Crane lifting mechanism

Abstract

The invention discloses a crane lifting mechanism belonging to the technical field of cranes. The crane lifting mechanism mainly comprises a winding drum and a fixed pulley block, wherein the winding drum is rotatably installed on the upper end surface of a frame through two bearing seats; the fixed pulley block is connected with a hook component through a rope; one end of the rope is fixed on the winding drum; the lifting mechanism also comprises a pulley beam for installing the fixed pulley block; and the pulley beam is installed on the upper end surface of the frame. In the invention, by changing the installing position of the fixed pulley block, the fixed pulley block can be maintained conveniently, and simultaneously, the lifting height of a heavy object is increased.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a lifting mechanism of a crane. Background technique [0002] When hoisting heavy objects, the crane relies on the hoisting mechanism to connect the hook with the rope to lift the heavy objects. The traditional hoisting mechanism includes a reel installed on the frame of the trolley and a fixed pulley block rotatably installed on the frame. The installation position of the pulley block is located on the frame under the drum. Although this structure makes the overall structure of the crane compact, it has the following disadvantages: [0003] 1. It is time-consuming and labor-intensive to overhaul the fixed pulley block. Since the fixed pulley block is located under the reel and limited by space, it is very difficult to maintain or replace the pulley block. It is even necessary to disassemble the reel and other components, which increases the workload of workers; [0004] 2. The l...

AI Technical Summary

Problems solved by technology

[0003] 1. It is time-consuming and labor-intensive to overhaul the fixed pulley block. Since the fixed pulley block is located under the reel and limited by space, it is very difficult to maintain or replace the pulley block. It is even necessary to disassemble the reel and other components, which increases the workload of workers;

[0004] 2. The lifting height of heavy objects is limited. The lifting height of heavy objects is limited by the position height of the fixed pulley block. Since the fixed pulley block is located on the frame beam under the reel, the heavy object can only be lifted up to the bottom of the frame beam. The distance from the fixed pulley block is close height position of half a meter;

[0005] 3. When lifting heavy objects, the fixed pulley block is subject to oblique tension, which will cause fatigue damage to the frame of the trolley and affect the normal operation of the crane

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