Quick Fastener with Clamping Blade for Profile Rail Mounting
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Solution Overview
Problem
Existing fastening systems for profile rails, such as those used in 19-inch rack systems, require cumbersome manual pretensioning of cage nuts, leading to potential slippage and difficulty in quick attachment or removal.
Innovation Solution
A fastening system with a body featuring spaced internal threads aligned with rail openings, a clamping blade for frictional attachment, and optional force-fit elements, allowing for easy positioning and removal of the quick fastener along the rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cage nuts are used to mount equipment in 19-inch rack systems, then the mounting rail can be equipped with internal threads, but the cage nuts require cumbersome manual pretensioning and may slip out of alignment
Solution Approach 1:
The patent replaces the traditional mechanical cage nut system with a plastic fastening element that integrates the nut function directly into a molded body. This substitution eliminates the need for manual pretensioning and alignment adjustments, as the plastic fastener is designed to snap into the profile rail opening and securely hold the threaded insert in place through its integrated clamping mechanism.
Solution Approach 2:
The patent merges the cage nut, mounting bracket, and threaded insert into a single integrated plastic fastening element. This consolidation eliminates the need for separate cage nuts and mounting rails with square holes, simplifying the overall system while maintaining the ability to provide secure threaded mounting points on profile rails.
2Reliability
If cage nuts are used for mounting, then internal threads can be provided on profile rails, but removing the cage nuts requires considerable effort
Solution Approach 1:
The patent employs a dynamic fastening system where the plastic fastening element can be quickly inserted and removed from the profile rail. The integrated clamping mechanism provides secure holding during operation but allows for easy release when needed, enabling rapid reconfiguration of mounting positions without the considerable effort required to remove traditional cage nuts.
3Adaptability or versatility
If multiple internal threads are provided on the mounting rail, then equipment can be mounted at different positions, but the positioning precision must be maintained
Solution Approach 1:
The patent segments the mounting system into multiple discrete plastic fastening elements that can be independently positioned at different locations along the profile rail. Each fastening element contains precisely formed internal threads that align with the rail openings, providing flexible positioning while maintaining manufacturing precision through the molded geometry of the fasteners themselves rather than relying on the rail's hole precision.
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 and secure attachment of profile rails with internal threads at desired positions, facilitating easy installation and removal without manual pretensioning, while maintaining precise alignment and electrical contact.
Implementation Method 1
holds the body frictionally on the profile rail
Implementation Method 2
The spring element serves to attach the clamping plate to the body elastically
Data Source
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AI summary
A fastening system for assembling appliances, in particular electrical appliances, comprising at least one profile rail (50) provided with openings (52, 54, 56) and comprising at least one quick-fastener (10) which has a body (12) in which at least one internal thread (12.1, 12.2,...) is formed, is characterized in that the body (12) has over its length (L) at least two spaced-apart internal threads (12.1, 12.2), wherein, in an exact position of the quick-fastener (10) relative to the profile rail (50), each of the internal threads (12.1, 12.2) is brought into alignment with one of the openings (e.g. 52, 56) of the profile rail (50), and in that a clamping blade (14) having the same length L as the body (12) is attached to the body (12), which clamping blade forms between it and the body (12) a gap (13) for receiving the profile side and holds the body (12) against the profile rail (50) by friction.