Lifting mechanism for casting crane

Abstract

A lifting mechanism of foundry hoister is composed of a dual-driving system which is installed on the platform of carriage and consists of two motors, shaft coupling, floating axle, shaft coupling with braking disk, braking system and speed reducer with two input axles and two output axles, dual-winder unit, winder coupling and a group of two static pulleys. Its advantages are small size and highsafety.

Description

technical field [0001] The invention belongs to hoisting and transporting machinery, in particular to a hoisting mechanism of a large and medium casting crane. Background technique [0002] There are two common arrangements for the lifting mechanism of existing large and medium-sized casting cranes: [0003] figure 1 Shown is the hoisting mechanism of a foundry crane designed by the German MAN company and Taiyuan Heavy Industry, which is arranged in the shape of three reducers. Two or four motors drive the two input shafts of the central reducer at the same time. The two output shafts of the reducer respectively drive a high-speed shaft of a secondary reducer through a coupling, and drive a reel on the low-speed shaft of the secondary reducer through a reel coupling. figure 2 , image 3 Shown is the hoisting mechanism of another cast crane with integrated reducer designed by Italian DF company and Taiyuan Heavy Industry, that is, two motors drive the two input shafts of ...

AI Technical Summary

Problems solved by technology

The disadvantage of the first arrangement is that the reliability is poor. When the coupling between the central reducer and the secondary reducer fails, it is easy to cause the ladle to tilt; To the outermost side of the secondary reducer, the size is larger, which makes the width of the small frame larger, which leads to an increase in the left and right limit dimensions of the spreader, which is difficult to meet the process requirements of the steel plant; the third is the arrangement of the reducer Both the lower box and the reel are above the plane of the trolley frame, and the height of the trolley is relatively large, which increases the project cost

The disadvantage of the second arrangement is that the lower box of the reducer is welded together with the trolley frame

(1) The small frame is required to have sufficient rigidity; (2) The manufacturing process is complex, requiring overall heat treatment and overall processing after welding, otherwise it is difficult to control the manufacturing quality

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