Substitute flange sleeve for alternative mounting of a cylindrical heavy duty Deutsch type on-board diagnostic receptacle

Abstract

A flanged vehicle-mounting sleeve is provided for use in association with a heavy duty vehicle, chassis-mountable, data bus signal wiring harness coupling. The coupling includes a receptacle having a generally circular cross-section and being adapted to be accommodated in longitudinal pass-through relation by a corresponding vehicle chassis mount including a mounting aperture for the coupling. The receptacle may also include a receptacle-flange engagable in receptacle-flange matching chassis-secured relation with a compatible receptacle-flange chassis mount adjacent the vehicle chassis mounting aperture with the receptacle supported thereby in pass-thru relation with the aperture. The optional sleeve is adapted to be slidably mounted into cooperative engagement in conjoined, axially and radially fixed relation on the receptacle with an alternative sleeve-flange engagable in flange-matching chassis-secured relation adjacent the vehicle chassis mounting aperture with the receptacle supported thereby in pass-thru relation with the aperture.

Description

FIELD

Aspects of the present disclosure relate to vehicle chassis mounting of so-called “Deutsch”, standard cylindrical form-factor data bus wiring harness couplings using a substitute flange mounting sleeve compatible with corresponding original vehicle manufacturer's chassis mountings.

BACKGROUND

There are significant costs and logistical problems related to the provision of so-called heavy duty wiring harnesses that utilize Deutsch connectors for aftermarket installations of vehicular data bus accessing devices, including for example telematics devices for variously recording and/or transmitting vehicular data. Although the cylindrical form factor associated with such connectors is reasonably standard in the industry, the problems arise in providing for compatible flanges in mounting the connectors on differing manufacturers' vehicles, where the flange provisions for chassis OEM mountings of the in-cab diagnostic link connector can differ.

SUMMARY

Aspects of the present disclosure relate to a sleeve adapted to be paired with a flanged receptacle—and when so paired, to provide an alternative to the receptacle's flange for vehicle mounting of the receptacle.

Accordingly, an aspect of the disclosure relates to a flanged vehicle-mounting sleeve, for use in association with a heavy duty vehicle, chassis-mountable, data bus signal wiring harness coupling which further includes a receptacle substantially as described herein. The sleeve is adapted to be slidably mounted into cooperative engagement in conjoined, axially and radially fixed relation on the receptacle with the sleeve's flange engagable in flange-matching chassis-secured relation adjacent the vehicle chassis mounting aperture with the receptacle supported thereby in pass-thru relation with the aperture.

In accordance with an aspect of the present disclosure there is provided a heavy duty vehicle, chassis-mountable, data bus signal wiring harness coupling comprising a flanged receptacle in combination with and an alternatively flanged vehicle-mounting sleeve. The receptacle in such a combination has a generally circular cross-section and is adapted to be accommodated in longitudinal pass-through relation by a corresponding vehicle chassis mounting aperture for the coupling. In addition, the receptacle has a plurality of conductor-receiving, longitudinally-extending bores adapted to be selectively populated by data bus signal wiring and associated contact terminals corresponding in numbering and arrangement to a corresponding heavy duty vehicle's data bus data link connector. More particularly, the receptacle has a mounting flange adapted for, and useful when, the receptacle is employed independently of the combination: to secure the coupling by way of the receptacle flange, to the vehicle chassis mounting. In the combination with the receptacle, the sleeve is adapted to be slidably mounted into cooperative engagement in conjoined, axially and radially fixed relation on the receptacle with the sleeve's flange engagable in flange-matching chassis-secured relation adjacent the vehicle chassis mounting aperture with the receptacle supported thereby in pass-thru relation with the aperture. With the sleeve engaged with the receptacle, the coupling is provided with an alternative (to the receptacle flange) flange for vehicle mountings for which the receptacle flange is incompatible.

Aspects of the present disclosure furthermore relates to sets or kits comprising a receptacle and one or more alternative flanged sleeves, as schematically depicted in FIG. 6. The sleeve (or sleeves as the case may be), is/are operable to be selectively engaged with the receptacle to thereby provide for alternative, flange-matching chassis-secured relation of the coupling for a particular vehicle application. In other words such a set includes one or more sleeves providing for a corresponding variety of different alternative flanges, respectively suited to differing vehicle chassis installations and from amongst which an installer can select a sleeve with a flange configuration compatible with the instance of a particular installation of the data bus signal wiring coupling on a particular vehicle's chassis mounting.

