Selective Stride Elliptical Apparatus with Dynamic Trajectory Control
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Solution Overview
Problem
Existing exercise equipment, such as varying stride elliptical cross trainers, face difficulties in providing easy startup and maintaining elliptical curve paths for varying stride lengths, particularly in simulating walking and jogging with arm exercise.
Innovation Solution
The apparatus features pedals guided through oblong curves with controlled pedal angles and arm exercise coordinated with handle movement, allowing for adjustable stride lengths by varying handle range, with load resistance applied through a pulley system and adjustable incline to enhance exercise intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If pedals follow arcuate curves for short stride lengths, then stride length is reduced, but startup becomes difficult
Solution Approach 1:
The apparatus dynamically adjusts the pedal trajectory from arcuate curves for short strides to more elongated elliptical curves for longer strides. The curve shape changes based on the selected stride length, allowing easy startup at all stride lengths by providing an elongated curve path that facilitates smooth initiation of motion.
2Length of moving object
If pedals follow banana-shaped closed loop curves for long stride lengths, then stride length is increased, but the curve deviates from elliptical shape
Solution Approach 1:
The apparatus maintains consistent elliptical curve geometry across all stride length settings by adjusting parameters such as the ellipse elongation ratio and size. Whether for short, medium, or long strides, the pedal follows an elliptical path with appropriate eccentricity and dimensions, ensuring uniform curve shape classification while varying the actual stride length through control of the ellipse parameters.
3Adaptability or versatility
If variable stride length is implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The apparatus uses a single unified mechanism that generates all three curve types (arcuate, intermediate, and elongated elliptical) through one set of pedals and support structure. The same basic mechanical framework accommodates varying stride lengths by adjusting the trajectory parameters, eliminating the need for separate mechanisms for different stride configurations.
Solution Approach 2:
The system dynamically reconfigures the pedal trajectory within the existing mechanical framework to provide multiple stride length options. By adjusting the motion parameters of the pedal assembly within the same structural constraints, the apparatus achieves adaptability without adding substantial mechanical complexity.
Data Source
AI summary
The present invention relates to a standup exercise apparatus that simulates walking and jogging with arm exercise. More particularly, the present invention relates to an exercise machine having separately supported pedals for the feet and arm exercise coordinated with the motion of the feet where the pedal stride length is determined by the movements of an operator. Crank arms are positioned on the framework forward the operator at a height comparable to the pedals. A hydraulic crossover assembly causes the handles to move in opposing directions.