Electric Work Vehicle Layout for Width and Weight Balance
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Solution Overview
Problem
Existing electric work vehicles face issues with weight imbalance and increased width due to the positioning of batteries, motors, and transmission devices, leading to complex power transmission structures.
Innovation Solution
The configuration positions the transmission device backward of the battery, with the motor and inverter under the battery, allowing for a well-balanced weight distribution and reduced width, and simplifies the power transmission structure by eliminating the need for additional components to bypass the inverter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the battery capacity is increased to extend travel distance, then the travel distance is improved, but the vehicle width and weight are increased
Solution Approach 1:
The patent redistributes components along the front-back dimension of the vehicle rather than arranging them side-by-side. The transmission device is positioned behind the battery, and the motor is positioned behind the transmission device, creating a longitudinal arrangement that reduces the lateral width requirement while accommodating larger battery capacity
2Device complexity
If the transmission device is placed under the battery, then the power transmission is simplified, but the front-back weight balance is deteriorated
Solution Approach 1:
Instead of placing the transmission device directly under the battery (vertical arrangement), the patent positions it behind the battery (longitudinal arrangement). This spatial reconfiguration maintains the simplicity of power transmission while distributing weight along the front-back axis to achieve better balance
3Device complexity
If the motor is positioned leftward of the battery and the inverter rightward, then the power transmission path is shortened, but the vehicle width is increased
Solution Approach 1:
The patent combines the motor and inverter into a single integrated unit positioned behind the battery. This merging eliminates the need for separate leftward and rightward placements, reducing vehicle width while maintaining efficient power transmission through the integrated design
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 results in a balanced weight distribution, reduced width, and simplified power transmission, enhancing the stability and efficiency of the electric work vehicle.
Implementation Method 1
an inverter configured to convert direct-current electric power from the battery into alternating-current electric power and supply the alternating-current electric power to the motor
Implementation Method 2
a motor drivable on electric power supplied by the battery
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An electric work vehicle includes: a battery 4; a motor M positioned under the battery 4 and drivable on electric power supplied by the battery 4; a travel device drivable by the motor; an inverter 14 positioned under the battery 4 and forward of the motor M and configured to convert direct-current electric power from the battery 4 into alternating-current electric power and supply the alternating-current electric power to the motor M; and a transmission device positioned backward of the battery 4 and configured to transmit a driving force of the motor M to the travel device, wherein the motor M and the inverter 14 are arranged in a front-back direction of a machine body. (Fig. 2)