Outer rotor motor

Abstract

The invention relates to an outer rotor motor, comprising an outer rotor, a rotating shaft, a stator iron core, a first bearing, a second bearing and an end cover. The inner hole of the stator iron core is provided with a first bushing in a pressing manner; the first bearing and the second bearing have the same specification and are both arranged in the first bushing. The first bearing is arranged at the end of the first bushing close to one end of the outer rotor, and the second bearing and the first bearing are separated by a second bushing. A third bushing is clamped between one end of therotary shaft close to one end of the inner cavity of the end cover and the second bearing by a gasket. The end of the rotary shaft close to one end of the outer rotor is provided a guiding part convenient to press and mount by the rotating shaft. The first bearing and the second bearing n are mounted in the same part so as to ensure the concentricity of two mounted bearings; during the operation of the motor, the two bearings are not easy to vibrate, the outer rotor is not easy to move up and down, thus, the motor of the outer rotor has low noise and less bounce.

Description

technical field [0001] The invention relates to an external rotor motor. Background technique [0002] External rotor fans have been widely used in hotels, large parking lots, buildings, offices, luxury residences and other indoor ventilation and exhaust equipment, air conditioning units, air purification systems, range hoods, equipment cooling and other fields. The outer rotor fan adopts the structure and aerodynamic design method that the outer rotor motor directly drives the impeller to rotate. It has the characteristics of high efficiency, low noise, light weight, compact structure, and convenient installation and maintenance. [0003] Such as figure 1 As shown, the current conventional outer rotor motor is equipped with two bearings, one is installed in the bearing chamber on the bottom surface of the end cover, and the other is placed in the bearing seat at the other end of the stator core. The bearing seat and the iron core are not a whole. It is a separate part, an...

AI Technical Summary

Problems solved by technology

The two bearings are placed in two separately processed parts, and the specifications of the bearings are different, so it is difficult to control the concentricity of the two bearings after assembly

The bearings of different spindles will vibrate during the rotation process, which will drive the outer rotor to beat, resulting in severe deflection and noise when the impeller rotates.

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