Continuously variable transmission

• US 6,640,659 B1
• Filed: 07/30/2001
• Issued: 11/04/2003
• Est. Priority Date: 01/28/1999
• Status: Expired due to Term

• Current Assignee: Gyro Holding Limited
• Original Assignee: GYRO Holdings Limited
• Inventors: Jegatheeson, Muthvetpillai
• Primary Examiner(s): Bonck, Rodney H.
• Assistant Examiner(s): Le, David D.
• Application Number:
  US09/890,349
• Time in Patent Office: 827 Days
• Field of Search: 74/52.2, 74/5.R, 74/64, 741/11--69, 192/48.92, 475/336, 475/343, 475/231, 475/268
• US Class Current: 74/5.22
• CPC Class Codes: F16H 33/10 with gyroscopic action, e.g. comprising wobble-plates, oblique cranks
• CPC Class Codes: Y10T 74/12 Gyroscopes
• CPC Class Codes: Y10T 74/1218 Combined

Abstract

A transmission is provided which includes a fixed housing or support, an input part moveable relative to the support and a torque shaft, a first one-way clutch between the torque shaft and the driven shaft, linkage elements rotatable about the axis of rotation of the driven shaft under the influence of the input parts and an inertial body mounted on the linkage elements to be cyclically angularly deflected in response to the input part, the reaction forces generated by the inertial body as it cyclically deflected being applied to the torque shaft as a positive and negative torque and the torque shaft being connected over a second one-way clutch opposite to the first one-way clutch either to the support or to the driven shaft over a rotation reversal system whereby the driven shaft can be rotated by the torque shaft in one sense of rotation only.

Claims

1. A transmission comprising:

a fixed support;

an input member reciprocable along a first axis relative to said fixed support;

a linkage arrangement rotatable about said first axis under the influence of said input member, said linkage arrangement including a torque shaft;

an output member structured and arranged to be rotated about a second axis by the torque shaft;

a first one-way clutch between the torque shaft and the output member; and

a gyroscopic rotor mounted on the linkage arrangement and having a spin axis which is cyclically angularly deflected in response to the input member to generate gyroscopic reaction forces, the reaction forces generated by the rotor as said spin axis is cyclically deflected being applied to the torque shaft as positive and negative torque;

wherein the first one-way clutch is structured and arranged to apply the positive torque to the output member;

wherein the torque shaft is connected over a second one-way clutch opposite to the first one-way clutch to said fixed support to apply the negative torque to said fixed support; and

wherein the output member can be rotated by the torque shaft in one direction only.

2. The transmission as claimed in claim 1, wherein the output member is a body rotatable about the fixed support, the input member is a drive shaft reciprocable toward and away from said fixed support, the linkage comprises an elbow linkage pivotally connected at one end to the drive shaft and an another end to a frame rotatable with said body, the torque shaft being connected over said second one-way clutch with said fixed support and over said first one-way clutch with the frame.

3. The transmission as claimed in claim 1, wherein the rotor is rotatable about the spin axis with a speed of rotation that is independently variable relative to an input motion to alter the magnitude of reaction forces and thereby the torque being transmitted to the output member.

4. The transmission as claimed in claim 1, wherein the first and second axes are substantially parallel or coincident.

5. The transmission as claimed in claim 1, wherein the gyroscopic rotor is arranged on the linkage arrangement so that said spin axis is angularly deflected in one of a plane containing and parallel with the axis of the input member as the input member reciprocates.

6. The transmission as claimed in claim 5, wherein the linkage arrangement further comprises an elbow linkage pivotally connected at one end to the input member and at another end being immovable relative to the output member along the second axis, the gyroscopic rotor being mounted on one arm of the elbow linkage so that said spin axis can be angularly deflected as the input member reciprocates.

7. The transmission as claimed in claim 1, including a rotatable input shaft connected to the input member via a connecting system to impart reciprocating motion to the input member, wherein the input shaft is additionally coupled to the output member via a further shaft coupled to a third one-way clutch having a gear mounted thereon which is rotatable with a speed of rotation, the input shaft being driven by the output member when the speed of rotation of the gear exceeds that of the further shaft, otherwise, the third one-way clutch is freewheeling.

8. The transmission as claimed in claim 7, wherein the third one-way clutch is coupled to the input shaft via a variable ratio gear system.

