Wiper Strip Damping Structure for Low-Noise Lip Folding
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Solution Overview
Problem
Existing wiper strip units face challenges in efficiently damping the folding of wiper lips during the wiping process, leading to potential high-energy impacts and noise, while also requiring robustness against loads and ensuring low-noise operation.
Innovation Solution
The wiper strip unit incorporates a damping element with a convex stop surface and extensions that reduce the distance between the wiper base body and the damping element, allowing for progressive blocking and rolling damping, along with connecting webs for increased flexibility, to distribute energy and prevent premature stops, ensuring low-energy impacts and noiseless operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a damping element is used to dampen the folding of the wiper lip, then noise is reduced, but the impact energy increases
Solution Approach 1:
The stop surface is divided into multiple convex regions arranged in sequence along the wiping direction. These segmented convex regions create multiple smaller stopping points instead of a single large impact, distributing the energy dissipation across multiple smaller events while maintaining noise reduction through progressive blocking.
Solution Approach 2:
The damping element is designed with increased flexibility through connecting webs, allowing it to dynamically adapt during the wiping process. This flexibility enables the damping element to progressively engage with the convex stop regions, creating a rolling damping effect that reduces impact energy while maintaining noise reduction.
2Adaptability or versatility
If the distance between the damping element and wiper base body is increased, then flexibility is improved, but the robustness against loads decreases
Solution Approach 1:
The structure implements different local qualities: the connecting webs provide flexibility in specific areas where movement is needed, while the convex stop regions and extensions provide rigidity and load-bearing capacity where structural strength is required. This localized differentiation resolves the contradiction between flexibility and robustness.
Solution Approach 2:
The wiper strip unit combines different material properties and structural characteristics - the elastic damping element with the rigid wiper base body featuring convex stop regions. This composite structure allows the system to exhibit both flexible damping behavior and robust load-bearing capacity simultaneously.
3Use of energy by moving object
If a convex stop surface is used, then energy distribution is improved, but the device complexity increases
Solution Approach 1:
The convex stop regions are integrated directly into the wiper base body structure rather than being separate components. This merging of functions allows the stop surface to perform both as a structural element of the base body and as an energy-distributing damping surface, reducing overall device complexity while maintaining energy distribution benefits.
Solution Approach 2:
The extensions of the wiper base body serve multiple functions: they provide structural support, create the convex stop regions for energy distribution, and contribute to the overall rigidity of the assembly. This multi-functionality reduces the need for additional components, thereby reducing complexity while achieving good energy distribution.
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 achieves low-energy impacts, reduces noise, and enhances the robustness of the wiper strip unit by distributing energy through the convex stop surface and extensions, allowing for efficient and material-friendly wiping with low-noise movements.
Implementation Method 1
a damping element, which is arranged between the at least one wiper lip and the at least one wiper base body, and which is intended to dampen the folding of the at least one wiping lip during a wiping process
Implementation Method 2
allowing for progressive blocking and rolling damping
Implementation Method 3
distribute energy through the convex stop surface and extensions, allowing for efficient and material-friendly wiping with low-noise movements
Data Source
Figure 1
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AI summary
The invention relates to a wiper strip unit having at least one wiper lip (14a; 14b; 14c; 14d), at least one wiper main body (12a; 12b; 12c; 12d) and at least one damping element (16a; 16b; 16c; 16d) which is arranged between the at least one wiper lip (14a; 14b; 14c; 14d) and the at least one wiper main body (12a; 12b; 12c; 12d) and which is provided to damp the turning down of the at least one wiper lip (14a; 14b; 14c; 14d) during a wiping process, wherein a distance (22a; 22b; 22c; 22d) between the at least one damping element (16a; 16b; 16c; 16d) and the at least one wiper main body (12a; 12b; 12c; 12d) increases toward a free end (18a, 18a'; 18b, 18b'; 18c, 18c'; 18d, 18d') of the at least one damping element (16a; 16b; 16c; 16d), and wherein the at least one wiper main body (12a; 12b; 12c; 12d) has, on a side facing the at least one wiper lip (14a; 14b; 14c; 14d), at least one stop surface (20a, 20a'; 20b, 20b'; 20c, 20c'; 20d, 20d') which, in at least one operating state, forms a stop for the at least one damping element (16a; 16b; 16c; 16d). According to the invention, the at least one stop surface (20a, 20a'; 20b, 20b'; 20c, 20c'; 20d, 20d') is at least substantially convex.