AU2018100552B4

AU2018100552B4 - A trailer coupling mount

Info

Publication number: AU2018100552B4
Application number: AU2018100552A
Authority: AU
Inventors: Richard Arakelian
Original assignee: Ark Corp Pty Ltd
Current assignee: Ark Corp Pty Ltd
Priority date: 2018-04-27
Filing date: 2018-04-27
Publication date: 2020-01-16
Anticipated expiration: 2026-04-27
Also published as: AU2018100552A4

Abstract

A TRAILER COUPLING MOUNT A trailer coupling mount is disclosed. The trailer coupling mount includes, in one embodi ment, a base element and one or more tether attachment points integral with the base element. In some embodiments the tether attachment points are disposed on one or more tabs which are formed from the base element and extend therefrom.

Description

A TRAILER COUPLING MOUNT

Technical Field

1. The present technology relates generally to structural elements and accessory elements for assembling trailers and other towed vehicles. Embodiments of the technology find particularly suitable application in off-road trailers and off-road towed vehicles such as caravans and camper trailers.

Background

2. Trailer couplings are known, usually in the form of ball-joint receivers and the like. Off road trailer couplings vary from that structural form, but in general, the trailer couplings (of any suitable form) mount to base plates, which in turn mount to drawbars and/or trailer frames.

3. The base plates and drawbars are known to have limitations. For example, they have welded chain link attachment points for safety chains and other accessory mounts. The chain link is welded to the drawbar or other frame element; an arrangement which is variable in its strength, depending on the skill of the welder. Some base plates are cast; still others are unable to provide sufficient strength or consistency of strength for trailing, whether for simple safety catch operations by a chain tether, or recovery.

4. The present inventor seeks to provide a new trailer coupling mount and/or a trailer coupling mount which seeks to ameliorate one or more of the above disadvantages.

Definitions

The word “tether” as used in this specification and claims is to be understood to cover straps, webbing, chains, ropes, cables and like hauling elements.

The word “integrated” or “integral” or other grammatical variations thereof, as used in this specification and claims, is to be understood to cover welded connections, cast connections, or any suitable connection where at least some of the material of the base element is common with at least some of the material of the tether attachment point. In some embodiments substantially the entire tether attachment point is folded from a base plate, but in some embodiments there may be some tab wholly cut from a base plate or a similar material and attached or re-attached by

2018100552 15 Dec 2019 welding or other suitable fastening process. There are other integration methods such as laying up of various laminates and forming on a last or some appropriate form.

Summary

5. Broadly, the present technology provides a trailer coupling mount which includes one or more integrated tether attachment points. In some embodiments the integrated tether attachment point is disposed on a tab which is integral with and extends from the coupling mount.

6. In accordance with a first aspect of the present technology there is provided a trailer coupling mount which includes a base plate for mounting a trailer coupling, the base plate including side edges; and one or more tether attachments integral with the base plate, the one or more tether attachment points being integral tabs extending from one or more side edges of the base plate and folded downwardly at an angle so as to depend downwardly therefrom.

7. In accordance with another aspect of the present technology there is provided a trailer coupling mount which includes a base element for mounting a trailer coupling and one or more tether attachments integral with and/or formed from, the substrate material of the base element and extending therefrom.

8. In one embodiment the base is a plate so as to provide a flat mounting for the trailer coupling.

9. In one embodiment the base plate is constructed from steel. In one embodiment the steel may be alloyed with suitable elements or compounds such as carbon, chromium, nickel, manganese, boron, molybdenum, vanadium, silicon and like elements. In one embodiment the base plate may be aluminium. In one embodiment the base plate may be some other suitable metal.

10. In one embodiment the base plate is 8mm thick. In other embodiments the base plate is 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19 or 20mm or any suitable thickness of steel.

