High-efficiency and low-noise traction machine

The invention discloses a high-efficiency and low-noise traction machine used for an elevator. The high-efficiency and low-noise traction machine comprises a rack as well as a permanent synchronous motor and a traction sheave, wherein the permanent synchronous motor is arranged on a left rack by virtue of an output shaft, a left bearing and a left bearing cover, the left bearing end cover is contacted with an outer ring of the left bearing, the traction sheave is erected between a middle rack and a right rack by virtue of traction axles, a middle bearing, a middle bearing end cover, a right bearing and a right bearing cover, the middle bearing cover is contacted with the outer ring of the left end of the middle bearing, the right bearing cover is contacted with the outer ring of the right bearing, the traction axle between the middle rack and the traction sheave and the traction axle between the right rack and the traction sheave are respectively provided with a left axle sleeve and a right axle sleeve, the l