Torque Converter Lock-Up Damper Stopper Retention Structure
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Solution Overview
Problem
The stopper mechanism in existing lock-up devices for torque converters can come off when the input and output members are relatively separated in the axial direction, leading to ineffective regulation of the twisting angle.
Innovation Solution
A lock-up device design where the output member is sandwiched between the input and support members, forming a stopper mechanism that prevents relative rotation by a predetermined angle, utilizing a support member with an annular part for positioning and a stopper part to maintain axial immovability, thereby preventing the stopper mechanism from disengaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a stopper mechanism is provided between the elastic member and the outer peripheral part of the turbine shell or between the input side plate and output side plate, then the relative rotation angle (twisting angle) can be regulated within a predetermined angle range, but the stopper mechanism may come off when the input member and output member are relatively separated in the axial direction
Solution Approach 1:
The stopper mechanism is nested within the damper part structure, specifically positioned between the input member and output member in the axial direction. The stopper protrusion fits into the stopper groove, creating a nested configuration that prevents the stopper from coming off while maintaining twisting angle regulation functionality.
Solution Approach 2:
The stopper mechanism is designed to operate in the axial direction rather than only in the radial or circumferential directions. By providing the stopper protrusion and groove in the axial direction between the input member and output member, the mechanism prevents disengagement while maintaining the twisting angle control function.
2Manufacturing precision
If the stopper mechanism is composed of a stopper claw and hole in the input side plate and output side plate, then the twisting angle can be regulated, but the stopper mechanism may come off when the plates are relatively separated in the axial direction
Solution Approach 1:
The stopper protrusion is nested within the stopper groove formed on the inner peripheral surface of the output member. This nested configuration ensures that the stopper mechanism remains retained between the input member and output member in the axial direction, preventing disengagement while maintaining twisting angle regulation.
Solution Approach 2:
The stopper mechanism is segmented into distinct components: the stopper protrusion on the input member and the stopper groove on the output member. This segmentation allows for independent positioning and function of each component while working together to prevent axial separation and maintain twisting angle control.
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 configuration reliably prevents the stopper mechanism from coming off, ensuring consistent regulation of the twisting angle and maintaining the lock-up device's functionality.
Implementation Method 1
The elastic members elastically connect the input member and the output member in a rotational direction
Implementation Method 2
absorbs and damps torsional vibration
Data Source
AI summary
A lock-up device includes a clutch part and a damper part. The clutch part is disposed between a front cover and a turbine, and transmits or blocks torque. The damper part transmits torque from the clutch part to the turbine, and absorbs torsional vibration. The damper part includes input and output members, elastic members, and a support member. The input member is connected to the clutch part. The output member is connected to the turbine. The elastic members connect the input and output members. The support member has a connecting part, a regulating part, and a stopper part. The regulating part is provided such that the output member is interposed axially between the regulating part and part of the input member. The stopper part is configured to contact the output member and prohibit the input and output members from rotating relative to each other by a predetermined angle or more.