Vehicle Hinge Pillar Reinforcement Bead Design
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Solution Overview
Problem
Hinge pillars in vehicles face challenges in resisting deformation during side and front collisions without increasing thickness, which would lead to higher weight and costs.
Innovation Solution
A side body structure with a hinge pillar reinforced by a closed cross-section design featuring a reinforcement with a first bead portion extending up-down between gussets and a second bead portion at the boundary between the side and front surfaces, both formed during the press forming process to enhance strength without thickness increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the reinforcement thickness is increased to improve resistance to deformation, then the strength is improved, but the weight and costs increase
Solution Approach 1:
The patent applies local quality by forming bead portions at specific locations on the reinforcement rather than uniformly increasing thickness throughout. The first bead portion is formed on the side surface and the second bead portion is formed at the edge portion, creating localized thickness variations that provide enhanced strength exactly where collision forces are most likely to affect the hinge pillar, while keeping other areas thinner to reduce overall weight.
Solution Approach 2:
The patent transitions from a single-dimensional thickness increase to a multi-dimensional structural solution by adding bead portions that create complex three-dimensional geometry. The bead portions form raised or recessed features that add structural rigidity through geometric complexity rather than simply increasing material volume, allowing the reinforcement to resist deformation in multiple directions while maintaining lower overall weight.
2Strength
If the reinforcement thickness is increased to improve resistance to deformation, then the strength is improved, but the costs increase
Solution Approach 1:
The patent applies local quality by forming bead portions at specific locations on the reinforcement rather than uniformly increasing thickness throughout. The first bead portion is formed on the side surface and the second bead portion is formed at the edge portion, creating localized thickness variations that provide enhanced strength exactly where collision forces are most likely to affect the hinge pillar, while keeping other areas thinner to reduce overall weight.
Solution Approach 2:
The patent applies parameter changes by modifying the geometric parameters of the reinforcement through bead formation. The bead portions change local thickness, curvature, and cross-sectional area parameters, transforming a simple flat or curved panel into a structurally optimized component with varied parameters that maximize strength-to-weight ratio and reduce manufacturing costs compared to uniform thickening.
3Ease of manufacture
If the reinforcement geometry is simplified, then the manufacturing is easier, but the strength is reduced
Solution Approach 1:
The patent applies preliminary action by pre-forming the bead portions into the reinforcement during the stamping or forming process, before assembly into the hinge pillar. The first bead portion on the side surface and the second bead portion at the edge portion are created as integral features of the reinforcement itself, eliminating the need for separate welding, bolting, or attaching operations, thus maintaining manufacturing simplicity while significantly enhancing edge strength.
Solution Approach 2:
The patent applies local quality by forming bead portions at specific locations on the reinforcement rather than uniformly increasing thickness throughout. The first bead portion is formed on the side surface and the second bead portion is formed at the edge portion, creating localized thickness variations that provide enhanced strength exactly where collision forces are most likely to affect the hinge pillar, while keeping other areas thinner to reduce overall weight.
Data Source
AI summary
A side body structure of a vehicle includes a hinge pillar reinforced by a reinforcement having a side surface and a front surface extending inward in the vehicle width direction from the front end of the side surface. The reinforcement is provided with upper and lower gussets for reinforcing a pair of upper and lower hinge mounting portions, respectively, for a side door. The reinforcement has a first bead portion on the side surface between the upper and lower gussets, and has a second bead portion at an edge portion that is a boundary portion between the side surface and the front surface. The second bead portion extends in an up-down direction and is recessed inward at the edge portion continuously from the side surface to the front surface.