Traction device provided with safety tongs

Abstract

The invention discloses a traction device provided with safety tongs. The traction device comprises an elevator control system used for controlling an elevator to operate, a tractor, a traction wheelconnected with the tractor, and a traction rope wound around the traction wheel. One end of the traction rope is connected with a car platform sill, and the other end of the traction rope is connectedwith a counter-weight. The traction wheel is in coaxial connection with a worm wheel. A worm is engaged with the worm wheel, and thus a locking mechanism of the traction wheel is formed. The worm isconnected with a protecting motor. Servo motors are adopted as the protecting motor and the tractor. The synchronous controller controls the rotating speed of the tractor and the protecting motor according to the transmission ratio of the worm and the worm wheel, and thus the rotating speed ratio of the worm and the worm wheel keeps synchronous with the transmission ratio of the worm and the wormwheel. When the load of the protecting motor surpasses the maximum set value, the elevator control system cuts off a power source of the protecting motor and the tractor. The car platform sill is provided with the car platform sill safety tongs. According to the traction device, when an elevator system is powered off or breaks down, reliable braking of the traction wheel is achieved, and the safety accidents of up-going and collapsing of the car platform sill are effectively avoided.

Description

technical field [0001] The invention relates to the technical field of elevator manufacturing, in particular to an elevator traction mechanism with high safety. Background technique [0002] In high-rise buildings, the elevator is a necessary accessory equipment, which can bring great convenience to the occupants. At present, with the development of the economy, a large number of middle and high-income groups have emerged, and the demand for villas is also increasing. Correspondingly, home elevators suitable for villa buildings have also become popular. The elevator mainly includes a shaft, a car that can be lifted and lowered in the shaft, and a drive mechanism for driving the car to go up and down. The traction machine is connected to the traction wheel, and a traction rope is wound around the traction wheel. One end of the traction rope is connected to the car, and the other end is connected to a counterweight that can be lifted and lowered in the hoistway, so as to bala...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of difficult reliable braking and low safety existing in the existing elevator traction mechanism, and to provide a traction device with safety gear, which can be realized when the elevator system fails or fails. The reliable braking of the traction sheave can effectively avoid the safety accident of the car jumping to the top or squatting at the bottom

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