Pneumatic Tire Inner Surface Sensor Mounting
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Solution Overview
Problem
Existing methods for mounting electronic circuit devices like air pressure sensors on pneumatic tires using surface fasteners are prone to liquid adhesion during puncture repair, leading to damage and inconsistent engagement forces due to the curved tire surface, which results in partial physical deterioration and reduced durability.
Innovation Solution
A pneumatic tire design utilizing a pair of mechanical fasteners that can be separated and re-engaged, with the electronic circuit device housed in a casing and secured by fasteners positioned from the bead tip to the maximum tire width, incorporating mechanisms to prevent rotation and ensure accurate positioning, and featuring air holes in the casing to prevent liquid ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If surface fasteners are used to attach electronic circuit devices to the tire inner surface, then engagement can be achieved on the curved surface without slight misalignments, but the engagement force varies positionally and deteriorates over time due to repetitive deformation and compression
Solution Approach 1:
The invention divides the attachment system into two separate fasteners: one fastener attached to the tire inner surface and another fastener attached to the electronic circuit device. This segmentation allows each fastener to be independently positioned and secured, eliminating the engagement force variation caused by surface curvature while maintaining ease of attachment.
2Ease of manufacture
If surface fasteners are used to mount electronic circuit devices, then attachment is achieved, but liquid adhesion during puncture repair damages the electronic circuit device
Solution Approach 1:
The invention introduces a casing as an intermediary protective structure that houses the electronic circuit device. The casing includes liquid-resistant properties and features such as overhangs or flanges that prevent liquid adhesion during puncture repair, thereby protecting the electronic circuit device while maintaining attachment capability through the fastener system.
3Adaptability or versatility
If electronic circuit devices are mounted on the tire inner surface, then functionality is added, but liquid ingress during puncture repair causes malfunction
Solution Approach 1:
The invention employs a casing structure that acts as a flexible protective shell around the electronic circuit device. The casing includes liquid-resistant features such as overhangs, flanges, or integrated seals that prevent liquid ingress during puncture repair, ensuring the electronic circuit device maintains its functionality and reliability under various operating conditions.
Data Source
AI summary
A pneumatic tire includes: one fastener among a pair of mechanical fasteners that are separated into two in a region of a range from a bead tip to the maximum width position of a tire at a tire inner surface; and an electronic circuit device with another fastener that is to be engaged with the one fastener, the electronic circuit device being secured to the tire inner surface by fitting the two fasteners. In the pneumatic tire with such a configuration, even in the case where the electronic circuit device is mounted on the tire inner surface and liquid such as puncture repair liquid is injected in the tire at puncture, there is no possibility of damaging the electronic circuit device due to adhesion of the liquid to the electronic circuit device such as an air pressure sensor.