Hoisting mechanism of crane

Abstract

The invention relates to the technical field of hoisting machinery, and discloses a hoisting mechanism of a crane. The hoisting mechanism comprises a bottom plate, a top plate, a winding drum, a lifting hook assembly and a transmission assembly, wherein the bottom end of the inner wall of the bottom plate is fixedly connected with the lifting hook assembly, the top end of the bottom plate is fixedly connected with the transmission assembly, the inner wall of the transmission assembly is rotationally connected with the winding drum, and the top end of the transmission assembly is fixedly connected with the top plate. During daily operation of the device, a driving motor operates to drive the winding drum to rotate, when the winding drum is directly jammed and stops operating due to the ropedisorder phenomenon, the driving motor still operates to drive a rotating shaft to rotate, but the rotating force is larger than the acting force of an elastic ball on an ejection strip, the ejectionstrip overcomes the elastic force of the elastic ball and returns into an ejection groove, the rotating shaft normally operates, and the situation that the driving motor is damaged by overheat of themotor when the winding drum stops is avoided. According to the device, the service life of the driving motor is greatly prolonged, the winding drum can be braked in time, and safety accidents causedby falling of heavy objects can be prevented.

Description

technical field [0001] The invention relates to the technical field of hoisting machinery, in particular to a hoisting mechanism of a crane. Background technique [0002] The hoisting mechanism of a crane, also known as a hoist, is the core mechanism for a crane to lift and lower heavy objects. The hoisting mechanism uses a drive motor to drive the reel to rotate, so that the steel cable wound on the reel is driven through the boom device belt. The lifting or lowering of the hook is used to lift the heavy objects. The existing lifting equipment uses a single reel to lift the hook. Since the lifting equipment often needs to be hoisted at high altitudes, the steel cables used are relatively heavy. Long, so that the volume of the reel is huge, so once the reel fails, it will cause the shutdown of the entire equipment and safety accidents, and the problem of uneven arrangement of hoisting machinery cables has always been a common problem in hoisting machinery all over the world....

AI Technical Summary

Problems solved by technology

[0002] The hoisting mechanism of a crane, also known as a hoist, is the core mechanism for a crane to lift and lower heavy objects. The hoisting mechanism uses a drive motor to drive the reel to rotate, so that the steel cable wound on the reel is driven through the boom device belt. The lifting or lowering of the hook is used to lift the heavy objects. The existing lifting equipment uses a single reel to lift the hook. Since the lifting equipment often needs to be hoisted at high altitudes, the steel cables used are relatively heavy. Long, so that the volume of the reel is huge, so once the reel fails, it will cause the shutdown of the entire equipment and safety accidents, and the problem of uneven arrangement of hoisting machinery cables has always been a common problem in hoisting machinery all over the world. Most of the lifting equipment will be equipped with a rope guide so that the steel ropes are neatly arranged on the drum, but the rope guide is a vulnerable part, which often needs to be repaired and replaced. During the operation of the equipment, once the rope guide appears Faults will cause the cables to be arranged unevenly, and then there may be a phenomenon of disordered ropes, and even when the cables are broken due to uneven stress, heavy objects will fall directly, resulting in property damage and safety accidents. It is necessary to perform emergency braking on the reel to stop its rotation, but the existing method of braking the reel has some defects. Usually, the hydraulic system is used to control the braking force of the brake end on the brake disc, but this brake The driving method often only uses a single transmission rod for transmission, and the braking area is small, so that when the reel is braked, the heavy object will fall for a certain distance, and even the braking is invalid, which has a great potential safety hazard. The phenomenon of rope disorder directly makes the reel stuck. At this time, the drive motor is still running, which may cause overheating and damage to the drive motor. Therefore, we propose a crane lifting mechanism with double reels, fast braking and motor protection.

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