Crane hoisting mechanism with extension sleeve

Abstract

The invention discloses a crane hoisting mechanism with an extension sleeve, comprising a trolley frame, a steel wire rope, a winding drum, a balance arm and a movable pulley block. The crane hoisting mechanism is characterized in that the extension sleeve is composed of an extension sleeve assembly IV, an extension sleeve assembly III, an extension sleeve assembly II and an extension sleeve assembly I, wherein the extension sleeve assembly IV is sequentially sheathed with the extension sleeve assembly III, the extension sleeve assembly II and the extension sleeve assembly I. The circumferences of the extension sleeve assemblies IV, III, II are respectively equipped with four stop blocks and four roller wheel assemblies which are alternately and uniformly distributed, wherein the installation phase difference of the stop block and the roller wheel between the extension sleeve assembly IV and extension sleeve assembly III is 45 DEG, and the installation phase difference of the stop block and the roller wheel between the extension sleeve assembly III and extension sleeve assembly II is zero. The extension sleeve assemblies I, II, III are respectively equipped with four guide rails I, II, III, which are uniformly distributed on the circumferences of the extension sleeve assemblies and are respectively and freely connected with the roller wheels on the extension sleeve assemblies II, III, IV. The upper flange of the extension sleeve assembly IV is fixedly connected with the trolley frame; and the lower flange of the extension sleeve assembly I is fixedly connected with a pulley assembly, and the steel wire rope is wound on the lower flange which is fixedly connected with the balance arm by virtue of the movable pulley block.

Description

technical field [0001] The present invention relates to load-suspension elements or devices for transmitting lifting forces on or in connection with lowering mechanisms, and in particular to crane hoisting mechanisms with telescoping sleeves. Background technique [0002] In the lifting mechanism of a traditional crane, the drum or the fixed pulley and the movable pulley are only connected by wire ropes, and the connection between the load and the trolley is flexible. When the trolley is running or the cart is running, the load will swing due to inertia, which will affect the positioning accuracy of the load. Even if the hoisting mechanism of a crane with better working conditions is used, the positioning accuracy of the load can only reach the centimeter level. For some special working conditions with higher requirements, it is necessary to improve the positioning accuracy of the load to the millimeter level, such as ±5mm, and the lifting mechanism of the traditional crane...

AI Technical Summary

Problems solved by technology

For some special working conditions with higher requirements, it is necessary to improve the positioning accuracy of the load to the millimeter level, such as ±5mm. The traditional crane lifting mechanism cannot meet this requirement.

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