Processing method for small motor commutator assembly and small motor and equipment mounted with said commutator assembly

Abstract

The method for processing commutator components and small motor and equipment mounted with the said commutator components characterizes by injection moulding method to get the commutator components, either to secure its technical parameters of concentricity, arc radian and verticality or to reduce its process cost with good prospect in batch production and further smaller motors so as to provide high rotation, longer life and stronger vibration small motors for the portable equipments.

Description

Technical field [0001] The present invention relates to a small motor commutator subassembly with an optimized structure. The present invention also relates to a method for processing the commutator subassembly. Finally, the present invention also relates to a small electric motor, which can deliver the rotation speed efficiently to toys, digital Equipment such as cameras, small audio systems, portable personal communication systems, etc. Background technique [0002] With the improvement of people's living standards, higher requirements are put forward for the miniaturization and weight reduction of portable personal devices, and the small motors used to provide power and vibration information for these devices tend to be more miniaturized. This small motor includes a cylindrical shell, a bearing cavity inside the cylindrical shell, a magnet stator around the bearing cavity, a commutator assembly with a central shaft connected to the central shaft, and a tail cover for powe...

AI Technical Summary

Problems solved by technology

In the above several processes, it is the most difficult to fix the commutator slices at the end of the fixing ring with the setting ring. As we all know, in the small motor of Φ6, the width of the commutator slices is only less than 0.6mm, and the diameter of the tail end is only 1.2mm , it is difficult to imagine how difficult it is for workers to be precise in such a small size

And mass mechanized assembly is simply impossible

If you are not careful, the two commutator pieces will be too close, which will easily cause a short circuit and make the motor not work properly.

Or when the commutator is installed, the commutator is tilted, which will easily cause the shape of the commutator to be out of round or elliptical, which will cause commutation sparks of the brush and shorten the life of the motor.

Moreover, this method of assembling rectifier components has low yield, difficult processing, and high cost, making it difficult to compete with other similar products. On the other hand, this processing technology is difficult to realize the miniaturization of small motors in the true sense

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