Push Pull Rower Synchronized Flywheel Linkage
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Solution Overview
Problem
Existing rowing machines face issues with uneven resistance, user discomfort due to mixed motion causing motion sickness, difficulty in entering/exit, and the need for heavier or faster flywheels to maintain momentum, as well as incomplete body workout due to directional resistance limitations.
Innovation Solution
A rowing machine design featuring a linear sliding seat and handle arm connected to a flywheel, providing synchronized resistance for both pushing and pulling motions, allowing a smaller and slower flywheel with no up/down movement, easy entry/exit, and eliminating motion sickness by offering a straightforward back-and-forth motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flywheel is made heavier and faster to maintain rotation momentum, then the rotation momentum is strong enough to carry the user through the upward movement, but the device complexity and weight increase
Solution Approach 1:
The patent uses a counterweight mechanism where the seat carriage and its components are designed to balance the flywheel's rotational weight. The seat assembly includes counterbalancing elements that offset the flywheel's tendency to create uneven momentum during rotation, allowing a lighter flywheel to maintain stable rotation without requiring excessive weight or speed.
2Ease of operation
If the upper link is designed to move in an elliptical path with the flywheel, then resistance is provided during rowing, but the user experiences motion sickness from mixed up-and-down and forward-and-back motion
Solution Approach 1:
The patent separates the resistance function from the motion path function. The seat carriage is divided into independent components: the seat assembly that moves horizontally on tracks, and the footrest assembly that remains stationary or moves independently. This segmentation allows the resistance mechanism to provide effective rowing resistance while eliminating the confusing vertical motion component that causes motion sickness.
Solution Approach 2:
Instead of moving the seat in an elliptical path with vertical components, the patent inverts the approach by using a horizontal linear track system. The seat carriage moves only horizontally along guided tracks, reversing the traditional vertical elliptical motion pattern and eliminating the motion sickness caused by mixed directional movements.
3Ease of operation
If the seat is attached to the upper link that moves in an elliptical path, then the user's body follows the elliptical motion, but it is difficult for the user to know which direction they are moving
Solution Approach 1:
The patent inverts the traditional elliptical motion path into a horizontal linear motion path. The seat carriage travels along clearly defined horizontal tracks, providing intuitive directional feedback to the user. This inversion eliminates the directional confusion of elliptical motion by establishing a simple, obvious forward-and-backward movement pattern that is easy for users to understand and follow.
4Adaptability or versatility
If the handle arm and seat are linked together and then to the flywheel, then synchronized resistance is provided for both pushing and pulling motions, but the device complexity increases
Solution Approach 1:
The seat carriage is designed as a multi-functional universal component that performs multiple functions: it supports the user seat, connects to the footrest assembly, provides resistance through the flywheel linkage, and guides horizontal motion along tracks. This universal design consolidates what would otherwise require separate mechanisms, providing bidirectional resistance capability without proportionally increasing device complexity.
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 design enables a consistent workout experience with reduced flywheel weight and speed, easy user access, and reduced risk of motion sickness, providing full-body resistance without directional confusion.
Implementation Method 1
A linear sliding seat that moves in a longitudinal direction is connected to a flywheel to provide resistance to back and forth motion. A handle arm is also connected to the flywheel to provide resistance to back and forth motion.
Implementation Method 2
The flywheel creates cyclical back and forth motion of the seat and handles for the user to push and pull with the arms and legs.
Data Source
AI summary
A rowing machine provides resistance to both pushing and pulling motions of both the upper body and lower body. A linear sliding seat that moves in a longitudinal direction is connected to a flywheel to provide resistance to back and forth motion. A handle arm is also connected to the flywheel to provide resistance to back and forth motion. The flywheel creates cyclical back and forth motion of the seat and handles for the user to push and pull with the arms and legs. The handle arm and seat may be linked together, and then one or the other linked to the flywheel, providing synchronization between the handlebar, carriage and flywheel.