Friction-wheel planetary gear for converting a rotating movement into a back and forth movement with decreased frequency

• US 7,086,979 B2
• Filed: 05/17/2002
• Issued: 08/08/2006
• Est. Priority Date: 05/18/2001
• Status: Expired due to Term

• Current Assignee: Gustav Klauke GmbH (Emerson Electric Company)
• Original Assignee: Gustav Klauke GmbH (Emerson Electric Company)
• Inventors: Frenken, Egbert
• Primary Examiner(s): LEWIS, TISHA D
• Application Number:
  US10/477,339
• Publication Number:
  US 20040182189A1
• Time in Patent Office: 1,544 Days
• Field of Search: 475/331, 475/182, 475/170, 475/185, 475/189, 475/195, 475/196, 475/335
• US Class Current: 475/182
• CPC Class Codes: F16H 1/28 with gears having orbital motion
• CPC Class Codes: F16H 13/06 with members having orbital motion
• CPC Class Codes: F16H 2001/2881 comprising two axially spaced central gears, i.e. ring or sun gear, engaged by at least one common orbital gear wherein one of the central gears is forming the output
• CPC Class Codes: F16H 25/12 with reciprocation along the axis of rotation, e.g. gearings with helical grooves and automatic reversal or cams
• CPC Class Codes: F16H 57/02004 the gears being positioned relative to one another by rolling members or by specially adapted surfaces on the gears, e.g. by a rolling surface with the diameter of the pitch circle
• CPC Class Codes: Y10T 74/19642 Directly cooperating gears

Abstract

A gear mechanism or motor includes a shaft, and output rotary bodies which are in engagement therewith. The bodies interact with the shaft in the radial direction, by bearing against the shaft, and interact in the axial direction of the shaft with an upper guideway body which can move in the axial direction and is loaded toward the bodies. An interaction region of the shaft has a circular cross section. A guideway of the guideway body is structured in terms of its height over its periphery.

Claims

1. A gear mechanism comprising:

a gear-mechanism shaft, an upper guideway body having a guideway, and output rotary bodies which are in engagement with the gear-mechanism shaft, the output rotary bodies interact with the gear-mechanism shaft in the radial direction, by bearing against the gear-mechanism shaft, and interact in the axial direction of the gear-mechanism shaft with the upper guideway body which can move in the axial direction and is loaded toward the output rotary bodies, an interaction region of the gear-mechanism shaft having a circular cross section, and the guideway of the upper guideway body is structured in terms of its height over its periphery in relation to a circumferential circular orbit of the output rotary bodies, so that a to and fro movement of the upper guideway body in the direction of the gear mechanism shaft results.

3. A gear mechanism according to claim 1, wherein the axes of rotation of the output rotary bodies revolve on a circular orbit.

4. A gear mechanism according claim 1, wherein at least one of said output rotary bodies is circular in cross section.

5. A gear mechanism according to claim 1, wherein the gear-mechanism shaft is circular in cross section in the region of interaction with the output rotary bodies.

6. A gear mechanism according to claim 1, wherein the gear mechanism is a speed reduction gear mechanism, and in that the output rotary bodies which are used to bearingly support the gear-mechanism shaft revolve at a significantly lower frequency than the rotational frequency of the gear-mechanism shaft.

7. A gear mechanism according to claim 1, wherein the gear-mechanism shaft has a continuous circular cross section.

8. A gear mechanism according to claim 1, wherein the output rotary bodies execute an oscillating movement relative to the gear-mechanism shaft while always remaining in contact with the gear-mechanism shaft.

9. A gear mechanism according to claim 1, wherein the guideway of the upper guideway body runs such that it is inclined toward the gear-mechanism shaft, said guideway, in cross section, including an acute angle with a longitudinal axis of the gear-mechanism shaft as seen toward a free end of the gear-mechanism shaft.

10. A gear mechanism according to claim 1, wherein the structuring over the height is produced relative to a circle which is concentric with respect to the gear-mechanism shaft.

11. A gear mechanism according to claim 1, wherein the output rotary bodies are configured in disk form.

12. A gear mechanism according to claim 1, wherein the output rotary bodies are held in a cage, diametrically opposite one another with respect to the gear-mechanism shaft.

13. A gear mechanism according to claim 1, wherein the output rotary bodies interact with a lower guideway body.

14. A gear mechanism according to claim 13, wherein a guideway of the lower guideway body runs such that it is inclined toward the gear-mechanism shaft, including, in cross section, an acute angle with a longitudinal axis of the gear-mechanism shaft.

15. A gear mechanism according to claim 13, wherein a guideway of the lower guideway body is structured in terms of its height over its periphery in relation to a circumferential circular orbit of the output rotary bodies, so that a to and fro movement of the upper guideway body in direction of the gear mechanism shaft results.

