DOOR HINGE LIMITER FOR AUTOMOTIVE VEHICLE

Abstract

Disclosed is a door hinge limiting assembly for a motor vehicle comprising a pillar bracket, a door bracket, and a flexible check strap. The pillar bracket is configured to fit on the aft-side and interior-side of the door pillar and to complement the pillar's nonplanar profile. Rather than being secured to the door pillar, the pillar bracket is secured to the forward wall in the footwell region, with the aforesaid configuration producing an interference fit with the door pillar. The strap may be comprised of nylon webbing or similar material, and in some embodiments may comprise an elastic strap to promote convenient folding.

Description

BACKGROUND OF THE INVENTION

Front doors of motor vehicles are usually hinged to the door pillar. Typically a hinge limiter such as a check arm is installed at the factory to prevent hyperextension of the door upon opening beyond design limits. However, many users complain that factory door hinge limiters are inadequate and subject to failure. Hyperextension can occur, for example, if a person opens the door too quickly or with excessive momentum, or if wind catches an open door. Hyperextension is particularly a problem with smaller commercial vehicles, such as smaller panel vans, including the Dodge Ram ProMaster van. These vans are more susceptible to hyperextension due to a combination of lighter doors, lighter/smaller hinge hardware (including factory door check arms), thinner steel at the door pillar, frequent door openings, and less-than-careful drivers. Other hinge limiters including factory door check arms frequently fail, causing substantial damage to the door and external features of the vehicle.

What is needed is a door hinge limiter that is affordable, easy to install, and works well under real-world conditions.

BRIEF SUMMARY OF THE INVENTION

Disclosed is a door hinge limiting assembly comprising a pillar bracket, a door bracket, and a flexible check strap. In one embodiment, the pillar bracket is configured to wrap around a portion of the door pillar being fabricated to complement the pillar's nonplanar profile. Rather than being secured to the door pillar, the pillar bracket is secured to the body of the vehicle, preferably in the footwell region. The strap may be comprised of nylon webbing or similar material, and in some embodiments may comprise an elastic strap to promote convenient folding.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

These and other features and advantages of the present invention will become more readily appreciated when considered in connection with the following detailed description and appended drawings, wherein:

FIG. 1 is a drawing of door pillar damage after violent hyperextension.

FIG. 2 is a perspective view of one embodiment of the hinge limiter assembly.

FIG. 3 is a view of one embodiment of the hinge limiter assembly installed in a motor vehicle.

FIG. 4 (views A-D) are perspective, front, side, and top views of one embodiment of the invention.

FIG. 5 is a perspective view of a check strap and attached fold promoter.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the figures, wherein like numerals indicate like or corresponding parts throughout the several views, FIG. 1 shows damage 16 to a door pillar 10 caused by hyperextension, such as when door 26 is violently opened or caught by a wind gust. Hinge assembly 12 (one of a pair of drive door hinge assemblies) remains attached to door 26, but hyperextension has caused the hinge assembly to detach from door pillar 10, leaving a fragment of the steel door pillar 14 dangling from hinge assembly 12. Damage 16 may include breakage and/or stripping of wire harness 22, as well as damage to protective wire harness boot 24. Such damage is frequently expensive to repair and may impose costly downtime.

FIG. 2 shows one embodiment of a hinge limiter assembly 30. The assembly comprises a check strap 32 having a door end 34 and a body end 36. Check strap 32 is sized to appropriate length to allow door 26 to open sufficiently to allow convenient user ingress and egress, but short enough to prevent hyperextension of the door hinges and any factory check arm. In some embodiments check strap 32 is between four and ten inches long, and in a preferred embodiment check strap 32 is about seven inches long. The check strap is preferably bendable at one or more locations along its length and may be comprised of any suitable sturdy material, such as nylon webbing or other sturdy fabric, but could be comprised of cable, rope, chain, pivoting rigid sections, or any combination of the foregoing in materials such as steel, nylon, rayon, or other materials known in the art. In one embodiment check strap 32 may comprise a closed end loop 38 at either or both ends for conveniently securing the check strap to door bracket 40 and/or pillar bracket 50. Check strap 32 may be secured to either or both brackets using check strap securing means 44 of any type such as with a bolt and washer (pictured), metal pin, screws, rivets, welding, adhesives, or other securing means well known in the art.

