US 12,296,919 B2
Bottom bracket gear mechanism of planetary design for a bicycle or a pedelec
Stefan Beck, Eriskirch (DE); Michael Wechs, Weißensberg (DE); Fabian Kutter, Kressbronn (DE); Thomas Martin, Weissensberg (DE); Mladjan Radic, Lonsee (DE); Thomas Riedisser, Sigmarszell (DE); and Hagen Doepfert, Lindau (DE)
Assigned to Friedrichshafen AG, Friedrichshafen (DE)
Filed by ZF Friedrichshafen AG, Friedrichshafen (DE)
Filed on May 16, 2024, as Appl. No. 18/665,767.
Claims priority of application No. 102023204592.3 (DE), filed on May 17, 2023.
Prior Publication US 2024/0383572 A1, Nov. 21, 2024
Int. Cl. B62M 11/18 (2006.01)
CPC B62M 11/18 (2013.01) 20 Claims
OG exemplary drawing
 
1. A bottom bracket gear mechanism for a bicycle or a pedelec (1), comprising:
a gear mechanism input shaft (WAn) as a drive;
a gear mechanism output shaft (WAb) as an output;
a multi-step main gear mechanism (3);
a gear mechanism shifting group (4), comprising:
a first planetary gear set (RS1), a second element of the first planetary gear set (RS1) being connected to a first shaft (W1);
a second planetary gear set (RS2), a first element of the first planetary gear set (RS1) being connected via a fourth shaft (W4) to a first element of the second planetary gear set (RS2), a third element of the first planetary gear set (RS1) being connected via a second shaft (W2) to a second element of the second planetary gear set (RS2);
a first shifting element (B1), the first shifting element (B1) being a brake, the third element of the first planetary gear set (RS1) being fixable via the second shaft (W2) and the first shifting element (B1);
a second shifting element (B2), the second shifting element (B2) being another brake, a third element of the second planetary gear set (RS2) being fixable via a third shaft (W3) and the second shifting element (B2); and
a fifth shifting element (K1I, K1II, K1III, K1IV, K1V, K1VI), the fifth shifting element (K1I, K1II, K1III, K1IV, K1V, KIV) being a clutch or a freewheel, two shafts of the first, second, third, and fourth shafts (W1, W2, W3, W4) being connectable by blocking of the first planetary gear set (RS1) and the second planetary gear set (RS2) by the fifth shifting element (K1I, K1II, K1III, K1IV, K1V, KIV).