Transfer case with a tri-mode bi-directional clutch assembly
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16H-037/08
F16H-003/44
F16D-011/06
F16D-013/14
출원번호
US-0794712
(2004-03-05)
발명자
/ 주소
Williams, Randolph C.
출원인 / 주소
American Axle &
Manufacturing, Inc.
대리인 / 주소
Harness, Dickey &
인용정보
피인용 횟수 :
25인용 특허 :
49
초록▼
An on-demand two-speed transfer case is equipped with a planetary gearset assembly and a range shift mechanism to provide high-range and low-range drive connections. The transfer case is also equipped with a dual-mode bi-directional overrunning clutch and a mode shift mechanism to establish on-deman
An on-demand two-speed transfer case is equipped with a planetary gearset assembly and a range shift mechanism to provide high-range and low-range drive connections. The transfer case is also equipped with a dual-mode bi-directional overrunning clutch and a mode shift mechanism to establish on-demand and part-time four-wheel drive modes. Further, the transfer case includes a disconnect clutch and a disconnect shift mechanism to establish a two-wheel drive mode in addition to the four-wheel drive modes.
대표청구항▼
1. A transfer case comprising:an input shaft;first and second output shafts;a reduction unit having an input member driven by said input shaft and an output member driven at a reduced speed relative to said input member;a range clutch operable in a first mode to couple said first output shaft for ro
1. A transfer case comprising:an input shaft;first and second output shafts;a reduction unit having an input member driven by said input shaft and an output member driven at a reduced speed relative to said input member;a range clutch operable in a first mode to couple said first output shaft for rotation with said input shaft to establish a high-range drive connection therebetween, said range clutch is further operable in a second mode to couple said first output shaft for rotation with said output member to establish a low-range drive connection between said input shaft and said first output shaft;a transfer assembly;a bi-directional overrunning mode clutch operable in a first mode to permit relative rotation between said first output shaft and said transfer assembly in a first direction and prevent relative rotation therebetween in a second direction, said mode clutch further operable in a second mode to prevent relative rotation between said first output shaft and said transfer assembly in both directions;a disconnect clutch operable in a first mode to couple said second output shaft for rotation with said transfer assembly and in a second mode to release said second output shaft from coupled engagement with said transfer assembly; anda shift mechanism for shifting said range clutch between its first and second modes, said mode clutch between its first and second modes, and said disconnect clutch between its first and second modes.2. The transfer case of claim 1 wherein said mode clutch includes a mode actuator that is moveable between first and second position to establish said corresponding first and second modes, wherein said range clutch includes a range actuator that is moveable between first and second positions to establish said corresponding first and second modes, and wherein said disconnect clutch includes a disconnect actuator that is moveable between first and second positions to establish said corresponding first and second modes.3. The transfer case of claim 2 wherein said shift mechanism is operable to coordinate movement of said mode actuator, said range actuator, and said disconnect actuator.4. The transfer case of claim 2 wherein an on-demand four-wheel high-range drive mode is established when said mode actuator is in its first position, said range actuator is in its first position, and said disconnect actuator is in its first position.5. The transfer case of claim 2 wherein a part-time four-wheel high-range drive mode is established when said mode actuator is in its second position, said range actuator is in its first position, and said disconnect actuator is in its first position.6. The transfer case of claim 2 wherein a two-wheel high-range drive mode is established when said mode actuator is in its second position, said range actuator is in its first position, and said disconnect actuator is in its second position.7. The transfer case of claim 1 wherein said bi-directional overrunning mode clutch includes a first ring driven by said first output shaft, a second ring, and rollers engaging cam surfaces of said first and second rings, said second ring is adapted to circumferentially index relative to said first ring to cause said rollers to frictionally couple said second ring to said transfer assembly.8. The transfer case of claim 7 wherein said transfer assembly includes a first sprocket rotatably supported on said first output shaft, and a second sprocket rotatably supported on said second output shaft and operably driven by said first sprocket, wherein said second ring of said mode clutch is adapted to releaseably engage said first sprocket for selectively transferring drive torque from said first output shaft to said transfer assembly, and wherein said disconnect clutch is