TPMS Valve Stem Assembly for Anti-Rotation Transmitter Mounting
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Solution Overview
Problem
The challenge of preventing the rotation of TPMS transmitters due to eccentricity and centrifugal forces during vehicle operation, which affects signal transmission and mounting stability, is exacerbated by miniaturization and strict positioning requirements.
Innovation Solution
A TPMS transmitter fixing structure is introduced, featuring a valve stem with a protruding part that contacts the wheel rim to prevent rotation, and a center of gravity positioned outside the wheel rim to maintain stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the TPMS transmitter is miniaturized to improve integration, then the device size is reduced, but the difficulty of fixing it to the wheel rim increases and rotation becomes more likely
Solution Approach 1:
The invention introduces an asymmetric protruding structure on the valve stem that engages with a corresponding asymmetric recess on the wheel rim. This asymmetric design creates a unique mounting orientation that prevents rotation of the miniaturized transmitter, resolving the contradiction between reduced size and fixing reliability.
2Ease of manufacture
If the TPMS transmitter is mounted on the wheel rim with loose fixation, then the mounting process is simple, but the transmitter rotates during vehicle operation affecting signal transmission
Solution Approach 1:
The protruding structure on the valve stem automatically engages with the recess on the wheel rim during the mounting process itself, providing self-aligning and self-locking functionality. This eliminates the need for complex additional fixing mechanisms while ensuring stable anti-rotation mounting.
3Manufacturing precision
If the TPMS transmitter is positioned with strict requirements to improve positioning accuracy, then the positioning function is enhanced, but the mounting process becomes more complicated
Solution Approach 1:
The protruding structure is pre-configured on the valve stem at the correct position and orientation before mounting. This preliminary positioning feature guides the transmitter into the correct orientation automatically during installation, achieving precise positioning without complex mounting procedures.
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
The solution effectively prevents rotation and ensures proper mounting direction, reducing the risk of functional loss and performance degradation of TPMS transmitters.
Implementation Method 1
A protruding part is added on the valve stem, which can counteract the rotational torque produced by the eccentricity and centrifugal force of the transmitter
Implementation Method 2
the protruding part is in contact with the wheel rim
Implementation Method 3
a center of gravity positioned outside the wheel rim to maintain stability
Data Source
AI summary
A TPMS transmitter (100) fixing structure, comprising a valve stem and a core rod (200) in the middle of the valve stem, the core rod (200) having a connector suitable for connecting to the TPMS transmitter (100), and also comprising a protruding part protruding outward along the radial direction of the valve stem, such that, when the valve stem is mounted on a wheel rim (300) of an automobile, the protruding part is in contact with the wheel rim (300); adding a protruding part to the valve stem can counteract the rotational torque produced by the eccentricity and centrifugal force of the transmitter to forcefully prevent rotation of the transmitter during operation, and limits the mounting direction of the TPMS transmitter, ensuring that the TPMS transmitter is not biased when mounted on the wheel rim, and effectively reducing the risk of the loss of function or reduction in performance of the TPMS transmitter due to biased or backward mounting of the TPMS transmitter.