Axial Hub Motor Segmentation for Serviceability
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Solution Overview
Problem
Integrated hub motor and wheel assemblies are expensive, heavy, and difficult to service, requiring specialized facilities and technicians for maintenance, as they cannot be removed or replaced without detaching the entire wheel assembly.
Innovation Solution
A modular hub motor system that allows for attachment and detachment from the wheel without removing it from the vehicle, featuring a cylindrical rotor and stator that can be coupled to the axle and wheel surface via accessible mechanical mechanisms, enabling user-friendly servicing and reconfiguration of the vehicle's drivetrain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the hub motor is integrated with the wheel assembly, then the structural stability and strength are improved, but the ease of repair and serviceability deteriorate
Solution Approach 1:
The hub motor assembly is divided into separable components: the wheel assembly and the hub motor assembly. The hub motor assembly can be detached from the wheel assembly without removing the wheel from the vehicle, enabling independent servicing of the motor components while maintaining the structural integrity of both parts when connected.
2Device complexity
If the hub motor is integrated with the wheel assembly, then the device complexity is reduced, but the ease of operation for maintenance deteriorates
Solution Approach 1:
The system is segmented into a wheel assembly and a separately attachable hub motor assembly. This segmentation allows the hub motor to be detached and serviced independently while maintaining a simple integrated structure during normal operation, thereby improving maintenance accessibility without increasing overall device complexity.
Solution Approach 2:
The hub motor assembly is extracted as a separate, removable unit from the wheel assembly. The stator is attached to the outer wheel surface and the rotor to the axle, but both can be detached without removing the wheel from the vehicle, providing easy access for maintenance while keeping the operational structure simple.
3Ease of operation
If the hub motor components are located toward the outside of the wheel, then the ease of operation for servicing is improved, but the device complexity increases
Solution Approach 1:
The hub motor components are positioned in the axial dimension rather than radially within the wheel. The rotor is attached to the axle and the stator to the outer wheel surface, creating an axial hub motor configuration that provides easy access to components from the outside of the wheel without requiring complex internal arrangements.
Data Source
AI summary
Systems, methods, and other implementations described herein relate to a hub motor for a wheel of a vehicle. In one embodiment, the hub motor includes a cylindrical rotor and a cylindrical stator coaxially spaced from the cylindrical rotor along an axle. The cylindrical rotor includes a rotor attachment to selectively couple the cylindrical rotor to the axle. The cylindrical stator is disposed between the cylindrical rotor and the wheel and includes stator attachments to selectively couple the cylindrical stator to an outer wheel surface of the wheel. The cylindrical rotor and the cylindrical stator are selectively attachable to the axle and the outer wheel surface, respectively, without removing the wheel from the vehicle.