9. A transmission comprising:

a fixed support;

an input member reciprocable along a first axis relative to said fixed support;

a linkage arrangement rotatable about said first axis under the influence of said input member, said linkage arrangement including a torque shaft;

an output member structured and arranged to be rotated about a second axis by the torque shaft;

a first one-way clutch between the torque shaft and the output member; and

a gyroscopic rotor mounted on the linkage arrangement and having a spin axis which is cyclically angularly deflected in response to the input member to generate gyroscopic reaction forces, the reaction forces generated by the rotor as said spin axis is cyclically deflected being applied to the torque shaft as positive and negative torque;

wherein the first one-way clutch is structured and arranged to apply the positive torque to the output member;

wherein the torque shaft is connected over a second one-way clutch opposite to the first one-way clutch to the output member over a rotation reversal system to apply the negative torque to the output member as positive torque; and

wherein the output member can be rotated by the torque shaft in one direction only.

10. The transmission as claimed in claim 9, wherein the gyroscopic rotor is arranged on the linkage arrangement so that said spin axis is angularly deflected in one of a plane containing and parallel with the axis of the input member as the input member reciprocates.

11. The transmission as claimed in claim 9, wherein the linkage arrangement comprises an elbow linkage pivotally connected at one end to the input member and at another end being immovable relative to the output member along the second axis, the gyroscopic rotor being mounted on one arm of the elbow linkage so that said spin axis can be angularly deflected as the input member reciprocates.

12. The transmission as claimed in claim 9, wherein two meshing gears are interposed between the first one-way clutch and the output member and three meshing gears are interposed between the second one-way clutch and the output member such that whichever clutch is not freewheeling will drive the output member in the same sense of rotation.

13. The transmission as claimed in claim 9, wherein the output member is a body rotatable about a fixed support, the input member is a drive shaft reciprocable toward and away from said fixed support, the linkage comprises an elbow linkage pivotally connected at one end to the drive shaft and an another end to a frame rotatable with said body, the torque shaft being connected over said first one-way clutch with said fixed support and over said second one-way clutch with the frame.

14. The transmission as claimed in claim 9, wherein the rotor is rotatable about the spin axis with a speed of rotation that is independently variable relative to an input motion to alter a magnitude of the reaction forces and thereby the torque being transmitted to the output member.

15. The transmission as claimed in claim 9, wherein the first and second axes are substantially parallel or coincident.

16. The transmission as claimed in claim 9, including a rotatable input shaft connected to the input member via a connecting system to impart reciprocating motion to the input member, wherein the input shaft is additionally coupled to the output member via further shaft coupled to a third one-way clutch having a gear mounted thereon which is rotatable with a speed of rotation, the input shaft being driven by the output member when the speed of rotation of the gear exceeds that of the further shaft, otherwise, the third one-way clutch is freewheeling.

17. The transmission as claimed in claim 16, wherein the third one-way clutch is coupled to the input shaft via a variable ratio gear system.

18. A transmission comprising:

a fixed support;

a torque shaft;

an output member arranged to be rotated about a first axis of rotation by the torque shaft;

an input member reciprocable along a second axis;

a linkage arrangement rotatable about the second axis under the influence of said input member;

a first one-way clutch between the torque shaft and the output member; and

a gyroscopic rotor mounted on the linkage arrangement and having a spin axis which is cyclically angularly deflected in response to the input member to generate gyroscopic reaction forces, the reaction forces generated by the gyroscopic rotor as said spin axis is cyclically deflected being applied to the torque shaft as positive and negative torque;

said first one-way clutch being configured to apply the positive torque to the output member;

said torque shaft being connected over a second one-way clutch opposite to the first one-way clutch to said support to apply the negative torque to said support; and

wherein the output member is rotated by the torque shaft in one direction only.

19. The transmission as claimed in claim 18, wherein the linkage arrangement comprises:

an outer frame fixed relative to the torque shaft and rotatable relative to the input member about a first frame axis; and

an inner frame rotatable relative to the outer frame about a second frame axis perpendicular to the first frame axis, the gyroscopic rotor being mounted on the inner frame, and

wherein a rotation arrangement rotates the inner frame in response to reciprocation of the input member.

20. The transmission as claimed in claim 19, wherein the spin axis of the gyroscopic rotor is orthogonal to the second frame axis.

21. The transmission as claimed in claim 19, wherein the inner frame is connected to the input member by a connecting rod arrangement.

22. The transmission as claimed in claim 19, wherein the inner frame is connected to the input member by a rack-and-pinion arrangement.

23. The transmission as claimed in claim 18, wherein the input member comprises a drive shaft reciprocable along said first axis, the gyroscopic rotor being arranged on the linkage arrangement so that said spin axis is angularly deflected in one of a plane containing and parallel with the axis of the drive shaft as the drive shaft reciprocates.

