Electric Scooter Rear Wheel Freewheel for Lightweight Portability
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Solution Overview
Problem
Conventional electric scooters with large electric motors and batteries are heavy, limiting portability and convenience, and those with non-freewheeling wheels face issues like unwanted noise and difficulty in movement when unpowered.
Innovation Solution
Designing an electric scooter with a small motor and battery, incorporating a one-way bearing connector in the rear wheel to allow freewheeling in one direction, reducing noise and enabling easy movement without power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If large electric motors and batteries are used to power the scooter, then the scooter can provide sufficient power and speed, but the weight of the scooter increases significantly, limiting portability
Solution Approach 1:
The patent applies dynamics by implementing a one-way bearing connector that allows the rear wheel to freewheel in one direction (when not powered) while being driven in the opposite direction (when powered). This dynamic mechanism enables the scooter to switch between powered and unpowered states, reducing the need for large motors and batteries while maintaining adequate power delivery when needed.
2Ease of operation
If the rear wheel is designed to be driven only (without freewheeling capability), then the scooter can be controlled during braking, but the wheel cannot move freely when unpowered, causing noise and difficulty in movement
Solution Approach 1:
The one-way bearing connector enables the rear wheel to dynamically switch between being driven and freewheeling based on operational needs. When braking, the wheel can be controlled; when unpowered, it can freewheel freely, eliminating noise and friction issues associated with non-freewheeling designs.
Solution Approach 2:
The one-way bearing connector acts as an intermediary mechanism between the driven wheel and the ground. It mediates the interaction by allowing free rotation in one direction while maintaining drive capability in the opposite direction, thus resolving the conflict between braking control and noise reduction.
3Stability of the object's composition
If a non-freewheeling driven wheel is used, then the scooter can maintain steady motion when powered, but the scooter becomes difficult to move or transport when unpowered
Solution Approach 1:
The one-way bearing connector provides dynamic adaptability, allowing the rear wheel to function as a driven wheel during powered operation (providing stability) and as a freewheel during unpowered transport (providing ease of movement). This dynamic switching capability resolves the contradiction between motion stability and transportability.
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 solution results in a lightweight, portable, and cost-effective electric scooter that can be easily transported and operated silently in both powered and unpowered modes.
Implementation Method 1
incorporating a one-way bearing connector in the rear wheel to allow freewheeling in one direction
Implementation Method 2
Designing an electric scooter with a small motor and battery
Implementation Method 3
Designing an electric scooter with a small motor and battery
Data Source
AI summary
Various personal mobility vehicles, such as scooters, are disclosed. The scooter can include at least one battery and motor for powering at least one driven wheel. The vehicle can include a gear assembly to convert a torque produced by the motor to a different torque to a driven shaft to power the at least one driven wheel. The battery can be removable.