An electric bicycle torque detection device

Abstract

The invention provides an electric bicycle torque detecting device which comprises an outer cylinder, an eccentric sleeve and a middle shaft. The eccentric sleeve is installed in the outer cylinder through an eccentric sleeve bearing, the middle shaft is installed in the eccentric sleeve through a middle shaft bearing and can rotate, and the outer cylinder is fixed to a bicycle frame. a contact plane A parallel to the axis exists in the outer circle axis direction of the eccentric sleeve, and the outer circle axis of the eccentric sleeve does not coincide with the inner hole axis of the eccentric sleeve, namely an eccentric distance exists in the vertical direction of a radial force to which the outer circle axis and the inner hole axis are subjected on the middle shaft. A sensor head is fixed at one end of the eccentric sleeve, a pre-blocking plate is installed besides the sensor head, a Hall sensor is put in the middle of the sensor head, and an adjustable radial force preset device is additionally installed at the axial contact plane A of the eccentric sleeve and enables the sensor head to be in contact with the pre-blocking plate. The Hall sensor is located in the middle of the sensor head, an output signal of the Hall sensor is zero, when an effort acts on a bicycle pedal plate, the sensor head rotates with the eccentric sleeve, the Hall sensor deviates from the middle of the sensor head and outputs a variable voltage signal, and when the human pressure acting on the bicycle pedal plate is FN, a torque T is equal to FN*L.

Description

technical field [0001] The invention relates to the technical field of electric bicycles, in particular to an electric bicycle torque detection device. Background technique [0002] As a green and environmentally friendly means of transportation, electric bicycles have developed rapidly in my country in recent years, and the number of electric bicycles in China has exceeded 140 million. According to the driving mode, electric bicycles are mainly divided into full electric drive and proportional power assist drive. The all-electrically driven bicycle runs under the drive of the drive motor after the person turns the handle. In contrast, the proportional power-assisted drive bicycle senses the pedaling force of the person riding through the torque sensor or the speed sensor measures the driving speed, comprehensively controls the output power of the driving motor, and reasonably adjusts the driving power of the driving motor and the driving power of human pedaling. Proportio...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of poor linearity of the torque sensor signal, the present invention provides a torque detection device for electric bicycles. By rationally arranging the torque detection mechanism on the central axis of the electric bicycle, it is possible to detect in real time the force of human feet acting on the pedals. The size of the torque is output in the form of a voltage signal, which is used for electric power-assisted control. It has the advantages of high integration and high measurement accuracy. It has a high cost performance in practical applications and can be easily installed in various power-assisted functions. Electric bicycles are convenient for mass production and marketing

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