Tire Sensor Housing Geometry for High-Speed Motion Restraint
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Solution Overview
Problem
Existing housing bodies for functional components in tires fail to adequately restrain the components during high-speed travel, leading to increased movement, heat generation, and damage due to friction, which compromises the durability of both the component and the housing.
Innovation Solution
A housing body design with specific dimensional relationships between the housing body and the functional component, including a bottom portion, crown portion, and opening portion, with defined ratios and angles, to enhance the restraining force while minimizing deformation and stress concentration, thereby preventing damage during high-speed travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the housing body is made larger to accommodate the functional component, then the functional component can be housed, but the functional component moves excessively during high-speed travel causing heat generation and damage
Solution Approach 1:
The patent applies parameter changes by precisely controlling the dimensional ratio between the housing body inner circumferential length (L2) and functional component outer circumferential length (L1). By setting L2/L1 within the specific range of 0.95-1.05, the housing body provides optimal restriction force to prevent excessive movement and heat generation during high-speed travel, while avoiding damage to the functional component.
Solution Approach 2:
The patent applies local quality by creating different structural features at different locations of the housing body. The upper portion has a circumferential length (L2u) that is 95% or more of L1, providing strong restriction, while the lower portion has a circumferential length (L2l) less than L1, allowing flexibility. This gradient structure optimizes both restriction and durability.
2Ease of manufacture
If the housing body is made smaller to reduce material usage, then manufacturing cost decreases, but the functional component cannot be properly housed and moves excessively
Solution Approach 1:
The patent determines the optimal parameter range for L2/L1 (0.95-1.05) that achieves the best balance between material efficiency and functional component stability. This precise parameter control ensures the housing body is neither too large (wasting material) nor too small (causing movement), providing cost-effective manufacturing with reliable performance.
3Strength
If the housing body is made of rigid material to prevent deformation, then structural strength increases, but stress concentration occurs during high-speed travel causing housing body damage
Solution Approach 1:
The patent applies local quality by creating a gradient in the housing body's circumferential length, with the upper portion (L2u) being 95% or more of L1 and the lower portion (L2l) being less than L1. This gradual transition distributes stress more evenly during high-speed travel, preventing stress concentration and housing body damage while maintaining necessary structural strength.
4Reliability
If the housing body tightly restrains the functional component, then movement during high-speed travel is reduced, but the housing body itself may be damaged due to excessive force
Solution Approach 1:
The patent uses parameter changes by setting L2/L1 within the optimal range of 0.95-1.05, which provides sufficient restriction force to prevent functional component movement during high-speed travel, while avoiding excessive force that would damage the housing body. This precise parameter control achieves the right balance between restriction and protection.
Solution Approach 2:
The patent applies local quality through the gradient structure where L2u/L1 ≥ 0.95 and L2l/L1 < 1.00. This creates varying restriction forces at different heights, with stronger restriction at the upper portion and more flexibility at the lower portion, optimizing both functional component stability and housing body durability.
Data Source
AI summary
A functional component to acquire tire information is housed by a housing body. The housing body includes a bottom portion fixed to a tire inner surface, a crown portion protruding from the bottom portion, a housing space formed by the bottom portion and the crown portion, and an opening portion communicating with the housing space. The opening portion has a width smaller than a minimum width of the housing space. A circumferential length (D2u) of an upper portion of the housing space and a circumferential length (D1u) of an upper portion of the functional component satisfy a relationship 0.60≤D2u/D1u≤0.95.