Electric Work Vehicle Rear Housing Layout for PTO Power Integration
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Solution Overview
Problem
Existing electric work vehicles, such as electric tractors, face challenges in efficiently powering multiple components like rear wheels, PTO systems, and hydraulic systems, often leading to inefficiencies and complexity in design and operation.
Innovation Solution
A rear housing design that integrates multiple electric motors and gearings to drive rear wheels, a PTO system, and a hydraulic pump, with a centralized axis configuration and a parking assembly to enhance stability and operational flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple electric motors and gearings are integrated into a centralized rear housing configuration, then power distribution efficiency and operational flexibility are improved, but device complexity increases
Solution Approach 1:
The patent combines multiple electric motors (wheel motors and PTO motor) and their associated gearings into a single integrated rear housing assembly. This merging of previously separate powertrain components into one unified structure improves power distribution efficiency by reducing transmission losses and simplifying the powertrain architecture, while the modular housing design manages the inherent complexity through organized integration.
2Volume of moving object
If the motor axis is positioned above the PTO output shaft, then structural compactness and weight distribution are improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent positions the motor axis vertically above the PTO output shaft, utilizing the vertical dimension to achieve compact horizontal spacing. This vertical stacking arrangement reduces the overall footprint of the powertrain assembly in the horizontal plane, improving structural compactness. The design manages manufacturing precision challenges through precise mounting feature integration and alignment provisions built into the housing structure.
Data Source
AI summary
An electric work vehicle includes a rear housing, a motor to drive to a rear wheel through a gearing, the motor being supported by the rear housing, and a Power Take-Off (PTO) motor to drive a PTO output shaft, the PTO motor being supported by the rear housing. An axis of the motor is located above the PTO output shaft in an up-down direction of the electric work vehicle.