Design of a Height Limit Device for Anti Reverse Coiling of Crane Steel Wire Rope
As an important protective device for cranes,the upper and lower limits of the crane lifting mechanism are usually in-stalled in two different structural forms to ensure their reliable and effective operation.This article analyzes the working princi-ple of the crane lifting mechanism and combines the existing four common structural forms of limit devices,A cut-off type de-scent limit structure is proposed:this structure limits the minimum number of safe winding turns of the lifting steel wire rope on the drum by setting a limit cable on the plane of the crane frame.When the actual number of turns is less than this,the external force generated by the limit cable driven by the lifting steel wire rope is transmitted through the steering pulley and tension spring device to the fork to disconnect the power supply,achieving the descent limit function of the lifting mechanism.The fea-sibility of this device has been fully verified through successful cases of actual installation and application.
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