Serialized Damper Structure With Hysteresis Torque Compatibility
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Solution Overview
Problem
The hysteresis generating mechanism used in parallel-type damper devices is incompatible with serialized-type damper devices, as the intermediate plate required in serialized designs conflicts with the hysteresis generating mechanism's configuration.
Innovation Solution
A damper device design that includes a first rotor, a second rotor, elastic members, and an intermediate member with an annular portion and support portions that actuate adjacent elastic members in series, allowing the hysteresis generating mechanism to be disposed axially between the rotors, thus making the mechanism compatible with both parallel and serialized types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If an intermediate plate is disposed axially between the input rotor and the output rotor to actuate springs in series, then the maximum torsion angle is increased, but the hysteresis generating mechanism becomes incompatible with the serialized configuration
Solution Approach 1:
The intermediate member is divided into a first intermediate plate and a second intermediate plate positioned at different axial locations. The first intermediate plate actsuates springs in series to increase torsion angle, while the second intermediate plate provides a mounting surface for the hysteresis generating mechanism, thus segmenting the functions to resolve the compatibility issue.
Solution Approach 2:
The second intermediate plate acts as an intermediary component that bridges the hysteresis generating mechanism to the rotor assembly. It provides an axial mounting position for the hysteresis generating mechanism without interfering with the series actuation of springs by the first intermediate plate, enabling both functions to coexist.
2Reliability
If the hysteresis generating mechanism is provided axially between the flange of the output rotor and the plates composing the input rotor in a parallel-type damper device, then the mechanism works effectively, but it cannot be applied to serialized-type damper devices
Solution Approach 1:
The intermediate member is designed with dual functionality: the first intermediate plate enables series spring actuation for increased torsion angle, while the second intermediate plate provides mounting for the hysteresis generating mechanism. This multi-functional design makes the hysteresis generating mechanism adaptable to both parallel and serialized damper configurations.
3Length of moving object
If an intermediate member is provided to actuate elastic members in series, then the torsion angle increases, but the axial space between rotors is reduced
Solution Approach 1:
The intermediate member utilizes the radial dimension by extending radially inward from the rotor flange to engage with the springs. This radial extension allows the intermediate member to actuate springs in series and provide mounting for the hysteresis generating mechanism without significantly reducing the axial space between rotors, as the primary structural occupation is in the radial direction.
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 increases the torsion angle, effectively attenuating vibrations caused by torque fluctuations and enabling the use of hysteresis generating mechanisms from parallel-type damper devices in serialized-type devices, while maintaining compactness and avoiding unintended hysteresis torque generation.
Implementation Method 1
The plurality of elastic members are circumferentially aligned and elastically couple the first rotor and the second rotor in a rotational direction
Implementation Method 2
The hysteresis generating mechanism generates a hysteresis torque in relative rotation between the first rotor and the second rotor. The hysteresis torque attenuates vibrations attributed to fluctuations in inputted torque
Implementation Method 3
The support portion is shaped to protrude radially inward from the annular portion, is disposed between at least circumferentially adjacent two of the plurality of elastic members, and actuates the at least circumferentially adjacent two of the plurality of elastic members in series
Data Source
AI summary
A damper device includes a first rotor, a second rotor rotatable relative to the first rotor, a plurality of elastic members circumferentially aligned, an intermediate member, and a hysteresis generating mechanism. The intermediate member is disposed axially between the first rotor and the second rotor. The hysteresis generating mechanism is disposed axially between the first rotor and the second rotor to generate a hysteresis torque in relative rotation between the first rotor and the second rotor. The intermediate member includes an annular portion and a support portion. The annular portion is provided radially outside the plurality of elastic members. The support portion protrudes radially inward from the annular portion. The support portion is disposed between at least circumferentially adjacent two of the plurality of elastic members. The support portion actuates the at least circumferentially adjacent two of the plurality of elastic members in series.