Electric Work Vehicle Motor Layout for Compact Power Routing
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Solution Overview
Problem
Existing electric work vehicles face challenges in efficiently distributing power to multiple motors while maintaining a compact and efficient design, particularly in electric tractors, which require a balanced power distribution to all wheels and auxiliary components.
Innovation Solution
The electric work vehicle is designed with a frame that supports multiple motors, each with its own power connection line, and a specific arrangement of motor baseplates to accommodate these motors, allowing for efficient power distribution and compact layout, including a unique positioning of power terminals for each motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple motors are mounted on the frame with spaced apart baseplates, then power distribution to multiple wheels is improved, but device complexity increases
Solution Approach 1:
The power distribution system is segmented into multiple independent motor units, each with its own baseplate and power connection line. This allows each motor to be independently mounted and connected, simplifying the overall power distribution architecture while enabling efficient power delivery to multiple wheels
Solution Approach 2:
The motor baseplates are designed as universal mounting structures that can accommodate different motor configurations. The baseplates serve multiple functions: structural support, electrical connection housing, and spatial positioning, thereby reducing the need for additional specialized components and reducing overall device complexity
2Volume of moving object
If power connection lines are routed through the space between baseplates, then space utilization is improved, but ease of manufacture worsens
Solution Approach 1:
The power connection lines are pre-routed through designated channels and conduits within the baseplate structures before final assembly. This preliminary routing action simplifies the manufacturing process by providing clear guidance for cable installation, reducing assembly complexity despite the compact spatial arrangement
Solution Approach 2:
The power connection lines are nested within the space between the baseplates, utilizing the existing structural voids for cable routing. This nesting approach maximizes space utilization by incorporating electrical pathways within the mechanical structure rather than adding separate external routing systems
3Productivity
If power terminals are positioned at opposite ends of motors in front-rear direction, then power distribution efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The power terminals are positioned asymmetrically at opposite ends of the motors in the front-rear direction, creating an optimized power distribution geometry. This asymmetric positioning maximizes electrical efficiency by minimizing current path length and reducing resistance, while the baseplate structures provide reference features that accommodate the precision requirements during assembly
Data Source
AI summary
An electric work vehicle includes a frame, a first motor to drive a first wheel, the first motor being supported by the frame and mounted on a first motor baseplate, and a second motor to drive a second wheel, the second motor being supported by the frame and mounted on a second motor baseplate. The first motor baseplate and the second motor baseplate are spaced apart from each other to define a space between the first motor baseplate and the second motor baseplate. A portion of a first motor power connection line and a portion of a second motor power connection line are located in the space between the first motor baseplate and the second motor baseplate. A first power receiving terminal of the first motor which is connected to the first motor power connection line is located at a rear portion of the first motor.