Electric Bicycle Center Axle Torsion Sensing Device

Abstract

The invention discloses a torsion force sensing device for a central shaft of an electric bicycle. The torsion force sensing device for the central shaft of the electric bicycle comprises a five-way tube and a central shaft rotatably assembled in the five-way tube and is characterized in that a magnet ring is arranged on the central shaft in a fixed or an integrated mode, a plurality of magnetic poles are arranged on the top edge circumference of the magnet ring at equal intervals, S and N poles of the plurality of magnetic poles are configurated alternatively, the central shaft is provided with an elastic twisting body which is driven by the central shaft to rotate, a separation ring is arranged on the elastic twisting body in a fixed or an integrated mode, the separation ring is sleeved on the magnet ring, and a plurality of windows which are used for magnetizing are arranged on the top edge circumference of the elastic ring at equal intervals. The twisting force sensing device for the central shaft of the electric bicycle further comprises a coil which is fixed in the five-way tube, located on the outer periphery of the separation ring and is used for sensing changes of magnetic flux, an outgoing wire of the coil is connected with a motor control circuit board of the electric bicycle in an electric mode, and the motor control circuit board is connected with a motor in an electric mode. By means of the torsion force sensing device for the central shaft of the electric bicycle, the sensitivity and accuracy of signal perception are high, static and dynamic torsion moment can be detected, the working performance is stable and reliable, and the fact that the electric bicycle is zero started in the riding process and the riding performance is stable are guaranteed.

Description

technical field [0001] The invention relates to a torsion sensor device for the center shaft of an electric bicycle. Background technique [0002] Electric bicycles are being increasingly used in my country because of their brisk, labor-saving and pollution-free features. 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 uses magnetic steel to paste on the surface of rotating parts such as the center shaft or flywheel of the electric bicycle, and Hall elements are installed on non-rotating parts ...

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. Rotating parts such as the center shaft and flywheel are easy to wear or tilt during the long-term use of the electric bicycle, resulting in changes 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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