Three-Wheel Electric Dumper Vehicle Center of Gravity Stability
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Solution Overview
Problem
Current dumper vehicles face challenges in stability, especially on uneven terrain, and require heavy counterweights to balance loads, making them difficult to maneuver and transport, particularly in indoor environments where zero emissions and low noise are necessary, with no 1-tonne capacity vehicles meeting these requirements.
Innovation Solution
A three-wheeled zero-emission electric dumper vehicle with a chassis supporting two fixed front wheels and a single steering rear wheel, all driven by electric motors, maintaining the center of gravity within a triangular contact area, allowing operation on gradients up to 45% and in confined spaces, with a load-carrying capacity of 0.5 to 2 tonnes, and equipped with a hydraulic system for load handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If heavy counterweights are added to balance loads, then vehicle stability is improved, but vehicle portability and ease of transport deteriorate
Solution Approach 1:
The patent applies counterweight principle by positioning heavy components (batteries, motor, hydraulic system) strategically to create a counterbalancing moment against the load moment. The rearward placement of the battery pack and hydraulic system generates a righting moment that compensates for the overturning effect of loads picked up outside the base area, eliminating the need for separate counterweights while maintaining stability.
Solution Approach 2:
The patent shifts the stability solution from vertical dimension (adding weight) to longitudinal dimension (component positioning). By strategically locating heavy components along the vehicle's length, particularly behind the axle, the design creates a balancing moment arm that offsets load moments without increasing overall vehicle weight.
2Ease of operation
If vehicle size is reduced for manoeuvrability in confined spaces, then ease of operation is improved, but stability on uneven terrain deteriorates
Solution Approach 1:
The patent applies local quality by concentrating heavy components (batteries, motor, hydraulic system) in specific locations rather than distributing weight evenly. The battery pack is positioned in the rear central portion, the motor at the front, and the hydraulic system at the rear, creating localized weight concentrations that generate stabilizing moments while keeping the overall vehicle compact for manoeuvrability.
3Stability of the object's composition
If dead weight is increased to compensate for load moment, then vehicle stability is improved, but power requirements and resistance to motion increase
Solution Approach 1:
The patent uses the counterweight principle by positioning the battery pack and hydraulic system to create a righting moment that balances the load moment. This strategic component placement provides stability through moment balancing rather than through increased dead weight, thereby reducing the energy required for acceleration and braking while maintaining vehicle stability.
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 vehicle achieves stability and maneuverability in both indoor and outdoor environments, meets zero-emission and low-noise regulations, and eliminates the need for counterweights, enhancing portability and operational efficiency.
Implementation Method 1
both front wheels and the rear wheel being individually driven by electric motors
Implementation Method 2
equipped with a hydraulic system for load handling
Implementation Method 3
maintaining the center of gravity within a triangular contact area
Data Source
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AI summary
The present teaching provides a three wheel zero emission dumper vehicle (100), the vehicle comprising a chassis (150), the chassis supporting: two fixed front wheels (180), a single steering rear wheel (190), and a load carrying assembly, wherein the vehicle is configured such that a distribution of weight supported by the chassis is such that a centre of gravity of the vehicle is maintained within a triangle formed by the contact of the wheels on the ground in both loaded and unloaded states of the load carrying assembly.