Removable Piezoelectric Actuator for Jacquard Thread-Guide Bars
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Solution Overview
Problem
Current piezoelectric actuators for jacquard thread-guide bars in textile machines are costly to replace due to the need for entire modules, require complex maintenance, and result in significant downtime, as manufacturing tolerances lead to misalignment issues and the inability to repair individual faulty actuators without damaging the module.
Innovation Solution
A piezoelectric actuator design with individually removable and interchangeable mounting bodies, a blocking element for precise positioning, and a connection device that allows for easy replacement of faulty actuators, reducing the need for spare modules and simplifying maintenance by enabling non-specialized personnel to perform replacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If piezoelectric actuators are integrated into modules with multiple actuators (e.g., 16 actuators per module), then the structural integrity and alignment are improved, but the cost and complexity of replacement increase significantly
Solution Approach 1:
The patent divides the jacquard bar into modular sections, where each module contains a specific number of thread guides (e.g., 16) with their associated piezoelectric actuators. Each module is designed as an independent replaceable unit with standardized interfaces, allowing the bar to be segmented into interchangeable segments that can be individually replaced without affecting the entire bar structure.
Solution Approach 2:
The patent extracts the piezoelectric actuators from their original integrated positions and relocates them to standardized mounting bodies that can be independently removed and replaced. This extraction allows faulty actuators to be taken out and replaced individually or in small groups rather than requiring replacement of entire large modules or the whole bar.
2Reliability
If entire modules are replaced when a single actuator fails, then the reliability of the system is maintained, but the downtime and production loss increase
Solution Approach 1:
The patent segments the actuator array into independently replaceable units mounted on standardized bodies. When a piezoelectric actuator fails, only the specific actuator or a small module containing it needs to be replaced, rather than the entire jacquard bar or large module assemblies. This segmentation enables rapid replacement of individual faulty components while maintaining the rest of the system operational.
Solution Approach 2:
The patent implements preliminary preparation by providing standardized mounting bodies and interfaces that allow pre-assembled actuator units to be quickly swapped in and out. The standardized interfaces enable maintenance personnel to have replacement actuators or modules ready in advance, and to perform rapid exchange operations without complex alignment or calibration procedures during the replacement process.
3Manufacturing precision
If specialized personnel and complex procedures are required for actuator replacement, then the precision of installation is ensured, but the maintenance cost and operational complexity increase
Solution Approach 1:
The patent divides the replacement task into standardized, self-contained modules with built-in alignment features. Each mounting body is designed as a discrete unit with standardized interfaces that guide proper positioning and orientation. This segmentation transforms a complex precision task into a series of simple, repeatable assembly operations that can be performed by non-specialized personnel using basic tools.
Solution Approach 2:
The patent introduces standardized mounting bodies as intermediary components between the jacquard bar structure and the piezoelectric actuators. These mounting bodies serve as mediators that provide built-in alignment references, positioning features, and mechanical interfaces. They simplify the replacement process by eliminating the need for complex alignment procedures and specialized installation techniques, allowing straightforward attachment and detachment operations.
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 solution reduces downtime, maintenance costs, and spare stock requirements, allowing for rapid and cost-effective replacement of faulty actuators while ensuring accurate and continuous operation of the textile machine.
Implementation Method 1
a piezoelectric actuator for jacquard thread-guide bars of textile machines... comprising a piezoelectric body (8)... selective shift of the thread-guide bars involves an individual shift of the thread between two adjacent needle
Data Source
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AI summary
A piezoelectric actuator for jacquard thread-guide bars for warp-knitting textile machines, comprising a mounting body (6) singularly dedicated to the piezoelectric actuator (3) and onto which one piezoelectric body (8) is mounted, said piezoelectric body (8), a plurality of interface electric contacts (9) operatively connected to the piezoelectric body (8), and a connecting portion (10) apt to interface with a thread-guide portion, the mounting body (6) being configured and predisposed for being able to be removably engaged into a housing seat (5) of a supporting body (7) of a jacquard bar and to carry out an individual and removable mounting of the actuator onto the supporting body (7).