Automatic stepless speed change device of bicycles

Abstract

The utility model discloses an automatic stepless speed change device of bicycles such as electric bicycles and electric auxiliary bicycles, wherein the bicycles are respectively provided with a power unit. The automatic stepless speed change device comprises a pedal shaft, an input shaft of the power unit, an output gear and a control system. The input shaft, the pedal shaft and the output gear are combined to form a planetary gear set, so that a specific relationship is formed among the rotation speeds of the input shaft, the pedal shaft and the output gear. The energy conservation law is cooperated, so that the control system can adjust the rotation speed and torsion of the input shaft to change the speed ratio of the input shaft, the pedal shaft and the output gear and to change the torsion which needs to be exerted on the pedal shaft, stepless speed changing is achieved, and various applications are achieved. In addition, the torsion of the input shaft of the power unit can be amplified. According to the automatic stepless speed change device, an automatic speed change device, a speed change device and the power unit are combined into a whole, and accordingly the weight and the size can be saved. When the speed is reduced or the bicycles get down a slope, wheels can drive the input shaft to rotate so as to generate power.

Description

technical field [0001] The invention relates to an automatic stepless speed change device for electric bicycles, electric auxiliary bicycles or bicycles assisted by other power devices. Background technique [0002] Bicycle is a very common means of transportation in today's society, and it only uses human power as a power source; and with the advancement of electric motors, it is not difficult to load electric motors on bicycles to propel vehicles, and bicycles loaded with electric motors are convenient. It is the so-called electric bicycle or electric assist bicycle; however, despite the addition of electric motors to reduce the burden on manpower, the original structure of bicycles has not changed correspondingly with the addition of electric motors and the advancement of mechanical systems. [0003] Even if it is an electric bicycle or an electric assisted bicycle, in order to facilitate riding, it is often equipped with a speed change device; The pedal force is used to...

AI Technical Summary

Problems solved by technology

[0008] Fourth, a one-way clutch device is provided between the electric motor and the toothed plate in the prior art to avoid mutual interference between the operation of the electric motor and the pedal shaft; however, such a structure also prevents the rotation of the wheel and the toothed plate from being fed back to the electric motor , so that the wheels cannot be used to drive the motor to generate electricity

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