Chainless Hybrid E-Bike Powertrain Without Chain Maintenance
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Solution Overview
Problem
Existing electric bicycles with mechanical transmission structures using chains and chainrings face issues such as chain falling off, rider clothing entanglement, and the need for regular maintenance of these components.
Innovation Solution
A chainless hybrid electric bicycle that employs a pedal planetary generator, a battery pack, a driving motor, and a manual switch, eliminating the need for traditional mechanical transmission components like chains and chainrings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mechanical transmission components (chains and chainrings) are used, then power transmission function is achieved, but reliability deteriorates due to chain falling off and component entanglement
Solution Approach 1:
The patent extracts and removes the chain and chainring components from the bicycle transmission system, replacing them with a direct drive mechanism where the motor connects directly to the wheel hub, thereby eliminating the harmful factors of chain falling off and clothing entanglement
Solution Approach 2:
The patent replaces the mechanical chain transmission system with an electric direct drive system, where the motor's rotational force is transmitted directly to the wheel through the hub, substituting mechanical chain engagement with electromagnetic drive
2Ease of manufacture
If traditional mechanical transmission components (chains and chainrings) are used, then power transmission is achieved, but maintenance requirements increase
Solution Approach 1:
By removing the chain and chainring components entirely from the system, the patent eliminates the maintenance requirements associated with these parts, such as lubrication, tension adjustment, and replacement
Solution Approach 2:
The direct drive system requires no external maintenance intervention for transmission components, as the motor and hub assembly operates without wear-prone mechanical linkages that need regular servicing
3Adaptability or versatility
If electric motor and battery are added to existing bicycle, then power assistance function is achieved, but device complexity increases
Solution Approach 1:
The patent merges the motor, battery, generator, and wheel hub into an integrated assembly where the motor is mounted directly on the bicycle frame and connects to the wheel hub, reducing the number of separate components compared to traditional systems
Solution Approach 2:
The manual switch integrates multiple functions into a single control component, allowing the rider to select between different power sources (battery or generator) and operating modes (electric or manual), thereby providing hybrid power capability without adding separate control systems
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 chainless design reduces the risk of mechanical failures, eliminates maintenance needs for chain components, and provides a hybrid power system allowing riders to choose between pedal-generated and battery-powered propulsion.
Implementation Method 1
The generator generates an electric power when the rider works the pedals
Implementation Method 2
The battery pack is electrically connected to the generator for storing the electric power generated by the generator
Implementation Method 3
The driving motor is rotated by the electric power from the generator or the battery pack to drive the wheels to run
Data Source
AI summary
A chainless hybrid electric bicycle includes a bicycle body. A generator, a battery pack, a driving motor and a manual switch are mounted on the bicycle body. The generator is coaxially mounted with the pedal transmission unit, so that the generator generates an electric power when the rider works the pedals. The battery pack is electrically connected to the generator for storing the electric power generated by the generator. The driving motor drives the wheels of the bicycle body to run. The rider selects the electric power from the generator or the battery pack through the manual switch to drive the driving motor to run, which in turn drives the bicycle body to move forward. The chainless hybrid electric bicycle has the advantage of a hybrid power drive system, without using traditional mechanical transmission components such as chains and chainrings.