Eccentric Shaft Cross-Slider Air Compressor Design
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Solution Overview
Problem
Conventional air compressors using a crank mechanism face inefficiencies in air compressing due to limited piston inclination, difficulty in miniaturization, and reduced service life of TEFLON cups due to compression, as well as increased complexity with multiple crank mechanisms.
Innovation Solution
A hybrid air-compressor design incorporating an eccentric shaft and cross-slider mechanism allows vertical piston movement within a cylinder, reducing wear on TEFLON cups and simplifying structure by using a single cross-slider for two piston assemblies, thereby improving durability and reducing part count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a crank mechanism is used in an air compressor, then the piston can be moved along an inclined path, but the air compressing efficiency decreases due to limited inclination angle and the product cannot be miniaturized
Solution Approach 1:
The patent replaces the traditional crank mechanism with an eccentric shaft mechanism. The eccentric shaft rotates eccentrically within the cylinder, directly driving the piston to move vertically along the cylinder axis without inclined movement. This substitution eliminates the inclination angle limitation of crank mechanisms while maintaining the rotary-to-reciprocating motion conversion, thereby improving air compressing efficiency and enabling product miniaturization.
2Ease of operation
If a crank mechanism is used in an air compressor, then the piston can be moved, but the TEFLON cup on the piston is compressed in a predetermined direction which reduces its service life
Solution Approach 1:
The patent replaces the crank mechanism with an eccentric shaft mechanism that eliminates inclined piston movement. By making the piston move strictly vertically along the cylinder axis, the eccentric shaft mechanism removes the directional compression forces that the crank mechanism imposes on the TEFLON cup, thereby preventing premature wear and extending the service life of the sealing cup.
3Ease of operation
If one piston is connected to one crank mechanism, then the piston can be driven, but the number of crank mechanisms must be increased according to the number of cylinders which increases the number of parts
Solution Approach 1:
The patent implements a single eccentric shaft that serves multiple pistons simultaneously. The eccentric shaft rotates within the cylinder and drives multiple pistons through their respective connecting rods, allowing one eccentric shaft to replace what would traditionally require multiple crank mechanisms. This multi-functional design reduces the number of parts and simplifies the overall structure while maintaining the ability to drive multiple cylinders.
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
This design enhances air compressing efficiency, miniaturizes the compressor, extends the service life of TEFLON cups, and simplifies the structure by reducing the number of parts, addressing the limitations of conventional crank mechanism-based air compressors.
Implementation Method 1
an eccentric shaft passing through a side surface of the main body and rotated eccentrically in the cylinder
Implementation Method 2
an air compressing means connected to the eccentric shaft of the motor assembly and moved vertically in the cylinder to alternately compress air introduced into the upper and lower portions of the cylinder
Data Source
AI summary
Disclosed is a hybrid type air-compressor, which has a main body including a cylinder having upper and lower portions, a motor assembly including an eccentric shaft passing through a side surface of the main body to eccentrically rotate in the cylinder, a first communication part covering an upper portion of the cylinder of the main body and introducing air to discharge the air to the upper portion of the cylinder, a second communication part covering a lower portion of the cylinder of the main body and introducing air to discharge the air to the lower portion of the cylinder; and an air compressing means connected to the eccentric shaft of the motor assembly and vertically moving in the cylinder to alternately compress air introduced into the upper and lower portions of the cylinder.