| 摘要 |
FIELD: mechanical engineering. ^ SUBSTANCE: invention relates to tower cranes with distributing boom, i.e. crane boom. Proposed layout of load-distributing ropes for tower crane with folding boom 10 includes two or several series-connected members made in form of base 12 of boom and head part 13 of boom hinge-connected to each other. First rope 39 has one end secured on one side of winding drum of 37 of load-distributing winch, and other end is secured on load trolley 11 of boom. Rope 39 passes through tensioner 48 installed on base 12 of boom and containing hinge-mounted lever 45 with sheave 44 exposed to action from side of air spring 29. Second rope 40 has one end secured on other side of winch drum 37 and second end secured on drum located on load trolley 11. Rope 40 passes through length compensating system consisting of combination of sheaves arranged in area of hinge joint 18 of base 12 of boom and head part 13 of boom. ^ EFFECT: improved layout of load-distributing ropes with tensioner. ^ 4 cl, 5 dwg |
