Direct Driving Module Coupler for Electric Vehicle Differential
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Solution Overview
Problem
Conventional differential devices in electric vehicles face challenges in adapting to changes in the driving axle, leading to reduced durability of the driving motor due to compressive or tensile loads from external forces.
Innovation Solution
A direct-type driving module for electric vehicles that connects the driving axle of the driving motor to a driving bevel gear through a coupler, utilizing bearings and fastening mechanisms to securely transmit power while allowing for axial adjustments and preventing load application on the motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the driving axle is integrally formed with the driving part, then the structure is simple, but it is difficult to adapt to changes in the driving axle and causes compressive or tensile loads on the motor rotator
Solution Approach 1:
The integral structure is divided into separate components: the driving axle, coupler, and driving bevel gear are made as independent parts that can be assembled and disassembled. This segmentation allows for easy replacement and adaptation of the driving axle while maintaining structural simplicity through modular design.
Solution Approach 2:
A coupler is introduced as an intermediary component between the driving axle and the driving bevel gear. This coupler acts as a mediator that transmits power while preventing compressive or tensile loads from being directly applied to the motor rotator, thus protecting the motor while maintaining structural simplicity.
2Ease of manufacture
If the driving axle is integrally formed with the driving part, then manufacturing is easier, but the durability of the driving motor decreases due to external forces
Solution Approach 1:
By segmenting the integral structure into separate components (driving axle, coupler, driving bevel gear), the manufacturing process becomes easier as each component can be manufactured independently using standard processes, while the assembled structure protects the motor from external forces.
Solution Approach 2:
The coupler serves as a protective intermediary that isolates the motor rotator from compressive and tensile loads generated by external forces on the driving axle. This mediator component absorbs and redirects these forces, thereby improving motor durability without complicating manufacturing.
3Power
If a direct-type driving method is used, then power transmission is efficient, but the motor rotator is subjected to compressive or tensile loads from external forces
Solution Approach 1:
The coupler is positioned as an intermediary component in the power transmission path between the driving axle and driving bevel gear. It efficiently transmits rotational power while simultaneously preventing compressive and tensile loads from external forces from reaching the motor rotator, thus maintaining power efficiency while protecting the motor.
Solution Approach 2:
The power transmission system is segmented into distinct functional components where the coupler specifically handles load isolation while the driving bevel gear handles power transmission. This segmentation allows efficient power transmission through the gear mechanism while the coupler protects the motor rotator from damaging loads.
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
Enhances the durability of the driving motor by allowing for easy adaptation to changes in the driving axle and preventing compressive or tensile loads, thereby improving the module's ability to handle external forces during operation.
Implementation Method 1
a first bearing installed at the coupler and having an inner wheel supported to the coupler and an outer wheel supported to a housing of the differential device
Implementation Method 2
a second bearing installed at the driving bevel gear and having an inner wheel supported to the driving bevel gear and an outer wheel supported to a housing of the differential device
Implementation Method 3
a coupler having a first connection part provided at one side and a second connection part provided at the other side, the first connection part connected to a driving axel of a driving motor, and the second connection part connected to a driving bevel gear
Implementation Method 4
a fastening part connecting the coupler and the driving bevel gear to each other
Data Source
AI summary
Disclosed is a direct-type driving module of a differential gear for an electric vehicle, which is configured to directly connect a driving shaft of a driving motor to a driving bevel gear without a decelerator. In the direct-type driving module according to the present invention, the driving axel of the driving motor is connected to a driving bevel gear geared with the differential gear through a coupler, thereby easily adapting to the change of a driving axel. In addition, a rotator of the driving motor can be prevented from being compressed or applied with a tensile load due to an external force applied to a driving axel installed in a direct-type driving method, thereby increasing durability of the driving motor.