Recherche dans les collections de brevets nationales et internationales
Une partie du contenu de cette demande n'est pas disponible pour le moment.
Si cette situation persiste, contactez-nous auObservations et contact
1. (WO2008062192) SYSTÈME DE TRANSMISSION
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

Claims

1. A transmission system including a first shaft, a first gear element rotatably mounted on the shaft, a selector assembly arranged to selectively lock the first gear element for rotation with the first shaft and a damping system arranged to damp the locking of the first gear element with the first shaft.

2. A transmission system according to claim 1, wherein the damping system is arranged to allow lost motion between the first gear element and the selector assembly when the first gear element is locked for rotation with the first shaft by the selector assembly.

3. A transmission system according to claim 2, wherein the selector assembly is arranged to drivingly engage the first gear element and the damping system is arranged to allow relative rotation between the first gear element and the selector assembly when the first gear element is drivingly engaged by the selector assembly.

4. A transmission system according to claim 2 or 3, wherein the damping system is arranged to limit the extent of lost motion between the first gear element and the selector assembly when the first gear element is drivingly engaged by the selector assembly.

5. A transmission system according to any one of claims 2 to 4, wherein the damping system includes means for opposing lost motion between the first gear element and the selector assembly.

6. A transmission system according to claim 5, wherein the means for opposing lost motion between the first gear element and the selector assembly includes resilient means.

7. A transmission system according to claim 5 or 6, wherein the means for opposing lost motion between the first gear element and the selector assembly includes stiffening members.

8. A transmission system according to any one of the preceding claims, wherein the damping system is arranged to allow lost motion between the first shaft and at least one of the first gear element and the selector assembly after the selector assembly engages the first gear element.

9. A transmission system according to any one of the preceding claims, wherein the first gear element and/or the selector assembly includes the damping system.

10. A transmission system according to claim 9, wherein the first gear element includes first and second parts that are arranged for relative rotational movement.

11. A transmission system according to claim 10, wherein the first part is rotatably mounted on the first shaft and the second part is arranged for limited rotational movement relative to the first part.

12. A transmission system according to claim 10 or 11, wherein the first part includes drive formations that can be selectively engaged by the selector assembly to drive the gear element.

13. A transmission system according to any one of claims 10 to 12, wherein the second part includes gear meshing means for meshing with other gear elements.

14. A transmission system according to any one of claims 9 to 13, wherein the gear selector assembly includes first and second parts that are arranged for relative rotational movement.

15. A transmission system according to claim 14, wherein the first part is fixed for rotation with the first shaft and the second part is arranged for limited rotational movement relative to the first part.

16. A transmission system according to claim 14 or 15, wherein the second part includes engagement members for selectively engaging drive formations formed on the first gear element.

17. A transmission system according to any one of claims 10 to 16, wherein the first gear element and/or the selector assembly includes means for opposing relative rotational movement between the first and second parts thereof.

18. A transmission system according to any one of the preceding claims, wherein the damping system includes a clutch device for damping the locking of the first gear element with the first shaft.

19. A transmission system according to claim 18, wherein the clutch device is arranged to slip when the selector assembly locks the first gear element for rotation with the first shaft.

20. A transmission system according to claim 19, including means for adjusting the clutch device pressure according to the relative rotational positions of the first gear element and the selector assembly.

21. A transmission system according to any one of the preceding claims, wherein the damping system includes a cam assembly for damping the locking of the first gear element with the first shaft.

22. A transmission system according to claim 21, wherein the cam assembly includes a first cam member that is fixed for rotation with one of a first and second parts of the gear element or selector assembly and a second cam member that is fixed for rotation with the other part of the gear element or selector assembly, wherein the cam assembly is arranged to damp the locking of the first gear element with the first shaft by the interaction of the first and second cam members.

23. A transmission system according to claim 22, wherein the first cam member is arranged for limited axial movement with respect to the second cam member.

24. A transmission system according to claim 23, including resilient means arranged to oppose increased separation between the first and second cam members.

25. A transmission system according to any one of the preceding claims, wherein the damping system is a fluid damping system, and preferably a hydraulic damping system.

26. A transmission system according to claim 25, wherein the fluid damping system includes a positive displacement pump device for damping the locking of the first gear element for rotation with the first shaft.

27. A transmission system according to claim 25, wherein the fluid damping system includes at least one piston device that is arranged to damp the locking of the first gear element for rotation with the first shaft.

28. A transmission system according to claim 27, including first and second piston devices, wherein the first piston is arranged to damp locking of the first gear element for rotation with the first shaft in a clockwise direction and a second piston arranged to damp locking of the first gear element for rotation with the first shaft in an anticlockwise direction.