24. The transmission as claimed in claim 18, wherein the gyroscopic rotor is rotatable about the spin axis with a speed of rotation that is independently variable relative to an input motion to alter a magnitude of the reaction forces and thereby the torque being transmitted to the output member.

25. The transmission as claimed in claim 18, wherein the first and second axes are substantially parallel or coincident.

26. The transmission as claimed in claim 19, wherein a gear arrangement is provided between the inner frame and the gyroscopic rotor so that an input motion also causes rotation of the gyroscopic rotor.

27. The transmission as claimed in claim 26, wherein the rotor is rotatable about the spin axis with a speed of rotation that is variable relative to an input motion to alter a magnitude of the reaction forces and thereby the torque being transmitted to the output member.

28. The transmission as claimed in claim 18, including a rotatable input shaft connected to the input member via a connecting system to impart reciprocating motion to the input member, wherein the input shaft is additionally coupled to the output member via a further shaft coupled to a third one-way clutch having a gear mounted thereon which is rotatable with a speed of rotation, the input shaft being driven by the output member when the speed of rotation of the gear exceeds that of the further shaft, otherwise, the third one-way clutch is freewheeling.

29. The transmission as claimed in claim 28, wherein the third one-way clutch is coupled to the input shaft via a variable ratio gear system.

30. A transmission comprising:

a fixed support;

a torque shaft;

an output member arranged to be rotated about a first axis of rotation by the torque shaft;

an input member reciprocable along a second axis;

a linkage arrangement rotatable about the second axis under the influence of said input member;

a first one-way clutch between the torque shaft and the output member; and

a gyroscopic rotor mounted on the linkage arrangement and having a spin axis which is cyclically angularly deflected in response to the input member to generate gyroscopic reaction forces, the reaction forces generated by the gyroscopic rotor as said spin axis is cyclically deflected being applied to the torque shaft as positive and negative torque;

said first one-way clutch being configured to apply the positive toque to the output member;

said torque shaft being connected over a second one-way clutch opposite to the first one-way clutch to the output member over a rotation reversal system to apply the negative toque to the output member as positive torque; and

wherein the output member is rotated by the torque shaft in one direction only.

31. The transmission as claimed in claim 30, wherein the input member comprises a drive shaft reciprocable along said first axis, the gyroscopic rotor being arranged on the linkage arrangement so that said spin axis is angularly deflected in one of a plane containing and parallel with the axis of the drive shaft as the drive shaft reciprocates.

32. The transmission as claimed in claim 30, wherein the gyroscopic rotor is rotatable about the spin axis with a speed of rotation that is independently variable relative to an input motion to alter a magnitude of the reaction forces and thereby the torque being transmitted to the output member.

33. The transmission as claimed in claim 30, wherein the first and second axes are substantially parallel or coincident.

34. The transmission as claimed in claim 30, wherein the linkage arrangement comprises:

an outer frame fixed relative to the torque shaft and rotatable relative to the drive shaft about a first frame axis; and

an inner frame rotatable relative to the outer frame about a second frame axis perpendicular to the first frame axis, the gyroscopic rotor being mounted on the inner frame, and

wherein a rotation arrangement rotates the inner frame in response to reciprocation of the drive shaft.

35. The transmission as claimed in claim 34, wherein the spin axis of the gyroscopic rotor is orthogonal to the second frame axis.

36. The transmission as claimed in claim 34, wherein the inner frame is connected to the input member by a connecting rod arrangement.

37. The transmission as claimed in claim 34, wherein the inner frame is connected, to the input member by a rack-and-pinion arrangement.

38. The transmission as claimed in claim 34, wherein a gear arrangement is provided between the inner frame and the gyroscopic rotor so that an input motion also causes rotation of the gyroscopic rotor.

39. The transmission as claimed in claim 38, wherein the rotor is rotatable about the spin axis with a speed of rotation that is variable relative to the input motion to vary a magnitude of the reaction forces and thereby the torque being transmitted to the output member.

40. The transmission as claimed in claim 30, including a rotatable input shaft connected to the input member via a connecting system to impart reciprocating motion to the input member, wherein the input shaft is additionally coupled to the output member via a further shaft coupled to a third one-way clutch having a gear mounted thereon which is rotatable with a speed of rotation, the input shaft being driven by the output member when the speed of rotation of the gear exceeds that of the further shaft, otherwise, the third one-way clutch is freewheeling.

41. The transmission as claimed in claim 40, wherein the third one-way clutch is coupled to the input shaft via a variable ratio gear system.

