Wiper Adapter Wind Deflector Aerodynamic Pressing Force
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Solution Overview
Problem
Wiper devices require high contact pressure to ensure adequate wiping performance, which can lead to increased complexity and cost in the wiper arm design, and may result in unfavorable aerodynamic forces at high speeds that deteriorate wiping performance or make it impossible.
Innovation Solution
An adapter unit with a wind deflector surface and pivot bearing that uses varying support element heights and orientations to leverage airflow for increased pressing force on the wiper blade, reducing the need for high contact pressure and improving aerodynamics by ensuring a resultant force presses the wiper blade onto the window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high contact pressure is applied by the wiper arm to press the wiper blade against the vehicle window, then adequate wiping performance is ensured, but the wiper arm design becomes more complex and costly
Solution Approach 1:
The patent converts the harmful aerodynamic force (wind pressure) into a beneficial pressing force. The wind deflector surface is designed to redirect airflow so that the aerodynamic pressure normally acting against the wiper assembly is transformed into an additional force pressing the wiper blade against the window, thereby reducing the mechanical contact pressure required from the wiper arm while maintaining wiping performance
Solution Approach 2:
The wind deflector surface acts as an intermediary element between the airflow and the wiper blade. It mediates the interaction by redirecting the aerodynamic forces through its specific geometry and orientation, converting the wind pressure into a useful pressing force on the wiper blade without requiring complex modifications to the wiper arm mechanism
2Reliability
If high contact pressure is applied by the wiper arm, then adequate wiping performance is ensured, but adverse aerodynamic forces are generated at high speeds that deteriorate wiping performance
Solution Approach 1:
The wind deflector surface converts the harmful aerodynamic forces into a beneficial pressing force. By optimizing the surface geometry and orientation, the patent redirects airflow so that wind pressure acts to press the wiper blade against the window rather than creating adverse lifting or destabilizing forces, thereby improving wiping performance even at high speeds
Solution Approach 2:
The patent changes the aerodynamic parameters by modifying the wind deflector surface geometry and orientation. The specific angular orientation and curved surface profile alter the airflow characteristics, transforming the aerodynamic force vector from a harmful direction into a beneficial pressing direction that enhances contact between the wiper blade and window
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
This design enhances wiping performance by reducing the required contact pressure, allows for a simpler and more compact wiper arm, and prevents adverse aerodynamic forces, ensuring effective operation even at high speeds.
Implementation Method 1
a wind deflector surface which is set up to deflect incoming air and to press the wiper blade against a vehicle window
Implementation Method 2
when driving fast it presses the wiper blade against the vehicle window due to the airstream flowing against it
Implementation Method 3
a pivot bearing, which is set up to pivotally mount the wiper arm relative to the wiper blade
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The invention relates to an adapter unit which is provided for coupling, in particular releasably coupling, of a wiper blade to a wiper arm, comprising a wind deflector surface, which is designed to deflect inflowing air and press the wiper blade against a vehicle windshield, and comprising a pivot bearing, which is designed to support the wiper arm so as to be pivotal with respect to the wiper blade, wherein the pivot bearing has at least two columns arranged largely vertically on an adapter base surface, wherein each of the columns has a hinge pin which is oriented parallel or largely parallel to a bearing axis and is designed to support the wiper arm and/or a wiper arm adapter unit, and wherein the adapter unit comprises at least two supporting elements arranged on the adapter base, which supporting elements are designed to support or mechanically contact the wind deflector surface, wherein the pivot bearing is arranged at least largely between the at least two supporting elements and at least one first supporting element of the at least two supporting elements is designed as a captive fastener for the adapter unit on the wiper arm, in particular if a fixing means is faulty. According to the invention, a supporting element of the at least two supporting elements which faces away from the wiper arm has a lower height than a supporting element of the at least two supporting elements which faces the wiper arm, in particular that the height of each of the at least two supporting elements corresponds to a height profile of the window deflector surface. (Figure 2)