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Title:
POWER-ASSISTED BICYCLE INCLUDING REGENERATIVE MECHANISM
Document Type and Number:
WIPO Patent Application WO/2010/126039
Kind Code:
A1
Abstract:
Provided is a power-assisted bicycle of the central motor type including a hub gear and capable of regenerative charging without complicating the system. A hub (1) on a driving wheel includes a gear change mechanism (5) including a planetary gear mechanism, a one-way clutch (2) for reverse input, and a clutch switching unit (9). The gear change mechanism (5) has at least one sun gear (5a), and transmits driving force to the driving wheel via a sprocket (7). The gear change mechanism also includes a gear change control mechanism (10) that changes gears by switching the sun gear (5a) between being rotatable about an axle (11) and non-rotatable in response to the driving force. The one-way clutch (2) for reverse input is disposed between the at least one sun gear (5a) and the axle (11), and the clutch switching unit (9) switches the sun gear (5a) between being rotatable about the axle (11) and non-rotatable in response to a reverse input. The clutch switching unit (9) sets the one-way clutch (2) for reverse input to be rotatable while the bicycle is being driven so that the driving force is transmitted and to be non-rotatable while the bicycle is moving forward but not being driven so that the reverse input torque is transmitted to the sprocket (7).

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Inventors:
MAENO EIJI (JP)
ITO KIYOHIRO (JP)
Application Number:
PCT/JP2010/057453
Publication Date:
November 04, 2010
Filing Date:
April 27, 2010
Export Citation:
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Assignee:
NTN TOYO BEARING CO LTD (JP)
MAENO EIJI (JP)
ITO KIYOHIRO (JP)
International Classes:
B62M6/55; B62M11/16; F16D41/24
Foreign References:
JP2004268843A2004-09-30
JP2001213383A2001-08-07
JP2004270877A2004-09-30
JP2002005200A2002-01-09
JPH08140212A1996-05-31
JP2003166563A2003-06-13
JPH10250673A1998-09-22
JP2001213383A2001-08-07
JP2004268843A2004-09-30
Other References:
See also references of EP 2426041A4
Attorney, Agent or Firm:
KAMADA Bunji et al. (JP)
Bunji Kamata (JP)
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