公开(公告)号：US11104401B2

公开(公告)日：2021-08-31

申请号：US16413130

申请日：2019-05-15

Applicant: Shimano Inc.

Inventor： Shinichiro Noda ,  Tomoyuki Iiboshi ,  Takaaki Fujiwara ,  Akihiro Izawa

IPC: F16H37/06 ,  B62M6/55 ,  B62M6/50 ,  B62M6/80 ,  B62M11/02 ,  F16H1/20 ,  B62J99/00 ,  B62J45/00 ,  B62J45/40

Abstract: A human-powered vehicle drive unit that reduces loss of human driving force includes an electric motor, a crankshaft, an output portion, a speed reducer, and a clutch. The electric motor is configured to assist in propulsion of a human-powered vehicle. The output portion is coupled to the crankshaft. The speed reducer reduces a rotational speed of the electric motor in multiple steps. The clutch is provided between the output portion and the speed reducer. In a case in which the crankshaft rotates in a first rotational direction, the output portion is configured to rotate in the first rotational direction. In a case in which the crankshaft rotates in a second rotational direction, the output portion is configured to rotate in the second rotational direction. The clutch is configured to transmit a rotational force of the electric motor to the output portion from the speed reducer.