A vacuum cleaner is an electric cleaning apparatus which utilizes a motor to drive blades to rotate at a high speed, to generate a negative air pressure in a sealed housing, and thereby suctioning dusts into a dust bag. Vacuum cleaners can be generally divided into vertical type vacuum cleaners, horizontal type vacuum cleaners, and portable type vacuum cleaners and the like according to the structure. With vacuum cleaners become miniaturized and portable, the improvement in structure and volume of a vacuum cleaner motor, as a core component of a vacuum cleaner, also attracts lots of attentions.
A conventional vacuum cleaner motor generally includes a stator iron core and a rotor, the rotor is fixed on an output rotating shaft, and a load blade is further fixedly arranged on the rotating shaft. Bearings of the rotating shaft are placed at an outer side of each of the load blade and the rotor, that is, at two ends of the rotating shaft, such bearing arrangement is not compact. To fix the bearings, one of the bearings is fixed by a motor hood, and the other bearing needs to be fixed by an additional end cover, thus the structure is complicated and the volume is large. Also, if this structure is employed, the distance between the bearings is generally set large, which may cause a significant vibration and a high noise when the motor operates, and adversely affect the normal use of the vacuum cleaner, and thus is apt to cause premature damage and aging of parts and components in the vacuum cleaner motor, and reduces the service life of the vacuum cleaner.
For avoiding the structural limitations of the conventional vacuum cleaner motor, a motor structure is disclosed in the conventional technology. In the motor structure, one bearing is employed, and the bearing is fixed to a middle part of the rotating shaft, and a load and a rotor are arranged at two ends of the rotating shaft. In this way, to fix the bearing, the bearing can be directly fixed to a motor cover, without additionally providing a component to fix the bearing, thus simplifying the structure of the motor, allowing the entire motor to be compact, and reducing its volume. However, for ensuring the stability and balance in operation of the motor, generally, the bearing is required to be made long, which may lead to a high material cost of the bearing, and an increased production cost of the vacuum cleaner motor.
Therefore, in view of the above issues, it is necessary to provide a new rotor structure, to simplify the structure of the motor, reduce the overall volume of the motor, to enable the bearing to be close to a load as much as possible, reduce the wobble at shaft ends of the rotor, lower the noise, improve the service life of the motor, and also save the material, and reduce production costs.