Multifunctional weight safety device

Abstract

The invention relates to a multi-function weight safety device, which is mainly used for safe guarding of a material hoisting machine such as a headframe, a portal frame and the like. The safety device comprises a lifting lug (1), an upper cover (2), a protecting cap (3), a connecting rod (4), a bottom board (5), a pulling rod (6), a movable plate (7) and a main spring (8). The device is characterized in that a supporting rod (9) is arranged on the bottom board (5); a level (10) is arranged on the top end of the supporting rod (9); a trim screw rod I (11) is arranged on the upper end at one side of the level (10); a return spring I (12) is arranged on the upper end at the other side of the level (10); a travel switch I (13) is arranged on the lower end of the level (10); a push rod (15) passes through a return spring II (14) and the bottom board (5); the upper end of the push rod (15) is provided with a travel switch II (16); a trim screw rod III (18) is arranged on the upper cover (2); a vertical bar of the trim screw rod III (18) passes through the upper cover (2) and extends out of the upper plane of the movable plate (7); and the lower end of the trim screw rod III (18) is provided with a travel switch III (17) which is fixed on the movable plate (7). The device integrates an overload limiting stopper, a superior limiting stopper and an interior limit stopper into a whole, and has the advantages of compact structure, and convenient, safe and reliable use.

Description

(1) Technical field [0001] The invention relates to a hoist limiter, in particular to a multifunctional weight safety device, which is mainly used for the safety protection of material hoists such as derricks and gantry frames. It belongs to the lifting equipment safety agency. (2) Background technology [0002] The hoist belongs to the category of cranes. Like external elevators and tower cranes, it is composed of standard sections or standard parts. The transmission mechanism is composed of pulley blocks and wire ropes. The body is lifted and lowered to complete all the work of the crane. As vertical transportation equipment, it is widely used in construction sites in various places, and its safety performance has also attracted much attention. [0003] CN2441786Y discloses a safety limiter for a crane, which is an upper limit limiter. When the crane rises to the highest position, it will stop and continue to rise, so as to prevent the cage from rushing to the top and en...

AI Technical Summary

Problems solved by technology

This type of crane safety limiter can only prevent the cage from rushing to the top, but when the weight of the cage is overweight, it cannot guarantee safety

Moreover, when the material in the cage protrudes out of the cage and is blocked by the frame during the downward process of the cage, or when it descends to the ground, the lifting force changes. At this time, the hoist continues to move downward, and the wire rope on the hoist will be excessively slack, which is prone to rope disorder , causing a safety hazard

To solve the above problems, it is necessary to reinstall the overload limiter and the lower limit limiter, causing inconvenience in use

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