Bicycle derailleur

Abstract

The invention discloses a bicycle derailleur. The bicycle derailleur comprises a body, a chain guide piece arranged on the body in a swinging manner, a resistance mechanism and a first stop piece, wherein the resistance mechanism includes a resistance assembly and an adjusting piece, the adjusting piece is arranged on the body in a pivoted mode and can rotate between a first position and a secondposition, and the two ends of the resistance assembly are arranged on the chain guide piece and the adjusting piece respectively; the resistance assembly applies a resistance moment to the guide chainpiece and enables the adjusting piece to have a trend of rotating towards the first position, and the resistance moment is gradually increased when the adjusting piece moves from the first position to the second position; the first stop piece is arranged on the body and can move to a release position and a stop position; when the first stop piece is located at a stop position, the first stop piece interferes with a rotating path, between the first position and the second position, of the adjusting piece; and when the first stop piece is located at the release position, the first stop piece does not interfere with the rotating path, between the first position and the second position, of the adjusting piece .

Description

technical field [0001] The invention relates to a bicycle derailleur. Background technique [0002] The transmission system is one of the core mechanisms of a bicycle, and the derailleur used to change speed is even more important. The derailleur pulls the chain from one sprocket to another sprocket through the relative swing of the chain guide, so as to achieve the purpose of speed change. At the same time, viewed from the side where the derailleur is installed on the hub, the chain guide will normally be subjected to a clockwise force to stretch the chain, so that the chain can be maintained at an appropriate tension to avoid unsmooth operation or chain drop Situation happens. [0003] However, in this type of conventional derailleur, the resistance mechanism for providing the clockwise acting force to guide the chain element usually maintains a constant value and cannot be adjusted. Therefore, once riding on a rough road section with large gradient changes, the force g...

AI Technical Summary

Problems solved by technology

[0003] However, in such existing derailleurs, the resistance mechanism used to provide clockwise force to guide the chain member usually maintains a constant value and cannot be adjusted.

Therefore, once riding on a rough road section with large gradient changes, the force generated by the shock of the chain will be greater than the resistance torque provided by the resistance mechanism, which will cause the chain guide to swing in the opposite direction and cause the chain to relax. , Insufficient tension, chain drop occurs, seriously endangering the safety of riders, there are shortcomings that need to be improved urgently

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