Hog Ring Fastening Device Push Mechanism
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Solution Overview
Problem
Conventional C ring fastening devices often fail to reliably feed the top C ring of a C ring strip to the fastening position due to the feed member not pushing the strip in the correct direction after completing the feeding process.
Innovation Solution
The hog ring fastening device incorporates a push mechanism with torsion coil springs and swing members to ensure the hog ring strip is pushed in the feed direction after the feed mechanism has completed its operation, utilizing a combination of a main pneumatic cylinder, feed pneumatic cylinder, and torsion coil springs to effectively guide the top hog ring to the fastening position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the feed member completes feeding the C ring strip without pushing it further, then the feeding cycle is completed, but the top C ring cannot be reliably fed to the fastening position
Solution Approach 1:
The feed mechanism is divided into two independent parts: a feed member for feeding C rings and a push member for pushing the strip. This segmentation allows each component to perform its specific function effectively, ensuring the top C ring is reliably fed to the fastening position while maintaining manageable device complexity.
Solution Approach 2:
The push member is positioned to contact the C ring strip in advance before the feed member completes its feeding action. This preliminary positioning ensures that once the feed member releases the strip, the push member immediately pushes the strip forward to deliver the top C ring to the fastening position, preventing feeding failures.
2Reliability
If the feed member pushes the C ring strip after feeding, then the top C ring is reliably fed, but the device structure becomes more complex
Solution Approach 1:
The feed member and push member are combined within a single feed mechanism assembly, sharing common support structures and control systems. This merging approach allows the push function to be added without proportionally increasing overall device complexity, as both functions utilize shared components and space.
Solution Approach 2:
The push member is designed to serve multiple purposes: it pushes the C ring strip forward to deliver the top ring to the fastening position, and it also helps guide and align the strip during the feeding process. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity.
3Device complexity
If a simple feed mechanism is used, then the device complexity is low, but the top C ring is not reliably fed to the fastening position
Solution Approach 1:
The feed mechanism employs dynamic elements including a swingable push member that can pivot between retracted and extended positions, and a spring-loaded configuration that provides automatic resetting. This dynamic design allows the mechanism to perform the additional push function without requiring a completely complex rigid structure, maintaining relative simplicity while improving reliability.
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 ensures the top hog ring is consistently fed to the fastening position, enhancing the reliability of the C ring fastening process by using the push mechanism to direct the strip correctly, preventing backward movement and facilitating easy loading into the magazine.
Implementation Method 1
a compression spring extended between the spring seat and the first swing member
Implementation Method 2
an extension spring extended between the first and the second swing member
Implementation Method 3
a main pneumatic cylinder for turning the jaws
Implementation Method 4
a feed pneumatic cylinder fixed to the first swing member
Data Source
AI summary
A hog ring fastening device includes a body member, a main pneumatic cylinder attached to the body member, a first swing member supported for turning on the body member, a push means supported on the first swing member, a feed pneumatic cylinder fixed to the first swing member and connected to a port of the main pneumatic cylinder, a second swing member supported for turning on the body member so as to be in contact with the free end of the piston rod included in the feed pneumatic cylinder, a feed means supported on the second swing member, a spring seat fixed to the body member, a compression spring extended between the spring seat and the first swing member, and an extension spring extended between the first and the second swing member.