Intermediately-arranged double-motor small-tooth-difference planet gear speed changing device for bicycle

Abstract

An intermediately-arranged double-motor small-tooth-difference planet gear speed changing device for a bicycle is mainly arranged on the bicycle in a matched manner. The device comprises a shell rotationally pivoted to a crankshaft of the bicycle, a small-tooth-difference planet gear set, a power assisting motor and a speed changing motor, wherein the small-tooth-difference planet gear set is mainly provided with an inner gear ring, two outer gear rings, a double-eccentric-shaft sleeve, a supporting disc, multiple transmission pins and an output disc; the crankshaft is sleeved with the inner gear ring in the manner that a first isolator can rotate in one direction and rotationally sleeved with the double-eccentric-shaft sleeve, the double-eccentric-shaft sleeve is rotationally sleeved with the supporting disc, the crankshaft is rotationally sleeved with the output disc, and the output disc is connected to an intermediately-arranged tooth disc of the bicycle; the power assisting motor is arranged in the shell and connected to the inner gear ring; and the speed changing motor is arranged in the shell and connected to the double-eccentric-shaft sleeve.

Description

technical field [0001] The invention is related to the stepless speed change technology of bicycles, in particular to a planetary gear speed change device with double motors in the middle and small tooth difference of the bicycle. Background technique [0002] The known planetary gear set mainly consists of a sun gear, an internal ring gear and a planetary gear carrier set. Patent No. WO 2011 / 069722 A1 discloses a technology in which a planetary gear set is applied to a bicycle as a continuously variable transmission. [0003] In the above case, the ring gear and the sun gear are the input and the planetary gear carrier set is the output. Although such a structure can achieve the effect of stepless speed change by controlling the speed difference between the ring gear and the sun gear, however, the mechanical driving power of this case is generated based on the pedaling force, so In this way, when the mechanical driving force is greater than the rider's pedaling force, the...

AI Technical Summary

Problems solved by technology

Although such a structure can achieve the effect of stepless speed change by controlling the speed difference between the ring gear and the sun gear, however, the mechanical driving power of this case is generated based on the pedaling force, so In this way, when the mechanical driving force is greater than the rider's pedaling force, the rider's pedaling action will encounter the reverse push of the driving force, which will cause the rider's pedaling action to be reversed or unable to pedal , the rider will feel uncomfortable

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