Internal rotor brushless motor

Abstract

The invention discloses an inner rotor brushless motor, which relates to the technical field of motors. The motor includes an upper end cover, a stator assembly, a PCB board and a lower end cover sequentially arranged from top to bottom, wherein the stator assembly is fixed in the upper end cover, and a rotor assembly is installed inside the stator assembly; the upper end cover and the lower end cover pass through a first seal The parts are tightly connected, and the PCB board is fixed on the middle surface of the upper end cover and the lower end cover; the PCB board is connected with a cable, which extends from the upper end cover and the lower end cover, and passes through the second seal and the upper end cover and the upper end cover. The lower end cap is sealed. On the premise of ensuring the effective fixing of the upper and lower end covers, the stator and the PCB board, the present invention saves the additional connecting parts of the PCB board, simplifies the assembly process, improves the compressive strength of the PCB board, and achieves the reduction of materials and manufacturing costs. At the same time, by arranging a first sealing member between the upper and lower end caps and a second sealing member on the cable wire, the reliable connection and good sealing of the upper and lower end caps and the cable wire are realized.

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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