Rotor Damper Stopper Layout for Wider Torsion Angle
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Solution Overview
Problem
Existing damper devices face challenges in enlarging the torsion angle between rotors due to overlapping radial positions of stopper holes and window holes, which hinders the elongation of stopper holes and restricts the effective attenuation of rotational fluctuations.
Innovation Solution
The damper device incorporates a stopper mechanism with elongated cutouts and stopper holes, featuring protruding portions on the rotors' accommodation portions, allowing for circumferential extension of cutouts and preventing radial overlap, thereby enabling a wider torsion angle and improved rotational fluctuation attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stopper holes are elongated circumferentially to enlarge the torsion angle, then the rotational fluctuation attenuation performance is improved, but the radial position overlap with window holes hinders the elongation
Solution Approach 1:
The patent introduces a third dimension (axial direction) by adding protruding portions that extend axially from the second rotor. This allows the stopper holes to be elongated circumferentially without radial overlap conflicts, as the protruding portions occupy the axial space rather than radial space. The stopper holes can now extend in the circumferential direction while the protruding portions prevent overlap with window holes through axial positioning.
Solution Approach 2:
The stopper mechanism is segmented into multiple components: stopper holes, protruding portions, and stop pins. The protruding portions are separated as distinct structural elements that serve to define the radial boundaries of the stopper holes. This segmentation allows the stopper holes to be elongated independently without directly conflicting with the window holes, as the protruding portions act as intermediate boundary elements.
2Adaptability or versatility
If the cutouts are elongated circumferentially to widen the torsion angle, then the damper performance is improved, but the radial position overlap with window holes restricts the elongation
Solution Approach 1:
The protruding portions extend in the axial dimension, allowing the cutouts to be elongated in the circumferential direction without radial overlap. By utilizing the axial dimension for the protruding portions, the patent enables greater circumferential elongation of the cutouts while maintaining clear radial separation from the window holes, thus widening the torsion angle without increasing device complexity.
3Reliability
If the torsion angle is enlarged to improve rotational fluctuation attenuation, then the damper performance is improved, but the stopper hole configuration must be changed to accommodate the larger angle
Solution Approach 1:
By adding the axial dimension through protruding portions, the patent enables the stopper holes to be elongated circumferentially to accommodate larger torsion angles. The protruding portions serve as axial boundaries that allow the stopper holes to extend further in the circumferential direction without radial overlap conflicts, thus enabling improved rotational fluctuation attenuation while maintaining manufacturability.
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 allows for a significant enlargement of the torsion angle between rotors, enhancing the damper device's performance in attenuating rotational fluctuations and preventing relative rotation, while maintaining even strength distribution across the rotors.
Implementation Method 1
The plurality of elastic members are accommodated in a plurality of pairs of the first and second accommodation portions. The plurality of elastic members elastically couple the first rotor and the second rotor in a rotational direction.
Data Source
AI summary
A damper device includes a first rotor, a second rotor, a plurality of elastic members and a stopper mechanism. The stopper mechanism includes a plurality of first cutouts, a plurality of second cutouts and a plurality of stop members. A pair of the first and second cutouts is provided on both circumferential sides of each of a plurality of accommodation portions of the second rotor so as to circumferentially extend therefrom. The stop members are fixed to the first rotor. Each stop member is circumferentially movable within the pair of the first and second cutouts. The second rotor includes a first protruding portion circumferentially protruding on one of a pair of pressing surfaces of each accommodation portion. Each of the first cutouts, which is a hole, extends at an end thereof located closer to each accommodation portion toward the first protruding portion.