Torque Transmission Device Elastic Connecting Section
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Solution Overview
Problem
Existing torque transmission devices in motor vehicle drive trains experience undesirable bending loads due to centrifugal forces acting on pendulum masses, leading to increased stress on the rotary component.
Innovation Solution
An axially elastic connecting section is introduced between two annular disk-shaped extension sections of a rotary component, allowing axial mobility and reducing bending stress, with additional mass elements like pendulum masses and a flexible connecting element, such as a spring plate, to manage centrifugal forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid connecting section is used to fasten the first and second annular disk-shaped extension sections, then structural strength is improved, but bending stress increases under centrifugal force
Solution Approach 1:
The connecting section is designed with elastic properties, changing its mechanical parameter from rigid to flexible. This allows the connecting section to deform elastically under centrifugal force, accommodating the bending load without transmitting excessive stress to the extension sections, thereby reducing bending stress while maintaining structural integrity
Solution Approach 2:
The connecting section is designed as a flexible component that can elastically deform under load. This flexibility allows it to absorb bending stresses generated by centrifugal forces on the pendulum masses, protecting the rigid extension sections from excessive stress while maintaining the overall structural strength of the rotary component
2Reliability
If pendulum masses are arranged on the rotary component for vibration damping, then vibration damping performance is improved, but bending load on the connecting section increases
Solution Approach 1:
The elastic connecting section converts the harmful bending load from centrifugal forces into beneficial elastic deformation. The flexibility of the connecting section allows it to absorb and dissipate the bending energy through elastic deformation, transforming the harmful stress into a protective mechanism that maintains structural integrity while enabling effective vibration damping
Solution Approach 2:
The elastic connecting section acts as a pre-designed cushioning element that anticipates and absorbs the bending loads generated by centrifugal forces on the pendulum masses. By incorporating this elastic element beforehand, the structure is prepared to handle the expected loads without experiencing excessive stress, thereby protecting the system while maintaining vibration damping functionality
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 significantly reduces bending stress on the rotary component while ensuring reliable guidance of pendulum masses, enhancing the durability and efficiency of the torque transmission device.
Implementation Method 1
The connecting section (18) is elastic. As a result, an axially elastic potting of a component can be achieved, which reduces its bending stress
Implementation Method 2
Under the influence of centrifugal force on the rotary component, a bending load can occur in the area of the connecting section
Data Source
Figure 1a~1b
Figure 2
Figure 3
AI summary
The invention relates to a torque transmission device in a drive train of a motor vehicle, having a rotational component rotatable about a rotational axis, said component having a first annular disc-shaped extension section and a second annular disc-shaped extension section axially spaced therefrom, wherein the first and the second annular disc-shaped extension section are fastened to one another via a connecting section, wherein the connecting section is resilient.