Trunk Lid Frame Diagonal Hinge Fastening Stiffness
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Solution Overview
Problem
Conventional trunk lid structures experience flexing issues due to the design of hinge installation bearing surfaces, leading to reduced stiffness, which affects the overall structural integrity and functionality.
Innovation Solution
The trunk lid frame structure features diagonally arranged fastening parts of hinge arms along the lengthwise direction of V-shaped beading parts, directly integrating hinge installation bearing surfaces onto the beading parts, and incorporating stiffening members and continuous beading parts to enhance stiffness and prevent stress concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If hinge installation bearing surfaces are formed in the vicinities of the end parts of beading parts, then the structure is simpler, but flexing occurs between hinge arms and beading parts reducing stiffness
Solution Approach 1:
The hinge installation bearing surface is merged with the beading part by forming the bearing surface directly on the beading part itself. This integration eliminates the gap between the hinge arm and beading part, preventing flexing while maintaining structural simplicity. The bearing surface and beading structure become a unified component rather than separate elements.
2Ease of manufacture
If fastening parts are arranged parallel to beading parts, then alignment is easier, but flexing occurs reducing structural integrity
Solution Approach 1:
The fastening parts of the hinge arms are arranged diagonally relative to the beading parts rather than parallel to them. This asymmetric arrangement creates a more rigid structural configuration that prevents flexing between the hinge installation section and beading part, thereby improving structural integrity while still being manufacturable.
3Strength
If beading depth is increased to improve stiffness, then structural strength improves, but formability decreases
Solution Approach 1:
The beading part is designed with locally optimized characteristics where the cross-sectional shape and depth are tailored to specific functional requirements. The beading has sufficient depth at critical locations to prevent flexing and provide stiffness, while other areas maintain formability for manufacturing. This localized optimization allows the structure to achieve necessary stiffness without compromising overall formability.
Data Source
AI summary
In the present frame structure of a trunk lid: the trunk lid has an outer panel and an inner panel, and is formed such that its cross-section is approximately L-shaped, with a top face part and a rear face part; left and right hinge installation sections are provided, and a lock installation section is provided in the left to right center of the rear face part; left and right beading parts are provided on the inner panel; and fastening parts of hinge arms are arranged diagonally along the lengthwise direction of the left and right beading parts.