AUTOMATICALLY MOUNTABLE TOWER LIFTING CRANE WITH BOOM SIDEWISE FOLDED FOR TRANSPORTATION Russian patent published in 2002 - IPC

FIELD: mechanical engineering; tower cranes. SUBSTANCE: invention relates to automatically mountable tower lifting crane with foldable load-lifting boom formed by hinge-connected members. Proposed tower lifting crane has load- lifting boom 6 consisting of at least three members 7, 8, 9 and intermediate boom folding member 10 connecting base 7 of boom 6 with second member 8 of boom 6. Intermediate member consists of rear part 15 and front part 16 of pyramidal shape with rectangular base hinge-connected in points 20, 30 with base 7 of boom 6 and with second member 8 of boom 6 level of lower load- bearing beams 21, 31, hinge joint with vertical turning axis which connects said rear part 15 and front part 16 of intermediate member, this axis being displaced sidewise, and temporary coupling means. These means are designed for connecting rear part 15 of intermediate member 10 with front part 16 of intermediate member in working position of said tower lifting crane. EFFECT: facilitated transportation of crane along motor roads in folded position. 4 cl, 10 dwg