Aspects of the present disclosure further relate to the provision of couplings thereof in association with one or more of a plurality of wiring harness termini respectively adapted to provide wiring connections to a corresponding plurality of after-market vehicle data bus accessing devices, and in particular wherein at least one of the termini is adapted to be associated with a vehicle's OEM provision for the vehicle chassis mounted coupling. In such an arrangement, the wiring harness would make provision for a common connection with the vehicular data bus link connector, and various termini respectively serving connections with the diverse aftermarket devices.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 depicts an exploded perspective view of a coupling according to one embodiment, including a substitute flange sleeve and a receptacle adapted to be mutually paired in an assembled coupling;

FIG. 2 depicts a perspective view showing a Deutsch type receptacle;

FIG. 3 depicts an elevated side view of the assembled coupling depicted in FIG. 2;

FIG. 4 depicts a perspective view of a sleeve/receptacle assembly according to an embodiment;

FIG. 5 depicts a “T” wiring harness including a coupling in accordance with one embodiment aspect of the present invention;

FIG. 6 is a schematic depiction of a kit having a receptacle and alternative flanged sleeves.

DETAILED DESCRIPTION

Referring now to the drawings in general, there are illustrated an elements and arrangements thereof useful in conjunction with a vehicle-mounting substitute flange sleeve 1 for use in association with a heavy duty vehicle, chassis-mountable, data bus signal wiring harness coupling 2 which further includes a receptacle 3.

Receptacle 3 has a generally circular cross-section cylindrical body 4 and is adapted to be accommodated in longitudinal pass-through relation within a corresponding vehicle chassis mounting aperture 20 in a vehicle chassis 22 for mounting the coupling 2 to the vehicle chassis. Receptacle 3 also has a plurality of conductor-receiving, longitudinally-extending bores indicated generally by reference numeral 6, which are adapted to be selectively populated by data bus signal wiring and associated contact terminals with contact terminal fixture 3a, seal 3b and back collar 3c. The population of terminals variously corresponds in numbering and arrangement to a corresponding heavy duty vehicle's data bus data link connector. Note that receptacle 3 further includes openings (e.g. slots) 3f, in flange 3d—which in installations not requiring sleeve 1, correspond to vehicle chassis mounting holes and facilitate jointing of the receptacle 3 to the vehicle chassis (vehicle chassis mounting holes are not shown in FIG. 1 because they are lacking in this example of the vehicle chassis).

Sleeve 1 includes a center longitudinal axis 18. Sleeve 1 is adapted to be slidably mounted into cooperative engagement in conjoined, axially and radially fixed relation on receptacle 3 (see in particular, the assembly shown in FIG. 4) with the sleeve's flange 5 engagable in flange-matching chassis-secured relation adjacent the vehicle chassis mounting aperture 20 with the receptacle 3 supported thereby in pass-thru relation with the aperture 20 when the coupling 2 with sleeve 1 is mounted to vehicle chassis 22 as can be readily appreciated in the exploded perspective view of FIG. 1.

Diverse arrangements for mutually securing the sleeve to the receptacle are contemplated, and might include welding, chemical bonding, screws, or other such like. However, particular advantages accrue when the securing means comprises one or more pins 1a axially extending from sleeve 1 which are adapted to engage in conjoined axially and radially fixed relation with receptacle flange 3d. Pins 1a are advantageously arranged to engage in aligned locking registration through corresponding receptacle slots 3f, with tabs 1b as shown in FIGS. 1 and 4, extending in a non-axial and a non-radial direction with respect to the center longitudinal axis 18 of sleeve 1 and engaged in axial-withdrawal resisting relation against the rear side of flange 3d. This provision or cooperating mechanical members co-joins the sleeve 1 with receptacle 3 in a mutually fixed mechanical relation.

In the embodiment according to FIG. 1, sleeve 1 comprises flange 5 as a radially outward extension from the outer circumference of sleeve 1. Sleeve 1 also includes threads 10 arranged over at least a portion 11 of the outer circumferential surface of sleeve 1. Threads 10 are adapted for axially engaging a jam nut 23 in threaded relation thereon and co-operable therewith to secure the vehicle chassis 22 between the flange 5 and that nut 23.

