Automatic leveling system, operating vehicle and leveling method of hybrid boom aerial work vehicle

Abstract

The invention discloses an automatic leveling system of an aerial platform of a hybrid cantilever crane, the aerial platform and a leveling method. The automatic leveling system comprises a primary leveling mechanism, a secondary leveling mechanism, a hydraulic driving system and a controller, wherein the secondary leveling mechanism comprises a fly jib amplitude cylinder (2), a second swing rod (3), a second connecting rod (4) and a fly jib (5), the primary leveling mechanism comprises a workbench leveling cylinder (6), a first swing rod (8), a first connecting rod (9), a connecting frame (10), an oscillating cylinder (11) and a bracket (12), and the hydraulic driving system comprises a primary hydraulic driving system and a secondary hydraulic driving system. According to the leveling system, the aerial platform and the leveling method, the problem that an output oscillating angle of a leveling oil cylinder in a twin-stage extensible hybrid arm aerial working platform with a fly jib is limited is solved, the leveling function of a workbench in a large spatial range is realized with an 260-degree amplitude angle of a working arm, and the quick response and the control precision of the leveling system are improved in an electrical-hydraulic leveling manner.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an automatic leveling system, an operation vehicle and a leveling method of a hybrid boom aerial work vehicle. Background technique [0002] As one of the key technologies of aerial work vehicles, worktable leveling technology directly affects the safety of operators, the flexibility of operations and the adaptability of the environment. The development process is closely related to the complexity of the boom structure of aerial work vehicles, that is, the development process of folding booms, telescopic booms, hybrid booms, etc. It has experienced self-weight, mechanical, machine-hydraulic, hydraulic Type, electro-hydraulic and many other different leveling methods. For aerial work vehicles with low and medium working heights, the performance of the leveling system mainly includes two aspects: stability and leveling accuracy. Usually, there are three main leveling...

AI Technical Summary

Problems solved by technology

Traditional mechanical and machine-hydraulic leveling methods have problems such as large lag and low control accuracy. For this reason, electro-hydraulic leveling methods are widely used, but the mechanism that drives the platform swing is mostly a four-bar linkage device. When the horizontal cylinder has a built-in boom, it is limited by the mechanical constraints and the input swing angle of the leveling cylinder, so there is a shortage of output leveling angle in a large working range

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