Headlamp Frangible Bracket With Elongated Indexing Hole for Vibration Control
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Solution Overview
Problem
Conventional motor vehicle projectors face challenges in maintaining optimal positioning and rigidity, leading to vibrational phenomena and optical flicker effects during vehicle operation, due to the presence of frangible zones in the front anchoring leg.
Innovation Solution
The carrier box for motor vehicles features a unique design for the front anchoring paw with a vertical frangible bonding area composed of multiple binding appendages and primer holes, which preserves indexing and mechanical rigidity while avoiding flexional vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a frangible zone is provided in the front anchoring bracket to limit injury risks in pedestrian impacts, then safety is improved, but the rigidity of the anchoring bracket is significantly reduced, causing vibration phenomena in bending during driving
Solution Approach 1:
The front anchoring bracket is segmented into a rigid proximal part (connected to the housing) and a frangible distal part (connected to the vehicle structure), separated by a frangible connection zone. This segmentation allows the proximal part to maintain rigidity for stable headlight positioning while the distal part provides frangible protection for pedestrians.
Solution Approach 2:
Different parts of the front anchoring bracket have different mechanical properties: the proximal part is designed with high rigidity to prevent vibrations, while the frangible connection zone is designed with controlled weakness to break in pedestrian impact scenarios. This local differentiation of material properties resolves the contradiction between overall rigidity and localized frangibility.
2Stability of the object's composition
If the front anchoring bracket is made rigid to avoid vibrations, then stability is improved, but the ability to absorb dimensional dispersions between vehicle structural elements is reduced
Solution Approach 1:
The anchoring system is divided into a rigid proximal anchoring lug that provides stable positioning, and a frangible distal anchoring lug that can break to accommodate dimensional variations in vehicle structural elements. The indexing means on the rigid proximal part ensures stable positioning while the frangible distal part provides adaptability.
Solution Approach 2:
The proximal part of the front anchoring bracket is designed with high rigidity and indexing means for stable positioning, while the distal part is designed with frangible characteristics to absorb dimensional dispersions. This local differentiation allows the system to simultaneously achieve stability and adaptability.
3Manufacturing precision
If the frangible connection zone is oriented vertically to preserve indexing and reduce vibrations, then positioning precision is improved, but the structural complexity of the anchoring lug increases
Solution Approach 1:
The anchoring lug is segmented into proximal and distal parts connected by a vertical frangible connection zone. This segmentation allows the indexing means to be positioned on the rigid proximal part where vertical orientation preserves indexing precision, while the frangible connection zone maintains a simple geometric form to minimize added complexity.
Solution Approach 2:
The vertical frangible connection zone is implemented only in the critical region where indexing precision is required, while other parts of the anchoring lug maintain simple structures. This localized application of the vertical orientation principle improves positioning precision without significantly increasing overall structural complexity.
Data Source
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AI summary
The invention relates to a headlight housing (10) having a hollow body (11), a rear anchoring bracket (20) extending in a horizontal mean plane to the rear of said body and having a drilled opening (21) for its fixation, and anti-translation indexing means engaging along a vertical axis (22), and a front anchoring bracket (30) extending on the inner side of said body and also having a drilled opening (36) for its fixation; said front anchoring bracket comprising a proximal part (31) extending along a vertical transverse mean plane and being connected by one of its lateral edges to said body via a vertical frangible connection zone, and a distal part (35) extending towards the rear along a horizontal mean plane from the upper edge of said proximal part and in which there is formed an oblong anti-rotation indexing hole (37) extending horizontally and being oriented in a radial direction to said vertical axis.