Rowing Machine Pitching and Rolling Motion Mechanism
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Solution Overview
Problem
Conventional rowing machines lack the ability to simulate the dynamic pitching and rolling motions experienced during actual rowing, which can limit the effectiveness of the workout and the ability to mimic real-life rowing conditions.
Innovation Solution
The rowing machine incorporates mechanisms for transferring pitching and rolling motions to the user, featuring spring and damper arrangements and rotatable bearing assemblies, with adjustable damping to replicate the sensations of pitching and rolling, and an adjustable resistance mechanism using a flywheel with vanes connected to a central shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional rowing machines use a fixed rigid structure, then manufacturing is simple and device complexity is low, but the ability to simulate dynamic pitching and rolling motions is lost
Solution Approach 1:
The rigid main body is segmented into multiple independent sections (front section, rear section, seat section) that can move relative to each other. Each section is equipped with independent pitching and rolling mechanisms, allowing localized motion simulation while maintaining overall structural integrity. This segmentation enables complex dynamic simulation without requiring the entire structure to be overly complicated.
Solution Approach 2:
The pitching and rolling mechanisms are designed with multi-functional components that serve multiple purposes. For example, the spring-damper systems provide both motion simulation and structural support, while the bearing assemblies enable both pitching and rolling motions. This multi-functionality reduces the number of separate components needed, thereby managing device complexity while achieving adaptability.
2Adaptability or versatility
If spring and damper arrangements are added to provide pitching motion, then motion simulation capability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The pitching mechanism uses spring-damper arrangements that provide dynamic, adjustable motion characteristics. The springs enable the pitching motion while the dampers control the rate of motion, creating a realistic simulation of water resistance. These dynamic components are integrated into the existing structural framework, allowing motion simulation without requiring complete structural redesign.
Solution Approach 2:
The spring and damper systems allow for parameter adjustment to simulate different rowing conditions. By changing spring constants or damper coefficients, the system can adapt to various water conditions and rowing intensities. This parameter-based approach enables versatile motion simulation while using standard off-the-shelf components, simplifying manufacturing.
3Adaptability or versatility
If rotatable bearing assemblies are added to provide rolling motion, then motion simulation capability is improved, but device complexity increases
Solution Approach 1:
The rolling mechanism merges the bearing assembly directly with the existing structural components. The bearings are integrated into the main body sections, allowing rolling motion without requiring separate mounting structures. This merging approach reduces the number of discrete parts and simplifies the overall mechanism while achieving realistic rolling simulation.
Solution Approach 2:
The bearing assemblies enable smooth rotational (rolling) motion of the main body sections. By using curved/rotational joints instead of linear connections, the system naturally simulates the rolling motion experienced during actual rowing. This geometric approach to motion simulation is achieved through standard bearing components rather than complex mechanisms.
4Adaptability or versatility
If adjustable damping mechanisms are added to rolling mechanisms, then motion customization capability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The damping mechanisms use adjustable parameters (such as damper valve settings or spring pre-loads) to control the characteristics of rolling motion. Users can modify damping levels to simulate different water conditions or personal preferences. This parameter-based control achieves motion customization using relatively simple, adjustable components rather than complex reconfigurable mechanisms.
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 enhances the workout experience by providing a more realistic simulation of rowing, engaging core muscles and improving core strength, while allowing for adjustable resistance and feedback on user interface displays.
Implementation Method 1
each pitching mechanism comprises a spring and/or a damper arrangement
Implementation Method 2
each pitching mechanism comprises a spring and/or a damper arrangement
Implementation Method 3
each rolling mechanism comprises a rotatable bearing assembly
Implementation Method 4
each rolling mechanism comprises a damping mechanism to dampen and/or limit rolling
Implementation Method 5
said damping mechanism of each rolling mechanism comprises one or more resilient bump-stops
Implementation Method 6
said resistance mechanism comprises a flywheel having one or more vanes connected to a central shaft
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
A rowing machine comprising: a main body portion extending along a longitudinal axis from a first end of the rowing machine to a second end of the rowing machine; a seat portion; a handle portion; the seat portion and handle portion configured to enable a user to simulate a rowing motion during use of the rowing machine; wherein the rowing machine comprises at least one mechanism configured for transferring a pitching motion to a user relative to said longitudinal axis, during use of the rowing machine.