Light Strip Attachment Device Thermal Expansion Management
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Solution Overview
Problem
Existing attachment devices for light strips on motor vehicles fail to accommodate thermal expansion effectively, leading to potential thermal stresses and misalignment due to rigid mounting.
Innovation Solution
The use of attachment bolts with groove-shaped recesses and a central, flexible attachment mechanism, such as a curved spring plate or coil spring, allows the light strip to expand and move freely in the X direction, ensuring defined expansion and alignment with the vehicle body shell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the light strip is rigidly mounted to the vehicle body shell, then precise alignment and fixed position are achieved, but thermal expansion causes thermal stresses and misalignment
Solution Approach 1:
The central attachment bolt is designed with a curved spring plate that allows dynamic movement in the X direction. The spring plate can elastically deform to accommodate thermal expansion of the light strip while maintaining connection, transforming the rigid static connection into a flexible dynamic one that adapts to dimensional changes.
Solution Approach 2:
The attachment system changes the mechanical parameter of connection rigidity. The outer attachment bolts maintain rigid fixed connections for precise positioning, while the central attachment bolt introduces flexibility through the spring plate, allowing controlled movement to absorb dimensional changes from thermal expansion.
2Stability of the object's composition
If the light strip is securely fixed at both ends, then stable positioning is achieved, but thermal expansion is restricted causing stress
Solution Approach 1:
Different attachment characteristics are applied to different locations of the light strip. The outer attachment bolts at both ends provide rigid fixed connections for stable positioning, while the central attachment bolt provides a flexible connection that allows movement. This local differentiation of attachment quality enables both stability and stress relief.
3Reliability
If the light strip is allowed to move freely, then thermal expansion is accommodated, but precise alignment and fixed position are lost
Solution Approach 1:
The attachment system is segmented into three distinct attachment points with different functions. The two outer attachment bolts provide fixed rigid connections for precise positioning, while the central attachment bolt provides flexible movement capability. This segmentation allows the system to simultaneously achieve both precise alignment and thermal expansion accommodation.
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
This solution enables precise and stress-free thermal expansion of the light strip, maintaining alignment and accommodating material differences in thermal loads, thereby preventing misalignment and stress.
Implementation Method 1
The spring plate supports itself elastically with its free projecting ends on the vehicle body shell so that the light strip is free to move in the X direction
Implementation Method 2
The spring plate may be replaced by a coil spring. The spring plate or the coil spring allows the light strip to expand
Implementation Method 3
Any expansion of the light strip in the longitudinal direction of the vehicle can thus be made possible with a defined permitted movement of the light strip
Data Source
AI summary
An attachment device for a light strip on the tail or the nose of a motor vehicle is provided. The light strip is connected in a securely fixed manner at its free ends by attachment bolts. A further attachment bolt and a spring bias a central region of the light strip toward the vehicle, but permit limited movement of the light strip away from the vehicle in response to expansion of the light strip.