Yarn Winder Fulcrum Guide Force Reduction
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Solution Overview
Problem
Existing yarn winders with fixed fulcrum guides experience significant wear due to high forces exerted by tensioned yarns during threading, leading to potential damage and reduced durability of the bearing structure.
Innovation Solution
Incorporating a yarn deposit guide positioned to satisfy the inequality θ1 < θ2, where θ1 is the bending angle when the yarn is deposited on the guide and θ2 is the virtual bending angle without deposition, to reduce the force exerted on the fulcrum guide, along with an optional preventer to prevent yarn contact with the fulcrum guide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the yarn is sucked and held by the sucking holding member for threading, then the yarn can be positioned and guided, but the tension of the yarn becomes high causing significant bending and strong pressing onto the fulcrum guide
Solution Approach 1:
The patent introduces an intermediary component (yarn deposit guide or preventer) between the sucking holding member and the fulcrum guide. This intermediary receives the tensioned yarn from the sucking holding member and guides it to contact the fulcrum guide at a position that minimizes bending angle, thereby mediating the force transmission and reducing the pressing force on the fulcrum guide.
Solution Approach 2:
The patent employs preliminary action by providing a yarn deposit guide that receives and temporarily holds the yarn before it contacts the fulcrum guide. This preliminary positioning allows the yarn to be fed to the fulcrum guide in a controlled manner with reduced bending, preventing excessive force before the actual threading occurs.
2Stability of the object's composition
If fixed fulcrum guides are used, then the structure is simple and stable, but the fulcrum guides tend to be worn due to strong pressing from tensioned yarns
Solution Approach 1:
The patent introduces an intermediary component (yarn deposit guide or preventer) between the sucking holding member and the fulcrum guide. This intermediary receives the tensioned yarn from the sucking holding member and guides it to contact the fulcrum guide at a position that minimizes bending angle, thereby mediating the force transmission and reducing the pressing force on the fulcrum guide.
3Loss of time
If the yarn is directly threaded to the fulcrum guide, then the threading process is short, but the bending angle is large causing significant force exertion
Solution Approach 1:
The patent introduces an intermediary component (yarn deposit guide or preventer) between the sucking holding member and the fulcrum guide. This intermediary receives the tensioned yarn from the sucking holding member and guides it to contact the fulcrum guide at a position that minimizes bending angle, thereby mediating the force transmission and reducing the pressing force on the fulcrum guide.
Data Source
Figure 1
Figure 2(a)~2(b)
Figure 3
AI summary
Exertion of a large force from a yarn to a fulcrum guide at the time of yarn threading is prevented. A yarn winder 10 includes a second guide unit 15b having a cylindrical fulcrum guide 16 and a yarn deposit guide 31 on which a yarn Y to be threaded to the fulcrum guide 16 is deposited while not making contact with the fulcrum guide 16, when the yarn Y sucked and held by a suction gun 60 is threaded to the fulcrum guide 16.