公开(公告)号：US20150285358A1

公开(公告)日：2015-10-08

申请号：US14243213

申请日：2014-04-02

Applicant: Shimano Inc.

Inventor： Shingo NUMATA ,  Tsuyoshi FUKUMORI

IPC: F16H55/08 ,  B62M9/10

CPC classification number: F16H55/0873 ,  B62M9/10 ,  F16H55/08

Abstract: A bicycle rear sprocket is basically provided with a sprocket body and a chain engagement structure. The sprocket body has a center rotational axis, a first side surface and a second side surface. The first and second side surfaces face oppositely with respect to an axial direction of the bicycle rear sprocket. The first side surface is a smaller sprocket facing side of the sprocket body. The chain engagement structure includes a plurality of sprocket teeth extending radially outward from an outer periphery of the sprocket body. The sprocket teeth include a first shift tooth and a second shift tooth. The second shift tooth is positioned at a third tooth position in a downstream direction of a rotational driving direction of the bicycle rear sprocket with respect to the first shift tooth. The first shift tooth and the second shift tooth function as a shift tooth when a bicycle chain moves from a smaller bicycle rear sprocket to the bicycle rear sprocket.

Abstract translation: 自行车后链轮基本上设置有链轮主体和链接结构。 链轮体具有中心旋转轴线，第一侧面和第二侧面。 第一和第二侧表面相对于自行车后链轮的轴向相反地面对。 第一侧面是链轮主体的面向较小的链轮侧的较小的链轮。 链条接合结构包括从链轮主体的外周径向向外延伸的多个链轮齿。 链轮齿包括第一变速齿和第二变速齿。 第二变速齿相对于第一变速齿位于自行车后链轮的旋转驱动方向的下游方向的第三齿位置。 当自行车链条从较小的自行车后链轮移动到自行车后链轮时，第一换档齿和第二换档齿功能作为换档齿。