Small-sized permanent magnet synchronous gearless traction machine

The utility model relates to a small-sized permanent magnet synchronous gearless machine which belongs to the technical field of a lifting facility. The gearless machine comprises a stand, an arrester, a coder, a towing wheel, a main shaft and a permanent magnet synchronous machine, wherein, the left and the right of the stand are provided with a pair of a first and a second bearing supports which have a first and a second mounting holes at the centers; the towing wheel is arranged in the stand and sleeved and fixed on the main shaft which is supported on the first and the second bearing supports through a first and a second bearings; the permanent magnet synchronous machine is an inner rotor permanent magnet synchronous machine and is fixed at the outer side of one end of the stand; the arrester is a disc brake and is fixed at the outer side of the other end of the stand; the coder is fixed on the arrester and is connected with the main shaft through the rotating shaft of the coder. The small-sized permanent magnet synchronous gearless machine has the advantages that the running stationarity of the main shaft can be improved, the noise can be lowered and the service life can be prolonged; the safety performance for using the whole machine can be improved, and the sizes of the bearings can be effectively reduced; the volume is small, the thickness is thin, the carrying ability is large, and the installation and the maintenance are convenient; a rope off pole used on the traditional gearless machine can be left out.