Rowing Machine Resistance Element Stability and Drive Mechanism
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Solution Overview
Problem
Existing rowing machines lack stability and accurately simulate the resistance and motion of real rowing, leading to an ineffective workout experience.
Innovation Solution
The exercise device features a resistance element with a lower centroid, a dual drive mechanism, and a gear system, along with a spring means for enhanced stability and adjustable resistance, mimicking the dynamics of real rowing by positioning the resistance element centrally and using a hub gear for varied resistance levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the resistance element is positioned higher (conventional design), then the device structure is simpler, but the stability and realism of rowing simulation deteriorates
Solution Approach 1:
The resistance element is repositioned from a horizontal/upper arrangement to a vertical/lower arrangement beneath the seat, changing the spatial dimension and orientation. This dimensional shift lowers the center of gravity and improves stability without significantly increasing structural complexity
Solution Approach 2:
The drive mechanism uses asymmetric positioning of the resistance element relative to the seat, placing it lower and behind the user's center of mass. This asymmetric arrangement creates a more realistic rowing motion profile and improves device stability
2Adaptability or versatility
If a single drive mechanism is used, then the device complexity is reduced, but the versatility and wear distribution deteriorates
Solution Approach 1:
The drive mechanism is segmented into two separate drive elements (first and second drive elements) that independently drive the resistance element. This segmentation allows for better wear distribution, improved versatility in resistance patterns, and enhanced adaptability to different rowing styles
Solution Approach 2:
The dual drive element system provides multi-functionality by enabling different resistance patterns and workout modes. The first and second drive elements can operate independently or in combination, offering versatile training options while managing component wear
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 configuration provides increased stability, a more realistic rowing simulation, and versatility in user experience through adjustable resistance and reduced wear on components, enhancing the overall workout quality.
Implementation Method 1
a spring means for supporting longitudinal movement of the first structural member
Implementation Method 2
a resistance element with a lower centroid... Placing the resistance element centrally... provides increased stability
Data Source
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AI summary
The invention relates to an exercise device, comprising: - a first elongated structural member extending in a longitudinal direction; - a resistance element connected to said first structural member for providing a resistance force; - a seat connected to said first structural member, said seat comprising a seating surface; - a drive means for driving said resistance element, said drive means comprising a handle to be held by a user; wherein said seat and said resistance element are moveable with respect to each other in a direction parallel to the longitudinal direction of said first structural member.