Proving ring of load lifting limiter

Abstract

The invention relates to a proving ring of a load lifting limiter, which belongs to the technical field of lifting safety protection. The proving ring comprises a circular ring, wherein two pairs of connecting sleeves and fixed plates which are perpendicular to each other are arranged in the circular ring, the connecting sleeves are arranged on the vertical plumb line of the inner side of the circular ring, the fixed plates are fixed to the horizontal line of the inner side of the circular ring, the connecting line of the centers of the two fixed plates is perpendicular to the connecting line of the centers of the two connecting sleeves, connecting plates are respectively arranged on the two fixed plates, microswitches are installed on one connecting plate on one side by virtue of mounting plates, adjusting screws are installed on the other connecting plate on the other side by virtue of mounting plates, and the microswitches correspond to the adjusting screws. The proving ring has the advantages of reasonable and simple structure, easiness in production and manufacturing, reasonable structure of a ring body and convenience in installation and adjustment, the microswitches, the adjusting screws, anti-loosing screws and anti-loosing plates are respectively installed on the fixed plates by virtue of the connecting plates, and the anti-loosing screws are arranged on the connecting plate between the two adjusting screws so as to extrude the anti-loosing plates, so that the adjusting screws are prevented from loosing, the limit to the lifting is facilitated, and overweight and accidents are avoided.

Description

technical field [0001] The invention relates to a protection device for controlling lifting overload, and belongs to the technical field of lifting safety protection. Background technique [0002] Cranes are widely used in all walks of life and are essential key equipment for large-scale project construction. The lifting capacity limiter is a safety protection measure for cranes. Lifting safety accidents occur frequently due to lifting overload, and installing a lifting weight limiter on the lifting machinery is an important guarantee to prevent such accidents from happening. The conventional lifting capacity limiter force-measuring ring includes a bow plate, a micro switch, an adjustment screw, and a control part of a lock nut. The control part uses glue to stick two bow plates in the force-measuring ring. One end of the force-measuring ring is fixed, and the other end is strung together with the pulley on the pin shaft and fixed with a loose washer. The pulley of the lift...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the deficiencies of the deflection coefficient of the bow plate in the force measuring ring of the existing crane lifting protection device, the glue falling off, the aging of the pressure block, and the rebound error, and provide a lifting device with a small change in the ambient temperature and a limited lifting capacity. Force-measuring rings with good protection capacity limiter

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