US 12,403,982 B2
Centrally-mounted drive mechanism used for power-assisted bicycle, and power-assisted bicycle
Fuming Huang, Suzhou (CN); Junning Huang, Suzhou (CN); Cheng Ma, Suzhou (CN); Hualin Cai, Suzhou (CN); and Junhui Yu, Suzhou (CN)
Assigned to SUZHOU WANJIA ELECTRIC CO., LTD., Jiangsu (CN)
Appl. No. 17/776,526
Filed by SUZHOU WANJIA ELECTRIC CO., LTD., Jiangsu (CN)
PCT Filed Nov. 3, 2020, PCT No. PCT/CN2020/126022
§ 371(c)(1), (2) Date May 12, 2022,
PCT Pub. No. WO2021/098500, PCT Pub. Date May 27, 2021.
Claims priority of application No. 201911134539.5 (CN), filed on Nov. 19, 2019; and application No. 202010304310.8 (CN), filed on Apr. 17, 2020.
Prior Publication US 2022/0379996 A1, Dec. 1, 2022
Int. Cl. B62M 6/55 (2010.01); B62J 43/13 (2020.01); B62J 43/20 (2020.01); B62M 6/90 (2010.01); B62M 11/02 (2006.01)
CPC B62M 6/55 (2013.01) [B62J 43/13 (2020.02); B62J 43/20 (2020.02); B62M 6/90 (2013.01); B62M 11/02 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A centrally mounted driving mechanism applicable to a power-assisted bicycle, comprising:
a housing;
a motor configured for providing a driving force;
a planetary gear mechanism in transmission connection with a motor output shaft;
a bevel gear driving end;
a bevel gear driven end engaged with the bevel gear driving end, wherein the bevel gear driven end is connected with a crankset, and the planetary gear mechanism comprises a planetary gear and a planetary gear output bracket; and wherein
the centrally mounted driving mechanism further comprises a bevel gear support sleeved outside the planetary gear output bracket, a clutch is provided between the planetary gear output bracket and the bevel gear support, and the planetary gear output bracket is in transmission connection with the bevel gear support through the clutch; and
the bevel gear driving end is coaxially and fixedly connected with the bevel gear support, and a support assembly is provided outside the bevel gear support, and the support assembly is configured to support the planetary gear output bracket and the bevel gear driving end;
the planetary gear output bracket has a shaft portion, the bevel gear support has a second annular protrusion, and the second annular protrusion is configured to surround the shaft portion;
the clutch is arranged between the second annular protrusion and the planetary gear output bracket, and the clutch is fitted with and connected to the bevel gear support and the planetary gear output bracket, to realize connection and separation of the bevel support and the planetary gear output bracket; and
the support assembly is arranged outside the second annular protrusion;
the bevel gear support is provided with a first annular protrusion located at an inner side of the second annular protrusion, the bevel gear driving end is connected to an inner wall of the first annular protrusion; and
a groove is provided at an end of the shaft portion away from the planetary gear, the first annular protrusion is inserted into the groove, and a gap is provided between the first annular protrusion and an inner wall of the groove.