Air Compressor Pressure Gauge Structure With Rack-and-Spring Sensing
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Solution Overview
Problem
Existing small air compressors for inflating car tires and air mattresses have mechanical pressure gauges that require precise components, which are prone to damage and lead to inaccurate measurements.
Innovation Solution
An air compressor structure with a simplified pressure gauge design that includes a propelling barrel, value panel, pointer, and spring, where compressed air directly drives the propelling barrel within the cylinder lid, converting linear motion into rotational motion via a gear rack and gear, with a spring providing elastic force to balance driving force and reflect pressure values intuitively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mechanical pointer type pressure gauge based on Bourdon tube principle is used, then pressure measurement function is achieved, but the structure becomes complex and precision components are prone to damage
Solution Approach 1:
The patent extracts the essential measurement function from the complex Bourdon tube mechanism and implements it using a simple spring-based system. The propelling barrel directly receives compressed air and moves linearly, eliminating the need for complex Bourdon tube components while achieving the same pressure measurement objective through a simplified structure.
Solution Approach 2:
Instead of using a traditional Bourdon tube mechanism, the patent creates a simplified copy of the pressure sensing function using a propelling barrel and spring system. This copied mechanism replicates the essential measurement capability without the complexity of the original design, using basic components that are easier to manufacture and less prone to damage.
2Measurement precision
If precision components are used in the pressure gauge, then measurement accuracy is improved, but durability decreases due to component damage susceptibility
Solution Approach 1:
The patent replaces expensive, fragile precision components with simpler, more durable components that can withstand rough handling. The spring and propelling barrel are designed to be robust and resistant to damage, prioritizing durability over using delicate high-precision parts, while still maintaining adequate measurement accuracy for the application.
3Ease of manufacture
If a simplified pressure gauge structure is used, then durability and ease of manufacture are improved, but measurement precision may deteriorate
Solution Approach 1:
The patent adjusts the spring constant and propelling barrel dimensions to optimize the balance between simplicity and measurement accuracy. By carefully selecting these parameters, the simplified structure achieves sufficient precision for tire inflation applications without requiring complex manufacturing processes or delicate components.
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 simplified pressure gauge provides accurate and immediate pressure readings without complex components, enhancing durability and precision while maintaining a compact and intuitive design.
Implementation Method 1
The compressed air provides a driving force to the propelling barrel, so that the propelling barrel moves within the cylinder lid
Implementation Method 2
the moving propelling barrel moves the pointing portion of the pointer on the value panel through a collaboration of the gear rack and the gear until the driving force and the elastic force are balanced
Implementation Method 3
the moving propelling barrel moves the pointing portion of the pointer on the value panel through a collaboration of the gear rack and the gear
Data Source
AI summary
An air compressor structure includes a cylinder, a piston, a cylinder lid, and a pressure gauge. The piston coupled in the cylinder performs reciprocating motion to generate compressed air, and the cylinder lid is assembled to the cylinder to receive the compressed air. The pressure gauge includes a propelling barrel movably disposed in the cylinder lid and having a gear rack, a value panel disposed on a surface of the cylinder lid, a pointer, and a spring disposed in the cylinder lid and abutting against the propelling barrel. The pointer includes a pointing portion and a pivot, where the pivot is disposed on the cylinder lid and has a gear engaged to the gear rack, and the pointing portion extends from the pivot and is located on the value panel.