Wiper Mounting via Spring Strut Dome Vibration Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional wiper system fastening methods in vehicles lead to unwanted noise due to vibration transmission from the wiper system to the vehicle's cross member, and existing solutions fail to effectively address space constraints and safety requirements, especially in pedestrian crash scenarios.
Innovation Solution
A fastening system where the wiper system is connected only to the spring strut dome, with a fastening element that is welded or securely attached to the dome, preventing vibration transmission to the cross member and utilizing an elastically deformable coupling element for easy detachment in crashes, thereby enhancing safety and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wiper system is fastened to a cross member of the vehicle body, then the wiper system can be securely mounted, but vibrations from the wiper system are transmitted to the cross member causing unwanted noise in the vehicle interior
Solution Approach 1:
The patent introduces a spring strut dome as an intermediary mounting structure between the wiper system and the vehicle body. The fastening element connects the wiper system to the spring strut dome, which itself is connected to the cross member, thereby isolating the vibration path and preventing direct transmission of vibrations to the vehicle body structure.
Solution Approach 2:
The mounting system is segmented into distinct components: the wiper system, the fastening element, the spring strut dome, and the cross member. This segmentation allows the spring strut dome to act as a vibration isolation zone, separating the vibration source from the vehicle body while maintaining structural integrity.
2Reliability
If additional fastening elements like spring strut braces are used to secure the wiper system, then the wiper system can be firmly attached, but the fastening complexity and number of components increase
Solution Approach 1:
The patent combines the fastening function with the existing spring strut dome structure. Instead of adding separate braces or mounting elements, the spring strut dome itself serves as the fastening structure, integrating the mounting function into an already-present component and reducing overall system complexity.
Solution Approach 2:
The spring strut dome serves multiple functions: it provides structural support for the windshield, acts as a mounting structure for the wiper system, and functions as a vibration isolation element. This multi-functionality eliminates the need for additional dedicated fastening components.
3Reliability
If the wiper system is relocated to a region not affected by deformation in pedestrian crash scenarios, then safety is improved, but space constraints often prevent such relocation
Solution Approach 1:
The spring strut dome acts as an intermediary structure that allows the wiper system to be mounted in the deformation zone while maintaining safety. The dome's elastic properties enable it to deform during a crash, absorbing energy and protecting occupants, while still providing a secure mounting point for the wiper system.
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 effectively dampens vibrations within the spring strut dome, reducing noise in the vehicle interior and improving safety by isolating the wiper system's vibrations and allowing for easy detachment during crashes, while maintaining a secure and accessible fastening mechanism.
Implementation Method 1
Due to its usually high mass, this is able to effectively dampen the vibrations of the wiper system and thus to avoid vibration-related noise development in the vehicle
Implementation Method 2
the fastening element is welded to a coupling section of the spring strut dome
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The device has a fastening element (16) and a spring strut dome (5), where a wiper system (3) is fastened to a coupling section (6) of the spring strut dome by the fastening element. The fastening element is only connected with the spring strut dome and with the wiper system. The fastening element is welded to the coupling section of the spring strut dome. The spring strut dome has a central dome opening in the coupling section.