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US 12,000,464 B1Granted
Multi-speed planetary transmission
AssigneeAllison Transmission, Inc.
InventorsIsaac Mock, Michael Rietdorf
Life of this patent
Estimating the term…
Abstract
A multi-speed transmission may include a plurality of planetary gearsets and a plurality of selective couplers. The plurality of planetary gearsets may include a first planetary gearset, a second planetary gearset, a third planetary gearset, a fourth planetary gearset, and a fifth planetary gearset. The plurality of selective couplers may include a number of clutches and a number of brakes. The multi-speed transmission may have five planetary gearsets and seven selective couplers. The seven selective couplers may include two clutches and five brakes or three clutches and three brakes.
Claims13
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 first gearset component, a second gearset component, and a third gearset component, 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 the first gearset component of the first planetary gearset;
- 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 second gearset component of the third planetary gearset, the first gearset component of the fourth planetary gearset, and the first gearset component of the fifth planetary gearset;
- a first interconnector which fixedly couples the second gearset component of the second planetary gearset, the third gearset component of the third planetary gearset, and the third gearset component of the fourth planetary gearset together;
- a second interconnector which fixedly couples the third gearset component of the second planetary gearset and the second gearset component of the first planetary gearset together;
- a third interconnector which fixedly couples the second gearset component of the fourth planetary gearset and the third gearset component of the fifth planetary gearset together;
- a fourth interconnector which fixedly couples the first gearset component of the second planetary gearset and the first gearset component of the third planetary gearset together;
- and
- a plurality of selective couplers, wherein the plurality of selective couplers includes:
- a first selective coupler which, when engaged, fixedly couples the input member and the first gearset component of the first planetary gearset to the first gearset component of the second planetary gearset and the first gearset component of the third planetary gearset;
- a second selective coupler which, when engaged, fixedly couples the input member and the first gearset component of the first planetary gearset to the second gearset component of the second planetary gearset, the third gearset component of the third planetary gearset, and the third gearset component of the fourth planetary gearset;
- a third selective coupler which, when engaged, fixedly couples the third gearset component of the first planetary gearset to the at least one stationary member;
- a fourth selective coupler which, when engaged, fixedly couples the second gearset component of the first planetary gearset and the third gearset component of the second planetary gearset to the at least one stationary member;
- a fifth selective coupler which, when engaged, fixedly couples the second gearset component of the second planetary gearset, the third gearset component of the third planetary gearset, and the third gearset component of the fourth planetary gearset to the at least one stationary member;
- a sixth selective coupler which, when engaged, fixedly couples the second gearset component of the fourth planetary gearset and the third gearset component of the fifth planetary gearset to the at least one stationary member;
- and
- a seventh selective coupler which, when engaged, fixedly couples the second gearset component of the fifth planetary gearset to the at least one stationary member.
15 more elements
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 first gearset component, a second gearset component, and a third gearset component, 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 the first gearset component of the first planetary gearset;
- 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 second gearset component of the third planetary gearset, the first gearset component of the fourth planetary gearset, and the third gearset component of the fifth planetary gearset;
- a first interconnector which fixedly couples the third gearset component of the second planetary gearset and the second gearset component of the first planetary gearset together;
- a second interconnector which fixedly couples the second gearset component of the second planetary gearset, the third gearset component of the third planetary gearset, the second gearset component of the fourth planetary gearset, and the first gearset component of the fifth planetary gearset together;
- a third interconnector which fixedly couples the first gearset component of the second planetary gearset and the first gearset component of the third planetary gearset together;
- and
- a plurality of selective couplers, wherein the plurality of selective couplers includes:
- a first selective coupler which, when engaged, fixedly couples the input member and the first gearset component of the first planetary gearset to the first gearset component of the second planetary gearset and the first gearset component of the third planetary gearset;
- a second selective coupler which, when engaged, fixedly couples the input member and the first gearset component of the first planetary gearset to the second gearset component of the second planetary gearset, the third gearset component of the third planetary gearset, the second gearset component of the fourth planetary gearset, and the first gearset component of the fifth planetary gearset;
- a third selective coupler which, when engaged, fixedly couples the third gearset component of the first planetary gearset to the at least one stationary member;
- a fourth selective coupler which, when engaged, fixedly couples the second gearset component of the first planetary gearset and the third gearset component of the second planetary gearset to the at least one stationary member;
- a fifth selective coupler which, when engaged, fixedly couples the second gearset component of the second planetary gearset, the third gearset component of the third planetary gearset, the second gearset component of the fourth planetary gearset, and the first gearset component of the fifth planetary gearset to the at least one stationary member;
- a sixth selective coupler which, when engaged, fixedly couples the third gearset component of the fourth planetary gearset to the at least one stationary member;
- and a seventh selective coupler which, when engaged, fixedly couples the second gearset component of the fifth planetary gearset to the at least one stationary member;
- and wherein the first gearset component of the first planetary gearset is a first sun gear, the first gearset component of the second planetary gearset is a second sun gear, the first gearset component of the third planetary gearset is a third sun gear, the first gearset component of the fourth planetary gearset is a fourth sun gear, the first gearset component of the fifth planetary gearset is a fifth sun gear, the second gearset component of the first planetary gearset is a first planet carrier, the second gearset component of the second planetary gearset is a second planet carrier, the second gearset component of the third planetary gearset is a third planet carrier, the second gearset component of the fourth planetary gearset is a fourth planet carrier, the second gearset component of the fifth planetary gearset is a fifth planet carrier, the third gearset component of the first planetary gearset is a first ring gear, the third gearset component of the second planetary gearset is a second ring gear, the third gearset component of the third planetary gearset is a third ring gear, the third gearset component of the fourth planetary gearset is a fourth ring gear, and the third gearset component of the fifth planetary gearset is a fifth ring gear.
14 more elements
Dependencies are inferred from the claim text.