Double stage taumel gear reduction unit

• US 4,884,844 A
• Filed: 08/31/1988
• Issued: 12/05/1989
• Est. Priority Date: 09/01/1987
• Status: Expired due to Term

• Current Assignee: Siemens Automotive Ltd (Siemens AG)
• Original Assignee: Magna International Incorporated
• Inventors: Olmstead, Gordon, Meixner, Beo, Kershaw, Peter
• Primary Examiner(s): Brown, Peter R.
• Application Number:
  US07/238,396
• Time in Patent Office: 461 Days
• Field of Search: 297/362, 74/804
• US Class Current: 297/362
• CPC Class Codes: B60N 2/2252 in which the central axis of the gearing lies inside the periphery of an orbital gear, e.g. one gear without sun gear

Abstract

A modular taumel reduction device having a housing having internally positioned integrally formed teeth in one embodiment, further containing therewithin at least two concentric planetary gears in communication with each other which rotate and wobble individually within the housing and reduce the input from a preferably flat motor to, in one embodiment, a seat back.

Claims

1. A modular taumel reduction device comprising a housing having an exterior surface, interior surface and at least two ends, the housing having an opening extending from end to end along a first axis of extension through the opening of the housing, the housing having mounting means disposed proximate the exterior surface thereof, the interior surface of the housing having a multiplicity of detent means disposed thereupon, the housing having disposed at one end thereof driving means extending at least partially into the opening of the housing, the driving means having first engagement means extending therefrom proximate the housing for engagement with a first driven means, the first driven means being contained within the housing and having compatible detent means disposed about its perimeter for communication with the detent means disposed on the interior surface of the housing, the first driven means having fewer numbered compatible detent means than those disposed upon the interior surface of the housing or being smaller in diameter than said opening of said housing, the first driven means having second engagement means extending therefrom in a direction substantially parallel to the extension of the first engagement means, the second engagement means for engagement with a second driven means, the second driven means being contained within the housing having compatible detent means disposed about its perimeter for communication with the detent means disposed on the interior surface of the housing, the second driven means having fewer numbered compatible detent means than those disposed upon the interior surface of the housing or being smaller in diameter than said opening of said housing, the second driven means having third engagement means extending therefrom in a direction substantially parallel to the extension of the first and second engagement means, the third engagement means for engagement with at least a third driven means or a moveable frame or lever;

whereby when the driving means drives the first engagement means to engage the first driven means such engagement will result in the wobbling of the first driven means within the housing as the detent means of the first driven means intermittently engages the detent means upon the interior of the housing, such intermittent engagement being predetermined to effect a reduction in the speed of the first driven means with respect to the driving means, the first driven means thereby driving the second engagement means thereof to engage the second driven means, such engagement resulting in the wobbling of the second driven means within the housing as the detent means of the second driven means intermittently engages the detent means upon the interior of the housing, such intermittent engagement being predetermined to effect a reduction in the speed of the second driven means with respect to the first driven means, the second driven means thereby driving the third engagement means thereof to engage at least a third driven means, a moveable frame, or lever at a substantially reduced output speed to that of the speed of the driving means.

3. The reduction unit of claim 1 or 2 wherein the driven means are gears.

4. The reduction unit of claim 1 or 2 comprising a remote driving means in communication with the reduction unit by a drive shaft engaging the reduction unit.

5. The reduction unit of claim 4 comprising first and second driven means of substantially equivalent diameters whereby the second and third axes are substantially coincident.

6. The reduction unit of claim 5 comprising first engagement means comprising an eccentric cam in communication with the driving means.

7. The reduction unit of claim 4 comprising third engagement means comprising at least one arcuate pin extending outwardly away from the second driven means remote the driving means.

8. The reduction unit of claim 4 comprising second engagement means comprising a carrier plate having at one end thereof at least one pin extending therefrom proximate the first driven means for engagement therewith, and having extending therefrom at the other end remote the first driven means an eccentric cam in communication with the second driven means.

9. The reduction unit of claim 4 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

10. The reduction unit of claim 4 comprising driven means comprising an electric motor embodying a rare earth magnet, for example a neodymium magnet, providing higher density flux.

