Electric Work Vehicle Motor-Pump Layout for Compact Hydraulics
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Solution Overview
Problem
Existing electric work vehicles with engine replacements using batteries and motors face challenges of large machine body size and significant power loss due to transmission mechanisms, which complicate the integration of hydraulic pumps for work devices.
Innovation Solution
A compact transmission mechanism is introduced, positioning the hydraulic pump close to the motor, eliminating the need for separate power transmission paths, and using a coupler for easy maintenance and noise reduction, supported by a single frame to reduce complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hydraulic pump is spaced far apart from the motor, then the transmission mechanism can be simplified, but the machine body becomes large-sized and power loss increases
Solution Approach 1:
The patent merges the motor and hydraulic pump into a closely integrated unit, positioning the hydraulic pump directly adjacent to the motor output shaft. This merging eliminates the need for complex intermediate transmission mechanisms while minimizing the distance between power source and hydraulic actuator, thereby reducing both machine body size and power transmission losses.
2Device complexity
If the hydraulic pump is spaced far apart from the motor, then the transmission mechanism can be simplified, but power loss during transmission increases
Solution Approach 1:
The patent merges the motor and hydraulic pump into a closely integrated unit, positioning the hydraulic pump directly adjacent to the motor output shaft. This merging eliminates the need for complex intermediate transmission mechanisms while minimizing the distance between power source and hydraulic actuator, thereby reducing both machine body size and power transmission losses.
3Adaptability or versatility
If a transmission mechanism is included to connect the motor to the hydraulic pump, then the hydraulic pump can be positioned independently, but the machine body becomes large-sized
Solution Approach 1:
The patent merges the motor and hydraulic pump into a closely integrated unit, positioning the hydraulic pump directly adjacent to the motor output shaft. This merging eliminates the need for complex intermediate transmission mechanisms while minimizing the distance between power source and hydraulic actuator, thereby reducing both machine body size and power transmission losses.
4Loss of energy
If the hydraulic pump is positioned close to the motor, then power loss is reduced, but the transmission mechanism becomes more complex
Solution Approach 1:
The patent merges the motor and hydraulic pump into a closely integrated unit, positioning the hydraulic pump directly adjacent to the motor output shaft. This merging eliminates the need for complex intermediate transmission mechanisms while minimizing the distance between power source and hydraulic actuator, thereby reducing both machine body size and power transmission losses.
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 smaller machine body with minimal power loss and simplified structure, enabling efficient operation of electric work vehicles with reduced noise and maintenance ease.
Implementation Method 1
a motor (M) drivable on electric power supplied by the battery (4)
Implementation Method 2
a hydraulic pump (60) drivable by the motor (M) to supply operating fluid to an operating mechanism of the work device (13)
Data Source
AI summary
An electric work vehicle includes a work device, a battery, a motor drivable on electric power supplied by the battery, a travel device drivable by the motor, and a hydraulic pump positioned next to the motor and drivable by the motor to supply operating fluid to an operating mechanism of the work device.