Quick Fastener With Constructive Rotation Protection
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Solution Overview
Problem
Existing quick fasteners fail to provide a reliable connection between components due to insufficient resistance against vibrations and oscillations, leading to time-intensive maintenance work.
Innovation Solution
A quick fastener system comprising a fastening bolt with a radial outer fastening thread, a compressible pretension element with a pretension thread, and a hollow cylindrical thread element, which provides constructive rotation protection and a releasable lock to ensure a secure and stable connection between components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a turn-lock fastener with spring pretension is used to connect components, then the components can be connected together, but the connection fails under vibrations and oscillations leading to maintenance issues
Solution Approach 1:
The fastening system uses a dynamic locking mechanism where the locking element can rotate and engage/disengage from locking positions. The spring element provides dynamic pretension that adapts to vibration loads, maintaining reliable connection under oscillating conditions unlike static friction-based solutions.
Solution Approach 2:
A dedicated locking element acts as an intermediary between the fastening bolt and the components. This locking element with its locking protrusion and locking groove provides a positive mechanical lock that prevents vibration-induced loosening, mediating the connection forces between the bolt and components.
2Productivity
If a quick fastener with snap-in connection is used to connect components, then the connection is established quickly, but the connection is not reliable enough to resist vibrations and oscillations
Solution Approach 1:
The fastening system combines quick snap-in engagement with subsequent dynamic locking. The initial snap-in connection provides rapid assembly, while the rotatable locking element with spring pretension provides ongoing vibration resistance, achieving both speed and reliability.
Solution Approach 2:
The locking element is pre-positioned on the fastening bolt before connection. During the quick snap-in operation, the locking element is already in place to immediately engage with the locking groove, providing instant vibration protection without requiring additional steps.
3Ease of operation
If a self-cutting thread with frictional engagement is used to retain rotational connection, then the components can be connected, but the forces are insufficient to resist vibrations and oscillations
Solution Approach 1:
The locking element serves as a mechanical intermediary that transforms the simple rotational connection into a positively locked connection. The locking protrusion and groove create a form-fit connection that provides high retention force against vibrations while maintaining ease of operation through simple rotation.
Solution Approach 2:
The system changes the retention mechanism from friction-based (self-cutting thread) to geometry-based (locking protrusion and groove). This parameter change from relying on friction forces to relying on mechanical interlocking provides significantly higher retention force while maintaining operational simplicity.
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 solution ensures a reliable and permanent connection between components, resisting vibrations and environmental influences, while preventing over-tightening and ensuring easy release, thus reducing maintenance time and improving connection stability.
Implementation Method 1
a compressible pretension element (3) which is fastenable at the first component (A) and which comprises a pretension thread (28) at a radial inner side
Implementation Method 2
a fastening bolt (10) having a radial outer fastening thread (12) of a first spiral direction which is fastenable at the second component (B)
Implementation Method 3
at least a constructive rotation protection is provided between the hollow cylindrical thread element (60) and the compressible pretension element (3)
Data Source
AI summary
A quick fastener by means of which at least a first and a second component are connectable to each other. The quick fastener includes a fastening bolt having a fastening thread of a first spiral direction, which is fastenable at the second component, and a compressible pretension element which is fastenable at the first component. The compressible pretension element includes a pretension thread at a radial inner side having a second spiral direction opposite to the first spiral direction, a hollow cylindrical thread element which is screwable with an outer thread at a radial outer side into the pretension thread of the pretension element having an inner thread at its radial inner side into which the fastening thread of the fastening bolt is screwable. At least a constructive rotation protection is provided between the hollow cylindrical thread element and the compressible pretension element. A production method for the quick fastener is further provided.