Axially Offset Pendular Flyweights for Torsion Damping
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Solution Overview
Problem
Existing torsion damping devices in automotive temporary coupling systems face limitations in the mass and efficiency of pendulum flyweights due to dimensional constraints, which affect the overall damping performance.
Innovation Solution
The support element of the pendulum flyweights is axially offset relative to the guide washers, allowing for a greater mass and efficiency of the flyweights without increasing the radial dimension, thereby enhancing the damping performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the radial dimension of pendulum flyweights is limited to maintain installation diameter, then the installation diameter is reduced, but the mass and efficiency of pendulum flyweights decrease
Solution Approach 1:
The patent transitions the pendulum flyweight arrangement from a radial configuration to an axial configuration. Instead of positioning flyweights radially above the first damping means (which limited their mass due to radial space constraints), the flyweights are now positioned axially offset relative to guide washers. This dimensional change allows greater mass and efficiency of pendulum flyweights without increasing the installation diameter, as the axial direction provides additional space for mass increase.
2Reliability
If the mass of pendulum flyweights is increased to improve damping efficiency, then the damping performance is improved, but the radial dimension and installation diameter increase
Solution Approach 1:
The patent resolves this contradiction by changing the spatial arrangement from radial to axial. The support element carrying pendulum flyweights is offset axially relative to guide washers, allowing the flyweights to be positioned in the axial direction rather than radial direction. This enables increased mass for better damping performance without expanding the radial installation diameter.
3Weight of moving object
If the axial offset of support element is increased to accommodate heavier flyweights, then the mass of flyweights increases, but the axial dimension of the device increases
Solution Approach 1:
The patent employs asymmetric positioning where the support element is offset axially on the same side with respect to the peripheral portions of guide washers, rather than symmetric positioning. This asymmetric axial offset allows the pendulum flyweights to be positioned to maximize their mass and efficiency while better utilizing the available axial space, achieving heavier flyweights with minimized axial dimension increase.
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 enables increased mass and efficiency of the pendulum flyweights, improving the damping performance of the torsion damping device without increasing the device's axial dimension, leading to better vibration attenuation and reduced noise.
Implementation Method 1
the radial position of the center of gravity of each pendulum mass with respect to the rotation axis of the engine shaft, as well as the distance of said center of gravity with respect to the notional oscillation axis, are established so that in response to centrifugal forces, the oscillation frequency of each of the pendulum masses is proportional to the rotation speed of the engine shaft
Implementation Method 2
at least one pendulum flyweight that is mounted oscillatingly in a radial plane on a support element that is rotationally integral with the phase washer
Implementation Method 3
at least two circumferentially acting elastic members that are interposed circumferentially in series between the input element and the output element
Data Source
AI summary
A torsion damping device (10) equipped with first torsion damping system that comprise a radial phase washer (38) and two guide washers (20A, 20B) and elastic members (36); the damping device being equipped with second torsion 5 damping system that have two pendulum flyweights (54A, 54B) that are mounted oscillatingly on a support element (56) that is rotationally integral with the phase washer (38); wherein the support element (56) is offset axially with respect to the guide washers (20A, 20B) in such a way that the two pendulum flyweights (54A, 54B) are offset axially on the same side with respect to the two guide washers (20A, 20B).