Rubber Guide Rail for Flush Vehicle Window Alignment
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Solution Overview
Problem
High-end vehicle doors with flush windows are expensive and complex to manufacture and install, and existing guide rail systems do not ensure perfect guidance of the window along both longitudinal and transverse axes, often requiring modifications to the door frame.
Innovation Solution
A guide rail system made of rubber elastomer or thermoplastic elastomer materials, with a low-friction inner coating and ovoid guide heads, that adapts to curved door shapes and manufacturing tolerances, allowing for flush window installation without modifying the door frame, using co-extruded materials for cost-effectiveness and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aluminum guide rails with three sealing lips are used, then the window can be guided along both longitudinal and transverse axes, but the manufacturing cost increases and the assembly complexity increases
Solution Approach 1:
The patent extracts the guidance function from a complex multi-lip sealing system and implements it through a simplified single-channel rail geometry. The U-shaped cross-section with rounded bottom corner provides guidance along both x and y axes through its inherent geometric constraints, eliminating the need for multiple sealing lips while maintaining guidance precision.
Solution Approach 2:
The patent changes the geometric parameters of the guide rail, specifically using a U-shaped cross-section with a rounded bottom corner having a radius R1 between 3-7mm. This parameter optimization allows the rail to guide the window pad smoothly along both longitudinal and transverse axes while reducing manufacturing complexity and cost.
2Reliability
If aluminum guide rails are used, then the window can be guided properly, but the manufacturing cost increases
Solution Approach 1:
The patent replaces expensive aluminum guide rails with cost-effective plastic materials that can be manufactured through injection molding. The plastic guide rail maintains the necessary guidance precision while significantly reducing material cost and manufacturing complexity compared to aluminum alternatives.
Solution Approach 2:
The patent employs plastic materials with specific mechanical properties to create a guide rail that combines cost-effectiveness with functional performance. The plastic material provides sufficient rigidity for guidance while allowing for economical mass production through standard plastic molding processes.
3Shape
If a complete module assembly is used, then the window can be installed flush with the door, but the assembly process becomes different from standard assembly and may require production line modifications
Solution Approach 1:
The patent divides the window assembly into separate components: the window pane, the guide rail, and the mounting brackets. This segmentation allows each component to be manufactured and assembled independently using standard processes, eliminating the need for specialized complete module assembly while still achieving the flush appearance through proper component positioning.
Solution Approach 2:
The guide rail serves multiple functions: it provides mechanical guidance along both axes, maintains the flush appearance, and integrates with standard door structures through universal mounting brackets. This multi-functionality eliminates the need for production line modifications while achieving all desired outcomes.
4Adaptability or versatility
If the guide rail is made to adapt to all curved shapes of the door frame, then the window can be properly positioned, but the manufacturing complexity increases
Solution Approach 1:
The patent employs a flexible mounting bracket that can adapt to various door frame shapes and curves. The bracket's flexibility allows it to conform to different geometries without requiring complex custom-shaped guide rails, thereby maintaining simple rail geometry while achieving universal adaptability.
Solution Approach 2:
The mounting bracket is designed with dynamic adjustment capabilities, allowing it to adapt to different door frame configurations. This dynamic adaptability eliminates the need for complex pre-formed guide rail geometries for each door shape, simplifying manufacturing while maintaining versatility.
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 provides a cost-effective, simple-to-produce guide rail system that maintains window alignment along both axes, ensuring a flush fit with the door frame, reducing production costs and installation complexity while accommodating various door shapes and tolerances.
Implementation Method 1
The guide rail (5) comprises an inner coating (56) which lines the internal wall of the cavity (52). This inner lining (56) is made of a material with a low coefficient of friction which promotes sliding of the pad (4).
Implementation Method 2
The guide rail system made of rubber elastomer or thermoplastic elastomer materials, with a low-friction inner coating and ovoid guide heads, that adapts to curved door shapes and manufacturing tolerances
Data Source
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AI summary
The invention relates to a device for guiding a sliding window (28) in a door (2) of a motor vehicle, which comprises a guide rail (5) and at least one guide runner (4) secured to the inner face of said sliding window (28), said guide rail (5) being provided with a cylindrical longitudinal cavity (52), said guide runner (4) comprising at least one guide head (42) fitted in said cavity (52). Said guide runner (4) is rigid and the guide head (42) thereof comprises at least three flat parts (420) that extend radially from an axis (421) of the runner head, and said guide rail (5) surrounds said guide head (42) such that the free ends (422) of each flat part (420) of the guide head (42) bear permanently against the inner wall of said longitudinal cavity (52).