Title:
自転車用変速機およびこれを備える自転車用アシストシステム
Document Type and Number:
Japanese Patent JP6820244
Kind Code:
B2
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.
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Inventors:
Takashi Yamamoto
Hiroyuki Urabe
Ikeda
Hiroyuki Urabe
Ikeda
Application Number:
JP2017218448A
Publication Date:
January 27, 2021
Filing Date:
November 13, 2017
Export Citation:
Assignee:
SHIMANO INC.
International Classes:
F16H3/44; B62M6/55; B62M11/18; F16H3/66
Domestic Patent References:
| JP10096453A | ||||
| JP2007298166A | ||||
| JP2016537587A | ||||
| JP2015189468A |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda