IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0436496
(2003-05-07)
|
우선권정보 |
DE-0055143 (2000-11-07); GB-0017563 (2001-07-19); GB-0017564 (2001-07-19) |
발명자
/ 주소 |
- Mills, John
- Boll, Bernhard
- Huseby, Geir
- Hirt, Gunter
- Norum, Viggo
- Oyen, Jan
- Lein, Lars
- Barnes, Nigel
- Ronne, Simen
|
출원인 / 주소 |
- LuK Lamellen und Kupplungsbau Beteiligungs KG
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
12 인용 특허 :
3 |
초록
▼
An actuator for a motor vehicle transmission has a shift cylinder performing rotary actuating movements. An electric motor is arranged inside the shift cylinder and drives the latter either through a harmonic drive mechanism or a planetary drive mechanism. The arrangement provides a high reduction r
An actuator for a motor vehicle transmission has a shift cylinder performing rotary actuating movements. An electric motor is arranged inside the shift cylinder and drives the latter either through a harmonic drive mechanism or a planetary drive mechanism. The arrangement provides a high reduction ratio and an efficient use of limited space.
대표청구항
▼
1. A transmission comprising a transmission actuator device with a shift cylinder and a motor arranged to drive the shift cylinder, wherein the shift cylinder has an outer circumference operatively engaged with shifter elements of the transmission, wherein further the shift cylinder is rotatably sup
1. A transmission comprising a transmission actuator device with a shift cylinder and a motor arranged to drive the shift cylinder, wherein the shift cylinder has an outer circumference operatively engaged with shifter elements of the transmission, wherein further the shift cylinder is rotatably supported so that a rotary movement of the shift cylinder causes different transmission ratios to be engaged and disengaged, and wherein the shift cylinder has a recess and at least a part of the motor is received inside the recess.2. The transmission of claim 1, wherein the motor comprises an electric motor.3. The transmission of claim 1, further comprising a transmission housing, wherein the motor comprises a motor housing arranged on the transmission housing and constrained from rotating relative to the transmission housing.4. The transmission of claim 1, further comprising a reduction gearbox interposed between the motor and the shift cylinder, wherein the motor drives the shift cylinder through the reduction gearbox.5. The transmission of claim 4, wherein further at least a part of the reduction gearbox is received inside the recess.6. An actuator for controlling an actuating mechanism of a motor vehicle transmission, said actuator comprising a fastening element for mounting the actuator on a carrier element; a shift cylinder arranged to perform rotary movements relative to the fastening element; and an electric motor arranged coaxially inside the shift cylinder, said electric motor having a stator arranged non-rotatably relative to the fastening element, and said electric motor further having a rotor operatively connected to the shift cylinder through a harmonic drive mechanism, wherein the harmonic drive mechanism comprises: a wave generator coupled to the rotor to rotate together with the rotor; a stationary ring-shaped spline gear concentric to the wave generator and non-rotatable relative to the fastening element; and a flexible spline gear arranged between the wave generator and the stationary ring-shaped spline gear, wherein the flexible spline gear is coupled to the shift cylinder to drive the rotary movements of the shift cylinder, wherein the flexible spline gear has fewer teeth than the stationary ring-shaped spline gear, and wherein the wave generator has a contour shaped so that the flexible spline gear and the stationary ring-shaped spline gear mesh with each other at revolving locations of engagement, but are separated from each other in angular sectors between said locations of engagement.7. The actuator of claim 6, wherein the harmonic drive mechanism has a reduction ratio between ?40:1 and ?60:1.8. The actuator of claim 6, wherein said contour is shaped as an ellipse with a major axis and wherein the revolving locations of engagement are at diametrically opposite places on the major axis.9. The actuator of claim 6, wherein the flexible spline gear is cup-shaped, comprising a ring-shaped portion carrying external spline teeth, a hub portion, and a flexible transition portion connecting the ring-shaped portion to the hub portion, and wherein the hub portion is connected to the shift cylinder.10. The actuator of claim 9, wherein the hub portion is connected to the shift cylinder by means of screws.11. The actuator of claim 9, wherein the hub portion is connected elastically to the shift cylinder.12. The actuator of claim 9, wherein the hub portion is connected to the shift cylinder through an elastic bushing, said elastic bushing being compressively fitted between mutually facing circumferences of the hub portion and the shift cylinder.13. The actuator of claim 6, further comprising a cylindrical motor housing, wherein the electric motor is arranged inside said motor housing, wherein the ring-shaped spline gear is configured as a part of the motor housing and the shift cylinder is rotatably supported on an external circumference of the motor housing.14. The actuator of clam 6, comprising two shift cylinders arranged in-line on a central shaft.15. The actuator of claim 14, wherein the central shaft has an axial groove.16. The actuator of claim 14, wherein the stator is mounted on the central shaft and the rotor is arranged surrounding the