公开(公告)号：US20180237105A1

公开(公告)日：2018-08-23

申请号：US15897491

申请日：2018-02-15

Applicant: Shimano Inc.

Inventor： Takashi YAMAMOTO ,  Hiroyuki URABE ,  Kai IKEDA

IPC: B62M11/16 ,  F16H3/66 ,  B62M6/55 ,  B62M11/18

CPC classification number: B62M11/16 ,  B62M6/55 ,  B62M11/18 ,  F16H3/62 ,  F16H3/66 ,  F16H2063/3093 ,  F16H2200/0039 ,  F16H2200/0043 ,  F16H2200/0047 ,  F16H2200/2007 ,  F16H2200/2012 ,  F16H2200/2035 ,  F16H2200/2041 ,  F16H2200/2069 ,  F16H2200/2084

Abstract: A bicycle shifting device includes a first shifting mechanism, a transmission mechanism, and a setting mechanism. The setting mechanism sets paths in the transmission mechanism to transmit rotation from an input body to an output body at transmission ratios of at least three steps. The transmission mechanism establishes a first path transmitting the rotation at one of first and second transmission ratios by changing a rotational speed with the first shifting mechanism, and a second path transmitting the rotation at a greater transmission ratio than the first and second transmission ratios by changing the rotational speed with a different shifting mechanism from the first shifting mechanism. The first path includes first and second planetary mechanisms. The setting mechanism sets the transmission mechanism so that the rotational speed is not changed by the first planetary mechanism in the second path.