Trigger device of over-speed governor

Abstract

The invention provides a trigger device of an over-speed governor, and belongs to the field of elevators. The trigger device of the over-speed governor comprises a rope wheel and a main shaft, whereinthe main shaft is arranged in the middle of the rope wheel; two centrifugal weights are symmetrically arranged on the rope wheel, and can perform synchronous centrifugal motion; and the trigger device of the over-speed governor further comprises an electromagnetic trigger mechanism, the electromagnetic trigger mechanism is arranged at the position corresponding to the centrifugal weights. When the electromagnetic trigger mechanism is electrified, the electromagnetic trigger mechanism forms a closed magnetic circuit with one of the two centrifugal weights, and the centrifugal weights generatecentrifugal motion under the action of electromagnetic force. According to the trigger device of the over-speed governor, the electromagnetic trigger mechanism is arranged to facilitate operators to remotely trigger the over-speed governor, so that the annual inspection and testing requirements are met; when the sensitivity of the over-speed governor needs to be detected below the rated speed, only the electromagnetic trigger mechanism needs to be switched on, so that the centrifugal weights generate centrifugal motion, the action of the over-speed governor is triggered, the convenience of detecting the of over-speed governor a machine-room-free elevator is greatly improved, and the remote operation is simple and convenient.

Description

technical field [0001] The invention relates to a speed governor trigger device, which is suitable for the field of elevators. Background technique [0002] The speed limiter is used to detect the running speed of the elevator car. When the elevator descends overspeed or falls, the movement of the elevator is controlled by an electrical safety switch. When the speed exceeds 115% of the rated speed of the elevator, the wire rope on the speed limiter passes through The pull mechanism triggers the linkage safety gear, and the safety gear acts as an emergency braking protection device to brake the overspeeding and falling car in the downward direction, thereby protecting the safety of the elevator. [0003] The national standard GB / T7588-2003, 9.9.8.3 stipulates that "when the following conditions are met, it is not necessary to meet the requirements of 9.9.8.2: a) the method of remote control (except wireless) can be used from outside the hoistway to realize the requirements of...

AI Technical Summary

Problems solved by technology

At this time, since the centrifugal speed limiter will only trigger the throwing block to perform centrifugal movement when the speed of the car exceeds the limited speed, in the elevator without machine room, the maintenance personnel cannot artificially trigger the throwing block, which is inconvenient for those who do not reach the rated speed. The sensitivity of the speed limit of the elevator speed limiter is detected, and the reliability of the braking device cannot be guaranteed.

At the same time, during the actual operation of the machine room-less elevator, if the car exceeds the set detection speed and the throwing block is still not triggered to produce centrifugal motion, the verification of the speed limiter, safety gear and linkage mechanism will not be completed. The subsequent safe operation of the elevator caused serious safety hazards

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