Brake with front outage device

Abstract

The invention discloses a brake with a front outage device. The brake with the front outage device comprises a machine shell, a motor and a controller, wherein an upper cam, a lower cam, an upper microswitch and a lower microswitch are arranged on the machine shell, an upper protruding point and a lower protruding point are arranged on the upper cam and the lower cam respectively, and an upper jogging moving contact and a lower jogging moving contact are arranged on the upper microswitch and the lower microswitch respectively. The brake with the front outage device further comprises the front outage device, wherein the front outage device comprises a controller microswitch which is connected with a signal power source of the controller, and a front outage cam which controls the controller microswitch to be turned on and turned off, a front protruding point is arranged on the front outage cam, and can touch the upper jogging moving contact before the upper protruding point touches the upper jogging moving contact, a signal can be sent to the controller to enable the controller to give out a signal in advance, and the signal given out by the controller indicates that the motor is about to be in an outage. The brake with the front outage device can prevent separation of an outer tube on the situation that a limit switch of the motor is out of operation, the motor and a client platform are protected, quality of products is improved, the service life of the products is prolonged, safety of users is ensured, and potential safety hazards are eliminated fundamentally.

Description

technical field [0001] The invention relates to a brake, in particular to a brake with a front power-off device, which is mainly used on the lifting coil of the elevator. Background technique [0002] A brake is a device that has the functions of decelerating, stopping or keeping a moving part (or moving machinery) in a stopped state, commonly known as brakes and brakes. At present, the brake used on the lifting coil of the elevator is mainly composed of a frame, a brake piece and a control device. figure 1 As shown, its braking member includes an upper cam 1, a lower cam 2, an upper micro switch 10 and a lower micro switch 20, and the upper micro switch 10 is placed above the lower micro switch 20 and is electrically connected to the positive side of the main power supply respectively. To the electrode and the negative electrode, the conduction of the main power supply and the switching of the positive and negative poles can control the forward and reverse actions of the m...

AI Technical Summary

Problems solved by technology

However, if the load is too large, it will cause an instantaneous high current and the upper micro switch cannot be powered off, that is, it will fail. In this way, the lifting coil will always rotate outward, which will cause the lifting screw to break away, damage the motor and the machine, and cause serious damage. or may lead to safety accidents, so there are serious safety hazards

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