11. In one embodiment there may be provided a plurality of layers of base plates to provide a laminate base plate. In one embodiment there may be provided a sandwich construction of base plate, and the layers may be steel, aluminium, carbon fibre, GRP, kevlar, or other suitable layers. There may be provided a plurality of layers of kevlar sandwiched between layers of steel, or there may be other combinations to suit various strength and durability requirements.

2018100552 15 Dec 2019

3A

12. In one embodiment the base includes apertures to fasten the trailer coupling therethrough. In one embodiment the apertures are spaced apart from one another

2018100552 27 Apr 2018 so as to provide increased strength for the fastening. In one embodiment the apertures are arranged at the vertices of a rectangle. In one embodiment the apertures are arranged on a pitch circle or other suitable arrangement to suit a coupling fastening arrangement.

13. In one embodiment the base is a trapezoidal shape in plan view, so as to match or at least substantially or generally support a trailer drawbar arrangement where the trailer has frame elements axially loaded, but radially extending or at least extending outwardly from the trailer hitch to the trailer wheels. In one embodiment the trapezoidal shape of the base facilitates welding or other fastening to the radiallyextending or outwardly-extending trailer frame elements.

14. In one embodiment the one or more tether attachments are disposed in the same plane as the base plate.

15. In one embodiment the one or more tether attachments are disposed in a plane that is angled or spaced from the base plate, so as to facilitate clear rotation for the trailer about the coupling.

16. In one embodiment the one or more tether attachments are spaced from an underside of the base plate to facilitate clear rotation of the trailer about the coupling.

17. In one embodiment the one or more tether attachments are disposed on one or more tabs which extend from the base plate. In one embodiment the one or more tabs extend from one or more sides of the base plate.

18. In one embodiment the one or more tabs extend from a side of the base plate at an angle to a centreline of the base plate so as to facilitate a tether extending towards a trailer hitch tether point on a centreline of a towing vehicle. This reduces kinks in the tether and reduces bends and reduces increased stresses in the tether as a result of bends or kinks. The tab itself is to be understood to be stronger if loaded along the longitudinal axis, or at the angle shown, or generally along the length of the tab.

19. The tabs may be disposed at angles to the longitudinal axis so as to provide a plurality of angles, either individually or in combination, to facilitate good strength for recovery or safety chain arrest function. That is, it is to be understood that during recovery or during sever of the trailer coupling, the angle of pull of the tether or chain can vary. Embodiments of the present invention facilitate retention of as much strength as possible during variable loading at variable angles, by promoting flow of stress and strain along the fibres and grains of the base plate material, from the tabs or tether attachment points, since the base plate is integrated therewith.

2018100552 27 Apr 2018

20. The tabs may be disposed along the side, having a longitudinal edge parallel with the longitudinal axis of the base plate. The tabs may also be disposed at suitable angles.

21. In one embodiment the one or more tabs are disposed at an angle to the centreline of the base plate to reduce bends or kinks in the tether and to encourage the tether to extend at an angle towards the centreline of the towed vehicle.

22. In one embodiment the tab is square in shape. In one embodiment the one or more tabs are oval, round, circular, trapezoidal, or any other suitable shape.

23. In one embodiment the tab includes a receiver for receiving an end or connecting portion of a tether assembly.

24. In one embodiment the one or more tabs are the same thickness as the base plate. In one embodiment the one or more tabs are thinner than the base plate.

25. In one embodiment the outline of at least a portion of one or more tabs is cut from the base plate.

26. In one embodiment the tabs are folded out of the base plate plane, until the tab is about perpendicular to the base plate. Any suitable angle, however, is contemplated to be within the scope of the presently-disclosed technology: 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150, 160, 165, 170 or other suitable angle.

27. In one embodiment, the cut and folded tabs provide an integral tether attachment, or in other words, a tether attachment that is integral with the base plate or base element. In other words, the tether attachment is formed from the same substrate material from which the base element is formed. One objective of at least one embodiment is to reduce stress concentrations and variability of strength of known welded tether connections.