FIGS. 2, 3 and the present disclosure in general, relate to alternative flange mounting for cylindrical receptacles, notionally referred to as Deutsch receptacles associated with their conventional use in heavy duty vehicles data communication links. These are often associated with various standards. SAE 31587 for example is a diagnostic protocol standard developed by the Society of Automotive Engineers (SAE) for heavy-duty and most medium-duty vehicles built after 1985. Up to 1995, individual OEMs used their own connectors. From 1996 to 2001, the 6-pin Deutsch was standard. Beginning in 2001, most OEMs converted to the 9-pin Deutsch. Some OEMs still use the 6-pin Deutsch. SAE 31708 is an SAE physical specification developed especially for heavy duty vehicles (trucks and buses). The protocol promoted a standard for serial communication between modules with microcontrollers. 31708 describes the physical and data link layer. Almost always used in conjunction with the application layer protocol SAE 31587. SAE 31939 In the early 90's, the SAE Truck and Bus Control and Communications Sub-committee started the development of a CAN-based application profile for in-vehicle communication in trucks. In 1998 the SAE published the 31939 set of specifications. A 31939 network connects electronic control units (ECU) within a truck and trailer system. The 31939 specification—with its engine, transmission, and brake message definitions—is dedicated to diesel engine applications. 31939 is intended to supplant 31587/31708 networks. SAE 31939 has been adopted widely by diesel engine manufacturers. One driving force behind this is the increasing adoption of the engine Electronic Control Unit (ECU), which provides one method of controlling exhaust gas emissions within US and European standards. Consequently, SAE 31939 can now be found in a range of diesel-powered applications: vehicles (on- and off-road), marine propulsion, power generation and industrial pumping. In this regard, examples of applicable receptacles would be those useful in 9 pin Deutsch 31939 type 1 or type 2 connector receptacles; 9 pin Deutsch PACCAR connector receptacles; 9 Pin Deutsch CAT industrial connector receptacles; 9 pin Deutsch SAE Standard Heavy Duty truck connector receptacles, as well as 6 pin Deutsch 31708/31587 heavy duty truck connector receptacles used in older truck models.

In particular, aspects relate to receptacles having integral flanges (see for example ref. numeral 3d with slots 3f), adapted for vehicle chassis mounting on receptacle flange compatible vehicles—but for which a sleeve arrangement is provided to facilitate alternative coupling mounting on such vehicle chassis through a flanged sleeve of a sleeve/receptacle combination for use on vehicles that are not otherwise receptacle flange compatible.

Referring still to FIGS. 2 and 3, there is shown perspective and elevated end plan views of receptacle 3. Note in particular the “twist-lock” features 14 (also referred to as “receptacle channel features” 14 or simply “-channel features” 14) of receptacles 3 in this embodiment. These are known features associated with Deutsch connectors commonly used for interfacing with vehicular diagnostic scan tools which have cooperative plugs adapted to engage with the receptacles that include a twist-lock collar and associated channel followers that bear against cam faces of channel feature 14 when the collar is twisted to ensure proper axial seating of the plug into the receptacle. The turning of the collar, in known manner, results in the application of torque to the receptacle. In accordance with one embodiment, receptacle 3 is adapted in known manner with channel features 14, including cam faces 14a and channel feature stops 14b. Corresponding, and also known, compatible plugs are axially seated into the receptacle by way of a rotating twist-lock collar (not shown) having channel cam followers (also not shown) within receptacle channel features 14. As a result of such rotation, the channel followers can act against a cam surface 14a of channel feature 14 of receptacles 3 to rotatingly leverage (draw) the plug into axial connected axial engagement with receptacle 3 with the channel cam followers ultimately bearing against the channel stop 14b. Torque exerted on the receptacle 3 in this way, must be resisted to prevent relative rotation between receptacle 3 and sleeves 1.

Referring now to FIG. 4, there is illustrated an elevated side view assembly of the embodiment shown in FIG. 2, in which sleeve 1 with flange 5 is shown positioned on receptacle 3. Coupling 2 includes sleeve 1 with flange 5 surrounding receptacle 3. Sleeve 1 may also include a flat 13. Flat 13 provides optional means for securing the sleeve in non-rotating relation relative to the vehicle chassis 22 having a correspondingly shaped aperture 20 and may also facilitate clearance for insertion of the sleeve into the vehicle chassis mounting aperture 20.

