Quick-Release Screw Coupling for Multi-Part Assemblies
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Solution Overview
Problem
Existing quick screw connections for multi-part assemblies, particularly in electrotechnical devices, require lengthy screwing procedures or on-site shortening of screws/bolts, and often necessitate tool use, especially in challenging conditions like construction sites, and cannot handle interlocking threads effectively.
Innovation Solution
A quick screw connection featuring a threaded rod with flattened longitudinal sides and a divided nut with transverse nut pieces that can be twisted to engage and secure without tools, allowing for tool-free assembly and use with interlocking threads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If standard screws and nuts are used for connecting assemblies, then reliable thread engagement is achieved, but lengthy screwing procedures and tool use are required
Solution Approach 1:
The nut is divided into two separate nut pieces that can be independently manipulated. The first nut piece engages the thread initially, and the second nut piece is rotated to lock the connection, enabling quick assembly without traditional screwing procedures while maintaining reliable thread engagement
Solution Approach 2:
The threaded rod is pre-flattened at specific locations before assembly. This preliminary preparation allows the nut pieces to engage and lock quickly during assembly without requiring on-site shortening or modification of the rod, reducing assembly time while ensuring proper engagement
2Adaptability or versatility
If threaded rods are shortened on-site to accommodate smaller distances, then adaptability to different positions is improved, but additional tools and time are required
Solution Approach 1:
The threaded rod's geometry is modified by flattening specific portions along its length. This parameter change allows the rod to accommodate different assembly distances and positions without requiring on-site shortening, as the flattened sections provide engagement surfaces that work with the divided nut at various positions
3Stability of the object's composition
If interlocking threads are used to prevent loosening, then connection stability under dynamic loads is improved, but tool-free assembly becomes difficult
Solution Approach 1:
The connection is divided into two stages using two nut pieces: the first piece enables easy tool-free engagement by simply sliding onto the flattened rod, while the second piece provides the locking function with interlocking features that prevent loosening under dynamic loads, combining ease of operation with connection stability
Solution Approach 2:
The divided nut design allows the first nut piece to self-align and engage the flattened rod without tools, while the second nut piece automatically locks when rotated, achieving both tool-free assembly and stable connection under load
Data Source
Figure 1a~1c
Figure 2a~2b
Figure 3a~3d
AI summary
The invention relates to a quick-release screw coupling, more particularly for connecting multi-part assemblies that can be fixed in different positions in relation to each other, more particularly assemblies for electrotechnical equipment or applications, consisting of a first connecting part, formed as a threaded stud or screw (1), having an external screw thread, and consisting of a second connecting part, formed as a counter piece or nut, having an internal screw thread that complements the outer external screw thread. According to the invention, both the external screw thread and the internal screw thread are eliminated or flattened on at least two opposite longitudinal sides extending in the screw direction. Furthermore, the counter piece or nut transverse to the screw direction is split into at least one first (4) and a second (5) nut piece, wherein the first and the second nut piece can be rotated and tensioned with respect to each other by means of an external/internal thread pair (6; 7).