Title:
ELECTRIC POWER ASSIST UNIT FOR BICYCLE, AND ELECTRIC POWER ASSISTED BICYCLE
Document Type and Number:
WIPO Patent Application WO/2024/029381
Kind Code:
A1
Abstract:
[Problem] To reduce the size of an electric power assist unit for a bicycle. [Solution] This electric assist unit comprises: a plurality of sun gears which have mutually differing numbers of teeth and to which a pedaling force from a rider is selectively input; a first planetary gear having a tooth surface respectively meshing with the plurality of sun gears; an electric motor that generates a driving force for assisting the pedaling force; a sun gear which differs from the plurality of sun gears, and to which the driving force from the electric motor is input; a second planetary gear that revolves and rotates together with the first planetary gear, and that meshes with the sun gear differing from the plurality of sun gears; a ring gear that is provided so as to be non-rotatable and meshes with the second planetary gear; a carrier that supports the first planetary gear and the second planetary gear; and a case that is connected with the carrier and transmits at least one among the pedaling force and the driving force to a drive wheel.
Inventors:
SUGAYA SHOUJI (JP)
ITO TETSURO (JP)
OKAMOTO TOSHIYUKI (JP)
YAMAGUCHI TOSHIO (JP)
ITO TETSURO (JP)
OKAMOTO TOSHIYUKI (JP)
YAMAGUCHI TOSHIO (JP)
Application Number:
PCT/JP2023/026952
Publication Date:
February 08, 2024
Filing Date:
July 24, 2023
Export Citation:
Assignee:
JATCO LTD (JP)
International Classes:
B62M11/16; B62M6/65
Foreign References:
| EP3131184A1 | 2017-02-15 | |||
| JP2012121407A | 2012-06-28 | |||
| US20170050700A1 | 2017-02-23 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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