Sleeve 1 is shown in mounted relation with flange 5 on receptacle flange 3d, with a view of bores 6. Note in particular see FIG. 1 the representation of slotted key openings 3e in receptacle flange 3d. Slotted key openings 3e are advantageous in securing the aligned fit between sleeve 1 and receptacle 3 through a corresponding key (not shown) on flange 5, which is adapted to mechanically engage with slotted key opening 3e and amongst other things, resist torsional movement of sleeve 1 relative to receptacle 3 during connection/disconnection of the scan tool or other peripheral device.

In addition, in accordance with the illustrated arrangement of the elements as shown in FIG. 4, the torque mentioned above in relation to the seating of the compatible plug (by way of a rotating collar acting on a cam surface of said receptacle to rotating draw said plug into axial connected axial engagement with said receptacle, and wherein torque exerted by rotation of said collar during axial engagement thereof into said receptacle), urges the pins 1a against edges of the slots 3f in said relation therewith to generally prevent relative rotation between receptacle 3 and sleeve 1.

Referring now to FIG. 5, there is illustrated a coupling according to one embodiment in combination with a T or Y type wiring harness 24, connected at one end to a vehicle data link connector (DLC) not shown, that is associated with a vehicle's data bus 26. Coupling 2 is connected to a plug and associated diagnostic tool 27. The other branch of the wiring harness 24, is connected to an on-board telematics device 28 (often an after-market installation which is facilitated though the use of the multi-branched wiring harness 24).

Claims

1. A data communication receptacle, comprising: a receptacle body having a generally circular cross-section, the receptacle body adapted to pass-through a vehicle chassis mounting aperture in a vehicle chassis; and,an adapter formed as a sleeve having a complementary inner circumferential surface to the receptacle body and constructed and arranged to slidably fit about the receptacle body whereby the internal circumferential surface is in an abutting relation with the receptacle body, wherein the adapter is constructed and arranged to be secured to the receptacle body, the adapter being constructed and arranged to engage with the vehicle chassis to fix the data communication receptacle to the vehicle chassis.

2. The data communication receptacle according to claim 1, wherein the adapter is constructed and arranged to be axially secured to the receptacle body.

3. The data communication receptacle according to claim 1, further comprising a plurality of longitudinally-extending bores adapted to receive data bus signal wiring and associated contact terminals.

4. The data communication receptacle according to claim 1, wherein the receptacle body includes a cam surface configured to rotatingly draw a plug into axial engagement with the receptacle.

5. The data communication receptacle according to claim 1, further comprising a key and slot coupling constructed and arranged to secure an aligned fit between the adapter and the receptacle body to resist torsional movement of the adapter relative to the receptacle body.

6. The data communication receptacle according to claim 5, wherein the receptacle body includes the slot and the adapter includes the key.

7. The data communication receptacle according to claim 5, wherein the adapter is constructed and arranged to be axially secured to the receptacle body.

8. The data communication receptacle according to claim 1, wherein the adapter includes an outer circumferential surface having a threaded section.

9. The data communication receptacle according to claim 8, further comprising a lock nut engageable with the threaded section.

10. The data communication receptacle according to claim 8, wherein the outer circumferential surface includes a flat section.

11. The data communication receptacle according to claim 1, wherein the adapter includes an outer circumferential surface and an adapter flange radially outwardly extending from the outer circumference.

12. The data communication receptacle according to claim 11, wherein the receptacle body includes a receptacle mounting flange and wherein the adapter flange is constructed and arranged to abut the receptacle mounting flange.

13. A data communication receptacle, comprising: a receptacle body having a generally circular cross-section, the receptacle body adapted to pass-through a vehicle chassis mounting aperture in a vehicle chassis;an adapter formed as a sleeve having a complementary inner circumferential surface to the receptacle body and constructed and arranged to slidably fit about the receptacle body whereby the internal circumferential surface is in an abutting relation with the receptacle body, wherein the adapter is constructed and arranged to be axially secured to the receptacle body, the adapter being constructed and arranged to engage with the vehicle chassis to fix the data communication receptacle to the vehicle chassis, the adapter including an outer circumferential surface and an adapter flange radially outwardly extending from the outer circumference; and,a key and slot coupling constructed and arranged to secure an aligned fit between the adapter and the receptacle body to resist torsional movement of the adapter relative to the receptacle body.

