Motor Vehicle Headlamp Coupling Rod Adjustment
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Solution Overview
Problem
Existing motor vehicle headlight systems face challenges in adjusting the light modules' positions relative to each other after assembly, particularly with large and heavy modules that are not centered, leading to instability and play in the light distribution, which complicates achieving conformant light distributions.
Innovation Solution
A motor vehicle headlight design featuring a coupling rod with a threaded connection and a worm gear mechanism allows the second light module to rotate about its horizontal axis without affecting the first light module's position, enabling adjustments even after installation, using ball joints for low-friction mounting and articulated connections to compensate for moments, and employing fixed bearings to stabilize the modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the second light module is mounted in floating bearings to enable adjustment relative to the first light module, then the adjustability is improved, but the mechanical stability deteriorates due to instability and play in the light distribution
Solution Approach 1:
The patent implements a dynamic adjustment mechanism where the coupling rod can be selectively extended or retracted. During installation, the rod is extended to enable positioning adjustments. After adjustment, the rod is retracted to lock the light modules in their final positions, eliminating play while maintaining the ability to adjust when needed.
Solution Approach 2:
The coupling rod is divided into multiple sections that can be independently adjusted. This segmentation allows for precise positioning of the second light module relative to the first, enabling fine-tuning of the light distribution while maintaining structural stability through the modular connection system.
2Shape
If the light modules are strongly swept and offset from one another to achieve modern design, then the aesthetic and functional performance is improved, but the adjustment complexity increases due to coordinated adjustment requirements
Solution Approach 1:
The patent combines the adjustment mechanisms of multiple light modules into a single coordinated system. The coupling rod connects the second light module to the first, allowing a single adjustment action to simultaneously position both modules correctly, even when they are offset and strongly swept, thereby reducing overall adjustment complexity.
Solution Approach 2:
The coupling rod serves multiple functions: it provides mechanical support, enables positional adjustment, maintains proper spacing between offset modules, and ensures coordinated movement. This multi-functionality simplifies the overall adjustment system despite the complex geometry of strongly swept modules.
Data Source
AI summary
The present invention relates to a motor vehicle headlamp (10) comprising a housing (16), a first light module (12) and a second light module (14), wherein the two light modules are pivotable about mutually orthogonal axes. The two light modules (12, 14) are movably connected via a coupling rod (26), so that both the light modules are pivotable at the same time and by the same pivoting angle. The headlamp is characterized in that the coupling rod (26) has a first rod-shaped coupling element (34) and a second rod-shaped coupling element (36), wherein the first coupling element of the two rod-shaped coupling elements is movably articulated to the first light module at a third point of the first light module and the second coupling element of the two rod-shaped coupling elements is movably articulated to the second light module at a third point of the second light module, and wherein the coupling elements (34, 36) are mutually connected by means of a threaded connection which allows variation in the length of the coupling rod.