Torque Detection Mechanism for Electric Bicycle Drive Assembly
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Solution Overview
Problem
Conventional electric bicycles lack active torque-based control for their electric motors, leading to potential rider distraction and increased component complexity, which results in inefficient power assistance and impractical pedal spacing.
Innovation Solution
An electric bicycle drive assembly with a torque detection mechanism coupled to the pedal axle, which generates a signal to activate an electric machine assembly via a clutch mechanism and sleeve member, allowing for synchronized human and electrical power assistance without requiring rider operation of a controller, while reducing component count and size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a controller is mounted on the handlebar for active control of the electric motor, then the rider can control motor activation, but the rider becomes distracted from road conditions and cannot operate the controller timely
Solution Approach 1:
The system uses the pedal axle's own rotation to automatically detect torque and control motor activation without requiring rider intervention. The torque detection mechanism converts mechanical torque into electrical signals that automatically trigger the controller, allowing the system to serve itself rather than requiring external operation.
Solution Approach 2:
The patent replaces the manual mechanical control system with an automated electromechanical system. A torque detection mechanism converts mechanical torque from the pedal axle into electrical signals, which are then processed by a controller to activate the motor, substituting manual mechanical operation with automated sensor-based control.
2Power
If transmission components are arranged and assembled in sequence, then the power transmission function is achieved, but the structure becomes complex and the size increases
Solution Approach 1:
The patent merges multiple transmission components into a single integrated assembly. The torque detection mechanism, clutch mechanism, and sleeve member are combined into one compact unit that performs multiple functions simultaneously, reducing the overall number of separate components and simplifying the transmission structure.
Solution Approach 2:
The patent employs a nested arrangement where the torque detection mechanism, clutch mechanism, and sleeve member are arranged concentrically around the pedal axle. This nested configuration allows multiple components to occupy the same radial space, reducing the overall size and simplifying the transmission assembly.
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
Enables timely and efficient activation of the electric motor based on pedaling torque, reducing rider distraction, simplifying the structure, and optimizing pedal spacing, thereby enhancing riding efficiency and safety while minimizing physical effort.
Implementation Method 1
The torque detection element detects a variation of the sensing section to generate a signal
Data Source
AI summary
Disclosed is an electric bicycle drive assembly with torque detection, including a torque detection mechanism, a clutch mechanism, a sleeve member, a pedal axle, and an electric machine assembly. The electric machine assembly is coupled to a seat, and the seat is mounted a vehicle frame. The torque detection mechanism, the clutch mechanism, and the sleeve member are assembled in sequence with the pedal axle extending therethrough and are arranged inside the seat. In case that the pedal axle is operable to drive the torque detection mechanism to rotate, when the torque detection mechanism detects a torque, a signal is generated and fed to a controller module to activate the electric machine assembly, such that the electric machine assembly drives the sleeve member and the clutch mechanism to rotate and the clutch mechanism in turn drives a toothed wheel of a bicycle to rotate.