Tow Hook Assembly With Mounting Bracket for Off-Road Towing Loads
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Solution Overview
Problem
The existing tow hook assemblies on vehicle bumper beams face challenges in securing mounting rigidity and towing strength, particularly in satisfying enhanced off-road towing load conditions due to excessive distance between the bumper skin and the tow hook.
Innovation Solution
A tow hook assembly is designed with a strengthening member connected to the bumper beam, and a tow hook mounted along the front-to-back direction of the vehicle body. This assembly includes a mounting bracket that connects to both the bumper beam and the stay, providing enhanced rigidity and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tow hook is protruded forward to avoid interference with the towing rope and bull bar, then the clearance for towing operation is improved, but the mounting rigidity and towing strength deteriorate due to excessive distance from the bumper skin
Solution Approach 1:
A mounting bracket is introduced as an intermediary component between the bumper beam and the tow hook. The bracket includes a bracket body connected to the bumper beam and a bracket extension protruding forward to support the tow hook, thereby maintaining structural strength while providing sufficient clearance for towing operations.
Solution Approach 2:
The mounting bracket extends in the front-to-back direction (longitudinal dimension) rather than only in the width direction. This dimensional extension allows the tow hook to be positioned forward with adequate clearance while maintaining a compact lateral profile that preserves mounting rigidity.
2Strength
If the distance between the bumper skin and the tow hook is reduced to improve mounting rigidity, then the mounting strength is improved, but the interference with the towing rope and bull bar worsens
Solution Approach 1:
The mounting bracket serves as a mediator that decouples the structural mounting function from the positioning function. The bracket body maintains close proximity to the bumper beam for structural integrity, while the bracket extension provides the necessary forward protrusion for towing clearance.
3Strength
If a lugged type tow hook is used to satisfy off-road towing load conditions, then the towing strength is improved, but the complexity of the assembly worsens due to additional components like bull bar
Solution Approach 1:
The mounting bracket is designed as a multi-functional component that simultaneously provides structural support, positioning, and reinforcement. It integrates the functions of a mounting structure and a strengthening member, eliminating the need for separate bull bar components while satisfying off-road towing load conditions.
Data Source
AI summary
A tow hook assembly mounted on a bumper beam disposed in the vehicle width direction. In particular, the tow hook assembly includes a strengthening member connected to the bumper beam, and a tow hook connected to the strengthening member along the front-to-back direction of the vehicle body.