Motorcycle Reverse Drive Assembly Using Dog Clutch Engagement
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Solution Overview
Problem
Motorcycles lack a reverse drive mechanism, making it difficult for users to move them in reverse, especially for smaller users or when dealing with heavier trikes, and pose challenges when navigating hills or curbs.
Innovation Solution
A reverse drive assembly is introduced, which includes a transmission case with a main shaft and counter shaft, along with gears and drive members, allowing the counter shaft to be driven in reverse through an engagement member that moves between disengaged and engaged positions, enabling the motorcycle to be propelled in reverse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a motorcycle is equipped with only a forward-driving transmission assembly, then the transmission structure remains simple, but the user experiences difficulty moving the motorcycle in reverse direction
Solution Approach 1:
The reverse drive assembly is segmented into distinct functional components: a reverse drive shaft, reverse gears, and an engagement mechanism with dog clutches. This segmentation allows the reverse drive function to be added as a separate module that can be engaged or disengaged independently from the forward drive system, resolving the contradiction by providing reverse capability without requiring complete redesign of the transmission structure.
Solution Approach 2:
The reverse drive assembly is nested within the existing transmission case, with the reverse drive shaft and gears positioned alongside the main shaft and forward drive gears. The engagement mechanism uses dog clutches that nest within the transmission assembly, allowing the reverse drive components to be integrated into the existing structure without requiring separate housing or complex external mechanisms.
2Weight of moving object
If the motorcycle is made larger and heavier (e.g., trike configuration), then the vehicle capacity and stability improve, but the user struggles to move it in reverse direction
Solution Approach 1:
The reverse drive assembly is powered by the engine through the main shaft, allowing the motorcycle to propel itself in reverse without requiring external human force. The engagement mechanism automatically connects the reverse drive shaft to the transmission system when the reverse gear is selected, enabling the vehicle to overcome its own weight and any additional load (such as trike configuration) without user physical effort.
3Ease of operation
If the user attempts to move the motorcycle up a hill or over a curb in reverse, then the user may achieve movement, but the required physical effort becomes excessive
Solution Approach 1:
The engine-powered reverse drive system provides sufficient torque to move the motorcycle against gravity when navigating hills or curbs in reverse. The transmission gears provide mechanical advantage, allowing the engine to generate the necessary force to overcome gravitational resistance without requiring the user to apply excessive physical effort to push or pull the vehicle.
4Adaptability or versatility
If a reverse drive mechanism is added to the transmission assembly, then reverse driving capability is achieved, but the transmission assembly complexity increases
Solution Approach 1:
The reverse drive assembly is designed as a separate functional module with its own drive shaft, gears, and engagement mechanism, distinct from the forward drive components. This segmentation allows the reverse drive function to be added without requiring complex integration with the existing transmission, as each module operates independently and can be engaged through a simple dog clutch mechanism.
Solution Approach 2:
The main shaft serves a dual function by being connected to both the forward drive gears and the reverse drive shaft through the engagement mechanism. The transmission case and housing accommodate both forward and reverse drive components, providing a universal structure that supports multiple driving directions without requiring separate dedicated systems for each function.
Data Source
AI summary
A reverse drive assembly for a motorcycle that includes a transmission assembly having a main shaft and a counter shaft. The reverse drive assembly includes a first drive member configured to be coupled to an opposite end of the main shaft, a second drive member configured to be coupled to a second end of the counter shaft, and an engagement member operatively positioned between the second drive member and the counter shaft. The engagement member is movable between a first position out of engagement with the second drive member and the counter shaft, and a second position in engagement between the second drive member and the counter shaft to drive the counter shaft in a reverse direction. In some constructions, the engagement member is operatively positioned between the first drive member and the main shaft.