Tire Sensor Housing Crown Geometry for Secure Retention
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Solution Overview
Problem
Existing housing bodies for functional components in tires fail to balance the restraint of the component within the housing body, leading to potential damage or dislodgment during travel due to insufficient or excessive restraint, and can cause cracks or excessive deformation.
Innovation Solution
A housing body design with a fixed bottom portion, a protruding crown portion, and a housing space, where the inclination angle of the crown portion changes upon housing the functional component, maintaining an angle difference of 5 to 15°, along with specific thickness and dimensions, to provide balanced restraint and prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the housing body sufficiently restrains the functional component, then the functional component is prevented from coming off, but the housing body may be excessively deformed and cracks may occur
Solution Approach 1:
The patent changes the geometric parameter of the crown portion by controlling its inclination angle to be within 5-15 degrees relative to the bottom portion. This parameter optimization allows the housing body to provide sufficient restraining force on the functional component while minimizing deformation stress that could cause cracks, thus resolving the contradiction between reliability and structural integrity
2Strength
If the housing body is made more rigid to prevent deformation, then housing body integrity is improved, but the functional component may come off during travel
Solution Approach 1:
The patent optimizes the inclination angle parameter of the crown portion to create a balance between rigidity and flexibility. The 5-15 degree angle provides enough structural rigidity to maintain housing body integrity while still allowing controlled deformation to retain the functional component during travel, resolving the contradiction between strength and reliability
Data Source
AI summary
A functional component to acquire tire information is housed by a housing body. The housing body includes a bottom fixed to a tire inner surface, a crown protruding from the bottom portion, a housing space formed by the bottom and the crown, and an opening communicating with the housing space. An inclination angle θ2 of the crown measured on an outer wall side of the crown in a state where the functional component is housed in the housing space with respect to the bottom is smaller than an inclination angle θ1 of the crown measured on the outer wall side of the crown in a state where the functional component is not housed in the housing space with respect to the bottom. An angle difference θ1−θ2 between the inclination angle θ1 and the inclination angle θ2 is in a range of 5 to 15°.