Impurity-proof brushless motor structure

CN224537908UActive Publication Date: 2026-07-21GUANGDONG DINGLI MOTOR TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
GUANGDONG DINGLI MOTOR TECH CO LTD
Filing Date
2025-07-04
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

When brushless motors are used underwater, impurities can easily enter the motor, causing malfunctions or burnout. At the same time, the gap between the housing and the mounting base can cause shaking and abnormal noises, resulting in poor structural stability.

Method used

A waterproof ball bearing structure was designed. A waterproof ball bearing is installed between the lower end of the housing and the bearing seat. The inner ring of the bearing is fixed to the housing with glue to form a waterproof and impurity-proof structure. The winding assembly and the fixed seat are bonded together by the waterproof glue layer to provide a bearing support structure.

Benefits of technology

It effectively prevents impurities from entering the motor, reduces shaking and abnormal noise, improves the structural stability and underwater adaptability of the motor, and ensures normal motor performance and long service life.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224537908U_ABST
    Figure CN224537908U_ABST
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Abstract

The utility model discloses a brushless motor structure of preventing impurity, it includes stator subassembly, rotor subassembly, stator subassembly includes fixed base, winding group, and the middle part of fixed base is provided with support column, and winding group is fixedly sleeved in the periphery of support column, and fixed base is provided with the through hole of vertical through and passing through the core part of support column, and rotor subassembly includes the casing, magnetic ring, mandrel, and the magnetic ring is tightly installed in the inner circumferential surface of casing, and the lower end portion of mandrel is rotatably connected with fixed base through inner bearing, winding group fills the waterproof adhesive layer of wrapping, and winding group is bonded with fixed base through waterproof adhesive layer and forms a whole, and the outer edge of fixed base is provided with bearing seat, and the outer bearing is arranged between the lower end portion of casing and bearing seat, and the outer bearing is waterproof ball bearing, and the bearing outer ring of outer bearing is interference fit with bearing seat, and the bearing inner ring of outer bearing is glued and fixed between the lower end portion of casing. The utility model has the advantages of novel structure design, stable structure and good reliability, and can effectively avoid the impurity into the motor interior.
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