Bicycle chain-mounting mechanism and chain wheel set using same

Abstract

The invention relates to a bicycle chain-mounting mechanism which is arranged on the wheel surface of a chain wheel, a plurality of wheel teeth are arranged on the periphery of the chain wheel, and each wheel tooth is composed of a tooth peak and a tooth valley. The bicycle chain-mounting mechanism is characterized by comprising at least one chain avoiding groove formed between the first wheel tooth and the second wheel tooth adjacent to the first wheel tooth, wherein the chain avoiding groove extends from the tooth peak of the first wheel tooth to the tooth valley of the second wheel tooth, the chain avoiding groove is provided with a first side wall on the first wheel tooth, and the extending line of the first side wall passes through the middle portion of the top of the tooth peak of the first wheel tooth. Thus, the chain avoiding groove has the appropriate width, and therefore not only can stable chain mounting actions be kept, but also the appropriate thicknesses and strength of the wheel teeth can be guaranteed.

Description

technical field [0001] The present invention relates to the transmission mechanism of a bicycle, and specifically refers to a chain-up structure of a bicycle chain disc, in which chain-avoiding grooves of a predetermined configuration are equidistantly arranged on the teeth of the chain disc wheel surface to ensure the stability of the speed change adjustment, And take into account the overall structural strength. Background technique [0002] The transmission mechanism of a general variable-speed bicycle has at least two sprockets and a chain with different numbers of teeth, wherein the chain surrounds and meshes with one of these sprockets, and when the speed is adjusted, the dial is used to move the chain between the two adjacent chains. between the wheels to obtain different speeds. [0003] Among them, the chain is composed of a wide chain and a narrow chain connected in series, so it is easy to interfere with the sprocket during the speed change operation. In order to...

AI Technical Summary

Problems solved by technology

[0004] The teeth of the sprocket are composed of regular tooth peaks and tooth valleys. The distance between the highest points of two adjacent tooth peaks or the lowest point of two adjacent tooth valleys defines the width of a single tooth. The width of the chain avoidance groove is currently known. It is approximately equal to the tooth width, but such a short distance cannot achieve the effect of completely avoiding the chain. The chain is likely to fail to wind up due to the vibration of the bicycle, and it cannot reduce the noise and wear during gear shifting.

Therefore, there is another conventional gear avoidance groove whose width is designed to be twice the width of the gear teeth. Although such a structural design improves the success rate of winding, the wider the chain avoidance groove, the lower the strength of the gear teeth. , and when the sprocket is reversed, it is easy to cause the problem of chain drop or chain jam, which still has shortcomings and needs to be improved urgently

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