Unfoldable Mast Stabilization via Inner Supporting Element
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Solution Overview
Problem
Unfoldable masts with closed cross-sectional profiles face challenges in maintaining stability and rigidity during the unfolding process, particularly in the transition region, due to the difficulty in supporting this area from the inside, leading to potential deformations and reduced load-bearing capabilities.
Innovation Solution
An apparatus with an unfolding mechanism that includes an inner supporting element and an outer fixing element forming a form-fitting and/or force-fitting connection, allowing the inner supporting element to be fixed axially without a direct mechanical connection, providing stabilization from the inside and preventing deformations during the unfolding of elongate hollow bodies with closed cross-sectional profiles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an inner supporting element is directly mechanically connected to the outer fixing element, then the stability in the transition region is improved, but the closed cross-sectional profile cannot be maintained and the mast becomes susceptible to torsional flexural buckling
Solution Approach 1:
The elongate hollow body itself serves as an intermediary element that indirectly connects the inner supporting element to the outer fixing element. The inner supporting element is received within the hollow body, and the outer fixing element engages the hollow body externally, creating a stable connection without direct mechanical attachment between the supporting element and fixing element, thus preserving the closed cross-sectional profile
Solution Approach 2:
The inner supporting element is nested within the elongate hollow body, which itself is nested between the inner supporting element and the outer fixing element. This nested arrangement allows the hollow body to act as a structural intermediary that maintains the closed cross-section while providing stability to the transition region
2Device complexity
If the transition region is left unsupported, then the structural simplicity is maintained, but the rigidity and stability are substantially reduced leading to deformations
Solution Approach 1:
The inner supporting element is specifically positioned within the transition region of the mast, providing localized reinforcement exactly where the cross-section is developing and stability is most needed. This targeted support improves rigidity without requiring reinforcement along the entire mast length, maintaining structural simplicity elsewhere
3Stability of the object's composition
If external supporting elements are added to stabilize the transition region, then the stability during unfolding is improved, but the device complexity and weight increase
Solution Approach 1:
The inner supporting element serves multiple functions: it provides structural support to the transition region, maintains the shape of the hollow body during unfolding, and works in conjunction with the outer fixing element to stabilize the mast. This multi-functionality reduces the need for additional separate supporting elements, thereby reducing overall device complexity
Solution Approach 2:
The elongate hollow body itself contributes to its own stabilization by serving as the structural medium that connects the inner supporting element to the outer fixing element. The hollow body's own structural properties are utilized to provide stability, reducing the need for heavy external supporting structures
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
The solution significantly enhances the stability and rigidity of the mast during unfolding by ensuring the inner supporting element remains fixed in the axial position, thereby improving the overall load-bearing capability and extending the use options of the mast.
Implementation Method 1
the inner supporting element and the outer fixing element are designed in such a manner that the inner supporting element interacts with the outer fixing element in the axial direction in a form-fitting and/or force-fitting manner
Implementation Method 2
the inner supporting element and the outer fixing element are designed in such a manner that the inner supporting element interacts with the outer fixing element in the axial direction in a form-fitting and/or force-fitting manner
Implementation Method 3
the individual shells because of their small wall thickness can be elastically deformed to form a flat band and can thereby be rolled up in a space-saving manner onto the winding core
Implementation Method 4
If the winding core is now rotated about its axis, the rolled-up, elongate hollow body is transferred from its rolled-up first state into an unrolled and unfolded second state
Data Source
AI summary
An apparatus for unfolding a rolled-up, elongate hollow body provides for stabilizing the unfolding body in a transition region. The hollow body has a closed cross-sectional profile. The unfolding mechanism has a winding core on which the hollow body is rolled up and compressed in a first state, and, by rotation, transfers the hollow body to an unrolled and unfolded second state. The hollow body is guidable between an outer fixing element positioned outside the hollow body and an inner supporting element which lies against an inner wall of the hollow body. The inner supporting element and outer fixing element interact in a form-fitting and/or force-fitting manner for axial positional fixing of the inner supporting element without a directed mechanical connection.