Sewing Machine Independent Drives for Stable Feeding Mode Switching
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Solution Overview
Problem
Existing sewing machines face difficulties in easily switching between feeding specifications, particularly when a sewing needle is withdrawn from or inserted into a sewing object, especially when multiple objects overlap, leading to complex recombination tasks.
Innovation Solution
A sewing machine design with independent control of a belt drive part and a needle drive part, allowing for easy switching between belt feed and needle feed modes, where the belt drive part operates the feed belts independently of the needle drive part, and the control part coordinates their operations to synchronize or decouple their movements based on the sewing needle's position relative to the sewing object.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sewing machine uses a unified drive mechanism for both feed belts and needle, then the structure is simple, but switching between feeding specifications becomes difficult and requires extensive recombination
Solution Approach 1:
The drive mechanism is segmented into two independent parts: a belt drive part for controlling feed belts and a needle drive part for controlling the sewing needle. This segmentation allows each part to be controlled independently, enabling easy switching between different feeding specifications without requiring extensive recombination of the entire drive mechanism.
2Adaptability or versatility
If the feed belts and needle are controlled independently, then switching between feeding specifications becomes easy, but the device complexity increases
Solution Approach 1:
The system dynamically adjusts the operational relationship between the belt drive part and needle drive part based on the selected feeding specification. The control part enables these two drive parts to operate independently when needed, providing dynamic adaptability while maintaining a relatively simple overall structure through standardized independent modules.
3Reliability
If the sewing needle remains inserted in the sewing object during feeding, then the sewing object can be fed together with the needle to prevent shifting, but this limits the ability to withdraw the needle for other operations
Solution Approach 1:
The independent control of the needle drive part allows the system to dynamically adjust the needle's position and timing relative to the feed belts. This enables the needle to be inserted with the sewing object when positioning stability is needed, or withdrawn before feeding when other operations are required, providing operational flexibility while maintaining reliability.
4Manufacturing precision
If extensive recombination is required to switch feeding specifications, then the device can be precisely configured for each mode, but the time and complexity of switching increases
Solution Approach 1:
The independent drive parts are pre-configured with standardized control interfaces and operational modes. The control part stores and manages different feeding specification settings, allowing operators to switch between modes by selecting pre-configured parameters rather than performing extensive recombination, thus reducing switching time while maintaining configuration precision.
Data Source
AI summary
A sewing machine includes: a sewing needle; a shuttle, cooperating with the sewing needle to form a seam; a pressing member, pressing a sewing object disposed at a sewing position immediately below the sewing needle; a feed mechanism, in which endless feed belts feeding the sewing object disposed at the sewing position from the sewing position along a first direction are disposed on two sides with respect to the sewing position in a second direction orthogonal to the first direction, and in which a belt drive part is provided; a needle drive part, provided separately from the belt drive part, and moving the sewing needle in the first direction; and a control part, exerting control so that the belt drive part and the needle drive part operate independently.