Safety device for stroke damping limit of bridge crane

Abstract

The invention discloses a bridge crane travel damping and limiting safety device. The bridge crane travel damping and limiting safety device comprises a damping seat, a limiting seat and a pressing device. The damping seat is connected with the limiting seat through connecting columns. The surface of the damping seat is provided with a plurality of damping rings. The tail end of the damping seat is provided with buffer racks. Each buffer rack comprises a piston rod and a buffer spring. The fixed ends of the piston rods are uniformly connected to the surface of the damping seat through connecting rods. The buffer springs are connected with the movable ends of the piston rods. The surface of each buffer spring is provided with a supporting seat. A plurality of limiting rods are connected tothe side surface of the limiting seat. Each limiting rod is provided with a mounting seat and a hydraulic rod. One end of each hydraulic rod is connected with the corresponding mounting seat, and theother end of each hydraulic rod is connected with a blocking seat. The pressing device comprises two fixed plates and two fixed seats. The bridge crane travel damping and limiting safety device conducts limiting on a crane truck in a multiple blocking and buffering mode, can be rapidly stopped after power is shut off to avoid exceeding of the specified position, guarantees the overall safety performance and is worth of popularization.

Description

technical field [0001] The invention relates to the technical field of cranes, in particular to a travel damping limit safety device for bridge cranes. Background technique [0002] The bridge crane is a lifting device that is horizontally placed over the workshop, warehouse and stockyard for material lifting. Because its two ends are located on tall concrete pillars or metal supports, it is shaped like a bridge. The bridge frame of the bridge crane runs longitudinally along the rails laid on the elevated sides on both sides. It can make full use of the space under the bridge frame to lift materials without being hindered by ground equipment. It is the most widely used and the largest number of hoisting machinery , The crane limiter is a necessary protective device to ensure the safe operation of the crane. Its safety function is to ensure that the working mechanism is in motion. When it is close to the limit position, it will automatically cut off the forward power source,...

AI Technical Summary

Problems solved by technology

The bridge frame of the bridge crane runs longitudinally along the rails laid on the elevated sides on both sides. It can make full use of the space under the bridge frame to lift materials without being hindered by ground equipment. It is the most widely used and the largest number of hoisting machinery , The crane limiter is a necessary protective device to ensure the safe operation of the crane. Its safety function is to ensure that the working mechanism is in motion. When it is close to the limit position, it will automatically cut off the forward power source, reduce the running speed of the cart, and prevent the travel from offside. , but often there is still power after the power source is cut off, which will lead to exceeding the limit position, resulting in a large safety hazard, which is not conducive to the safe work of the crane

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