Stud Pin Flange Geometry for Easy Tire Implantation Stability
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Solution Overview
Problem
Existing stud pins in studded tires require precise orientation during installation due to anisotropic shapes, which complicates implantation and increases the likelihood of mistakes, reducing productivity and stability.
Innovation Solution
A stud pin design with an anisotropic lower flange contour shape featuring multiple recess and protrusion portions, allowing for easier gripping and stabilization during installation, and a polygonal body contour shape that enhances resistance to rotation and falling out, ensuring secure fastening within the tire tread.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the stud pin has an anisotropic flange contour shape to prevent falling out, then pin drop resistance is improved, but implantation difficulty increases due to orientation requirements
Solution Approach 1:
The lower flange is designed with an anisotropic contour shape featuring asymmetric distribution of recess portions and protrusion portions. This asymmetric geometry provides directional stability to prevent the stud pin from rotating and falling out, while the specific asymmetric pattern is optimized to be easily recognizable and alignable during the implantation process, resolving the contradiction between prevention of dropout and ease of installation.
2Stability of the object's composition
If the stud pin has a non-arc contour shape to suppress rotation, then stability is improved, but manufacturing complexity increases
Solution Approach 1:
The flange contour is segmented into multiple discrete recess portions and protrusion portions distributed around the circumference. This segmentation creates a polygonal or multi-faceted shape that effectively suppresses rotation by providing multiple flat contact surfaces, while each segment remains a simple geometric feature that is easy to manufacture using standard forming processes, thus balancing rotational stability with manufacturing simplicity.
3Ease of operation
If the stud pin is gripped by installing fingers for implantation, then installation is enabled, but orientation stabilization becomes difficult
Solution Approach 1:
The recess portions and protrusion portions on the lower flange act as intermediary features that facilitate the gripping action of installing fingers. The recess portions provide pockets for finger insertion and the protrusion portions provide contact points for gripping force application. This intermediary geometry enables easy gripping while the asymmetric distribution of these features provides visual and tactile cues for correct orientation, allowing installing fingers to naturally align the stud pin during the gripping and insertion process.
Data Source
AI summary
In a stud pin, a flange contour shape of a lower flange is an anisotropic shape in which, among imaginary rectangles circumscribing the contour shape, the smallest rectangle includes short sides and long sides having different lengths. The flange contour shape includes first recess portions on each of portions of the flange contour shape extending along the short sides, the first recess portions being curved toward a centroid of the flange contour shape, and the flange contour shape includes a second recess portion on portions of the flange contour shape extending along the long sides, the second recess portions being curved toward the centroid of the flange contour shape. A body contour shape of a body portion is a polygonal shape including vertex angles in a same number as the first and second recess portions, and the vertex angles are disposed facing the first and second recess portions.