Power transmission devices having torque transfer coupling with power-operated clutch actuator
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16D-021/04
F16D-021/00
F16D-027/00
출원번호
US-0503893
(2006-08-14)
등록번호
US-7258213
(2007-08-21)
발명자
/ 주소
Ekonen,Todd
Bradley,Douglas
출원인 / 주소
Magna Powertrain USA, Inc.
대리인 / 주소
Harness, Dickey & Pierce, P.L.C.
인용정보
피인용 횟수 :
4인용 특허 :
33
초록▼
A torque transfer mechanism is provided for controlling the magnitude of a clutch engagement force exerted on a multi-plate clutch assembly that is operably disposed between a first rotary and a second rotary member. The torque transfer mechanism includes a power-operated face gear clutch actuator f
A torque transfer mechanism is provided for controlling the magnitude of a clutch engagement force exerted on a multi-plate clutch assembly that is operably disposed between a first rotary and a second rotary member. The torque transfer mechanism includes a power-operated face gear clutch actuator for generating and applying a clutch engagement force on the clutch assembly.
대표청구항▼
What is claimed is: 1. A power transmission device comprising: a rotary input member adapted to receive drive torque from a power source; a rotary output member adapted to transmit drive torque to an output device; a torque transfer mechanism for transferring drive torque from said input member to
What is claimed is: 1. A power transmission device comprising: a rotary input member adapted to receive drive torque from a power source; a rotary output member adapted to transmit drive torque to an output device; a torque transfer mechanism for transferring drive torque from said input member to said output member, said torque transfer mechanism including a friction clutch operably disposed between said input and output members and a clutch actuator for controlling adaptive engagement of said friction clutch, said clutch actuator including an electric motor, a drive gear driven by said electric motor, first and second face gears meshed with said drive gear for rotation in opposite directions, and an apply mechanism for varying the magnitude of a clutch engagement force exerted on said friction clutch in response to relative rotation between said first and second face gears; and a control system for actuating said electric motor so as to control the direction and amount of rotation of said drive gear. 2. The power transmission device of claim 1 wherein said apply mechanism includes an apply plate that is axially moveable between first and second positions in response to rotation of said first face gear relative to said second face gear, said apply plate is operable in its first position to exert a minimum clutch engagement force on said friction clutch and is further operable in its second position to exert a maximum clutch engagement face on said friction clutch. 3. The power transmission device of claim 2 wherein said apply plate is fixed for rotation with said first face gear, and wherein said apply mechanism further includes a reaction plate fixed for rotation with said second face gear and a cam arrangement disposed between said apply plate and said reaction plate that is operable to cause axial movement of said apply plate between its first and second positions in response to relative rotation between said first and second face gears. 4. The power transmission device of claim 1 wherein said first face gear includes a first hub segment rotatably supported on said input member and a first ring segment having first gear teeth formed on a first face surface, wherein said second face gear includes a second hub segment rotatably supported on said first hub segment and a second ring segment having second gear teeth formed on a second face surface, and wherein said drive gear is meshed with said first and second gear teeth. 5. The power transmission device of claim 4 wherein said drive gear is fixed to a shaft driven by said electric motor with said drive gear located between said first and second face surfaces of said first and second face gears, respectively. 6. The power transmission device of claim 1 wherein said control system includes a controller for receiving input signals from a sensor and generating electric control signals based on said input signals which are supplied to said electric motor for controlling the direction and amount of rotary movement of said drive gear. 7. The power transmission device of claim 1 wherein said first face gear is rotatable relative to said second face gear between a first position and a second position in response to activation of said electric motor for causing corresponding axial movement of an apply plate between a retracted position and an extended position relative to said friction clutch, said apply plate exerting a minimum clutch engagement force on said friction clutch when located in its retracted position and exerting a maximum clutch engagement force on said friction clutch when located in its extended position. 8. The power transmission device of claim 7 wherein said input member provides drive torque to a first driveline of a motor vehicle, wherein said output member is coupled to a second driveline of the motor vehicle, and wherein said torque transfer mechanism is operable to transfer drive torque from said input member to said output member. 