Motorcycle Shifting Assistance Locking Mechanism
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Solution Overview
Problem
Existing transmission shifting assistance devices for motorcycles require stiff compression springs for precise neutral finding, leading to uncomfortable shifting forces for riders due to the high forces needed to engage neutral and shift gears.
Innovation Solution
A locking device is introduced to fix the piston in a neutral position until a predefined unlocking force is exceeded, allowing the transmission shifting assistance device to respond, enabling softer compression springs and reducing shifting forces while maintaining precise neutral finding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If stiff compression springs are used for precise neutral finding, then neutral engagement precision is improved, but shifting force comfort deteriorates
Solution Approach 1:
The system is segmented into two functional parts: a locking device for neutral position detection and compression springs for gear shifting. The locking device handles the precise neutral finding function while the softer springs handle the gear shifting function, allowing each component to be optimized independently for its specific purpose.
Solution Approach 2:
The locking device acts as an intermediary mechanism between the rider's input and the transmission. It mediates the neutral finding process by providing mechanical feedback through a locking element that engages with a locking recess, allowing the system to detect neutral position without requiring high spring forces.
2Reliability
If stiff compression springs are used to ensure reliable neutral finding, then neutral engagement reliability is improved, but the force required for gear shifting increases
Solution Approach 1:
The system separates the neutral finding function from the gear shifting function. The locking device with its locking element and recess provides reliable neutral detection through mechanical engagement, while the compression springs are freed from this constraint and can be optimized for comfortable gear shifting with lower forces.
Solution Approach 2:
The locking device performs the neutral finding action preliminarily and independently before gear shifting occurs. The locking element engages with the locking recess to confirm neutral position, and only after this preliminary action is complete does the system allow gear shifting to proceed with softer spring forces.
3Ease of operation
If the compression spring is made softer to reduce shifting forces, then riding comfort is improved, but neutral finding precision deteriorates
Solution Approach 1:
The system divides functionality so that the locking device handles precision neutral detection while the softer compression springs handle comfort-oriented gear shifting. This segmentation allows the springs to be soft for comfort while the locking device provides precise mechanical feedback for neutral detection.
Solution Approach 2:
The patent replaces the spring-based neutral finding mechanism with a mechanical locking system. Instead of relying on spring force for neutral detection, the system uses a locking element and locking recess that provide precise mechanical feedback when neutral is achieved, allowing softer springs to be used without compromising detection precision.
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
The solution provides increased riding comfort by reducing the forces required for gear shifting without compromising precise neutral engagement, as the locking device ensures reliable neutral finding and allows softer compression springs to be used.
Implementation Method 1
at least one compression spring which is provided in the housing, the piston being displaceable relative to the housing with the compression of at least one compression spring
Implementation Method 2
The locking device has a locking spring and a locking element which is loaded by the locking spring
Data Source
AI summary
A transmission shifting assistance device, in particular for a motorcycle, which allows shifting when the clutch is closed, includes a housing, a piston arranged in the housing, and at least one pressure spring provided in the housing. The piston may be moved relative to the housing by compressing at least one pressure spring. Furthermore, transmission shifting assistance device further includes a locking device separate from the at least one pressure spring. The locking device fixes the piston in a neutral position relative to the housing below a predetermined unlocking force exerted on the piston or the housing.