Dual-Motor Wheel Loader Drive Without Distribution Gear
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Solution Overview
Problem
Existing mobile work machines, such as wheel loaders and excavators, face inefficiencies and cost issues due to the use of complex transmission systems and the need for additional gear components, which increase weight, space requirements, and energy consumption.
Innovation Solution
A mobile work machine design featuring two electric motors with an electrical energy storage system, allowing for direct drive to the wheels without a distribution gear, enabling novel operational modes and efficient energy use by varying motor power and torque combinations, and incorporating a hydrostatic drive engine for tool operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a complex transmission system with additional gear components is used, then high torque can be achieved, but weight increases
Solution Approach 1:
The patent removes the complex transmission system and additional gear components from the drive unit, extracting only the essential electric motors and power take-off elements. This eliminates unnecessary weight while maintaining torque delivery through direct motor-to-axle connection.
Solution Approach 2:
The patent replaces the mechanical transmission system with electric motors that directly drive the axles. The electric motors provide torque directly without requiring mechanical gearboxes, thereby reducing weight while maintaining the necessary force output.
2Force
If a complex transmission system with additional gear components is used, then high torque can be achieved, but installation space increases
Solution Approach 1:
The patent extracts and removes the complex transmission system and additional gear components, retaining only the essential electric motors and power take-off elements. This reduction eliminates the space required for unnecessary mechanical components.
Solution Approach 2:
The patent substitutes the mechanical transmission system with a compact electric motor arrangement that directly drives the axles. This electric drive system occupies significantly less installation space compared to the mechanical gearbox and transmission components it replaces.
3Force
If a complex transmission system with additional gear components is used, then high torque can be achieved, but device complexity increases
Solution Approach 1:
The patent extracts and removes the complex transmission system and additional gear components, retaining only the essential electric motors and power take-off elements. This simplification reduces device complexity while maintaining the necessary torque delivery capability.
Solution Approach 2:
The patent replaces the complex mechanical transmission system with a simpler electric motor arrangement. The electric motors directly drive the axles without requiring mechanical gearboxes, thereby reducing device complexity while maintaining torque output.
4Force
If a complex transmission system with additional gear components is used, then high torque can be achieved, but energy consumption increases
Solution Approach 1:
The patent replaces the mechanical transmission system with electric motors that directly drive the axles. Electric motors are more energy-efficient than mechanical transmissions, reducing energy losses and overall energy consumption while maintaining the necessary torque delivery.
Solution Approach 2:
The patent changes the drive system parameters from mechanical transmission to electric motor operation. This parameter change enables more efficient energy conversion and delivery, reducing energy consumption while maintaining or improving torque output characteristics.
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 reduces weight, installation space, and costs while providing efficient and versatile drive options for various work applications, enabling energy-efficient operation and high torque requirements without the need for additional gear components.
Implementation Method 1
with at least one first electric motor (7) and one second electric motor (7) as well as at least one electrical energy storage device (4) for storing electrical energy at least for the electric motors (7)
Implementation Method 2
wherein the drive unit comprises at least one hydrostatic drive motor driven by the electric motor for driving the drive element and/or the work tool
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A mobile working machine (1) with a vehicle frame (3) and with a drive unit for driving at least a first drive element (5) and a second drive element (5) is proposed, wherein at least a first electric motor (7) and a second electric motor (7) as well as at least one electrical energy storage device (4) for storing electrical energy at least for the electric motors (7) are provided, wherein the drive unit comprises at least the first electric motor (7), wherein at least one control unit (12, 17, 21, 23) for electrical and/or electronic control of the electric motors (7) and/or the energy storage device (4) is provided, which at least partially improves the disadvantages of the prior art, in particular an optimization of the vehicle's center of gravity and/or weight distribution and/or a drive system with novel operating modes.According to the invention, this is achieved by the drive unit comprising at least the first electric motor (7) for driving the first drive element (5) and the second electric motor (7) for driving the second drive element (5).