Vehicle Door Window Frame Snap Connection
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Solution Overview
Problem
Conventional vehicle door manufacturing is labor-intensive and expensive due to the welding process, making detachment for repair cumbersome.
Innovation Solution
A vehicle door design featuring a window frame with form-fitting engagement to a door frame using snap connections, eliminating the need for welding and allowing for easy assembly and disassembly without adhesive bonds, utilizing elastic snap hooks and projections for secure engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If welding process is used to fasten window frame to door frame, then connection strength is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The connection system is segmented into separate modular components: a window frame assembly with profiles and a door frame assembly with profiles. These segments can be manufactured independently and assembled through form-fitting engagement without welding, reducing manufacturing complexity while maintaining connection strength.
Solution Approach 2:
The welding process (thermal/chemical joining) is replaced with a mechanical form-fitting engagement system. The window frame profiles engage with door frame profiles through geometric interlocking, providing a mechanical connection that eliminates the need for complex welding operations while maintaining structural integrity.
2Strength
If welding process is used to fasten window frame to door frame, then connection strength is improved, but manufacturing cost increases
Solution Approach 1:
By segmenting the door assembly into separately manufacturable window frame and door frame components with standardized profiles, the manufacturing process becomes less costly. Each component can be produced using simpler, less expensive processes without requiring expensive welding equipment and skilled welders.
Solution Approach 2:
The connection method parameter is changed from thermal welding to mechanical form-fitting engagement. This parameter change transforms the manufacturing process from a high-cost, high-skill operation to a lower-cost, easier-to-execute assembly process while maintaining adequate connection strength for the application.
3Strength
If welding process is used to fasten window frame to door frame, then connection strength is improved, but ease of repair worsens
Solution Approach 1:
The connection system transitions from a permanent, static welded joint to a dynamic, reversible mechanical engagement. The form-fitting profiles can be assembled and disassembled multiple times, enabling easy repair and maintenance operations while providing sufficient connection strength during normal use.
Solution Approach 2:
The segmented modular design with standardized profiles allows the window frame to be easily separated from the door frame for repair or replacement. This modularity enables quick detachment without the cumbersome welding removal process, significantly improving ease of repair while maintaining connection integrity during service.
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 simplifies manufacturing, reduces costs, and facilitates easier repair by enabling a form-fitting engagement that is both secure and detachable, reducing the complexity and expense associated with traditional welding methods.
Implementation Method 1
utilizing elastic snap hooks and projections for secure engagement
Data Source
AI summary
A vehicle door, in particular a passenger door for a public transport vehicle, includes a window frame for receiving a window, which has at least one frame element for receiving a respective window edge of the window. The vehicle further includes a door frame for receiving the window frame. The door frame includes a door profile and the at least one frame element includes a window profile respectively, wherein the at least one window profile with reference to a movement in a release direction perpendicular to the window edge received by the respective frame element is engaged with a respective door profile in a form-fitting manner.