Eccentric Gravity Wheel Drag Gain Structure
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Solution Overview
Problem
Existing fitness equipment designs face limitations in achieving significant drag effect due to constraints on the outside diameter, wheel width, and weight of the gravity wheel, leading to bottlenecks in drag performance and increased space and material costs with current belt pulley block and magnetic drag regulator systems.
Innovation Solution
The drag gain structure incorporates an eccentric driving member and a bearing pedestal with bias joint pins, allowing for indirect transmission and enhanced drag force without increasing the gravity wheel's diameter, utilizing a zigzag transmission structure that links the shaft to the gravity wheel through eccentric positions, reducing space and material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If belt pulley block variable-speed gear structure is used to increase drag effect, then drag performance is improved, but device complexity and space occupation increase
Solution Approach 1:
The patent extracts the drag control function from complex external mechanisms (belt pulley blocks, magnetic regulators) and integrates it directly into the gravity wheel structure through eccentric positioning of the gravity wheel relative to the rotation axis, simplifying the overall device structure while maintaining drag performance
Solution Approach 2:
The patent merges the drag generation function with the gravity wheel structure itself by positioning the gravity wheel eccentrically, combining what were previously separate functions (gravity wheel rotation and drag generation) into a single integrated structure
2Measurement precision
If electrically controlled magnetic drag regulator is used to adjust drag, then drag control precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent removes the electrically controlled magnetic drag regulator and its associated control systems, extracting the drag control function and implementing it mechanically through the eccentric gravity wheel structure, thereby eliminating complex electrical control components
Solution Approach 2:
The patent replaces the electrical control system with a mechanical solution, where the eccentric positioning of the gravity wheel creates variable drag through mechanical means rather than electrical control, substituting complex electrical systems with simpler mechanical geometry
3Force
If gravity wheel specifications are increased to enhance drag effect, then drag performance is improved, but device volume and weight increase
Solution Approach 1:
The patent employs asymmetric positioning of the gravity wheel relative to the rotation axis, creating an eccentric configuration where the gravity wheel center does not coincide with the rotation axis. This asymmetric arrangement generates variable drag forces throughout the rotation cycle, enhancing drag performance without requiring increases in gravity wheel size
Solution Approach 2:
The patent introduces a new dimensional aspect to drag generation by positioning the gravity wheel in an eccentric location, creating radial variations in drag force during rotation. This dimensional change in force application (from uniform to radially varying) enhances drag effect without increasing the physical dimensions of the gravity wheel
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 significantly increases the driving drag, reduces component and assembly costs, and enhances the drag sense by over 10 times compared to traditional systems, offering improved economic benefits and practical progressiveness.
Implementation Method 1
an eccentric driving member, disposed on the first side of the gravity wheel... the first coupling end of the inner side plate section is connected to an eccentric position of the gravity wheel by a first bias joint pin... the protruding end of the radial protruding plate is connected to an eccentric position of the gravity wheel through the second bias joint pin
Implementation Method 2
the interconnecting piece is rotationally coupled to at least one of the extension end and the second coupling end... forming the zigzag transmission structure that links the shaft to the gravity wheel through eccentric positions
Implementation Method 3
a bearing pedestal, disposed on the second side of the gravity wheel and screwed on the periphery of the shaft, there is an axial spacing between the bearing pedestal and the gravity wheel, the bearing pedestal includes more than one bearing
Data Source
AI summary
A drag gain structure for the gravity wheel of fitness equipment includes an eccentric driving member disposed on the first side of the gravity wheel, which includes inner and outer side plate sections, and an interconnecting piece. The interconnecting piece is rotationally coupled to at least one of the plate sections. One end of outer side plate section is fitted over and fixed to the shaft, and one end of inner side plate section is connected to an eccentric position of gravity wheel through the first bias joint pin. A bearing pedestal is disposed on the second side of the gravity wheel, including a bearing screwed on the shaft, a pedestal shell fitted over the bearing and a radial protruding plate on the periphery of pedestal shell. The protruding end of the radial protruding plate is connected to an eccentric position of gravity wheel through the second bias joint pin.