Hybrid Drive Module Nested Planetary Gear in Rotor
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing hybrid drive modules for vehicles face challenges in achieving a compact, reliable, and efficient design that optimally combines internal combustion engines and electric drive machines within a limited installation space, while maintaining high operational reliability.
Innovation Solution
A hybrid drive module featuring a planetary gear stage with a sun gear, ring gear, and planetary gear carrier, where the sun gear is rotationally fixed to the housing, and the rotor of the electric drive machine is connected to the ring gear, incorporating a clutch for torque transmission and a bearing system that allows for precise and space-saving design, enabling efficient power summation from both engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the planetary gear set is arranged radially within the rotor of the electric drive machine, then the installation space is reduced and compactness is improved, but the manufacturing precision and assembly complexity increase
Solution Approach 1:
The planetary gear set is nested within the rotor of the electric drive machine, with the ring gear arranged at least partially within the rotor in the radial and axial directions. This nesting arrangement significantly reduces the overall installation space while maintaining the functional requirements of both the electric drive machine and the planetary gear mechanism.
Solution Approach 2:
The bearing system is designed with differentiated local qualities: radial bearings support the ring gear at specific locations, while axial bearings are positioned to handle axial loads. This localized optimization of bearing characteristics enables precise positioning and support within the constrained radial space, resolving the conflict between compactness and manufacturing precision.
2Device complexity
If the ring gear is arranged at least partially within the rotor in the radial and axial directions, then the device complexity is reduced and space utilization is improved, but the reliability and load bearing capacity may be affected
Solution Approach 1:
The rotor structure serves multiple functions: it provides the magnetic field generation for the electric drive machine while simultaneously housing the planetary gear set. The ring gear is integrated into this multi-functional structure, reducing overall device complexity while maintaining operational reliability through proper load distribution across the bearing system.
Solution Approach 2:
The bearing system is pre-configured with specific radial and axial bearing arrangements that are designed beforehand to handle the combined loads from both the electric drive machine and the planetary gear mechanism. This preliminary design of the bearing configuration ensures operational reliability is maintained from the outset, even with the compact integrated arrangement.
3Stability of the object's composition
If the sun gear is connected in a rotationally fixed fashion to the housing, then the structural stability is improved, but the adaptability and flexibility of the drive module decrease
Solution Approach 1:
The drive module is segmented into distinct functional components: the planetary gear stage with its fixed sun gear connection to the housing, and the electric drive machine with the rotor-mounted ring gear. This segmentation allows the sun gear to maintain its rotationally fixed connection for structural stability, while the overall module retains adaptability through the independent operation and coupling of the electric drive machine and planetary gear mechanism.
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 configuration enables a compact, reliable, and efficient drivetrain with improved operational performance by allowing for precise bearing systems, selective torque transmission, and space-saving design, enhancing the overall efficiency and reliability of the hybrid drive module.
Implementation Method 1
The at least one planetary gear or a plurality of planetary gears preferably mesh with the sun gear and the ring gear in order to transmit power
Implementation Method 2
The rotor and the stator also preferably are separated from one another by way of an air gap, wherein the efficiency of the transmission of energy from the stator to the rotor is dependent, in particular, on the size of this air gap
Implementation Method 3
The clutch is configured to interrupt selectively the transmission of torque, preferably from an internal combustion engine to the planetary gear carrier
Data Source
AI summary
A hybrid drive module for a motor vehicle is provided. The hybrid drive module includes a planetary gear stage with a sun gear, a ring gear, a planetary gear carrier and at least one planetary gear that is rotatably mounted with respect to the planetary gear carrier. The hybrid drive module also includes an electric drive machine having a stator and a rotor. The ring gear and the rotor, and the planetary gear carrier and a separation clutch can be connected in a torque-conducting manner. The separation clutch is configured to interrupt the torque transfer to the planetary gear carrier, and the ring gear is arranged in the radial and axial directions at least in sections inside the rotor. The planetary gear carrier is mounted with the axial bearing and the radial bearing in a rotatable manner with respect to the housing.