28. The cut and folded tab in one embodiment is disposed remotely from the sides of the base plate. There may be more than one tab disposed remotely from the periphery or sides of the base plate.

29. The one or more tether attachment points may be integral tabs extending from one or more sides of a base element.

30. The base element may be a base plate and the tabs may be folded downwardly from sides of the base plate at an angle so as to depend downwardly therefrom.

31. The tabs may be welded to any suitable place on a surface of the base plate.

32. In one embodiment there may be provided gussets to support the tether attachment point or tab. The gussets may be cut and folded from the base element, or welded in place, or fastened behind the tab in some other suitable way.

2018100552 27 Apr 2018

33. In one embodiment the tab receiver is configured to receive a shackle. In one embodiment the shackle is in the form of a hammer lock or D shackle, or any other kind of shackle, which can be opened by unscrewing or other removal of locking pin.

34. In one embodiment the receiver on the tab is in the form of an aperture. In one embodiment the aperture is in the form of a through aperture which extends through the tab.

35. In one embodiment the tab aperture is disposed in the centre of the tab, such that it is closed around its perimeter. Open apertures or recesses are also contemplated as being within the scope of the presently-disclosed technology, however, such that there may be a neck, or throat or some other opening in the tab so as to facilitate attachment to a non-opening fastener such as a shackle; where, for example, there is an eye in the end of a tether, rope or chain.

36. Advantageously, however, one embodiment does include a closed aperture so that the aperture is strong and can provide a standards-rated retrieval force.

37. In this specification, where a document, act or item of knowledge is referred to or discussed, this reference or discussion is not an admission that the document, act or item of knowledge or any combination thereof was at the priority date:

(a) part of common general knowledge; or (b) known to be relevant to an attempt to solve any problem with which this specification is concerned.

38. It is to be noted that, throughout the description and claims of this specification, the word 'comprise' and variations of the word, such as 'comprising' and 'comprises', is not intended to exclude other variants or additional components, integers or steps.

39. In order that the present technology may be more clearly understood, preferred embodiments will be described with reference to the following drawings and examples

Brief Description of the drawings

40. In order to enable a clearer understanding, a preferred embodiment of the technology will now be further explained and illustrated by reference to the accompanying drawings, in which:

41. Figure 1 is a plan view of a trailer coupling mount in accordance with an embodiment of the present invention;

42. Figure 2 is a plan view from underneath of the trailer coupling mount in Figure 1;

43. Figure 3 is a right side elevation view of the trailer coupling mount of Figure 1;

2018100552 27 Apr 2018

44. Figure 4 is a left side elevation view of the trailer coupling mount of Figure 1; and

45. Figure 5 is a front elevation view of the trailer coupling mount of Figure 1.

Detailed description of an example embodiment

46. Referring to the drawings there is shown a trailer coupling mount generally indicated at 10 which includes a base element 15 and two integrated tether attachment points 20 integral therewith. The integral tether attachment points 21 and 22 are disposed on tabs 23, 24 which are integral with and extend from, the base element 15.

47. The trailer coupling mount 10 includes a base element 15 for mounting a trailer coupling and one or more tether attachment points 20 integral with the base element 15.

48. The base element 15 is a base plate 17 so as to provide a flat mounting for the trailer coupling (not shown).

49. The base plate 17 is constructed from steel and the base plate is 8mm thick.

50. The base plate 17 also includes apertures 25 to fasten the trailer coupling (not shown) therethrough. The apertures 25 are spaced apart from one another so as to provide increased strength for the fastening, and in the embodiment shown in the Figures, are arranged at the vertices of a rectangle.

51. The base plate 17 is a trapezoidal shape in plan view, so as to match or at least substantially or generally support a trailer drawbar arrangement where the trailer has frame elements axially loaded, but radially extending or at least extending outwardly from the trailer hitch to the trailer wheels. The trapezoidal shape of the base plate 17 facilitates welding or other fastening to the radially-extending or outwardly-extending trailer frame elements (not shown).