operable in its first mode to couple said second sprocket to said second output shaft.9. The transfer case of claim 7 wherein said second ring is a split ring defining an actuation slot having first and second end surfaces, and wherein said mode clutch further includes an actuator ring having a lug retained in said actuation slot of said split ring and which is moveable from central position disengaged from said first and second end surfaces in a first direction into engagement with said first end surface and in a second direction into engagement with said second end surface.10. A transfer case comprising:an input shaft;first and second output shafts;a reduction unit having an input member driven by said input shaft and an output member driven at a reduced speed relative to said input member;a range clutch operable in a first mode to couple said first output shaft to said input member and in a second mode to couple said first output shaft to said output member;a transfer assembly driving said second output shaft;a bi-directional overrunning mode clutch operable in a first mode to permit relative rotation between said first output shaft and said transfer assembly in a first direction and prevent relative rotation therebetween in a second direction, said mode clutch is further operable in a second mode to prevent relative rotation between said first output shaft and said transfer assembly in both directions;a disconnect clutch operable in a first mode to couple said mode clutch to said first output shaft and in a second mode to release said mode clutch from coupled engagement with said first output shaft; anda shift mechanism for shifting said range clutch between its first and second modes, said mode clutch between its first and second modes, and said disconnect clutch between its first and second modes.11. The transfer case of claim 10 wherein said mode clutch includes a mode actuator that is moveable between first and second position to establish said corresponding first and second modes, wherein said range clutch includes a range actuator that is moveable between first and second positions to establish said corresponding first and second modes, and wherein said disconnect clutch includes a disconnect actuator that is moveable between first and second position to establish said corresponding first and second modes.12. The transfer case of claim 11 wherein said shift mechanism is operable to coordinate movement of said mode actuator, said range actuator, and said disconnect actuator.13. The transfer case of claim 12 wherein said shift mechanism comprises;a rotary cam plate having first, second and third cam surfaces;a range shift device having a first follower engaging said first cam surface such that rotation of said cam plate controls movement of said range actuator between its first and second positions;a mode shift device having a second follower engaging said second cam surface such that rotation of said cam plate controls movement of said mode actuator between its first and second positions;a disconnect shift device having a third follower engaging said third cam surface such that rotation of said cam plate controls movement of said disconnect actuator between its first and second positions; anda power-operated actuator for rotating said cam plate.14. The transfer case of claim 13 wherein rotation of said cam plate to a first position causes said mode actuator to be located in its first positions, said range actuator to be located in its first position and said disconnect actuator to be located in its first position so as to establish an on-demand four-wheel high-range drive mode.15. The transfer case of claim 14 wherein rotation of said cam plate to a second position causes said mode actuator to be located in its second position, said range actuator to be located in its first position and said disconnect actuator to be located in its first position so as to establish a part-time four-wheel high-range drive mode.16. The transfer case of claim 15 wherein rotation of said cam plate to a third position cause said mode actuator to be located in its second position, said range actuator to be located in its first position and said disconnect actuator to be located in its second position so as to establish a two-wheel high-range drive mode.17. The transfer case of claim 10 wherein said mode clutch includes a first ring rotatably supported on said first output shaft, a second ring, and rollers engaging cam surfaces formed in said first and second rings, wherein said disconnect clutch is operable in its first mode to releaseably couple said first ring for rotation with said first output shaft, and wherein said second ring is adapted to circumferentially index relative to said first ring to cause said rollers to frictionally couple said second ring to said transfer assembly.18. A transfer case comprising:an input shaft;first and second output shafts;a reduction unit having an input member driven by said input shaft and an output member driven at a reduced speed relative to said input shaft;a range clutch operable in a first mode to couple said first output shaft for rotation with said input shaft to establish a high-range