Hydrokinetic torque coupling device having axially movable turbine-piston and lockup clutch, and related methods
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16H-045/02
F16F-015/00
F16D-013/40
F16D-025/0635
F16D-033/18
F16H-039/42
출원번호
US-0168954
(2016-05-31)
등록번호
US-10234008
(2019-03-19)
발명자
/ 주소
Arhab, Rabah
Medellin, Alfonso
Sanchez, Jorge
출원인 / 주소
Valeo Embrayages
대리인 / 주소
Berenato & White, LLC
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
A hydrokinetic torque coupling device comprises a casing, a torque converter, a torsional vibration damper and a lockup clutch disposed within the casing. The torque converter comprises an impeller and a turbine-piston coaxially aligned with the impeller and axially movable toward and away from the
A hydrokinetic torque coupling device comprises a casing, a torque converter, a torsional vibration damper and a lockup clutch disposed within the casing. The torque converter comprises an impeller and a turbine-piston coaxially aligned with the impeller and axially movable toward and away from the casing to position the hydrokinetic torque coupling device into and out of a lockup mode in which the turbine-piston is non-rotatably frictionally coupled to the casing. The torsional vibration damper comprises an input member non-moveably secured to the turbine-piston, a first retainer plate and the elastic members elastically coupling the input member to the first retainer plate. The input member includes an actuating portion configured to actuate the lockup clutch. The lockup clutch is disposed within the casing between the actuating portion of the input member and a cover shell of the casing for frictionally coupling the casing and the turbine-piston.
대표청구항▼
1. A hydrokinetic torque coupling device for coupling together a driving shaft and a driven shaft, the hydrokinetic torque coupling device comprising: a casing rotatable about a rotational axis and comprising an impeller shell and a cover shell non-moveably connected to the impeller shell;a torque c
1. A hydrokinetic torque coupling device for coupling together a driving shaft and a driven shaft, the hydrokinetic torque coupling device comprising: a casing rotatable about a rotational axis and comprising an impeller shell and a cover shell non-moveably connected to the impeller shell;a torque converter coaxially aligned with and rotatable about the rotational axis, the torque converter disposed within the casing and comprising an impeller and a turbine-piston hydro-dynamically drivable by the impeller and coaxially aligned with the impeller, the turbine-piston being axially movable toward and away from the casing to position the hydrokinetic torque coupling device into and out of a lockup mode in which the turbine-piston is non-rotatably frictionally coupled to the casing;a torsional vibration damper comprising: an input member rotatable about the rotational axis and non-movably secured to the turbine-piston, the input member including an actuating portion;a first retainer plate rotatable relative to the input member coaxially with the rotational axis; anda plurality of damper elastic members interposed between the first retainer plate and the input member, the damper elastic members elastically coupling the input member to the first retainer plate; anda lockup clutch disposed within the casing between the input member and the cover shell of the casing for frictionally coupling the casing and the turbine-piston, the actuating portion of the input member configured to actuate the lockup clutch. 2. The hydrokinetic torque coupling device as defined in claim 1, further comprising an output hub elastically coupled to the turbine-piston via the torsional vibration damper; and wherein the first retainer plate of the torsional vibration damper is non-rotatably secured to the output hub. 3. The hydrokinetic torque coupling device as defined in claim 1, wherein the torsional vibration damper further comprises a second damper retainer plate non-movably secured to the first damper retainer plate coaxially with the rotational axis, wherein the damper elastic members are disposed axially between the first and second damper retainer plates, and wherein the second damper retainer plate is elastically connected to the input member via the damper elastic members. 4. The hydrokinetic torque coupling device as defined in claim 3, further comprising an output hub elastically coupled to the turbine-piston via the torsional vibration damper, and wherein both the first and second damper retainer plates of the torsional vibration damper are non-rotatably secured to the output hub. 5. The hydrokinetic torque coupling device as defined in claim 1, wherein the input member further includes an annular, radially extending central portion coaxial with the rotational axis, an annular connection portion formed integrally with and extending substantially axially from the central portion, and wherein the actuating portion is formed integrally with and radially outwardly extends from the connection portion. 6. The hydrokinetic torque coupling device as defined in claim 1, wherein the lockup clutch is disposed between the cover shell and the turbine-piston. 7. The hydrokinetic torque coupling device as defined in claim 1, wherein the damper elastic members are disposed circumferentially in series relative to each other. 8. A hydrokinetic torque coupling device for coupling together a driving shaft and a driven shaft, the hydrokinetic torque coupling device comprising: a casing rotatable about a rotational axis and comprising an impeller shell and a cover shell non-moveably connected to the impeller shell;a torque converter coaxially aligned with and rotatable about the rotational axis, the torque converter disposed within the casing and comprising an impeller and a turbine-piston hydro-dynamically drivable by the impeller and coaxially aligned with the impeller, the turbine-piston being axially movable toward and away from the casing to position the hydrokinetic torque coupling device into and out of a lockup mode in which the turbine-piston is non-rotatably frictionally coupled to the casing;a torsional vibration damper comprising: an input member rotatable about the rotational axis and non-movably secured to the turbine-piston, the input member including an actuating portion;a first retainer plate rotatable relative to the input member coaxially with the rotational axis; anda plurality of damper elastic members interposed between the first retainer plate and the input member, the damper elastic members elastically coupling the input member to the first retainer plate; anda lockup clutch disposed within the casing between the input member and the cover shell of the casing for frictionally coupling the casing and the turbine-piston, the actuating portion of the input member configured to actuate the lockup clutch;the lock-up clutch including a friction disc non-rotatably coupled to and axially movable relative to the input member of the torsional vibration damper,the friction disc disposed axially between the casing and the actuating portion of the input member,the actuating portion of the input member configured to press the friction disc axially in the direction toward the casing so as to frictionally lock the turbine-piston to the casing in the lockup mode. 9. The hydrokinetic torque coupling device as defined in claim 8, wherein the input member of the torsional vibration damper has a plurality of axial grooves circumferentially spaced from one another, and wherein the friction disc comprises radial guide teeth extending radially inwardly from an inner peripheral edge thereof and engaging the axial grooves of the input member such that the friction disc is axially slideable and non-rotatable relative to the input member. 