Asymmetric Stud Pin Lower Flange for Tire Insertion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The difficulty in inserting stud pins into pneumatic tires due to increased cases where the pins cannot be pressed into the hole, while maintaining superior pin release resistance, is a challenge in conventional stud pin designs.
Innovation Solution
A stud pin design featuring a trunk portion with an upper flange and a lower flange, where the lower flange has a peripheral shape with a first side protruding orthogonally and a second side recessed, allowing for easier insertion and improved pin release resistance by holding positions on the edge of the lower flange using a stud pin insertion apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If curved recesses are provided in the side surfaces of the upper flange and lower flange to improve pin release resistance, then the stud pin becomes difficult to insert into the hole
Solution Approach 1:
The invention applies different geometric characteristics to different parts of the lower flange: the first side has a protruding rounded shape that facilitates insertion by reducing contact area with the hole wall, while the second side has a recessed shape that provides rotational resistance. This local differentiation resolves the contradiction between ease of insertion and pin release resistance.
Solution Approach 2:
The lower flange is designed with asymmetric geometry where the first side protrudes roundly and the second side is recessed, creating unequal interaction with the hole wall during insertion and operation. This asymmetry allows the stud pin to be easily inserted while maintaining resistance against rotation and release, directly resolving the technical contradiction.
2Reliability
If the stud pin is firmly embedded in the hole to prevent release, then the stud pin may rotate relative to the hole during release
Solution Approach 1:
The asymmetric design of the lower flange with one protruding side and one recessed side creates directional engagement with the hole wall. The recessed side specifically engages to prevent rotation while the protruding side facilitates insertion, resolving the contradiction between firm embedding and rotational stability.
Solution Approach 2:
Different portions of the lower flange perform different functions: the protruding rounded first side reduces friction during insertion, while the recessed second side provides mechanical interlocking to prevent rotation. This local functional differentiation resolves the contradiction between embedding firmness and rotational stability.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Stud pin is provided for easy insertion and for superior pin release resistance. When the lower flange of the stud pin is viewed in an extending direction of the trunk portion, an edge defining a peripheral shape of the lower flange has a first side of a shape protruding roundly toward an outer side of the lower flange, protruding in a first direction orthogonal to the extending direction of the trunk portion, and a second side provided on an opposite side to the first side with respect to a tip disposal position where the tip is provided. The second side extends in a second direction orthogonal to the first direction and the extending direction, and is provided with a recess that is recessed toward an inner side of the lower flange.