Thread Delivery Device Axially Elastic Centering Unit
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Solution Overview
Problem
Existing thread delivery devices for textile machines face challenges in easily adjusting the braking force and centering of the brake body, making it complex to replace worn-out parts and ensuring consistent centering.
Innovation Solution
A thread delivery device with a braking device featuring a conical brake body and an axially elastic centering unit, comprising outer and inner carriers and elongated spring elements that can be adjusted in length and number to control both axial and radial elasticity, allowing for simple assembly and replacement of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the brake body is supported by multiple spring elements attached individually to the carrier ring and brake body, then the centering function is achieved, but the complexity of replacing wear parts increases
Solution Approach 1:
The patent combines multiple spring elements (first, second, and third spring elements) into a single integrated centering unit that is attached as one component to the carrier ring. This merging allows the entire centering unit to be replaced as a single assembly, significantly simplifying maintenance while maintaining the centering function through the coordinated action of all spring elements.
Solution Approach 2:
The centering unit is designed as a separable component that can be detached from the carrier ring as a complete assembly. This segmentation allows the centering unit (containing all spring elements) to be removed and replaced without disturbing other brake components, facilitating easy maintenance while preserving the reliable centering function.
2Manufacturing precision
If the spring elements are distributed evenly around the circumference to ensure centering, then the centering precision is improved, but the device complexity increases
Solution Approach 1:
Multiple spring elements are combined into a single integrated centering unit with a unified attachment mechanism to the carrier ring. This merging simplifies the device structure by eliminating the need for separate attachment mechanisms for each spring element, while the even circumferential distribution of the spring elements maintains high centering precision.
3Adaptability or versatility
If the brake body is made adjustable in axial position for tension control, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The brake body is designed with dynamic adjustability through the centering unit that allows axial movement. The spring elements provide elastic compliance that enables the brake body to be positioned at different axial locations along the storage body, allowing adjustment of the braking force while maintaining centering through the elastic support.
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 easy adjustment of braking force and centering, ensuring reliable thread tension adjustment and simplified maintenance by allowing for flexible assembly and replacement of centering elements, enhancing the device's operational efficiency and longevity.
Implementation Method 1
The elastic means are preferably formed by a set of three springs arranged offset from each other by 120°
Data Source
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AI summary
A yarn delivery device (1) according to the invention for supplying a yarn (40) to a textile machine is provided with a storage body (3) from which the yarn (40) is drawn by the textile machine, and with a braking device for adjusting the yarn tension of the yarn (40), which is arranged in the yarn path downstream of the storage body (3). The braking device comprises a braking element (8) and an adjusting device for the braking element (8), wherein the braking element (8) can be pressed against a clamping surface (10) at the draw-off end of the storage body (3). The braking device includes an axially elastic centering unit, wherein the centering unit extends perpendicularly, cylindrically, or conically to the axis of the storage body (3) and is arranged between the braking element (8) and the adjusting device. The centering unit has at least one outer support, one inner support, and a set of at least three spring elements (13).The spring elements (13) are arranged on the outer and inner supports, with one support being located on at least one actuating element of the adjusting device and the other support being located on the brake body (8). The spring elements (13) are designed as elongated, curved profiles and extend spirally from one support to the other, with each connection point (15) of the spring element to one support being arranged with a radial angular offset (V) to its connection point (16) to the other support.