Torsional Damper Phasing Structure for Compact Vibration Filtering
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Solution Overview
Problem
Existing torsion damping devices for motor vehicle transmission systems have complex structures, which complicates their design and manufacturing, making them less economical and efficient in filtering vibrations.
Innovation Solution
A compact torsion damping device with a first and second movable element in rotation about an axis X, featuring at least one group of elastic members and a phasing member that allows the elastic members to deform in phase, integrated into a transmission assembly that includes a flywheel, friction disc, or torque converter, with a sealed space and localized rigidity enhancements for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a torsional damping device uses multiple groups of elastic elements connected in series via a phasing element arranged radially outside the shell, then the elastic elements can deform in phase to filter vibrations, but the structure becomes complex and less economical
Solution Approach 1:
The patent integrates the phasing element directly into the shell structure, merging two separate components (phasing element and shell) into one unified structure. This eliminates the need for separate phasing washers or external phasing mechanisms, thereby simplifying the overall device structure while maintaining the phase deformation capability of elastic elements for effective vibration filtering
Solution Approach 2:
The patent nests the phasing element within the shell structure, placing it in an internal position rather than arranging it radially outside. This nested configuration allows the phasing element to be housed within the existing shell boundaries, reducing the radial footprint and eliminating external mounting requirements, thus simplifying the device structure while preserving vibration damping functionality
2Reliability
If the phasing element is arranged radially outside the shell, then the elastic elements can be arranged in series, but the device occupies more radial space
Solution Approach 1:
The patent repositions the phasing element from a radial arrangement outside the shell to an axial arrangement within the shell structure. This dimensional shift moves the phasing element along the axial direction rather than radially outward, allowing it to maintain series connection of elastic elements while occupying minimal radial space and fitting within the existing radial boundaries of the damping device
3Device complexity
If the damping device uses a compact radial design, then the device becomes more economical and easier to integrate, but the structure becomes more constrained
Solution Approach 1:
The patent segments the shell structure into distinct functional zones, including separate regions for housing the phasing element, accommodating elastic elements, and providing mounting interfaces. This segmentation allows each zone to be optimized independently for its specific function while maintaining overall radial compactness, and facilitates modular manufacturing and assembly processes
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 provides a simpler, more economical, and effective vibration damping solution by ensuring the elastic members deform in phase, distributing forces homogeneously and maintaining a compact radial design, thus enhancing the transmission system's efficiency and stability.
Implementation Method 1
at least one group of elastic elements mounted between the first element and the second element and acting against the rotation of the first element and the second element relative to each other
Implementation Method 2
the torsional damping device can be integrated into a transmission assembly including a friction clutch capable of selectively connecting the internal combustion engine to the gearbox, in order to filter vibrations due to engine irregularities
Implementation Method 3
a phasing element, movable in rotation about the X axis and formed by a first part and a second part, to arrange the elastic elements of this group in series so that the elastic elements of each group deform in phase with each other
Implementation Method 4
the device comprises a pendulum damper including a pendulum support member capable of rotating around the axis of rotation on which at least one weight is mounted movably
Implementation Method 5
the torsional damping device can be integrated into a transmission assembly including a friction clutch capable of selectively connecting the internal combustion engine to the gearbox
Data Source
Figure 1
Figure 2
Figure 3a~4b
AI summary
The invention relates to a vibration damping device (330) for a motor vehicle, comprising: - a first movable element (13,14) and a second movable element (15,16) rotating about an axis X, capable of transmitting a torque, - at least one group of elastic elements (25,26) mounted between the first element and the second element and acting against the rotation of the first element and the second element relative to each other, - a phasing element (32,33), movable in rotation about the axis X and formed by a first part (32) and a second part (33), for arranging the elastic elements of this group in series so that the elastic elements of each group deform in phase with each other.