Tire Valve Carrier Structure for Accurate TPMS Assembly
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Solution Overview
Problem
Existing tire valves with integrated tire pressure monitoring units face increased complexity and incorrect positioning during assembly due to deformation elements, particularly in non-automated screw connections.
Innovation Solution
A tire valve design featuring an arched carrier that is movable along the valve shaft, with a form closure preventing rotary movement but allowing longitudinal shifting, and a separate fastening element to secure the tire pressure monitoring unit, simplifying assembly and reducing material costs by using plastic for the carrier.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a deformation element is used to define an intermediate position for the nut, then the tire pressure monitoring unit can be positioned correctly during assembly, but the complexity of the screw connection increases and incorrect positioning can occur
Solution Approach 1:
The invention removes the deformation element from the screw connection system. Instead of using a deformation element to define positioning, the patent uses a separate positioning element that is integrated into the valve stem, thereby simplifying the screw connection while maintaining positioning accuracy.
Solution Approach 2:
The invention introduces a separate positioning element as an intermediary component between the valve stem and the nut. This positioning element provides the necessary intermediate position definition without requiring deformation of other components, thus avoiding the complexity and positioning errors associated with deformation elements.
2Strength
If a one-piece design of support and valve stem is used, then structural integrity is maintained, but manufacturing costs increase significantly
Solution Approach 1:
The invention divides the valve assembly into separate components: a valve stem and a support (carrier) for the tire pressure monitoring unit. The support can be made of plastic while the valve stem remains metal, allowing each component to be manufactured using optimal processes and materials, thereby reducing overall manufacturing cost while maintaining structural integrity through their assembled connection.
Data Source
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AI summary
The invention describes a tire valve for a vehicle's pneumatic tire, comprising a valve stem with an external thread, a nut matching the external thread, and a domed carrier for a tire pressure monitoring unit. The carrier includes a pressure sensor and a transmitter for wirelessly transmitting pressure data. The carrier is movable along the longitudinal axis of the valve stem and forms a positive connection with a first section of the valve stem, preventing rotation relative to the valve stem but allowing relative movement along the longitudinal axis. According to the invention, the valve stem also has a second section with an outer contour that prevents rotation of the tire pressure monitoring unit relative to the valve stem.