Belt Pulley Decoupler Mounting Plate for Robust Torque Transfer
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Solution Overview
Problem
Existing belt pulley decouplers face limitations in transmitting higher torques due to the negative influence of separately manufactured counter-holders, which increase friction and reduce the robustness of the connection.
Innovation Solution
A belt pulley decoupler design featuring a fastening region with a plate portion supported axially on a flange element, utilizing an interference fit or press connection, and a dome portion that protrudes axially from the mounting plate or flange element, eliminating the need for a separate counter-holder and enhancing the robustness of the connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a separately manufactured counter-holder is used with riveted connection, then the assembly can be constructed, but the maximum torque transmission capability is reduced
Solution Approach 1:
The patent merges the previously separate counter-holder component into the hub constituent part itself. The hub constituent part now directly provides the counter-holding function through its integrated design, eliminating the need for a separate riveted connection and the associated friction losses that reduced torque transmission capability.
Solution Approach 2:
The patent extracts and eliminates the separate counter-holder component and its riveted connection system. By removing this separate component, the design eliminates the friction-increasing measures and connection complexity that were negatively impacting maximum torque transmission.
2Reliability
If a separate counter-holder with riveted connection is used, then the vibration absorber can be assembled, but the connection robustness is reduced
Solution Approach 1:
The patent combines the counter-holder function directly into the hub constituent part, creating a more robust integrated connection. This merging eliminates the separate riveted joint and improves connection reliability while simultaneously simplifying the manufacturing process by reducing the number of components and assembly steps.
3Ease of manufacture
If multiple separate components are used, then the assembly can be constructed, but the number of manufacturing steps increases
Solution Approach 1:
The patent merges multiple separate components (hub constituent part and counter-holder) into a single integrated component. This reduces the total number of components from two to one, thereby reducing the number of manufacturing steps and assembly operations required.
Solution Approach 2:
The hub constituent part is designed to serve multiple functions: it provides structural support, torque transmission, and counter-holding capability. This multi-functionality eliminates the need for separate dedicated counter-holder components, simplifying both manufacturing and assembly processes.
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 design allows for robust torque transmission without additional friction-increasing measures, simplifies assembly, and integrates the torsional vibration absorber directly into the mounting plate, eliminating the need for riveting and separate counter-holders, thereby improving the overall efficiency and stability of the belt pulley decoupler.
Implementation Method 1
the dome portion is fastened to the flange element or the mounting plate by means of an interference fit/press connection. That interference fit is understood in particular to mean a connection that ensures that the mounting plate resists the external forces acting during transport of the assembled belt pulley decoupler and before final assembly on the crankshaft
Data Source
AI summary
The disclosure relates to a belt pulley decoupler for a motor vehicle drive train that includes a hub constituent part configured for attachment to a crankshaft of an internal combustion engine, a flexible drive element pulley supported in a spring-damped manner relative to the hub constituent part, and a vibration absorber. The vibration absorber includes a mounting plate that extends from a fastening region, which is supported on the hub constituent part and connected to the hub constituent part in a positively locking and/or non-positive manner, radially outwards to a collar region which receives at least one mass element. The fastening region has a plate portion which is supported axially on a flange element of the hub constituent part and which is held relative to the hub constituent part via an axially running dome portion formed either by the mounting plate or the flange element.