Uniform Hinge Assembly for Articulating Door Stress Distribution
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Solution Overview
Problem
Existing roller hinge designs for multi-panel articulating garage doors face increased stress and higher costs due to oversized or multiple hinges at lateral edges, leading to installation challenges and potential structural disadvantages if not properly aligned.
Innovation Solution
A roller hinge assembly using multiple uniformly sized hinges joined by a single pin and tubular bushing for uniform alignment and stress distribution, allowing for a single standard hinge assembly with lower manufacturing and installation costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If oversized or multiple hinges are positioned at the lateral edges of door panels, then the stress resistance and structural integrity are improved, but the manufacturing cost and installation complexity increase
Solution Approach 1:
The hinge assembly is segmented into multiple uniformly sized hinge units (e.g., two hinge leaves) that are distributed along the lateral edge of the door panel. Each hinge unit is identical and can be independently manufactured, then assembled together to share the lateral edge load. This segmentation allows the system to achieve the required strength through distribution rather than relying on a single oversized hinge, thereby reducing individual component complexity and manufacturing cost.
Solution Approach 2:
Multiple hinge units are merged into a single functional assembly that collectively supports the roller and resists lateral edge stresses. The hinge units are positioned adjacent to each other and work together as an integrated system, sharing the load and providing enhanced structural integrity. This merging approach allows standard-sized hinges to achieve the performance of an oversized hinge while maintaining simpler individual component designs.
2Strength
If multiple hinges are positioned adjacent to lateral edges and engaged together, then the stress distribution is improved, but the installation difficulty and labor cost increase due to alignment requirements
Solution Approach 1:
The hinge units incorporate localized alignment features at specific positions along their edges. These features include protrusions, recesses, or keyed elements that engage with corresponding features on adjacent hinge units and the door panel. By concentrating the alignment function at these local points rather than requiring alignment across the entire hinge assembly, the installation process is simplified while maintaining proper stress distribution across all hinge units.
Solution Approach 2:
An intermediary component or feature is introduced between the multiple hinge units to facilitate their engagement and alignment. This intermediary element acts as a mediator that guides the hinge units into proper relative positions during installation, ensuring correct alignment without requiring complex adjustment procedures. The intermediary feature may be integrated into the door panel or the hinge units themselves, providing a reference that simplifies the assembly process.
3Ease of manufacture
If standard uniformly sized hinges are used instead of oversized hinges, then the manufacturing cost is reduced, but the stress resistance at lateral edges may be insufficient
Solution Approach 1:
Instead of using a single oversized hinge, the lateral edge support function is segmented across multiple standard-sized hinge units. Each unit carries a portion of the total load, and the cumulative strength of the assembled units equals or exceeds the strength of a single oversized hinge. This segmentation allows manufacturers to produce multiple identical, cost-effective standard hinges rather than expensive custom oversized hinges, while achieving the required structural performance through the combined capacity of the hinge assembly.
Data Source
AI summary
A roller hinge assembly for connecting articulating door panels and simultaneously supporting a laterally extending panel support roller assembly includes multiple uniformly sized hinges having a male hinge strap and a female strap. Two or more such uniformly sized hinge units are arrayed laterally or side by side co-joined by a single hinge pin. Further, to insure appropriate alignment, a tubular roller bushing co-joins the male or the female hinge straps.