Rear Wiper Drive Holder Integrating Damping and Sealing
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Solution Overview
Problem
Rear window wiper systems for vehicles face challenges such as varying attachment points, high tolerance fluctuations, complex assembly processes, and excessive parts, leading to increased costs, noise transmission, and reduced sealing effectiveness.
Innovation Solution
A standardized holder with a latching element and integral damping and sealing elements, made from rubber-elastic material, is used to securely attach the wiper drive to the vehicle, reducing parts and improving ergonomics by eliminating the need for additional protective caps and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional attachment feet with spacer sleeves are used, then noise transmission is damped, but the number of parts increases and assembly complexity increases
Solution Approach 1:
The patent combines the damping function and sealing function into a single integrated holder component made of rubber-elastic material. This holder replaces the traditional separate spacer sleeves and sealing elements, reducing the number of parts while maintaining noise damping performance and providing sealing functionality.
2Reliability
If multiple separate sealing elements and protective caps are used, then sealing effectiveness is improved, but the number of parts increases and assembly complexity increases
Solution Approach 1:
The patent integrates the sealing element directly into the holder as an integral component. The holder itself forms the sealing interface with the glass surface, eliminating the need for separate protective caps and additional sealing elements. This reduces part count while maintaining reliable sealing through the rubber-elastic material's inherent sealing properties.
3Strength
If traditional assembly methods with multiple fasteners are used, then secure attachment is achieved, but assembly time increases and work ergonomics deteriorate
Solution Approach 1:
The holder is designed to be self-adhering to the glass surface through its rubber-elastic material properties, eliminating the need for separate fastening operations. The wiper drive attaches directly to the holder through a simple latching mechanism, enabling single-handed assembly and reducing cycle time while maintaining secure attachment.
4Productivity
If standardized holder with latching element is used, then assembly is simplified and cycle time is reduced, but attachment precision must be maintained
Solution Approach 1:
The patent utilizes the elastic deformability of the rubber-elastic holder material to accommodate minor position variations. The material's flexibility allows the holder to adapt to slight deviations in attachment position while maintaining secure connection and sealing, reducing the stringency of precision requirements without compromising assembly speed.
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 solution standardizes the interface with the vehicle, reduces parts and costs, enhances sealing precision, minimizes noise transmission, and simplifies assembly, resulting in improved work ergonomics and reduced cycle time on the assembly line.
Implementation Method 1
a damping element which is arranged between the latching element and the body part or the pane, it being an integral part of a rubber-elastic or elastomeric molded body (grommet) used to seal the assembly opening
Implementation Method 2
a sealing element which is designed in one piece with the damping element and which extends around the wiper shaft through the assembly opening
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a window wiper system for a vehicle, in particular a rear window wiper system (4) for a motor vehicle, having a wiper drive (6) for mounting in the interior of the vehicle, having a wiper shaft (8), which is driven by the wiper drive (6), for passing through an assembly opening (10) in a body part or in a window (2) of the vehicle, and having a wiper arm for mounting on the wiper shaft (8) outside the vehicle. It is provided that the wiper drive (6) can, after the wiper shaft (8) is passed through the assembly opening (10), be latched to a retainer (12) which can be fixedly mounted on the inner side of the body part or the window (2).