Rear derailleur with continuous multi-gear switching function

Abstract

The invention relates to a rear derailleur with a continuous multi-gear switching function. The rear derailleur comprises an installing seat, a four-connecting-rod mechanism, a chain guiding part, an electronic power driving mechanism and an elastic component. The four-connecting-rod mechanism is installed on the installing seat, and the installing seat is used as a connecting rod of the four-connecting-rod mechanism; the chain guiding part is connected with an output end of the four-connecting-rod mechanism; the electronic power driving mechanism is installed in the installing seat and used for controlling the action of the four-connecting-rod mechanism to achieve chain shifting; and the elastic component is installed on the four-connecting-rod mechanism and is used for absorbing assembly errors and transmitting power. The rear derailleur with the continuous multi-gear switching function has the beneficial effects of that a cable driving mechanism is changed into the electronic power driving mechanism, so that the structure is simple, the assembly is convenient, and the manufacturing cost and the assembling cost are lowered; and the phenomenon that a rider uses great efforts to switch gears is avoided, so that riding balance is improved, and riding safety is improved.

Description

technical field [0001] The invention relates to a bicycle rear derailleur, in particular to a rear chain device capable of continuous multi-gear conversion. Background technique [0002] Conventional bicycle rear derailleurs generally include a fixed member and a movable member. The movable parts are two connecting rods, which are chain guiding parts, one end of which is connected to the fixed part, and the other end is used to guide the chain to realize speed change. A shift device is arranged on the handlebar of the bicycle, and a cable is arranged between the shift device and the chain guide part to control the movement of the chain guide part. In order to facilitate the movement of the chain guide part relative to the rear sprocket, an elastic element is generally arranged between the two connecting rods, and the elastic element is used to guide the chain guide part to move from the outermost side to the innermost side of the rear sprocket wheel. Achieve variable speed...

AI Technical Summary

Problems solved by technology

[0003] There are some problems that cannot be avoided in the rear derailleurs that use cables: 1. There must be a device that can accommodate the cables, which makes the structure of the control rear derailleurs quite complicated, and the manufacturing cost is high; The two connecting rods are chain guiding parts, which are similar to levers, so that a large force is required when shifting gears, especially at low speeds or when going uphill.

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