Retractable Roof Intermediate Link Nesting
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Solution Overview
Problem
Existing retractable roofs for vehicles protrude link members into the passenger compartment when in use, disfiguring the space and reducing comfort, and attempts to hide these links with trim pieces further narrow the compartment.
Innovation Solution
A retractable roof design featuring a segmental link mechanism where the intermediate link is placed between the outer and inner panel layers of the back roof panel, hidden from view, serving as a reinforcement and eliminating the need for additional cover pieces, thus widening the passenger compartment space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If link members are used to connect the roofing member with the vehicle body, then the retractable roof can change between in-use and retracted positions, but the link members protrude into the passenger compartment and disfigure the space
Solution Approach 1:
The intermediate link is nested within the back roof panel structure, specifically positioned between the outer and inner panel layers. This nesting approach allows the link member to perform its mechanical function while being concealed within the panel structure, eliminating the visual intrusion into the passenger compartment while maintaining full operational capability for roof position changes.
Solution Approach 2:
The link member is relocated from a horizontal arrangement (protruding into the passenger compartment) to a vertical arrangement (between outer and inner panel layers). This dimensional change allows the same mechanical function to be achieved without horizontal protrusion, thereby improving the appearance of the passenger compartment while maintaining operational functionality.
2Shape
If trim pieces are added to hide the link members, then the appearance of the passenger compartment is improved, but the passenger compartment space is narrowed
Solution Approach 1:
The intermediate link is merged with the back roof panel structure, becoming an integrated component rather than a separate element requiring additional coverage. The link is positioned between the outer and inner panel layers, effectively combining the structural function of the link with the panel assembly, thereby eliminating the need for separate trim pieces and preserving passenger compartment space.
Solution Approach 2:
The need for separate trim pieces is extracted and eliminated by integrating the link member directly into the back roof panel structure. By placing the intermediate link between the panel layers, the design removes the requirement for additional cosmetic coverings, thereby maintaining both appearance quality and maximum passenger space.
3Shape
If the intermediate link is placed between outer and inner panel layers, then the link is hidden from view and appearance is improved, but the structural complexity increases
Solution Approach 1:
The back roof panel structure is designed to serve multiple functions simultaneously: it provides the cosmetic outer surface, contains the intermediate link for mechanical operation, and maintains structural integrity. By integrating the link between the panel layers, the same structure achieves both aesthetic and functional requirements without requiring separate components, thereby managing complexity through multi-functionality.
Data Source
AI summary
A retractable roof includes a front roof panel, a back roof panel formed by joining outer and inner panel layers to each other, a lower link pivotally connected to a vehicle body member, an upper link pivotally connected to the front roof panel, and an intermediate link rigidly connected to each of the lower link and the upper link. The intermediate link is placed in between the outer and inner panel layers of the back roof panel.