As illustrated in FIG. 5, in some embodiments check strap 32 may comprise a fold promoter 80. Fold promoter 80 may comprise an elastic material which may be sewn to the forward facing side 82 of check strap 32 (the side oriented towards the front of the vehicle) in order to promote check strap to fold/collapse with the folded edge oriented towards the rear of the vehicle. In a preferred embodiment, the user would see mainly the rearward facing side 84 of check strap 32. In other embodiments fold promoter 80 may comprise a spring that is secured within or on check strap 32, such as a thin piece of bent spring steel.

Returning to FIG. 2, hinge limiter assembly 30 may comprise a door bracket 40 attachable to door 26, preferably to a sturdy portion of the metal frame or panel facing inward toward the passenger cabin. In many or perhaps most applications, the most convenient mounting location for door bracket 40 may be covered with door trim, such as plastic, vinyl or upholstery. In some cases door bracket 40 may be installed directly on top of such trim, while in other cases it is preferable to remove some of the trim to expose the metal before securing the door bracket 40.

In other applications, hinge limiter assembly 30 may not comprise a door bracket; rather, check strap 32 may be secured directly to a portion of door 26 without use of a separate door bracket. For example, a door may be fabricated with features as original equipment that incorporates some of the same functions as the door bracket 40 depicted in FIG. 2, or integrate a mechanism to secure check strap 32 into door 26 without the necessity of a separate door bracket, e.g. at time of door/vehicle manufacture, such as preformed in a door panel or otherwise attached, such as with welding or bolts, etc.

In applications where a door bracket is desirable, the bracket is preferably rigid and more preferably metal. In one embodiment, door bracket 40 has opposing flanges 42 configured to accommodate the door-end 34 of check strap 32 and check strap securing means 44. In a preferred embodiment, flanges 42 are oriented approximately 90 degrees from the door bracket attachment surface. The attachment surface may be flat and comprise a plurality of holes to accommodate bracket attachment means 46, which may be bolts with nuts (shown), self-tapping bolts, screws, rivets, welds, adhesives, or other means well known in the art. In one embodiment, each of two opposing flanges 42 has a hole sized to accept check strap securing means 44, such as a pin or a bolt (shown) which may or may not also comprise a nut (shown). Check strap securing means 44 could also could comprise screws, weld, adhesive, hooks, tabs, a buckle, or other well-known securing means. In the embodiment shown, flanges 42 are configured to accept a pin or bolt that is generally vertically oriented.

Hinge limiter assembly 30 may comprise pillar bracket 50 attachable to the motor vehicle body. Pillar bracket 50 may optionally attach to the door pillar 10. FIG. 3 shows an embodiment where pillar bracket 50 is secured to the vehicle body's footwell region 70. For purposes of this specification and the claims, “footwell region” refers to those portions of the vehicle body that are immediately adjacent to and forward of door pillar 10 (hidden in FIG. 3 by sill trim 18) and including the floor 74 underneath the occupant's feet and further including forward wall 72, and further including the inward-facing portion of door pillar-10, i.e., those physical vehicle body parts forward of the leading edge of door 26 that partially define the space in which an occupant would normally place his/her feet while traveling. “Footwell region” does not include the airspace itself, nor the aft-facing side of door pillar 10, nor other portions of the vehicle body aft of door pillar 10. In most motor vehicles, forward wall 72 rises from floor 74 at a forward slant, roughly transverse to the line of vehicle travel. Forward wall 72, depending on the configuration of the vehicle, may also serve as a firewall between the occupancy area and the engine compartment or bulkhead.

Pillar bracket 50 is preferably comprised of a strong and stiff material such as metal and preferably steel. The bracket may be a unitary piece of metal or comprised of separate pieces welded or fastened together. In a preferred embodiment, pillar bracket 50 is a unitary piece of 3/16″ (0.1875″) thick steel alloy, such as is 1018 cold rolled steel, configured with dimensions complementing those of the vehicle body proximate to the attachment and abutment locations.

