Multi-Plate Clutch Disc Spring Layout for Torque Vibration Control
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Solution Overview
Problem
Existing clutch devices with a disc spring located far from the pressure plate fail to effectively attenuate pressing force, leading to a rapid increase in assist torque and clutch vibrations, especially in clutch devices with a large number of rotating plates.
Innovation Solution
The disc spring is positioned closer to the pressure plate, between adjacent output-side rotating plates, to attenuate the pressing force generated by assist cam surfaces, reducing rapid torque increases and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the disc spring is located far from the pressure plate, then the clutch device structure is simpler, but the pressing force cannot be effectively attenuated, causing rapid torque increase and vibrations
Solution Approach 1:
The patent changes the spatial arrangement of the disc spring from a radial position to an axial position between rotating plates. This dimensional change allows the spring to be closer to the pressure plate in the axial direction, improving pressing force attenuation without complicating the overall structure.
Solution Approach 2:
The disc spring acts as an intermediary element placed between adjacent rotating plates. This intermediate positioning allows it to effectively modulate the pressing force transmitted through the plate stack, attenuating rapid force changes before they reach the pressure plate.
2Power
If a large number of rotating plates are used, then the power transmission capability is improved, but the pressing force attenuation becomes less effective with the existing disc spring position
Solution Approach 1:
The patent applies local quality by placing the disc spring at a specific location between adjacent rotating plates rather than using a uniform distribution. This localized positioning creates an effective attenuation point that works efficiently regardless of the total number of plates in the stack.
3Reliability
If the disc spring is repositioned closer to the pressure plate, then pressing force attenuation is improved, but the device complexity increases
Solution Approach 1:
The disc spring serves multiple functions: it provides pressing force attenuation, acts as a spacing element between rotating plates, and maintains structural integrity. This multi-functionality reduces the need for additional components, keeping the device complexity low while achieving effective attenuation.
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 attenuates pressing force, preventing rapid torque increases and clutch vibrations, enhancing clutch performance.
Implementation Method 1
The clutch center includes a center-side cam portion including a center-side assist cam surface to generate a force in a direction so as to move the pressure plate toward the clutch center... The pressure plate includes a pressure-side cam portion including a pressure-side assist cam surface to generate a force in a direction so as to move the pressure plate toward the clutch center
Implementation Method 2
a disc spring held by the clutch center... is contactable with the output-side rotating plates held by the clutch center... The disc spring attenuates the pressing force in order to suppress a rapid increase in an assist torque
Data Source
AI summary
A clutch device includes a clutch center, a pressure plate movable toward and away from and rotatable with respect to the clutch center, and a disc spring held by the clutch center. The disc spring is contactable with output-side rotating plates held by the clutch center, is located between two output-side rotating plates adjacent to each other in a direction among the output-side rotating plates held by the clutch center, and is located on the side of a second direction with respect to a center in the direction from a first output-side rotating plate located farthest in a first direction among the output-side rotating plates held by the clutch center to a second output-side rotating plate located farthest in the second direction among the output-side rotating plates held by the clutch center.