Torque Damper Clutch Piston Rotational Strength
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Solution Overview
Problem
The notch-anchored design for guide sheets in clutch pistons of torque converters reduces the rigidity and strength of the clutch piston during rotation, leading to inefficiencies in torque transmission.
Innovation Solution
The guide sheets are anchored to the damper holders instead of the clutch piston, eliminating the need for a notch and enhancing the rotational strength by securing them immovably in the circumferential direction, while still providing wear resistance and guiding the damper springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If guide sheets are anchored to the clutch piston by inserting them into a notch formed in the clutch piston wall, then the guide sheets are secured immovably in the circumferential direction, but the rigidity and strength of the clutch piston during rotation are substantially reduced
Solution Approach 1:
The clutch piston is divided into multiple radial partitions that extend from the center toward the outer circumference. These partitions create separate circumferential regions for guiding damper springs while maintaining the overall structural integrity of the clutch piston, eliminating the need for a single large notch that would compromise strength.
Solution Approach 2:
Radial partitions are introduced as intermediary structures between the clutch piston body and the damper springs. These partitions serve as guide surfaces for the damper springs while being integrated into the clutch piston structure, providing guidance functionality without requiring separate anchored guide sheets that would create notches.
2Reliability
If guide sheets are anchored to the clutch piston, then wear resistance is provided between the clutch piston and damper springs, but the structural complexity increases due to the notch and anchoring mechanism
Solution Approach 1:
The guide function and the structural support function are merged into the radial partitions that are an integral part of the clutch piston. The partitions directly guide the damper springs while maintaining piston integrity, eliminating the need for separate guide sheet components and their anchoring mechanisms.
Solution Approach 2:
The clutch piston structure itself provides the guidance function through its radial partitions, rather than requiring separate guide sheets. The partitions are formed as part of the piston manufacturing process, making the system self-sufficient and reducing overall component complexity.
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 design enhances the rotational strength of the clutch piston and reduces torque variations during transmission, maintaining effective wear resistance and preventing circumferential movement of the damper springs, thus improving torque transmission efficiency.
Implementation Method 1
Damper springs arranged on the clutch piston for absorbing torque variations from an engine in the connected condition of the torque damper
Implementation Method 2
guide sheets having wear resistance are arranged between the circumference of the clutch piston and the damper springs to reduce wear of the springs during their expansion and contraction
Data Source
AI summary
A torque damper can comprise a clutch piston arranged within a cover of a torque converter and can be adapted to be moved between a connected position and a non-connected position relative to the cover. Damper springs can be arranged along the circumference of the clutch piston. Connecting members can be arranged abutting against one end of the damper spring and adapted to connect a turbine arranged within the cover and the clutch piston via the damper spring. Damper holders can be arranged abutting against the other end of the damper spring and adapted to hold the damper spring against the compressive force applied to the damper spring from the connecting member. Guide sheets having wear resistance can be interposed between the circumference of the clutch piston and the damper spring and can be adapted to guide the damper spring. A torque input to the cover can be transmitted to the turbine via the clutch piston and the damper springs when the clutch piston is in the connected position. The guide sheets can be anchored to the damper holders and secured thereto immovably in the circumferential direction of the clutch piston.