Segmented Wind Deflector with Form-Fit Fastening for Wiper Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing motor vehicle window wiper devices lack stability and resilience, particularly in wind deflector units, which can lead to instability and inefficiency in wind resistance and contact forces.
Innovation Solution
Incorporating a holding unit with a longitudinal guide channel and a wind deflector unit produced via coextrusion, featuring partial wind deflector elements of different hardness, and a form-fitting fastening mechanism to enhance stability and torsion resistance, while avoiding air turbulence through specific angle configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional wind deflector unit is used, then the wiper device can be manufactured simply, but the stability and resilience are insufficient
Solution Approach 1:
The wind deflector unit is divided into multiple wind deflector sub-elements (first and second sub-elements) that can be independently designed and assembled. This segmentation allows each sub-element to be optimized for specific functions while maintaining overall structural stability without excessive complexity.
Solution Approach 2:
The patent employs different material hardness levels for different wind deflector sub-elements. The first wind deflector sub-element has a first hardness value while the second has a second hardness value, creating a composite structure that optimizes both stability and resilience through material differentiation.
2Strength
If a single hardness material is used for the wind deflector unit, then the manufacturing process is simple, but the strength and weight efficiency are reduced
Solution Approach 1:
Different regions of the wind deflector unit are assigned different material properties (hardness values). The first wind deflector sub-element uses a material with a first hardness value optimized for strength, while the second sub-element uses a material with a second hardness value optimized for weight efficiency, allowing each region to have the quality needed for its specific function.
3Object-affected harmful factors
If the fastening means are positioned at acute angles, then assembly is simple, but air turbulence occurs in the transition area
Solution Approach 1:
The fastening means are designed with specific angular configurations (obtuse angles rather than acute angles) to create smoother transitions and reduce air turbulence in the transition area between the holding unit and wind deflector unit, optimizing aerodynamic performance while maintaining assembly feasibility.
4Stability of the object's composition
If the wind deflector unit lacks torsion resistance, then the structure is lightweight, but the operational stability is reduced
Solution Approach 1:
The wind deflector unit is segmented into multiple sub-elements with different hardness values, allowing the structure to achieve torsion resistance through strategic material placement rather than uniform reinforcement, thereby maintaining lightweight construction while improving operational stability.
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 solution results in a more stable, resilient, and cost-effective wiper device with reduced weight and increased strength, effectively managing wind turbulence and contact forces, thereby improving operational performance.
Implementation Method 1
a spring element (16a, 16b, 16c, 16d, 16e) which is elastically changeable, and which in particular generates a counterforce which is dependent on a change in extension and is preferably proportional to the change and which counteracts the change
Implementation Method 2
the wind deflector unit be produced in a coextrusion process, as a result of which the wind deflector unit can be produced particularly cost-effectively and the wind deflector unit can be made very strong
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a wiping device, in particular a wiping device for a motor vehicle pane, comprising a retaining unit (10a - 10e) that has a retaining element (12a - 12e) with a longitudinal guide channel (14a - 14e) for guiding a spring element (16a -16e), and comprising a spoiler unit (22a - 22e). According to the invention, the retaining element (12a -12e) has at least one fixing means (18a -18e, 20a - 20e), the free end (24a - 24e, 26a - 26e) of which faces the longitudinal guide channel (14a -14e) and which is provided to interlock with the spoiler unit (22a - 22e).