Adjustable Freewheel Wheel for Dual-Mode Exercise Bicycles
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Solution Overview
Problem
Existing exercise bicycles with freewheel and non-freewheel structures require separate purchases, increasing cost and limiting versatility for users who want to perform both spinning and cycling exercises.
Innovation Solution
A freewheel adjustable wheel with a pulley, rotation gear part, and power transmission parts that allow for easy control of freewheel operation, enabling power transmission in both forward and reverse pedal directions without additional motors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a freewheel structure is applied to transmit power only in the forward direction, then the structure allows reverse pedal rotation without resistance, but it cannot transmit power in the reverse direction for spinning exercises
Solution Approach 1:
The power transmission structure is made dynamically adjustable through a mode switch that changes the engagement state of the second power transmission part. In the first mode, the second power transmission part engages with the circular gear to enable reverse power transmission for spinning exercises. In the second mode, the second power transmission part disengages to allow free reverse rotation for cycling exercises. This dynamic reconfiguration allows a single structure to serve multiple exercise purposes.
Solution Approach 2:
The wheel assembly is designed to perform multiple functions by incorporating both a first power transmission part for forward power transmission and a second power transmission part for reverse power transmission. The mode switch enables the system to alternate between these functions, making the same equipment suitable for both spinning exercises (requiring reverse power transmission) and cycling exercises (requiring freewheel operation).
2Adaptability or versatility
If separate spinning bicycle and indoor bicycle are purchased to perform different exercises, then exercise versatility is achieved, but purchase cost increases
Solution Approach 1:
The invention creates a universal exercise bicycle that can perform both spinning and cycling exercises through a single device. The wheel assembly incorporates a mode switch that allows the user to alternate between freewheel mode (for cycling exercises with reverse pedal rotation) and non-freewheel mode (for spinning exercises with power transmission in reverse direction). This eliminates the need to purchase separate equipment for different exercise types.
3Power
If a non-freewheel structure is used to transmit power in both forward and reverse directions, then spinning exercises are enabled, but reverse pedal rotation is resisted during cycling exercises
Solution Approach 1:
The system dynamically adjusts its power transmission characteristics based on the selected mode. When the mode switch engages the second power transmission part, power is transmitted in both forward and reverse directions, enabling spinning exercises. When the mode switch disengages the second power transmission part, the wheel operates in freewheel mode, allowing free reverse pedal rotation for cycling exercises without resistance. This dynamic adjustment resolves the contradiction between power transmission capability and operational ease.
4Reliability
If freewheel operation is controlled by complex mechanisms, then power transmission control is precise, but operation complexity increases
Solution Approach 1:
The invention extracts the mode control function into a separate, simple mode switch that is easily operable by the user. The mode switch directly controls the engagement and disengagement of the second power transmission part with the circular gear. This separation of control function from the main power transmission mechanism ensures reliable power transmission control while maintaining operational simplicity. The mode switch provides clear, distinct positions for freewheel and non-freewheel modes, making it easy for users to select the appropriate exercise mode.
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
Enables a single exercise machine to perform both spinning and cycling exercises, reducing purchase costs and electricity consumption while improving usability and reliability.
Implementation Method 1
When a pedal is rotated in a forward direction, a rotational power transmitted to the rotation gear part through a pulley may be transmitted to the case through a second power supply part
Implementation Method 2
When the pedal is rotated in the reverse direction, the rotational power transmitted to the rotation gear part through the pulley may be transmitted to the case through the engaging gear part of the second power transmission part
Data Source
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AI summary
The present invention relates to a freewheel adjustable wheel and an exercise bicycle including the same and. More specifically, may comprise a rotation gear part which rotates together with a pulley fixed to the outer side thereof and has a circular gear formed along the outer circumference thereof; a case part for rotatably supporting the rotation gear part; a first power transmission part for transmitting power which has been transmitted to the rotation gear part to the case part when the rotation gear part rotates in the normal direction; and a second power transmission part for transmitting power which has been transmitted to the rotation gear part to the case part when the rotation gear part rotates in the reverse direction.