Asymmetric Hub Bracket for Toe-In Stability
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Solution Overview
Problem
Conventional hub bracket structures face complexity in achieving toe-in characteristics and stability due to the need for bushings with different rigidity, and often result in toe-out characteristics and potential tilting issues under lateral forces.
Innovation Solution
A hub bracket structure with a mounting surface extending in both up-down and front-rear directions, featuring a front connecting surface and a rear connecting surface formed as plate shapes, where the angle between the mounting surface and the front connecting surface is greater than the angle between the mounting surface and the rear connecting surface, providing differential rigidity to control wheel alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bushings with different rigidity in front and rear are placed at appropriate positions to achieve toe-in characteristics, then straight-drivability and braking stability are improved, but the structure becomes complicated
Solution Approach 1:
The hub bracket employs local quality differentiation through asymmetric angle design: the front connecting surface has a larger angle with the mounting surface than the rear connecting surface. This creates differential rigidity distribution within the single bracket structure, achieving toe-in characteristics without requiring separate bushings of different rigidities, thus resolving the contradiction between reliability improvement and structural simplicity
Solution Approach 2:
The hub bracket adopts asymmetric geometry where the front connecting surface angle is deliberately made larger than the rear connecting surface angle. This asymmetric design inherently provides the differential rigidity needed for toe-in control, eliminating the need for complex symmetric arrangements of multiple bushings and achieving both improved reliability and reduced structural complexity
2Ease of manufacture
If the hub bracket shape is simplified and symmetrical from front to rear, then manufacturing is easier, but the joining point is behind the tire ground contact point resulting in toe-out characteristics
Solution Approach 1:
Rather than using symmetric simplification, the invention deliberately introduces asymmetry in the connecting surface angles. The front connecting surface has a larger angle than the rear, which shifts the effective joining point forward to achieve toe-in characteristics. This asymmetric design maintains manufacturing feasibility while correcting the alignment defect of symmetric designs
Solution Approach 2:
The invention changes the geometric parameters of the connecting surfaces by setting different angles for front and rear surfaces. This parameter modification alters the mechanical behavior of the hub bracket under lateral forces, transforming the toe-out characteristic of symmetric designs into toe-in characteristics while keeping the overall structure simple and manufacturable
3Device complexity
If the connector is formed as a horizontal plate, then the structure is simple, but the hub bracket tends to tilt in the up-down direction against lateral force
Solution Approach 1:
The connecting surfaces are designed to extend in multiple dimensions (up-down and vehicle width directions) rather than being simple horizontal plates. This dimensional expansion provides resistance against lateral forces while maintaining structural simplicity, preventing up-down tilting without requiring complex multi-component connectors
Data Source
AI summary
The present disclosure relates to a hub bracket structure wherein a hub bracket that connects a trailing arm and a hub includes a hub mounting surface, a front connecting surface that connects a front portion of the hub mounting surface and the trailing arm, and a rear connecting surface that connects a rear portion of the hub mounting surface and the trailing arm, each of the front connecting surface and the rear connecting surface is formed in a plate shape extending in up-down and vehicle width directions, and an angle formed by the hub mounting surface and the front connecting surface is greater than an angle formed by the hub mounting surface and the rear connecting surface.