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Title:
MOTOR UNIT AND ELECTRIC BICYCLE
Document Type and Number:
WIPO Patent Application WO/2019/176649
Kind Code:
A1
Abstract:
Provided is a motor unit and an electric bicycle that enable curbing of size increase of the motor unit. A rotary shaft (51) includes a protrusion portion (511) that protrudes, from a rotor (52), along the axial direction (D) of the rotary shaft (51). In the outer circumferential surface of the protrusion portion (511), a teeth part (54) is formed that is engaged with a gear (311). A first portion (5211) of the rotor (52) is located around the rotary shaft (51), and is fixed to the rotary shaft (51). A second portion (5212) of the rotor (52) is located at an end portion, of the rotor (52), that is on the protrusion portion (511) side. The inner diameter (d2) of the second portion (5212) is larger than the inner diameter (d1) of the first portion (5211).

Inventors:
NISHIMORI, Masato
UMEGAKI, Fuhito
YAMAGUCHI, Takehiro
Application Number:
JP2019/008625
Publication Date:
September 19, 2019
Filing Date:
March 05, 2019
Export Citation:
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Assignee:
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. (1-61, Shiromi 2-chome Chuo-ku, Osaka-sh, Osaka 07, 〒5406207, JP)
International Classes:
H02K1/22; B62J99/00; B62M6/50; B62M6/55; H02K1/27; H02K5/16; H02K7/116; H02K7/18; H02K11/21; H02K21/14
Domestic Patent References:
WO2018039343A12018-03-01
Foreign References:
JP2011207361A2011-10-20
JP2003319631A2003-11-07
JP2016093009A2016-05-23
JP2005168264A2005-06-23
JP2016203735A2016-12-08
JP2007274872A2007-10-18
JPH08223889A1996-08-30
JPS63117273U1988-07-28
Attorney, Agent or Firm:
HOKUTO PATENT ATTORNEYS OFFICE (Umeda Square Bldg, 12-17 Umeda 1-chome, Kita-ku, Osaka-sh, Osaka 01, 〒5300001, JP)
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