Elevator brake adopting dual-braking system and braking method of elevator brake

Abstract

The invention discloses an elevator brake adopting a dual-braking system and a braking method of the elevator brake. Safety and stability of an existing elevator brake are poor. The elevator brake comprises a hydraulic end cover, end cover bolts, brake arms, a brake coil, synchronous bolts, an armature, tongue plate bolts, a tongue plate, a brake shoe friction plate, a manual adjusting bolt, guiding bolts, an adjusting anti-loosening spring, a coil groove, brake springs, a brake fixed plate, a hydraulic cylinder, a flat gasket, a spring gasket and a synchronous plate. According to the elevatorbrake and the braking method of the elevator brake, the contact of the brake shoe friction plate and a brake wheel is assisted by increasing the braking friction faces on the brake arms, the brakingarea is increased, and accordingly the braking force is increased. The braking friction faces of the brake arms and the arc face of the brake shoe friction plate on the tongue plate are located on thesame cylinder face, the brake arms and the brake shoe friction plate synchronously move during braking, and accordingly it is guaranteed that the brake wheel is held tightly at the same time; and elevator dual braking can be achieved, elevator slipping or elevator brake movement is prevented, and the braking reliability of the brake is improved.

Description

technical field [0001] The invention belongs to the technical field of elevator safety devices, and in particular relates to an elevator brake adopting a double braking system and a braking method thereof. Background technique [0002] At present, elevators are used more and more widely, so that safety devices are needed to ensure personal safety. Traditional elevator brakes are generally electromagnetic brakes, which are composed of compression springs, brake electromagnetic mechanisms, brake shoes, brake wheels, transmission and adjustment mechanisms, etc. Its main principle is to control the action of the armature through the generation or loss of electromagnetic attraction when the electromagnetic coil is powered on and off, so as to achieve the purpose of braking. Today, when elevators are widely used in people's daily life, people gradually begin to pay attention to the safety and comfort of elevator operation, and the failure of the brake will cause the elevator to s...

AI Technical Summary

Problems solved by technology

[0004] Electrical problems are mainly due to poor contact or adhesion of the contacts of the control brake, intermittently, causing friction and wear between the brake shoe and the brake wheel, resulting in failure of the braking force

[0005] Mechanical problems mainly include: mechanical jamming causes the brake to fail to close or close slowly after power failure; the brake spring has insufficient pressure due to long-term use, resulting in insufficient braking force; the installation of the armature in the brake is skewed, resulting in serious wear of the friction plate , The contact area between the brake wheel and the friction plate is less than 80%, and the braking force is reduced; the brake spring pressure is insufficient and the friction plate is worn, and the brake spring or friction plate needs to be replaced, resulting in cumbersome disassembly; the electromagnetic coil exists The phenomenon of residual magnetism, when the brake is opened, the force of the electromagnetic coil is greater than the force of the brake spring when the brake is closed, and when the elevator arrives at the station, the brake shoe cannot hold the brake tightly, which is prone to car slipping accidents

However, the brake shoe cannot be tightly held due to the phenomenon of residual magnetism in the electromagnetic coil, which is a difficult point that the existing elevator brake cannot overcome.

[0006] The above problems lead to poor safety and stability of the brake

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