Rivet Guide Head With Deflecting Pin And Elastomeric Bias
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Solution Overview
Problem
Rivet guide heads in existing rivet machines face assembly challenges due to small, easily lost components and difficulty in setting spring tension, leading to issues like rivets getting caught during the drive stroke.
Innovation Solution
A rivet guide head design featuring elongated guide pins and elastomeric biasing members that deflect laterally to guide the rivet, reducing the risk of catching and simplifying assembly by using fewer and larger components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If small components (plungers, biasing members, set screws) are used in the guide head, then the guide head can contact and guide the rivet, but the components are difficult to assemble and tend to be lost
Solution Approach 1:
The patent combines multiple small components (plungers, biasing members, set screws) into a single integrated guide head assembly. The guide head is formed as one piece with internal cavities that house the biasing members, eliminating the need for separate assembly of these components and preventing them from being lost during operation.
Solution Approach 2:
The guide head is designed with internal segmentation, creating separate cavities within the single body to house the biasing members. This allows the small components to be contained and organized within the larger integrated structure, making them easier to assemble and less likely to be lost.
2Adaptability or versatility
If set screws are used to adjust biasing member tension, then spring tension can be set, but assembly becomes difficult and requires adhesive application
Solution Approach 1:
The patent removes the set screws from the assembly, extracting the tension adjustment function entirely. The biasing members are pre-set during manufacturing to provide the required tension, eliminating the need for field adjustment and the complex assembly process involving adhesive application.
3Reliability
If multiple small plungers are used to contact the rivet, then the rivet can be guided through the drive stroke, but the rivet can be caught or trapped between plungers
Solution Approach 1:
The patent merges multiple plunger contacts into a single continuous guide surface formed by the guide head body. This eliminates the gaps and interfaces between separate plungers where rivets could become trapped, providing smooth and reliable rivet guidance throughout the drive stroke.
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
The design enhances the reliability of the rivet guide head by preventing rivet entrapment and simplifying assembly, ensuring smooth operation and reduced component loss.
Implementation Method 1
the first elongated pin deflects laterally outwardly during the drive stroke
Implementation Method 2
a first biasing member is disposed in the rivet guide head and is configured to bias the elongated guide pin in a direction toward the guide bore axis
Data Source
AI summary
A rivet guide head that guides a rivet during a rivet machine drive stroke is provided. The rivet guide head includes a rivet guide body having a rivet guide surface defined along a rivet guide bore having a guide bore axis. A first elongated guide pin is disposed in the rivet guide head that extends along a first guide pin axis and has an outer engagement surface. The guide bore axis is substantially parallel to the first guide pin axis. The rivet guide head is configured to guide the rivet along the outer engagement surface of the first elongated guide pin during the drive stroke. According to further aspects, the first elongated pin deflects laterally outwardly during the drive stroke. A first biasing member is disposed in the rivet guide head and is configured to bias the elongated guide pin in a direction toward the guide bore axis.