Motorcycle Transmission Locking Mechanism With Safe Intermediate Engagement
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Solution Overview
Problem
Existing motorcycle transmissions lack a safe and reliable mechanism for actuating the locking device to prevent unintended locking during operation, which can lead to excessive loads and damage.
Innovation Solution
A transmission system with a safety device that includes a deflector face on the locking elements, allowing the second locking element to move into an intermediate position instead of a locked position when the shaft rotates at excessive speed, and a spring element to facilitate movement back to the released position, ensuring the locking elements do not engage improperly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the actuating device is actuated to move the second locking element into the locked position, then the shaft is secured against rotation, but unintended locking can occur during operation leading to excessive loads and damage
Solution Approach 1:
The deflector face is pre-configured on the first locking element to automatically deflect the second locking element if the shaft is rotating when locking is attempted. This preliminary geometric arrangement prevents unintended locking before it can occur, allowing the locking mechanism to safely detect and respond to rotation conditions.
Solution Approach 2:
The deflector face acts as an intermediary element between the two locking elements. When the shaft is rotating, the deflector face intervenes to prevent the second locking element from engaging with the first locking element, thereby mediating the interaction and preventing harmful unintended locking during operation.
2Device complexity
If the second locking element is moved directly from released position to locked position, then the locking mechanism is simple, but it cannot provide an intermediate state to prevent improper engagement
Solution Approach 1:
The locking path is segmented into distinct positions: released position, intermediate position, and locked position. The intermediate position serves as a safety state where the locking elements are close but not yet engaged, allowing the deflector face to prevent improper engagement while maintaining a relatively simple overall mechanism structure.
3Strength
If the locking elements are designed to engage directly without deflection, then the locking is firm and reliable, but rotation during actuation causes excessive loads and potential damage
Solution Approach 1:
The deflector face provides preliminary anti-action by preventing the second locking element from engaging with the first locking element when the shaft is rotating. This counteracts the potential harmful effect of rotation during locking, eliminating excessive loads and potential damage before they can occur.
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
This solution prevents sudden and undesired locking of the shaft, ensuring safe operation and avoiding excessive loads on the transmission, thereby reducing the risk of damage during motorcycle use.
Implementation Method 1
a spring element, via which the second locking element is supported on the actuating element along the movement direction
Data Source
AI summary
A transmission for a motorcycle includes a housing; at least one shaft at least partially accommodated in the housing, a locking device which has at least one first locking element which can be rotated with the shaft and at least one second locking element which can be moved relative to the housing, relative to the shaft, and relative to the first locking element. The second locking element can move between at least one release position in which the locking elements do not engage in one another and the shaft is released for rotation, and at least one locking position in which the locking elements engage in one another to secure the shaft against rotation relative to the housing. The transmission further includes an actuating device configured to move the second locking element out of the release position into the locking position via at least one intermediate position.