Upper Body Exercise Cycle With Independent Crank Arms
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Solution Overview
Problem
Existing exercise cycles primarily focus on leg conditioning and lack independent crank arms for effective upper body exercise, limiting users' ability to work out their arms independently or simultaneously.
Innovation Solution
An upper body exercise cycle with two independent crank arms that utilize a ratchet and pawl mechanism, allowing for independent rotation and adjustable resistance, along with a freewheel mechanism to prevent injury, and adjustable components for user comfort and muscle isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dependent crank arms are used, then the structure is simpler, but the arms cannot rotate independently limiting exercise versatility
Solution Approach 1:
The crank assembly is divided into two independent crank arms (first crank arm and second crank arm) that can rotate independently of each other. Each crank arm has its own rotation axis and can be operated separately, allowing users to exercise one arm at a time or both simultaneously. This segmentation enables versatile exercise options while maintaining a relatively simple overall structure.
2Adaptability or versatility
If independent crank arms with two chains are used, then arm independence is achieved, but the device complexity increases
Solution Approach 1:
Both crank arms share a common flywheel and resistance mechanism instead of having separate chains for each arm. The first and second crank arms both connect to the same flywheel through a common chain system, reducing the number of separate components. This merging approach achieves independent arm rotation capability while minimizing device complexity by consolidating shared components.
3Adaptability or versatility
If fixed resistance is used, then the mechanism is simpler, but it cannot accommodate users of different strength levels
Solution Approach 1:
The resistance mechanism is made adjustable rather than fixed. Users can modify the resistance level by adjusting the tension on the chain or the position of resistance elements, allowing the same device to accommodate users of different strength levels. This dynamic adjustment capability provides versatility while maintaining a relatively simple resistance mechanism that does not require complex electronic controls.
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 users to exercise their upper body effectively, providing cardiovascular and strength benefits with customizable resistance and comfort settings, allowing for both independent and simultaneous arm movements.
Implementation Method 1
The crank assembly utilizes a ratchet and pawl mechanism to allow the crank arms to be independent
Implementation Method 2
The flywheel also employs a ratchet and pawl mechanism to allow the flywheel to freewheel
Implementation Method 3
The flywheel employs an adjustable resistance mechanism to change the resistance in the crank arms
Data Source
AI summary
An upper body exercise cycle comprising crank arms that may independently drive a flywheel, which provides resistance to the crank arms, an adjustable headstock and seat to accommodate users of different sizes and isolate different muscle groups, and a base plate ramp to provide support for the feet and to facilitate transportation of the upper body exercise cycle.