Electronic Yarn Changing Device for Circular Knitting Machines
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Solution Overview
Problem
Conventional electronic yarn changing devices for circular knitting machines have complex structures due to the use of multiple pneumatic tanks and linking rod structures, which complicates the yarn feeding and clamping processes.
Innovation Solution
The electronic yarn changing device incorporates at least two driving units, impelling plates, and yarn feeding units, with each driving unit controlled by an electronic signal, allowing for simplified operation with fewer components, including a matrix arrangement of driving units and use of stepping motors to minimize thickness and enhance structural strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple pneumatic tanks and linking rod structures are used to control yarn feeding plates, then the yarn feeding function is achieved, but the device structure becomes complex
Solution Approach 1:
The patent combines multiple pneumatic tanks into a single integrated pneumatic tank structure. The first and second yarn feeding plates share a common pneumatic tank, eliminating the need for separate tanks and reducing structural complexity while maintaining independent control capability through separate control rods
Solution Approach 2:
The pneumatic tank is designed to serve multiple functions simultaneously - it controls both the first and second yarn feeding plates through different control rods, and can perform both yarn feeding and yarn withholding operations through a single unified structure rather than requiring separate mechanisms
2Ease of operation
If an additional independent pneumatic tank is used to control the mobile blade plate, then the yarn cutting function is achieved, but the overall structure cannot be simplified
Solution Approach 1:
The mobile blade plate is integrated with the second yarn feeding plate structure, sharing the same pneumatic tank and control mechanism. The control rod extends to simultaneously control both the yarn feeding plate and the mobile blade plate, eliminating the need for a separate independent pneumatic tank for cutting operations
3Stability of the object's composition
If linking rod structures are used to connect driving units, then coordinated motion is achieved, but the structure becomes complex
Solution Approach 1:
The patent removes the intermediate linking rod structures entirely. Each driving unit is directly connected to its corresponding yarn feeding plate through control rods, establishing direct drive relationships without requiring complex linking mechanisms to coordinate motion between components
Data Source
AI summary
An electronic yarn changing device for a circular knitting machine includes at least two driving units, at least two impelling plates respectively connected to the driving units, and at least two yarn feeding units. The impelling plates are impelled by the respective connected driving units to perform a one-dimensional motion. The yarn feeding units are arranged side by side, and are each provided sequentially with a yarn feeding plate, a yarn clamping plate, a mobile blade plate and a fixed blade plate. The yarn clamping plate includes a plurality of guide columns disposed correspondingly to the yarn feeding plate. The yarn feeding plates are respectively pushed by the corresponding impelling plates to perform a two-dimensional motion due to the plurality of guide columns. The mobile blade plates are also respectively pushed when the corresponding impelling plates perform the one-dimensional motion, and individually perform a one-dimensional motion once being pushed.