Torque detection and transmission device and electric bicycle built-in motor applying torque detection and transmission device

Abstract

The invention relates to a torque detection and transmission device. The torque detection and transmission device includes a planet frame, a left side planet wheel, a right side planet wheel, a left side sun wheel, a right side sun wheel and a torque signal converter. The left side sun wheel is fixed through a rotating stopping ring. The planet frame, the left side planet wheel, the right side planet wheel, the left side sun wheel and the right side sun wheel constitute a planet frame output torque transmission mechanism, wherein the revolution direction and rotation direction of the planet wheels are the same. An electric bicycle built-in motor applies the torque detection and transmission device, and the planet frame, the left side planet wheel, the right side planet wheel, the left sidesun wheel and the right side sun wheel constitute the planet frame output torque transmission mechanism, wherein the revolution direction and rotation direction of the planet wheels are the same. Oneend of the left side sun wheel is in keyed joint with an elastic sleeve, the other end of the elastic sleeve is in keyed joint with the rotating stopping ring, the torque signal converter is arrangedon the elastic sleeve in a sleeving mode, and a torque signal converter structure which is fixed and cannot rotate is formed. The torque detection and transmission device has the beneficial effects that by using the torque signal converter structure which is fixed and cannot rotate, the work power of a rider can be accurately calculated, the booster power of the motor can be matched well, the reliability of a sensor is improved, and the overall size of the built-in motor is reduced greatly.

Description

technical field [0001] The invention belongs to a mid-mounted motor of a power-assisted electric bicycle, in particular to a torque detection transmission device and a mid-mounted motor of an electric bicycle using the device. Background technique [0002] At present, the central motor of electric bicycles can be divided into two types according to the power assist signal mode. One is a speed-type power-assisted mid-mounted motor using a speed sensor, which indirectly estimates the rider's work power according to the rider's pedaling speed, and then controls the motor's power-assisted power. The speed boosting method has a simple structure and low cost, but the boosting effect is relatively poor. The other is a torque-type power-assisted mid-mounted motor that uses a torque sensor. Since the torque sensor directly senses the rider's pedaling torque, it can accurately calculate the rider's work power and riding intention, and match the power of the motor to achieve the best ...

AI Technical Summary

Problems solved by technology

The above-mentioned technical solution achieves the purpose of improving reliability and reducing cost, but the volume and size of the motor increase, and the approximate size of the motor is length×width×thickness=230×140×100mm, (volume 3.2×10 6 mm 3 ) is relatively bulky and cannot meet the market demand for miniaturization and light weight

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