Rotor of hub motor

Abstract

The rotor comprises a rim, an inner ring body and permanent magnets, the inner ring body is located on the inner side of the rim and fixedly connected with the rim, the permanent magnets are located on the inner side face of the inner ring body, and the two axial ends of the inner ring body are provided with a first installation face and a second installation face respectively. The first installation face and the second installation face are each provided with a plurality of fixing holes, the hole centers of the fixing holes in the first installation face are located on the outer side of the second inner side circumferential face, and the hole centers of the fixing holes in the second installation face are located on the inner side of the second inner side circumferential face. The limitation that the wall thickness of a conventional inner ring body must be larger than the aperture of a fixed thread is broken through, the fixed connection mode of a conventional motor end cover and a rotor is continued through Z-shaped dislocation offset of the fixed holes, the wall thickness of the inner ring body is greatly reduced, and the lightweight design of the motor is achieved.

Description

technical field [0001] The invention relates to a rotor of a hub motor and belongs to the technical field of electric vehicles. Background technique [0002] Electric vehicles are widely used in daily transportation due to their characteristics of light travel, low-carbon environmental protection, energy saving, safety and reliability, and stable performance. With the gradual standardization of national policies, the demand for two-wheeled electric vehicles of the new national standard is increasing day by day, and compliant electric vehicles have strict restrictions on the weight of the whole vehicle, so the pursuit of light weight and weight reduction of the whole vehicle has become the majority of the new national standard The design goals of two-wheeled electric vehicle manufacturers. As the core component of an electric two-wheeled vehicle, the weight of the in-wheel motor occupies a large share in the weight of the vehicle. How to reduce the weight of the in-wheel mot...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the core components of the in-wheel motor used in two-wheeled electric vehicles are the stator and the rotor. The rotor is sleeved outside the stator. The rotor includes the rim, the inner ring body and the permanent magnet. A straight columnar ring made of thick sheet metal. The end faces on both sides of the axial direction are the end faces of the material itself. The wall thickness of the inner ring body must be greater than the diameter of the fixing screw, at least 5mm or more. The part of the inner ring body has excess magnetic circuits but cannot be thinned due to the requirements of the fixed structure. The weight of the inner ring body is heavy, resulting in waste of materials

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