9. The power transmission device of claim 8 defining a transfer case wherein said input member is a first shaft driving the first driveline and said output member is a second shaft coupled to the second driveline, wherein location of said apply plate in its retracted position releases engagement of said friction clutch so as to define a two-wheel drive mode and location of said apply plate in its extended position fully engages said friction clutch so as to define a part-time four-wheel drive mode, and wherein said control system is operable to control activation of said electric motor for varying the position of said apply plate between its retracted and extended positions to controllably vary the drive torque transferred from said first shaft to said second shaft so as to define an on-demand four-wheel drive mode. 10. The power transmission device of claim 8 defining a power take-off unit wherein said input member provides drive torque to a first differential associated with the first driveline, and wherein said output member is coupled to a second differential associated with the second driveline. 11. The power transmission device of claim 1 wherein said input member is a propshaft driven by a drivetrain of a motor vehicle and said output member is a pinion shaft driving a differential associated with an axle assembly of the motor vehicle, and wherein said friction clutch is disposed between said propshaft and said pinion shaft such that actuation of said clutch actuator is operable to transfer drive torque from said propshaft to said pinion shaft. 12. The power transmission device of claim 1 wherein said input member includes a first differential supplying drive torque to a pair of first wheels in a motor vehicle and a transfer shaft driven by said differential, wherein said output member includes a propshaft coupled to a second differential interconnecting a pair of second wheels in the motor vehicle, and wherein said friction clutch is disposed between said transfer shaft and said propshaft. 13. The power transmission device of claim 1 wherein said input member includes a first shaft supplying drive torque to a second shaft which is coupled to a first differential for driving a pair of first wheels in a motor vehicle, wherein said output member is a third shaft driving a second differential interconnecting a pair of second wheels of the motor vehicle, and wherein said friction clutch is operably disposed between said first and third shafts. 14. The power transmission device of claim 1 further including an interaxle differential driven by said input member and having a first output driving a first driveline in a motor vehicle and a second output driving a second driveline in the motor vehicle, and wherein said friction clutch is operably disposed between said first and second outputs of said interaxle differential. 15. A power transmission device for transferring drive torque from a rotary input member to a rotary output member, comprising: a friction clutch having a clutch pack operably disposed between the input and output members, and an apply plate moveable between a first position whereat a minimum clutch engagement force is exerted on said clutch pack and a second position whereat a maximum clutch engagement force is exerted on said clutch pack; a clutch actuator including an electric motor, a drive gear driven by said electric motor, first and second face gears meshed with said drive gear for rotation in opposite directions in response to rotation of said drive gear, and a clutch operator for moving said apply plate between its first and second positions in response to relative rotation between said first and second face gears; and a control system for actuating said electric motor so as to control rotary movement of said first face gear relative to said second face gear between a first position and a second position, wherein said apply plate is located in its first position when said first face gear is in its first position and said apply plate is located in its second position when said first face gear is rotated to its second position. 16. The power transmission device of claim 15 wherein said apply plate is fixed for rotation with said first face gear, and wherein said clutch operator includes a reaction plate fixed for rotation with said second face gear and a cam arrangement disposed between said apply plate and said reaction plate that is operable to cause axial movement of said apply plate between its first and second positions in response to relative rotation between said first and second face gears. 17. The power transmission device of claim 15 wherein said first face gear includes a first hub segment rotatably supported on the input member and a first ring segment having first gear teeth formed on a first face surface, wherein said second face gear includes a second hub segment rotatably supported on said first hub segment and a second ring segment having second gear teeth formed on a second face surface, and wherein said drive gear is meshed with said first and second gear teeth. 18. The power transmission device of claim 17 wherein said drive gear is fixed to a shaft driven by said electric motor with said drive gear located between said first and second face surfaces of said first and second face gears, respectively. 