Electric Three-Wheel Vehicle Power Unit Layout
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Solution Overview
Problem
Conventional electric three-wheel vehicles with power units between the left and right rear wheels face challenges in achieving optimal weight balance and reducing the size of the power unit due to the large left-right width of the power unit components.
Innovation Solution
The power unit is configured with the electric motor and differential mechanism placed near the vehicle's left-right center, overlapping each other to reduce the left-right width, and the power transmission mechanism is positioned away from the center to enhance weight balance and reduce the overall size of the power unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the electric motor, transmission and differential mechanism are distributed between the left and right sides of the vehicle body, then the weight balance between the left and right sides is enhanced, but the left-right width of the power unit becomes large
Solution Approach 1:
The patent applies dimensional reorganization by stacking the electric motor and differential mechanism in the vertical direction (one above the other) rather than placing them side-by-side in the horizontal direction. This vertical stacking arrangement reduces the left-right width of the power unit while maintaining proper weight distribution through strategic positioning of heavy components near the vehicle centerline.
2Area of stationary object
If the electric motor and differential mechanism are placed near the vehicle body left-right center, then the left-right width of the power unit is reduced, but the weight balance between the left and right sides may be affected
Solution Approach 1:
The patent employs asymmetric positioning where the electric motor and differential mechanism are placed at different horizontal positions relative to the vehicle centerline. Specifically, one component is positioned on the left side while the other is positioned on the right side, creating an asymmetric arrangement that balances the weight distribution while maintaining a compact left-right width through vertical stacking.
3Stability of the object's composition
If the power transmission mechanism is placed away from the vehicle body left-right center, then the weight balance is enhanced, but the complexity of the power unit layout increases
Solution Approach 1:
The patent segments the power transmission system into distinct functional modules: the electric motor, the differential mechanism, and the power transmission mechanism. Each module is positioned independently - with the motor and differential stacked vertically near the centerline for compactness, and the power transmission mechanism positioned separately to optimize weight balance, thereby managing complexity through modular segmentation.
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 improves weight balance between the left and right sides, reduces the power unit's size, facilitates easier starting with a centrifugal clutch, and lowers the center of gravity, while also simplifying assembly and reducing heat influence between components.
Implementation Method 1
The power unit includes a centrifugal clutch configured to connect and disconnect power transmission between the electric motor and the power transmission mechanism
Data Source
AI summary
An electric motor and a differential mechanism are placed near a vehicle body left-right center line distributed between the left and right sides of the vehicle body. In addition, at least parts respectively of the electric motor and the differential mechanism are placed on the vehicle body left-right center line. A deceleration mechanism is placed away from the vehicle left-right center line on one of the left and right sides of the vehicle.