Torsional Vibration Damper With Split Intermediate Elements
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Solution Overview
Problem
Existing torsional vibration dampers in automotive engineering face limitations due to complex manufacturing processes and manufacturing tolerances, leading to non-uniform support surfaces and reduced durability, which affect the movement and functionality of components.
Innovation Solution
A torsional vibration damper design featuring two-part intermediate elements arranged radially with cam mechanisms and a spring device between them, allowing for independent adaptation to vibration isolation and flexible construction, regardless of manufacturing methods, with the spring device positioned outside the torque path to enhance vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If intermediate elements are manufactured using a stamping process, then manufacturing efficiency is improved, but the support surface uniformity deteriorates leading to component lateral shifting
Solution Approach 1:
The intermediate element is divided into two separate element parts (first and second element parts) that are arranged axially one behind the other. This segmentation allows each part to be manufactured independently using stamping processes while maintaining uniform support surfaces, as the non-uniformities from stamping entry and exit affect each part separately rather than creating cumulative errors across a single complex component.
Solution Approach 2:
The solution transitions from a single intermediate element to multiple element parts arranged in the axial dimension. By distributing the torque-transferring function across multiple parts along the axial direction, the design accommodates manufacturing process limitations while maintaining overall functionality and support surface quality.
2Device complexity
If the spring device is arranged within the torque path between input part and output part, then compact design is achieved, but the spring device design is constrained by torque transmission requirements
Solution Approach 1:
The spring device is extracted from the torque path between the input part and output part. Instead of being positioned within the direct torque transmission path, the spring device is arranged to connect the intermediate elements in a location that allows it to focus on vibration isolation without being constrained by torque transmission geometry. This enables the spring device to be optimized independently for its damping function.
3Device complexity
If a single intermediate element is used, then the construction is simple, but the design flexibility and vibration damping capability are limited
Solution Approach 1:
The single intermediate element is segmented into multiple element parts (first and second element parts) that can be independently designed and positioned. This segmentation provides design flexibility in arranging the intermediate elements axially between the input and output parts, allowing optimization of both torque transmission and vibration damping characteristics while maintaining relatively simple construction.
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 provides a simple, flexible, and durable torsional vibration damper that is less dependent on manufacturing precision, offering improved vibration isolation and increased design flexibility while maintaining efficient torque transmission.
Implementation Method 1
the function of which is independent of manufacturing tolerances. The torsional vibration damper according to the disclosure, e.g., for a clutch disk within a drive train of a motor vehicle, includes an input part which is mounted about a rotational axis and an output part Which can rotate about the rotational axis to a limited extent relative to the input part against the action of a spring device
Implementation Method 2
The spring device has at least one spring as an energy store, e.g., two springs, which are connected to the two intermediate elements
Implementation Method 3
at least two torque-transferring intermediate elements which are arranged between the input part and the output part and which are arranged so as to be forcibly displaced in a radial direction by means of cam mechanisms in the event of a relative rotation between the input part and the output part
Implementation Method 4
The intermediate elements (33) have rolling elements (13, 17) which are guided by ramp devices (11-15)
Data Source
AI summary
A torsional vibration damper includes a rotational axis, an input part mounted about the rotational axis, an output part rotatable about the rotational axis to a limited extent relative to the input part; a spring device opposing rotation of the output part relative to the input part, a first cam mechanism, and a first intermediate element. The first intermediate element is arranged for radial displacement by the first cam mechanism when the output part rotates relative to the input part. The first intermediate element has a first intermediate element first part, and a first intermediate element second part. In an example embodiment, the damper includes a second cam mechanism and a second intermediate element arranged to be radially displaced by the second cam mechanism when the output part rotates relative to the input part. The spring device is arranged between the first intermediate element and the second intermediate element.