Pneumatic Tire Sidewall Protrusion Mud Removal
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Solution Overview
Problem
Pneumatic tires designed for rough road use face challenges in traction and mud removal performance on both tread surfaces and sidewalls, leading to poor running performance on muddy and uneven terrain.
Innovation Solution
The tire features a tread surface with lug grooves that have protruding strips on their bottoms and protrusions on the sidewalls, where the strips start inside the ground-contact point and extend to the sidewall protrusions, enhancing traction and mud removal through vibration during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protruding strips are disposed on the groove bottom of lug grooves, then mud removal performance is improved, but the complexity of the tire structure increases
Solution Approach 1:
The tire structure is segmented into multiple functional components: protruding strips on the groove bottom and protrusions on the sidewall. This segmentation allows each component to perform its specific function independently, with the protruding strips handling mud removal from the groove bottom and the sidewall protrusions providing additional traction and mud ejection, thereby improving overall mud removal performance without creating a monolithic complex structure
Solution Approach 2:
The invention transitions from a two-dimensional groove bottom structure to a three-dimensional structure by adding protrusions on the sidewall that extend beyond the groove opening. This dimensional extension creates multiple levels of mud interaction, allowing the tire to remove mud more effectively from both the groove bottom and the sidewall area, thus improving mud removal performance while maintaining structural organization
2Force
If protrusions are disposed on the sidewall, then traction performance on rough roads is improved, but the complexity of the tire structure increases
Solution Approach 1:
The sidewall protrusions serve multiple functions: they provide traction on rough roads by engaging with the ground surface, assist in ejecting mud from the lug grooves during rotation, and enhance the overall structural rigidity of the tire. This multi-functionality allows a single structural feature to address multiple performance requirements, improving traction without requiring separate dedicated components for each function
Solution Approach 2:
The protrusions are strategically positioned on the sidewall at specific locations where they can maximize their traction effect on rough terrain while minimizing interference with normal tire operation. This localized placement ensures that the additional structural elements are concentrated in areas where they provide the most benefit, thereby improving traction performance with minimal increase in overall structural complexity
3Reliability
If the protruding strip portion extends to connect with the protrusion on the sidewall, then mud removal performance is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The protruding strip portion is designed to extend toward the sidewall protrusion in advance, creating a predetermined alignment path that guides the connection between the two components. This preliminary positioning ensures that during manufacturing and assembly, the strip and protrusion naturally align along the groove's extending direction, reducing the precision requirements for final positioning while still achieving the desired connected structure for effective mud removal
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 design significantly improves traction and mud removal capabilities, allowing for better steering and running performance on rough roads by effectively engaging the sidewalls with the ground and vibrating to dislodge mud from the lug grooves.
Implementation Method 1
the strips start inside the ground-contact point and extend to the sidewall protrusions, enhancing traction and mud removal through vibration during rotation
Data Source
AI summary
An object of the present invention is to provide a pneumatic tire excellent in running performance on a rough road. In order to achieve the object, a pneumatic tire comprises a tread surface having a plurality of lug grooves each of which opens to a sidewall, the sidewall includes a plurality of protrusions disposed thereon, wherein each of the lug grooves includes a protruding strip portion disposed on a groove bottom of the lug groove and extending along an extending direction of the lug groove, the protruding strip portion has a start point thereof at an inner side than a ground-contact point in a width direction as viewed from a front side thereof, and extends up to one of the protrusions beyond an open end of the lug groove located at the sidewall side and is connected to the protrusion.