14. The data communication receptacle according to claim 13, wherein the receptacle body includes the slot and the adapter includes the key.

15. The data communication receptacle according to claim 13, further comprising a plurality of longitudinally-extending bores adapted to receive data bus signal wiring and associated contact terminals.

16. The data communication receptacle according to claim 13, wherein the receptacle body includes a cam surface configured to rotatingly draw a plug into axial engagement with the receptacle.

17. A wiring harness for coupling to a vehicle data bus, the wiring harness comprising: a first branch, a second branch and a third branch;a first connector attached to the first branch;a second connector attached to the second branch; and,a third connector attached to the third branch, the third connector comprising a data communication receptacle, the data communication receptacle comprising: a receptacle body having a generally circular cross-section, the receptacle body adapted to pass-through a vehicle chassis mounting aperture in a vehicle chassis; and,an adapter formed as a sleeve having a complementary inner circumferential surface to the receptacle body and constructed and arranged to slidably fit about the receptacle body whereby the internal circumferential surface is in an abutting relation with the receptacle body, the adapter is constructed and arranged to be secured to the receptacle body, the adapter being constructed and arranged to engage with the vehicle chassis to fix the data communication receptacle to the vehicle chassis.

18. The wiring harness according to claim 17, wherein the first connector is configured to connect to a vehicle data bus.

19. The wiring harness according to claim 17, wherein the second connector is configured to connect to a telematics device.

20. The wiring harness according to claim 17, wherein the third connector is configured to connect to a diagnostic scanner.

21. The wiring harness according to claim 17, wherein the first connector is configured to connect to a vehicle data bus, the second connector is configured to connect to a telematics device, and the third connector is configured to connect to a diagnostic scanner.

22. The wiring harness according to claim 17, wherein the adapter is constructed and arranged to be axially secured to the receptacle body.

23. The wiring harness according to claim 17, wherein the data communication receptacle further comprises a plurality of longitudinally-extending bores adapted to receive data bus signal wiring and associated contact terminals.

24. The wiring harness according to claim 17, wherein the receptacle body includes a cam surface configured to rotatingly draw a plug into axial engagement with the receptacle.

25. The wiring harness according to claim 17, further comprising a key and slot coupling constructed and arranged to secure an aligned fit between the adapter and the receptacle body to resist torsional movement of the adapter relative to the receptacle body.

26. The wiring harness according to claim 25, wherein the receptacle body includes the slot and the adapter includes the key.

27. The wiring harness according to claim 25, wherein the adapter is constructed and arranged to be axially secured to the receptacle body.

28. The wiring harness according to claim 17, wherein the adapter includes an outer circumferential surface having a threaded section.

29. The wiring harness according to claim 28, further comprising a lock nut engageable with the threaded section.

30. The wiring harness according to claim 28, wherein the outer circumferential surface includes a flat section.

31. The wiring harness according to claim 17, wherein the adapter includes an outer circumferential surface and an adapter flange radially outwardly extending from the outer circumference.

32. The wiring harness according to claim 31, wherein the receptacle body includes a receptacle mounting flange and wherein the adapter flange is constructed and arranged to abut the receptacle mounting flange.

33. A kit of parts, comprising: a data communication receptacle including a receptacle body having a generally circular cross-section, the receptacle body adapted to pass-through a vehicle chassis mounting aperture in a vehicle chassis; and,a plurality of different adapters, each adapter being formed as a sleeve having a complementary inner circumferential surface to the receptacle body and constructed and arranged to slidably fit about the receptacle body whereby the internal circumferential surface is in an abutting relation with the receptacle body, wherein each adapter is constructed and arranged to be secured to the receptacle body, at least one adapter being constructed and arranged to engage with the vehicle chassis to fix the data communication receptacle to the vehicle chassis.

34. The kit according to claim 33, wherein at least one adapter is constructed and arranged to be axially secured to the receptacle body.

35. The kit according to claim 33, wherein each adapter includes an outer circumferential surface and each adapter includes an adapter flange radially outwardly extending from the outer circumference.

36. The kit according to claim 33, further comprising a key and slot coupling constructed and arranged to secure an aligned fit between each adapter and the receptacle body to resist torsional movement of the adapter relative to the receptacle body.

