Radial Piston Compressor Assembly for Tire Pressure
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Solution Overview
Problem
Existing tire pressure fluid supply systems require frequent manual checks and are unreliable due to the operational challenges of rotary unions, which are difficult to design for long-term reliability and durability, especially in harsh conditions near vehicle wheels.
Innovation Solution
A compressor assembly with a hub-side compression chamber that uses a cam mechanism to convert rotary movement into oscillating translatory movement, eliminating the need for rotary unions by pressurizing fluid directly within the rotating wheel hub, allowing for continuous and reliable tire pressure maintenance without external power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rotary unions are used to supply pressure fluid to rotating wheels, then continuous tire pressure maintenance is enabled, but the reliability and durability of the system deteriorates due to the operational challenges of rotary unions in harsh conditions
Solution Approach 1:
The invention extracts and eliminates the rotary union component from the system by integrating the compression chamber directly into the rotating wheel hub. This removes the problematic rotating seal interface that compromises reliability while maintaining the ability to continuously supply pressurized fluid to the tire cavity during wheel rotation
Solution Approach 2:
The invention merges the compression chamber with the wheel hub structure, creating an integrated unit where the compressor component rotates with the hub. This combination eliminates the need for separate rotary unions and allows direct pressurization of the tire cavity from the rotating hub, improving both reliability and continuous operation capability
2Ease of operation
If external pressure fluid sources are used to fill tire cavities, then tire pressure can be checked and corrected, but the system requires frequent manual intervention and vehicle stops
Solution Approach 1:
The invention implements a self-service system where the wheel-mounted compressor automatically monitors and maintains tire cavity pressure without external intervention. The compression chamber continuously or periodically pressurizes the tire cavity as needed, eliminating the requirement for manual pressure checks and vehicle stops, thereby recovering time and improving operational convenience
3Reliability
If rotary unions are designed to be rugged and long-lived, then operational reliability improves, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The invention removes the rotary union component entirely from the system architecture. By integrating the compression function directly into the wheel hub, the design eliminates the complex rotating seal interface and associated manufacturing challenges, achieving reliability improvement through simplification rather than through enhanced rotary union design
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 compressor assembly ensures continuous, reliable, and low-maintenance tire pressure management, reducing the need for frequent manual checks and extending the operational life of the system by integrating the pressure fluid supply directly into the wheel hub, thus enhancing vehicle performance and reducing maintenance costs.
Implementation Method 1
the compressor assembly comprises a transmission, preferably a cam mechanism, which is equipped, through a cooperation of a wheel mount-side transmission part with a hub-side transmission part, to convert a rotary movement between the wheel mount side and the wheel hub side into an oscillating translatory movement of the compressor component
Implementation Method 2
a pressure fluid that is to be conveyed into the tire cavity can be pressurized through a volume reduction of the compression chamber
Data Source
AI summary
A compressor assembly for supplying pressure medium to a tire cavity of a vehicle wheel that can be mounted on a wheel hub which is mounted on a wheel carrier so as to be rotatable about an axis of rotation. A transmission, preferably a cam mechanism, is equipped, through a cooperation of a wheel mount-side transmission part with a hub-side transmission part, to convert a rotary movement between the wheel mount side and the wheel hub side into an oscillating translatory movement of the compressor component, with the translatory movement of the compressor component extending at least partially, preferably entirely, in a radial direction that is oriented orthogonally to the axis of rotation.