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公开(公告)号：US5876159A
公开(公告)日：1999-03-02
申请号：US839018
申请日：1997-04-23
CPC分类号： B23F19/10 , B62M9/10 , Y10T409/101113 , Y10T409/10795 , Y10T409/303752
摘要： A sprocket trimming method for a multi-stage sprocket assembly is disclosed which includes the steps of: (1) aligning the two sprockets at a gear shift position where a chain is escaping from one sprocket and engaging with another sprocket and is being tilted at a tilting angle; (2) using a computer aided design simulation to simulate how the gear shift operation is taking place and thus identify the portion of the sprocket tooth that will be overlapped and/or interfered with the chain when the chain is moved from an escaping sprocket tooth to an engaging sprocket tooth; and (3) trimming the overlapping and interference portion of the sprocket teeth to a depth according to the following equation: ##EQU1## wherein: D is the depth of the overlapping and interference portion of the sprocket teeth to be trimmed, w is the pitch width of the chain, Lc is the pitch length of the chain, .theta. is the tilting angle of the chain at gear shift position, Ts is the thickness of the sprocket of a smaller diameter, Sg is the distance between the two sprockets. The trimming allows the gear shift operation to be performed without the chain interfering with the sprocket teeth located between the escaping and engaging teeth.
摘要翻译： 公开了一种用于多级链轮组件的链轮修剪方法，其包括以下步骤：（1）在链条从一个链轮脱出并与另一个链轮接合并在一个链轮处倾斜的变速位置对准两个链轮 倾斜角度 （2）使用计算机辅助设计模拟来模拟如何进行换档操作，从而识别当链从脱出的链轮齿移动时与链条重叠和/或干扰的链轮齿的部分 啮合链轮齿; 和（3）根据以下等式将链轮齿的重叠和干涉部分修剪到深度：其中：D是要修剪的链轮齿的重叠和干涉部分的深度，w是节距 链的宽度，Lc是链的节距长度，θ是链在变速位置的倾斜角，Ts是较小直径的链轮的厚度，Sg是两个链轮之间的距离。 修整允许执行换档操作，而不会使链与位于逸出齿和啮合齿之间的链轮齿相干扰。
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2.发明授权Two sprocket tooth trimming methods and the structure thereof for the multi-stage sprocket assembly in a bicycle 失效两个链轮齿修剪方法及其在自行车中用于多级链轮组件的结构
公开(公告)号：US5409422A
公开(公告)日：1995-04-25
申请号：US219520
申请日：1994-03-28
CPC分类号： B62M9/10
摘要： A multiple sprocket assembly for use in a bicycle comprising: (1) at least a large sprocket wheel and a small sprocket wheel, each of the large and small sprocket wheels having a plurality of teeth on an outer edge thereof, and the large sprocket wheel having more teeth than the small sprocket wheel; (2) each of the sprocket wheels being adapted to engage with a chain guided by a derailleur; the chain comprising a plurality of rollers connected in series by link plates. The multiple sprocket assembly is characterized in that the small sprocket wheel has at least two consecutive teeth, each with a portion of its side surface trimmed off, and the large sprocket wheel has at least three consecutive teeth each also with a portion of its side surface trimmed off, so as to avoid interference between the link plates and the large sprocket when the chain is being shifted from the small sprocket to the large sprocket. In a preferred embodiment, at least two of the trimmed portions on the small sprocket are formed on the first distal side surface, and the trimmed portions on the large sprocket contain at least two trimmed portions on the second distal side surface and at least one trimmed portion on the second proximal side surface. The side surfaces of the teeth of the small sprocket are trimmed in such a manner such that the escape roller will not be immediately lifted up, but will be pushed laterally as a result of the trimmed portions of the small sprocket. The side surfaces of the teeth of the large sprocket are trimmed in such a manner such that one of the surfaces contains an axially extending portion, which serves as a fulcrum for the engage roller to be pivotally engaged with the large sprocket.
摘要翻译： 一种用于自行车的多链轮组件，包括：（1）至少大的链轮和小链轮，每个大链轮和小链轮在其外边缘上具有多个齿，大链轮 具有比小链轮更多的齿; （2）每个链轮适于与由拨链器引导的链接合; 链条包括通过链板串联连接的多个辊。 多链轮组件的特征在于，小链轮具有至少两个连续的齿，每个齿的侧面的一部分被修剪，并且大链轮具有至少三个连续的齿，每个齿也具有其侧表面的一部分 修剪掉，以便当链条从小链轮移动到大链轮时，避免链板与大链轮之间的干涉。 在优选实施例中，小链轮上的至少两个修剪部分形成在第一远端侧表面上，并且大链轮上的修剪部分在第二远侧侧表面上包含至少两个修剪部分，并且至少一个修剪 部分在第二近侧表面上。 小链轮的齿的侧面以这样的方式修剪，使得逃逸辊不会立即被提起，而是由于小链轮的修剪部分而被横向推动。 大链轮的齿的侧面以这样的方式修整，使得其中一个表面包含轴向延伸部分，其作为用于接合辊与大链轮枢转接合的支点。
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