Doubling-Up Fitting with Rotational Spreading for Tool-Free Anchoring
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Solution Overview
Problem
Existing doubling-up fittings require the use of an impact tool to anchor the fitting housing in a blind bore, making installation cumbersome and inefficient.
Innovation Solution
A doubling-up fitting with a clamp element, spreading disc, and adjusting disc that allows for manual insertion and anchoring without tools, enabling two-dimensional adjustment and fixation of plates by rotating the spreading disc to spread the clamping arms radially outward.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the fitting housing is tapped into the blind bore using an impact tool, then the fitting is firmly anchored in the blind bore, but the installation process becomes cumbersome and requires additional tools
Solution Approach 1:
The clamp element is divided into a clamp base and multiple clamp arms that can be independently positioned. The spreading disc separates the clamping function into radial spreading motion, allowing the fitting to be anchored through manual rotation rather than impact tool requirement
Solution Approach 2:
The clamp arms are designed to be dynamically adjustable through rotation of the spreading disc. The clamp arms can be spread radially outward to engage with the blind bore wall, transforming the static anchoring process into a dynamic, tool-free installation process
2Reliability
If the clamp arms are spread radially outward to anchor the fitting, then the fitting is securely fixed in the blind bore, but the insertion process becomes more complex
Solution Approach 1:
The adjusting disc is nested within the spreading disc, and both are integrated into the clamp element structure. This nested arrangement allows multiple functions (spreading and adjusting) to be combined in a compact configuration, reducing overall device complexity while maintaining secure fixation
Solution Approach 2:
The clamp arms are designed to automatically engage with the blind bore wall when the spreading disc is rotated. The radial spreading action causes the clamp arms to self-anchor into the bore wall without requiring additional anchoring mechanisms or complex insertion procedures
3Force
If the free clamp ends are deflected radially outward by outer contour portions, then the clamping force is increased, but the structural complexity of the clamp arms increases
Solution Approach 1:
The outer contour portions of the spreading disc are designed with curved surfaces that deflect the clamp arms radially outward. This curved geometry transforms rotational motion into radial spreading force, increasing clamping force while maintaining a simple, elegant clamp arm structure without additional mechanical components
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 easy, tool-free installation and secure fixation of doubled-up plates with two-dimensional adjustment, enhancing installation efficiency and reliability.
Implementation Method 1
The free clamp ends have at least one radially outwardly extending protrusion which can press or cut into a bore wall
Implementation Method 2
an adjusting disc arranged in the recess of the spreading disc and having a thread
Data Source
AI summary
A doubling-up fitting includes a clamp element with a clamp base and at least two clamp arms rising from the clamp base at its ends. The free clamp ends are angled inward and extend over the clamp base. A rotatably mounted spreading disc is arranged between the clamp base and the free clamp ends. A disc opening leads into a recess in the spreading disc where the diameter is greater than the disc opening diameter. A plurality of outer contour portions spread the free clamp ends radially outward less far in an initial rotational position of the spreading disc than in a final rotational position. An adjusting disc arranged in the recess of the spreading disc has a thread. The outer diameter of the adjusting disc is smaller than the diameter of the recess in the spreading disc and larger than the opening diameter of the disc opening.