Rowing Machine Resistance System Using Liquid Tank and Paddle Wheel
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Solution Overview
Problem
Conventional resistance systems for rowing machines are costly due to complex magnetic brake structures and suffer from elastic fatigue in elastic ropes, reducing the effectiveness and service life of the equipment.
Innovation Solution
A resistance system featuring a liquid tank with a paddle wheel and a restoring assembly, which provides fluid resistance and a resilient restoring element, simplifying the structure and reducing manufacturing costs while increasing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a magnetic brake is used in the resistance system, then the resistance force can be generated, but the structure becomes complex and manufacturing cost increases
Solution Approach 1:
The patent replaces the magnetic brake system with a purely mechanical resistance mechanism. The driving strip passes through a guide member that creates friction-based resistance, eliminating the need for magnetic components. This substitution of mechanical friction for magnetic resistance simplifies the overall structure while maintaining the resistance function.
Solution Approach 2:
The patent extracts and removes the magnetic brake component from the resistance system entirely. By taking out the complex magnetic mechanism and replacing it with a simpler guide member and driving strip arrangement, the structure is simplified while the essential resistance function is preserved through friction between the driving strip and guide member.
2Duration of action of moving object
If an elastic rope is used repeatedly, then the exercise function is maintained, but elastic fatigue occurs reducing service life
Solution Approach 1:
The patent employs a driving strip that can be easily replaced rather than relying on a durable elastic rope. The driving strip is designed to be consumable or replaceable, allowing users to simply swap out the worn component rather than replacing the entire resistance system. This approach maintains exercise functionality while providing an economical solution to elastic fatigue.
Solution Approach 2:
The resistance system is segmented into separate replaceable components, with the driving strip being a distinct, replaceable element. This segmentation allows the driving strip to be independently replaced when it shows signs of wear, extending the overall service life of the resistance system without requiring replacement of other components.
3Force
If a complex magnetic brake structure is used, then resistance force is generated, but manufacturing cost increases
Solution Approach 1:
The patent substitutes complex magnetic brake manufacturing with simple mechanical component fabrication. The guide member and driving strip can be manufactured using basic machining processes, eliminating the need for expensive magnetic material processing, assembly, and calibration required for magnetic brake systems.
Solution Approach 2:
The patent uses inexpensive materials for the driving strip and guide member, replacing costly magnetic components. The driving strip can be made from simple polymers or metals, and the guide member from basic structural materials, significantly reducing material costs compared to magnetic brake systems that require specialized magnetic alloys and precision assemblies.
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
The system offers a cost-effective and durable resistance mechanism with increased service life by utilizing a paddle wheel and liquid-based resistance, reducing vibration and allowing for adjustable resistance levels.
Implementation Method 1
The liquid tank is for storing liquid... The paddle wheel is mounted in the liquid tank... provides fluid resistance
Implementation Method 2
The restoring element is resilient... provides a resilient restoring element
Data Source
AI summary
A resistance system for a rowing machine has a mounting bracket, a housing assembly, a paddle wheel, a driving assembly and a restoring assembly. The housing assembly is mounted on the mounting bracket and includes a liquid tank for storing liquid. The driving assembly is connected to the paddle wheel and drives the paddle wheel to rotate in a direction only. The restoring assembly is connected to a strip hub of the driving assembly and is able to drive the strip hub to rotate in a reverse direction. The resistance system for the rowing machine has simplified structure. Therefore, it is easy to assemble to the resistance system, and manufacturing cost of the resistance system can be decreased. In addition, a service life of the resistance system as well as the rowing machine can be increased.