Pivoting Bay Window Mechanism for Caravan Living Space
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Solution Overview
Problem
Existing mobile home and caravan extensions with linear extendibility require complex mechanical guidance, leading to increased weight and reduced payload due to the need for precise alignment, which complicates the extension and retraction process.
Innovation Solution
A swiveling bay window mechanism using a simple, robust, and lightweight pivoting device with rigid levers and a servomotor for easy installation and operation, allowing for flexible placement and maintaining a compact form during travel while expanding living space during camping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If linear extendibility is used for the bay window, then the living space can be extended, but complex mechanical guidance is required which increases weight and reduces payload
Solution Approach 1:
Instead of extending the bay window linearly along the vehicle side, the invention inverts the approach by having the bay window pivot outward from the vehicle body like a door. This rotational movement eliminates the need for complex linear guidance mechanisms while achieving the same living space extension goal.
Solution Approach 2:
The bay window is designed with a curved outer surface that matches the pivot radius, allowing it to rotate smoothly around a pivot point. This curved geometry enables the bay window to swing outward in an arc, simplifying the mechanical requirements compared to linear extension while maintaining structural integrity and sealing capability.
2Reliability
If linear extendibility with precise guidance is implemented, then the bay window can be extended reliably, but additional weight is added which reduces payload capacity
Solution Approach 1:
The invention replaces weight-intensive linear guidance systems with a lightweight rotational pivot mechanism. By inverting the extension approach from linear to rotational, the mechanical structure required is significantly simplified and lighter, while reliability is maintained through the simplicity and robustness of the pivot connection.
3Manufacturing precision
If complex mechanical guidance is provided for linear extension, then precise alignment is achieved, but the payload of the mobile home is significantly reduced
Solution Approach 1:
The patent inverts the extension mechanism from linear to rotational, eliminating complex alignment requirements. The pivot point provides natural rotational alignment, and the curved bay window design ensures proper orientation throughout the swinging motion, achieving necessary precision without weight-intensive guidance components that would reduce payload capacity.
4Shape
If the pivot axis is arranged inside the vehicle, then the outer contour remains unchanged during driving, but space requirements inside the vehicle increase
Solution Approach 1:
The pivot mechanism and associated components are nested within the vehicle's internal structure, utilizing existing spaces and contours. The pivot axis is positioned to minimize intrusion into living space, and the bay window swings outward without requiring significant internal volume, effectively nesting the mechanism within the vehicle's structural envelope.
Data Source
Figure 1~2
AI summary
A motorhome or caravan with a temporary living space extension consisting of an extendable bay window (1) with a lateral outer surface (2) and surrounding side surfaces (3;4) is provided, which is mechanically simple, lightweight and functionally reliable, which is achieved by arranging a pivoting device (3) on the bay window (1) and making the bay window (1) movable into a rest position pivoted into the motorhome or caravan and into a usable position pivoted out of the vehicle.