Fastening Nut Projection Tilting Assembly
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Solution Overview
Problem
Existing fastening devices for components, particularly in control cabinets, face challenges with metallic materials, requiring high forces for installation, leading to complex and expensive designs.
Innovation Solution
A fastening device with a projection unit that protrudes into the through-hole, allowing easy assembly by tilting and engaging with a turning tool, featuring a form-fitting contour and internal thread for secure attachment, and utilizing a cap nut for additional sealing and clamping forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bending unit is used to fasten metallic materials to the wall, then reliable fastening is achieved, but very high forces are required and the pliers construction becomes particularly complex and expensive
Solution Approach 1:
The fastening device is divided into separate functional units: a base body unit with internal thread and a fastening unit (fastening nut) with external thread. This segmentation eliminates the need for complex pliers construction by allowing the fastening mechanism to be simplified into basic threading and bending operations that can be performed with standard tools.
Solution Approach 2:
Instead of bending the base body to achieve fastening, the invention inverts the approach by providing a pre-formed bending unit in the fastening nut that bends upon insertion. This reversal of the bending action simplifies the overall device complexity while maintaining reliable fastening of metallic materials.
2Ease of operation
If a projection unit protruding into the through-hole is used, then easy assembly by tilting is enabled, but the structure becomes more complex
Solution Approach 1:
The projection unit is merged with the base body unit as an integrated feature rather than a separate component. This combining approach enables easy tilting assembly while avoiding the complexity of additional separate parts, as the projection serves multiple functions including guiding insertion and providing structural support.
Solution Approach 2:
The projection unit serves multiple functions: it guides the base body unit into the through-hole during tilting insertion, provides structural support, and works in conjunction with the form-fitting contour to ensure proper positioning. This multi-functionality reduces the need for additional components while maintaining ease of assembly.
3Strength
If high forces are applied to bend the bending unit for metallic materials, then secure connection is ensured, but the installation process becomes more difficult and expensive
Solution Approach 1:
The fastening nut is designed to automatically generate the required bending force upon insertion into the base body unit without requiring external high-force tools. The interaction between the form-fitting contour and the internal thread structure enables the bending unit to self-adjust and secure the connection, eliminating the need for expensive specialized installation equipment.
Solution Approach 2:
The invention changes the parameters of the fastening mechanism by using a threaded connection combined with a controlled bending action rather than requiring extremely high forces. The thread pitch, bending unit geometry, and material properties are optimized to achieve secure connections with moderate installation forces, making the process easier and more economical.
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
Enables quick, easy, and reliable assembly with reduced force requirements, ensuring secure attachment and high stress resistance without complex designs or high costs.
Implementation Method 1
a projection unit which protrudes into the through-hole when the base body unit is attached to the wall, but does not protrude, and bears against the inner wall of the through-hole
Implementation Method 2
the thread of the shank area is designed as an external thread and the thread of the base body unit is designed as an internal thread
Implementation Method 3
has a form-fitting contour which is at least partially present on the inner wall of the continuous recess and on which a counter-form-fitting contour can be connected
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The fastening device (10) has fastening nut (40) with continuous recess (42) and head portion with two regions (52). The distance between outer edge contours of region is greater than cross sectional dimension of through hole (12). A shaft portion has external thread (46) that is screwed in internal thread (30) of the base unit (24). A form-fitting profile (44) located at inner wall of recess is connected with mating form-fitting profile of rotating tool through the recess (26) of the base unit.