Vehicle Door Guard Beam Hinge Attachment
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Solution Overview
Problem
Vehicle door assemblies face challenges in resisting deformation during impact events, as existing designs lack effective reinforcement to maintain structural integrity and stability.
Innovation Solution
A vehicle door assembly design that incorporates a guard beam attached to an inner door panel and a hinge, with specific fasteners and tolerances allowing for secure attachment and limited movement, providing enhanced structural reinforcement and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional door assembly designs are used, then the door structure remains simple and easy to manufacture, but the door cannot effectively resist deformation during impact events
Solution Approach 1:
The door assembly is segmented into distinct functional components: inner door panel, outer door panel, guard beam, reinforcement panel, and hinge assembly. This segmentation allows each component to be optimized independently for its specific function while contributing to overall impact resistance.
Solution Approach 2:
Reinforcement is applied locally at critical areas rather than uniformly across the entire door. The guard beam is positioned at the leading edge to absorb impact forces, the reinforcement panel is placed at the hinge attachment location to prevent deformation, and additional stiffeners are positioned strategically based on impact analysis.
2Reliability
If a guard beam is added to reinforce the door structure, then the structural integrity during impact improves, but the manufacturing complexity increases
Solution Approach 1:
The guard beam and reinforcement panel are designed with pre-positioned attachment features (openings, fastener locations) that align with corresponding features on the inner door panel and hinge assembly. This preliminary configuration of attachment points simplifies the assembly process by eliminating complex alignment procedures during manufacturing.
Solution Approach 2:
The guard beam serves multiple functions: it acts as a primary impact barrier, provides attachment points for the hinge assembly, and serves as a structural reinforcement element. This multi-functionality reduces the need for separate components, thereby simplifying the overall manufacturing process.
3Strength
If multiple fasteners are used to attach the guard beam and hinge, then the attachment strength and stability improve, but the assembly complexity increases
Solution Approach 1:
The attachment system merges multiple functions into integrated components. The guard beam includes built-in openings that serve as attachment points for both the inner door panel and the hinge assembly. The reinforcement panel is combined with the hinge attachment location, allowing simultaneous attachment of both elements through the same structural feature, thereby reducing assembly steps.
Data Source
AI summary
A vehicle door assembly include an inner door panel, a first hinge and a guard beam. The inner door panel has a first edge portion and a second edge portion. The first edge portion has a first hinge attachment location and a second hinge attachment location with the first hinge location having a first opening and a second opening. The first hinge is dimensioned and configured to attach to the first hinge attachment location of the inner door panel. The guard beam has a first end and a second end. The first end has a first fastener and a second fastener rigidly and non-movably attached thereto. The first fastener is inserted through the first opening and the second fastener extends through the second opening in the first hinge attachment location, the first and second fasteners further fastening to the first hinge thereby attaching the first hinge to the door panel.