11. The reduction unit of claim 1 or 2 comprising first and second driven means of substantially equivalent diameters whereby the second and third axes are substantially coincident.

12. The reduction unit of claim 11 comprising first engagement means comprising an eccentric cam in communication with the driving means.

13. The reduction unit of claim 11 comprising third engagement means comprising at least one arcuate pin extending outwardly away from the second driven means remote the driving means.

14. The reduction unit of claim 11 comprising second engagement means comprising a carrier plate having at one end thereof at least one pin extending therefrom proximate the first driven means for engagement therewith, and having extending therefrom at the other end remote the first driven means an eccentric cam in communication with the second driven means.

15. The reduction unit of claim 11 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

16. The reduction unit of claim 1 or 2 comprising first engagement means comprising an eccentric cam in communication with the driving means.

17. The reduction unit of claim 16 comprising third engagement means comprising at least one arcuate pin extending outwardly away from the second driven means remote the driving means.

18. The reduction unit of claim 16 comprising second engagement means comprising a carrier plate having at one end thereof at least one pin extending therefrom proximate the first driven means for engagement therewith, and having extending therefrom at the other end remote the first driven means an eccentric cam in communication with the second driven means.

19. The reduction unit of claim 16 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

20. The reduction unit of claim 1 or 2 comprising third engagement means comprising at least one arcuate pin extending outwardly away from the second driven means remote the driving means.

21. The reduction unit of claim 20 comprising second engagement means comprising a carrier plate having at one end thereof at least one pin extending therefrom proximate the first driven means for engagement therewith, and having extending therefrom at the other end remote the first driven means an eccentric cam in communication with the second driven means.

22. The reduction unit of claim 20 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

23. The reduction unit of claim 20 comprising driving means comprising an electric motor embodying a rare earth magnet, for example a neodymium magnet, providing higher density flux.

24. The reduction unit of claim 1 or 2 comprising some components manufactured from sintered metal.

25. The reduction unit of claim 24 comprising second engagement means comprising a carrier plate having at one end thereof at least one pin extending therefrom proximate the first driven means for engagement therewith, and having extending therefrom at the other end remote the first driven means an eccentric cam in communication with the second driven means.

26. The reduction unit of claim 24 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

27. The reduction unit of claim 1 or 2 comprising second engagement means comprising a carrier plate having at one end thereof at least one pin extending therefrom proximate the first driven means for engagement therewith, and having extending therefrom at the other end remote the first driven means an eccentric cam in communication with the second driven means.

28. The reduction unit of claim 27 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

29. The reduction unit of claim 27 comprising driven means comprising an electric motor embodying a rare earth magnet, for example a neodymium magnet, providing higher density flux.

30. The reduction unit of claim 1 or 2 comprising some components manufactured from resilient non-metallic materials.

31. The reduction unit of claim 30 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

32. The reduction unit of claim 1 or 2 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driven means.

33. The reduction unit of claim 32 comprising driving means comprising an electric motor embodying a rare earth magnet, for example a neodymium magnet, providing higher density flux.

34. The reduction unit of claim 1 or 2 comprising driving means comprising an electric motor embodying a rare earth magnet, for example a neodymium magnet, providing higher density flux.

2. For use in a seat recliner a modular taumel reduction device comprising a housing having an exterior surface, interior surface and at least two ends, the housing having an opening extending from end to end along a first axis for extension through the opening of the housing, the housing having mounting means disposed proximate the exterior surface thereof, the interior surface of the housing having a multiplicity of detent means disposed thereupon, the housing having disposed at one end thereof driving means extending at least partially into the opening of the housing, the driving means having first engagement means extending therefrom proximate the housing for engagement with a first driven means, the first driven means being contained within the housing and having compatible detent means disposed about its perimeter for communication with the detent means disposed on the interior surface of the housing, the first driven means having fewer numbered compatible detent means than those disposed upon the interior surface of the housing or being smaller in diameter than said opening of said housing, the first driven means having second engagement means extending therefrom in a direction substantially parallel to the extension of the first engagement means, the second engagement means for engagement with a second driven means, the second driven means being contained within the housing having compatible detent means disposed about its perimeter for communication with the detent means disposed on the interior surface of the housing, the second driven means having fewer numbered compatible detent means than those disposed upon the interior surface of the housing or being smaller in diameter than said opening of said housing, the second driven means having third engagement means extending therefrom in a direction substantially parallel to the extension of the first and second engagement means, the third engagement means for engagement with at least a third driven means or a moveable frame or lever;

