Damper Device Third Elastic Body Torque Absorption
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Solution Overview
Problem
Existing damper devices face limitations in absorbing larger torque fluctuations while maintaining low rigidity, as the maximum torsional angle between the input and output elements is restricted by the size and strength of the plates, necessitating a reduction in the circumferential length of the housing space to prevent the auxiliary damper spring from abutting against receiving surfaces.
Innovation Solution
Incorporating a third elastic body that can act in parallel with the first and second elastic bodies, supported by an elastic body support on the intermediate element, and an elastic body abutment on either the input or output element, which abuts with the third elastic body as the torsional angle increases, allowing for increased torque absorption without reducing the relative torsional angle and thus maintaining lower rigidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circumferential length of the housing space is increased to allow the auxiliary damper spring to act in parallel with the damper springs, then the maximum torsional angle of the center disk is reduced, but the ability to absorb large impact torque is improved
Solution Approach 1:
The housing space is designed to transition from a static constraint to a dynamic configuration. The flexible connection allows the auxiliary damper spring to engage with the housing space in a controlled manner during rotation, enabling the system to adapt its effective length based on the rotation angle and torque conditions, thus resolving the contradiction between maintaining large torsional angle and enabling parallel spring action
2Length of moving object
If the circumferential length of the housing space is decreased to maintain a larger maximum torsional angle, then the rigidity is reduced, but the auxiliary damper spring cannot engage to absorb large impact torque
Solution Approach 1:
The system dynamically adjusts the engagement between the auxiliary damper spring and the housing space based on rotation angle. At small rotation angles, the spring remains disengaged, preserving full torsional flexibility. At large rotation angles under high torque, the spring engages with the housing space to provide additional damping, thus resolving the contradiction between maintaining large torsional angle and enabling impact torque absorption
3Reliability
If the plates are made larger to increase the circumferential length of the housing space, then the auxiliary damper spring can act in parallel, but the strength and size constraints of the plates are worsened
Solution Approach 1:
The flexible connection creates a dynamic engagement mechanism where the auxiliary damper spring only interacts with the housing space when needed (at large rotation angles). This allows the housing space to have sufficient effective length for spring engagement without requiring the plates to be continuously large across all circumferential positions, thus resolving the contradiction between enabling parallel spring action and maintaining compact plate size
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 enables the damper device to absorb larger torque fluctuations while maintaining lower rigidity by increasing the maximum torsional angle, as the third elastic body acts in parallel with the first and second elastic bodies, reducing the need to reduce the relative torsional angle and allowing for more efficient torque absorption.
Implementation Method 1
a first elastic body that transfers torque between the input element and the intermediate element
Implementation Method 2
a second elastic body that transfers torque between the intermediate element and the output element
Implementation Method 3
the auxiliary damper spring and the damper springs act in parallel with each other to absorb large impact torque transferred to the center disk and torque fluctuations
Data Source
AI summary
A damper device that includes an elastic body support provided to the intermediate element to support both end portions of the third elastic body at least when torque is not transferred between the input and the output; and an elastic body abutment provided to one of the input and the output, the elastic body abutment not abutting against an end portion of the third elastic body at least when torque is not transferred between the input and the output, but abutting against one of the end portions of the third elastic body as a relative torsional angle between the one of the input and the output and the intermediate element is increased when torque is transferred between the input and the output.