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发明公开
CN103538688A 用于自行车变速系统的后变速器及其导链轮 有权

用于自行车变速系统的后变速器及其导链轮
摘要：
本发明涉及用于自行车变速系统的后变速器(24)及其导链轮(28,30)。所述导链轮包括环形的链轮体(50)，所述链轮体包括：用于可绕导链轮的转动轴线(Z)转动支承的中心开口(52)；具有沿径向突出的且设置在链轮体(50)的外周面上的多个齿(56)的齿结构(54)，其中在沿周向相邻的两个齿(56)之间设有一个齿槽(60)，其中各个齿(56)在该齿结构(54)的齿根圆(62)区域内具有匹配于该链条(12)的预定的齿宽(a)。为了改善导引性能而规定，导链轮在齿槽(60)中的至少一些处在齿隙齿槽底面(64)附近的区域内和/或在齿(56)中的至少一些上具有至少一个导引部(66;70,72;80)，该导引部的宽度(a+x)比相邻的齿(56)中的至少一个的齿宽(a)大。
摘要（英）：

The invention relates to a rear transmission device(24) and a chain cable fairlead(28,30) used for a bicycle transmission system. The chain cable fairlead comprises an annular chain wheel (50). The chain wheel comprises a central opening (52) used for supporting and rotating around a rotating axis (Z) of the chain wheel; a gear structure (54) having a plurality of gears (56) on an outer periphery of the chain wheel body (50); a gear slot (60) disposed between each two gears (56) along a circumferential direction. A predetermined gear width (a)cooperated with the chain (12) is disposed in a dedendum circle (62) area of the gear structure (54). In order to improve the guiding performance, the chain cable fairlead is provided with at least a guiding part (66;70,72,80) in the area close to the gear gap gear slot bottom surface (64) of the gear slot (60) and/or on the gear (56), and therefore the width (a+x) of the guiding part is larger than the at least one gear width (a) of the adjacent gear (56).

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