stator.17. The actuator of claim 6, wherein the actuator is adapted for installation inside a transmission housing.18. An actuator for actuating one of a clutch-actuating mechanism, a gear-shifting mechanism, and a brake of a motor vehicle, said actuator comprising an electric motor with a rotor shaft, and further comprising a gear-drive mechanism with a sun gear rotationally coupled to the rotor shaft, a ring-shaped planet carrier arranged to revolve coaxially around the rotor shaft, and a set of planet gears arranged symmetrically at angular intervals on the planet carrier; wherein the planet gears mesh with two internally toothed ring gears, one of said ring gears being stationary while the other of said ring gears is connected to a rotary output element coaxial to the rotor shaft, wherein the two ring gears differ in their respective number of teeth, and wherein the gear-drive mechanism has a reduction ratio dependent on said difference in the number of teeth, wherein the rotary output element comprises a shift cylinder adapted for controlling a gear-shifting mechanism.19. The actuator of claim 18, further comprising a cylindrical motor housing, wherein the electric motor is arranged inside said motor housing, the stationary ring gear is configured as a part of the motor housing, the shift cylinder is rotatably supported on an external circumference of the motor housing and the other of the two ring gears is connected to an internal circumference of the shift cylinder.20. The actuator of claim 19, wherein the other of the two ring gears is elastically connected to the internal circumference of the shift cylinder.21. The actuator of claim 20, wherein an elastomeric bushing is compressively fitted between an external circumference of said other of the two ring gears and the internal circumference of the shift cylinder.22. The actuator of claim 19, further comprising seals between the external circumference of the motor housing and the internal circumference of the shift cylinder.23. The actuator of claim 19, comprising two shift cylinders arranged coaxially in-line.24. The actuator of claim 23, wherein one of the shift cylinders comprises a recess and the other of the shift cylinders comprises an axle peg engaged in said recess.25. The actuator of claim 24, comprising an axial thrust bearing between the shift cylinders.26. The actuator of claim 25, comprising elastic biasing means exerting an axial biasing force on the axial thrust bearing.27. The actuator of claim 23, wherein the two shift cylinders are mounted on a central shaft.28. The actuator of claim 27, wherein the central shaft has an axial groove.29. The actuator of claim 27, wherein the electric motor in each shift cylinder has a stator mounted on the central shaft and a rotor surrounding the stator.30. The actuator of claim 19, wherein the actuator is adapted for installation inside a transmission housing.31. An actuator for actuating one of a clutch-actuating mechanism, a gear-shifting mechanism, and a brake of a motor vehicle, said actuator comprising an electric motor with a rotor shaft, and further comprising a gear-drive mechanism with a sun gear rotationally coupled to the rotor shaft, a ring-shaped planet carrier arranged to revolve coaxially around the rotor shaft, and a set of planet gears arranged symmetrically at angular intervals on the planet carrier; wherein the planet gears mesh with two internally toothed ring gears, one of said ring gears being stationary while the other of said ring gears is connected to a rotary output element coaxial to the rotor shaft, wherein the two ring gears differ in their respective number of teeth, and wherein the gear-drive mechanism has a reduction ratio dependent on said difference in the number of teeth, wherein the actuator includes a spindle element, with the rotary output element driving the spindle element.32. The actuator of claim 31, wherein the spindle element comprises a revolving ball spindle element with an externally threaded part, an internally threaded part, and a set of roller balls interposed between said threaded parts, wherein one of the threaded parts is connected to the rotary output element while the other of the threaded parts is axially movable but constrained from rotating with the rotary output element.33. The actuator of claim 32, comprising a compensator spring between said threaded parts.34. An actuator for actuating one of a clutch-actuating mechanism, a gear-shifting mechanism, and a brake of a motor vehicle, said actuator comprising an electric motor with a rotor shaft, and further comprising a gear-drive mechanism with a sun sear rotationally coupled to the rotor shaft, a ring-shaped planet carrier arranged to revolve coaxially around the rotor shaft, and a set of planet gears arranged symmetrically at angular intervals on the planet carrier; wherein the planet gears mesh with two internally toothed ring gears, one of said ring gears being stationary while the other of said ring gears is connected to a rotary output element coaxial to the rotor shaft, wherein the two ring gears differ in their respective number of teeth, and wherein the gear-drive mechanism has a reduction ratio dependent on said difference in the number of teeth, wherein the actuator includes a gear rack, with the rotary output element driving the gear rack.35. The actuator of claim 34, further comprising a pinion connected to the rotary output element, wherein the gear rack runs transverse to a rotary axis of the pinion and the pinion meshes with the gear rack.
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