Electric bicycle center shaft force moment sensing device

Abstract

The invention discloses an electric bicycle center shaft force moment sensing device which comprises a center shaft arranged in a five-way tube through a bearing, a crank fixed on the center shaft and a crankset sleeved on the center shaft. The electric bicycle center shaft force moment sensing device is characterized by further comprising a force moment sensing Hall component. The component comprises an elastic twist component connected with the center shaft and the crankset. Force moment sensing magnetic steel generating circumferential displacement through twist of the elastic twist component is fixed on the elastic twist component. The electric bicycle center shaft force moment sensing device further comprises a force moment sensing Hall element corresponding to the force moment sensing magnetic steel and fixed on the center shaft. The force moment sensing Hall element is electrically connected with a motor control circuit board through a collecting ring wire outlet device arranged between the center shaft and an inner wall of the five-way tube and the motor control circuit board is electrically connected with a motor. The electric bicycle center shaft force moment sensing device is high in flexibility and accuracy and capable of detecting static torque and dynamic torque, guaranteeing zero start when an electric bicycle is ridden and maintaining stable riding performance.

Description

technical field [0001] The invention belongs to the technical field of torque sensors, and in particular relates to a torque 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. At present, 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 t...

AI Technical Summary

Problems solved by technology

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

2. Since the magnetic steel is not installed on the effective force-bearing part of the central shaft, the displacement change caused by the torsion is not obvious, and it is often obvious at low speeds, but not at high speeds, so the induced potential signal The output is inaccurate, and the working stability and reliability of the sensor are greatly reduced

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