Electric bicycle torque sensor device

Abstract

The invention discloses a torque sensing device for an electric bicycle, which comprises a central shaft, a chain plate sheathed on the central shaft, and a central shaft gear fixed to the chain plate; it is characterized in that a dial is fixed on the central shaft, so A radial elastic resetting member for bidirectional rotation and reset of the driving dial is provided between the dial and the central shaft gear. A magnetic induction ring is set on the central shaft, and a driven end cam is provided on the magnetic induction ring. The aforementioned dial A fader is fixed on the top, and the pusher is provided with an active end cam that cooperates with the driven end cam on the magnetic induction ring to drive the magnetic induction ring to move along the central axis. The elastic return part also includes a coil arranged on the periphery of the magnetic induction ring for inducing changes in magnetic flux. The sensing device can detect static and dynamic torque and has more stable and reliable working performance, and can also ensure zero startup of the electric bicycle during riding and maintain stable driving performance.

Description

technical field [0001] The invention relates to a torque sensor device for an electric bicycle. Background technique [0002] Electric bicycles are being increasingly used in my country because of their brisk, labor-saving and pollution-free characteristics. Traditional electric bicycles use the handle to adjust the speed, that is, use the handle to control the output power of the motor, but more and more electric bicycles mainly use torque sensors to convert the pedaling force of the foot when riding into a corresponding The voltage signal output is amplified by the motor control circuit board to control the operating power of the motor, which can greatly save energy. [0003] At present, most of the torque sensors used in electric bicycles are Hall speed sensors. This kind of sensor is pasted on the surface of rotating parts such as the center shaft or chain plate of the electric bicycle with magnetic steel, and Hall is installed on non-rotating parts such as the main sha...

AI Technical Summary

Problems solved by technology

This type of electric bicycle sensor has the following problems: 1. It cannot detect static and dynamic torque, and the measurement accuracy is poor. unnecessary discharge

2. The rotating parts such as the center shaft and the chain plate are easy to wear or tilt during the long-term use of the electric bicycle, resulting in a change in the position between the magnetic steel on it and the Hall element, making the output of the induced potential signal no longer accurate , the working stability and reliability of the sensor are greatly reduced

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