Independent Suspension Frame Reinforcement for Commercial Vehicle Rigidity
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Solution Overview
Problem
The reinforcement of panel structures in two-story electric buses compromises the strength and rigidity of the vehicle body, which is a challenge in maintaining the structural integrity and ride comfort provided by independent suspension systems.
Innovation Solution
A frame structure for commercial vehicles incorporating reinforced closed cross-section members, including front and rear outriggers, center, side, lower, front, rear, and upper reinforce units, connected through suspension mounting assemblies, to distribute load effectively and enhance strength and rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If panel structure is applied to reinforce the frame, then ease of manufacture is improved, but strength and rigidity of the vehicle body deteriorate
Solution Approach 1:
The patent employs composite reinforcement by combining panel structures with additional reinforce units (front, rear, side, and lower reinforce units) made of structural materials. This composite approach maintains manufacturing ease while compensating for the insufficient strength and rigidity of panel structures alone through multi-layer reinforcement.
Solution Approach 2:
The reinforcement system is segmented into multiple independent reinforce units (front reinforce unit, rear reinforce unit, side reinforce unit, lower reinforce unit) positioned at different locations. This segmentation allows each unit to address specific structural weaknesses locally while maintaining overall ease of manufacture through modular installation.
2Reliability
If independent suspension system is applied, then ride comfort and stability are improved, but structural complexity increases
Solution Approach 1:
The patent merges the suspension system with the frame reinforcement structure by integrating suspension mounting assemblies directly into the reinforced frame units. This combination reduces overall structural complexity by eliminating separate mounting structures while maintaining the reliability benefits of independent suspension.
3Strength
If multiple reinforce units are added to the frame, then strength and rigidity are improved, but device complexity increases
Solution Approach 1:
Each reinforce unit (front, rear, side, lower) is strategically positioned at specific locations where strength and rigidity are most needed. This local quality approach ensures that reinforcement is applied precisely where required rather than uniformly throughout the frame, optimizing the strength-to-complexity ratio.
Data Source
AI summary
A frame structure of a commercial vehicle having an independent suspension system may include: a front outrigger mounted at lower front ends of wheel housings along a wide direction of a vehicle; a rear outrigger mounted at lower rear ends of the wheel housings along the width direction, wherein the wheel housings are arranged between the front and rear outriggers in a vehicle body length direction; a center reinforce unit mounted on an inner lower side of the wheel housing and disposed between the wheel housings, the center reinforce unit configured to connect the front and rear outriggers along the vehicle body length direction; a side reinforce unit mounted on an inner side of the wheel housing and connected to the center reinforce unit; and a lower reinforce unit configured to be connected to the center reinforce unit and coupled to the first suspension mounting assembly through the rear outrigger.