16. A gear mechanism according to claim 13, wherein at least with structuring of the lower guideway body and upper guideway body in terms of their height, these two components can be adjusted in terms of their periphery with respect to one another in the peripheral direction.

17. A gear mechanism according to claim 1, wherein at least one of said output rotary bodies has a shaft engagement surface which extends parallel to the axis of the gear-mechanism shaft.

18. A gear mechanism according to claim 13, wherein at least one of said output rotary bodies has a guideway engagement surface which extends at the same angle with respect to the gear-mechanism shaft as the guideway of the associated guideway body with respect to the gear-mechanism shaft.

19. A gear mechanism according to claim 13, wherein at least one of said output rotary bodies interacts, by means of a peripheral edge as a guideway engagement surface, with the guideway of the associated guideway body.

20. A gear mechanism according to claim 1, wherein the gear mechanism shaft has peripheral toothing which meshes with peripheral toothing on the output rotary bodies.

21. A gear mechanism according claim 1, wherein the output rotary bodies mesh with internal toothing of a ring body which accommodates the output rotary bodies and the gear-mechanism shaft.

22. A gear mechanism according to claim 1, wherein three or more output rotary bodies are provided.

23. A gear mechanism according to claim 1, wherein two or more assemblies of output rotary bodies and an upper guideway body are provided in succession in the axial direction.

2. A motor, comprising:

an output shaft, the output shaft having a radial bearing arrangement, the bearing arrangement including an upper guideway body having a guideway, and output rotary bodies which interact directly with the output shaft, in that the output rotary bodies are circular in cross section, and the output shaft is circular in cross section in the interaction region, and in that the output rotary bodies interact with the upper guideway body, the guideway of the upper guideway body is structured in terms of its height over its periphery in relation to a circumferential circular orbit of the output rotary bodies, so that a to and fro movement of the upper guideway body in direction of the output shaft results.

24. A motor according to claim 2, wherein the axes of rotation of the output rotary bodies revolve on a circular orbit.

25. A motor according to claim 2, wherein at least one of said output rotary bodies is circular in cross section.

26. A motor according to claim 2, wherein the gear-mechanism shaft is circular in cross section in the region of interaction with the output rotary bodies.

27. A motor according to claim 2, wherein the gear mechanism is a speed reduction gear mechanism, and in that the output rotary bodies which are used to bearingly support the gear-mechanism shaft revolve at a significantly lower frequency than the rotational frequency of the gear-mechanism shaft.

28. A motor according to claim 2, wherein the gear-mechanism shaft has a continuous circular cross section.

29. A motor according to claim 2, wherein the output rotary bodies execute an oscillating movement relative to the gear-mechanism shaft while always remaining in contact with the latter.

30. A motor according to claim 2, wherein the guideway of the upper guideway body runs such that it is inclined toward the gear-mechanism shaft, said guideway, in cross section, including an acute angle with a longitudinal axis of the output shaft as seen toward a free end of the output shaft.

31. A motor according to claim 2, wherein the structuring over the height is produced relative to a circle which is concentric with respect to the output shaft.

32. A motor according to claim 2, wherein the output rotary bodies are configured in disk form.

33. A motor according to claim 2, wherein the output rotary bodies are held in a cage, diametrically opposite one another with respect to the output shaft.

34. A motor according to claim 2, wherein the output rotary bodies interact with a lower guideway body.

35. A motor according to claim 34, wherein a guideway of the lower guideway body runs such that it is inclined toward the output shaft, including, in cross section, an acute angle with a longitudinal axis of the output shaft, as seen toward the motor-side end of the output shaft.

36. A motor according to claim 34, wherein a guideway of the lower guideway body is structured in terms of its height over its periphery.

37. A motor according to claim 34, wherein at least with structuring of the lower guideway body and upper guideway body in terms of their height, these two components can be adjusted in terms of their periphery with respect to one another in the peripheral direction.

38. A motor according to claim 2, wherein at least one of said output rotary bodies has a shaft engagement surface which extends parallel to the axis of the output shaft.

39. A motor according to claim 34, wherein each said output rotary body has a guideway engagement surface which extends at the same angle with respect to the output shaft as the guideway of the associated guideway body with respect to the output shaft.

40. A motor according to claim 34, wherein each said output rotary body interacts, by means of a peripheral edge as guideway engagement surface, with the guideway of the associated guideway body.

41. A motor according to claim 2, wherein the output shaft has peripheral toothing which meshes with peripheral toothing on the output rotary bodies.

42. A motor according to claim 2, wherein the output rotary bodies mesh with internal toothing of a ring body which accommodates the output rotary bodies and the output shaft.

43. A motor according to claim 2, wherein three or more output rotary bodies are provided.

44. A motor according to claim 2, wherein two or more assemblies of output rotary bodies and an upper guideway body are provided in succession in the axial direction.