A hub motor transmission mechanism for increasing braking torque

CN224438710UActive Publication Date: 2026-06-30BAFANG ELECTRIC (SUZHOU) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
BAFANG ELECTRIC (SUZHOU) CO LTD
Filing Date
2025-06-13
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The existing hub motors have insufficient torque design, resulting in insufficient power on steep slopes or under heavy loads, and the insufficient braking torque poses a safety hazard. The key pin anti-rotation method is prone to failure after long-term use.

Method used

The system employs two sets of planetary gear mechanisms and an electromagnetic braking mechanism in series. The planetary gear mechanism achieves two-stage speed reduction through first-stage and second-stage planetary gear assemblies, increasing torque output. The electromagnetic braking mechanism achieves parking lock through the cooperation of permanent magnets and clutch plates, preventing key pin failure.

Benefits of technology

It enhances the wheel hub motor's climbing ability and acceleration response speed, improves braking reliability and safety, avoids the risk of slippage, and extends the motor's service life.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224438710U_ABST
Patent Text Reader

Abstract

This utility model discloses a hub motor transmission mechanism for increasing braking torque, including a main shaft, a motor assembly, a gear transmission device, and a braking mechanism. The motor assembly is located in the middle of the main shaft, with the gear transmission device and braking mechanism respectively located on both sides of the motor assembly. The motor assembly includes a stator winding and an outer rotor cylinder. The stator winding is located outside the main shaft, and the outer rotor cylinder is located outside the stator winding. The stator winding drives the outer rotor cylinder to rotate around the main shaft. The two ends of the outer rotor cylinder are respectively encapsulated with a drive end cover and a locking end cover. The drive end cover is connected to the gear transmission device. The outer side of the gear transmission device is connected to the hub housing. The outer rotor cylinder drives the hub housing to rotate around the main shaft through the gear transmission device. Sealing end covers are located on both sides of the hub housing, and the main shaft is rotatably and sealingly connected to the sealing end covers. The locking end cover is opposite to the braking mechanism, and the braking mechanism can perform axial extension and retraction relative to the locking end cover. This hub motor can increase driving torque and also has a vehicle locking function.
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