Panel Retention Structure With Elastic Neck For Thermal Movement
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Solution Overview
Problem
Existing panel retention structures face issues with adhesive failure and vibration-induced separation of roof panels from base panels, particularly when exposed to high-speed vehicle vibrations, and thermal deformation causes panel distortion.
Innovation Solution
A panel retention structure featuring a resin-made roof panel with a retention portion and a metal-made base panel joined by an adhesive, where a retention member with a neck, head, and flange portion is used. The neck passes through holes in both panels, the head is elastically contact with the roof panel, and the flange provides clearance to prevent separation and allow for thermal movement, ensuring secure attachment and maintaining panel alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the roof panel and base panel are joined by glue alone, then the structure is simple, but the joint may separate due to adhesive failure or vibration at high speed
Solution Approach 1:
The patent combines two retention methods: adhesive bonding (glue) and mechanical retention (retention member). The retention member includes a head portion that contacts the roof panel and a flange portion that contacts the base panel, working together with the adhesive agent to provide both simple structure and reliable joint stability against vibration and adhesive failure
Solution Approach 2:
The joint structure uses composite retention mechanisms: the retention member is made of resin material and combines mechanical retention (through head and flange portions) with chemical bonding (adhesive agent), creating a composite system that achieves both structural simplicity and high reliability
2Reliability
If the retention member rigidly fixes the roof panel to the base panel, then joint stability is improved, but the panel cannot accommodate thermal deformation
Solution Approach 1:
The retention member is designed with dynamic characteristics: the neck portion has elastic properties allowing it to flex, and the flange portion includes a clearance relative to the base panel. This enables the rigid retention structure to accommodate thermal expansion and contraction of the roof panel while maintaining joint stability
Solution Approach 2:
The patent introduces parameter changes through the clearance between the flange portion and base panel, and the elastic deformation capability of the neck portion. These parameter changes allow the retention member to adapt to thermal deformation of the roof panel while maintaining secure attachment
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 retention member effectively prevents panel separation due to adhesive failure or vibration, while allowing for thermal expansion and contraction, maintaining a smooth appearance and secure attachment.
Implementation Method 1
a state where an elastic wall being elastically in contact with an opposing surface serving as a surface of the retention wall which opposes the panel body is provided
Data Source
AI summary
A panel retention structure includes a retention member including a head portion, a neck portion and a flange portion being provided in the aforementioned order from an end of the retention member. The neck portion includes a dimension which is set smaller than a dimension of a first hole and a dimension of a second hole, and passes through the first hole and the second hole. The head portion is in contact with a confronting surface serving as a surface of a retention wall facing a panel body in one of a state where the head portion is elastically in contact with the panel body, and a state where an elastic wall being elastically in contact with an opposing surface serving as a surface of the retention wall which opposes the panel body is provided.