19. The power transmission device of claim 15 wherein the input member provides drive torque to a first driveline of a motor vehicle, wherein the output member is coupled to a second driveline of the motor vehicle, and wherein said torque transfer mechanism is operable to transfer drive torque from the input member to the output member. 20. The power transmission device of claim 19 defining a transfer case wherein the input member is a first shaft driving the first driveline and the output member is a second shaft coupled to the second driveline, wherein location of said apply plate in its first position releases engagement of said friction clutch so as to define a two-wheel drive mode and location of said apply plate in its second position fully engages said friction clutch so as to define a part-time four-wheel drive mode, and wherein said control system is operable to control activation of said electric motor for varying the position of said apply plate between its first and second positions to controllably vary the drive torque transferred from said first shaft to said second shaft so as to define an on-demand four-wheel drive mode. 21. The power transmission device of claim 20 wherein said control system includes a controller for receiving input signals from a sensor and generating electric control signals based on said input signals which are supplied to said electric motor for controlling the direction and amount of rotary movement of said drive gear. 22. The power transmission device of claim 20 defining a power take-off unit wherein the input member provides drive torque to a first differential associated with the first driveline, and wherein the output member is coupled to a second differential associated with the second driveline. 23. The power transmission device of claim 15 wherein the input member is a propshaft driven by a drivetrain of a motor vehicle and the output member is a pinion shaft driving a differential associated with an axle assembly of the motor vehicle, and wherein said friction clutch is disposed between said propshaft and said pinion shaft such that actuation of said clutch actuator is operable to transfer drive torque from said propshaft to said pinion shaft. 24. The power transmission device of claim 15 wherein the input member includes a first differential supplying drive torque to a pair of first wheels in a motor vehicle and a transfer shaft driven by said differential, wherein the output member includes a propshaft coupled to a second differential interconnecting a pair of second wheels in the motor vehicle, and wherein said friction clutch is disposed between said transfer shaft and said propshaft. 25. The power transmission device of claim 15 wherein the input member includes a first shaft supplying drive torque to a second shaft which is coupled to a first differential for driving a pair of first wheels in a motor vehicle, wherein the output member is a third shaft driving a second differential interconnecting a pair of second wheels of the motor vehicle, and wherein said friction clutch is operably disposed between said first and third shafts. 26. The power transmission device of claim 15 further including an interaxle differential driven by the input member and having a first output driving a first driveline in a motor vehicle and a second output driving a second driveline in the motor vehicle, and wherein said friction clutch is operably disposed between said first and second outputs of said interaxle differential. 27. A power transmission device, comprising: a torque coupling having a friction clutch operably disposed between first and second rotary members; a clutch actuator for engaging said friction clutch and including a geared drive unit and an electric motor driving a drive gear, said geared drive unit including a first drive component having a first ring segment and a second drive component having a second ring segment, said first ring segment having a first face surface with first gear teeth formed thereon and said second ring segment having a second face surface with second gear teeth formed thereon, said first gear teeth are aligned in facing relationship with said second gear teeth such that said drive gear is disposed between said first and second ring segments so as to be in meshed engagement with both of said first and second gear teeth; and a control system for actuating said electric motor to control the direction and amount of rotation of said drive gear so as to vary the magnitude of a clutch engagement force applied to said friction clutch in response to relative rotation between said first and second drive components. 28. The power transmission device of claim 27 wherein said clutch actuator includes an apply plate that is axially moveable between first and second positions in response to rotation of said first drive component relative to said second drive component, said apply plate is operable in its first position to exert a minimum clutch engagement force on said friction clutch and is further operable in its second position to exert a maximum clutch engagement face on said friction clutch. 