Coupling device, in particular for at least two pieces adjustable relative to each other

• US 20040057786A1
• Filed: 09/30/2003
• Published: 03/25/2004
• Est. Priority Date: 10/25/2000
• Status: Abandoned Application

• Current Assignee: Stiwa - Fertigungstechnik Sticht Gesellschaft m.b.H
• Original Assignee: Stiwa - Fertigungstechnik Sticht Gesellschaft m.b.H
• Inventors: Heiml, Roland
• Application Number:
  US10/399,814
• Publication Number:
  US 20040057786A1
• Time in Patent Office: Days
• US Class Current: 403/373
• CPC Class Codes: B60N 2/23 by linear actuators, e.g. linear screw mechanisms
• CPC Class Codes: B62D 1/184 Mechanisms for locking columns at selected positions
• CPC Class Codes: B62D 1/195 Yieldable supports for the steering column
• CPC Class Codes: F16B 5/07 by means of multiple interengaging protrusions on the surfaces, e.g. hooks, coils,
• CPC Class Codes: Y10T 403/7062 Clamped members

Abstract

The invention relates to a coupling mechanism (88), in particular for at least two relatively adjustable parts, each of which is provided with at least one coupling element (65, 72), and the coupling elements (65, 72) are provided with coupling parts standing slightly proud of a bearing surface (53, 54) of the parts receiving them and can be brought into engagement with one another, the coupling parts being of an elastically flexible, reversible design and being designed so as to locate with one another in certain regions in each of their relative positions in order to releasably fix the positioned parts. The parts (89; 90) can be pressurised in order to transmit force in the direction parallel with the bearing surface (53; 54) and are disposed so as to be relatively displaceable by means of an adjusting device (50; 51) for engaging or disengaging the locatable coupling elements (65, 72) at least at an angle relative to the bearing surface (53; 54), in particular perpendicular to the bearing surface (53; 54).

Claims

1. Coupling mechanism, in particular for at least two relatively adjustable parts, each of which is provided with at least one coupling element and the coupling elements are provided with coupling parts which are oriented at least at an angle to a bearing surface of the parts receiving them and can be brought into engagement with one another, being distributed on a surface and having upstanding, slightly elastically flexible projections, characterised in that the parts (89;

90) can be pressurised in order to transmit force in the direction parallel with the bearing surface (53;

54;

71;

123;

129, 137, 140;

162) and are disposed so as to be relatively adjustable by means of an adjusting device (50;

51;

125) for engaging or disengaging the locatable coupling elements (65, 72, 139, 141;

143) at least at an angle relative to the bearing surface (53;

54;

71;

123;

129, 137, 140), in particular perpendicular to the bearing surface (53;

54;

71;

123;

129, 137, 140;

162).

3. Coupling mechanism as claimed in claim 1 or 2, characterised in that at least one of the locatable coupling elements (65, 72) is pressurised into a located, fixing locking position by means of a pressure force.

4. Coupling mechanism as claimed in one or more of the preceding claims characterised in that the adjusting device (50;

51;

125) is designed to apply the pressure force to at least one of the coupling elements (65;

72;

143).

5. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the force which can be transmitted in the direction parallel with the bearing surface (53;

54;

71;

123;

129, 137, 140;

162) is specifically between 1% and 30%, for example 5% and 20%, greater than a pressure force needed for locating purposes.

25. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the coupling elements (65, 72, 143) interlock with one another in a form-fitting arrangement when in a located, fixed locking position and the pressure force applied by the adjusting device (50;

51;

125) releasably fixes the parts (89, 90) in their relative position against the action of at least one elastic return element (74).

26. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the coupling elements (65, 72) can be located with one another in each of their relative positions.

27. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the coupling elements (65;

72) have a flat support body (92) which is provided with coupling parts (91) distributed across the surface.

28. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that in the located, fixed locking position, the mutually facing coupling elements (65;

72) are located with one another in a locking arrangement and the parts (89;

90) are releasably fixed and held mutually positioned with essentially no clearance by means of the mutually locatable coupling elements (65, 72) in the direction parallel with the bearing surface (53;

54;

71;

123;

129).

29. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that a distance (99) between the mutually abutting parts (89;

90) in a located, fixed locking position of the coupling elements (65, 72) is at least slightly greater than a maximum height (96, 97) of the coupling parts (91).

30. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the part or parts (89;

90) is or are made from plastic and the coupling elements (65;

72) are extruded on.

31. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the part or parts (89;

90) and the coupling elements (65;

72), in particular the coupling parts (91), are made from a metal material and the coupling parts (91) have slightly elastically flexible, metal projections (95).

32. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the coupling parts (91), in particular the cores (93), are of an at least slightly elastically flexible design and have a cross section that is substantially frustoconical, pyramid-shaped, cylindrical, etc., or are designed in a filament-like arrangement.

33. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the coupling element (65;

72) is of an integral design and is made from a uniform material.

34. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the coupling element (65;

72) is made from materials having different properties, in particular strength and/or toughness properties.

35. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that at least one strip-shaped coupling element (65) is joined to the first part (89), in particular the support element (9), and at least another strip-shaped coupling element (72) is joined to the other part (90), in particular a base element (67), in a form-fitting and/or friction-locking arrangement.

36. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the first part (89), in particular the support element (9), has a slot (31) extending in the longitudinal direction of the steering shaft (2) and at least one, in particular several, strip-shaped coupling elements (65) are disposed on an internally lying bearing surface (54) in a region bounding the slot (31) in the longitudinal extension of the slot (31).

37. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the first part (89), in particular the mount (7), has at least one orifice (30) extending transversely to the longitudinal direction of the steering shaft (2) and at least one, in particular several, strip-shaped coupling elements (65) extending parallel with the orifice (30) and parallel with each other are disposed on an outwardly lying bearing surface (53) of the mount (7) in a region bounding the orifice (30) in the longitudinal extension of the orifice (30), which is curved and in particular convexly slot-shaped facing a pivot axis (24).

38. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that at least one adjusting mechanism (50;

51) is disposed between the steering shaft (2) and a support element (9) and/or another is disposed between the mount (7) and an operating lever (52) and the adjusting device or devices (50;

51) and the operating lever (52) are retained concentrically and in alignment with one another by a clamping element (33).

39. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the adjusting mechanism (50, 51) consists of a strip-shaped base element (67), at least one strip-shaped guide element (73) and at least one elastic return element (74) disposed between the guide element (73) and the base element (67).

40. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that in a disengaged, released open position, the pressurised guide elements (73) of the adjusting devices (50;

51) are guided by means of the return elements (74), substantially without any clearance, on the bearing surfaces (53;

54) of the mount (7) and/or the support element (9) directed towards the latter and the mutually locatable coupling elements (65;

72) are disposed at a distance apart from one another.

41. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that in the located, fixed, locking position, the oppositely lying mutually facing coupling elements (65;

72) are engaged and the at least one, in particular several, coupling parts (91) incorporating radial, peripherally extending projections (95) are supported against one another.

42. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that at least one coupling part (91) of the one coupling element (72) locates in a bearing region (102) of the other coupling element (65) between spaced apart coupling parts (91) and at least part-regions of the surface (94) or projections (95) of the coupling parts (91) are pressed against one another with a pre-settable contact force.

43. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that at least one strip-shaped coupling element (65) of the coupling mechanism (88) is joined to the first part (89), in particular a guide part (118), and another strip-shaped coupling element (72) is joined to the other part (90), in particular a support part, of the adjusting device (125) in a form-fitting and/or friction locking arrangement.

44. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the coupling element (65;

72) is bonded, welded, riveted, etc., onto the bearing surface (53;

54;

71;

123;

129).

45. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the coupling elements (65, 72) are disposed between a support element (114) and a back part (106) of a vehicle seat (104) or seat for releasably fixing a variably set inclination between the back part (106) and the seat part (105).

46. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the coupling elements (65, 72) are disposed between a body part of a vehicle forming the first part (89) and the other part (90) of a height adjusting mechanism of a strap-type restraining element, in particular a belt, for releasably fixing a variably set height or length thereof.

47. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the first part (89) and the other part (90) are disposed one inside the other and the fist inner part (89) is provided with at least one coupling element (139) on its outer periphery forming a bearing surface (137) and the other outer part (90) has at least one other coupling element (141) on its inner periphery forming a bearing surface (14) directed towards the outer periphery of the first part (89).

48. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that at least part-regions of one of the tubular parts (89, 90), in particular the inner part (89), is designed so as to be elastically deformable in the radial direction relative to the bearing surface (129;

140) and is line-connected to an adjusting mechanism, in particular an actuator, via a connecting line in order to apply pressure to a cavity (142).

49. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the adjusting devices (50;

51;

125) of fixing systems (4;

124), in particular the coupling mechanism (88), can be operated by electrical, mechanical, pneumatic, hydraulic actuators.

50. Coupling mechanism as claimed in one or more of the preceding claims, characterised in that the actuators are provided in the form of slide tracks, positioning elements, roller elements, etc., which are actively linked to the coupling elements (65;

72) during operation.

2. Coupling mechanism, in particular for at least two relatively adjustable parts, each of which is provided with at least one coupling element and the coupling elements are provided with coupling parts standing at least slightly proud of a bearing surface of the parts receiving them and can be brought into engagement with one another, characterised in that the coupling parts (91) are elastically flexible and reversible and are designed to be locatable with one another in certain regions in each of their relative positions in order to releasably fix the positioned parts (89, 90).

