A rotor skew pole structure

By designing positioning slots and assembly slots on the rotor lamination unit and using injection molding and riveting techniques to form a stable rotor structure, the problem of large skew pole error in hollow shaft motors has been solved, improving production efficiency and motor performance.

CN224438623UActive Publication Date: 2026-06-30WUHU BETHEL ELECTRONICS CONTROL SYST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
WUHU BETHEL ELECTRONICS CONTROL SYST
Filing Date
2025-06-23
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In existing hollow shaft motors, the conventional segmented skewed pole method cannot effectively reduce the tooth cogging friction, resulting in large skewed pole errors and low production efficiency during the production process, and it is not suitable for mass production.

Method used

The rotor lamination unit design includes a positioning slot and an assembly slot. The injection molded body is placed in the assembly slot, and the magnets are placed between the injection molded bodies. The positioning slot is offset along the centerline of the adjacent assembly slots. A stable rotor structure is formed by riveting and injection molding.

Benefits of technology

It improves the accuracy of the skew pole angle, enhances the consistency of motor tooth cogging friction, reduces skew pole error in the production process, and improves production cycle time and efficiency. It is suitable for rotor skew pole structures in hollow shaft scenarios.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224438623U_ABST
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Abstract

The rotor skewed pole structure provided by this utility model includes a rotor lamination unit and an injection-molded body disposed on the rotor lamination unit. The rotor lamination unit is provided with a positioning groove and an assembly groove. The injection-molded body is disposed in the assembly groove, and magnets are disposed between the injection-molded bodies. The positioning groove is offset along the centerline of the adjacent assembly groove, which can improve the accuracy of the skewed pole angle, improve the consistency of motor tooth cogging friction, reduce skewed pole assembly errors caused by the production process, improve the production cycle of the rotor skewed pole structure, and improve the production efficiency of the skewed pole structure.
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