Large-tonnage lorry-mounted crane

Abstract

The invention relates to a large-tonnage lorry-mounted crane which comprises a base, a lifting hook, an oil tank, a hydraulic control system, a support leg assembly, a swing mechanism, a first amplitude transformation mechanism, a second amplitude transformation mechanism and a telescopic arm assembly, wherein the support leg assembly comprises two horizontal telescopic support legs, two vertical telescopic support legs and two turnover sliding plates; the swing mechanism comprises a swing hydraulic motor, a planet gear reducer, and a swing support with an inner ring fixed on the base; the first amplitude transformation mechanism comprises a main arm, a connecting rod I, a connecting rod II and a first amplitude transformation cylinder; the second amplitude transformation mechanism comprises a second amplitude transformation cylinder connected to the main arm, a connecting rod III and a connecting rod IV; the telescopic arm assembly comprises a fixed telescopic arm; multiple telescopic arms mutually sheathed together are sheathed on the fixed telescopic arm; and telescopic cylinders on each telescopic arm are arranged in a mutually staggered mode. The invention can realize the two-stage telescopic operation by adopting the horizontal support legs, enlarges the span distance among the support legs, enhances the bearing capability and strengthens the stability of the crane. The large-tonnage lorry-mounted crane provided by the invention has the advantages of simple structure, strong adaptability and lighter weight of the finished crane.

Description

technical field [0001] The invention relates to a truck-mounted crane, in particular to a truck-mounted crane suitable for large-tonnage heavy objects. Background technique [0002] Truck-mounted crane is a new type of high-efficiency lifting and transportation equipment integrating lifting and transportation. It is used more and more for its advantages of fast, flexible, efficient, convenient and the combination of loading, unloading and transportation. At present, the truck-mounted crane market is mainly dominated by small and medium-sized tonnage products of 5 to 12 tons. Large tonnage truck-mounted cranes mainly have the following problems: first, the working range is small, and the number of telescopic boom sections is small, which cannot meet the needs of large-scale work; second, the weight of the whole machine is heavy, and the lifting performance is poor; third, The passability of the whole machine and the applicability to different chassis are poor; the fourth is ...

AI Technical Summary

Problems solved by technology

Large tonnage truck-mounted cranes mainly have the following problems: first, the working range is small, and the number of telescopic boom sections is small, which cannot meet the needs of large-scale work; second, the weight of the whole machine is heavy, and the lifting performance is poor; third, The passability of the whole machine and the applicability to different chassis are poor; the fourth is that the span of the outriggers is small and the stability is poor

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