Lift car braking system

Abstract

The invention relates to the technical field of elevators, in particular to a lift car braking system. The lift car braking system comprises a lift car and a well. The lift car is arranged in the well, and guide rails for allowing the lift car to move up and down are arranged in the well. The lift car braking system further comprises a braking box and a dual braking device. The dual braking deviceis arranged in the braking box and comprises a well braking device and a guide rail braking device, the guide rail braking device is located below the well braking device, and the well braking devicedrives the guide rail braking device to conduct braking when conducting braking. The lift car braking system also comprises a speed sensor and a controller, and the speed sensor is fixed to an elevator driver. The signal input end of the controller is connected with the signal output end of the speed sensor, and the signal output end of the controller is electrically connected with the well braking device. Dual braking of the inner wall of the well and the guide rails can be achieved only through one power device; and moreover, a buffer device can be started while braking is conducted, and thus the impact force generated when the lift car touches the ground is reduced.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to a car braking system. Background technique [0002] The elevator is a lifting mechanism powered by a motor. The car is driven by a wire rope to transport personnel and materials. The most common failure in the process of use is the failure of the elevator slide, especially when the car is overweight, and the motor cannot move the car. When the car is rising and the car is accelerating down, the speed limiter will control the safety gear to clamp the guide rail, but the cargo is heavy, and the guide rail is made up of multiple guide rails, so the load-bearing capacity of the guide rail is also limited, and additional braking is required Only when the protection is carried out at the same time can the braking of the elevator be effectively guaranteed. For example, the utility model patent with the patent application number 201420741952.4 provides a method of pressing down the br...

AI Technical Summary

Problems solved by technology

[0002] The elevator is a lifting mechanism powered by a motor. The car is driven by a wire rope to transport people and materials. The most common failure in the process of use is the failure of the elevator slide, especially when the car is overweight, and the motor cannot move the car. When the car is rising and the car is accelerating down, the speed limiter will control the safety gear to clamp the guide rail, but the cargo is heavy, and the guide rail is made up of multiple guide rails, so the load-bearing capacity of the guide rail is also limited, and additional braking is required Protection at the same time, in order to effectively ensure the braking of the elevator

For example, the utility model patent with the patent application number 201420741952.4 provides a method of pressing down the brake pad by the pressure transmission rod, so that the brake pad and the inner wall of the hoistway can be braked by friction, but the braking method is single and there is no lasting and stable pressure. then the effect of braking will not be achieved

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