Novel series excited machine double-insulation structure

Abstract

The invention discloses a novel series excited machine double-insulation structure which comprises a rotating shaft, an insulation sleeve and an iron core, wherein the insulation sleeve is coaxially assembled in the bore of the iron core, the rotating shaft is coaxially arranged in the insulation sleeve, an insulation commutator is assembled on the rotating shaft, and an insulation structure is arranged between one end face of the insulation commutator and the rotating shaft. Through the mode, the novel series excited machine double-insulation structure has simple processes and high precision, and the insulation sleeve is a ground part and has small jump; the product development is simpler, the insulation sleeve is formed by cutting so that the length of the insulation sleeve can be randomly changed, and the novel series excited machine double-insulation structure has economical efficiency; and the comprehensive cost is lower, because of the further improvement of the insulation sleeve technology and mass production, the comprehensive cost is greatly lowered, and the novel series excited machine double-insulation structure has good reliability.

Description

technical field [0001] The invention relates to the field of micro-motor manufacturing, in particular to a novel series-excited motor double-insulation structure. Background technique [0002] Series motors are widely used in various occasions such as electric tools, vacuum cleaners, and household appliances; double insulation is a motor insulation structure, which is used in some products with a high risk of breakdown and electric shock. A layer of additional insulation is added between them, which together with the basic insulation between the original rotor core and the enameled wire is called double insulation. The withstand voltage standard of supplementary insulation, 3000V, 1s, leakage voltage <5mA. [0003] For a long time, BMC (unsaturated polyester bulk molding compound) material has been used for additional insulation to bond it to the shaft through injection molding or injection molding. Defects in the prior art: [0004] 1. Due to the low precision of this ...

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Problems solved by technology

[0004] 1. Due to the low precision of this process, the finished shaft must undergo secondary grinding to achieve the required precision (dimensional tolerance, runout relative to the center hole, etc.);

[0005] 2. There may be insufficient filling or lack of material in injection molding or pressure injection BMC, which will lead to high voltage breakdown, and this unreliability is not easy to detect, because the detection during the product manufacturing process will hit high voltage several times, and it is also possible during the period lead to breakdown;

[0006] 3. It is necessary to increase the injection molding equipment. The smoke generated by injection molding will pollute the environment to a certain extent, especially the factory area will become smoky and affect normal production, especially in summer, employees are unwilling to do this process;

[0007] 4. Increase the difficulty of production management, and the increase in process will lead to additional product quality problems. If it is processed outside, it will also increase the workload of purchasing outsourcing services and the mobilization of parts;

[0008] 5. As long as the size of new product development is slightly different or needs to be changed during the development process, new molds need to be opened, which is costly and difficult to change molds, resulting in waste

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