Clutch Spring Load Tuning to Eliminate Power Transmission Dead Zones
Find Innovative SolutionsGenerate Solutions
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
1Force
If the set load of the clutch spring is set larger than the maximum load of the release spring, then the clutch spring can provide sufficient pressing force, but a dead zone occurs where the interlocking member stops moving, causing a surprise feeling during power transmission
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 continuously with the release spring during the interlocking member's movement, eliminating the dead zone and preventing the surprise feeling during power transmission while still providing sufficient pressing force.
2Adaptability or versatility
If the difference between the maximum load of the release spring and the set load of the clutch spring is large, then the springs can be designed with different characteristics, but a dead zone occurs where power transmission is delayed
Solution Approach 1:
The patent ensures continuous compression action of both springs by setting the clutch spring's set load smaller than the release spring's maximum load. This creates an overlapping load range where both springs are compressed simultaneously, eliminating the dead zone and ensuring continuous power transmission without delays.
3Stability of the object's composition
If the clutch spring is set to engage after the release spring finishes compression, then the engagement sequence is clear, but a dead zone occurs affecting operability
Solution Approach 1:
The patent applies preliminary action by setting the clutch spring's set load smaller than the release spring's maximum load, causing the clutch spring to start compressing before the release spring finishes compression. This preliminary compression action eliminates the dead zone and improves operability while maintaining a clear engagement sequence through controlled spring compression timing.
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 plate and the driven-side clutch plate reach an engaged state before being pressed against each other
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).