Modular Screwed Frame Clamping for Vibration-Stable Reassembly
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Solution Overview
Problem
Conventional screw frames used in ship hulls, such as submarines, face stability issues due to thread widening from repeated assembly and disassembly, leading to loose connections under vibration stress, making them unsuitable for mobile applications where space is confined and access is restricted.
Innovation Solution
A screw frame design featuring a clamping device with tensioning rods and sleeves that maintain stability by evenly distributing tensile and compressive forces across the frame, allowing for easy disassembly and reassembly without compromising structural integrity, and can be expanded in width using standardized components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If self-tapping screws are used to assemble the screw frame, then the frame can be disassembled and reassembled, but the threads widen after repeated assembly and disassembly, reducing stability
Solution Approach 1:
The patent extracts the fastening function from self-tapping screws and relocates it to clamping devices with clamping rods that clamp the cross beams between outer frame elements. This removes the thread-cutting operation that causes thread widening, while preserving the disassembly and reassembly capability. The clamping rods can be removed and reinstalled without damaging the frame elements.
Solution Approach 2:
The patent replaces the mechanical thread-cutting system with a clamping system that uses friction and normal force to secure the cross beams. Instead of relying on threaded connections that degrade with reuse, the clamping devices apply continuous compressive force to maintain stable connections through repeated assembly cycles.
2Length of moving object
If the screw frame is designed for disassembly and reassembly, then it can be transported through confined spaces, but the stability degrades under vibration stress
Solution Approach 1:
The patent removes the vulnerable threaded connection system and replaces it with clamping devices that are insensitive to vibration-induced loosening. The clamping rods apply continuous compressive force that prevents the cross beams from loosening under vibrational stress, while still allowing easy disassembly for transport through confined spaces.
3Ease of manufacture
If conventional screw frames are used in ship hulls, then they can be assembled in confined spaces, but they are unsuitable for mobile applications due to stability issues
Solution Approach 1:
The patent replaces the conventional screw connection system with a clamping system that is specifically suited for mobile applications. The clamping devices maintain stable connections under shock and vibration while remaining simple enough to assemble in confined spaces within ship hulls.
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 screw frame maintains high stability under shock and vibration, is easily transportable in confined spaces, and can be reassembled with consistent holding force, making it suitable for use in ship hulls and submarines where space is limited and access is restricted.
Implementation Method 1
maintain stability by evenly distributing tensile and compressive forces across the frame
Implementation Method 2
a force by means of which a frictional connection between a screw and one of these threads can be released
Data Source
Figure 1
Figure 2~4
AI summary
The invention relates to a screwed frame (1) for holding fitted elements, comprising a first external frame element (2), a second external frame element (4) and at least one first transverse strut (6) located between said two external frame elements (2, 4). The screwed frame (1) has at least one bracing device (8), which has at least one first bracing rod (40) and connects the first external frame element (2) to the second external frame element (4). The bracing device (8) extends from the first external frame element (2) to the second external frame element (4) and braces the first transverse strut (6) between the two external frame elements (2, 4). According to the invention, the screwed frame (1) has at least one screwed frame extension device (10) braced between the first transverse strut (6) and the second external frame element (4), said extension device having an internal frame element (12) and at least one second transverse strut (14) and extending the width of the screwed frame (1). In addition, the bracing device (8) has at least one bracing rod lengthening device (52) comprising a second bracing rod (110) and a coupler (50), which is used to connect the second bracing rod (110) to the first bracing rod (40) and/or an additional bracing rod, the length of the first transverse strut (6) corresponding to the length of the first bracing rod (40) and the length of the second transverse strut (14) corresponding to the length of the second bracing rod (110) in such a way that the sleeve (50) is located in the region of the internal frame element (12). Any number of internal frame elements (12) are located between the two external frame elements (2, 4). It is thus possible, in particular in narrow spaces, to carry out the assembly of the screwed frame (1) from only one side.