Power-assisted transmission mechanism for electric power-assisted bicycle

Abstract

The invention discloses a power-assisted transmission mechanism for an electric power-assisted bicycle, which is easy to accelerate and comfortable to ride. The transmission mechanism comprises a shell, a middle shaft, a main chain disk, a chain, a first bearing, a first one-way clutch, a power-assisted motor and a transmission chain disk, wherein the transmission chain disk is arranged on the power-assisted motor; the main chain disk is connected with the transmission chain disk through the chain and is provided with the first bearing; the middle shaft passes through the first bearing and isprovided with a torque cam mechanism with a resetting function; a driving wheel of the torque cam mechanism is fixedly connected with a sliding sleeve; a driven wheel is fixedly connected with the main chain disk; the first one-way clutch is arranged between the driving wheel and the middle shaft; a sensing device is arranged at a corresponding position of the sliding sleeve; and a signal processor is connected with the sensing device and the power-assisted motor through a circuit.

Description

Technical field: [0001] The invention relates to a power-assisted transmission mechanism of an electric power-assisted bicycle. Background technique: [0002] The definition given by the country of electric power-assisted bicycles is a bicycle that is mainly driven by the human body's physical fitness, and the motor is used as an auxiliary drive. At present, electric power-assisted bicycles on the market control the operation of the power-assisted motor through the pulse switch circuit to sense the riding situation of the rider. , but the current signal of the pulse circuit is a fast electric signal, and the signal processor will instruct the booster motor to accelerate quickly after receiving this fast electric signal, so the power-assisted bicycle using the pulse circuit will produce jerky acceleration during the riding process, which will affect the ride. Continuity and comfort of ride. [0003] In addition, due to structural reasons, no matter whether the center shaft o...

AI Technical Summary

Problems solved by technology

[0002] The definition given by the country of electric power-assisted bicycles is a bicycle that is mainly driven by the human body's physical fitness, and the motor is used as an auxiliary drive. At present, electric power-assisted bicycles on the market control the operation of the power-assisted motor through the pulse switch circuit to sense the riding situation of the rider. , but the current signal of the pulse circuit is a fast electric signal, and the signal processor will instruct the booster motor to accelerate quickly after receiving this fast electric signal, so the power-assisted bicycle using the pulse circuit will produce jerky acceleration during the riding process, which will affect the ride. Continuity and comfort

[0003] In addition, due to structural reasons, no matter whether the center shaft of a traditional power-assisted bicycle rotates clockwise or counterclockwise, the power-assisted motor rotates synchronously with the center shaft. Drive the power-assisted motor to rotate synchronously. At this time, the rotor of the motor cuts the magnetic force lines to generate ampere magnetic field resistance, and it is very difficult for people to ride.

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