M-Shaped Adaptive Trim for Vehicle Grille Gap Control
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Solution Overview
Problem
Current vehicle exterior decoration assembly structures lack control over gaps between components, leading to increased costs and uniformity issues with the front bumper assembly and headlights.
Innovation Solution
An M-shaped self-adaptive decorative piece with snap-fit connections between the grille, plated trim, and bumper allows for controlled gap exposure and reduced assembly costs by using snap-fit and insert-fit mechanisms instead of screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screws are used to connect the grille and bumper, then the connection strength is improved, but the surface quality deteriorates due to shrink marks
Solution Approach 1:
The patent removes the screw connection method from the assembly process and replaces it with a snap-fit connection system. The grille and bumper are connected through integrated snap-fit structures that eliminate the need for protruding rods and screws, thereby preventing shrink marks on the bumper surface while maintaining connection strength.
Solution Approach 2:
The patent replaces the mechanical screw-fastening system with a snap-fit mechanical interlocking system. The snap-fit connection uses elastic deformation and geometric interlocking to achieve strong connections without visible fasteners, substituting the screw-based mechanical system with a more sophisticated snap-fit mechanism that preserves surface quality.
2Reliability
If screws are used to connect components, then the connection reliability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent merges multiple separate screw connections into a unified snap-fit connection system. The grille, decorative piece, and bumper are all connected through integrated snap-fit structures that are formed as part of the molding process, eliminating the need for separate fasteners and reducing assembly steps, thereby lowering manufacturing cost while maintaining connection reliability.
Solution Approach 2:
The snap-fit connection structures serve multiple functions: they provide mechanical connection, allow for controlled gap exposure, and enable easy assembly and disassembly. This multi-functionality replaces the need for separate connection mechanisms for each component, reducing the overall number of parts and manufacturing complexity.
3Device complexity
If no connecting structure is used between plated trim and decorative piece, then the device complexity is reduced, but the gap control precision deteriorates
Solution Approach 1:
The patent applies local quality by creating specific snap-fit connection zones at critical locations where gap control is needed. The decorative piece includes protrusions with snap-fit holes that engage with corresponding structures on the plated trim and bumper, providing localized precision control exactly where required rather than requiring complex overall structural designs.
Solution Approach 2:
The patent controls gap parameters through the geometric design of the snap-fit connections. The position, size, and orientation of the snap-fit holes and protrusions are precisely designed to control the exposed width of the decorative piece (4.0mm to 5.0mm), using parameter optimization in the connection geometry to achieve precise gap control.
4Reliability
If multiple separate connections are used for grille, decorative piece and bumper, then the assembly reliability is improved, but the assembly complexity increases
Solution Approach 1:
The patent merges the connection of the grille, decorative piece, and bumper into an integrated snap-fit assembly system. All three components are connected through a coordinated system of protrusions and snap-fit holes that engage simultaneously or in a simplified sequence, reducing assembly complexity while maintaining the reliability of multiple connection points through the distributed snap-fit structures.
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 ensures precise gap control between components, reduces assembly costs, and maintains uniformity of the front bumper assembly with headlights, enhancing overall fitting properties and manufacturing efficiency.
Implementation Method 1
the plated trim, the decorative piece and the bumper are relatively fixed to each other
Implementation Method 2
a first snap and a first snap-fit hole, a second snap and a second snap-fit hole, a third snap and a third snap-fit hole, a fourth snap and a fourth snap-fit hole
Implementation Method 3
a fifth snap and a fifth snap-fit hole, a sixth insert and a sixth insert-fit hole
Implementation Method 4
mating the fifth snap with the fifth snap-fit hole, mating the sixth insert with the sixth insert-fit hole
Data Source
Figure 1~1B
Figure 2~2B
Figure 2C~3
AI summary
An assembly structure is provided. The assembly structure comprises a grille (10); a plated trim (20) fixedly connected to the grille (10); a decorative piece (30) fixedly connected to the grille (10); and a bumper (40) fixedly connected to the grille (10) by passing through the decorative piece (30). The decorative piece (30) is partially exposed to the exterior between the plated trim (20) and the bumper (40). The decorative piece (30) has an M-shaped self-adaptive structure, which guarantees good fitting properties between the grille, the plated trim, the decorative piece and the bumper and absorbs the tolerances.