High-precision detecting device for electric bicycle middle axle bilateral foot power

Abstract

The invention discloses a high-precision detecting device for electric bicycle middle axle bilateral foot power. The high-precision detecting device for the electric bicycle middle axle bilateral footpower comprises a middle axle arranged in a bottom bracket, a chain wheel and cranks at two ends, wherein the chain wheel and the cranks at the two ends are mounted on the middle axle. The high-precision detecting device for the electric bicycle middle axle bilateral foot power further comprises torque strain gages pasted on the middle axle and an electric bicycle controller electrically connected with the torque strain gages. The high-precision detecting device for the electric bicycle middle axle bilateral foot power is characterized in that a chain wheel axle sleeve located on the inner side of the crank and close to the crank at one end is arranged on the middle axle in a sleeving mode, wherein the chain wheel axle sleeve is matched with a spline, the chain wheel is fixed to the chainwheel axle sleeve, the two torque strain gages corresponding to the cranks at the two ends are pasted on the middle axle, and the two torque strain gages are correspondingly arranged on the two sidesof the spline on the middle axle in the axial direction. According to the high-precision detecting device for the electric bicycle middle axle bilateral foot power, the torque strain gage on the chain wheel side can detect torque of a crank aspect directly applying on the middle axle in advance, without interference of the chain wheel aspect is achieved, detected data is more accuracy, therefore,detection differences between the two torque strain gages are reduced, the judgment accuracy of middle axle two end foot power signals is improved, the maintenance of the continuity of the signals isfacilitated, and thus, the riding quality is greatly improved.

Description

technical field [0001] The invention relates to a high-precision detection device for pedaling force on both sides of the center shaft of an electric bicycle. Background technique [0002] At present, the pedal force detection device is usually installed on the central axis of electric bicycles to detect the pedal force signal in real time, and accurately determine the riding state of the rider (light pedal or heavy pedal) according to the pedal force signal, so as to drive the motor for power output Adjustment. [0003] As we all know, since the pedal of an automatic vehicle is installed on the crank, and the crank is connected to the central shaft, the most direct way to measure the pedaling force is to measure the torque of the central shaft, and the sensing element used is a torque strain gauge. Therefore, the more common current solution for pedal force detection is usually to attach two torque strain gauges corresponding to the left and right torques on the center sha...

AI Technical Summary

Problems solved by technology

However, the shortcomings of this sensing mechanism are also obvious. The pedaling force at both ends of the bottom bracket, especially the pedaling force on the chainring side, is essentially an analog value obtained after the internal calculation of the processor, which is different from the value obtained by direct measurement. there is still a gap between

And from the perspective of mechanical assembly structure, it still does not solve the problem of the difference in force transmission at both ends of the center shaft, and the crank side will still introduce interference factors during actual testing

In addition, there are many applications of sensing elements in this sensing mechanism, which also increases the production cost accordingly.

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