Pillar bracket 50 may be comprised of three regions: a check strap securement region 52 configured to accommodate one end of check strap 32; a body attachment region 56 configured to attach the pillar bracket to the vehicle body; and an intermediate region 54 extending between check strap securement region 52 and body attachment region 56. As best shown in FIGS. 4B and 4D, check strap securement region 52 has a pillar abutment surface 60 that is configured to abut door pillar 10 when pillar bracket 50 is installed on a motor vehicle, as depicted in FIG. 3. Similar to the means for securing door end 34 of check strap 32 to door bracket 40, check strap securement region 52 may comprise two opposing pillar bracket flanges 58 configured to accommodate and secure the body end 36 of check strap 32. Body end 36 of check strap 32 may be secured to pillar bracket 50 in check strap securement region 52 using any of the check strap securing means 44 described above, such as a bolt and nut (pictured), pin, etc. Similarly, pillar bracket flanges 58 may be oriented 90 degrees from pillar abutment surface 60. In one embodiment, pillar bracket flanges 58 extend about 1.75 inches measured from pillar abutment surface 60.

The other end of pillar bracket 50 comprises body attachment region 56. Body attachment region 56 may have a generally flat planar surface, which surface may comprise one or more holes configured to receive bracket attachment means 46 including one or more fasteners such bolts and nuts (pictured), self-tapping screws, rivets, and the like. Pillar bracket 50 may also be attached to the motor vehicle body at the body attachment region 56 using welding, adhesives, or other attachment techniques not requiring a fastener.

Pillar bracket 50 is configured to attach to the vehicle body in a convenient location other than (or in addition to) attachment to door pillar 10. In a preferred embodiment, the body attachment region 56 of pillar bracket 50 is configured to attach to the vehicle body at a location in footwell region 70, as defined above. Hinge limiter assembly 30, together with pillar bracket 50 may be attached to the vehicle body by a user after acquiring purchase as an “after-market” item, or the hinge limiter assembly, including pillar bracket 50, may be included as part of the vehicle's body as original equipment or otherwise integrated into the body, e.g., pillar bracket 50 “pre-attached” such as with welding or bolts, etc. or otherwise formed in footwell region 70 at time of first sale. In the embodiment shown in FIGS. 2-4, body attachment region 56 is configured to attach to forward wall 72 in a Dodge Pro Master motor vehicle, though Applicant believes his invention can be readily adapted to other models. In one embodiment, pillar bracket 50 is configured to be attached to the forward wall 72. In another embodiment, pillar bracket 50 is configured to be attached to the floor 74 of footwell region 70. Body attachment region 56 may comprise a plurality of holes sized to receive bracket attachment means 46, such as ⅜″ diameter bolts with matching locknuts. Pillar bracket 50 may be attached so that the abutment surface of body attachment region 56 is installed directly against the vehicle's metal body or installed on top of any carpet, upholstery or trim that may cover structural body components in footwell region 70.

Intermediate region 54 of pillar bracket 50 extends from the check strap securement region 52 to body attachment region 56. Door pillars have a three-dimensional shape and though they may be relatively weak when subjected to highly concentrated lateral stress, such as encountered in a violent door opening, are generally strong in the columnar direction for strength and rigidity as in case of a roll-over accident, etc. The “profile” of door pillar 10 as used herein means the shape and dimensions of its outer surface, such as evidenced by its section profile when the pillar is cut by a series of imaginary planes transverse to the column orientation. The “profile” is not necessarily that originally supplied by the manufacturer. In some cases, a user may modify the door pillar 10 to modify its profile in the area where pillar bracket 50 is to be installed. For example, installation of pillar bracket 50 may be facilitated by eliminating any substantial protrusion originally manufactured along the door pillar 10 or in the nearby footwell region 70, such as a tab designed to assist in securing a wire harness 22, or a seam where two formed sheets of steel are joined. In some cases, for example, it may be preferable to eliminate a protrusion (or a portion of a larger protrusion) such as resulting from a wire harness tab, pinch weld, or from a seam on or near door pillar 10, to facilitate installation of hinge limiter assembly 30, pillar bracket 50, and/or weather strip 20. In the case of the Ram Pro Master vehicle, for example, an OEM wire harness tab protrusion is preferably hammered over to lay flat against the surface of the pillar to facilitate a good fit of pillar bracket 50 with the dimensions shown in the figures. “Profile” as used herein means the profile of the door pillar accepting attachment of pillar bracket 50, regardless whether the door pillar surface has been modified from its original profile.

