US 12,140,209 B2
Multi-speed planetary transmission
Nayan Patel, Avon, IN (US); and Jorge F. Briceno, Brownsburg, IN (US)
Assigned to Allison Transmission, Inc., Indianapolis, IN (US)
Filed by Allison Transmission, Inc., Indianapolis, IN (US)
Filed on Sep. 6, 2023, as Appl. No. 18/243,016.
Application 18/243,016 is a continuation of application No. 17/802,198, granted, now 11,859,698, previously published as PCT/US2021/018507, filed on Feb. 18, 2021.
Claims priority of provisional application 62/981,429, filed on Feb. 25, 2020.
Prior Publication US 2023/0407944 A1, Dec. 21, 2023
Int. Cl. F16H 3/66 (2006.01)
CPC F16H 3/66 (2013.01) [F16H 2200/0065 (2013.01); F16H 2200/0095 (2013.01); F16H 2200/2015 (2013.01); F16H 2200/2051 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A transmission comprising:
at least one stationary member;
an input member rotatable relative to the at least one stationary member;
a plurality of planetary gearsets operatively coupled to the input member, each of the plurality of planetary gearsets including a sun gear, a plurality of planet gears intermeshed with the sun gear and carried by a planet carrier, and a ring gear intermeshed with the plurality of planet gears, the plurality of planetary gearsets including a first planetary gearset, a second planetary gearset, a third planetary gearset, a fourth planetary gearset, and a fifth planetary gearset, the input member is fixedly coupled to only the sun gear of the first planetary gearset of the plurality of planetary gearsets;
an output member operatively coupled to the input member through the plurality of planetary gearsets and rotatable relative to the at least one stationary member, the output member is fixedly coupled to the fifth planetary gearset of the plurality of planetary gearsets;
a plurality of selective couplers, wherein the plurality of selective couplers includes a first number of clutches and a second number of brakes, wherein the second number is five and the first number is two;
a first interconnector fixedly coupling a sun gear of a first one of the plurality of planetary gearsets, a sun gear of a second one of the plurality of gearsets and a first clutch of the plurality of selective couplers together, the first clutch of the plurality of selective couplers, when engaged couples the sun gear of the first one of the plurality of planetary gearsets and the sun gear of the second one of the plurality of gearsets to the input member,
a second interconnector fixedly coupling a planet carrier of the first one of the plurality of planetary gearsets, a ring gear of the second one of the plurality of gearsets and a second clutch of the plurality of selective couplers together, the second clutch of the plurality of selective couplers, when engaged couples the planet carrier of the first one of the plurality of planetary gearsets and the ring gear of the second one of the plurality of gearsets to the input member;
a first brake of the plurality of selective couplers, when engaged, coupling a ring gear of the first planetary gearset to the stationary member;
a second brake of the plurality of selective couplers, when engaged, coupling a ring gear of the second planetary gearset to the stationary member;
a third brake of the plurality of selective couplers, when engaged, coupling a ring gear of the third planetary gearset to the stationary member;
a fourth brake of the plurality of selective couplers, when engaged, coupling a ring gear of the fourth planetary gearset to the stationary member; and
a fifth brake of the plurality of selective couplers, when engaged, coupling a planet carrier of the fifth planetary gearset to the stationary member.