Back derailleur of bicycle

Abstract

The invention discloses a back derailleur of a bicycle. The back derailleur aims to be small in friction, long in service life and good in the adjustment effect, and comprises a base component (1), an adjustment mechanism (2) connected with the base component (1), and a chain guide (3) connected with the adjustment mechanism (2). A control adjustment rod (4) is fixedly arranged on the adjustment mechanism (2). A swinging hole (5) adaptive to the swinging direction of a control line is arranged on the base component (1), and/or a yield portion adaptive to the swinging direction of the control line is arranged on the control adjustment rod (4). During use, the back derailleur is fixedly installed on the bicycle through the base component (1), the control line penetrates out from the swinging hole (5) and or the yield portion to be connected with the control adjustment rod (4). The back derailleur is applicable to the technical field of the back derailleur of the bicycle.

Description

technical field [0001] The invention relates to a bicycle derailleur, in particular to a bicycle rear derailleur. Background technique [0002] Cycling is increasingly becoming a popular form of recreation and transportation. Moreover, cycling has become a very popular competitive sport for both amateurs and professionals. Whether the bicycle is used for leisure, transportation or competition, the bicycle industry is constantly improving various components of the bicycle to provide users with a better experience. [0003] There are two common types of derailleurs on the market, one is the Chinese patent publication No. 1095998, which is the traditional speed changer of Shimano Co., Ltd., such as Figures 1 to 3 As shown, when the guide wheel moves from the outermost high-speed gear of the multi-stage speed change flywheel to the innermost low-speed gear under the pull of the control line 1a, the control line 1a passes through the hoop set on the base member 2a 3a will form...

AI Technical Summary

Problems solved by technology

It will also affect the service life of the control line 1b, and due to friction, it will also cause the control line 1b to lag, affecting the synchronization of the speed change

[0005] Meanwhile, for some conventional rear derailleurs such as Figures 1 to 3 As shown, under the action of the control line 1a, the chain guide converts the chain between the multi-stage flywheels to achieve gear shifting, and the chain guide moves laterally along the oblique trajectory formed by the outer circumference of the multi-stage flywheel , so that the end of the control line 1a will also swing sideways during the shifting process. When the end of the control line 1a swings relatively large, the control line 1a will be in contact with the base member 2a and The friction of the adjustment rod will not only shorten the service life of the control line 1a, but also cause damage to the base member 2a and the adjustment rod

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