Winding Device Pivot Lever Abutment Force Control
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Solution Overview
Problem
Existing winding devices require complex construction and drive technology to maintain constant abutment forces during the winding process, which increases manufacturing costs and complexity.
Innovation Solution
A simplified winding device design that uses a pivot lever with a linear drive and a force measurement device to regulate the abutment force between the bobbin tube and the support roller, allowing for precise control of the winding process without the need for complex mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex construction and drive technology are used to maintain constant abutment forces during winding, then the abutment force control quality is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent introduces a counterweight element that compensates for the increasing weight of the bobbin during winding. The counterweight is positioned to create a balancing moment that offsets the increased abutment force, thereby maintaining relatively constant abutment force on the support roller without requiring complex active control systems
Solution Approach 2:
The patent employs a dynamic adjustment mechanism where the pivot lever can change its position during the winding process. By allowing the lever arm ratio to vary dynamically, the system automatically adapts to the changing bobbin weight, maintaining constant abutment force through geometric adjustment rather than complex drive control
2Quantity of substance
If the bobbin diameter increases during winding, then the winding capacity is improved, but the abutment force on the support roller increases excessively
Solution Approach 1:
The counterweight is specifically designed to compensate for the increasing bobbin weight as more thread is wound. By positioning the counterweight at an appropriate distance from the pivot point, it creates a balancing moment that offsets the increased downward force, keeping the abutment force on the support roller relatively constant throughout the winding process
Solution Approach 2:
The system allows the pivot lever to dynamically adjust its position as the bobbin fills. The changing lever arm ratio automatically compensates for the increasing bobbin weight, enabling the system to maintain constant abutment force while accommodating the full winding capacity from empty to full bobbin
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 enables a high-quality and uniform bobbin production with reduced manufacturing costs and complexity, while maintaining precise control over the winding process.
Implementation Method 1
The pivot lever is designed with two lever arms, wherein the winding mandrel for the bobbin tube is provided on a first lever arm and a linear drive for moving the pivot lever about the rotary axis is provided on a second lever arm
Implementation Method 2
A force measurement device is arranged between the axle bolt and the holder of the linear drive in the machine frame
Implementation Method 3
The friction roller also serves as a support roller. The friction roller can be designed as a so-called grooved drum
Data Source
AI summary
A winding device for winding a thread onto a bobbin tube to form a bobbin includes a machine frame, a controller, and a support roller rotatably mounted in the machine frame to support the bobbin tube or the bobbin. A winding mandrel holds the bobbin tube and is pivotally held on a pivot lever that is rotatably mounted on a rotary axis in the machine frame. The pivot lever includes a first and a second lever arm, wherein the winding mandrel is provided on the first lever arm. A linear drive is provided on the second lever arm to move the pivot lever about the rotary axis, wherein the linear drive is connected to the second lever arm via a push rod and an axle bolt and is pivotally attached to the machine frame via a holder. A force measurement device is arranged between the axle bolt and the holder.