A anti -falling device for hoisting machinery hoisting mechanism

The utility model relates to an anti -falling device for hoisting machinery hoisting mechanism, it includes the pulley frame, fix the assembly pulley on the pulley frame through the pulley spindle, be equipped with horizontal beam between pulley frame coexistence inboard side and the assembly pulley outside pulley, a horizontal beam front end upper strut locking piece, the effect of horizontal beam afterbody has the pull rod of vertical setting, the pull rod bottom articulates on the pulley frame, be equipped with the trigger device of centrifugal force activation on two outside pulley outer walls of assembly pulley, when pulley rotation out of control quick is sent centrifugal force and is greater than the default, trigger device hits dozen pull rod makes its and horizontal beam break away from, horizontal beam rotates, locking piece whereabouts and pulley friction auto -lock. The utility model discloses utilize centrifugal force activation locking means, utilize the friction lock principle of dying, through the locking piece with the assembly pulley, play to rise wire rope and pulley frame lock is as an organic whole, has solved reducer shaft, when the wire rope fracture leads to the unexpected stall of hoisting mechanism, the hoisting mechanism that existing device can't be overcome has reached the load problem of falling that rises.