Tonneau Cover Hinge Gutter and Seal Design
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Solution Overview
Problem
Foldable tonneau cover systems for pickup trucks face challenges in effectively sealing the cargo box to prevent fluid ingress, especially when in use or folded configurations, which can lead to aesthetic and functional issues.
Innovation Solution
The implementation of a hinge assembly with a base component and pivot members that form a primary seal and gutter system to inhibit fluid communication, along with a bow member and frame assembly that uses adhesive to secure panels and manage excess material, ensuring a secure and watertight closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If solid panels are used in foldable tonneau covers, then strength and rigidity are improved, but sealing effectiveness deteriorates due to fluid ingress at hinge assemblies
Solution Approach 1:
The hinge assembly is segmented into multiple functional components: a base component with a recess, a pivot member with a seal, and a gutter component. This segmentation allows each component to perform its specific function - the seal prevents fluid ingress at the pivot interface, the gutter collects and channels fluid away, and the base component provides structural support. The segmented design resolves the contradiction by enabling effective sealing without compromising the structural integrity provided by solid panels.
Solution Approach 2:
A seal (such as an O-ring or gasket) is introduced as an intermediary element between the base component and the pivot member. This seal acts as a mediator that prevents fluid communication between the cargo box interior and the hinge assembly, thereby maintaining sealing effectiveness while allowing the solid panel structure to retain its strength and rigidity.
2Adaptability or versatility
If hinge assemblies are added to connect panels, then foldability is improved, but fluid ingress increases due to additional sealing interfaces
Solution Approach 1:
A flexible seal (such as an O-ring or elastomeric gasket) is used at the pivot member to create a flexible barrier against fluid ingress. This flexible seal accommodates the rotational movement required for foldability while maintaining a continuous barrier that prevents fluid penetration, thus resolving the contradiction between foldability and fluid ingress prevention.
Solution Approach 2:
The fluid collection and discharge function is extracted from the hinge assembly's primary sealing function. A dedicated gutter component is provided that collects fluid passing the seal and discharges it outside the cargo box. This extraction allows the seal to focus on preventing fluid ingress while the gutter handles fluid management, thereby maintaining foldability without compromising sealing effectiveness.
3Reliability
If gutters are provided to collect fluid, then sealing effectiveness is improved, but device complexity increases
Solution Approach 1:
The gutter function is merged with the base component of the hinge assembly. The base component includes a recess that forms the gutter, and the seal is received within this same recess. This merging of functions into a single integrated component achieves effective fluid collection and discharge without significantly increasing device complexity, as the gutter is formed as part of the existing base structure rather than as a separate additional component.
Data Source
AI summary
A tonneau system for a cargo box of a pickup truck having panels and hinge assemblies pivotally coupling the panels is provided. The hinge assemblies can define gutters to collect fluid and guide the fluid away from the cargo box. The hinge assemblies can include covers between pivoting components which can be configured to reduce friction during pivoting. The panels and hinge assemblies can include features to receive excess adhesive material during assembly.