Outer rotor type permanent magnetism synchronization gear wheel free traction machine

Abstract

The invention provides an external rotor permanent magnetic synchronous no-gear tractor, comprising a frame, an internal stator which is arranged on the frame, an external rotor which is arranged at the external side of the internal stator, a rotation shaft which is arranged on the frame by a bearing, and a traction wheel which is fixed on the rotation shaft and is fixedly connected with the external rotor; the external rotor permanent magnetic synchronous no-gear tractor is characterized in that the front end of the rotation shaft is provided with a spoke; the spoke and the shaft are a structure integrally cast; the traction wheel is fixed on the spoke. Compared with the prior art, the external rotor permanent magnetic synchronous no-gear tractor has the advantages of small jumping of surface of the traction wheel trough, high concentricity of rotor, convenient replacement of traction wheel, compact structure of whole machine, low height of whole machine, being used in no-machine rooms.

Description

technical field [0001] The invention relates to a traction machine, in particular to a permanent magnet synchronous gearless traction machine for elevators. Background technique [0002] The structure of the existing external rotor permanent magnet synchronous gearless traction machine is as follows: figure 1 As shown, the traction sheave is installed on the front end of the shaft, and the rotor is installed on the inner end face of the traction sheave. On the one hand, in order to control the cantilever from being too long, on the other hand, to save the material of the traction sheave and control the length of the whole machine, the matching section between the traction sheave and the shaft is relatively short. Therefore, the following problems often occur in production: 1. The runout of the pulley groove surface is out of tolerance; 2. The coaxiality error of the traction sheave will be transmitted to the rotor, resulting in serious runout of the outer surface of the rot...

AI Technical Summary

Problems solved by technology

On the one hand, in order to control the cantilever from being too long, on the other hand, to save the material of the traction sheave and control the length of the whole machine, the matching section between the traction sheave and the shaft is relatively short. Therefore, the following problems often occur in production: 1. The runout of the pulley groove surface is out of tolerance; 2. The coaxiality error of the traction sheave will be transmitted to the rotor, resulting in serious runout of the outer surface of the rotor; 3. Due to the large cumulative error, the rotor and the shaft often have misalignment

In view of the above problems, Chinese patent 200610050802.9 (small permanent magnet synchronous gearless traction machine) proposes a structure in which the traction wheel and the shaft are cast as one. During processing, the traction wheel and the shaft are processed at the same time, which can overcome the existing external rotor. The above-mentioned problems exist in the permanent magnet synchronous gearless traction machine, but because the traction sheave is a wearable part, it needs to be replaced after wear, and when the structure is replaced, it needs to be replaced together with the rotating shaft, and when replacing, the rotor must be pulled out completely , very inconvenient to operate

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