Underfloor Guard Geometry for Lateral Debris Deflection
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Solution Overview
Problem
Existing vehicle protectors fail to effectively disperse the impact of falling objects on road debris, potentially endangering mounted objects below the vehicle floor during collisions.
Innovation Solution
A guard member with oblique sides forming a triangular pyramid shape, where the angle between the oblique sides satisfies α > β, disperses the impact by directing falling objects laterally and downward, reducing the likelihood of the object penetrating beneath the vehicle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat plate shape protector is used, then the structure is simple and easy to manufacture, but the impact cannot be dispersed effectively when a vehicle runs on a falling object
Solution Approach 1:
The patent applies curvature by transitioning from a flat plate shape to an arched shape with a specific cross-sectional geometry. The arch shape includes a first oblique side and a second oblique side forming a curved surface that redirects impact forces. This curved geometry enables the protector to disperse impact from falling objects more effectively while maintaining manufacturing feasibility through standard arch-shaped profiles.
Solution Approach 2:
The patent introduces a third dimension by adding vertical arching to the previously two-dimensional flat plate. The arch shape creates a three-dimensional structure with specific angle relationships (α and β) between the oblique sides and the horizontal plane, enabling impact dispersion in multiple directions and improving protective capability against falling objects.
2Strength
If the protector has high rigidity, then it can protect mounted objects from impact, but it cannot effectively redirect falling objects laterally
Solution Approach 1:
The patent applies asymmetry by designing the arch shape with unequal oblique sides having different angles (α and β) relative to the horizontal plane. This asymmetric geometry enables differential redirection of impact forces, allowing the structure to both resist impact through its rigid arch form and redirect falling objects laterally through the specific angular relationships of its oblique sides.
Data Source
AI summary
The guard member is a guard member that protects the front of a payload located under the floor of the vehicle. The guard member has a first oblique side inclined so as to extend downward from the front side toward the rear side of the vehicle, and a second oblique side inclined so as to extend laterally from the front side toward the rear side of the vehicle. When an angle between a horizontal straight line along a front-rear direction of the vehicle and the first oblique side is an angle α, and an angle between the straight line and the second oblique side is an angle β, a relationship of the angle α>the angle β is satisfied.