42. A transmission comprising:

a fixed support;

a torque shaft;

an output member structured and arranged to be rotated about a first axis of rotation by the torque shaft;

an input member which is rotatable about a second axis of rotation relative to the fixed support;

a first one-way clutch between the torque shaft and the output member;

a linkage arrangement rotatable about the second axis of rotation under an influence of said input member; and

a gyroscopic rotor carried by the linkage arrangement and having a spin axis which is cyclically angularly deflected in response to the input member to generate gyroscopic reaction forces,

the reaction forces generated by the gyroscopic rotor when said spin axis is cyclically deflected being applied to the torque shaft as positive and negative torque;

the first one-way clutch being structured and arranged to apply the positive torque to the output member;

the torque shaft being connected over a second one-way clutch opposite to the first one-way clutch to said support to apply the negative torque to the support; and

wherein the output member is rotated by the torque shaft in one direction only.

43. The transmission as claimed in claim 42, wherein the gyroscopic rotor is rotatable about the spin axis with a speed of rotation that is independently variable relative to an input force to alter a magnitude of the reaction forces and thereby the torque being transmitted to the output member.

44. The transmission as claimed in claim 42, wherein the first and second axes are substantially parallel or coincident.

45. The transmission as claimed in claim 42 wherein the linkage arrangement comprises an outer frame rotatable about a first frame axis and an inner frame rotatable relative to the outer frame about a second frame axis perpendicular to the first frame axis, the inner frame carrying said gyroscopic rotor.

46. The transmission as claimed in claim 45, wherein the outer frame is fixed relative to the input member for rotation therewith.

47. The transmission as claimed in claim 45, wherein the spin axis of the gyroscopic rotor is orthogonal to the second frame axis.

48. The transmission as claimed in claim 45, wherein the torque shaft is connected by gearing to the inner frame such that torque applied by the rotor to the inner frame when deflected by rotations of the inner and outer frames, will be transmitted to the torque shaft.

49. The transmission as claimed in claim 42, wherein the input member is additionally coupled to the output member via a further shaft coupled to a third one-way clutch having a gear mounted thereon which is rotatable with a speed of rotation, the input member being driven by the output member when the speed of rotation of the gear exceeds that of the further shaft, otherwise, the third one-way clutch is freewheeling.

50. The transmission as claimed in claim 49, wherein the third one-way clutch is coupled to the input member via a variable ratio gear system.

51. A transmission comprising:

a fixed support;

a torque shaft;

an output member structured and arranged to be rotated about a first axis of rotation by the torque shaft;

an input member which is rotatable about a second axis of rotation relative to the fixed support;

a first one-way clutch between the torque shaft and the output member;

a linkage arrangement rotatable about the second axis of rotation under an influence of said input member; and

a gyroscopic rotor carried by the linkage arrangement and having a spin axis which is cyclically angularly deflected in response to the input member to generate gyroscopic reaction forces,

the reaction forces generated by the gyroscopic rotor when said spin axis is cyclically deflected being applied to the torque shaft as positive and negative torque;

the first one-way clutch being structured and arranged to apply the positive torque to the output member;

the torque shaft being connected over a second one-way clutch opposite to the first one-way clutch to the output member over a rotation reversal system to apply the negative torque to the output member as positive torque; and

wherein the output member is rotated by the torque shaft in one direction only.

52. The transmission as claimed in claim 51, wherein the gyroscopic rotor is rotatable about the spin axis with a speed of rotation that is independently variable relative to an input motion to alter a magnitude of the reaction forces and thereby the torque being transmitted to the output member.

53. The transmission as claimed in claim 51, wherein the first and second axes are substantially parallel or coincident.

54. The transmission as claimed in claim 51, wherein the linkage arrangement comprises an outer frame rotatable about a first frame axis and an inner frame rotatable relative to the outer frame about a second frame axis perpendicular to the first frame axis, the inner frame carrying said gyroscopic rotor.

55. The transmission as claimed in claim 54, wherein the outer frame is fixed relative to the input member for rotation therewith.

56. The transmission as claimed in claim 54, wherein the spin axis of the gyroscopic rotor is orthogonal to the second frame axis.

57. The transmission as claimed in claim 54, wherein the torque shaft is connected by gearing to the inner frame such that torque applied by the rotor to the inner frame when deflected by rotations of the inner and outer frames, will be transmitted to the torque shaft.

58. The transmission as claimed in claim 51, wherein the input member is additionally coupled to the output member via a further shaft coupled to a third one-way clutch having a gear mounted thereon which is rotatable with a speed of rotation, the input member being driven by the output member when the speed of rotation of the gear exceeds that of the further shaft, otherwise, the third one-way clutch is freewheeling.

59. The transmission as claimed in claim 58, wherein the third one-way clutch is coupled to the input member via a variable ration gear system.