Motorcycle Clutch Spring Sequencing for Smooth Power Transmission
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Solution Overview
Problem
Existing power transmission devices for motorcycles experience a dead zone and surprise feeling during power transmission due to a significant difference in loads between the release spring and clutch spring, affecting operability.
Innovation Solution
Incorporating a cushioning member with a spring set to a load that compresses before the clutch spring, ensuring continuous compression of both the release spring and clutch spring, thereby eliminating the dead zone and improving operability by smoothing the engagement process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the set load of the clutch spring is set larger than the maximum load of the release spring, then the clutch spring can effectively press the clutch plates together, but a dead zone occurs where the interlocking member stops moving, causing a surprise feeling when power is transmitted
Solution Approach 1:
The patent changes the load parameter of the clutch spring by setting its set load smaller than the maximum load of the release spring. This parameter adjustment ensures that the clutch spring compresses before the release spring reaches its maximum load, eliminating the dead zone and preventing the surprise feeling during power transmission while maintaining reliable clutch engagement.
Solution Approach 2:
The patent creates a dynamic interaction between the release spring and clutch spring where both springs compress continuously during the engagement process. The clutch spring is designed to compress first, then the release spring continues compressing, creating a smooth transition without stopping points. This dynamic coordination eliminates the dead zone where the interlocking member would otherwise stop moving.
2Force
If the difference between the maximum load of the release spring and the set load of the clutch spring is large, then the release spring can provide sufficient urging force, but a dead zone occurs where movement stops, affecting operability
Solution Approach 1:
The patent optimizes the load parameters by setting the clutch spring's set load smaller than the release spring's maximum load. This parameter configuration ensures that the clutch spring begins compressing while the release spring is still within its elastic range, maintaining sufficient urging force while preventing the dead zone and ensuring smooth power transmission.
3Strength
If the clutch spring compresses after the release spring reaches maximum load, then the engagement force is strong, but the interlocking member stops moving creating a dead zone
Solution Approach 1:
The patent implements preliminary action by designing the clutch spring to compress before the release spring reaches its maximum load. This sequencing ensures that the clutch spring is already compressed and ready to provide press-contact force before the release spring fully engages, eliminating the dead zone and preventing any loss of time during the engagement process.
Solution Approach 2:
The patent ensures continuous useful action by coordinating the compression of both springs so that there is no interruption in the movement of the interlocking member. The clutch spring compresses first, then the release spring continues compressing, maintaining continuous motion and eliminating the dead zone where the interlocking member would otherwise stop, thus eliminating time loss.
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 effectively suppresses the surprise feeling during power transmission and enhances operability by ensuring continuous movement and reduced dead zones through the controlled compression of springs.
Implementation Method 1
The weight member is movable from a radially-inner position to a radially-outer position in the groove portion due to a centrifugal force generated by rotation of the clutch housing
Implementation Method 2
The release spring applies an urging force while allowing movements of the interlocking member and the pressure member until the drive-side clutch plates and the driven-side clutch plates reach an engaged state
Implementation Method 3
The clutch spring applies a press-contact force between the drive-side clutch plate and the driven-side clutch plate while allowing movement of the interlocking member
Data Source
AI summary
A power transmission device has an interlocking member 9 moving a pressure member 5 from an inactive position to an active position. A release spring (m) applies an urging force, while allowing movements of the interlocking member 9 and the pressure member 5, until drive-side clutch plates 6 and driven-side clutch plates 7 reach an engaged state before the drive-side clutch plates 6 and the driven-side clutch plates 7 are pressed against each other. A clutch spring 11 is compressed in a process where the interlocking member 9 moves after the drive-side clutch plates 6 and the driven-side clutch plates 7 have reached the engaged state. The clutch spring applying a press-contact force between the drive-side clutch plates 6 and the driven-side clutch plates 7 while allowing movements of the interlocking member 9 and the pressure member 5. The set load of the clutch spring 11 is set to be smaller than the maximum load of the release spring (m).