Wiper Blade Adapter Aerodynamics for High-Speed Pressing Force
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Solution Overview
Problem
Existing wiper devices require high pressing force to maintain adequate wiping power, which can lead to unfavorable aerodynamics during high-speed travel, counteracting the required pressing force and potentially worsening wiping performance or making it impossible.
Innovation Solution
An adapter unit with a wind deflector face featuring distinct first and second part-faces, differing in orientation and geometry, which utilizes aerodynamic effects to increase the pressing force on the wiper blade against the vehicle window, reducing the necessary pressing force required from the wiper arm and improving wiping power by creating a resultant force that presses the wiper blade onto the window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the wiper arm applies high pressing force to ensure adequate wiping power, then the wiping performance is improved, but the aerodynamic stability deteriorates during high-speed travel
Solution Approach 1:
The patent converts the harmful aerodynamic forces that occur during high-speed travel into a beneficial effect. The wind deflector face is specifically designed to redirect airflow in a way that generates aerodynamic pressure, which then acts to press the wiper blade against the vehicle window. This transforms what would normally be a destabilizing force into a useful pressing force that enhances wiping performance without requiring additional mechanical pressing force from the wiper arm.
2Force
If the wiper arm uses a larger spring to apply sufficient pressing force, then the wiping power is improved, but the device complexity and size increase
Solution Approach 1:
The wind deflector face enables the wiper blade to press itself against the vehicle window by utilizing aerodynamic forces generated during vehicle travel. The airflow redirection creates pressure differential that automatically applies the necessary pressing force, eliminating the need for a large spring or complex pressing mechanism in the wiper arm. The system essentially serves itself by converting environmental forces into the required operational force.
3Ease of manufacture
If the wind deflector face uses a single uniform geometry, then the manufacturing is simplified, but the pressing force control and orientation are insufficient
Solution Approach 1:
The wind deflector face is divided into multiple geometric segments or zones with different orientations and angles. This segmentation allows each portion to redirect airflow in specific directions, creating controlled pressure distribution across the wiper blade. The divided geometry enables precise control over the magnitude and direction of aerodynamic pressing forces while remaining manufacturable using standard molding or fabrication techniques.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The adapter unit enhances wiping power by increasing the total pressing force on the wiper blade, allowing for a more compact and reliable wiper arm design with reduced spring force, while preventing counteracting forces that could impair wiping performance during high-speed travel.
Implementation Method 1
as a result of aerodynamic effects, in particular a wind, in particular travel wind, a resultant force presses the wiper blade onto the vehicle window
Data Source
AI summary
The invention relates to an adapter unit which is provided for coupling, in particular releasably coupling, a wiper blade to a wiper arm, having a wind deflecting surface which is designed to deflect inflowing air and press the wiper blade against a vehicle windshield. According to the invention, the wind deflecting surface has at least one first sub-surface and a second sub-surface, wherein the first sub-surface has a different orientation than the second sub-surface and/or the first sub-surface has a different geometry than the second sub-surface.