The invention relates to a system for motorizing a wheel (2), the system comprising a motor unit (4), a drive member (6) secured to the wheel (2) and a clutch device (7) connects the output shaft (8) of the motor unit (4) to the drive member (6). According to the invention, the motor unit (4) compri
The invention relates to a system for motorizing a wheel (2), the system comprising a motor unit (4), a drive member (6) secured to the wheel (2) and a clutch device (7) connects the output shaft (8) of the motor unit (4) to the drive member (6). According to the invention, the motor unit (4) comprises an electric motor (11) and is carried by an un-sprung part of a suspension strut (3) of an aircraft so that the latter can be made to move along the ground.
대표청구항▼
1. Motorizing system for powering a wheel associated with a suspension of an aircraft so that the aircraft can be moved around on ground, the motorized system comprising: a motor unit;a drive member secured to the wheel; anda clutch device connecting an output shaft of the motor unit to the drive me
1. Motorizing system for powering a wheel associated with a suspension of an aircraft so that the aircraft can be moved around on ground, the motorized system comprising: a motor unit;a drive member secured to the wheel; anda clutch device connecting an output shaft of the motor unit to the drive member,wherein the motor unit includes an electric motor and is movably carried by an unsprung part of a suspension strut, such that the motor unit is selectively movable relative to the drive member, andwherein a positive transmission occurs between the output shaft and the drive member. 2. Motorizing system for powering a wheel according to claim 1, wherein the motor unit is carried by an axle crossmember of the wheel. 3. Motorizing system according to one of claims 1 and 2, wherein the motor unit comprises a reduction system connecting the output shaft of the motor to the drive member. 4. Motorizing system according to claim 3, wherein the reduction system is secured to the electric motor. 5. Motorizing system according to claim 1, wherein the clutch device is configured in such a way as to be able to move the motor unit into an engaged position in which the motor unit is connected to the drive member, and a disengaged position in which the motor unit is separated from the drive member. 6. Motorizing system according to claim 5, wherein the clutch device is configured in such a way that the motor unit is mounted to pivot about a horizontal pivot axis with respect to an axle crossmember of the wheel. 7. Motorizing system according to claim 5 or 6, wherien the clutch device is configured in such a way that the motor unit is mounted to pivot about a substantially vertical pivot axis with respect to an axle crossmember of the wheel. 8. Motorizing system according to claim 1, wherein the clutch device comprises a movement system that enables the motor unit to be moved to and from an engaged position and a disengaged position. 9. Motorizing system according to claim 8, wherein the movement system is designed to apply to the motor unit a force higher than a limit value necessary for the motor unit to remain in the engaged position. 10. Motorizing system according to claim 8 or 9, wherein the movement system is designed to disengage the motor unit by application of a mechanical force higher than a predetermined value applied to the output shaft of the motor unit by the drive member. 11. Motorizing system according to claim 8 or 9, wherein the movement system comprises a driving element. 12. Motorizing system according to claim 11, wherein the driving element is formed of an actuating jack. 13. Motorizing system according to claim 12, wherein one end of the actuating jack is mounted for rotation on a fixing piece secured to an axle crossmember of the wheel, and another end of the actuating jack is mounted for rotation on two links, a first one of the two links being mounted for rotation on the fixing piece, and a second one of the two links being mounted for rotation on the motor unit. 14. Motorizing system according to claim 11, wherein the motor unit is arranged in such a way as to be naturally driven into the disengaged position under its own weight. 15. Motorizing system according to claim 1, wherein the clutch device comprises a guided link defining a disengaged position of the motor unit. 16. Motorizing system according to claim 15, wherein the guided link comprises a rod, the rod being mounted for rotation on a fixing piece secured to an axle crossmember of the wheel, and the rod being mounted for sliding with respect to a pivot carried by the motor unit. 17. Motorizing system according to claim 16, wherein a shock-absorbing unit, which is able to absorb shocks of the motor unit, is arranged between the pivot and a free end of the rod. 18. Motorizing system according to claim 17, wherein the shock-absorbing unit includes a fixed end stop fixed to the free end of the rod, a moving end stop mounted to slide along the rod between the free end of the rod and the pivot, and an elastic member arranged between the fixed end stop and the moving end stop in such a way that the elastic member is preloaded between the fixed end stop and the moving end stop when the motor unit is not in the disengaged position. 19. Motorizing system according to claim 1, wherein the drive member is an ring gear carried by a rim of the wheel and designed to enter into a meshed position with an output gear of the motor unit when the motor unit is in an engaged position. 20. Motorizing system according to claim 19, wherein the meshed position of the output gear is defined by two rolling lips carried by the ring gear and designed to have, rolling along the rolling lips without sliding, two runway tracks carried by the output gear. 21. Motorizing system according to claim 20, wherein the rolling lips and the runway tracks have a cylindrical bearing surface. 22. Motorizing system according to any one of claims 19 to 21, wherein the output gear is connected to the motor unit by a constant-velocity joint operating under a radial load. 23. Motorizing system according to claim 1, wherein the motorizing system is one of two motorizing systems of an assembly,wherein the wheel is one of two wheels associated with the assembly,wherein the assembly includes the motor unit and a second motor unit, the two motor units are of the assembly being secured to one another and being fixed to the unsprung part of the suspension strut, andwherein the suspension strut is common to the two wheels. 24. Motorizing system according to claim 23, wherein the two motor units are arranged between the two wheels. 25. Motorizing system according to claim 24, wherein the two motor units are arranged behind the suspension strut, which carries an axle crossmember of the two wheels. 26. Motorizing system according to claim 23, wherein each motorizing system of the assembly includes a shock-absorbing unit, which is able to absorb shocks of the motor unit, the shock-absorbing unit being arranged between a pivot carried by the motor unit and a free end of a rod of a guided link of the clutch device, the clutch device being configured in such a way that the motor unit is mounted to pivot about a horizontal pivot axis with respect to an axle crossmember of the wheel. 27. Motorizing system according to claim 23, wherein the assembly includes the output gear and the drive member, which mesh with each other at substantially a same height as that of an axis of the two wheels, andwherein the assembly includes a second output gear and a second drive member, which mesh with each other at substantially the same height as that of the axis of the two wheels.
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이 특허에 인용된 특허 (3)
Jenny Robert William (Bellevue WA), Aircraft wheel drive apparatus and method.
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