Additional brakes for escalators

Abstract

The invention relates to an additional brake apparatus of an escalator. The additional brake apparatus comprises a brake frame, a connecting rod, a resetting portion, a pawl frame, a pawl, a support and a pawl wheel. The connecting rod is arranged at an end of the brake frame, the resetting portion can be reset by the aid of the gravity and is matched with effects of the connecting rod, the pawl frame is connected with the connecting rod, the pawl is pivotally connected onto the pawl frame, the brake frame is fixed by the aid of the support, the pawl wheel is matched with the pawl and is provided with a driving spindle, the connecting rod is pivotally connected with the pawl by a connecting rod shaft, and the pawl can be driven by the connecting rod to rotate when the connecting rod linearly moves. The additional brake apparatus has the advantages that an existing spring can be replaced by the resetting portion which can be reset by the aid of the gravity, accordingly, the additional brake apparatus is good in reliability and free of maintenance, elasticity of the spring does not need to be regulated, and the maintenance cost can be greatly reduced; the escalator can assuredly safely stop running, so that accidents can be prevented; the additional brake apparatus is simple in structure and short in brake distance and is low in deceleration during braking, and stable braking effects can be realized.

Description

technical field [0001] The invention relates to an additional braking device for an escalator. Background technique [0002] The escalator is a fixed electric drive device with circular running steps, which is used to transport passengers upward or downward. It has the characteristics of continuous operation and large transportation volume. It is widely used in subways, light rails, stations, airports, etc. Vertical transportation in public places such as wharves, shops and buildings, its structure is mainly composed of steps, step drive devices, drive hosts, transmission parts, tension devices, handrail devices, metal structures, step guide rails, upper and lower cover plates, comb plates, additional system However, when the safety circuit of the escalator is damaged due to various faults, especially when the traction chain is broken, the escalator will quickly fall under the action of its own weight and the weight of people and objects on the steps. If there is no effecti...

AI Technical Summary

Problems solved by technology

Among them, the return spring 3 is prone to failure after long-term use, and needs to be replaced and repaired frequently. In addition, the elastic force of the return spring needs to be adjusted by adjusting the connecting rod 2 during maintenance, which makes maintenance inconvenient, and the linkage needs to be realized through a cross bar. Complicated, unstable braking, large deceleration when braking, and long braking distance

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