Outer rotor structure of brushless motor and surface treatment method thereof

Abstract

The invention belongs to the field of brushless motors, and particularly relates to a brushless motor outer rotor structure and a surface treatment method thereof. The rotor comprises a rotor shaft, an impeller and a magnetomotive structure, the impeller is arranged on the rotor shaft in a sleeving mode, and an anti-skid structure is arranged at the joint of the impeller and the rotor shaft. The anti-skid structure comprises a radial anti-skid structure and an axial anti-skid structure; the impeller comprises fan blades and a sleeve formed by extending in the axial direction of the rotor shaft. The magnetomotive structure comprises a magnet yoke and a magnetic shoe; the magnet yoke is provided with a clamping groove used for assembling the magnetic shoe, and the magnet yoke is fixedly arranged in the sleeve. The magnet yoke is of an annular structure and is matched with the inner wall of the sleeve in an anti-skid mode. Through the reasonable structural design, the assembling difficulty of the whole outer rotor structure is greatly reduced, the concentricity of the impeller, the rotor shaft, the magnet yoke and other structures can be effectively improved while the stability of the whole structure is ensured, and meanwhile the materials of the impeller, the rotor shaft, the magnet yoke and other components are reasonably adjusted and improved.

Description

technical field [0001] The invention belongs to the field of brushless motors, in particular to an outer rotor structure of a brushless motor and a surface treatment method thereof. Background technique [0002] The brushless motor is a typical mechatronic product, and the outer rotor brushless motor is a typical brushless motor with an outer rotor structure. Compared with the inner rotor brushless motor of the same size, the outer rotor brushless motor has the advantages of large torque, large moment of inertia, easier heat dissipation, and greater flatness ratio. More and more products that require high torque and high speed use the external rotor direct motor. Drive motors, such as drones, model airplanes, electric chain saws, lawn trimmers, etc. [0003] The rotor shaft of the low-power external rotor brushless motor and the motor yoke (steel ring sleeve) are generally combined by press-fitting or stamping with interference fit or bonding with glue. The yoke of the out...

AI Technical Summary

Problems solved by technology

[0006]In order to solve the poor structural stability of the existing brushless motor outer rotor, due to its complicated structural components, it is easy to produce different degrees of misalignment during the assembly process, resulting in uneven structure The weight is large, and it is easy to cause problems such as poor motion stability due to material factors during actual use. The invention provides a brushless motor outer rotor structure and a method for further surface treatment

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