Torque detection transmission device and electric bicycle mid-mounted motor using the same

Abstract

The invention relates to a torque detection transmission device, comprising a planet carrier, left and right planet gears, left and right sun gears and a torque signal converter. , The right sun gear constitutes the planetary carrier output torque transmission mechanism with the planetary gear revolving in the same direction as the autotransmission. The central motor of the electric bicycle using this device is composed of a planet carrier, left and right planet wheels, and left and right sun gears to form a planet carrier output torque transmission mechanism with the same planetary revolution and autobiography direction; one end of the left sun wheel is keyed with elastic The sleeve, the other end of the elastic sleeve is keyed with an anti-rotation ring, and the torque signal converter is sleeved on the elastic sleeve to form a fixed and non-rotating torque signal converter structure. Beneficial effects: The cyclist's work power can be accurately calculated by using the fixed torque signal converter structure, the motor assist power can be well matched, the reliability of the sensor is improved, and the overall size of the central motor is greatly reduced.

Description

technical field [0001] The invention belongs to a power-assisted electric bicycle mid-position motor, in particular to a torque detection transmission device and an electric bicycle mid-position motor using the same. Background technique [0002] At present, the central motor of electric bicycles can be divided into two types according to the way of power assist signal. One is a speed-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-assisting power. The speed boosting method has a simple structure and low cost, but the boosting effect is poor. The other is a torque-assisted mid-mounted motor using a torque sensor. Since the torque sensor directly senses the pedaling torque of the rider, it can accurately calculate the rider’s power and riding intention, and match the motor’s assist power well. Best power-assisted riding effect. The known torque ty...

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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