Elevator cable brake

Abstract

A main cable brake of an elevator, including a main cable clamping mechanism, a trigger and a reset mechanism, characterized in that the clamping mechanism is composed of a left clamp body, a right clamp body and a connecting plate connecting the two, and the main steel cable passes through it. Pass through; the left clamp body is composed of the left base body, the wedge block and the roller plate placed between the two, and the low-friction sliding can be realized on the left base body through the roller plate wedge block; the wedge block is connected with the trigger and reset mechanism Connection, triggered and reset by it; the right clamp body is composed of a right base body, a slide plate, a guide plate, an energy storage spring, an adjusting gasket, and a sliding shaft. The sliding shaft fixed on the guide plate can slide in the hole of the right base body, and the slide plate It can slide along the surface of the guide plate; the slide plate is also connected with the right base through an auxiliary mechanism, and the auxiliary mechanism can assist the reset of the clamping mechanism. The brake has low cost and is easy to install. It can be used in conjunction with a non-two-way speed limiter as an electrical trigger and can be automatically restored.

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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