Power assisting bicycle and drive device thereof

Abstract

The invention relates to a power assisting bicycle and a drive device thereof. The drive device comprises a seat used for being fixedly arranged on a bicycle body, and a motor body rotationally arranged on the seat. The motor body comprises a stator and a rotor which are in rotation fit, the stator and the seat are in rotation fit, the motor body can rotate around the seat, and the axis, rotating around the seat, of the motor body deviates from the axis, rotating around the stator, of the rotor. When the motor body is electrified and the rotor rotates around the stator, the motor body is driven to swing on the seat through reverse acting force, accordingly, the rotor can abut against a wheel of the bicycle, the wheel is driven to rotate, intervention of other outer force cannot happen in the rotation starting process of the wheel, and rapidness and smoothness are achieved. When the rotor is separated from the wheel, inference and influences cannot be caused to the rotation speed of the wheel. The rotor directly drives the wheel to rotate, rotation of the wheel is completely decided through rotation of the rotor, and wheels different in size can run at the same speed under driving of the motor body.

Description

technical field [0001] The invention relates to the field of bicycles, more specifically, to an assist bicycle and a driving device thereof. Background technique [0002] The motor of the power-assisted bicycle in the related art is usually arranged on the rotating shaft of the wheel. If the motor drives the large-sized wheel to rotate, the external resistance will be relatively large, and the torque requirement of the motor will be higher, which will also increase the output of electric energy. [0003] In addition, when the same motor is applied to wheels of different sizes, the motor will make one revolution at the same time, and the larger wheels will travel farther, while the smaller wheels will travel a shorter distance, resulting in loss of motor power in disguise. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide an improved power-assisted bicycle and its driving device. [0005] The technical solution ado...

AI Technical Summary

Problems solved by technology

[0002] The motor of the power-assisted bicycle in the related art is usually arranged on the rotating shaft of the wheel. If the motor drives the large-sized wheel to rotate, the external resistance will be greater, and the torque requirement of the motor will be higher, which will also increase the output of electric energy.

[0003] In addition, when the same motor is applied to wheels of different sizes, the motor will make one revolution at the same time, and the larger wheels will travel farther, while the smaller wheels will travel a shorter distance, resulting in loss of motor power in disguise.

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