Inline Master Drive Unit Layout for Compact Vehicle Packaging
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Solution Overview
Problem
Traditional master drive units for vehicles with self-propulsion systems are space-inefficient and require complex precision machining due to their parallel design, which complicates spatial configuration and increases resource demand.
Innovation Solution
An inline master drive unit design where the traction motor, steering motor, and planetary steering system are mounted in series along a single stacking axis, reducing the unit's footprint and eliminating the need for precision machining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional parallel mounting design is used for traction drive and steering drive, then functional requirements are met, but space efficiency deteriorates and device complexity increases
Solution Approach 1:
The patent combines the traction drive and steering drive into a single integrated master drive unit with coaxial arrangement. The traction motor and steering motor share a common mounting interface and spatial envelope, merging two previously separate functional systems into one compact unit that satisfies both traction and steering requirements simultaneously.
Solution Approach 2:
The patent transitions from a parallel side-by-side mounting arrangement to a coaxial stacked arrangement along the vertical axis. This dimensional reorganization allows the traction drive and steering drive to be stacked one above the other rather than placed adjacent to each other, significantly improving space efficiency and simplifying the spatial configuration.
2Manufacturing precision
If precision machining is applied to main frame for mounting drives, then mounting accuracy is improved, but manufacturing complexity and resource demand increase
Solution Approach 1:
The master drive unit is designed with self-aligning features and inherent mechanical guidance that enable straightforward mounting without requiring high-precision machining of the main frame. The unit's own structure provides the necessary alignment and positioning, eliminating the need for complex precision machining operations on the vehicle chassis.
Solution Approach 2:
The patent separates the precision requirements from the main frame by making the master drive unit a self-contained modular assembly. All precision mounting requirements are contained within the unit itself rather than being transferred to the main frame, allowing the frame to be manufactured with standard tolerances while the unit maintains its internal precision through careful design of its own components and assembly features.
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
The inline design allows for a more compact master drive unit that increases space for other vehicle systems and enhances ergonomics while maintaining functionality for traction and steering.
Implementation Method 1
The planetary steering system may include a sun gear directly driven by the steering motor, three or more planet gears arranged around and in mesh with the sun gear, a ring gear circumferentially surrounding and in mesh with the planet gears
Data Source
AI summary
Systems are disclosed for a master drive unit including a traction motor, a steering motor, and a planetary steering system, wherein the traction motor, steering motor, and planetary steering system are mounted inline. The planetary steering system is a speed reduction system for reducing an output speed from the steering motor, whilst at the same time increasing output torque.