Inflatable Pump Plastic Cylinder Rotary Joint Assembly
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Solution Overview
Problem
Existing inflatable pumps have complex assembly structures, high production costs, and environmental pollution due to metal processing, which complicates the assembly of metal air cylinders and discs.
Innovation Solution
The use of a plastic air cylinder and disc connected through rotary joint protrusions and holes, eliminating the need for additional fasteners and assembly jigs, and produced via injection molding to simplify assembly and reduce environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal air cylinder and metal disc are used with screw fastening, then connection strength is ensured, but assembly complexity increases and production costs rise
Solution Approach 1:
The patent merges the air cylinder and disc by integrating the fastening function into the disc structure itself. The disc includes a recess that receives and secures the air cylinder, eliminating the need for separate screws and spring washers. This integration reduces the number of fastening components from over 12 to just the disc structure, significantly simplifying assembly while maintaining connection strength.
Solution Approach 2:
The patent extracts and eliminates unnecessary fastening components (screws, spring washers, and complex assembly fixtures) by incorporating the fastening function directly into the disc structure. The recess in the disc serves as both a structural element and a fastening mechanism, removing the need for separate fastening hardware and reducing assembly complexity.
2Strength
If metal processing is used for air cylinder and disc, then structural strength is achieved, but environmental pollution occurs
Solution Approach 1:
The patent changes the material parameter from metal to plastic for both the air cylinder and disc. This material substitution eliminates the need for metal processing operations (cutting, heat treating, grinding, etc.) that generate oil pollution and chemical fluid waste. The plastic materials maintain sufficient structural strength while being environmentally friendly during manufacturing.
Solution Approach 2:
The patent adopts plastic materials that are easier to process and dispose of compared to metal. Plastic air cylinders and discs can be manufactured through simpler processes without generating harmful metal processing waste, and plastic components are generally easier to recycle or dispose of environmentally responsibly.
3Reliability
If multiple screws and spring washers are used for assembly, then connection reliability is improved, but production time increases
Solution Approach 1:
The patent combines multiple fastening functions into a single integrated disc structure. The disc includes a recess that simultaneously provides positioning, retention, and fastening functions that previously required multiple screws and spring washers. This integration allows the air cylinder to be installed in one operation without requiring sequential tightening of multiple fasteners.
Solution Approach 2:
The patent segments the fastening function into the disc structure itself, creating a self-contained fastening mechanism. The recess in the disc is designed to receive and secure the air cylinder, making the disc both a functional component and a fastening device, thereby eliminating the need for separate fastening operations.
Data Source
AI summary
The disclosure provides an inflatable pump comprising an inflatable pump body, a plastic air cylinder and a plastic disc. A side of the inflatable pump body is provided with a bracket, the plastic air cylinder and the bracket are connected to each other through rotary joint protrusions and rotary joint holes, and the plastic disc is fastened to a top side of the plastic cylinder. By adopting the inflatable pump of the disclosure, the production and processing of the plastic air cylinder and the plastic disc is more convenient and will not cause environmental pollution. Meanwhile, the plastic air cylinder and the plastic disc can meet structural accuracy requirements of the inflatable pump. Furthermore, the plastic air cylinder and the bracket are connected to each other through rotary joint protrusions and rotary joint holes, no additional fasteners and assembly jigs are needed.