Textile Drafting Carrier Pivot Adjustment
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Solution Overview
Problem
Existing drafting systems for textile machines face difficulties in accessing and adjusting fastening and adjusting screws, leading to increased effort and potential deformation of the support rod, requiring re-adjustment of roller pairs after height adjustments.
Innovation Solution
The adjustment element is positioned on the top side of the support, allowing for easy accessibility during operation, utilizing a lever arrangement or screw mechanism to adjust the carrier's angular position without changing the bearing axis, and incorporating a compression spring or self-locking snap nut for secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the adjusting screw and fastening screw are arranged on the side of the support facing away from the carrier (on the machine frame side), then the structural compactness is improved, but the ease of operation deteriorates because the screws become difficult to access and require removal of a cover strip for readjustment
Solution Approach 1:
The adjustment element is inverted from its conventional position on the machine frame side to the top side of the support, making it accessible from above during operation. This inversion resolves the accessibility problem while maintaining structural compactness through the lever arrangement that transmits adjustment motion internally.
2Strength
If the fastening screw is used to secure the support to the holding rod, then the fastening function is achieved, but the support rod undergoes deformation due to the fastening screw
Solution Approach 1:
The fastening function is extracted from the screw mechanism and implemented through form-fit recesses that engage with the holding rod. This eliminates the need for a fastening screw that would deform the support rod, while the adjustment element serves only its adjustment purpose without fastening function.
3Adaptability or versatility
If the height of the drafting system is adjusted by moving the bearing axis position, then the height adjustability is achieved, but the spatial position of the roller pairs changes requiring re-adjustment
Solution Approach 1:
The adjustment function is segmented from the bearing axis position. The adjustment element controls only the angular position of the carrier through the lever arrangement, while the bearing axis remains fixed in space. This segmentation allows height adjustment without disrupting roller pair alignment.
4Ease of operation
If the adjustment element is made accessible from the top side of the support, then the ease of operation is improved for readjustment during operation, but the device complexity increases due to the lever arrangement
Solution Approach 1:
The lever arrangement serves multiple functions: it transmits the adjustment motion from the top-accessible adjustment element to the carrier, maintains the bearing axis position fixed, and enables angular adjustment without affecting roller pair alignment. This multi-functionality justifies the added complexity by resolving multiple contradictions simultaneously.
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 design simplifies the readjustment process, maintains the spatial position of rollers, and allows for height adjustment during operation without re-adjusting roller pairs, reducing effort and preventing unintentional screw turning.
Implementation Method 1
A compression spring can advantageously be arranged on the screw shank. The preferably conical shape of the compression spring enables self-centering installation in the support without additional components that fix the position of the compression spring.
Implementation Method 2
The adjustment element is designed as a screw 5. The screw 5 is in operative connection with the carrier 2 and the operating lever 4 via a lever arrangement 16 arranged in the support 1.
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a drawing system for a textile machine, comprising a carrier (2) that is configured to hold top rollers and that is mounted to pivot about a bearing axis (3) on a support (1). Said support (1) is fixed to a retaining bar (6) of the textile machine. The system is also equipped with an adjusting element (5, 11), which is used to displace the carrier (2) in relation to the retaining bar (6). The invention is characterised in that the adjusting element (5, 11) is mounted on the support (1) in such a way that it causes the position of the carrier to be modified in relation to the retaining bar (6), by altering the pivoting angle of said carrier (2), whilst the spatial position of the bearing axis (3) remains unchanged.