Vibration Damper with Decoupling Ring for Drivetrain
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Solution Overview
Problem
Existing vibration dampers in drive shafts do not effectively manage peak torques and torsional vibrations, leading to inefficiencies in torque transmission and vibration absorption.
Innovation Solution
A decoupling ring with recesses and rotation limiting rings is introduced, arranged axially between the rotation limiting rings, featuring coordinated pocket formations and alternating negative profiles and recesses on the outer and inner faces to enhance damping and torque filtering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration damper is arranged between connecting components of a drive shaft, then torsional vibrations and peak torques are absorbed, but the device complexity increases due to additional components such as decoupling rings with recesses and rotation limiting rings
Solution Approach 1:
The vibration damper is segmented into multiple functional rings: a decoupling ring with recesses for absorbing peak torques, rotation limiting rings with negative profiles for limiting rotational movement, and damping elements. Each segment performs a specific function, allowing the system to handle different aspects of vibration and torque management independently, thereby improving overall reliability while maintaining manageable complexity through modular design
Solution Approach 2:
The damping components are nested within each other axially along the longitudinal axis of the drive shaft. The decoupling ring with recesses is positioned between the rotation limiting rings, creating a compact nested structure. This nesting approach allows multiple functional elements to be integrated in a space-efficient manner, reducing the overall axial length while maintaining the complexity of multiple damping mechanisms
2Reliability
If decoupling rings with recesses and rotation limiting rings are added to the vibration damper, then damping properties and torque filtering are enhanced, but the manufacturing complexity increases
Solution Approach 1:
The decoupling ring features recesses at specific locations along its circumference, creating local variations in geometry that enable peak torque absorption at critical points. The rotation limiting rings have negative profiles positioned at specific locations to engage with corresponding positive profiles on the drive shaft. This local quality approach allows the damping functionality to be concentrated where most needed, improving damping properties while simplifying manufacturing by avoiding complex geometry throughout the entire component
Solution Approach 2:
The damping components are designed with dynamic engagement characteristics where the recesses and negative profiles engage with positive profiles only under specific loading conditions. During normal operation, the components maintain a controlled clearance, but during peak torque events or torsional vibrations, the recesses and negative profiles engage to provide damping action. This dynamic behavior enhances damping properties while allowing simpler manufacturing compared to continuously engaged complex mechanisms
3Volume of moving object
If the decoupling ring is arranged axially between rotation limiting rings, then the structure becomes more compact, but the assembly precision requirements increase
Solution Approach 1:
The decoupling ring with recesses is positioned axially between the rotation limiting rings with predetermined clearances and tolerances built into the design. These pre-established dimensional relationships provide a cushioning effect that accommodates normal manufacturing variations without requiring extremely tight precision. The recesses and negative profiles are designed with sufficient depth and width to engage effectively even with moderate positioning variations, thereby achieving compact axial length while maintaining reasonable assembly precision requirements
Solution Approach 2:
The decoupling ring features asymmetric recesses that are deeper or more pronounced on one side compared to the other, allowing the ring to preferentially engage with the rotation limiting rings in a specific axial orientation. This asymmetric design provides self-aligning characteristics during assembly, reducing the precision required for axial positioning by allowing the components to naturally settle into the correct relative positions through the asymmetric engagement geometry
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 filters peak torques and torsional vibrations by converting them into heat, improving damping properties and torque transmission efficiency in drive shafts, suitable for use in motor vehicle drive trains.
Implementation Method 1
peak torques, which occur, for example, in the case of jerks in the drive, torsional vibrations and the like, are filtered, in that the peak torques give rise to a temporary storage buffer and/or an elimination by conversion into heat in the damping part
Implementation Method 2
this damping part is configured so as to be elastic; and/or this damping part contains elastic elements
Implementation Method 3
this damping part is configured so as to be elastic; and/or this damping part contains elastic elements
Data Source
AI summary
A vibration damper and a drive shaft comprising a vibration damper having a small radial extent is provided. A first shaft part is provided with a sleeve and a second shaft part is provided with an inner part which extends axially into the sleeve. The sleeve and the inner part include longitudinal rotary drivers that engage negative profiles of an damping part which is elastically deformable in the direction of shaft rotation and includes at least one decoupling ring and at least one pair of rotation limiting rings.