Bicycle planetary gear transmission arrangement
View Patent ↗A bicycle comprising a frame and at least one wheel attached to the frame, the frame further comprising a receiver, a first planetary gear transmission disposed in the receiver, the wheel having a hub, a second planetary gear transmission disposed in the hub, and an endless member for transmitting a torque trained between the first planetary gear transmission and the second planetary gear transmission.
1. A bicycle comprising:
a frame and at least one wheel attached to the frame;
the frame further comprising a receiver;
a first planetary gear transmission disposed in the receiver, the first planetary gear transmission comprising;
an input member ( 100 ) connected to a ring gear ( 400 );
the ring gear ( 400 ) comprising a ring gear (R 1 ) and a ring gear (R 2 ), ring gear ( 400 ) in meshing engagement to a pinion gear (P 1 );
pinion gear (P 1 ) and a pinion gear (P 2 ) journalled to a first carrier shaft ( 201 ), a first carrier ( 200 ) engaged with a first brake (brake 1 ), a one-way clutch (CL 1 ) disposed between the first carrier ( 200 ) and the ring gear ( 400 );
a pinion gear (P 2 ) in meshing engagement with a ring gear (R 3 );
a ring gear (R 3 ) connected to a second carrier ( 300 );
a third pinion (P 3 ) and a fourth pinion (P 4 ) journalled to the second carrier ( 300 );
the third pinion (P 3 ) in meshing engagement with a ring gear (R 4 ), ring gear (R 4 ) engaged with a second brake (brake 2 ), a second one-way clutch (CL 2 ) disposed between the ring gear (R 4 ) and the ring gear (R 3 );
the fourth pinion (P 4 ) in meshing engagement with an output sprocket (S 3 );
the wheel having a hub;
a second planetary gear transmission disposed in the hub; and
a belt for transmitting a torque trained between the first planetary gear transmission output sprocket and the second planetary gear transmission.
2. The bicycle as in claim 1 , wherein the first planetary gear transmission comprises four speeds.
3. The bicycle as in claim 1 , wherein the second planetary gear transmission comprises three speeds.
4. The bicycle as in claim 1 , wherein the endless member comprises a chain.
5. The bicycle as in claim 1 , wherein the receiver is disposed in a frame bottom bracket.
6. A belt drive system for a bicycle comprising:
a frame comprising a receiver;
a first planetary gear transmission disposable in the receiver, the first planetary gear transmission comprising;
an input member ( 100 ) connected to a ring gear ( 400 );
the ring gear ( 400 ) comprising a ring gear (R 1 ) and a ring gear (R 2 ), ring gear ( 400 ) in meshing engagement to a pinion gear (P 1 );
pinion gear (P 1 ) and a pinion gear (P 2 ) journalled to a first carrier shaft ( 201 ), a first carrier ( 200 ) engaged with a first brake (brake 1 ), a one-way clutch (CL 1 ) disposed between the first carrier ( 200 ) and the ring gear ( 400 );
a pinion gear (P 2 ) in meshing engagement with a ring gear (R 3 );
a ring gear (R 3 ) connected to a second carrier shaft ( 301 );
a third pinion (P 3 ) and a fourth pinion (P 4 ) journalled to a second carrier ( 300 );
the third pinion (P 3 ) in meshing engagement with a ring gear (R 4 ), ring gear (R 4 ) engaged with a second brake (brake 2 ), a second one-way clutch (CL 2 ) disposed between the ring gear (R 4 ) and the ring gear (R 3 );
the fourth pinion (P 4 ) in meshing engagement with an output sprocket (S 3 );
a wheel engagable with the frame, the wheel having a hub;
a second planetary gear transmission disposed in the hub; and
an endless member for transmitting a torque trainable between the first planetary gear transmission output sprocket and the second planetary gear transmission.
7. The system as in claim 6 , wherein the first planetary gear transmission comprises four speeds.
8. The system as in claim 6 , wherein the second planetary gear transmission comprises three speeds.
9. A belt drive system comprising:
a first planetary gear transmission mountable in a first receiver comprising;
an input member ( 100 ) connected to a ring gear ( 400 );
the ring gear ( 400 ) comprising a ring gear (R 1 ) and a ring gear (R 2 ), ring gear (R 2 ) in meshing engagement to a pinion gear (P 1 );
pinion gear (P 1 ) and a pinion gear (P 2 ) journalled to a first carrier shaft ( 201 ), a first carrier ( 200 ) engaged with a first brake (brake 1 ), a one-way clutch (CL 1 ) disposed between the first carrier ( 200 ) and the ring gear ( 400 );
a pinion gear (P 2 ) in meshing engagement with a ring gear (R 3 );
a ring gear (R 3 ) connected to a second carrier ( 300 );
a third pinion (P 3 ) and a fourth pinion (P 4 ) journalled to the second carrier ( 300 );
the third pinion (P 3 ) in meshing engagement with a ring gear (R 4 ), ring gear (R 4 ) engaged with a second brake (brake 2 ), a second one-way clutch (CL 2 ) disposed between the ring gear (R 4 ) and the ring gear (R 3 );
the fourth pinion (P 4 ) in meshing engagement with an output sprocket (S 3 );
a second planetary gear transmission mountable in a second receiver; and
an endless belt member for transmitting a torque trainable between the first planetary gear transmission output sprocket and the second planetary gear transmission.
10. The system as in claim 9 , wherein the first planetary gear transmission comprises four speeds.
11. The system as in claim 10 , wherein the second planetary gear transmission comprises three speeds.