly position one set of tackle blocks is articulated with first link free end while second set is articulated with spacer free end. Tackle rope in the crane assembly position is connected with cargo winch. Strut-to-tower top hinge joint is located at tower top section rear. Tower extending part with boom-to-tower joint is located at tower top part front. Thrust is secured at tower top section upper side to contact with strut in the cane assembly position while spacer is equipped with thrust to contact with tower top section in assembly position. Assembly set has platform to contact with boom lower side in assembly position.

EFFECT: simplified ad safe crane assembly/disassembly.

2 cl, 4 dwg