Vehicle Fairing Guiding Projections for Assembly Alignment
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Solution Overview
Problem
Existing vehicle fairing and covering devices face challenges during installation due to reinforcing edges that obstruct horizontal translation, leading to incorrect assembly and potential mechanical weakness, especially when made of thin plastic.
Innovation Solution
Incorporating coding and/or guiding projections that assist in parallel translation movement and space fixing interfaces during assembly, preventing incorrect alignment and providing a clear path for installation by acting as keying and guiding elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a reinforcing edge (rim) is added around the manhole opening to strengthen the fairing, then the mechanical strength is improved, but the installation difficulty increases due to obstruction of horizontal translation movement
Solution Approach 1:
The reinforcing edge is segmented into two functional parts: a fixed reinforcing rim that provides mechanical strength, and a movable guiding projection that facilitates installation. The guiding projection is positioned to engage with corresponding features on the vehicle body during horizontal translation, guiding the fairing into correct position without the entire rim obstructing movement.
Solution Approach 2:
The guiding projection acts as an intermediary element between the reinforcing edge and the installation process. It provides a controlled interaction point that allows the fairing to be guided into position during horizontal translation, while the main reinforcing rim remains stationary to provide structural support.
2Weight of moving object
If the fairing is made thin and lightweight to reduce fuel consumption, then the weight is reduced, but the mechanical strength decreases creating areas of weakness around openings
Solution Approach 1:
The fairing structure employs local quality by concentrating reinforcement only at critical areas (around manhole openings and fixing interfaces) while maintaining thin walls in non-critical areas. The reinforcing edge is strategically positioned to provide local strength enhancement without adding global weight, allowing the fairing to remain lightweight overall while having targeted strength where needed.
3Strength
If the reinforcing edge projects perpendicular to the opening plane to provide strength, then the mechanical strength is improved, but it creates obstruction during horizontal translation installation
Solution Approach 1:
The reinforcing edge structure is made asymmetric in its functional behavior: it provides full perpendicular reinforcement for strength where needed, but the guiding projection portion is oriented and dimensioned to engage horizontally during installation. This asymmetric design allows the same structure to serve both strengthening and guiding functions without conflict.
Data Source
Figure 1~2a
Figure 2b~3
Figure 4a~4b
AI summary
Disclosed is a covering device (10) for a vehicle (20), comprising a first fastening interface (11) intended to be pressed, during a fitting of the covering device to the vehicle, against a second fastening interface (21) that is rigidly attached to the vehicle (20), characterised in that it further comprises at least one fool-proofing and/or guidance projection (15) configured: - to assist the fitting, according to a translational movement (H) of the covering device (10) parallel to a fitting plane (P) of the fastening interfaces (11, 21), and - in order to space the first and second fastening interfaces (11, 21) apart from each other during a fitting phase of the covering device (10) to the vehicle (20).