Pipe Joint Chuck with Stopper Member for Tube Severing Prevention
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Solution Overview
Problem
Existing pipe joints can cause excessive piercing of the tube, leading to potential severing when the tube is pulled excessively, and make it difficult to detach the tube from the joint.
Innovation Solution
A pipe joint design featuring a chuck with a stopper member and piercing member, where the stopper member abuts the tube to prevent excessive piercing and is formed with a curved surface and increased length to enhance strength, and multiple piercing members in point symmetry for stable retention, allowing easy detachment by widening the chuck opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the engagement pawl is designed with a piercing member that projects beyond the stopper member to securely retain the tube, then the retention strength is improved, but the tube may be excessively pierced and severed when pulled
Solution Approach 1:
The engagement pawl is segmented into two distinct functional parts: a stopper member that contacts the outer circumferential surface of the tube to limit piercing depth, and a piercing member that actually pierces the tube wall. This segmentation allows each part to perform its specific function without interfering with the other, preventing tube severing while maintaining retention strength.
Solution Approach 2:
The stopper member acts as an intermediary element between the piercing member and the tube. It mediates the interaction by providing a contact surface that restricts how far the piercing member can penetrate into the tube, thereby preventing excessive piercing and tube severing while still allowing secure retention.
2Reliability
If the piercing member is made longer to ensure secure engagement, then the retention reliability is improved, but the tube becomes difficult to detach when the chuck opening is widened
Solution Approach 1:
By separating the engagement pawl into a stopper member and a piercing member, the design allows the piercing member to be optimized for secure engagement (protruding beyond the stopper) while the stopper member controls the maximum piercing depth. This enables reliable retention without making detachment difficult, as the stopper prevents excessive piercing that would complicate release.
3Strength
If the engagement pawl pierces the tube deeply to prevent detachment, then the retention strength is improved, but the tube may be damaged or severed
Solution Approach 1:
The stopper member serves as an intermediary that limits the piercing depth of the piercing member. It provides a physical barrier that prevents the piercing member from penetrating too deeply into the tube, thereby avoiding tube damage or severing while still allowing sufficient piercing depth for secure retention.
Solution Approach 2:
The stopper member is positioned to preemptively prevent excessive piercing before it can occur. By being in place ahead of potential over-piercing, it stops the piercing member at the appropriate depth, preventing tube damage before it happens rather than correcting it after the fact.
Data Source
AI summary
A pipe joint is equipped with a body, and an attachment and detachment mechanism by which a fluid tube is mounted detachably with respect to the body. A pawl of a chuck that constitutes the attachment and detachment mechanism includes a stopper member that abuts against an outer circumferential surface of the fluid tube, and piercing members, distal ends of which project more toward a side of the fluid tube than the stopper member and pierce into the outer circumferential surface of the fluid tube.