Driving wheel overspeed automatic stopping and braking device for elevator

Abstract

The invention belongs to the technical field of elevator safety, and particularly relates to an elevator driving wheel overspeed automatic braking device which comprises a driving wheel body, a traction groove is formed in the surface of the driving wheel body, a stable support is fixedly installed on the outer side of the driving wheel body, and a bearing annular wheel is fixedly installed on the inner side of the driving wheel body. According to the driving wheel overspeed automatic stopping and braking device for the elevator, by arranging a sliding groove, a sliding block and a ventilation pipe, when an external motor temporarily rotates too fast due to external voltage fluctuation, the sliding block slides in the sliding groove to be close to and make contact with an arc-shaped plate, the arc-shaped plate is pushed to slide in a bearing annular wheel, and the arc-shaped plate can extrude an elastic air bag; air flow in the compression spring can enter the closed space through the ventilation pipe, air pressure in the closed space changes to push the brake block to get close to and make contact with the fixing shaft, rotation of the driving wheel body is hindered, and the effect of speed reduction of the driving wheel body is achieved.

Description

technical field [0001] The invention relates to the technical field of elevator safety, in particular to an overspeed automatic braking device for an elevator driving wheel. Background technique [0002] Vertical elevator is a kind of electric drive equipment installed in high-rise buildings to carry people or goods automatically. The safety protection system is composed of a complex overall structure. The traction rope connects the driving wheel, the load-bearing balance plate and the car. The motor in the electric drive system drives the driving wheel to rotate, and the driving wheel drives the load-bearing balance plate to move up and down through the traction rope. , and then drive the car to move up and down. As more and more high-rise buildings continue to appear, people's demand for elevators is also increasing. [0003] When the elevator is running, the car is in the suspended state, so the safety of the elevator operation is particularly important, and the safety a...

AI Technical Summary

Problems solved by technology

[0003] When the elevator is running, the car is in a suspended state, so the safety of the elevator is particularly important, and elevator safety accidents often occur. At present, the elevator is running out of control, and the safety protection system will automatically detect its running speed. When the running speed exceeds the limit When the speed is high, the built-in brake device will automatically start and complete the timely stop of the elevator. However, the current brake device is basically passively activated, that is, there is a certain reaction time between the elevator out of control and the completion of the brake action. As a result, the elevator does not stop and brake in time, and there are certain safety hazards. At the same time, the current out-of-control braking device basically stops the car and cannot limit its driving force, resulting in poor braking effect and long braking time. , In addition, during the operation of the elevator, the short-term acceleration of the driving motor speed due to external voltage fluctuations will cause the elevator to trigger the brake device, resulting in the elevator stopping, delaying the time of the passengers in the elevator, and affecting the normal operation of the elevator

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