52. The tether attachment points 21,22 are disposed in a plane that is angled or spaced from the base plate, so as to facilitate clear rotation for the trailer about the coupling. The tether attachment points 21,22 provide a connection point, for a tether or chain, that is spaced from an underside of the base plate 17 to facilitate clear rotation of the trailer (not shown) about the coupling (not shown).

53. The tether attachment points 21,22 are disposed on one or more tabs 23, 24 which extend from the base plate 17. The tabs 23, 24 extend from one or more side edges 40, 41 of the base plate 17. The tabs 23, 24 extend from a side edge of the base plate 17, at the front edge 42 (to reduce chain or tether length required), at an angle to a centreline of the base plate 17 so as to facilitate a tether (not shown) extending towards a trailer hitch tether point (not shown) on a centreline of

2018100552 27 Apr 2018 a towing vehicle (not shown). This reduces kinks in the tether (not shown) and reduces bends and reduces increased stresses in the tether as a result of bends or kinks.

54. The one or more tabs 23, 24 are disposed at an angle to the centreline of the base plate 17 to reduce bends or kinks in the tether and to encourage the tether to extend at an angle towards the centreline of the towed vehicle.

55. The tabs 23, 24 are square in shape, for ease of manufacture and reduction in cost, and for additional strength. There is an annular margin 26 which provides adjditional strength for recovery if the trailer becomes stuck in difficult terrain.

56. The tab 23, 24 includes a receiver 28 for receiving an end or connecting portion of a tether assembly. The tab receiver 28 is configured to receive a shackle (not shown), and preferably, a hammer lock shackle but any suitable kind of shackle or fastener is contemplated for use, including D-shackles and other shackles.

57. The receiver 28 is in the form of an aperture 29. The aperture 29 is in the form of a through aperture which extends through the tab 23, 24.

58. The tab aperture 29 is disposed in the centre of the tab 23, 24, such that it is closed around its perimeter.

59. The one or more tabs 23, 24 are the same thickness as the base plate and, to form, the one embodiment shown of tab 23, 24, is cut from the base plate 17 and folded out of the base plate plane, until the tab 23, 24 is about perpendicular to the base plate 17.

60. In use, a fitter fits the base plate on the trailer frame elements (not shown) and welds the plate 17 to the trailer frame along the side edges 40, 41. The trailer coupling is fastened into apertures 25. Then, hammer lock shackles are fitted into apertures 28 on the tabs 23, 24. Chains are fitted to the shackles at the trailer end and the chains are fitted then, to the trailer hitch at the towing vehicle end, via shackles or other fasteners, if necessary.

61. The extra strength provided by the integral tabs allows the trailer to be recovered by snatch straps, or chains or other recovery and retrieval elements, by the tabs and not the coupling, if the trailer becomes stuck in difficult terrain.

62. Modifications and improvements to the invention will be readily apparent to those skilled in the art. Such modifications and improvements are intended to be within the scope of this invention.

Claims

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:

1. A trailer coupling mount including:

a base plate for mounting a trailer coupling, the base plate including side edges; and one or more tether attachment points integral with the base plate, the one or more tether attachment points being integral tabs extending from one or more side edges of the base plate and folded downwardly at an angle so as to depend downwardly therefrom.
2. The trailer coupling mount in accordance with claim 1 wherein the base element is a trapezoidal shape in plan view such that its sides substantially follow the path of tapering trailer elements.
3. The trailer coupling mount in accordance with claim 1 or 2 wherein the tabs are disposed along the side edges of the base plate, having a longitudinal edge parallel with a longitudinal axis of the base plate.
4. The trailer coupling mount in accordance with any one of claims 1 to 3 wherein the one or more integral tabs extend downwardly about perpendicular to the base plate.
5. The trailer coupling mount in accordance with any one of claims 1 to 4 wherein the one or more integral tabs include a receiver for receiving an end of a tether or a fastening, the receiver including a through aperture in the one or more integral tabs.