Two-way safety gear used for preventing lift car from moving accidentally

Abstract

The invention discloses a two-way safety gear used for preventing a lift car from moving accidentally. The two-way safety gear is clamped on a guide rail and comprises an inner shell arranged in an inner cavity of an outer shell. A horizontal positioning screw and a first horizontal movable screw with an elastic piece are arranged between the outer shell and the inner shell. Flat gear bodies are arranged on the portions, on the left side and the right side of the guide rail, of the inner cavity of the inner shell respectively. An upper wedge gear body and a lower wedge gear body which are symmetrical about the horizontal middle line of the inner shell are arranged on the portions, on the left side and the right side of the guide rail, of the inner cavity of the inner shell respectively. Double wedge blocks which are symmetrical about the horizontal middle line of the inner shell are arranged on the portions, on the left side and the right side of the guide rail, of the inner cavity of the inner shell respectively. The double wedge blocks are connected with the inner shell through second horizontal movable screws with elastic pieces. Movable push-pull rods extending out of a horizontal pipe cavity of the inner shell are arranged on the portions, on the rear right sides of the double wedge blocks, in the inner cavity of the inner shell. The contact faces between the front ends of the movable push-pull rods and the double wedge blocks are inclined faces. The movable push-pull rods are connected with safety gear transmission mechanisms through horizontal pin shafts. The two-way safety gear is simple in structure, safe and reliable. The braking force of the two-way safety gear directly acts on the lift car and the guide rail. The two-way safety gear has the good short-distance and short-time braking effect for the accidental movement of the lift car.

Description

technical field [0001] The invention relates to the technical field of elevator equipment safety, in particular to a two-way safety gear for preventing accidental movement of a car. Background technique [0002] In high-rise buildings, direct elevators have been widely used for their fast and convenient lifting. The elevator safety gear device is a safety device that stops the car in an emergency and clamps it on the guide rail when the elevator has a very serious fault such as overspeed or broken rope under the control of the speed limiter. It is generally composed of a shell, wedges, jaws, etc., and works in conjunction with the speed limiter. Its working principle is: after the speed limiter detects that the elevator is running at overspeed, it triggers the safety gear to enter the working state, the jaws squeeze the guide rail, and the friction between the safety gear and the guide rail increases rapidly, forcing the elevator to stop moving. The traditional safety gear...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a two-way safety gear for preventing accidental movement of the car, aiming to solve th

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