whereby when the driving means drives the first engagement means to engage the first driven means such engagement will result in the wobbling of the first driven means within the housing as the detent means of the first driven means intermittently engages the detent means upon the interior of the housing, such intermittent engagement being predetermined to effect a reduction in the speed of the first driven means with respect to the driving means, the first driven means thereby driving the second engagement means thereof to engage the second driven means, such engagement resulting in the wobbling of the second driven means within the housing as the detent means of the second driven means intermittently engages the detent means upon the interior of the housing, such intermittent engagement being predetermined to effect a reduction in the speed of the second driven means with respect to the first driven means, the second driven means thereby driving the third engagement means thereof to engage at least a third driven means, a moveable frame or lever in communication with the seat recliner at a substantially reduced output speed to that of the speed of the driving means.

35. A modular taumel gear reduction device comprising a housing having an exterior surface, interior surface and at least two ends, the housing having an opening extending from end to end along a first axis of extension through the opening of the housing, the housing having mounting means disposed proximate the exterior surface thereof, the interior surface of the housing having a multiplicity of teeth disposed thereupon, the housing having disposed at one end thereof driving means extending at least partially into the opening of the housing, the driving means having first engagement means extending therefrom proximate the housing for engagement with a first driven means, the first driven means being contained within the housing and having compatible teeth disposed about its perimeter for communication with the teeth disposed on the interior surface of the housing, the first driven means having fewer numbered compatible teeth than those disposed upon the interior surface of the housing, the first driven means having second engagement means extending therefrom in a direction substantially parallel to the extension of the first engagement means, the second engagement means for engagement with a second driven means, the second driven means being contained within the housing having compatible teeth disposed about its perimeter for communication with the teeth disposed on the interior surface of the housing, the second driven means having fewer numbered compatible teeth than those disposed upon the interior surface of the housing, the second driven means having third engagement means extending therefrom in a direction substantially parallel to the extension of the first and second engagement means, the third engagement means for engagement with at least a third driven means or a moveable frame or lever;

whereby when the driving means drives the first engagement means to engage the first driven means such engagement will result in the wobbling of the first driven means within the housing as the teeth of the first driven means intermittently engage the teeth disposed upon the interior of the housing, such intermittent engagement being predetermined to effect a reduction in the speed of the first driven means with respect to the driving means, the first driven means thereby driving the second engagement means thereof to engage the second driven means, such engagement resulting in the wobbling of the second driven means within the housing as the teeth of the second driven means intermittently engages the teeth disposed upon the interior of the housing, such intermittent engagement being predetermined to effect a reduction in the speed of the second driven means with respect to the first driven means, the second driven means thereby driving the third engagement means thereof to engage at least a third driven means, a moveable frame, or lever at a substantially reduced output speed to that of the speed of the driving means.

37. The reduction unit of claim 35 or 36 wherein the driven means are gears.

38. The reduction unit of claim 35 or 36 comprising a remote driving means in communication with the reduction unit by a drive shaft engaging the reduction unit.

39. The reduction unit of claim 38 comprising driving means comprising an electric motor embodying a rare earth magnet, for example a neodymium magnet, providing higher density flux.

40. The reduction unit of claim 35 or 36 comprising first engagement means comprising an eccentric cam in communication with the driving means.

41. The reduction unit of claim 40 comprising third engagement means comprising at least one arcuate pin extending outwardly away from the second driven means remote the driving means.

42. The reduction unit of claim 40 comprising second engagement means comprising a carrier plate having at one end thereof at least one pin extending therefrom proximate the first driven means for engagement therewith, and having extending therefrom at the other end remote the first driven means an eccentric cam in communication with the second driven means.

43. The reduction unit of claim 40 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

44. The reduction unit of claim 35 or 36 comprising third engagement means comprising at least one arcuate pin extending outwardly away from the second driven means remote the driving means.

