Rear chain wheel component for bicycle

Abstract

The invention discloses a rear chain wheel component for a bicycle. The rear chain wheel component comprises three or more odd and even chain wheels and a hub assembled with a rear hub of the bicycle; all chain wheels are separated into pairs of chain wheel groups from large tooth number to small tooth number; through holes on mounting convex pieces of each pair of chain wheel groups are opposite, and each pair of chain wheel group is separated by a distance piece and fixed on one side of a corresponding mounting bracket, so that the material thickness of the mounting bracket is not limited by the distance between the chain wheels; and therefore, the strength can be improved, and the weight is reduced by reducing the thickness of the mounting bracket on the premise of meet the rigidity requirement. In addition, every two chain wheels form a chain wheel group and are arranged on supporting arms of the mounting bracket through the same fastener, and the number of the fasteners can be reduced compared by that required by the patent with the number of ZL-200310121557.2; meanwhile, assembly time can be saved, so that the mounting cost and production cost are reduced.

Description

【Technical field】 [0001] The present invention relates to a sprocket assembly used on a bicycle, more particularly, to a rear sprocket assembly of a bicycle. 【Background technique】 [0002] In modern society, cycling has become more and more popular and popular. Whether it is an amateur rider or a professional rider, the pursuit of speed has become more eager. Therefore, the number of shifting gears in the bicycle transmission is increasing, and the number of sprockets in the sprocket assembly mounted on the rear hub of the bicycle has also increased to ten. Or more. As the number of sprockets increases, the weight of the entire sprocket assembly also increases. In order to reduce the weight without affecting the shifting effect, many products with this type of design have appeared on the market. [0003] The patent No. ZL96119886.9 discloses a bracket type rear sprocket assembly assembly. Each sprocket support bracket has a plurality of radially extending support arms, a...

AI Technical Summary

Problems solved by technology

Since the third sprocket is placed between the first and second sprockets, it is necessary to install the third sprocket on the second sprocket with several fixing pieces during assembly, and then install the first sprocket and the second sprocket. The assembly of the second and third sprockets is installed on the support bracket, which not only requires one more process, but also needs to add some fixing parts. It has been proved by practice that there is room for improvement in terms of installation cost and materials.

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