Two-degree-of-freedom double-closed-loop hybrid drive reach-stack crane

Abstract

The invention discloses a two-degree-of-freedom double-closed-loop combination drive reach stacker comprising a hoisting arm, a hoisting arm lifting mechanism and a hoisting arm telescoping mechanism, wherein the lower end of a pitching arm of the hoisting arm is hinged with the middle part of a frame, a swing arm of the hoisting arm is hinged to the pitching arm; the hoisting arm lifting mechanism comprises a lifting rocker rod and a lifting connection rod, the lower end of the lifting rocker rod is hinged with the front part of the frame, the upper end of the lifting connection rod is hinged with a body of the swing arm, the other two ends of the lifting rocker rod and the lifting connection rod are hinged; the hoisting arm telescoping mechanism comprises a telescoping rocker rod and a telescoping connection rod, the lower end of the telescoping rocker rod is hinged with the rear part of the frame, a composite hinge is formed by the front end of the telescoping connection rod and the hinge point of the swing arm and the pitching arm, and the other ends of the telescoping rocker rod and the telescoping connection rod are hinged. According to the reach stacker, a strategy of combination drive of a high-power general motor and a small-power servo motor is adopted, and compared with a pure servo motor or a hydraulic drive mode, the reach stacker has the advantages of high power output, high reliability, low construction cost, and low maintenance cost.

Description

(1) Technical field: [0001] The invention relates to port hoisting machinery, in particular to a two-degree-of-freedom double-closed-loop mixed-drive front-loading crane. (two) background technology: [0002] The container reach stacker crane (also known as the container reach stacker) 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 combined drive of the telescopic oil cylinder and the pitch oil cylinder to complete the task. [0003] 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 ma...

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Problems solved by technology

[0003] 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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