Axially Rotating Free Piston Mechanism for Linear-to-Rotary Conversion
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Solution Overview
Problem
Conventional methods for converting linear motion to rotary motion suffer from substantial energy loss and power loss at the contact area, limiting their efficiency and making them unsuitable for common applications.
Innovation Solution
A piston is slidably engaged with respect to the longitudinal axis of a shaft, allowing reciprocal travel within a cylinder, with the external surface of the piston and internal surface of the cylinder configured to induce rotation during travel, ensuring rotational engagement and minimizing energy loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional crankshaft mechanisms are used to convert linear motion to rotary motion, then rotary motion is generated, but substantial energy loss occurs
Solution Approach 1:
The patent extracts and eliminates the crankshaft component from the conventional linear-to-rotary motion conversion mechanism. By removing the crankshaft and its associated connecting members, the invention directly couples the reciprocating piston motion to rotary output, thereby eliminating the substantial energy losses that occur in crankshaft mechanisms while maintaining the necessary motion conversion function.
Solution Approach 2:
Instead of using a reciprocating member coupled to a crank throw that rotates about an offset axis, the patent inverts the approach by having the reciprocating member directly generate rotary motion through a different mechanical arrangement. The linear motion of the piston is converted to rotary motion through a direct coupling mechanism rather than through the traditional crankshaft inversion, achieving the same functional result with reduced energy loss.
2Loss of energy
If swash plate engines are used to convert linear motion to rotary motion, then energy loss is reduced, but power loss occurs at the contact area
Solution Approach 1:
The patent removes the swash plate component from the system, eliminating the contact area between moving vanes and the outer cylinder that causes power loss. By extracting this problematic element, the invention achieves energy efficient motion conversion without the associated power losses at contact interfaces.
Solution Approach 2:
The patent introduces a direct coupling mechanism as an intermediary between the reciprocating piston and the rotary output shaft. This intermediary mechanism transfers motion efficiently without the sliding contact and friction losses that occur in swash plate systems, thereby maintaining energy efficiency while eliminating power loss at contact areas.
3Loss of energy
If turbine engines are used for motion conversion, then efficiency is improved, but cost increases making them prohibitive
Solution Approach 1:
The patent employs simple, inexpensive mechanical components rather than complex turbine engine parts. The design uses basic elements like pistons, cylinders, and direct coupling mechanisms that are much cheaper to manufacture and maintain compared to turbine engines, while achieving comparable or superior efficiency in the specific application of linear-to-rotary motion conversion.
Solution Approach 2:
The patent changes the operational parameters and design approach from high-cost turbine technology to a simplified mechanical system optimized for the specific task of motion conversion. By adjusting the design parameters to favor simplicity and directness over complexity, the invention achieves high efficiency at a fraction of the manufacturing and operational cost of turbine engines.
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 configuration reduces energy loss and enhances efficiency by directly converting linear motion into rotary motion with minimal power loss, making the engine suitable for various applications.
Implementation Method 1
The piston rotation generation assembly includes a reciprocating member having a first face and a second face opposite one another, a first crank throw coupled to the reciprocating member, a second crank throw coupled to the first crank throw, and a crankshaft coupled to the second crank throw. The geometric arrangement of these components transforms linear reciprocating motion into rotational motion.
Data Source
AI summary
A piston slidably engaged in relation to the longitudinal axis of a shaft rotationally journaled proximate opposed ends to a housing which allows reciprocal travel of the piston within a cylinder of the housing with the external surface of the piston and the internal surface of the cylinder providing mated portions of a piston rotation generation assembly which induces rotation of the piston within the cylinder during reciprocal travel of the piston along the length of the shaft with the piston having rotationally fixed engagement with the shaft such that rotation of the piston within the cylinder generates a corresponding rotation of the shaft.