Spindle Clamping Device with Wave-Shaped Contours
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Solution Overview
Problem
Existing clamping devices for spinning machines are inefficient in residue-free winding, as they require manual actuation and do not automatically adjust to spindle speed, leading to incomplete winding and contamination risks.
Innovation Solution
A clamping device with an underwinding sleeve featuring an annular groove and distributed webs, which guides the displaceable clamping element, allowing for automatic opening and closing based on spindle speed, ensuring residue-free winding by clamping the thread like a chord and preventing fiber or dirt entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clamping device uses surface pressure to clamp the thread, then the clamping effect is insufficient when the spindle shaft is wound less than 360°, but increasing the spring force would cause the clamping gap to close prematurely and prevent complete unwinding
Solution Approach 1:
The patent applies a wave-shaped contour to the clamping surfaces of both the clamping element and the collar. This curved geometric profile enables automatic opening and closing of the clamping device through relative rotational movement, eliminating the need for manual actuation while ensuring complete thread removal. The wave-shaped contours transform rotational motion into axial displacement, allowing the clamping gap to open fully for residue-free winding.
2Ease of operation
If the clamping device requires manual actuation to open, then the operation is simple, but the productivity decreases due to time-consuming manual intervention for each winding removal
Solution Approach 1:
The patent implements a self-actuating mechanism where the clamping device automatically opens and closes based on the relative rotational speed between the clamping element and the collar. The wave-shaped contours on both components create automatic engagement and disengagement without requiring external actuation. This self-service mechanism eliminates manual intervention entirely, significantly improving productivity while maintaining operational simplicity.
3Manufacturing precision
If the clamping gap is kept open for residue-free winding, then the winding quality improves, but contamination risks increase due to exposed clamping surfaces
Solution Approach 1:
The patent employs a dynamic clamping mechanism where the clamping gap automatically opens during high-speed spinning to enable residue-free winding and closes during low-speed operations to protect the clamping surfaces from contamination. The wave-shaped contours ensure the gap opens completely when the spindle rotates at spinning speed, allowing threads to be thrown off without residue, and closes when the spindle is stationary or moving slowly to prevent fiber and dirt accumulation on the clamping surfaces.
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 reliable, residue-free underwinding by automatically adjusting to spindle speed, reducing manual intervention and contamination risks, while maintaining consistent clamping effectiveness across the clamping gap.
Implementation Method 1
comprising a fixed clamping element and an axially displaceable clamping element which can be pressed against the fixed clamping element by spring force
Implementation Method 2
which makes it possible to wind it under almost completely without residue
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The clamping device (1) has circular projections directed towards a clamping gap at clamping elements (3,4) and is arranged on an upper section of spindle. The circular projections are rounded off in a cross section and are formed coaxially to a longitudinal axis of the spindle. USE : Clamping device, particularly a cylindrical clamping device, for a thread at a spindle of a spinning or twisting frame. ADVANTAGE : The circular projections are rounded off in a cross section and are formed coaxially to a longitudinal axis of the spindle, and hence ensure a rust free clamping device with easy clamping effect that is independent in a clamping gap. DESCRIPTION OF DRAWINGS : The drawing shows a sectional view of a clamping device in a closed position. 1 : Clamping device 3,4 : Clamping elements 5 : Ball 6 : Slotted link 7 : Spiral spring.