Bidirectional Torque Transfer Device with Cone Clutch Segmentation
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Solution Overview
Problem
Existing torque transfer devices in vehicle drivelines lack efficient two-way overrunning capabilities with torque limitation, particularly in cone clutch arrangements, which restrict bidirectional power transmission and torque distribution.
Innovation Solution
A torque transfer device featuring a pair of cone clutches with threaded shafts and overload springs, allowing for bidirectional power transmission by engaging and disengaging cone clutch surfaces through rotational direction changes, ensuring torque limitation and efficient power distribution between driveline components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional single cone clutch arrangement is used, then the structure is simple, but bidirectional power transmission capability is limited
Solution Approach 1:
The single cone clutch is segmented into two separate cone clutches (first cone clutch and second cone clutch) with independent cone clutch surfaces. Each cone clutch is responsible for power transmission in one rotational direction, enabling bidirectional power transmission while maintaining structural clarity and functionality.
Solution Approach 2:
The clutch arrangement transitions from a single-dimensional (one-way) power transmission design to a two-dimensional (bidirectional) design by adding rotational direction as a new dimension. The first and second cone clutches are positioned to engage based on rotational direction, allowing power transmission in both clockwise and counter-clockwise directions.
2Reliability
If torque limitation mechanism is added to cone clutch arrangement, then torque distribution control is improved, but device complexity increases
Solution Approach 1:
An intermediary mechanism (torque limitation mechanism) is introduced between the power source and the driven components. This mechanism includes elements such as overload springs or shear pins that automatically engage to limit torque when a predetermined threshold is exceeded, providing reliable torque distribution control without requiring complex electronic control systems.
Solution Approach 2:
The torque limitation mechanism is designed to operate automatically based on the mechanical conditions within the system. When torque exceeds the predetermined limit, the mechanism self-activates through mechanical means (such as spring compression or component disengagement) to protect the driveline, eliminating the need for external monitoring or control systems.
3Adaptability or versatility
If bidirectional overrunning capabilities are implemented, then operational flexibility is enhanced, but manufacturing complexity increases
Solution Approach 1:
The bidirectional overrunning clutch is segmented into two independent one-way clutch mechanisms (first and second cone clutches). Each segment handles one rotational direction independently, allowing for modular manufacturing and assembly. This segmentation simplifies the manufacturing process compared to designing a single complex bidirectional mechanism.
Solution Approach 2:
Two separate one-way clutch mechanisms are merged into a single integrated bidirectional overrunning clutch assembly. The first and second cone clutches share common structural elements such as the housing, mounting flanges, and torque limitation mechanism, allowing for efficient manufacturing while achieving bidirectional overrunning capabilities.
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
Enables efficient bidirectional torque transmission and distribution while maintaining torque limitation, enhancing the operational flexibility and reliability of vehicle drivelines by utilizing cone clutch surfaces and overload springs to manage power flow effectively.
Implementation Method 1
The output portion has a first case member, a second case member and an overload spring. The first case member is axially slidably but non-rotatably mounted on the second case member. The overload spring biases the first and second case members toward one another.
Implementation Method 2
The first and second cone clutch surfaces are mounted on the thread on the shaft of the input portion. The first and second mating cone clutch surfaces are received between the first case member and the second case member.
Data Source
AI summary
An overrunning torque transmitting device that employs a plurality of cone clutches and an overload mechanism for limiting the torque transmitted through the device in a predetermined rotational direction. A method for transmitting torque is also provided.