Title:
POWER ASSIST UNIT FOR BICYCLE AND POWER ASSISTED BICYCLE
Document Type and Number:
WIPO Patent Application WO/2023/248851
Kind Code:
A1
Abstract:
[Problem] To suppress an increase in the burden on a rider. [Solution] This power assist unit for a bicycle comprises: a small diameter sun gear; a large diameter sun gear; a first planetary gear that meshes with the small diameter sun gear; a second planetary gear that meshes with the first planetary gear and the large diameter sun gear; a shared carrier connecting and rotatably supporting the first planetary gear and the second planetary gear; a ring gear that meshes with the second planetary gear; a first brake that can lock the rotation of the shared carrier; a second brake that can lock the rotation of the large diameter sun gear; a clutch that can separably join the small diameter sun gear and the shared carrier; an electric motor that assists the driving power in accordance with the pedaling power by the rider; a gear mechanism that transmits, to the ring gear, driving power output from the electric motor; and a case that is fixed to the ring gear and transmits at least one among the pedaling power and the driving power to a drive wheel.
Inventors:
OKAMOTO TOSHIYUKI (JP)
Application Number:
PCT/JP2023/021744
Publication Date:
December 28, 2023
Filing Date:
June 12, 2023
Export Citation:
Assignee:
JATCO LTD (JP)
International Classes:
B62M6/65; B62M11/18; F16H3/44; F16H3/62
Domestic Patent References:
| WO2020245591A1 | 2020-12-10 |
Foreign References:
| JP2014177265A | 2014-09-25 | |||
| JP2017132439A | 2017-08-03 |
Attorney, Agent or Firm:
GOTOH & PARTNERS (JP)
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