Resistance Device Wire Management Mechanism
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Solution Overview
Problem
Existing motor resistance devices for fitness equipment require complex thread structures to guide draw ropes, increasing manufacturing costs and precision requirements, and causing unnecessary friction and resistance.
Innovation Solution
A resistance device using a pulley block, wire management mechanism, and draw wire to guide the draw rope, replacing the thread structure and reducing friction, with a motor as the resistance source, allowing for orderly winding and reduced manufacturing complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a thread structure is used to guide the draw rope, then the draw rope can be prevented from being cross-wound, but the manufacturing costs and precision requirements increase
Solution Approach 1:
The patent introduces a wire management mechanism as an intermediary component between the draw rope and the spool. This mechanism includes a guide wheel and a tensioning device that work together to control the draw rope's path and maintain proper tension, preventing cross-winding without requiring complex thread structures. The wire management mechanism serves as a mediator that simplifies the overall system while ensuring reliable rope management.
Solution Approach 2:
The patent replaces the traditional thread structure with a pulley-based mechanical system. The guide wheel acts as a pulley that redirects the draw rope, while the tensioning device maintains appropriate tension. This mechanical substitution eliminates the need for complex threading arrangements, reducing manufacturing complexity and cost while maintaining the functionality of preventing cross-winding.
2Reliability
If a thread structure is used to guide the draw rope, then the draw rope can be prevented from being cross-wound, but the manufacturing precision requirements increase
Solution Approach 1:
The wire management mechanism serves as an intermediary that handles the precision requirements. The guide wheel is designed with a specific geometry that naturally guides the draw rope along the correct path, and the tensioning device maintains consistent tension to prevent slack that could lead to cross-winding. This intermediary approach reduces the precision requirements for the overall system compared to using a thread structure throughout.
Solution Approach 2:
The patent employs dynamic elements in the wire management mechanism, particularly the tensioning device that can adjust to maintain optimal tension in the draw rope. This dynamic adjustment capability ensures reliable rope management without requiring extremely precise manufacturing tolerances, as the system can adapt to minor variations in assembly or operation.
3Ease of operation
If the draw rope is pressed to guide it, then the draw rope can be controlled, but the friction between the draw rope and the thread increases the resistance
Solution Approach 1:
The patent replaces direct pressing or rubbing contact with a pulley-based system. The guide wheel provides a smooth, rolling contact surface that redirects the draw rope with minimal friction. The tensioning device controls the rope through tension management rather than direct pressing, significantly reducing the friction and resistance that would occur with pressing mechanisms.
Solution Approach 2:
The wire management mechanism segments the control functions into distinct components: the guide wheel handles rope redirection with minimal friction, while the tensioning device manages rope tension separately. This segmentation allows each component to perform its function efficiently without the drawbacks of a unified pressing mechanism, reducing overall friction and resistance.
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 solution reduces manufacturing costs and precision requirements while ensuring orderly winding of the draw rope, simplifying the structure and minimizing resistance, thus enhancing the efficiency and usability of the resistance device.
Implementation Method 1
The pulley block includes at least one fixed pulley and at least one movable pulley. The fixed pulley is fixedly arranged on the fixed plate, and the movable pulley is fixedly arranged on the wire management mechanism.
Implementation Method 2
One end of the draw wire is fixedly arranged on the bobbin, and the draw wire is wound between the bobbin, the fixed pulley and the movable pulley.
Data Source
AI summary
A resistance device includes a resistance source, a winch, a draw rope, a pulley block, a wire management mechanism, a draw wire and a fixed plate. The output end of the resistance source is connected to one end of the winch, and the other end of the winch is pivotably connected to the fixed plate. The wire management mechanism is arranged between the fixed plate and the resistance source. One end of the draw rope is fixedly arranged on the winch, and the other end of the draw rope protrudes out of the wire management mechanism. A bobbin is convexly arranged at an end portion of the other end of the winch. The pulley block includes at least one fixed pulley and at least one movable pulley. The fixed pulley is fixedly arranged on the fixed plate, and the movable pulley is fixedly arranged on the wire management mechanism.