Back to results
US 12,612,954 B2Granted
Multi-speed planetary transmission
AssigneeAllison Transmission, Inc.
InventorsShuo Zhang, Isaac Mock
Life of this patent
Estimating the term…
Abstract
A multi-speed transmission including a plurality of planetary gearsets and a plurality of selective couplers is disclosed. The multi-speed transmission may include a retarder including a retarder housing, a rotor positioned in the retarder housing and fixedly coupled to a portion of the plurality of planetary gearsets, and a stator positioned in the retarder housing and fixedly coupled to at least one stationary member.
Claims19
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, the second gearset component of the fourth planetary gearset, and the third gearset component of the fifth planetary gearset together;
- a second interconnector which fixedly couples the second gearset component of the first planetary gearset to the third gearset component of the second planetary gearset;
- 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;
- a plurality of selective couplers, the plurality of selective couplers including:
- a first selective coupler which, when engaged, fixedly couples 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 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 third 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 third 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;
- a retarder including a retarder housing, a rotor 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 and positioned in the retarder housing, and a stator positioned in the retarder housing and fixedly coupled to the at least one stationary member;
- wherein the at least one stationary member includes a first housing having a first interior and second housing having a second interior, the second housing being removably coupled to the first housing;
- wherein the first planetary gearset, the second planetary gearset, and the third planetary gearset are received in the first interior of the first housing and the fourth planetary gearset and the fifth planetary gearset being received in the second interior of the second housing;
- wherein the second interconnector is positioned in the first interior of the first housing;
- wherein the third interconnector is positioned in the first interior of the first housing;
- wherein the first selective coupler is positioned in the first interior of the first housing.
19 more elements
A transmission comprising:
- at least one stationary member including a first housing having a first interior and second housing having a second interior, the second housing being removably coupled to the first housing;
- 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, the first planetary gearset, the second planetary gearset, and the third planetary gearset being received in the first interior of the first housing and the fourth planetary gearset and the fifth planetary gearset being received in the second interior of the second housing;
- 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 first gearset component of the fifth planetary gearset;
- a first interconnector including a first portion which fixedly couples the second gearset component of the second planetary gearset and the third gearset component of the third planetary gearset and a second portion which fixedly couples the second gearset component of the fourth planetary gearset and the third gearset component of the fifth planetary gearset together, the first portion of the first interconnector being removably coupled to the second portion of the first interconnector;
- a second interconnector which fixedly couples the second gearset component of the first planetary gearset to the third gearset component of the second planetary gearset;
- 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;
- a plurality of selective couplers, the plurality of selective couplers including:
- a first selective coupler which, when engaged, fixedly couples 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, the first selective coupler being positioned in the first interior of the first housing;
- a second selective coupler which, when engaged, fixedly couples 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 third 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, the third selective coupler being positioned in the first interior of the first housing;
- 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, the fourth selective coupler being positioned in the first interior of the first housing;
- 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 third 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, the sixth selective coupler being positioned in the second interior of the second housing;
- 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, the seventh selective coupler being positioned in the second interior of the second housing.
13 more elements
A transmission comprising:
- at least one stationary member including a first housing having a first interior and second housing having a second interior, the second housing being removably coupled to the first housing;
- 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, the first planetary gearset, the second planetary gearset, and the third planetary gearset being received in the first interior of the first housing and the fourth planetary gearset and the fifth planetary gearset being received in the second interior of the second housing;
- 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 second gearset component of the second planetary gearset, the third gearset component of the third planetary gearset, and the second gearset component of the fourth planetary gearset together;
- a second interconnector which fixedly couples the second gearset component of the first planetary gearset to the third gearset component of the second planetary gearset, the second interconnector being positioned in the first interior of the first housing;
- a third interconnector which fixedly couples the first gearset component of the second planetary gearset to the first gearset component of the third planetary gearset, the third interconnector being positioned in the first interior of the first housing;
- a fourth interconnector which fixedly couples the third gearset component of the fourth planetary gearset to the first gearset component of the fifth planetary gearset, the fourth interconnector being positioned in the second interior of the second housing;
- and
- a plurality of selective couplers, wherein the plurality of selective couplers include a first number of clutches and a second number of brakes, wherein the second number is more than twice the first number.
7 more elements
Dependencies are inferred from the claim text.