Cantilever Beam Linkage for Human-Powered Flight Lift
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Solution Overview
Problem
Current flying machines powered by human flapping wings have not achieved human flight due to the inability to generate sufficient lift force, as existing mechanisms fail to effectively translate human power into the required lift forces for flight.
Innovation Solution
The Cantilever Beam Linkage mechanism, utilizing one- or two-planar 4-bar parallelogram linkages, provides a structural support system that separates forces and moments, allowing for reciprocal stroke motions in cantilever beams, suitable for applications like rowing boat oars and flapping aircraft/bird wings, enabling efficient power transmission and long stroke distances necessary for lift generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If existing mechanisms are used to translate human power into lift forces, then the mechanism structure is simple, but the generated lift force is insufficient for flight
Solution Approach 1:
The mechanism is divided into distinct functional segments: the 4-bar parallelogram linkage for stroke generation, the guided roller support for motion control, and the load separator for force isolation. This segmentation allows each component to be optimized for its specific function while working together to generate sufficient lift force for flight.
Solution Approach 2:
The invention transitions from simple planar motion to three-dimensional spatial motion by incorporating the guided roller support that allows rotation about a vertical axis while maintaining horizontal translation. This dimensional change enables the cantilever beam to generate lift forces in the vertical dimension while the mechanism operates primarily in the horizontal plane.
2Length of moving object
If long stroke motions are required for lift generation, then the stroke distance is sufficient, but the body width becomes excessively narrow
Solution Approach 1:
The mechanism achieves long stroke distances by utilizing three-dimensional spatial motion rather than being constrained to a narrow planar width. The guided roller support enables the cantilever beam to extend its stroke in the horizontal direction while the mechanism's vertical dimension accommodates the motion, effectively decoupling stroke distance from body width constraints.
Solution Approach 2:
The guided roller support acts as an intermediary between the 4-bar linkage and the cantilever beam, translating the rotational motion of the linkage into extended horizontal stroke motion. This intermediary component allows the system to achieve long stroke distances without requiring excessive narrowness in the body width, as the motion is facilitated through spatial rather than purely planar constraints.
Data Source
AI summary
A Cantilever Beam Linkage is disclosed for a mechanism and structural support to power and control a cantilever beam in reciprocal motions, by adopting and using planar 4-bar parallelogram linkages, typically for drive mechanisms, into mechanisms to function as guided roller supports, free to translate but fixed for rotational motions; and as load separators where forces and moments are separated. A Cantilever Beam Linkage is applicable for a cantilever beam in reciprocal motions to have its powering and controlling applied forces confined within narrow bodies, to have the cantilever beam extends out multiple times the narrow body width, and to have applied forces equal to response forces; and is particularly suitable for applications such as: a rowing boat oar and a flying machine flapping wing.