Small crane

Abstract

The invention discloses a small crane, comprising a base, wherein the base is provided with a supporting arm, the upper end of the supporting arm is provided with a suspension arm, the middle part of the suspension arm is articulated with the supporting arm, the rear end of the suspension arm is provided with a draw arm, the upper part of the draw arm is articulated with the rear end of the suspension arm, the lower part of the supporting arm is provided with a lever, the middle part of the lever is articulated with the supporting arm, the rear end of the lever is articulated with the lower end of the draw arm, the front end of the lever is provided with a roller, the base is provided with a guide rail, the upper surface of the guide rail is a cambered surface, and the cambered surface ofthe guide rail is matched with the roller; and the front end of the suspension arm is provided with a first pulley, the supporting arm or the draw arm is provided with a rotary drum, the rotary drum is arranged at the lower part of the draw arm or the supporting arm, the draw arm or the supporting arm is provided with a second pulley which is arranged on the draw arm or the supporting arm together with the rotary drum, the second pulley is arranged above the rotary drum and poisoned on a articulation part between the draw arm and the suspension arm or between the supporting arm and the suspension arm, the rotary drum is provided with a suspension rope, and one end of the suspension rope sequentially rounds the second pulley and the first pulley for installing of a lifting hook.

Description

technical field [0001] The invention relates to a small crane. Background technique [0002] The drum and the motor of the existing small cranes are all installed at the front end of the boom, which has the following deficiencies during use: First, because the sling between the drum and the hook does not have any directional mechanism, and the distance is too short, Therefore, when the drum retracts the sling, it is easy to climb the rope. Once the rope climbs, the sling will jump on the drum during the rope release process when hoisting the heavy object, causing the heavy object to vibrate violently, and eventually causing the crane to fall. Dangerous consequence; The 2nd, drum and motor are installed in boom front end, bring great inconvenience to installation or maintenance drum and motor. Contents of the invention [0003] The purpose of the present invention is to provide a small crane, which can prevent rope climbing and improve the safety of the crane operation, an...

AI Technical Summary

Problems solved by technology

[0002] The drum and the motor of the existing small cranes are all installed at the front end of the boom, which has the following deficiencies during use: First, because the sling between the drum and the hook does not have any directional mechanism, and the distance is too short, Therefore, when the drum retracts the sling, it is easy to climb the rope. Once the rope climbs, the sling will jump on the drum during the rope release process when hoisting the heavy object, causing the heavy object to vibrate violently, and eventually causing the crane to fall. Dangerous consequences; second, the drum and motor are installed at the front end of the boom, which brings great inconvenience to the installation or maintenance of the drum and motor

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