Helical Human-Powered Generator for Efficient Bidirectional Power Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for efficient human-powered mechanisms that can generate electricity in situations where access to a power grid is limited.
Innovation Solution
A helical drive mechanism that converts linear motion into rotational torque, utilizing a helical member within a frame, with bearings to reduce friction, and an electrical generator to produce electricity, allowing for bidirectional operation and integration with a freewheel for unidirectional output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a human-powered mechanism is designed to generate electricity, then electricity generation capability is improved, but the efficiency and torque output may be insufficient without optimization
Solution Approach 1:
The patent applies parameter changes by optimizing the helical member's geometric parameters, specifically setting the pitch between 85-95mm and lead angle between 24-27 degrees. These parameter optimizations transform the linear motion to rotational motion more efficiently, thereby improving both the power output and efficiency of the human-powered generator without requiring additional energy input
2Productivity
If friction is reduced in the helical drive mechanism, then efficiency is improved, but additional components such as bearings are required
Solution Approach 1:
The patent introduces bearings as intermediary components between the helical member and the frame. These bearings serve as mediators that reduce friction during the conversion of linear motion to rotational motion, thereby improving efficiency. The bearings are strategically positioned at critical contact points to minimize energy loss without over-complicating the overall mechanism
3Power
If the helical member dimensions are optimized for torque output, then power generation is improved, but the device size increases
Solution Approach 1:
The patent optimizes the balance between torque output and device size by carefully selecting the helical member's pitch (85-95mm) and lead angle (24-27 degrees). These parameter changes ensure that the mechanism generates sufficient torque for effective power generation while maintaining a compact form factor suitable for portable applications. The pitch diameter is also controlled to prevent excessive size increase
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 helical drive effectively generates electricity by converting human-powered linear motion into rotational torque, optimizing efficiency and torque output through specific pitch and lead angle configurations, suitable for use in human-powered vehicles and similar devices.
Implementation Method 1
A helical drive mechanism that converts linear motion into rotational torque
Implementation Method 2
with bearings to reduce friction
Implementation Method 3
an electrical generator to produce electricity
Data Source
AI summary
A device including a frame; an actuator attached to the frame and slidaby movable along a linear axis; a helical member positioned within the frame and rotatably movable with respect to the frame about a helical axis that is parallel to the linear axis; and an electrical generator coupled to the helical member such that rotation of the helical member about the helical axis causes the electrical generator to generate electricity, wherein the actuator and the helical member are configured to cooperate with one another such that motion of the actuator along the linear axis in a first linear direction causes corresponding rotation of the helical member about the helical axis in a first rotational direction and motion of the actuator along the linear axis in a second linear direction causes corresponding rotation of the helical member about the helical axis in a second rotational direction.