Pump and washing device

Abstract

The invention provides a pump and a washing device. The pump comprises a driving device, and the driving device is provided with a driving shaft, a rotor assembly sleeving the driving shaft, a statorassembly located at the periphery of the rotor assembly and a plastic connecting piece arranged between the rotor assembly and the driving shaft. The plastic connecting piece is provided with a firstwall spaced between the rotor assembly and the shaft wall of the driving shaft, at least one cavity extending along the axial direction of the driving shaft is formed in the first wall, one end of thecavity is sealed, and an opening is formed at the other end of the cavity, so that the weight of the rotor assembly is reduced, the rotational inertia of the rotor assembly is reduced, the influenceon the concentricity of the rotor assembly is reduced, the noise and the abnormal vibration generated between the rotor assembly and the driving shaft are reduced, and the rotor assembly can be controlled more accurately.

Description

technical field [0001] The invention relates to the field of household appliances, in particular to a pump and washing equipment. Background technique [0002] With the development of brushless motors, especially the promotion and application in the field of household appliances, brushless motors are highly recognized for their advantages such as high power density and high efficiency. Brushless motor is an industry that has developed rapidly in recent years, and many processes need to be improved. [0003] In the prior art, the weight of the rotor core and plastic parts in the brushless motor is relatively heavy. During the operation of the motor, the moment of inertia of the rotor is large, and the adjustment amount during dynamic balancing is large. In the high-speed rotation of the motor, the concentricity is not good. , so that the motor produces abnormal vibration and noise, resulting in poor operation of the motor, which directly affects the work of the motor. Cont...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the weight of the rotor core and plastic parts in the brushless motor is relatively heavy. During the operation of the motor, the moment of inertia of the rotor is large, and the adjustment amount during dynamic balancing is large. In the high-speed rotation of the motor, the concentricity is not good. , causing the motor to generate abnormal vibration and noise, resulting in poor operation of the motor and directly affecting the work of the motor

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