Convertible Top Frame Locking Mechanism for Compact Storage
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Solution Overview
Problem
Existing convertible top systems require significant structural space for storage due to the arrangement of the closing bolt on the second frame element, which limits the dimensions of the rear-side convertible top storage box.
Innovation Solution
Repositioning the closing bolt onto the knee lever arrangement allows the actuating link to be fully rearward of the front edge of the second frame element, enabling the convertible top rod assembly to be compactly stored by pivoting the first link relative to the second link, thus eliminating the need for protrusions on the second frame element and integrating functions to save space and weight.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the closing bolt is arranged on the second frame element, then the locking function is achieved, but the second frame element must extend beyond the joint arrangement requiring larger storage box dimensions
Solution Approach 1:
The patent introduces a knee lever arrangement as an intermediary component between the first and second frame elements. The closing bolt is transferred from the second frame element to the knee lever arrangement, which acts as a mediator that enables the locking function while allowing the second frame element to be shorter and fully contained within the storage box.
Solution Approach 2:
The knee lever arrangement introduces a new dimensional aspect to the linkage system by adding a lever arm that pivots about a knee bearing. This dimensional change allows the closing bolt to be positioned at a different spatial location (on the knee lever rather than on the second frame element) while maintaining the locking function.
2Reliability
If the second frame element extends beyond the joint arrangement to accommodate the closing bolt, then the locking mechanism functions, but the structural space for storage increases
Solution Approach 1:
The closing bolt is extracted from the second frame element and relocated to the knee lever arrangement. This extraction allows the second frame element to be shortened and eliminates the need for it to extend beyond the joint arrangement, thereby reducing the overall length of stationary components.
3Reliability
If the locking element is mounted on the first frame element and interacts with a closing bolt on the second frame element, then the locking function is achieved, but protrusions are required on the second frame element
Solution Approach 1:
The closing bolt is merged with the knee lever arrangement by positioning it on the knee lever. This merging combines the closing bolt function with the knee lever structure, eliminating the need for separate protrusions on the second frame element and reducing device complexity.
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 configuration allows for a more compact storage position of the convertible top, reducing structural space requirements and integrating functions to enhance safety and cost-effectiveness while maintaining functional reliability.
Implementation Method 1
a locking element, which is mounted to rotate, interacts with a closing bolt and is adjustable between a locked position and an open position
Implementation Method 2
the first link element being pivotable relative to the second link element by an actuating link, which extends along the second link element
Implementation Method 3
the actuating link being connected to a knee lever arrangement connected to the first link element and the second link element
Data Source
AI summary
A convertible top of a cabriolet vehicle includes a convertible top rod assembly movable between a closed position spanning a vehicle interior and a storage position. The top rod assembly includes a link arrangement on opposing sides of the assembly. The link arrangement includes a main link and a main column pivotably mounted on a main bearing, and a front-side first link element and a second link element. The second link element is rearward of the first link element in the closed position and connected to the first link element by a joint arrangement, wherein the first link element being pivotable relative to the second link element by an actuating link extending along the second link element. A knee lever arrangement connected to the first link element, the second link element, and the actuating link includes a closing bolt.