Damped planetary transmission
View Patent ↗A damped planetary transmission comprising an input member, an inertial member connected to the input member, a planetary gear assembly connected to the input member, the planetary gear assembly comprising a carrier member that is directly and fixedly connected to the input member, a brake member engaged with a ring gear of the planetary gear assembly, the planetary gear assembly connected to an output member, a one-way clutch operationally disposed between the input member and the output member, and a vibration isolator directly connected for torque flow between the input member and the one-way clutch.
1. A damped planetary transmission comprising:
an input member;
an inertial member connected to the input member;
a planetary gear assembly connected to the input member, the planetary gear assembly comprising a carrier member that is directly and fixedly connected to the input member;
a brake member engaged with a ring gear of the planetary gear assembly;
the planetary gear assembly connected to an output member;
a one-way clutch operationally disposed between the input member and the output member; and
a vibration isolator directly connected for torque flow between the input member and the one-way clutch.
2. The damped planetary transmission as in claim 1 , wherein the vibration isolator is operable to transmit a torque from the input member to the output member when the one-way clutch is engaged.
3. The damped planetary transmission as in claim 1 , wherein the planetary gear assembly comprises a sun gear fixedly connected to the output member.
4. The damped planetary transmission as in claim 1 , wherein the brake member comprises:
a vacuum actuator having a linkage connected to a band end;
a guide member engaged with the linkage whereby a movement of the band end is substantially linear; and
the brake member is controlled by a controller using an engine speed.
5. The damped planetary transmission as in claim 1 , wherein the vibration isolator comprises a torsion spring.
6. The damped planetary transmission as in claim 1 , wherein the vibration isolator comprises an elastomeric member.
7. The damped planetary transmission as in claim 1 , wherein the output member comprises a pulley.
8. The damped planetary transmission as in claim 1 , wherein the input member is connected to an engine crankshaft.
9. The damped planetary transmission as in claim 1 , wherein the inertial member comprises an elastic portion.