Quad-Motor Electric Work Vehicle Layout for Traction Balance
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Solution Overview
Problem
Existing electric work vehicles, such as electric tractors, lack an efficient and balanced motor configuration that optimizes power distribution and maneuverability, particularly in agricultural applications.
Innovation Solution
A quad-motor configuration with two motors for the front wheels and two motors for the rear wheels, where the rear motors are positioned asymmetrically to provide differential spacing and power distribution, along with a dedicated motor for a power take-off and hydraulic system, enhancing maneuverability and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If four motors are used with asymmetric spacing (front motors closer than rear motors), then power distribution balance and stability are improved, but device complexity increases
Solution Approach 1:
The patent applies asymmetry by configuring the four motors with non-uniform spacing: the distance between the two front motors is different from the distance between the two rear motors. This asymmetric arrangement creates balanced power distribution across the vehicle's wheelbase while maintaining structural stability, resolving the contradiction between improved stability and increased complexity by optimizing the spatial relationship between motors.
Solution Approach 2:
The patent implements local quality by assigning different spacing characteristics to different motor pairs based on their functional requirements. The front motors are positioned with specific spacing optimized for steering and front-wheel traction, while the rear motors are positioned with different spacing optimized for drive power and rear-wheel traction. This localized optimization achieves overall vehicle stability without requiring complete symmetry throughout the entire motor configuration.
2Loss of energy
If motors are spaced closer together for efficient gearing, then power transmission efficiency is improved, but vehicle stability and power distribution balance deteriorate
Solution Approach 1:
The patent applies parameter changes by varying the spacing parameters between different motor pairs. Specifically, the distance between front motors is optimized for efficient gearing and power transmission to the front wheels, while the distance between rear motors is optimized for balanced power distribution to the rear wheels. This differential parameter optimization allows each motor pair to operate at peak efficiency while maintaining overall vehicle stability and power balance.
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
The quad-motor configuration improves power distribution, enhances maneuverability, and supports additional functionalities like PTO and hydraulic operations, making the vehicle more efficient and versatile for agricultural tasks.
Implementation Method 1
a first motor to drive a first front wheel, the first motor being support by the frame, a second motor to drive a second front wheel, the second motor being support by the frame, a third motor to drive a first rear wheel, the third motor being support by the rear housing, and a fourth motor to drive a second rear wheel
Data Source
AI summary
An electric work vehicle includes a frame, a rear housing, a first motor to drive a first front wheel, the first motor being support by the frame, a second motor to drive a second front wheel, the second motor being support by the frame, a third motor to drive a first rear wheel, the third motor being support by the rear housing, and a fourth motor to drive a second rear wheel, the fourth motor being support by the rear housing. The first motor and the second motor are spaced apart from each other by a first distance in a left-right direction of the electric work vehicle. The third motor and the fourth motor are spaced apart from each other by a second distance in the left-right direction of the electric work vehicle. The first distance is shorter than the second distance.