Integrated Corner Module Layout for Low-Unsprung-Mass Steering
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Solution Overview
Problem
Existing in-wheel motor vehicles face challenges in integrating drive, braking, steering, and suspension systems, leading to issues with ride comfort and durability.
Innovation Solution
A corner module apparatus with a hub, main body, first and second motors, drive and steering members, and suspension components, including a strut and stabilizer bar, is designed to improve ride comfort and durability by reducing unsprung mass and optimizing space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If in-wheel motor vehicles integrate drive, braking, steering, and suspension systems, then device functionality is improved, but device complexity increases
Solution Approach 1:
The patent combines drive, braking, steering, and suspension systems into a single integrated corner module apparatus. The in-wheel motor (first motor) is mounted directly on the wheel hub, while the steering motor (second motor) and transmission mechanisms are integrated within the same assembly, creating a unified multi-functional unit that reduces the number of separate components and simplifies overall vehicle architecture.
Solution Approach 2:
The corner module apparatus is designed as a universal assembly that performs multiple functions simultaneously. The first motor provides both driving force and braking capability through regenerative braking, while the second motor handles steering. The suspension system is integrated through the same structural framework, making the corner module a multi-functional unit that replaces multiple separate systems.
2Weight of moving object
If the main body and first steering body are supported by the second steering body fixed to the vehicle body, then the size of unsprung mass is reduced, but device complexity increases
Solution Approach 1:
The support structure is segmented into multiple functional bodies: the main body housing the drive motor, the first steering body for steering transmission, and the second steering body fixed to the vehicle body. This segmentation allows the heavy components to be strategically positioned on the sprung mass (vehicle body) rather than unsprung mass (wheel assembly), reducing unsprung weight while maintaining structural integrity through defined connection points.
Data Source
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AI summary
A corner module apparatus includes a hub connected to a wheel, a main body spaced apart from the hub, a first motor arranged inside the main body, a second motor arranged inside the main body and spaced apart from the first motor, a drive member configured to be connected to the first motor and the hub and provide driving force to the wheel, and a steering member configured to be connected to the second motor and the hub and adjust a steering angle of the wheel.