Brushed DC torque motor stator magnetic steel protection structure and forming method thereof

Abstract

The invention relates to a brushed DC torque motor stator magnetic steel protective structure and a construction method thereof. The structure includes a plurality of first magnetic steel blocks and aplurality of second magnetic steel blocks of opposite polarities, a magnetically conductive ring and a magnetic steel cover. The magnetically conductive ring is a ring-shaped structure with a rectangular cross section. The magnetic steel cover is composed of a cylindrical steel cover main body and first and second outer hemming portions. The magnetic steel cover and the magnetically conductive ring are in coaxial fit with each other inside and outside. The inner circumferential surface of the magnetically conductive ring, the outer circumferential surface of the magnetic steel cover main body, and the inner end surfaces of the hemmings at both ends of the magnetic steel cover define a closed space. The plurality of first magnetic steel blocks and the plurality of second magnetic steel blocks are alternately disposed in the closed space in the circumferential direction. Adhesive gaps are formed between the adjacent magnetic steel blocks to form a multi-pole magnetic steel component. The outer circumferential surface of the magnetic steel component is connected to the inner circumferential surface of the magnetically conductive ring by suction. An adhesive gap is arranged between the inner circumferential surface of the magnetic steel component and the steel cover main body. One end of the magnetic steel component is in close contact with the inner end of the first hemming portion. An adhesive gap is arranged between the other end of the magnetic steel component and the inner end of the second hemming portion. The adhesive gaps are filled with an epoxy resin adhesive. The brushed DC torque motor stator magnetic steel protective structure realizes totally-closed protection for magnetic steel.

Description

technical field [0001] The invention belongs to the motor assembly technology, relates to the motor stator magnetic steel protection technology, in particular to a stator magnetic steel protection structure and a forming method of a DC torque motor with a brush. Background technique [0002] At present, the stator magnets of brushed DC torque motors are mostly made of NdFeB permanent magnet materials, and the multi-pole magnetic poles N and S are bonded to the surface of the stator shell alternately to provide a constant electromagnetic magnetic source for the motor. However, during long-term use, since the NdFeB magnetic pole material contains a large amount of neodymium and iron, it is easy to be oxidized and corroded, which will greatly reduce the magnetic performance of the magnetic pole and the mechanical performance of the motor. There are two commonly used anti-corrosion methods for magnetic poles. One is to coat the surface of the magnetic pole with a protective laye...

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Problems solved by technology

[0003] No technical solution similar to this patent was found after searching the prior art

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