Pulley block for hook bridge crane

Abstract

The invention discloses a pulley block for an overhead crane with hook. The pulley block comprises an outer protective shell and side walls, wherein the semi-circular outer protective shell is mounted at the bottoms of the side walls in a sleeving manner; limiting grooves are formed in the outer walls of tops of the side walls; rectangular springing cavities are formed in the inner walls of the side walls and communicate with the limiting grooves; a primary shaft and a secondary shaft are transversely mounted in middles of bottoms and tops of the side walls; main auxiliary wheels are mounted at two ends of the primary shaft; main reels C are mounted on the inner sides of the main auxiliary wheels; combined reels D are mounted on the inner sides of the main reels C in a sleeving manner; lifting hook side plates are mounted at two ends of the combined reels and longitudinally penetrate through the bottom of the outer protective shell; two ends of the secondary shaft are mounted in the limiting grooves in a sleeving manner; a shaft sleeve ring is mounted at the part, in the springing cavities, of the secondary shaft in a sleeving manner; T-shaped rods are mounted at the top and the bottom of the shaft sleeve ring; springs are mounted on the T-shaped rods in a sleeving manner; secondary auxiliary wheels are mounted at two ends of the secondary shaft in a sleeving manner; small rollers A are arranged on the inner sides of the secondary auxiliary wheels; and combined rollers B are arranged on the inner sides of the small rollers A. The composability is high and steel cable connection is stable.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a pulley block for hook bridge cranes. Background technique [0002] The pulley block is composed of several fixed pulleys, movable pulleys and ropes passing through them. It is a simple lifting tool for labor saving and speed change, and is also one of the indispensable parts of lifting machinery. During the process, due to the change of the force state and the winding form of the pulley block itself, the pulley block tilted, resulting in damage to the cable friction and reducing the service life of the cable. Contents of the invention [0003] In order to overcome the deficiencies of the existing technical solutions, the present invention provides a pulley block for a hook bridge crane, which not only reduces the swing of the steel cable during the hoisting process from the arrangement of the pulley block and the installation structure, but also through the set pulley combinat...

AI Technical Summary

Problems solved by technology

[0002] The pulley block is composed of several fixed pulleys, movable pulleys and ropes passing through them. It is a simple lifting tool for labor saving and speed change, and is also one of the indispensable parts of lifting machinery. During the process, due to the change of the force state and the winding form of the pulley block, the pulley block will tilt, causing friction damage to the cable and reducing the service life of the cable

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