An elevator safety device

Abstract

The invention discloses an elevator safety device. The elevator safety device comprises a car, and a traction and control system, wherein safety brackets and retraction devices are arranged on the sidewall of an elevator well. The elevator safety device is characterized in that each safety bracket comprises a bracket seat fixed on the sidewall of the elevator well, and a bracket rod movably connected with the bracket seat through a pin shaft and capable of freely rotating relative to the bracket seat; and each bracket rod is capable of freely rotating in an angle alpha of less than 90 degrees relative to the corresponding bracket seat under the actions of a stop block and a limit table in the corresponding bracket seat. The device realizes purely mechanical braking during falling-off of the car at an abnormal speed, in particular, at an extreme speed, without the participation of any electronic component, thus the phenomenon of failure of emergency braking due to failure of electronic equipment, and the like, is prevented; the safety device is controlled by virtue of a normal power supply device or electronic equipment during normal running of the car, the normal falling-off of the car is not hindered, the traditional state of detecting, carrying out emergency braking and the like by the aid of electronic equipment is changed, the reliability is 100%, and the device can be applied to various vertical elevators.

Description

technical field [0001] The patent of the present invention relates to the technical field of elevator safety, in particular to a safety anti-falling device for car-type vertical elevators. Background technique [0002] With the rapid development of my country's economic construction and the acceleration of urbanization, elevators have become indispensable vertical transportation equipment in high-rise buildings. According to statistics, the scale of elevator procurement in my country has been at a relatively high growth level, with a growth rate of about 30%. As of the end of 2013, the number of elevators in my country has exceeded 3 million, becoming the veritable largest country in terms of production, sales and ownership. While the domestic elevator industry is thriving, frequent elevator failure incidents have become the focus of public and media attention. Elevator failures can cause incidents such as outage of elevators in the building, paralysis, and trapped people,...

AI Technical Summary

Problems solved by technology

At present, there are more and more high-rise buildings, and elevators are becoming more and more popular. At present, most of the existing safety devices to prevent elevators from falling use electronic components, which are easy to cause misoperation, misjudgment, and have a limited service life. , especially when the elevator is running suddenly when the power is cut off, the electronic components will not be able to function, and it is easy to fall due to loss of control, which not only causes damage to items, but also easily causes personal injury and death accidents, which seriously affects people's daily life and The production of enterprises and institutions caused great losses

Moreover, when there is a problem in the elevator circuit, it is impossible to prevent the elevator from falling suddenly, and there is a great hidden danger to the user's personal and property safety.

The current car-type elevators are all equipped with emergency braking devices. When a safety failure occurs, such as abnormal elevator speed, the brake shoes are usually used to clamp the elevator guide rail to produce braking. However, when the elevator guide rail breaks or other failures occur, emergency The braking device will fail and cannot work; when the car is on a higher floor, the safety of passengers cannot be guaranteed

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