Cycle Transmission Assembly for Low Steering Torque Interference
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Solution Overview
Problem
Traditional cycling devices face challenges in reducing torque interference with steering, particularly in recumbent configurations, where high torque requirements for propulsion compromise steering capability and maneuverability, especially when pedaling and steering must occur in the same plane.
Innovation Solution
A novel transmission system that includes a fixed assembly for torque reduction and a movable epicyclic assembly for torque multiplication, using spur gears and epicyclic gear configurations to minimize steering interference while maintaining sufficient torque for propulsion, allowing for independent pedal cranking and reduced torque impact on steering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If traditional chain assemblies are used to transmit power from pedals to rear wheel, then power transmission is achieved, but steering capability is compromised due to high torque interference
Solution Approach 1:
The transmission system is divided into two independent assemblies: a fixed transmission assembly for torque reduction and a movable transmission assembly for torque multiplication. This segmentation allows the power transmission function to be separated from the steering function, enabling effective steering by isolating it from high torque interference while maintaining efficient power delivery to the wheel.
Solution Approach 2:
The fixed transmission assembly acts as an intermediary between the pedals and the movable transmission assembly. It reduces the high torque generated by the user before it reaches the steering mechanism, thereby preventing steering interference while still allowing power to be transmitted through the system to drive the wheel.
2Speed
If high torque is applied for propulsion, then climbing capability and speed are improved, but steering interference increases
Solution Approach 1:
The system dynamically changes the torque parameter through the two-stage transmission process. The fixed transmission assembly reduces torque to minimal levels that do not interfere with steering, while the movable transmission assembly multiplies torque back up for effective propulsion. This parameter transformation allows high speed and climbing capability without the harmful side effect of steering interference.
3Ease of operation
If recumbent configuration is used, then user comfort and exercise effectiveness are improved, but torque interference with steering is exacerbated
Solution Approach 1:
By segmenting the transmission system into fixed and movable assemblies, the patent enables recumbent configurations to achieve effective steering. The fixed assembly reduces torque before it can interfere with steering, allowing users to benefit from the comfort of recumbent positioning without suffering from excessive steering interference.
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 stable and efficient steering with minimal torque interference, allowing for higher speeds and incline climbing without compromising steering, and provides a modular, versatile cycle device suitable for both manual and hybrid operation.
Implementation Method 1
a fixed transmission assembly that reduces torque levels
Implementation Method 2
a movable transmission assembly that multiplies torque levels
Data Source
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AI summary
A novel transmission for cycles that significantly reduces torque interference with steering operations is provided. Such a transmission allows for improved recumbent cycling capabilities. The inventive device thus includes a combination of a fixed transmission assembly that reduces torque levels and a movable transmission assembly that multiplies torque levels, allowing for the avoidance of high torque effects through the vehicle's steering axis. As such, the capability of the overall cycle device to steer properly and to a rather wide angle from center while implementing such a torque transfer protocol allows for a unique recumbent cycle configuration. Such a device, then, may be utilized for a human-powered cycle vehicle or one that further includes an electrical component to allow for automated drive capabilities through a rear wheel or wheels, as well. The method of implementation of such a transmission within a variety of cycle devices is also encompassed within this invention.