Elevator braking device and method

Abstract

The invention discloses an elevator braking device and an elevator braking method. The elevator braking device carries out two-way braking on a steel wire rope or a guide rail. The elevator braking device comprises at least one pair of fixed clamping blocks, at least one pair of movable clamping blocks, a driving mechanism and friction plates, wherein the movable clamping blocks can make reciprocating motion relative to the fixed clamping blocks and are positioned at the two sides of the steel wire rope; the driving mechanism drives the movable clamping blocks to move; the friction plates are arranged on the corresponding movable clamping blocks and are in frictional contact with the steel wire rope; and the fixed clamping blocks and the movable clamping blocks are mutually matched in a wedge-shaped block manner. Through the matching of the front and back wedge-shaped faces of the fixed clamping blocks and the movable clamping blocks, two-way braking on the steel wire rope and the self-locking effect are realized, so that the braking purpose is reached, safety failure is avoided, and serious accidents resulting in casualties are reduced. The elevator braking device is simple in structure, convenient to mount, and small in floor area, and can be mounted in an elevator machine room or beside a traction machine; old elevator transformation is facilitated; and the problem that the conventional elevator has no safety brake mounting position is solved.

Description

technical field [0001] The invention relates to an elevator braking device and method. Background technique [0002] With the development of urban construction and the improvement of people's quality of life, when residents can enjoy good land public transportation services when traveling, they also desire to obtain convenient vertical transportation in their residences. Therefore, in recent years, the number of elevators has grown rapidly, and the number of elevators in the country has increased from 285,000 in 2003 to 3,009,300 in 2013. As a special means of transportation, the elevator is an indispensable means of transportation for ordinary people. It brings unprecedented convenience to people's daily life. The safety and reliability of its operation are issues that many people are generally concerned about. The quality of residential elevators is good. It directly affects the quality of life of ordinary people. In 2014, the General Administration of Quality Supervision...

AI Technical Summary

Problems solved by technology

[0003] 1. When the elevator stops at the floor, after the hall door and the car door are opened, passengers and goods enter and exit the car. At this time, it cannot be ruled out that the overload and vibration cause insufficient braking force of the working brake, and there is oil on the braking surface, and the mechanical parts of the brake fail. Such as brake pad wear, energy storage compression spring aging and plastic deformation, etc.;

[0004] 2. Although the brake has sufficient braking force, there will still be overload and vibration, which will cause the steel wire rope to slip on the traction wheel due to insufficient traction (there is oil on the contact surface between the steel wire rope and the traction wheel, and the steel wire rope will become thinner after long-term use. The contact surface with the traction wheel groove is reduced, the working surface of the traction wheel is worn, the replacement of unqualified traction wheels, etc.); and once the braking force or traction force is insufficient, it will cause serious accidents of casualties;

[0005] 3. The control unit of the frequency converter is faulty, and the wrong command is issued, causing an accident of opening the door and walking the ladder

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