Plug-in Nut Anti-Twisting Clasp for Switch Cabinet
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Solution Overview
Problem
State-of-the-art fastening arrangements often experience accidental twisting of the plug-in nut within the profile strut's aperture, leading to issues with screwing in or jamming of bolts.
Innovation Solution
A fastening arrangement with a clasp having actuating ends that project out of the aperture, featuring a U-shaped receptacle to secure the plug-in nut, preventing twisting by engaging the aperture's edge, and allowing manual or tool-assisted release positions to disengage the edge from the receptacle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the plug-in nut is mounted in the aperture of the profile strut, then the fastening arrangement can be assembled, but the plug-in nut may be accidentally twisted in the aperture
Solution Approach 1:
The clasp is divided into two separable parts: a first part integrated with the plug-in nut and a second part integrated with the profile strut. These parts can be assembled and disassembled independently, allowing easy assembly while providing reliable anti-twisting function when engaged.
Solution Approach 2:
The clasp acts as an intermediary element between the plug-in nut and the profile strut. It mediates the connection by engaging the edge of the aperture with its receptacle, preventing twisting while allowing straightforward assembly and disassembly operations.
2Reliability
If the plug-in nut is securely fixed in the aperture, then accidental twisting is prevented, but the actuating ends must be designed for tool-assisted operation
Solution Approach 1:
The clasp is designed with elastic properties, allowing it to be dynamically deformed during assembly and disassembly. In the engaged state, it provides rigid securing; during operation, it can be elastically deformed to release the edge of the aperture, enabling controlled disengagement.
Solution Approach 2:
The actuating ends are pre-configured to apply force in a specific direction that initially overcomes the elastic retention force of the clasp. This preliminary action direction ensures that the edge of the aperture is released from the receptacle before any twisting motion occurs.
3Reliability
If the clasp is designed with a receptacle for the aperture edge, then the plug-in nut is prevented from twisting, but the device complexity increases
Solution Approach 1:
The clasp is implemented as a thin-walled elastic component that can be formed into the required shape with a receptacle. This thin-film approach provides the necessary mechanical function with minimal material and structural complexity, avoiding the need for bulky or complex mechanisms.
Solution Approach 2:
The anti-twisting function is merged with the fastening function in a single integrated clasp component. The receptacle is formed as part of the clasp structure itself, combining multiple functions (fastening, anti-twisting, and elastic retention) into one element rather than requiring separate components.
Data Source
AI summary
The invention relates to a fastening arrangement including a profiled strut and a plug-in nut mounted in an aperture of the profile strut, wherein the plug-in nut has a threaded nut held on a clasp, wherein the clasp has a first and a second actuating end, via which the plug-in nut projects out of the aperture, wherein in a locking position of the actuating ends relative to each other an edge of the aperture is received in a receptacle of the clasp. Additionally, a corresponding switch cabinet housing is disclosed.