drive connection therebetween, said range clutch is further operable in a second mode to couple said first output shaft to said output member to establish a low-range drive connection between said input shaft and said first output shaft;a transfer assembly;a bi-directional overrunning mode clutch operable in a first mode to permit relative rotation between said second output shaft and said transfer assembly in a first direction and prevent relative rotation therebetween in a second direction, said mode clutch further operable in a second mode to prevent relative rotation between said second output shaft and said transfer assembly in both directions;a disconnect clutch operable in a first mode to couple said transfer assembly for rotation with said first output shaft and in a second mode to release said transfer assembly from coupled engagement with said first output shaft; anda shift mechanism for shifting said range clutch between its first and second modes, said mode clutch between its first and second modes, and said disconnect clutch between its first and second modes.19. The transfer case of claim 18 further comprising:a power-operated actuator for controlling operation of said shift mechanism;a mode selector permitting selection of at least three different drive modes; anda controller receiving mode signals from said mode selector and controlling actuation of said power-operated actuator in response to said mode signals.20. The transfer case of claim 18 wherein said mode clutch includes a mode actuator that is moveable between first and second position to establish corresponding first and second modes, wherein said range clutch includes a range actuator that is moveable between first and second positions to establish corresponding first and second modes, and wherein said disconnect clutch includes a disconnect actuator that is moveable between first and second positions to establish corresponding first and second modes.21. The transfer case of claim 20 wherein said shift mechanism is operable to coordinate movement of said mode actuator, said range actuator, and said disconnect actuator.22. The transfer case of claim 18 wherein said mode clutch includes a first ring rotatably supported on said second output shaft, a second ring, and rollers disposed in cam tracks between said first and second rings, wherein said second ring can circumferentially index relative to said first ring so as to cause said rollers to engage said cam tracks and couple said second ring to said transfer assembly.23. A transfer case comprising:a first output shaft;a second output shaft;a transfer assembly;a bi-directional overrunning mode clutch operably disposed between said transfer assembly and said second output shaft, said mode clutch is operable in an AUTO mode to permit relative rotation between said second output shaft and said transfer assembly in a first direction and prevent relative rotation therebetween in a second direction, and said mode clutch is operable in a LOCK mode to prevent relative rotation between said second output shaft and said transfer assembly in both directions;a disconnect clutch operable in a 2WD mode to release said first output shaft from coupled engagement with said transfer assembly and in a 4WD mode to couple said first output shaft for rotation with said transfer assembly; anda shift mechanism for shifting said mode clutch between its AUTO and LOCK modes and said disconnect clutch between its 2WD and 4WD modes.24. The transfer case of claim 23 wherein said mode clutch includes a mode actuator that is moveable between first and second position to establish said AUTO and LOCK modes, wherein said disconnect clutch includes a disconnect actuator that is moveable between first and second positions to establish said 2WD and 4WD modes, and wherein said shift mechanism is operable to coordinate movement of said mode actuator and said disconnect actuator.25. The transfer case of claim 24 wherein an on-demand four-wheel drive mode is established when said mode actuator is in its first position and said disconnect actuator is in its second position, wherein a part-time four-wheel drive mode is established when said mode actuator is in its second position and said disconnect actuator is in its second position, and wherein a two-wheel drive mode is established when said mode actuator is in its second position and said disconnect actuator is in its first position.26. The transfer case of claim 23 wherein said bi-directional overrunning mode clutch includes a first ring driven by said second output shaft, a second ring, and rollers in rolling engagement with cam surfaces formed in said first and second rings, and wherein said second ring is adapted to circumferentially index relative to said first ring to cause said rollers to engage said cam surfaces and frictionally couple said second ring to said transfer assembly.27. The transfer case of claim 26 wherein said transfer assembly includes a first sprocket rotatably supported on said first output shaft, and a second sprocket that is rotatably supported on said second output shaft and operably driven by said first sprocket, wherein said second ring of said mode clutch is