Water-cooled motor stator iron core fixing structure and fixing method thereof

Abstract

The invention discloses a water-cooled motor stator iron core fixing structure and a fixing method thereof. According to the fixing structure, a stator iron core and a water channel pressing plate are connected rigidly by utilizing steel pins and colloid injected into a shell, the water channel pressing plate and the stator iron core, the water channel pressing plate is also connected with the shell rigidly, and therefore fixation of the stator iron core is achieved. The fixing structure enables air gaps between a stator and a rotor of a water-cooled motor to be more even and motor torque output to be stable, and noise can be lowered effectively. According to the fixing method of the water-cooled motor stator iron core fixing structure, the hot press fitting technology does not need to be adopted, only a common press fitting technology is needed, the technology is simple, and assembling cost can be reduced. When the hot press fitting technology is adopted, the risks of uneven deformation exist in heating and cooling deformation processes, the unevenness can be transmitted to the air gaps between the stator and the rotor, and the performance of the motor is further influenced, but no mentioned risks exist in the fixing method of the water-cooled motor stator iron core fixing structure.

Description

technical field [0001] The invention belongs to the field of motor magnetic circuit parts, in particular to a stator core fixing structure and a fixing method of a water-cooled motor. Background technique [0002] At present, most of the motors used in electric vehicles are water-cooled motors. The reason is that compared with air-cooled motors, water-cooled motors can reach 1.5-2 times the power and torque of air-cooled motors under the same volume. Under the premise of requiring the same power and torque, the use of water-cooled motors can reduce the weight, which is very important for increasing the driving range of electric vehicles. [0003] The stator and windings generate a rotating magnetic field, provide a magnetic field path, and transmit torque to the housing. Therefore, the relative static of the stator core and the housing has a significant impact on the performance of the motor, and there is no relative movement in the axial and circumferential directions. The...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned fixing method adopts a hot pressing process. In order to expand the shell, it is necessary to use baking equipment to bake the shell, which increases the manufacturing cost.

At the same time, this hot pressing process also has a large hidden danger. The shell is heated and expanded and then cooled, and there is a risk of uneven deformation. After the assembly is completed, it will have a negative impact on the air gap between the stator and rotor of the motor, resulting in uneven air gap. , resulting in large torque fluctuations, large noise and other problems

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