29. A transmission system according to claim 27 or 28, wherein the or each piston device includes a piston member and a piston chamber, and the fluid damping system includes means for enabling damping fluid to bypass or pass thorough the or each piston member as it compresses the damping fluid within the piston chamber.

30. A transmission system according to any one of the preceding claims, wherein the damping system includes a blocking system for damping the locking of the first gear element for rotation with the first shaft.

31. A transmission system according to claim 30, wherein the blocking system includes first and second blocking members arranged to interact to limit the relative rotational movement between the first and second parts of the gear element or selector assembly and which include means for controlling the rate of damping.

32. A transmission system according to any one of the preceding claims, wherein the transmission system in an instantaneous transmission system.

33. A transmission system according to any one of the preceding claims, wherein the selector assembly is arranged to selectively lock the first gear element for rotation with the first shaft from the following operational modes: lock the first gear element for rotation with the first shaft in the clockwise and anti-clockwise directions; lock the first gear element for rotation with the first shaft in a clockwise direction and unlocked in an anti-clockwise direction; lock the first gear element for rotation with the first shaft in the anti-clockwise direction and unlocked in the clockwise direction.

34. A transmission system according to claim 33, wherein the gear selector assembly is arranged to select the following operational mode with respect to the first gear element: the first gear element is not locked for rotation with the first shaft in the clockwise or anticlockwise directions.

35. A transmission system according to any one of the preceding claims, including a second gear element rotatably mounted on the first shaft, wherein the selector assembly is arranged to selectively lock the second gear element for rotation with the first shaft from the following operational modes: lock the second gear element for rotation with the first shaft in the clockwise and anti-clockwise directions; lock the second gear element for rotation with the first shaft in a clockwise direction and unlocked in an anti-clockwise direction; lock the second gear element for rotation with the first shaft in the anti-clockwise direction and unlocked in the clockwise direction.

36. A transmission system according to claim 35, wherein the selector assembly can be arranged to select the following operational mode with respect to the second gear element: the second gear element is not locked for rotation with the first shaft in the clockwise or anticlockwise directions.

37. A transmission system according to claim 35 or 36, wherein the second gear element includes a damping system for damping the locking of the second gear element for rotation with the first shaft.

38. A transmission system according to claim 37, wherein the selector assembly is arranged such that when a driving force is transmitted, one of the first and second sets of engagement members drivingly engages the engaged gear element, and the other set of engagement members is then in an unloaded condition, and the unloaded gear set is moveable to engage the new gear element.

39. A transmission system according to claim 37 or 38, wherein the or each selector assembly can be arranged such that when a braking force is transmitted the first set of engagement members drivingly engages the engaged gear element, and the second set of engagement members is in an unloaded condition, and when a driving force is transmitted the second set of engagement members drivingly engages the engaged gear element, and the second set of engagement members is then in an unloaded condition.

40. A gear element for a transmission system including first and second parts that are arranged to rotate relative to each other and a damping system for damping the relative rotational movement.

41. A gear element according to claim 40, wherein one of the first and second parts includes engagement formations arranged for engagement by a gear selector assembly and the other part is includes means for engaging another gear element.

42. A gear element according to claim 40 or 41, wherein at least one of the first and second parts is substantially annular, or includes a substantially annular part.

43. A gear element according to any one of claims 40 to 42, wherein the first and second parts are arranged co-axially.

44. A gear element according to any one of claims 40 to 43, wherein the damping system includes at least one of the following for limiting the angle of relative rotational movement achievable between the first and second parts: blocking means; resilient means; a clutch device; a cam assembly; and a fluid damping system, preferably a hydraulic damping system.

45. A gear selector assembly for a transmission system that is arranged to selectively lock a gear element for rotation with a shaft from the following operational modes: lock the gear element for rotation with the shaft in the clockwise and anti-clockwise directions; lock the gear element for rotation with the shaft in a clockwise direction and unlocked in an anti-clockwise direction; lock the gear element for rotation with the shaft in the anti-clockwise direction and unlocked in the clockwise direction, wherein the selector assembly includes a damping system that is arranged to damp locking of the gear element for rotation with the shaft.

46. A gear selector assembly according to claim 45, including first and second parts that are arranged for relative rotational movement and first and second sets of engagement members that are arranged to move independently of each other to selectively engage the gear element, wherein the first part is arranged for mounting on the shaft and the second part supports the first and second sets of engagement members.

47. A gear selector assembly according to claim 46, wherein the first and second sets of engagement members can move axially along the second part.