A New Bicycle Sprocket Structure

Abstract

The invention discloses a novel bicycle chain wheel structure and relates to the field of bicycles. The novel bicycle chain wheel structure comprises a first crank arm, a second crank arm, a shaft, a first cup-shaped object, a second cup-shaped object, a first bearing device, a second bearing device, a first cushion ring and a second cushion ring. According to the novel bicycle chain wheel structure, novel crank locking structure and bearing mounting structure are adopted, and the bearing devices are arranged in a crank, so that the transverse size of a chain wheel is reduced; a novel stress structure is adopted, and the shaft part is not in contact with bearings, so that the bending moment on the shaft part is relatively small, the deformation is reduced, and the integral rigidity of the chain wheel structure is improved.

Description

[0001] Technical field: [0002] The invention relates to the field of bicycles, in particular to a novel bicycle sprocket structure. [0003] Background technique: [0004] Cycling is becoming an increasingly popular form of recreation as well as a mode of transportation. Moreover, cycling has become a very popular competitive sport among both amateurs and professionals. Whether the bicycle is used for recreation, transportation or competition, the bicycle industry is constantly improving the various components of the bicycle, making the bicycle easier to assemble and less expensive. [0005] One specific part of the bike that has been heavily redesigned over the past few years is the bike's front sprocket construction. The front sprocket wheel of the bicycle is installed on the bottom bracket tube of the bicycle frame through the central shaft, and the crank arm shaft of the central shaft rotates relative to the bottom bracket tube of the bicycle frame. Each end of the cra...

AI Technical Summary

Problems solved by technology

As the name suggests, the sprocket structure with external bearings is to place the bearing device outside the bottom bracket tube of the frame, so that the lateral dimension of the front sprocket shaft is increased, and the distance between the pedal mounting surfaces of the left crank arm and the right crank arm is also reduced. As a result, when some cyclists are pedaling, the distance between the feet is too large, causing joint wear and muscle tissue fatigue

It also causes some cyclists to easily rub against the outside of the crank on the inside of the ankle or the inside of the shoe when pedaling

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