CRANE-MANIPULATOR SET LOAD-LIFTING BOOM Russian patent published in 2001 - IPC

FIELD: lifting and transport engineering. SUBSTANCE: proposed load-lifting boom has lifting section 5 arranged on post of slewing gear for angular displacement in vertical plane. Lifting section 5 has articulated telescopic boom 9 with cylinders of hydraulic drive of telescopic sections to provide compensating joint ensuring free travel of indicated sections relative to hydraulic cylinders in side direction. Load-lifting boom has also mechanical extension with working member secured on its end. Mechanical extension is moved out of closing section of telescopic boom. Bar and connecting elements are provided in boom structure. Flat guides made of polymeric antifriction material are installed between sections of telescopic boom and mechanical extension. Stop limiting longitudinal displacement of guides under action of operating loads are installed at both sides of guides. Hydraulic line fasteners are installed on sections of telescopic boom. Fixed section of telescopic boom has clamp for fixing load-gripping hook in traveling position. EFFECT: improved performance characteristics, enhanced reliability. 63 dwg