45. The reduction unit of claim 44 comprising second engagement means comprising a carrier plate having at one end thereof at least one pin extending therefrom proximate the first driven means for engagement therewith, and having extending therefrom at the other end remote the first driven means an eccentric cam in communication with the second driven means.

46. The reduction unit of claim 44 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

47. The reduction unit of claim 44 comprising driving means comprising an electric motor embodying a rare earth magnet, for example a neodymium magnet, providing higher density flux.

48. The reduction unit of claim 35 or 36 comprising some components manufactured from sintered metal.

49. The reduction unit of claim 48 comprising second engagement means comprising a carrier plate having at one end thereof at least one pin extending therefrom proximate the first driven means for engagement therewith, and having extending therefrom at the other end remote the first driven means an eccentric cam in communication with the second driven means.

50. The reduction unit of claim 48 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

51. The reduction unit of claim 35 or 36 comprising second engagement means comprising a carrier plate having at one end thereof at least one pin extending therefrom proximate the first driven means for engagement therewith, and having extending therefrom at the other end remote the first driven means an eccentric cam in communication with the second driven means.

52. The reduction unit of claim 51 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

53. The reduction unit of claim 51 comprising driving means comprising an electric motor embodying a rare earth magnet, for example a neodymium magnet, providing higher density flux.

54. The reduction unit of claim 35 or 36 comprising some components manufactured from resilient non-metallic materials.

55. The reduction unit of claim 54 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driving means.

56. The reduction unit of claim 35 or 36 comprising an end plate closing the housing at the end thereof remote the driving means, the end plate having compatible arcuate slots therein to determine the extent of movement of the at least one arcuate pin extending outwardly from the second driven means remote the driven means.

57. The reduction unit of claim 56 comprising driving means comprising an electric motor embodying a rare earth magnet, for example a neodymium magnet, providing higher density flux.

58. The reduction unit of claim 35 or 36 comprising driving means comprising an electric motor embodying a rare earth magnet, for example a neodymium magnet, providing higher density flux.

36. For use in a seat recliner a modular taumel gear reduction device comprising a housing having an exterior surface, interior surface and at least two ends, the housing having an opening extending from end to end along a first axis of extension through the opening of the housing, the housing having mounting means disposed proximate the exterior surface thereof, the interior surface of the housing having a multiplicity of teeth disposed thereupon, the housing having disposed at one end thereof driving means extending at least partially into the opening of the housing, the driving means having first engagement means extending therefrom proximate the housing for engagement with a first driven means, the first driven means being contained within the housing and having compatible teeth disposed about its perimeter for communication with the teeth disposed on the interior surface of the housing, the first driven means having fewer numbered compatible teeth than those disposed upon the interior surface of the housing, the first driven means having second engagement means extending therefrom in a direction substantially parallel to the extension of the first engagement means, the second engagement means for engagement with a second driven means, the second driven means being contained within the housing having compatible teeth disposed about its perimeter for communication with the teeth disposed on the interior surface of the housing, the second driven means having fewer numbered compatible teeth than those disposed upon the interior surface of the housing, the second driven means having third engagment means extending therefrom in a direction substantially parallel to the extension of the first and second engagement means, the third engagement means for engagement with at least a third driven means or a moveable frame or lever;

whereby when the driving means drives the first engagement means to engage the first driven means such engagement will result in the wobbling of the first driven means within the housing as the teeth of the first driven means intermittently engage the teeth disposed upon the interior of the housing, such intermittent engagement being predetermined to effect a reduction in the speed of the first driven means with respect to the driving means, the first driven means thereby driving the second engagement means thereof to engage the second driven means, such engagement resulting in the wobbling of the second driven means within the housing as the teeth of the second driven means intermittently engage the teeth disposed upon the interior of the housing, such intermittent engagement being predetermined to effect a reduction in the speed of the second driven means with respect to the first driven means, the second driven means thereby driving the third engagement means thereof to engage at least a third driven means, a moveable frame, or lever in communication with the seat recliner at a substantially reduced output speed to that of the speed of the driving means.