Breakaway Front Subframe Recovery Hook for Rearward Collisions
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Solution Overview
Problem
Existing recovery hooks do not effectively prevent damage during rearward collisions, as they remain attached to the vehicle and can cause harm to other vehicles, and they lack a mechanism to break away under significant rearward forces.
Innovation Solution
A recovery hook assembly with a ring portion and base portion, secured by vertically and horizontally oriented fasteners, which allows the hook to break away from the vehicle under excessive rearward forces, preventing damage in collisions by disconnecting from the vehicle's frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the recovery hook is securely attached to the vehicle, then towing reliability is improved, but damage risk during rearward collisions increases
Solution Approach 1:
The recovery hook incorporates a breakaway mechanism that transitions the attachment from a static secure connection to a dynamic conditional connection. The hook remains firmly attached during normal towing operations but automatically detaches when subjected to rearward collision forces exceeding a predetermined threshold, thus resolving the contradiction between maintaining secure attachment and preventing collision damage.
Solution Approach 2:
The recovery hook assembly is divided into separable components: the hook body and the mounting bracket connected by a breakaway mechanism. This segmentation allows the hook to function as a unified secure attachment during towing, while enabling controlled separation during collisions, thereby addressing both reliability and harm prevention requirements.
2Strength
If the recovery hook remains attached during collisions, then vehicle structural integrity is maintained, but harm to other vehicles increases
Solution Approach 1:
The breakaway mechanism extracts the harmful function from the recovery hook system by enabling controlled detachment. When collision forces are detected, the mechanism allows the hook to separate from the vehicle frame, removing the source of harm to other vehicles while preserving the main vehicle structure.
3Object-affected harmful factors
If a breakaway mechanism is added, then collision damage is prevented, but device complexity increases
Solution Approach 1:
The breakaway mechanism is designed as a sacrificial component that is simpler and less expensive than the vehicle frame and other critical structures. The mechanism is intended to fail in a controlled manner during severe collisions, providing an affordable solution to prevent damage to more valuable vehicle components and other vehicles.
Solution Approach 2:
The breakaway mechanism utilizes material property changes or geometric configuration changes under extreme force conditions. The component is designed with specific strength and geometry parameters that cause it to detach at predetermined force thresholds, providing automatic collision protection without requiring complex sensors or control systems.
Data Source
AI summary
A recovery hook assembly including a recovery hook fastened to a vehicle frame by a vertically oriented fastener and a horizontally oriented fastener, which connect the recovery hook to the vehicle at three connection points. When the recovery hook is pulled in the forward direction, the recovery hook remains connected to the vehicle to allow the vehicle to be towed. When the recovery hook is pushed in a rearward direction, the recovery hook moves rearward and can break away from the vehicle, thus inhibiting damage being caused by the recovery hook.