Spindle Nut Through-Channel Structure for Self-Cleaning Reed Adjustment
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Solution Overview
Problem
The reed arrangement in textile machines, particularly when handling cotton threads, faces issues with cotton dust settling on threaded spindles and nuts, leading to seizing and potential damage, and existing solutions like covers are ineffective in preventing deposition and require high cleaning efforts.
Innovation Solution
The spindle nut is designed with through-channels that facilitate self-cleaning by displacing dust and grease mixtures into these channels as the threaded spindle rotates, featuring intersecting angles for effective dirt scraping and positioned to allow easy removal, reducing the risk of damage and maintenance effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a cover is used for the threaded spindle to prevent dust deposition, then protection against contamination is improved, but the cover cannot reliably prevent cotton dust deposition because the spindle nut must move along the threaded spindle requiring the cover to be movable
Solution Approach 1:
The harmful dust and grease mixture is extracted from the threaded spindle surface through the through-channel in the spindle nut. The through-channel acts as an extraction path that removes the contaminant mixture from the critical threading interface, preventing accumulation and seizing.
Solution Approach 2:
The harmful dust-grease mixture that would normally cause seizing is converted into a removable substance that can be easily discharged through the through-channel. The continuous rotation of the threaded spindle actively transports the contaminant mixture into the through-channel for removal, turning the harmful accumulation process into a self-cleaning mechanism.
2Ease of operation
If the reed arrangement is dismantled for cleaning, then cleaning effectiveness is improved, but cleaning effort and damage risk are increased
Solution Approach 1:
The spindle nut performs self-cleaning through its own operational movement. As the threaded spindle rotates during normal operation, the spindle nut moves along the threads, and this movement automatically transports the dust-grease mixture into the through-channel for discharge. The system cleans itself during normal operation without requiring external intervention or dismantling.
Solution Approach 2:
The through-channel is pre-positioned and pre-configured during manufacturing to intercept and remove contaminant mixtures before they can accumulate to harmful levels. The continuous removal action prevents the buildup that would lead to seizing, eliminating the need for periodic dismantling and manual cleaning.
3Ease of operation
If the threaded spindle rotates to move the spindle nut, then adjustment function is improved, but dust and grease mixture accumulates on the threaded spindle causing seizing risk
Solution Approach 1:
The harmful dust and grease mixture is extracted from the threaded spindle surface through the through-channel in the spindle nut. The through-channel acts as an extraction path that removes the contaminant mixture from the critical threading interface, preventing accumulation and seizing.
Solution Approach 2:
The harmful dust-grease mixture that would normally cause seizing is converted into a removable substance that can be easily discharged through the through-channel. The continuous rotation of the threaded spindle actively transports the contaminant mixture into the through-channel for removal, turning the harmful accumulation process into a self-cleaning mechanism.
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 enables efficient removal of contaminants, minimizing the risk of spindle nut and threaded spindle damage, reducing cleaning effort, and eliminating the need for additional covers, thus maintaining the reed arrangement's integrity and operational efficiency.
Implementation Method 1
a tangent to the threaded hole and a tangent to the through-channel enclose an acute angle at a point where the threaded hole and the through-channel intersect. As the lead screw rotates relative to the lead screw nut, the peripheral surface of the lead screw passes a relatively sharp edge which facilitates scraping of dirt from the external threads of the lead screw.
Data Source
Figure 1~3
AI summary
A spindle nut (8) for a reed arrangement is specified, having a body (12) which has a threaded bore (13) with an internal thread (14). One would like to keep the risk of damage small, particularly when using the reed arrangement with cotton threads. For this purpose, it is provided that the body (12) has at least one through-channel (15, 16) which overlaps the threaded bore (13) in the radial direction and interrupts the internal thread (14).