Dual-Mount Tow Hook Structure for Off-Road Strength and Crash Performance
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Solution Overview
Problem
Current tow hook designs on North American pickup trucks do not meet the off-road strength and stiffness requirements while maintaining the crash performance and deformation mode of the front body structure.
Innovation Solution
A tow hook system comprising a bumper beam, a crush box, and a tow hook with a front tow hook end secured to the bumper beam and a rear tow hook end secured to the crush box, allowing for load sharing between the bumper beam and the crush box.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the tow hook is permanently mounted to the front body structure to maintain rugged appearance, then the aesthetic appeal and perceived capability are improved, but the off-road strength and stiffness requirements cannot be met
Solution Approach 1:
The tow hook mounting system is divided into two separate attachment points: one to the bumper beam and one to the crush box. This segmentation allows each mounting location to serve a specific function - the bumper beam provides aesthetic integration while the crush box provides structural strength for off-road conditions.
Solution Approach 2:
The invention adds a new dimension to the mounting structure by utilizing both the bumper beam (front dimension) and the crush box (rear dimension). This dual-dimensional approach allows the tow hook to be permanently mounted for aesthetic purposes while deriving actual strength from the crush box structure.
2Strength
If the tow hook is mounted to meet off-road strength requirements, then the towing capability is improved, but the crash performance and deformation mode of the front body structure are affected
Solution Approach 1:
The crush box acts as an intermediary structure between the tow hook and the front body structure. It provides a strong attachment point for towing operations while being positioned and designed to not interfere with the crash deformation mode of the front body structure, thus mediating between strength requirements and crash performance.
Solution Approach 2:
The mounting system applies different attachment strategies at different locations: the front attachment to the bumper beam provides aesthetic integration, while the rear attachment to the crush box provides localized strength enhancement without affecting the overall crash performance of the front body structure.
3Device complexity
If a single mounting location is used for the tow hook, then the device complexity is reduced, but both off-road strength and crash performance requirements cannot be simultaneously met
Solution Approach 1:
The mounting system is segmented into two distinct attachment points with different functions. This segmentation, while adding some complexity, allows each component to be optimized for its specific role, ultimately creating a more efficient overall system that meets multiple requirements.
Solution Approach 2:
The dual-mounting system serves multiple functions: aesthetic integration through front mounting, structural strength through rear mounting, and crash performance preservation. This multi-functionality justifies the increased complexity by simultaneously addressing appearance, strength, and safety requirements.
Data Source
AI summary
A tow hook system is provided. The tow hook system may comprise a bumper beam, a crush box, and a tow hook. The tow hook may comprise a front tow hook end and a rear tow hook end. The front tow hook end may be secured to the bumper beam. The rear tow hook end may be secured to the crush box.