Drive Torque Distribution Apparatus Using Rotary Electric Machine
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing drive torque distribution apparatuses are complex and incur losses when the right and left drive shafts rotate at equal speeds, requiring three planetary gear mechanisms to achieve torque distribution adjustments.
Innovation Solution
A drive torque distribution apparatus featuring a differential device and a rotary electric machine with rotors that generate a torque difference between the first and second rotors, allowing for torque distribution adjustments between the drive shafts without increasing structural complexity, and incorporating a rotation transmitting device to amplify and output the torque difference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If three planetary gear mechanisms are used to adjust torque distribution, then torque distribution adjustment is achieved, but device complexity increases
Solution Approach 1:
The patent extracts the torque distribution adjustment function from the complex three-planetary-gear system and implements it using a simpler arrangement with a single planetary gear mechanism combined with a clutch device. This allows torque distribution to be adjusted by selectively engaging or disengaging the clutch, rather than requiring three separate planetary gear mechanisms to work in concert.
Solution Approach 2:
The patent replaces the purely mechanical three-planetary-gear system with a hybrid system that incorporates a clutch device controlled by rotational speed differences. This substitution allows the system to achieve torque distribution adjustment through a combination of mechanical elements and controlled engagement/disengagement, reducing overall structural complexity.
2Adaptability or versatility
If three planetary gear mechanisms are used to achieve torque distribution, then torque distribution is adjusted, but manufacturing cost increases
Solution Approach 1:
The patent extracts the essential torque distribution function from the expensive three-planetary-gear system and implements it with fewer components. By using a single planetary gear mechanism combined with a clutch device, the number of manufactured parts is reduced, directly lowering manufacturing costs while preserving the torque distribution adjustment capability.
Solution Approach 2:
The patent creates a simplified version of the torque distribution mechanism that copies only the essential functionality of the three-planetary-gear system. Instead of manufacturing three complete planetary gear sets, the invention uses a single planetary gear mechanism with a clutch, reducing material costs and manufacturing complexity.
3Adaptability or versatility
If the pinion gear spins to adjust torque distribution, then torque distribution changes, but energy loss occurs when drive shafts rotate at equal speeds
Solution Approach 1:
The patent implements a self-regulating mechanism where the clutch device automatically engages or disengages based on the rotational speed difference between drive shafts. When the drive shafts rotate at equal speeds, the clutch remains disengaged, preventing energy loss. When speed differences occur, the clutch automatically engages to provide the necessary torque distribution adjustment, making the system self-service and energy-efficient.
Solution Approach 2:
The patent introduces dynamic control through the clutch device, which can transition between engaged and disengaged states based on operating conditions. This dynamic behavior allows the system to adapt to varying speed differences, engaging only when necessary for torque distribution and remaining disengaged during equal-speed operation to minimize energy loss.
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 simplifies the structure for torque distribution adjustments and reduces losses when the drive shafts rotate at equal speeds, while effectively adjusting torque distribution between the drive shafts by leveraging the rotary electric machine and rotation transmitting device.
Implementation Method 1
a rotary electric machine that can generate a torque between a first rotor and a second rotor rotatable relative to each other
Data Source
AI summary
When a first drive shaft and a second drive shaft rotate at equal rotational speeds, a first rotor and a second rotor rotate at equal rotational speeds. On the other hand, a rotational difference is generated between the first drive shaft and the second shaft by generating a torque between the first rotor and the second rotor and consequently, a rotational difference between the first rotor and the second rotor, so that a torque distribution between the first drive shaft and the second drive shaft is adjusted according to the torque generated between the first rotor and the second rotor. With this process, the torque distribution between the first drive shaft and the second drive shaft is adjusted without complicating the structure, and a loss when the first drive shaft and the second drive shaft rotate at equal rotational speeds is reduced.