Bicycle gear

Abstract

The invention discloses an efficient bicycle gear, which comprises a converter arranged on a bicycle frame. The transmission shaft of the converter extends out from the two ends and is respectively provided with a left pedal rod and a right pedal rod on the two ends, the extension end of the transmission shaft of the converter is also provided with a drive gear, and the drive gear is engaged with a driven gear arranged on the end of a drive sprocket shaft. In the structure of the converter, a left shaft sleeve and a right shaft sleeve are respectively supported on the two sides of the transmission shaft through a first bearing and a second bearing, wherein the left pedal rod is fixed on the left shaft sleeve, the right pedal rod is fixed on the right shaft sleeve, and the left pedal rod and the right pedal rod are arranged to be staggered for a certain angle; the outer edges of the left shaft sleeve and the right shaft sleeve are respectively supported in a shell through a third bearing and a fourth bearing; and the opposite sides of the left shaft sleeve and the right shaft sleeve are respectively provided with a one-way transmission clutch, the driving links of the one-way transmission clutches are respectively connected with a driving bevel gear, and the two driving bevel gears are both engaged with one driven bevel gear.

Description

technical field [0001] The invention relates to a bicycle transmission device, in particular to a new type of bicycle transmission device which uses the reciprocating swing mode of the pedal rod instead of the rotation of the traditional bicycle pedal rod. Background technique [0002] The bicycle has undergone many changes since its invention in 1791, the purpose of which is to make it more ergonomic and convenient to use. By 1892, France had issued 1,000 patent certificates for bicycles, 2,400 in the United Kingdom, and 4,000 in the United States. [0003] The transmission device of bicycle mainly contains three kinds at present: 1, chain transmission, 2, shaft transmission, 3, belt transmission. [0004] Among them, the chain drive is the most common and the most widely used. The chain drive is mainly composed of pedals, center shafts, sprockets, cranks, chains, flywheels, rear axles, rear wheels and other components. The pedals are assembled on the left and right crank...

AI Technical Summary

Problems solved by technology

[0005] But no matter what kind of transmission device, the rider's feet are required to complete the rotation movement in the vertical plane, that is, the left and right cranks must be stepped on to complete the circular motion to realize power transmission. However, when the rider's feet step on the left and right cranks When the circular motion is completed, the cyclist experiences energy loss in the process of doing work. This loss is due to the fact that the power of the cyclist's legs is vertically downward, but the pedals acted by this force need to complete the rotational motion. As a result When the crank moves to a certain angle, there is a position called "stagnation zone". At this time, when the pedal is close to the "stagnation zone", part of the rider's foot force does not participate in the transmission of work to the bicycle capstan

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