Motorcycle Reverse Gear Assembly Using Planetary Drive Sprockets
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Solution Overview
Problem
Motorcycles lack a reverse gear mechanism, limiting their maneuverability and safety, especially in complex and heavy designs, as they typically rely on manual reversing methods that are inefficient and increase switch complexity.
Innovation Solution
A system comprising a drive sprocket assembly with planetary gears and a vehicle control module that allows for automatic switching between forward and reverse modes using a user interface, where the planetary gears disengage to reverse the direction of the rear wheels by rotating the ring gear in the opposite direction, controlled by a clutch lever and throttle signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reverse gear mechanism is added to motorcycles, then maneuverability and safety are improved, but device complexity increases
Solution Approach 1:
The reverse gear mechanism is nested within the existing transmission system by integrating planetary gears into the drive sprocket assembly. The planetary gears are positioned concentrically with the drive sprocket, allowing reverse function to be embedded within the existing structure rather than adding separate external components.
Solution Approach 2:
The reverse gear functionality is merged with the existing transmission and drive system. The planetary gear set combines with the drive sprocket assembly to provide both forward and reverse operations through a unified mechanism, eliminating the need for separate reverse gear components.
2Device complexity
If manual reversing methods are used, then device complexity is reduced, but ease of operation deteriorates
Solution Approach 1:
The system uses the existing clutch lever and throttle signals to automatically control the reverse operation. When the rider pulls the clutch lever while the vehicle is moving forward, the system automatically engages reverse without requiring manual gear shifting or additional inputs from the rider.
Solution Approach 2:
The control system acts as an intermediary between the rider's clutch lever action and the planetary gear engagement. The controller receives the clutch lever signal and automatically activates the reverse mode, mediating the transition from forward to reverse motion without direct manual intervention.
3Ease of operation
If additional switches are added for reverse mode, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The existing clutch lever is given a dual function: it serves its traditional role in clutch operation and also acts as the activation mechanism for reverse mode. This multi-functional use of the clutch lever eliminates the need for dedicated reverse switches or additional control inputs.
Solution Approach 2:
The clutch lever automatically triggers reverse operation through its existing mechanical signal pathway. The system monitors the clutch lever position and automatically initiates reverse when pulled during forward motion, making the existing component self-sufficient for dual purposes without adding new 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 safe and efficient reverse operation of motorcycles by simplifying the switching process, reducing the complexity of switch layouts, and enhancing maneuverability without the need for additional switches, improving overall vehicle control.
Implementation Method 1
A system comprising a drive sprocket assembly with planetary gears and a vehicle control module that allows for automatic switching between forward and reverse modes using a user interface, where the planetary gears disengage to reverse the direction of the rear wheels by rotating the ring gear in the opposite direction
Data Source
Figure 1A
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AI summary
A system and method for operating the same includes a drive sprocket assembly, a clutch lever, a user interface generating a reverse signal at a user interface, a wheel speed sensor generating a wheel speed signal, a transmission position sensor generating a transmission position signal and a vehicle control module receiving the reverse signal, the wheel speed signal and the transmission position signal. The vehicle control module engages a reverse gear at a drive sprocket in response to the reverse signal, the wheel speed and transmission gear position and controls the drive sprocket assembly in response to the clutch lever.