Bidirection overspeed protective device of elevator

Abstract

The present invention relates to an elevator two-way overspeed protection equipment. Said invention includes a rope-clamping device formed from frame body, two energy-storing spring mechanisms, brake frame with movable brake plate, fixed brake plate and unhooking mechanism, two-way speed-limiting device and control rope connected between rope-clamping device and two-way speed-limiting device. It is characterized by that between the movable brake plate and fixed brake plate of described brake frame a wedge-shaped brake plate is formed, and can be upwards slided so as to attain the brake effect. Said invention is reliable and good in brake effect and its safety is high.

Description

technical field [0001] The invention relates to an elevator operation safety protection device, in particular to an elevator bidirectional overspeed safety protection device. Background technique [0002] The existing two-way overspeed protection device for elevators generally consists of a rope clamping device, a two-way speed limiting device and a control rope connected between the two, such as a "two-way overspeed protection device for elevators" disclosed in Chinese patent ZL02263084.8. The rope clamping device is generally composed of a frame body and a second energy storage spring mechanism installed on the frame body, a brake frame with a dynamic brake plate, a custom brake plate, a decoupling mechanism and other components. Among them, the second energy storage spring mechanism device The bottom of the frame body, and the tops of the two energy storage spring mechanisms are connected together by a pin shaft, and the two ends of the pin shaft are inserted into the wai...

AI Technical Summary

Problems solved by technology

However, the rope clamping device of this structure simply adopts the brake plate and the brake plate to brake the elevator car traction wire rope immediately clamped when the overspeed operation occurs, and when an abnormality occurs in the elevator During the overspeed operation, in the actual braking process, this unilateral braking method is very easy to be impacted by the continuous impact force of the elevator car during overspeed operation, resulting in brake slipping or brake failure, thus Lead to the failure of the entire protection device, causing safety accidents in which the elevator car rushes to the top or falls

The two-way speed limiting device consists of a bracket body and a sheave installed on the bracket body in sequence, a fixed friction wheel, a small friction wheel, a centrifugal piece installed on both sides of the sheave, and protruding teeth installed on the centrifugal piece, the amount of compression, etc. The structure of the entire speed limiting device is very complicated and the manufacturing cost is high, which leads to problems such as high failure rate and high maintenance cost.

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