Safety anti-falling device for elevator

Abstract

The invention discloses a safety anti-falling device for an elevator. The safety anti-falling device comprises a speed governor mounted on the upper portion of an elevator car, a pair of safety tongs which is mounted on the two sides of the lower portion of the elevator car and matched with a guide rail, and a lifting mechanism connecting the speed governor with the pair of safety tongs, wherein the speed governor comprises a friction wheel tightly attached to the guide rail in a rolling mode, a centrifugal wheel coaxially fixed to the friction wheel, a winding drum which is coaxial with the friction wheel and arranged on a shaft in an empty sleeving mode, a guide wheel located above the friction wheel, and a steel wire rope which is wound on the winding drum, bypasses the guide wheel upwards and is then connected with the input end of the lifting mechanism downwards; a sinking groove is formed in the side, close to the centrifugal wheel, of the winding drum; clamping jaws are distributed on the inner wall of the sinking groove; throwing hooks and springs connected with the throwing hooks are arranged on the centrifugal wheel; the throwing hooks are located in the sinking groove; the throwing hooks are restrained by the springs in the normal state; when the centrifugal wheel is in an overspeed state, the throwing hooks overcome spring force to conduct centrifugal throwing and hook the clamping jaws to lock and fix the centrifugal wheel and the winding drum; and the lifting mechanism can lift and trigger the safety tongs on the two sides to brake at the same time. The safety anti-falling device is mounted on the elevator car as a whole, so that a full-length steel wire rope is omitted.

Description

technical field [0001] The invention belongs to the technical field of elevators, and in particular relates to an elevator safety anti-falling device. Background technique [0002] The elevator safety anti-drop device generally includes a speed limiting part and a braking part. The function of the speed limiting part is to trigger the braking part when the car falls rapidly. The braking part generally uses a safety gear, and its function is to brake the car after starting . In the current elevator safety anti-falling device, for the speed limiting part, the speed limiter is installed on the floor of the machine room, and the tensioner is located at the bottom of the elevator shaft, and the two are connected by the speed limiter rope. It is long, and the various rope lines in the elevator shaft are messy and easy to wind. Contents of the invention [0003] The purpose of the present invention is to provide an elevator safety fall prevention device, which is integrally ins...

AI Technical Summary

Problems solved by technology

In the current elevator safety anti-falling device, for the speed limiting part, the speed limiter is installed on the floor of the machine room, and the tensioner is located at the bottom of the elevator shaft, and the two are connected by the speed limiter rope. It is long, and all kinds of rope lines in the elevator shaft are messy and easily entangled

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