Open-End Spinning Thread Guide Lever with Independent Drive
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Solution Overview
Problem
Existing service units for open-end spinning machines face issues with securely attaching new spun threads to empty tubes, leading to problems with thread reserve winding placement and usability.
Innovation Solution
A service unit with a thread laying device equipped with a second, separately controllable drive for the thread guide and deflection lever, allowing it to be positioned inclined, ensuring the thread is guided back onto the empty bobbin, and a spring element for automatic reset to the winding position, ensuring proper thread reserve winding on the tube foot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the new thread is clamped between the tube plate and the end face of the empty tube, then the thread attachment is simplified, but the thread reserve winding may be accidentally wound next to the empty tube and become unusable
Solution Approach 1:
A second drive mechanism is introduced as an intermediary control system for the thread guide and deflection lever. This separate drive allows independent control of the lever's position to ensure the thread reserve winding is properly guided away from the empty tube area, preventing accidental winding while maintaining the simplified clamping attachment method.
Solution Approach 2:
The thread guide and deflection lever is made dynamically controllable through the second drive, allowing it to be positioned in different locations during operation. This dynamic adjustment enables the lever to actively prevent the thread reserve winding from being wound next to the empty tube, transforming a static potential defect into a controllable process parameter.
2Manufacturing precision
If the thread guide and deflection lever is positioned in the inclined position, then the spun thread is guided back onto the empty bobbin, but the device complexity increases due to the second drive
Solution Approach 1:
The drive mechanism is segmented into two independent drives: the first drive for the thread laying device and the second drive specifically for the thread guide and deflection lever. This segmentation allows the second drive to be optimized solely for controlling the lever's inclined position, improving thread placement precision while keeping the overall system modular and manageable.
Solution Approach 2:
The second drive enables dynamic change of the thread guide and deflection lever's positional parameter (inclined position), allowing the system to adjust the lever's location to optimize thread reserve winding placement. This parameter adjustment capability improves manufacturing precision without requiring a completely different mechanical design.
3Ease of operation
If the spring element is used for automatic reset, then the operation is simplified, but the control precision may be reduced
Solution Approach 1:
The spring element provides self-service automatic reset functionality for the thread guide and deflection lever. After the lever is positioned in the inclined location to guide the thread, the spring automatically returns it to the winding position without manual intervention, simplifying operation while the second drive maintains precise control when needed.
Solution Approach 2:
The spring element creates a periodic action cycle where the lever is manually positioned in the inclined location, performs the thread guiding function, then automatically resets to the winding position. This periodic operation simplifies the control process while the second drive ensures precise positioning during the critical thread guidance phase.
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 the thread reserve winding is securely positioned and accessible, preventing accidental winding next to the empty tube and maintaining usability during the winding and transport processes.
Implementation Method 1
a spring element (24) which acts on the thread guide and deflection lever (34) in such a way that the thread guide and deflection lever (34) is automatically reset from the inclined position to the winding position
Data Source
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AI summary
The service device (16) has an auxiliary thread feeding device (21) for providing an auxiliary thread, where a thread laying device (23) is provided for creating a new thread. The thread laying device has one separately controlled drive for a thread-guiding and deflection lever (34).