Vehicular Trunk Lid Panel Bead and Adhesive Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicular trunk lid panels face challenges in achieving sufficient tensile and torsional rigidity in the upper surface section, with existing designs lacking effective solutions to enhance these properties.
Innovation Solution
The design incorporates a plurality of beads on the inner upper surface section that extend along a predetermined direction, arrayed intermittently in a crossing direction, with adhesive members supporting the outer panel, and a reduced interval between adjacent beads to improve rigidity, while the outer panel is formed of aluminum or aluminum alloy with a specific adhesive member interval to maintain structural integrity and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive members are spaced far apart to reduce manufacturing cost and complexity, then the tensile rigidity of the outer panel deteriorates
Solution Approach 1:
The support function is segmented between two distinct structural elements: beads formed on the inner panel and adhesive members connecting the panels. The beads provide continuous structural support while adhesive members are positioned only at critical intervals, dividing the support mechanism into complementary parts that collectively enhance tensile rigidity without requiring dense adhesive placement
Solution Approach 2:
The beads are strategically formed at specific locations on the inner panel where structural support is most needed, particularly at positions corresponding to adhesive member locations. This local reinforcement allows the adhesive members to be spaced farther apart while maintaining overall panel rigidity, as the beads provide localized support where the adhesive connections occur
2Weight of moving object
If plate thickness is reduced to lower weight and cost, then the bending rigidity of the trunk lid panel deteriorates
Solution Approach 1:
Beads with curved cross-sections are formed on the inner panel surface. These curved structural elements inherently provide higher bending resistance compared to flat surfaces of the same thickness, allowing the use of thinner aluminum panels while maintaining or improving overall bending rigidity of the trunk lid assembly
Solution Approach 2:
The trunk lid panel employs a composite structure consisting of an inner panel with formed beads and an outer panel connected by adhesive members. This composite construction creates a stiffened panel system where the bead-formed inner panel acts as a substrate that enhances the bending rigidity of the thinner aluminum outer panel, achieving steel-like performance with lighter material
Data Source
AI summary
A vehicular trunk lid panel includes an inner panel that includes an inner upper surface section and an inner rear surface section, an outer panel that includes an outer upper surface section and an outer rear surface section, and a plurality of adhesive members, in which the inner upper surface section includes a plurality of beads, each bead includes a support section that supports the adhesive members, each adhesive member is arranged on the support section so as to be arrayed intermittently along a predetermined direction, and a support section interval between the support sections adjacent to each other with respect to a crossing direction is smaller than an adhesive member interval between the adhesive members adjacent to each other on each of the support sections.