Triple clutch multi-speed transmission
First Claim
Patent Images
1. A transmission comprising:
- an input member;
an output member;
a planetary gear set having first, second and third members;
a clutch assembly having a first, a second and a third torque-transmitting mechanism each selectively engageable to connect the input member with a respective different one of the members of the planetary gear set;
a first intermediate shaft connected for common rotation with the first member of the planetary gear set, wherein the first intermediate shaft is concentric with the input shaft;
a second intermediate shaft connected for common rotation with the second member of the planetary gear set, wherein the second intermediate shaft is concentric with the first intermediate shaft;
a first countershaft radially offset from the intermediate shafts;
a second countershaft radially offset from the intermediate shafts;
a first countershaft transfer gear connected for common rotation with the first countershaft and in communication with the output member to transfer torque from the first countershaft to the output member;
a second countershaft transfer gear connected for common rotation with the second countershaft and in communication with the output member to transfer torque from the second countershaft to the output member;
at least three co-planar intermeshing gear sets, wherein at least one of the gears of the at least three co-planar intermeshing gear sets is fixed for common rotation with at least one of the intermediate shafts and one of the at least three co-planar intermeshing gears includes a first gear in mesh with a second and third gear; and
a plurality of synchronizers, wherein at least one of the plurality of synchronizers is selectively engagable to connect at least one of the gears of the at least three co-planar intermeshing gear sets with at least one of the first and second countershafts for common rotation therewith and wherein at least one other of the plurality of synchronizers is selectively engageable to connect at least one of the gears of the at least three co-planar intermeshing gear sets with at least one other of the gears of the at least three co-planar intermeshing gear sets, thereby transferring torque from the planetary gear set to at least one of the first and second countershaft transfer gears through at least one of the intermediate shafts and at least one of the sets of co-planar intermeshing gear sets.
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Abstract
A transmission is disclosed having a planetary gear set with three input torque-transmitting mechanisms, such as friction clutches, to achieve torque flow through the planetary gear set to a countershaft gearing arrangement. The transmission includes an input member, an output member, a planetary gear set, an input clutch assembly having three input clutches and a countershaft gearing arrangement. The countershaft gearing arrangement is operatively connected with the planetary gear set and includes: at least three co-planar intermeshing gears, first and second countershafts, a first intermediate shaft and a second intermediate shaft concentric with the first intermediate shaft.
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Citations
21 Claims
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1. A transmission comprising:
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an input member; an output member; a planetary gear set having first, second and third members; a clutch assembly having a first, a second and a third torque-transmitting mechanism each selectively engageable to connect the input member with a respective different one of the members of the planetary gear set; a first intermediate shaft connected for common rotation with the first member of the planetary gear set, wherein the first intermediate shaft is concentric with the input shaft; a second intermediate shaft connected for common rotation with the second member of the planetary gear set, wherein the second intermediate shaft is concentric with the first intermediate shaft; a first countershaft radially offset from the intermediate shafts; a second countershaft radially offset from the intermediate shafts; a first countershaft transfer gear connected for common rotation with the first countershaft and in communication with the output member to transfer torque from the first countershaft to the output member; a second countershaft transfer gear connected for common rotation with the second countershaft and in communication with the output member to transfer torque from the second countershaft to the output member; at least three co-planar intermeshing gear sets, wherein at least one of the gears of the at least three co-planar intermeshing gear sets is fixed for common rotation with at least one of the intermediate shafts and one of the at least three co-planar intermeshing gears includes a first gear in mesh with a second and third gear; and a plurality of synchronizers, wherein at least one of the plurality of synchronizers is selectively engagable to connect at least one of the gears of the at least three co-planar intermeshing gear sets with at least one of the first and second countershafts for common rotation therewith and wherein at least one other of the plurality of synchronizers is selectively engageable to connect at least one of the gears of the at least three co-planar intermeshing gear sets with at least one other of the gears of the at least three co-planar intermeshing gear sets, thereby transferring torque from the planetary gear set to at least one of the first and second countershaft transfer gears through at least one of the intermediate shafts and at least one of the sets of co-planar intermeshing gear sets. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A transmission comprising:
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an input member; an output member; a planetary gear set having a sun gear, a carrier member and a ring gear, wherein the carrier member rotatably supports a first and second set of planet gears and wherein the first set of planet gears intermeshes with the sun gear and the second set of planet gears and the second set of planet gears intermeshes with the ring gear and the first set of planet gears; a clutch assembly having a first, a second and a third clutch, wherein the first clutch is selectively engageable to connect the input member with the ring gear of the planetary gear set, the second clutch is selectively engageable to connect the input member with the carrier member of the planetary gear set and the third clutch is selectively engageable to connect the input member with the sun gear of the planetary gear set; a first intermediate shaft connected for common rotation with the sun gear of the planetary gear set, wherein the first intermediate shaft is concentric with the input shaft; a second intermediate shaft connected for common rotation with the carrier member of the planetary gear set, wherein the second intermediate shaft is concentric with the first intermediate shaft; a first countershaft radially offset from the intermediate shafts and in communication with the output member; a second countershaft radially offset from the intermediate shafts and in communication with the output member; a first, second and third co-planar intermeshing gear sets, wherein the first co-planar intermeshing gear set has a first gear intermeshing with a second and third gear and the second and third co-planar intermeshing gear set has a first gear intermeshing with second gear, wherein the first gears of the second and third co-planar intermeshing gear sets are fixed for common rotation with the first intermediate shaft and the first gear of the first co-planar intermeshing gear sets is fixed for common rotation with the second intermediate shaft; and a four synchronizers, wherein three of the plurality of synchronizers are selectively engagable to connect at least one of the gears of the at least three co-planar intermeshing gear sets with at least one of the first and second countershafts for common rotation therewith and wherein the fourth synchronizer is selectively engageable to connect at least one of the gears of the at least three co-planar intermeshing gear sets with at least one other of the gears of the at least three co-planar intermeshing gear sets, thereby transferring torque from the planetary gear set to at least one of the first and second countershaft transfer gears through at least one of the intermediate shafts and at least one of the sets of co-planar intermeshing gear sets. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification