Two-degree-of-freedom seven-bar hybrid drive reach stacker crane

Abstract

The invention discloses a two-DOF (Degree-of-Freedom) seven-bar hybrid-driven front hoisting crane, which comprises a hoisting arm, a hoisting arm elevating mechanism and a hoisting arm swinging mechanism, wherein the lower end of an elevating arm of the hoisting arm is hinged in the middle of a frame, and a swing arm of the hoisting arm is hinged with the elevating arm; the hoisting arm elevating mechanism comprises an elevating rocker bar and an elevating connecting bar, the lower end of the elevating rocker bar is hinged with the front part of the frame, the rear end of the elevating connecting bar is hinged with an arm body of the elevating arm, and the elevating rocker bar is hinged with the other two ends of the elevating connecting bar; the hoisting arm swinging mechanism consists of a swinging rocker bar and a swinging connecting bar, the lower end of the swinging rocker bar is hinged with the rear part of the frame, the front end of the swinging connecting bar is hinged with the swinging arm, and the swinging rocker bar is connected with the other two ends of the swinging connecting bar. The swinging rocker bar and the elevating rocker bar adopts the hybrid-driven strategy of a large-power conventional motor and a small-power servo motor, and compared with a purely servo motor or hydraulic driving mode, the two-DOF seven-bar hybrid-driven front hoisting crane has larger power output and higher reliability, and is low in manufacturing cost of the whole crane, and low in maintenance cost.

Description

[0001] (1) Technical field: [0002] The invention relates to port hoisting machinery, in particular to a two-degree-of-freedom seven-rod mixed-drive front-loading crane. [0003] (2) Background technology: [0004] The container reach stacker crane is an important port machinery, which has the advantages of convenient operation and high stacking layers, and plays an important role in various port container handling, stacking and transportation operations. As disclosed in CN103332220A, CN101723256A, CN202322093U, CN2773035, and CN201890746U, the container reach cranes are all driven by the joint drive of swing cylinder and pitch cylinder to complete the task. [0005] However, the above-mentioned traditional container reach cranes are all purely hydraulically driven, and their hydraulic systems have disadvantages such as high requirements for parts processing and assembly, high manufacturing, maintenance, and maintenance costs, short service life, and oil leakage. Moreover, du...

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned traditional container reach cranes are purely hydraulically driven, and their hydraulic systems have disadvantages such as high requirements for parts processing and assembly, high manufacturing, maintenance, and maintenance costs, short service life, and oil leakage.

Moreover, due to the limitation of its own structure, the lifting mechanism of this kind of traditional open-chain series structure has problems such as bulky components, poor rigidity, large inertia, accumulation of joint errors, etc., and poor dynamic performance, which makes it difficult to meet the increasingly stringent high-speed Heavy duty requirements

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