Snap-in Valve Fastener for Tire Pressure Sensor Housing
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Solution Overview
Problem
Existing tire pressure measurement devices face challenges in assembly due to complex attachment mechanisms and potential hysteresis issues caused by centrifugal forces, leading to non-linear relationships between tire pressure and sensor movement, which complicates accurate and reliable measurement.
Innovation Solution
A tire pressure measurement device with a fastening element that allows for easy mounting from above, featuring an adjustable angle between the fastening element and valve axis (30-150 degrees) and anti-twist protection, along with a detachable and quick-fastening mechanism, ensuring correct assembly and direct air exchange into the tire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex attachment mechanism is used to secure the sensor to the valve, then the reliability of the connection is improved, but the ease of assembly deteriorates
Solution Approach 1:
The fastening element is divided into distinct functional segments: a fastening portion for securing to the valve base, a receiving portion for the sensor housing, and an integrated anti-rotation protrusion. This segmentation allows each feature to perform its specific function independently while simplifying the overall assembly process.
Solution Approach 2:
The anti-rotation feature is merged directly into the fastening element structure rather than being a separate component. The protrusion on the fastening element engages with a corresponding recess in the sensor housing, combining multiple functions (fastening and anti-rotation) into a single integrated component that simplifies assembly.
2Reliability
If the fastening element is securely attached to the valve base, then the reliability of the connection is improved, but the accessibility for mounting deteriorates
Solution Approach 1:
Instead of attaching the fastening element from the side or bottom of the valve base, the design allows the fastening element to be mounted from above the valve base. The fastening portion engages with the valve base from the top surface, making it accessible to standard electric screwdrivers and simplifying the mounting process.
3Measurement precision
If the sensor housing is rigidly fixed to prevent movement, then the measurement precision is improved, but the device complexity increases
Solution Approach 1:
The anti-rotation function is extracted from the housing structure and transferred to the fastening element. The protrusion on the fastening element engages with a recess in the housing, eliminating the need for complex anti-rotation features within the housing itself while maintaining measurement precision.
4Adaptability or versatility
If multiple separate components are used for fastening and anti-rotation, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The fastening element combines multiple functions into a single component: fastening to the valve base, securing the sensor housing, and preventing rotation through the integrated protrusion. This reduces the total number of components while maintaining the necessary adaptability and functionality.
Data Source
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AI summary
A device for measuring tire pressure in a pneumatic tire of a motor vehicle using a sensor on the rim well of a rim which accommodates a tire valve for the pneumatic tire and a receiver outside of the pneumatic tire being assigned to the sensor, wherein an electronics housing or signal housing assigned to the rim well is connected to the tire valve, said housing containing transmission electronics as the tire pressure sensor, and is connected to the tire valve by a fastening element substantially in the region of the valve base part.