Safety gear of elevator

Abstract

The invention provides a safety gear of an elevator and belongs to the technical field of elevators. The safety gear of the elevator comprises a speed detection piece, a pressure detection piece, a safety gear body and a controller; a heat radiation piece is arranged on the safety gear body; and the safety gear body comprises a bracket, a first mounting chamber, a second mounting chamber and a motor. According to the safety gear of the elevator, the speed detection piece detects a movement speed of an elevator car, the pressure detection piece detects a surface pressure of a suspension rope, the safety gear body brakes and stops the car on a guide rail, the motor drives a pull rod to move in a first preset direction so that a first wedge block extrudes a second wedge block to move in a direction close to the guide rail by using a rolling needle row, and a heat radiation piece can cool the safety gear body to prevent the safety gear body from being heated due to friction; and therefore,the friction force is prevented from being reduced to over-high temperature so that the safety gear is safely lowered, the heat radiation piece enables the temperature on the safety gear body to be not overhigh so that the safety of the safety gear is enhanced.

Description

technical field [0001] The invention belongs to the technical field of elevators and relates to a safety gear of an elevator. Background technique [0002] When the elevator breaks down unexpectedly, causing the elevator to run at overspeed, or the elevator falls unexpectedly, in order to protect the safety of the passengers, the elevator is usually equipped with a safety protection device. Conventional safety protection devices include a speed limiter and a safety gear. When the elevator runs at an overspeed, the speed limiter starts to pull up the pull rod of the safety gear, so that the safety gear clamps the guide rail to brake the elevator car. The traditional safety gear is divided into instantaneous type and progressive type, which are respectively used in elevators with running speeds below 0.63m / s and above 0.63m / s. However, the traditional safety gear generates high heat during actual braking, and the friction plate on the braking surface is easy to wear out durin...

AI Technical Summary

Problems solved by technology

However, the traditional safety gear generates high heat during actual braking, and the friction plate on the braking surface is easy to wear out during the long-term operation of the elevator, resulting in a decrease in safety performance. In addition, the traditional safety gear has a small braking adjustment range, making it difficult to It has a good braking effect on various overspeed situations

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