a bicycle

Abstract

Disclosed is a bicycle. A handlebar (1), a steering bar (7), a braking system, a bicycle frame, a front steering wheel (14), pedal plate driving devices, speed changing boxes (44) and rear driving wheels (45) are arranged on a bicycle body respectively, the front steering wheel (14) is mounted below the steering bar, the pedal plate driving devices and the speed changing boxes (44) are mounted on the bicycle frame, and the rear driving wheels (45) are disposed on output shafts of the speed changing boxes. The bicycle has the advantages that pedal plate driving parts (17) are added between pedal plates (22) and driving connecting rods (32), speed changing box driving parts (37) are added between the driving connecting rods (32) and driving shafts (42) of the speed changing boxes, two sets of independent pedal plate driving device driving systems are disposed under two pedal plates, and thereby, defects of a bicycle of Chinese patent number 201210084957.X can be overcome, for example, two speed-up boxes are arranged on left and right and output motive power to one shaft, twisting of output shafts can occur and one wheel can not contact with the ground during driving on uneven roads, the center of gravity of a user moves from side to side when the user treadles, instability is severe, pedaling self-moving is quite dangerous, personal safety is endangered, twisting of the output shafts can occur, the speed-up boxes can not work and the pedaling self-moving function can not be achieved.

Description

technical field [0001] The invention belongs to a bicycle, in particular to a bicycle that allows a user to step on a pedal up and down in a standing manner to drive the vehicle body forward, that is, to use the gravity of the person to rotate the wheels under the feet. Background technique [0002] The best and practical tool for traditional self-powered walking is the bicycle: it is widely used in the world, and the driving device of the bicycle is an important part of the bicycle. The usual driving device of the bicycle is to use a disc to drive the chain sprocket The structure relies on the two feet to rotate in a circle to drive the wheel connected to the flywheel to rotate forward. In order to make the two feet move in a circle, the buttocks must be erected, and the body is in an abnormal state, which is not convenient for exerting force. There is also a kind of scooter similar to that most of them use one foot to pedal the ground to obtain power. This traditional scoo...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the shortcomings of bicycles and self-driving sports cars in the prior art, and provide a bicycle in which the user steps on the pedals to drive the vehicle forward in a standing manner, so as to solve the problem that the automatic sports car in the prior art is not easy to drive. Pedaling is a bit laborious, and the output shaft will be twisted when encountering uneven roads during driving, making one of the wheels unable to contact the ground. If the output shaft is twisted, the gearbox will not work, etc.

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