10. The hydrokinetic torque coupling device as defined in claim 8, wherein the lock-up clutch further includes a first backing disc non-rotatably coupled to and axially movable relative to the casing, and wherein the first backing disc is disposed axially between the cover shell of the casing and the friction disc. 11. The hydrokinetic torque coupling device as defined in claim 10, wherein the casing has a plurality of axial grooves formed integrally therewith and circumferentially spaced from one another, and wherein the first backing disc comprises radial guide teeth extending radially outwardly from an outer peripheral edge thereof and engaging the axial grooves of the casing such that the first backing disc is axially slideable and non-rotatable relative to the casing. 12. The hydrokinetic torque coupling device as defined in claim 11, wherein the lock-up clutch further includes a second backing disc non-rotatably coupled to and axially moveable relative to the casing, and wherein the second backing disc is disposed axially between the actuating portion of the input member and the friction disc. 13. The hydrokinetic torque coupling device as defined in claim 12, wherein the casing has a plurality of axial grooves formed integrally therewith and circumferentially spaced from one another, and wherein the second backing disc comprises radial guide teeth extending radially outwardly from an outer peripheral edge thereof and engaging the axial grooves of the casing such that the second backing disc is axially slideable and non-rotatable relative to the casing. 14. The hydrokinetic torque coupling device as defined in claim 13, further comprising an elastic preload element exerting a preload torque to clamp one of the guide teeth of at least one of the first and second backing discs circumferentially against one of faces of one of the axial grooves of the casing, the elastic preload element is interposed axially between the guide tooth of the first backing disc and the guide tooth of the second backing disc, the elastic preload element is mounted circumferentially loaded so as to exert a circumferential force so as to produce the preload torque to separate the guide teeth of the first and second backing discs circumferentially against each of the upstream and downstream faces of one of the guide grooves of the casing. 15. The hydrokinetic torque coupling device as defined in claim 14, wherein the elastic preload element is an elastically deformable element formed by at least one elastically flexible strip oriented circumferentially, wherein an upstream end of the elastically flexible strip is fixed to the guide tooth of the first backing disc, and wherein a downstream end of the elastically flexible strip is fixed to the guide tooth of the second backing disc. 16. The hydrokinetic torque coupling device as defined in claim 15, wherein, in its non-loaded state, the elastically flexible strip is axially cambered so that its upstream end is offset axially with respect to its downstream end, wherein elastically flexible strip is in a loaded state whenever the turbine-piston is in the non-lockup mode so as to produce the preload torque. 17. The hydrokinetic torque coupling device as defined in claim 12, wherein the first and second backing discs are non-rotatably coupled to and axially moveable relative to the cover shell of the casing, and wherein the friction disc is interposed axially between the first and second backing discs. 18. A method of assembling a hydrokinetic torque coupling device for coupling together a driving shaft and a driven shaft together, comprising the steps of: providing an impeller shell and a cover shell of a casing;providing a preassembled torque converter comprising an impeller, a turbine-piston and a stator;providing a preassembled torsional vibration damper rotatable about a rotational axis and comprising:an input member including an actuating portion;a first retainer plate coaxially with and rotatable relative to the input member; anda plurality of damper elastic members interposed between the first retainer plate and the input member, the damper elastic members elastically coupling the input member to the first retainer plate;non-moveably securing the input member of the torsional vibration damper to the turbine-piston of the torque converter coaxially with the rotational axis;mounting a lockup clutch within the cover shell of the casing;mounting the cover shell to the impeller shell so that the lockup clutch is disposed between the input member and the cover shell coaxially with the rotational axis for frictionally coupling the casing and the turbine-piston; andnon-moveably securing the impeller shell to the cover shell so as to define the casing. 19. The method as defined in claim 18, wherein the lock-up clutch includes a friction disc (70), and wherein the step of mounting the cover shell to the impeller shell includes the step of mounting the friction disc to the input member axially between the casing and the actuating portion (64) of the input member (50) so that the friction disc (70) is axially moveable and non-rotatable relative to the input member (50). 20. The method as defined in claim 19, wherein the lock-up clutch (18) further includes a first backing disc (72A) disposed axially between the casing (12) and the friction disc (70), and wherein the step of mounting the lockup clutch (18) within the cover shell (24) of the casing (12) includes the step of mounting the first backing disc (72A) to the cover shell (24) of the casing (12) axially between the casing (12) and the friction disc (70) so that the first backing disc (72A) is axially moveable and non-rotatable relative to the cover shell (24).
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