Damper Device Dynamic Damper Parallel Torque Transfer Rigidity
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Solution Overview
Problem
Existing damper devices with dynamic dampers have limited ability to lower rigidity, as they primarily rely on vibration absorption elastic bodies for torque transfer, which restricts further reduction in rigidity and torque absorption efficiency.
Innovation Solution
Incorporating a rotation restriction stopper and additional coupling portions to allow the dynamic damper to function in parallel with torque transfer elastic bodies, reducing the rigidity of the damper device by distributing torque to other elastic bodies and enhancing vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the vibration absorption elastic body is used as the sole elastic body for torque transfer in the dynamic damper, then vibration damping is achieved, but the rigidity of the damper device cannot be sufficiently lowered
Solution Approach 1:
The patent merges the vibration damping function and torque transfer function into a single integrated dynamic damper structure. The vibration absorption elastic body is configured to perform both vibration damping and torque transfer, eliminating the need for separate elastic bodies and enabling sufficient rigidity reduction while maintaining reliability.
Solution Approach 2:
The vibration absorption elastic body is designed to serve multiple functions simultaneously: it acts as both the vibration damping element and the torque transfer element. This multi-functionality allows the damper device to achieve lower rigidity while ensuring reliable torque transfer between the input and output shafts.
2Reliability
If additional elastic bodies are added to transfer torque, then torque transfer reliability improves, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single elastic body component. The vibration absorption elastic body integrates both vibration damping and torque transfer capabilities, eliminating the need for additional separate elastic bodies and thereby reducing device complexity while maintaining torque transfer reliability.
Solution Approach 2:
The vibration absorption elastic body is designed as a universal component that performs both vibration damping and torque transfer functions. This multi-functional design avoids the complexity of adding separate dedicated components for each function.
3Stability of the object's composition
If the vibration absorption elastic body is configured for optimal vibration damping, then vibration damping performance improves, but torque absorption efficiency decreases
Solution Approach 1:
The patent merges vibration damping and torque absorption functions into a single integrated system. The vibration absorption elastic body is configured to simultaneously optimize both vibration damping performance and torque absorption efficiency through its structural design and material properties.
Solution Approach 2:
The patent optimizes parameters such as the rigidity distribution, damping coefficients, and structural geometry of the vibration absorption elastic body to achieve a balance between vibration damping performance and torque absorption efficiency. By carefully adjusting these parameters, both functions are enhanced rather than traded off against each other.
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 solution effectively lowers the rigidity of the damper device and improves torque absorption efficiency by allowing the dynamic damper to act in parallel with other elastic bodies, providing enhanced vibration damping capabilities.
Implementation Method 1
a dynamic damper that has a mass body and a vibration absorption elastic body disposed between the mass body and a first rotary element which is one of the plurality of rotary elements and that damps vibration by applying vibration in the opposite phase to the first rotary element
Implementation Method 2
damps vibration by applying vibration in the opposite phase
Implementation Method 3
torque transfer elastic bodies that include at least first and second elastic bodies that act in series between the input element and the output element to transfer torque
Implementation Method 4
an additional coupling portion provided to a second rotary element that is one of the plurality of rotary elements to which the dynamic damper is not coupled and configured to be coupled to an end portion of the vibration absorption elastic body before relative rotation between the input element and the output element is restricted by the rotation restriction stopper
Data Source
AI summary
A dynamic damper is coupled to an intermediate member of a damper device. A drive member of the damper device has additional abutment portions coupled to end portions of vibration absorption springs of the dynamic damper before both first and second inter-element stoppers operate. The second inter-element stoppers operate before the first inter-element stoppers operate and at least by the time when the additional coupling portions are coupled to end portions of the vibration absorption springs. Outer springs and the vibration absorption springs act in parallel to transfer torque after the additional coupling portions are coupled to end portions of the vibration absorption springs.