Independent transmission of bicycle

By integrating the gearbox components into the gearbox and installing the derailleur independently on the bicycle frame, the problem of high cost and easy damage of existing bicycle derailleurs is solved, achieving low cost, long life, maintenance-free and convenient gear shifting effect, and supporting electric drive and intelligent control.

CN122211513APending Publication Date: 2026-06-16杨宝才
0 Cites 0 Cited by

Patent Information

Application Number
CN202610676724.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-18
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Existing bicycle derailleurs are limited by the structure and space of transmission components, resulting in high costs, difficult maintenance, easy damage, and inconvenience in use, making it difficult to balance durability and economy.

Method used

Design a gearbox that is independently mounted on a bicycle frame and changes the gear ratio through a closed device, including a gearbox, chainrings, shifting components and shift levers. The shifting components are integrated into the gearbox and use chain drive, belt drive or shaft drive. It is equipped with a shift buffer structure and supports electric drive and intelligent control.

Benefits of technology

It achieves low cost, long life, maintenance-free operation, and easy gear shifting, supports electric drive and intelligent control, and improves the riding experience.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

An independent speed changer of a bicycle comprises a box body, a chain wheel, a speed changing component and a gear shifting handle arranged on a handlebar. The box body is fixed at the joint of a frame vertical pipe and a rear lower fork, and the crankset is mounted on a crank on the left side of the bicycle; a gear shifting wheel is arranged on the upper portion of the left side of the box body and connected with a gear shifting handle through a gear shifting line. An input wheel is arranged at the lower part of the left side of the box body and is connected with a chain wheel through a transmission piece; an output wheel and a supporting arm are arranged on the right side of the box body and are connected with a flywheel of the bicycle through transmission pieces; the speed change component is installed in the box body and comprises a speed change gear, a speed change disc and a gear shifting piece, and the speed change gear and the speed change disc change the transmission ratio through axial meshing; a buffer structure is arranged in the gear shifting piece and used for guaranteeing the convenience and smoothness of gear shifting. The invention has the advantages of simple structure, low manufacturing cost and long service life, is not only suitable for manpower bicycles and tricycles, but also suitable for pedal driving systems of electric vehicles or mopeds, and can also be used for mechanical speed change occasions in other fields.
Need to check novelty before this filing date? Find Prior Art