Overrunning Decoupler Integrating Torsional Isolation and Vibration Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing over-running decouplers lack torsional isolation capabilities, which are essential for effective vibration damping and rotational imbalance management.
Innovation Solution
A decoupler design incorporating a one-way clutch with a torsional isolator, featuring a clutch spring and isolating springs that transmit torque in a predetermined rotational direction, allowing for rotational imbalance adjustment based on torsional load, thereby providing both torsional isolation and vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing over-running decouplers are used, then over-running capability is provided, but torsional isolation capability is lacking
Solution Approach 1:
The patent combines a one-way clutch mechanism with a torsional isolator into a single integrated decoupler assembly. The one-way clutch provides over-running capability while the torsional isolator with vibration damping elements provides torsional isolation and vibration attenuation, allowing both functions to coexist in one device.
Solution Approach 2:
The decoupler is designed to perform multiple functions simultaneously: over-running decoupling via the one-way clutch, torsional isolation via the isolator springs, and vibration damping via the damping elements. This multi-functional design addresses the versatility deficiency of existing single-function decouplers.
2Volume of moving object
If a compact decoupler design is implemented, then device size is reduced, but vibration damping capability may be compromised
Solution Approach 1:
The torsional isolator and vibration damping elements are nested within the compact decoupler housing, with the isolator springs and damping elements arranged concentrically and in series to maximize space utilization. This nested arrangement provides comprehensive vibration control within a minimized footprint.
Solution Approach 2:
The patent employs a multi-dimensional arrangement of damping elements and isolator springs in series and concentric configurations, utilizing radial, axial, and circumferential dimensions to achieve effective vibration damping within a compact volume.
3Stability of the object's composition
If rotational imbalance is reduced through design, then operational stability is improved, but device complexity increases
Solution Approach 1:
The patent incorporates balancing weights or counterbalancing elements within the decoupler assembly that are positioned to offset rotational imbalance forces. These counterweights are integrated into the existing structure rather than added as separate complex balancing mechanisms.
Solution Approach 2:
The decoupler employs asymmetric positioning of damping elements and isolator components to naturally counteract rotational imbalance, utilizing strategic placement rather than symmetric arrangements that would require additional balancing complexity.
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 decoupler effectively reduces rotational imbalance and attenuates torsional vibrations, enabling a more compact and cost-effective design with improved spring configurations and vibration damping capabilities.
Implementation Method 1
The coils of the clutch spring are configured to expand against the clutch surface to transmit rotary power from the input hub to the clutch output structure in a first rotational direction
Implementation Method 2
at least one spring that is configured to transmit torque in the first rotational direction between the input driver and the output driver
Implementation Method 3
The at least one spring of the torsional isolator is disposed radially outwardly of the clutch spring
Data Source
AI summary
A decoupler having an input hub, an output member, a one-way clutch, and at least one isolation spring. Rotary power is transmitted in a predetermined rotational direction from the input hub, through the one-way clutch, through the isolation spring and to the output member. A method for forming a decoupler is also provided.