6. Coupling mechanism as claimed in one or more of claims 2 to 5, characterised in that the coupling part (91) is provided in the form of a surface profile (151) with profile crests (153) and profile troughs (154) distributed regularly or irregularly along a surface (145) or support body surface (146).

7. Coupling mechanism as claimed in one or more of claims 2 to 6, characterised in that the surface profile (151) is provided in the form of a regular or irregular recurring ripple pattern (152).

8. Coupling mechanism as claimed in one or more of claims 2 to 7, characterised in that the coupling elements (143), which can be located with one another in at least certain regions, have an identical surface profile (151) by reference to a pre-definable surface.

9. Coupling mechanism as claimed in one or more of claims 2 to 7, characterised in that the coupling elements (143) which can be located with one another in at least certain regions have a different surface profile (151) by reference to a pre-definable surface.

10. Coupling mechanism as claimed in one or more of claims 2 to 9, characterised in that an opening width (161) of the profile troughs (154) extending parallel with the surface (145) measured with respect to a mean profile (159) based on the profile crests (153) and profile troughs (154) differs.

11. Coupling mechanism as claimed in one or more of claims 2 to 10, characterised in that the coupling parts (91) and the profile crests (153) and/or profile troughs (154) forming them are designed to be elastically and reversibly deformable, preferably in three directions.

12. Coupling mechanism as claimed in one or more of claims 2 to 11, characterised in that when the parts (89, 90) come into direct contact or abutment, at least two profile crests (153) of the coupling elements (143) are caused to bend in the profiled surface (160) of at least one coupling element (143) and the coupling elements (143) are fixed to one another in a form-fitting and friction-locking arrangement.

13. Coupling mechanism as claimed in one or more of claims 2 to 12, characterised in that that it is made of a single part or multiple parts and of a single layer or multiple layers.

14. Coupling mechanism as claimed in one or more of claims 2 to 13, characterised in that one of the coupling elements (141, 143) has a property that is different from the other coupling element (141, 143), for example in terms of strength, toughness, modulus of elasticity, etc..

15. Coupling mechanism as claimed in one of claims 2 to 14, characterised in that the coupling element (141, 143) has a property in the region of the profiled surface (160) that is different from the rest of the coupling part (91), for example in terms of strength, toughness, modulus of elasticity, etc..

16. Coupling mechanism as claimed in one or more of claims 2 to 15, characterised in that it is provided with an elastically deformable reversible layer and/or with at least one projection (95) standing proud of the layer in the region of the profiled surface (160).

17. Coupling mechanism as claimed in one or more of claims 2 to 16, characterised in that a number of the coupling parts (91) and/or dividing spaces (148a, 148b) between two adjacent coupling parts (91) of the coupling elements which can be brought into engagement with one another is and/or are different.

18. Coupling mechanism as claimed in one or more of claims 2 to 17, characterised in that the mutually locatable coupling elements (143) have at least one bearing region (144) disposed between two mutually adjacent coupling parts (91) as a bearing for several coupling parts (91) which project into them.

19. Coupling mechanism as claimed in one or more of claims 2 to 18, characterised in that the part-regions or a proportion of the coupling parts (91) of the mutually engaged coupling elements (143) are located with one another in a form-fitting arrangement and the other proportion of the coupling parts (91) are located with one another in a friction-locking arrangement.

20. Coupling mechanism as claimed in one or more of claims 2 to 19, characterised in that the force-transmitting proportion of the coupling parts (91) which can be brought into engagement with one another in a form-fitting arrangement constitute between 30% and 100%, in particular between 50% and 90%.

21. Coupling mechanism as claimed in one or more of claims 2 to 20, characterised in that the force-transmitting proportion of the coupling parts (91) which can be brought into engagement with one another in a friction-locking arrangement constitute between 70% and 0%, in particular between 50% and 10%.

22. Coupling mechanism as claimed in one or more of claims 2 to 21, characterised in that a separating distance (148a, 148b) measured between two mutually adjacent coupling parts (91) of the mutually locatable coupling elements (143) is identical.

23. Coupling mechanism as claimed in one or more of claims 2 to 22, characterised in that the coupling part (91) has at least one, in particular several, slightly elastically flexible projections distributed across and standing proud of its surface or has a slightly elastically flexible coating.

24. Coupling mechanism as claimed in one or more of claims 2 to 23, characterised in that when the coupling elements (141;

143) are in a located locking position, a pressing force—

as indicated by arrow (149)—

applied to at least one of the parts (89;

90) of the adjusting device (50;

51;

125) is at least slightly greater than the reaction force induced by the elastically deformed coupling parts (91).

51. Use of the coupling elements as an energy-absorbing deformation system for a force and energy acting in the longitudinal direction and/or transversely to the longitudinal direction of the steering shaft.