29. The power transmission device of claim 28 wherein said apply plate is fixed for rotation with said first drive component, and wherein said clutch actuator further includes a reaction plate fixed for rotation with said second drive component and a cam arrangement disposed between said apply plate and said reaction plate that is operable to cause axial movement of said apply plate between its first and second positions in response to relative rotation between said first and second drive components. 30. The power transmission device of claim 27 wherein said first drive component is rotatable relative to said second drive component between a first position and a second position in response to activation of said electric motor for causing corresponding axial movement of an apply plate between a retracted position and an extended position relative to said friction clutch, said apply plate exerting a minimum clutch engagement force on said friction clutch when located in its retracted position and exerting a maximum clutch engagement force on said friction clutch when located in its extended position. 31. The power transmission device of claim 30 wherein said first rotary member provides drive torque to a first driveline of a motor vehicle, wherein said second rotary member is coupled to a second driveline of the motor vehicle, and wherein said torque coupling is operable to transfer drive torque from said first rotary member to said second rotary member. 32. The power transmission device of claim 31 defining a transfer case wherein said first rotary member is a first shaft driving the first driveline and said second rotary member is a second shaft coupled to the second driveline, wherein location of said apply plate in its retracted position releases engagement of said friction clutch so as to define a two-wheel drive mode and location of said apply plate in its extended position fully engages said friction clutch so as to define a part-time four-wheel drive mode, and wherein said control system is operable to control activation of said electric motor for varying the position of said apply plate between its retracted and extended positions to controllably vary the drive torque transferred from said first shaft to said second shaft so as to define an on-demand four-wheel drive mode. 33. The power transmission device of claim 31 defining a power take-off unit wherein said first rotary member provides drive torque to a first differential associated with the first driveline, and wherein said second rotary member is coupled to a second differential associated with the second driveline. 34. The power transmission device of claim 27 wherein said first rotary member is a propshaft driven by a drivetrain of a motor vehicle and said second rotary member is a pinion shaft driving a differential associated with an axle assembly of the motor vehicle, and wherein said friction clutch is disposed between said propshaft and said pinion shaft such that actuation of said clutch actuator is operable to transfer drive torque from said propshaft to said pinion shaft. 35. The power transmission device of claim 27 wherein said first rotary member includes a first differential supplying drive torque to a pair of first wheels in a motor vehicle and a transfer shaft driven by said differential, wherein said second rotary member includes a propshaft coupled to a second differential interconnecting a pair of second wheels in the motor vehicle, and wherein said friction clutch is disposed between said transfer shaft and said propshaft. 36. The power transmission device of claim 27 wherein said first rotary member includes a first shaft supplying drive torque to a second shaft which is coupled to a first differential for driving a pair of first wheels in a motor vehicle, wherein said second rotary member is a third shaft driving a second differential interconnecting a pair of second wheels of the motor vehicle, and wherein said friction clutch is operably disposed between said first and third shafts. 37. The power transmission device of claim 27 further including an interaxle differential driven by said first rotary member and having a first output driving a first driveline in a motor vehicle and a second output driving a second driveline in the motor vehicle, and wherein said friction clutch is operably disposed between said first and second outputs of said interaxle differential.
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이 특허에 인용된 특허 (33)
Baxter, Jr., Ralph W.; Sommer, Randy L.; Hunt, William G., Active differential assembly.
Dick Wesley M. (Fort Wayne IN) Reuter David C. (Saline MI) Dick Joseph A. (Fort Wayne IN), Clutch actuating device for use in a vehicle drivetrain subassembly.
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) Divecha Neville K. (Camillus NY) Winks Joseph A. (West Monroe NY), Rotary actuation mechanism for torque modulated transfer case.
Bansbach, Eric A.; Mueller, Joseph G.; Brissenden, James; Zalewski, John D.; Mohan, Sankar K.; Mizon, Richard; Ronk, Aaron; Mozaffar, Khazaee, Torque transfer clutch with linear piston hydraulic clutch actuator.
Mastie, Joseph D.; Pritchard, Larry A.; Young, David; Niffenegger, Donn; Kurmaniak, Christopher, Electro-mechanical transfer case with range shift on the move.
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