Limited heavy hammer for crane anti-overwinding switch

Abstract

The invention discloses a limited heavy hammer for a crane anti-overwinding switch, which comprises a left-half limited block, a right-half limited block, a locking column, a nut and a locking plate, wherein the left-half limited block and the right-half limited block are pivoted together through a pin shaft and are in fan-shaped opening and closing states, and a steel-wire rope-passing hole is formed when the bonding surface of the left-half limited block and the bonding surface of the right-half limited block are closed; the nut is screwed on the locking column, the locking column is fixedly connected to one end of the right-half limited block away from the pin shaft; and the first end of the locking plate is pivoted at one end of the left-half limited block away from the pin shaft, andthe second end of the locking plate is provided with an open slot which is in locking match with the locking column on the second installing surface of the right-half limited block and a sunk hole which is used for receiving the nut. The limited heavy hammer disclosed by the invention is rapid to assemble and disassemble, the quick replacement of steel-wire rope magnification can be realized, andthe time for replacing the magnification can be reduced.

Description

technical field [0001] The invention relates to a crane overrolling prevention switch, in particular to a limit weight of the overrolling prevention switch. Background technique [0002] During the hoisting process of the crane, the height of the hook of the crane gradually increases with the hoisting of the wire rope, and a heavy hammer type anti-overwinding switch is installed on the lifting path of the hook, which is also called an overwinding protection device. When the hook touches the limit weight of the anti-overwinding switch, the anti-overwinding switch acts. [0003] figure 1 The usage state diagram of the anti-overwinding switch is shown. Such as figure 1 As shown, the anti-overwinding switch 11' is installed on the boom 10', and the hook wire rope 12' runs through the limit weight 13'. When the hook 14' moves upward to lift the limit weight 13', the limit weight The pulling force of the hammer 13' to the anti-overwinding switch is eliminated, and the anti-ove...

AI Technical Summary

Problems solved by technology

[0005] During the commissioning and operation of the crane, it is sometimes necessary to replace the wire rope magnification. However, it is inconvenient to disassemble the left half limit block and the right half limit block of the existing limit weight, and the connecting parts such as bolts and nuts are easy to be lost.

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