Wiper Arm Element Cross-Section Segmentation for Connection Stability
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Solution Overview
Problem
Existing wiper arm devices face challenges in achieving a cost-effective and simple manufacturing process while ensuring a stable and efficient connection between the wiper arm element and the fastening part, particularly in maintaining a consistent cross-sectional surface and efficient articulation.
Innovation Solution
A wiper arm device with an integrally formed wiper arm element featuring a longitudinal extent of at least 10% of the total, having a cross section that is substantially U-shaped, L-shaped, or I-shaped, with a constant cross-sectional surface, and arranged perpendicular to the longitudinal direction, facilitating a direct or indirect connection to a fastening part and wiper arm adapter, thereby simplifying production and attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wiper arm element is integrally formed with a complex cross-section varying along its length, then the connection stability and articulation efficiency are improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The wiper arm element is divided into multiple portions along its longitudinal extent, where at least one portion has a cross-section differing from a U-shaped cross-section. This segmentation allows different portions to have optimized cross-sectional geometries for their specific functional requirements while maintaining integral construction, thus improving connection stability without excessively increasing manufacturing complexity.
Solution Approach 2:
Different portions of the wiper arm element are assigned different cross-sectional characteristics tailored to their local functional demands. The first portion near the fastening part has optimized geometry for articulation, while other portions have geometries suited for their specific roles, achieving local optimization of connection stability and articulation efficiency without requiring complex varying cross-sections throughout the entire element.
2Ease of manufacture
If the wiper arm element has a constant cross-sectional surface, then the manufacturing process is simplified and costs are reduced, but the articulation efficiency and connection stability may be compromised
Solution Approach 1:
The wiper arm element is segmented into portions with different cross-sectional characteristics. At least one portion has a cross-section that differs from a U-shaped cross-section, allowing this specific portion to maintain constant cross-sectional surface for manufacturing simplicity while other portions have optimized cross-sections for articulation efficiency, thus resolving the contradiction between manufacturing simplicity and articulation performance.
Solution Approach 2:
Different portions of the wiper arm element are assigned different cross-sectional qualities based on their functional requirements. The portion requiring high articulation efficiency has an optimized cross-section, while other portions have constant cross-sectional surfaces for manufacturing simplicity, achieving local optimization that balances both requirements.
3Reliability
If the wiper arm element portion has a cross-section different from U-shaped, then the articulation and connection performance are improved, but the manufacturing complexity increases
Solution Approach 1:
The wiper arm element is divided into portions, with at least one portion having a cross-section different from U-shaped. This segmentation limits the complexity to specific portions rather than the entire element, improving connection performance where needed while keeping other portions simpler for manufacturing.
Solution Approach 2:
Specific portions of the wiper arm element are assigned non-U-shaped cross-sections optimized for their local connection and articulation requirements, while other portions maintain simpler cross-sections. This local differentiation improves connection performance without requiring complex cross-sections throughout the entire element.
Data Source
AI summary
The invention relates to a wiper arm device with an integrally formed wiper arm element (10) which is provided with a fastening part (12) for articulated connection and which has at least one wiper arm element portion (14) with a longitudinal extent of at least 10% of the total longitudinal extent of the wiper arm element (10). According to the invention, it is proposed that the wiper arm element portion (14) has a cross-section that differs from an at least substantially U-shaped cross-section.