Bobbin Holder Core Support Structure for High-Speed Vibration Control
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Solution Overview
Problem
The increased number of bobbins and winding speed in bobbin holders lead to excessive vibration due to unsupported longer rotary shafts, causing deformation and antinodal vibrations, which conventional configurations fail to adequately address.
Innovation Solution
A bobbin holder design that includes a core member supported at intermediate points by an intermediate supporter, with O-rings and a retaining structure, to stabilize the core member and reduce vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of bobbins is increased or the winding speed is increased, then the productivity is improved, but the vibration of the bobbin holder becomes excessive
Solution Approach 1:
The rotary shaft is divided into multiple supported sections by adding intermediate supporters at radial inner positions. This segments the previously continuous unsupported portion into smaller sections, reducing the overall vibration while maintaining the ability to hold multiple bobbins at high speed
2Quantity of substance
If a longer rotary shaft is used to hold more bobbins, then the quantity of bobbins is improved, but the unsupported portion becomes longer causing deformation
Solution Approach 1:
The rotary shaft structure is segmented into multiple supported sections by positioning intermediate supporters at radial inner positions along the shaft length. This creates multiple shorter supported spans instead of one long unsupported span, preventing deformation while accommodating more bobbins
Solution Approach 2:
Support is added in the radial direction by positioning intermediate supporters at radial inner positions relative to the rotary shaft axis. This dimensional approach provides support without extending the axial length of the shaft, allowing more bobbins to be held without increasing shaft length
3Quantity of substance
If the rotary shaft is made longer to increase bobbin capacity, then the number of bobbins is improved, but excessive vibration with antinodes occurs
Solution Approach 1:
The rotary shaft is segmented into multiple supported sections by adding intermediate supporters, which breaks up the vibration modes and eliminates the formation of antinodes that would occur in a long continuous shaft
Solution Approach 2:
Intermediate supporters act as intermediary support elements between the rotary shaft and the holder body, providing additional support points that reduce vibration amplitude and prevent antinode formation in the shaft structure
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 design effectively suppresses excessive vibration by stabilizing the core member, ensuring robust operation even at higher speeds and longer lengths.
Implementation Method 1
The intermediate supporter includes a base member and O-rings. The O-rings are made of an elastomeric material and are attached to the base member. The viscoelastic deformation of the elastomeric member provides a dual stiffness system that reduces or eliminates excessive vibration.
Implementation Method 2
The intermediate supporter is arranged at a position which is radially inside the cylindrical portion, radially outside the core member, and between the first end portion and the second end portion so that the holder body supports the core member.
Data Source
Figure 1~2
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Figure 5~6
AI summary
A bobbin holder 41 includes a holder body 61, a core member 62, and an intermediate supporter 80. The holder body 61 includes a cylindrical portion 61c and holds a plurality of bobbins 91 for winding yarn aligned in an axial direction. The core member 62 is arranged inside the cylindrical portion 61c of the holder body 61 and a first end portion and a second end portion in an axial direction of the core member 62 is supported by the holder body 61. The intermediate supporter 80 is arranged at a position which is radially inside the cylindrical portion 61c, radially outside the core member 62, and between the first end portion and the second end portion so that the holder body 61 supports the core member 62.