adapted to releaseably engage said sprocket, and wherein said disconnect clutch is operable in its 4WD mode to releaseably couple said first sprocket to said first output shaft.28. A transfer case comprising:a first output shaft;a second output shaft;a transfer assembly driving said second output shaft;a bi-directional overrunning mode clutch operably disposed between said transfer assembly and said first output shaft, said mode clutch is operable in an AUTO mode to permit relative rotation between said first output shaft and said transfer assembly in a first direction and prevent relative rotation therebetween in a second direction, and said mode clutch is operable in a LOCK mode to prevent relative rotation between said first output shaft and said transfer assembly in both directions;a disconnect clutch operable in a 2WD mode to release said mode clutch from coupled engagement with said first output shaft and in a 4WD mode to couple said mode clutch to said first output shaft; anda shift mechanism for shifting said mode clutch between its AUTO and LOCK modes and said disconnect clutch between its 2WD and 4WD modes.29. The transfer case of claim 28 wherein said mode clutch includes a mode actuator that is moveable between first and second position to establish said AUTO and LOCK modes, wherein said disconnect clutch includes a disconnect actuator that is moveable between first and second positions to establish said 2WD and 4WD modes, and wherein said shift mechanism is operable to coordinate movement of said mode actuator and said disconnect actuator.30. The transfer case of claim 29 wherein an on-demand four-wheel drive mode is established when said mode actuator is in its first position and said disconnect actuator is in its second position, wherein a part-time four-wheel drive mode is established when said mode actuator is in its second position and said disconnect actuator is in its second position, and wherein a two-wheel drive mode is established when said mode actuator is in its second position and said disconnect actuator is in its first position.31. The transfer case of claim 28 wherein said bi-directional overrunning mode clutch includes a first ring supported on said first output shaft, a second ring, and rollers in rolling engagement with facing cam surfaces of said first and second rings, said second ring is adapted to circumferentially index relative to said first ring to cause said rollers to engage said cam surfaces and frictionally couple said second ring to said transfer assembly.32. The transfer case of claim 31 wherein said transfer assembly includes a first sprocket surrounding said first output shaft and a second sprocket that is fixed to said second output shaft and operably driven by said first sprocket, wherein said second ring of said mode clutch is adapted to releaseably engage said first sprocket, and wherein said disconnect clutch is operable in its 4WD mode to couple said first ring for rotation with said first output shaft.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (49)
Showalter Dan J., Acceleration sensitive double overrunning clutch.
Varma Sanjeev K. (Syracuse NY) Williams Randolph C. (Weedsport NY) Sperduti David (Auburn NY) Wilson Robert J. (Warners NY) Reagan Edward J. (Skaneateles NY), Full-time four wheel drive transfer case.
Bakowski Richard A. (Warners NY) Eastman Richard E. (Central Square NY), Full-time transfer case with synchronized range shift mechanism and on-demand differentiation control.
Wilson Robert J. (6711 Pottery Rd. Warners NY 13164) Williams Randolph C. (8836 S. Willow St. Weedsport NY 13166) Zalewski John D. (303 Balsam St. Liverpool NY 13088) Varma Sanjeev K. (2406 Euclid Av, Full-time transfer case with synchronized single planetary gear reduction unit.
Watson Will (Southfield MI) Miller Alan L. (Ithaca NY) Sundquist Drew A. (Canton MI) Simpson Roger T. (Ithaca NY) Ducklow Diane K. (Farmington MI) Beckerman Joseph W. (Livonia MI) Showalter Dan J. (P, On demand vehicle drive system.
Wilson Robert J. (Warners NY) Sperduti David (Auburn NY) Eastman Richard E. (Central Square NY) Adler Randy W. (Seneca Falls NY) Winks Joseph A. (West Monroe NY), Power transfer system for a four-wheel drive vehicle.
Wilson Robert J. (Warners NY) Sperduti David (Auburn NY) Eastman Richard E. (Central Square NY) Divecha Neville K. (Camillus NY) Winks Joseph A. (West Monroe NY), Rotary actuation mechanism for torque modulated transfer case.
Williams Randolph C. (Weedsport NY) Eastman Richard E. (Central Square NY) Varma S. K. (Syracuse NY), Transfer case limited slip planetary differential.
Zalewski John D. ; Mohan Sankar K. ; Schleuder Carl D. ; Fanning Ellen M. ; Burns Timothy M. ; Conklin Douglas, Two-speed transfer case with on-demand torque control having a coupling pump and a supply pump.
Reed, Jr., Richard G; Kubina, Joseph E; Kirk, Michael P; Schmanski, Donald F; Pachucki, Kenneth M; Gradu, Mircea, Multi-mode drive system for transaxle applications.
Reed, Richard G.; Kubina, Joseph E.; Kirk, Michael P.; Schmanski, Donald F.; Pachucki, Kenneth M.; Gradu, Mircea, Multi-mode drive system for transaxle applications.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.