he cantilever tip of the cantilever is extended

Mobile crane boom , boom box structure ( telescopic boom ) and the lattice structure cantilever ( patch cantilever ) . Mobile crane boom picture , lightweight, high -tension steel plates are used. High tensile steel , manganese , nickel, chromium and molybdenum strengthen low-carbon low-alloy and high welding, machining , excellent corrosion resistance . A boom, hanging under its own weight and the bending moment of goods , the compression force , the rotating lateral load , wind load and other considerations is designed generally to the rated working load appropriate electric platform stacker strength can be maintained. However, the shock load ratio exceeds the design load conditions and bending damage , may arise.
box structure cantilever ( telescopic boom )
Hydraulic cranes and other off-road truck cranes and boom , boom box- type structure strength . To use. Internal cantilever , hydraulic cylinders and cantilever retractable cable Luo - group or chain to have a combination of telescopic mechanism . Cantilever retractable cable Luo - group or chain with something , retractable electric pallet jack telescopic boom cylinder use , so that after the boom is telescopic . Typically , 2 ? 6 section telescopic hydraulic , 2 , 3 , 4 and sequential turn retractable telescopic manner scalable layers while simultaneously stretching mode . In addition, the simple way retractable pin mechanism sky . Simple sky pin mechanism , usually in different ways , a book each sliding inside a hydraulic cylinder cantilever boom fixing pin , while the telescopic boom so that the lock sequence method .
Most of the box structure cantilever , the cantilever tip of the cantilever is extended. Grants can arm mounting . Auxiliary boom installed , orientation and subsidies if the mounting angle boom boom boom of less than 45 ° is necessary . Raise performance, and subsidies boom boom tilt angle mounting angle separately. Link cantilever equipped with a coarse stuff , subsidies cantilever mounting angle (tilt angle ) and the longitudinal direction of the cantilever within 5 ~ 45 ° hydraulic cylinders , etc. can be set freely