Stator core bracket

Abstract

The invention relates to a stator core bracket. The bracket comprises a main bracket body and a secondary bracket body which are formed by stretching raw materials, the main bracket body comprises a main supporting surface and an outer circumferential surface, the secondary bracket body comprises a secondary supporting surface and an outer positioning part, inner holes of the main bracket body andthe secondary bracket body are formed in the outer surface of a shaft sleeve in a clearance fitted mode, the main supporting surface and the secondary supporting surface are inclined towards two sides from inside to outside in the radial direction, and the outer positioning part of the secondary bracket body abuts against the inner surface of the end part of the outer circumferential surface of the main bracket for positioning. The bracket has the advantages that the overall strength is high, load bearing performance of the overall structure is greatly improved by optimizing the structure onthe basis of using the same material, a motor with larger power can be borne by arranging a stator core with a larger size, raw materials are reduced and the cost is saved, concentricity and coaxiality are improved, and the phenomenon of swinging is eliminated as far as possible.

Description

technical field [0001] The invention relates to a motor component, in particular to a stator core support. Background technique [0002] With the continuous development of electric vehicles, electric vehicles are becoming more and more popular as a means of green transportation. They are gradually promoted from flat road areas such as cities to areas with complex road conditions such as rural areas and mountainous areas, especially in rural areas. In terms of agricultural transportation, some conventional electric vehicles for cities have the following problems: insufficient motor power, weak climbing, inability to carry heavy loads, insufficient structural strength during heavy loads, and low load-bearing capacity, which seriously hinder the use of electric vehicles in rural areas. , the use and popularization of mountainous areas. [0003] The stator core support of an electric vehicle is an important load-bearing component. During the working process, the stator support ...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of electric vehicles, electric vehicles are becoming more and more popular as a means of green transportation. They are gradually promoted from flat road areas such as cities to areas with complex road conditions such as rural areas and mountainous areas, especially in rural areas. In terms of agricultural transportation, some conventional electric vehicles for cities have the following problems: insufficient motor power, weak climbing, inability to carry heavy loads, insufficient structural strength during heavy loads, and low load-bearing capacity, which seriously hinder the use of electric vehicles in rural areas. , use and popularization in mountainous areas

[0003] The stator core support of an electric vehicle is an important load-bearing component. During the working process, the stator support not only bears the constantly changing torque and electromagnetic field force of the motor itself, but also bears the impact force of the wheel hub when it is bumped. Gravity, its own structural strength is very important. At present, the stator core of electric vehicles with a power of more than 300W must use a double bracket structure.

[0004] In addition, double brackets are two brackets riveted together to bear the external force, which inevitably has an R angle on the surface of the outer ring of the bracket, such as figure 1 and figure 2 As shown, the stator core is made of laminated silicon steel sheets, and the stator core is press-fitted on the outer ring of the bracket with an interference fit. The surface will be shifted inward, which will increase the air gap between the stator and the rotor, which will increase the air gap and increase the magnetic flux leakage, which will lead to an increase in no-load current and a decrease in output force

In addition, the jumping and swinging of the double brackets are not good, because the double brackets are welded after being pressed into the iron core, which causes deformation during the welding process. In addition, the double bracket process also has a great impact on the coaxiality. At the same time, the stator core bracket and the motor shaft The coaxiality needs to be improved

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