Motor Vehicle Door Hinge Fastening Device for Precise Gap Positioning
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Solution Overview
Problem
Existing fastening devices for motor vehicle door hinges fail to maintain an optimal gap profile between the door and the vehicle body's side wall cutout, leading to improper alignment and assembly challenges during manufacturing.
Innovation Solution
A fastening device comprising two hinges with a positionally fixed hinge element connected to the vehicle body via fastening screws and a torque strut, allowing precise gap positioning in the preassembly phase and secure attachment to the vehicle pillar in the final assembly phase, utilizing premanufactured openings with encircling play for precise adjustment and cohesive material joints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the door is inserted using a robot without precise positioning, then the assembly process is simple, but the join profile between the door and side wall cutout is not optimal
Solution Approach 1:
The hinge elements are pre-assembled on the door with precise gap positioning before door installation. This preliminary positioning ensures optimal join profile when the door is later installed, eliminating the need for complex real-time positioning during automated assembly.
Solution Approach 2:
The hinge elements incorporate adjustable parameters including encircling play in premanufactured openings and adjustable fastening positions. These parameter changes allow the hinge to adapt to slight variations in door positioning while maintaining optimal join profile.
2Ease of operation
If the hinge elements are fixed rigidly to the vehicle body, then the assembly is stable, but the door cannot be easily adjusted for optimal positioning
Solution Approach 1:
The hinge system transitions from a static rigid connection to a dynamic adjustable connection during assembly. The encircling play in openings and adjustable fastening mechanisms allow movement and adjustment during positioning, then lock into a stable fixed position once optimal alignment is achieved.
Solution Approach 2:
The hinge elements act as intermediaries between the door and vehicle body. They provide adjustment capability through their internal mechanisms (encircling play, adjustable fastenings) while ultimately providing stable connection to the vehicle body through the torque strut and fastening screws.
3Strength
If multiple fastening points are used to secure the hinge, then the connection is strong, but the assembly process becomes time-consuming
Solution Approach 1:
The fastening system is segmented into multiple independent fastening points distributed along the hinge element. This allows parallel assembly operations at different locations, maintaining strength while enabling more efficient assembly processes.
Solution Approach 2:
Multiple fastening functions are merged into integrated hinge components. The torque strut combines structural support with fastening function, and the hinge elements integrate positioning and fastening capabilities, reducing the number of separate assembly steps.
4Measurement precision
If the hinge elements are designed with adjustment capabilities, then the gap positioning is precise, but the device structure becomes more complex
Solution Approach 1:
Adjustment capabilities are implemented locally at specific critical points of the hinge structure rather than throughout the entire hinge. The encircling play in premanufactured openings and adjustable fastenings are placed only where gap positioning precision is needed, minimizing overall structural complexity.
Data Source
AI summary
In a preassembly position, the hinge elements of the two hinges of the vehicle door are each connected fixedly to the vehicle door via a pivotable hinge element of the two hinges. The vehicle door is held in position with precise gap positioning in a side wall door cutout of the vehicle body. In a final assembly position, the positionally fixed hinge element of the two hinges is connected to outer and inner wall parts of a vehicle pillar of the vehicle body via fastening screws and via a torque strut.