Hoisting mechanism of crane

Abstract

The invention discloses a hoisting mechanism of a crane. The hoisting mechanism of the crane comprises a winding drum, a steel wire rope, two upper pulley blocks, two lower pulley blocks and two guidepulleys; the two lower pulley blocks are correspondingly arranged at two ends of a lifting appliance, and each lower pulley block corresponds to one upper pulley block and one guide pulley; the middle part of the steel wire rope is positioned between the two guide pulleys, two ends of the steel wire rope are correspondingly fixed on the winding drum by bypassing the corresponding guide pulley, lower pulley block and upper pulley block; and the included angle between the steel wire rope among the corresponding guide pulley, lower pulley block and upper pulley block and the vertical surface vertical to the winding drum is within a preset value. According to the hoisting mechanism of the crane, the two lower pulley blocks are arranged at the two ends of the lifting appliance correspondingly,and the problems of unbalance, swing and the like possibly generated by the lifting appliance are avoided; the two upper pulley blocks and the two guide pulleys are correspondingly arranged, so thatthe universal safety requirement of hoisting is met, and the safety and the reliability are higher; and the number of steel wire ropes is reduced, and the equipment structure and installation difficulty are simplified.

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] The hoisting mechanism is the basic structure necessary for a crane to lift and lower objects. The hoisting mechanism is driven by the hoisting motor to rotate the reel, so that the wire rope / cable wound on the reel drives the hook device up or down. The stability of the hoisting mechanism will directly affect the working performance of the whole crane. [0003] A schematic diagram of a hoisting mechanism provided by the prior art is as attached figure 1 As shown, the hoisting mechanism includes a drum, two wire ropes, an upper pulley block (fixed pulley block), a lower pulley block (moving pulley block) and a balance arm. One end of a steel wire rope is fixed on one end of the drum, wound out from the middle of the drum, and the other end is fixed on one end of the balance arm after going around the upper pulley blo...

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Problems solved by technology

[0004] The inventor found at least the following problems in the prior art: the lower pulley group is located in the middle of the spreader, it is difficult to adjust the two sides of the spreader to balance the force, and the spreader is easy to swing left and right, which affects the safety of lifting

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