Elevator cable brake

Abstract

The elevator cable brake includes main cable holding mechanism, and triggering and resetting mechanism, and features that the main cable passes through the main cable holding mechanism comprising right clamp, left clamp and their connecting board; the left clamp consists of left base body, wedge and roller plate in between and can realize low friction sliding; the wedge is connected to the triggering and resetting mechanism for triggering and resetting; the right clamp consists of right base body, sliding plate, guide plate, accumulating spring, regulating washer and sliding shaft capable of sliding inside the holes of the right and left base bodies; and the sliding plate can slide in the surface of the guide plate and may be connected to the right base body via auxiliary mechanism for assisting the reposition of the holding mechanism. The elevator cable brake has low cost and easy installation, and may be triggered electrically and restored automatically.

Description

Technical field [0001] The invention relates to a safety device for decelerating or stopping an elevator by clamping the main rope of the elevator under abnormal conditions. Background technique [0002] In the past, the elevator only had a downward braking device, and there was no special upward protection device. With the occurrence of the elevator roof accident, all countries have added the content of uplink overspeed protection to the elevator specifications, and the research and development and promotion of this protection device in the industry have also been fully launched. As the main cable brake is an independent component in the elevator machine, it is easy to manufacture; and it has little correlation with other parts on the elevator, so it can be easily installed no matter in the case of a new elevator or an old elevator renovation, so it is obtained widely used. [0003] The action principle of the existing main cable brake is mainly as follows: [0004] 1. T...

AI Technical Summary

Problems solved by technology

[0006] In the first solution, an external energy storage device is required, and the energy stored in the device needs to be effectively confirmed, which makes the mechanism complicated and the cost is high

[0007] In the second solution, since the force of the elastic element will gradually decrease during the release process, and it takes a certain stroke to drive the brake element to clamp the main cable, so it needs to maintain a large force in the pre-tightened state , and have sufficient preload travel, which will directly lead to an increase in the volume of the elastic element and an increase in cost

In addition, when the main cable brake is reset, it is necessary to do a lot of work to restore the elastic element to a larger pre-tightening force and a larger pre-tightening stroke, and the recovery is more difficult.

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