Pneumatic Motor Cylinder Segmentation for Manufacturing
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Solution Overview
Problem
Conventional pneumatic motors are troublesome and expensive to manufacture due to the need for high precision in casting and the bulkiness and heaviness of the cylinder, which requires complex and precise fabrication of multiple apertures, channels, and cavities.
Innovation Solution
A simplified pneumatic motor design with a shell, covers, and a cylinder where the cylinder is not cast with a thick portion, reducing the complexity and precision required in fabrication, and featuring a smaller and lighter axial space for the rotor, with fewer apertures, channels, and cavities, facilitating easier and less costly production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the cylinder is cast with a thick portion to provide structural strength and house internal channels, then the structural integrity is improved, but the manufacturing complexity and cost increase significantly
Solution Approach 1:
The cylinder is divided into two separate components: a simple cylindrical body and a separate cover plate. The cover plate contains all the complex apertures, channels, and cavities, while the cylindrical body remains simple and easy to manufacture. This segmentation eliminates the need for complex casting operations on the main cylinder body.
Solution Approach 2:
The complex features (apertures, channels, cavities) are extracted from the main cylinder body and placed into a separate cover plate component. This allows the main cylinder to be manufactured as a simple, lightweight component while the cover plate handles all the complex fabrication requirements.
2Adaptability or versatility
If multiple apertures, channels, and cavities are made in the cylinder, then the air flow paths are established, but the manufacturing precision requirements increase
Solution Approach 1:
The air flow pathways are segmented between two components: simple apertures in the cylinder body and complex channels in the separate cover plate. This division allows each component to be manufactured with appropriate precision levels for its specific function.
Solution Approach 2:
Instead of creating complex 3D cavities and channels in the cylinder through precision casting, the patent uses a separate cover plate that copies and replicates the air flow pathways through simpler aperture patterns and surface channels, reducing the precision requirements for the main cylinder casting.
3Strength
If the cylinder includes a thick portion, then the structural strength is improved, but the weight and size of the pneumatic motor increase
Solution Approach 1:
The cylinder structure is segmented into a thin-walled cylindrical body and a separate cover plate. The cylindrical body can be made lightweight while the cover plate provides the necessary structural support and houses the complex features, distributing the weight and strength requirements across both components.
Solution Approach 2:
The cylindrical body is designed as a thin-walled structure rather than a thick portion, reducing weight while maintaining structural integrity through the separate cover plate that provides the necessary strength and structural support.
4Reliability
If high precision casting is used to create the eccentric space and internal features, then the functional performance is improved, but the manufacturing cost increases
Solution Approach 1:
The complex casting operations are segmented into a simple cylindrical body and a separate cover plate. The cylindrical body requires minimal precision casting, while the cover plate can be manufactured separately with standard precision techniques, significantly reducing overall manufacturing cost.
Solution Approach 2:
The patent replaces expensive high-precision casting operations with simpler, cheaper manufacturing methods for the cover plate, which can be produced using less costly processes while maintaining functional performance.
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 design results in a more affordable and compact pneumatic motor with reduced manufacturing complexity and weight, making it easier and less expensive to produce while maintaining functionality.
Implementation Method 1
pressurized air travels into the cavities 34 from the inlets 17. A first portion of the pressurized air travels into the space 31 through the inlets 32 while a second portion of the pressurized air travels into the recesses 24 through the apertures 33
Implementation Method 2
The rotor includes two shafts 41 each extending from an end and a plurality of grooves 42 longitudinally defined in the periphery. A fin 45 is movably disposed in each of the grooves 42
Data Source
AI summary
A pneumatic motor includes a shell, two covers, a cylinder and a rotor. The shell defines a space, at least one inlet in communication with the space and at least one outlet in communication with the space. Each of the covers defines at least one radial channel and at least one arched channel in communication with the radial channel. The covers are disposed in the central space of the shell while the radial channel is in communication with the inlet. The cylinder defines a central space and at least one inlet in communication with the central space. The cylinder is located between the covers so that the central space thereof is in communication with the arched channels of the covers and that the inlet thereof is communication with the inlet of the shell. The rotor includes a plurality of fins movably mounted thereon.