Modular Vehicle Drive System with Coordinated Planetary Transmission
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Solution Overview
Problem
Modular drive systems face challenges in meeting quality requirements for transmission efficiency, particularly in achieving an optimal transmission ratio with a high portion of identical parts, while accommodating different vehicle models and drive motors.
Innovation Solution
A modular drive system that uses a gear chain and planetary transmission to transmit torque to the axle, with the planetary transmission coordinated with the drive motor to determine the overall transmission ratio, allowing for fine-tuning and maximizing the use of identical standardized components, including a spur gear differential for efficient torque distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a modular drive system is assembled from standardized components, then production economy and ease of manufacture are improved, but transmission efficiency and quality requirements deteriorate
Solution Approach 1:
The planetary transmission is designed with a universal basic structure that can be coordinated with different drive motors through standardized mounting interfaces and gear ratios. This allows the same planetary transmission module to serve multiple vehicle models and motor types while maintaining optimal transmission efficiency through proper coordination with the drive motor characteristics.
2Device complexity
If as many identical parts as possible are used in a modular drive system, then device complexity is reduced and production economy is improved, but adaptability to different vehicle models and drive motors deteriorates
Solution Approach 1:
The planetary transmission maintains a standardized basic structure but allows adaptation to different drive motors through parameter changes such as gear ratios, torque capacity, and mounting dimensions. This enables the same fundamental design to be coordinated with various drive motor types and power capacities while still using mostly identical components across different vehicle models.
3Reliability
If the planetary transmission is coordinated with the drive motor to determine overall transmission ratio, then transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The planetary transmission is pre-coordinated with specific drive motor types during the design phase to determine optimal overall transmission ratios. This preliminary coordination ensures that the planetary transmission modules are matched to drive motor characteristics before assembly, achieving high transmission efficiency without requiring complex real-time adjustments or controls during operation.
Data Source
AI summary
A drive system for a vehicle has a drive motor and an axle. A driving torque generated by the drive motor is transmitted via a gear chain and a planetary transmission to the axle. The drive system can be assembled modularly, and wherein the planetary transmission is coordinated with the drive motor to determine an overall transmission ratio.