TOWER CRANE MOBILE SUPPORT FRAME Russian patent published in 2009 - IPC B66C9/00 B66C5/10 

FIELD: mechanics.

SUBSTANCE: proposed tower crane mobile support frame comprises central part with upper and lower sheets, backup ring with holes, and frame bracket supports linked up with the frame central part with the help of swivel pivots and braces. The frame central part incorporates cross box-like beams. Conical spacers are arranged between replaceable box-like beams and rigidly jointed thereto. Stiffness ribs are vertically attached to each of previously mentioned spacer, at its top part and along the frame perimetre. Every previously mentioned conical spacer and vertical walls of each beam are rigidly jointed to the said upper and lower sheets. Every stiffness rib is located between the said backup ring holes. The frame central part and bracket supports are furnished with interacting stops. The frame is furnished with ring rigidly attached to upper sheet, the said ring being provided with stiffness ribs attached to the ring along its outer. Every rib has its end face is rigidly jointed to upper sheet. Aforesaid backup ring is located on stiffness rib top end face and rigidly connected thereto. Recesses are made between adjacent ribs, backup ring and upper sheet. Aforesaid recess shape matches that of backup ring.

EFFECT: frame higher strength, simpler assembly and servicing.

6 dwg