Needle Mounting Device With Segmented Clamping For Punch Needle Stability
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Solution Overview
Problem
The existing needle mounting device for punch needles on a sewing machine experiences shifting during needle punching due to concentrated force on the needle bar, leading to potential misalignment.
Innovation Solution
A needle mounting device with an insertion portion, engaging mechanism, and affixing portion that securely mounts punch needles on the needle bar, utilizing an engaging lever and cam mechanism to stabilize the punch needles at multiple points, preventing shifting during operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single clamping member is used to mount the punch needle on the needle bar, then the device complexity is reduced, but the mounting security and stability deteriorate due to concentrated force causing shifting during needle punching
Solution Approach 1:
The mounting device is divided into multiple clamping members (first clamping member and second clamping member) that independently clamp different portions of the needle bar. This segmentation distributes the force during needle punching across multiple contact points, preventing shifting while maintaining a relatively simple overall structure.
Solution Approach 2:
Multiple clamping members are combined to work together on the same needle bar, creating a composite clamping system. The first clamping member clamps at one location while the second clamping member clamps at another location, and their combined action provides superior mounting security compared to a single clamping member.
2Device complexity
If the clamping members are positioned close together, then the device complexity is reduced, but the stability deteriorates because the force concentration causes shifting during operation
Solution Approach 1:
The clamping members are positioned at different locations along the needle bar to create non-uniform force distribution. The first clamping member is positioned at a first location and the second clamping member at a second location, creating localized clamping zones that together provide enhanced stability against shifting during needle punching.
3Reliability
If multiple clamping members are used to prevent shifting, then the mounting security is improved, but the device complexity increases due to additional components and assembly steps
Solution Approach 1:
The clamping members are designed with movable characteristics, allowing them to be adjusted and positioned independently on the needle bar. This dynamic capability enables the system to adapt to different mounting requirements while maintaining a relatively simple component structure, avoiding the need for overly complex fixed mechanisms.
Data Source
AI summary
A needle mounting device mounts a punch needle for needle punching on a needle bar of a sewing machine. The needle mounting device includes an insertion portion, an engaging mechanism, and an affixing portion. The insertion portion has a bar shape and is configured to be inserted into a mounting portion provided in the needle bar for mounting a sewing needle. The engaging mechanism is able to engage with the needle bar at a different position from the insertion portion in an extension direction of the insertion portion. The affixing portion is configured to affix the punch needle.