Yarn Brake Magnetic Repulsion Adjustment Mechanism
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Solution Overview
Problem
Existing yarn feeding devices with yarn brakes that utilize mutually repelling permanent magnets face challenges in efficiently adjusting the braking force for precise control and quick maintenance, as current mechanisms are time-consuming and prone to incorrect adjustments during maintenance, cleaning, or replacement.
Innovation Solution
A combination of a screw device for gradual and precise adjustment of the braking force and a quick adjustment assembly that allows for rapid, one-handed operation over a large stroke, ensuring the braking body can be easily accessed and replaced without altering the previous setting, integrated within the support for compact and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a threaded spindle is used for gradual adjustment of the braking body position, then the braking effect can be precisely controlled, but the adjustment process becomes time-consuming during maintenance and replacement
Solution Approach 1:
The adjustment mechanism is segmented into two independent parts: a threaded spindle for gradual precise adjustment and a quick adjustment assembly with lever and slot for rapid positioning. This segmentation allows each component to specialize in one type of adjustment, resolving the contradiction between precision and speed.
Solution Approach 2:
The system dynamically switches between two adjustment modes depending on the operational context. The threaded spindle provides continuous fine-adjustment capability, while the quick adjustment assembly provides discrete rapid-positioning capability. This dynamic flexibility allows the system to optimize between precision and speed based on needs.
2Ease of repair
If the holder ring is adjusted far away for maintenance or replacement of the braking body, then the braking body can be removed, but the previously adjusted braking effect is lost and must be readjusted
Solution Approach 1:
The quick adjustment assembly pre-positions the braking body in a maintenance-friendly gap position relative to the storage body, creating optimal access conditions before replacement begins. This preliminary positioning action eliminates the need for extensive holder ring adjustment, allowing quick replacement while preserving the threaded spindle's braking effect settings.
Solution Approach 2:
The slot-guided lever assembly acts as an intermediary mechanism that temporarily decouples the braking body from its operational position without affecting the threaded spindle's adjustment. This intermediary system facilitates easy removal and reinstallation while maintaining the precision settings established by the threaded spindle.
3Ease of operation
If a quick adjustment assembly with large stroke is added for rapid positioning, then maintenance access is improved, but the device complexity increases
Solution Approach 1:
The quick adjustment assembly is merged with the existing holder ring and threaded spindle structure. The lever and slot mechanism integrates into the holder ring, sharing common components and mounting points. This merging approach adds quick-adjustment capability while minimizing the increase in overall device complexity.
Solution Approach 2:
The holder ring is designed with multi-functionality: it serves as both the mounting structure for the threaded spindle and the guide structure for the quick adjustment lever. This universal design allows one component to fulfill multiple roles, reducing the need for additional separate structures and thereby limiting complexity growth.
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
This combination enables comfortable and efficient adjustment of the braking effect, saving time and reducing the risk of incorrect settings, ensuring reliable operation and high user satisfaction by allowing precise control and quick access for maintenance and replacement tasks.
Implementation Method 1
The braking body is urged away from a support by mutually repelling permanent magnet arrangements
Implementation Method 2
The braking body is axially urged by a spring arrangement in the support
Data Source
Figure 1~5
Figure 2
Figure 3
AI summary
In a yarn feeding device F having a yarn brake B provided at a housing arm 2, the yarn brake B comprising a generally conical braking body 5 for axial resilient co-operation with a withdrawal end 3a of a stationary storage body 3 of the yarn feeding device and mutually repelling permanent magnet arrangements P1, P2 respectively provided at the braking body and a stationary support 6, as well as an adjustment assembly E for gradually varying the braking effect between the braking body 5 and the withdrawal end 3a, the adjustment assembly including a screw device 18a, 21, the relative axial position of the permanent magnet arrangement P2 of the support is variable selectively either gradually by the screw device 18a, 21 or in one stroke extending over several thread pitches of the screw device 18a, 21 by a quick adjustment assembly Q of the support 6. In the yarn brake B the adjustment assembly E and the quick adjustment assembly Q share components of the support 6. The quick adjustment assembly Q is operable manually in one axial stroke direction and automatically returns by spring force 30.