Stacked-Layer Torsion Damper Web for Overtorque Rigidity
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Solution Overview
Problem
Existing torsion dampers in vehicle transmission systems face issues of insufficient mechanical strength due to excessive deformation of drive arms under overtorque stresses and poor support quality from misaligned stacked discs, leading to vibrations and noise.
Innovation Solution
A torsion damper design featuring axially stacked layers with radially connected drive arms using connecting means such as riveting or welding, ensuring mechanical resistance, alignment, and easy assembly, while reducing material usage and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If stacked discs are connected by rivets in the central annular part, then manufacturing process is simpler and more economical, but mechanical strength is insufficient due to excessive deformation of drive arms under overtorque stresses
Solution Approach 1:
The web is divided into multiple axially stacked layers (first layer with first drive arms, second layer with second drive arms) connected by connecting means positioned radially between the drive arms and elastic members. This segmentation allows each layer to be manufactured separately and then assembled, maintaining manufacturing simplicity while the radial connection provides superior mechanical strength compared to central riveting.
Solution Approach 2:
The connecting means is positioned in a different spatial dimension (radially outward from the center) compared to conventional central annular part connections. This radial positioning creates a more efficient load path that better resists overtorque stresses, transforming the weak central connection into a strong peripheral connection without compromising manufacturing ease.
2Ease of manufacture
If stacked discs are connected by rivets in the central annular part, then manufacturing process is simpler and more economical, but support quality deteriorates due to defects in positioning of discs with respect to each other
Solution Approach 1:
The connecting means acts as an intermediary element that joins the first and second layers radially. This intermediary connection provides inherent alignment features that ensure proper positioning of the layers relative to each other, eliminating the positioning defects that occur with central riveting while maintaining the economic benefits of stacked disc manufacturing.
3Reliability
If drive arms are positioned circumferentially between elastic members, then torque transmission is improved, but mechanical strength decreases due to excessive deformation under overtorque stresses
Solution Approach 1:
The first drive arms and second drive arms are merged into a unified structure through the connecting means positioned radially between them and the elastic members. This merging creates a more rigid assembly that maintains the torque transmission benefits of circumferential positioning while significantly improving resistance to overtorque deformation through the radial connection geometry.
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
Enhances mechanical strength, reduces deformations, and improves support quality, thereby minimizing vibrations and noise, while being economical and efficient in manufacturing.
Implementation Method 1
elastic members elastically coupling the torque input element to the torque output element in rotation
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Torsion damper (1) for a torque transmission device comprising: - a torque input element (2) and a torque output element (3) rotatable about an axis of rotation (X); - elastic members (4) elastically coupling in rotation the torque input element to the torque output element; and - a web (5) configured to cooperate with the elastic members, the web comprising a plurality of axially stacked layers (51, 52), each layer comprising at least two radially extending drive arms (521, 521) to be positioned circumferentially between two elastic members, the layers being connected together by their drive arms by a connecting means (6).