Permanent magnetic synchronous arm rest lift traction machine

Abstract

A permanent magnetic synchronous escalator tractor, a prime move of which adopts a permanent magnetic synchronous motor of the permanent synchronous magnetic technique, transforms the output of the permanent magnetic synchronous motor into the output of the escalator tractor through a retarding mechanism. The permanent magnetic synchronous motor and a gear retarding and transmitting structure are fixed on a tractor base; the gear retarding and transmitting structure is a primary gear transmitting structure, wherein a high-speed gear shaft is a motor shaft of the permanent magnetic synchronous motor; a low-speed gear shaft is an output shaft of the permanent magnetic synchronous escalator tractor; the high-speed gear shaft and the low-speed gear shaft are in pair connection through gears; the work efficiency of the permanent magnetic synchronous escalator tractor of the structure can normally reach from 0.87 to 0.9. Compared with prior escalator tractors, the work efficiency is raised by from 40 to 50 percent; the tractor can be used in driving an automatic escalator and a moving sidewalk. Because the permanent synchronous magnetic technique and the high-efficiency primary helical gear transmission are adopted, a quite high transmitting efficiency can be achieved, the effect of energy saving and environment protection is achieved as well.

Description

technical field [0001] The invention relates to a traction machine used on an escalator or a moving walk. Background technique [0002] Due to the application occasion of the escalator traction machine, the biggest feature of the escalator traction machine is low speed and high torque. The output speed of the current escalator traction machine is generally around 40rpm, which is obviously impossible for the traditional three-phase AC asynchronous motor. And because the torque required to lift the escalator is very large, generally 1100-3000N.m, the traditional escalator traction machine is composed of two parts: the motor and the reducer. Generally, the motor is a three-phase AC asynchronous motor, which is the prime mover of the traction machine, and then a worm gear reducer is used to reduce the speed and increase the torque. The advantage of worm gear transmission is that it is easy to get a large single-stage transmission ratio; but its disadvantage is also obvious, th...

AI Technical Summary

Problems solved by technology

Due to the high reduction ratio of this traction machine, the efficiency will inevitably be greatly reduced.

Moreover, it is only the mechanical assembly of the asynchronous motor and the gear reducer, which cannot achieve an organic combination, and it is difficult to guarantee the mechanical and electrical performance of the product.

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