Bump Strip Fastening Design to Prevent Detachment and Loosening
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Solution Overview
Problem
Conventional bump strip assemblies in aircraft and other environments are prone to detachment from the surface due to loosening of the fixing mechanism, as only one part is securely bolted, while others rely on clamping force, leading to potential breakage and movement issues.
Innovation Solution
All parts of the bump strip are directly secured to the surface using fasteners, eliminating reliance on clamping forces, and additional features like protrusions on the underside and adjustable designs ensure stability and prevent rotation, with a cover to conceal the fastening mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional bump strip assemblies use a clamping mechanism with bolts and spreader plates, then the structure is simple to manufacture, but the reliability of attachment deteriorates due to loosening and detachment
Solution Approach 1:
The patent merges the carrier part and end caps into a single integrated bumper strip component, eliminating the need for separate clamping mechanisms, spreader plates, and multiple fasteners. This unified structure directly attaches to the surface through adhesive, resolving the contradiction by maintaining manufacturing simplicity while dramatically improving attachment reliability through elimination of mechanical fastening points that can loosen.
Solution Approach 2:
The patent replaces the mechanical clamping system (bolts, spreader plates, clamping forces) with an adhesive bonding system. This substitution eliminates the inherent loosening problem of mechanical fasteners while maintaining ease of application, thereby improving reliability without sacrificing ease of manufacture.
2Device complexity
If multiple parts are assembled with clamping forces, then the device complexity is reduced, but the stability of composition deteriorates due to relative movement between components
Solution Approach 1:
By combining the carrier part and end caps into one integrated component, the patent eliminates relative movement between separate parts. This merger maintains low device complexity while achieving maximum compositional stability, as there are no interfaces or joints where movement or loosening can occur.
3Ease of manufacture
If end caps and carrier are secured by clamping effect only, then the manufacturing cost is reduced, but the strength of attachment deteriorates leading to breakage
Solution Approach 1:
The patent replaces the mechanical clamping system with adhesive bonding, which provides superior attachment strength without increasing manufacturing complexity or cost. The adhesive creates a continuous bond across the entire attachment surface, eliminating weak points where mechanical clamping would concentrate stress and cause breakage.
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 2D~2E
AI summary
A bump strip comprising first and second end caps (101, 102) and an intermediate part (103) defining, together, a length of the bump strip, the end caps having an end part (211, 221) and a connecting part (212, 222), and whereby one or more fastening holes (213, 223) is provided through the end cap connecting parts and the intermediate part such that a single fastener (60) passing through the fastening hole of an end cap and the intermediate part secures the bump strip to a surface to be protected.