Electric Wagon Power Assist for Heavy Loads on Uneven Terrain
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Solution Overview
Problem
Existing wagons for outdoor activities are laborious to push and pull, especially when carrying heavy loads over uneven terrain.
Innovation Solution
An electric wagon equipped with a drive motor to rotate driving wheels and a power supply connection portion for detachable connection to a battery pack, providing electrical energy for assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional manual wagon is used for outdoor activities, then it can be easily manufactured and operated without power supply, but it becomes laborious to push and pull when carrying heavy loads over uneven terrain
Solution Approach 1:
The patent replaces the purely mechanical manual pushing/pulling system with an electromechanical system. A drive motor is integrated into the wagon's wheel assembly, powered by a removable battery pack, to provide powered assistance for maneuvering. This substitution of mechanical effort with electrical power directly reduces the force required by the user while improving ease of operation on varied terrain
2Ease of operation
If a drive motor and battery pack are added to create an electric wagon, then the effort required to maneuver is reduced, but the device complexity increases
Solution Approach 1:
The patent segments the power supply system from the main wagon body by using a removable battery pack that can be detached and reattached. This modular segmentation allows the complex powered components to be separated into independent units, making the overall system easier to manage, maintain, and store while still providing the benefits of powered assistance when needed
Solution Approach 2:
The battery pack is designed with universal compatibility features, including a standardized coupling portion that can interface with different wagon configurations. The drive motor system can operate in multiple modes (powered assistance, manual operation, regenerative braking), providing multi-functionality that justifies the added complexity through enhanced operational versatility
3Ease of operation
If the battery pack energy is increased to enhance power assistance, then the ease of operation improves, but the weight of the moving object increases
Solution Approach 1:
The patent implements dynamic power management where the drive motor provides variable assistance based on real-time operating conditions such as terrain slope, load weight, and user input. The system dynamically adjusts power delivery to provide maximum assistance when needed while conserving battery energy during flat or light-load conditions, effectively managing the weight-energy tradeoff through intelligent control
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 electric wagon reduces the effort required to maneuver heavy loads by providing electrical assistance, making it easier to use over varied outdoor terrains.
Implementation Method 1
drive motor configured to drive driving wheels to rotate
Implementation Method 2
power supply connection portion configured to be detachably connected to a battery pack for supplying power to the drive motor
Data Source
AI summary
Provided are an electric wagon and an electronically power assisted wagon. The electric wagon includes a wagon body including at least a foldable frame; a handle device connected to the wagon body; a walking assembly including at least driving wheels; a drive motor configured to drive the driving wheels to rotate; a power supply connection portion configured to be detachably connected to a battery pack for supplying power to the drive motor, and a controller electrically connected to at least the drive motor to control the drive motor to rotate.