An inner rotor brushless motor

Abstract

The invention discloses an internal rotor brushless motor, and relates to the technical field of motors. The internal rotor brushless motor comprises an upper end cover, a stator assembly, a PCB and a lower end cover which are sequentially arranged from top to bottom, wherein the stator assembly is fixed in the upper end cover, and the internal part of the stator assembly is provided with a rotor assembly; the upper end cover and the lower end cover are tightly connected through a first sealing member, and the PCB is fixed on a split surface of the upper end cover and the lower end cover; and the PCB is connected to a cable, the cable stretches out from the part between the upper end cover and the lower end cover and is sealed together with the upper end cover and the lower end cover through a second sealing member. Under the premise of ensuring effective fixation of the upper end cover, the lower end cover, the stator and the PCB, the internal rotor brushless motor saves additional connecting pieces of the PCB, simplifies the assembly process, improves the compressive strength of the PCB, and achieves the purposes of reducing materials and reducing the manufacturing cost. Meanwhile, reliable connection and excellent sealing between the upper and lower end covers and the cable are realized through arranging the first sealing member between the upper end cover and the lower end cover and arranging the second sealing member on the cable.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to an inner rotor brushless motor. Background technique [0002] Brushless DC motors not only have good dynamic and static speed regulation characteristics of traditional DC motors, but also have simple structure, reliable operation, and easy control, so they are widely used in military industry, aerospace, medical, information, home appliances and other fields. However, the existing inner rotor brushless motor also has the following problems: [0003] First of all, from the perspective of the overall structure of the motor, the existing brushless motor adopts a fixed structure of upper and lower end covers, buffer rubber parts and stators, and the PCB board (printed circuit board) needs to pass through additional connectors, such as screws, buckles, etc. Fixed on the stator or an end cover. In this way, on the one hand, the PCB board cannot bear the pressure of the end cover as a ...

AI Technical Summary

Problems solved by technology

This will greatly increase the difficulty and cost of processing the outer diameter of the motor shaft and the inner diameter of the rotor lamination, and the pressing force is about 6000-8000N, which will also increase the difficulty of the assembly process and increase the assembly cost.

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