Electric Vehicle Reducer Power Distribution Mechanism
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Solution Overview
Problem
Existing electric vehicle drive systems face a problem of insufficient power when a wheel on one side idles or slips, as they rely on a single motor to drive the non-idling wheel, leading to power limitations.
Innovation Solution
The proposed solution involves a reducer with a differential apparatus and transmission assemblies that allow both motors to simultaneously transmit power to the wheel that does not idle or slip, ensuring improved power distribution and stability through various drive modes, including single-motor centralized, dual-motor centralized, and dual-motor distributed drive modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single motor drives the non-idling wheel when one wheel slips, then the structure is simple, but the power is insufficient
Solution Approach 1:
The patent combines power from both the first motor and second motor through the differential apparatus to drive the same wheel when one wheel slips. The first input shaft transmission assembly and second input shaft transmission assembly both connect to the differential apparatus, which then transmits combined power to the non-idling wheel, resolving the power insufficiency problem while maintaining reasonable structural integration.
Solution Approach 2:
The differential apparatus serves multiple functions: it enables normal differential power distribution during normal driving, and simultaneously acts as a power combining mechanism when one wheel slips. The transmission assemblies can selectively connect either motor to the differential apparatus, providing universal power delivery capability across different driving conditions.
2Productivity
If power transmission is connected between first input shaft and centralized driving piece during wheel slip, then power path is direct, but the second motor cannot contribute power
Solution Approach 1:
The transmission assemblies are designed with dynamic connection capabilities, allowing the system to switch between different power transmission paths based on driving conditions. During wheel slip, the system dynamically connects both motors to the differential apparatus through the transmission assemblies, enabling both motors to contribute power while maintaining efficient power transmission through the differential mechanism.
Data Source
AI summary
A reducer, an electric vehicle drive system with the reducer, and a control method for the electric vehicle drive system with the reducer comprises, in a reducer, a first countershaft is transmittingly connected to a first input shaft, a second countershaft is transmittingly connected to a second input shaft, and a centralized driving piece is transmittingly connected to a power input end of a differential apparatus. A first transmission assembly and a second transmission assembly are respectively configured to connect or disconnect power transmission between the first countershaft and the centralized driving piece and connect or disconnect transmission assembly power transmission between the second countershaft and the centralized driving piece. A first output shaft and a second output shaft are transmittingly connected to two power output ends of the differential apparatus respectively.