37. The kit according to claim 36, wherein the receptacle body includes the slot and each adapter includes the key.

38. The kit according to claim 36, wherein at least one adapter is constructed and arranged to be axially secured to the receptacle body.

39. The kit according to claim 33, wherein at least one adapter includes an outer circumferential surface having a threaded section.

40. The kit according to claim 39, further comprising a lock nut engageable with the threaded section.

41. The kit according to claim 39, wherein the outer circumferential surface includes a flat section.

42. The kit according to claim 33, further comprising a wiring harness for coupling to a vehicle data bus, the wiring harness comprising a first branch, a second branch and a third branch, a first connector is attached to the first branch, a second connector is attached to the second branch and a third connector is attached to the third branch, the third connector comprising the data communication receptacle.

43. The kit according to claim 42, wherein the first connector is configured to connect to a vehicle data bus, the second connector is configured to connect to a telematics device, and the data communication receptacle is configured to connect to a diagnostic scanner.

44. A method of installing a data communication receptacle to a vehicle chassis, the method comprising: providing a data communication receptacle including a receptacle body having a generally circular cross-section;providing a plurality of different adapters, each adapter being formed as a sleeve having a complementary inner circumferential surface to the receptacle body;slidably fitting one of the plurality of different adapters about the receptacle body whereby the internal circumferential surface is in an abutting relation with the receptacle body;securing the one of the plurality of different adapters to the receptacle body; andsecuring the one of the plurality of different adapters to the vehicle chassis to fix the data communication receptacle to the vehicle chassis.

45. The method according to claim 44, aligning a key and slot coupling the one of the plurality of different adapters and the receptacle body to resist torsional movement of one of the plurality of different adapters relative to the receptacle body.

46. The method according to claim 44, further comprising: providing a wiring harness for coupling to a vehicle data bus, the wiring harness having a first branch, a second branch and a third branch, a first connector is attached to the first branch, a second connector is attached to the second branch and the data communication receptacle is attached to the third branch;connecting the first connector to the vehicle data bus; andconnecting the second connector to a telematics device;wherein securing the one of the plurality of adapters to the vehicle chassis to fix the data communication receptacle to the vehicle chassis comprises securing the one of the plurality of adapters to the vehicle chassis such that the data communication receptacle is connectable to a diagnostic scanner.

47. The method according to claim 44, wherein at least one of the plurality of different adapters includes an outer circumferential surface having a threaded section.

48. The method according to claim 47, securing the one of the plurality of adapters to the vehicle chassis comprises engaging a lock nut with the threaded section.

49. A method of installing a data communication receptacle to a vehicle chassis, the method comprising: providing a data communication receptacle including a receptacle body having a generally circular cross-section;providing a plurality of different adapters, each adapter being formed as a sleeve having a complementary inner circumferential surface to the receptacle body;slidably fitting one of the plurality of different adapters about the receptacle body whereby the internal circumferential surface is in an abutting relation with the receptacle body;securing the one of the plurality of different adapters to the receptacle body; andsecuring the one of the plurality of different adapters to the vehicle chassis to fix the data communication receptacle to the vehicle chassis; and,passing the receptacle body through a vehicle chassis mounting aperture in the vehicle chassis.

50. The method according to claim 49, wherein securing the one of the plurality of different adapters to the receptacle body comprises axially securing the one of the plurality of different adapters to the receptacle body.

51. A method of installing a data communication receptacle to a vehicle chassis, the method comprising: providing a data communication receptacle including a receptacle body having a generally circular cross-section;providing a plurality of different adapters, each adapter being formed as a sleeve having a complementary inner circumferential surface to the receptacle body;slidably fitting one of the plurality of different adapters about the receptacle body whereby the internal circumferential surface is in an abutting relation with the receptacle body;securing the one of the plurality of different adapters to the receptacle body; andsecuring the one of the plurality of different adapters to the vehicle chassis to fix the data communication receptacle to the vehicle chassis,wherein providing a plurality of different adapters comprises providing a plurality of different adapters each having an adapter flange radially outwardly extending from an outer circumference of a respective adapter, and wherein securing the one of the plurality of adapters to the vehicle chassis comprises engaging the adapter flange with the vehicle chassis adjacent a vehicle chassis mounting aperture in the vehicle chassis.