The door pillar profile will be nonplanar as one traces around door pillar 10 from its aft side to the side facing the vehicle's interior, and possibly continuing a short distance around the door pillar away from the vehicle interior (i.e., toward the outside of the vehicle). The surface profile of the door pillar may be relatively simple (e.g. essentially a generally vertical column having generally flat sides) or feature more complex surface variants, including a plurality of planes, curves, bends and other nonplanar surface shapes depending on the original manufacturer's design (and any post-manufacture alteration as discussed above).

In one embodiment illustrated in FIGS. 2-4, check strap securement region 52 abuts the aft side of door pillar 10 at pillar abutment surface 60. Pillar bracket 50 then transitions into the intermediate region 54 which wraps forward and partially around door pillar 10. The substrate in intermediate region 54 is angled at a plurality of locations to complement the nonplanar profile of door pillar 10 and the surface profile of footwell region 70 forward of door pillar 10, including the forward wall 72 and any transition region between door pillar 10 and forward wall 72. The pillar bracket 50 may comprise a plurality of bends at a plurality of locations in intermediate region 54, and may also comprise one or more bends at a compound angle within intermediate region 54.

The pillar bracket 50 depicted in FIG. 4, for example, comprises a unitary metal substrate of uniform thickness bent at three locations within the intermediate region 54. Referring to FIG. 4B, intermediate region 54 is angled approximately 90 degrees relative to body attachment region 56, whose generally planar surface defines a first axis. Intermediate region 54 then changes direction at angle α relative to the first axis. As best seen in FIGS. 4B and 4C, this second bend is made at a compound angle, such that intermediate region 54 is also bent at angle θ relative to a second axis orthogonal to the first axis. In one embodiment, angle α is about 19° relative to the first axis, i.e. between 16° and 22° relative to the first axis. In the same embodiment, angle θ is about 12.5° relative to the second axis, i.e. between 9.5° and 15.5° relative to the second axis.

Intermediate region 54 is thus configured to complement the surface dimensions and nonplanar profile of door pillar 10 of the relevant motor vehicle. Preferably, all three regions of pillar bracket 50 complement the pillar's aft and inward-facing surfaces, as well as the surface profile of footwell region 70 that is immediately adjacent to door pillar 10. In some embodiments a plurality of angles and related dimensions will be necessary to appropriately complement the vehicle body surfaces in the transition area between door pillar 10 and forward wall 72. In the embodiment shown in the figures, pillar bracket 50 is not fastened to pillar bracket 10; rather, pillar bracket 50 is fastened to the body only in the footwell region. Thus in the illustrated embodiment, no holes or other means of attaching pillar bracket 50 to the vehicle body are present in either intermediate region 54 or pillar abutment surface 60; rather, the surfaces of intermediate region 54 and pillar abutment surface are smooth and uninterrupted by holes. In the shown embodiment, other than a friction interference fit, pillar bracket 50 is not secured or attached to pillar bracket 10.

When thus configured, pillar bracket 50 may be securely attached to the footwell region distant from the door pillar while exploiting the convenient position and available strength of door pillar 10 by virtue of an interference fit along most or all of intermediate region 54 with door pillar 10 and body structure in its proximity. By virtue of the described design, force of a violent door opening is transferred through check strap 32 to (a) the footwell region 70 where pillar bracket 50 is attached and (b) laterally towards the inward-facing surface of door pillar 10 over a relatively large surface area by virtue of the interference fit, rather than pulling away from door pillar 10 at a few hinge assembly 12 attachment points as depicted in FIG. 1.

In most embodiments, installation of hinge limiter assembly 30 will not interfere with reinstallation of OEM weather strip 20. By modestly trimming a few inches of OEM sill trim 18, the embodiment shown in the figures permits sill trim 18 to be reinstalled over most of the check strap securement region 52 and intermediate region 54. A substantial portion of check strip securement region 52, including pillar bracket flanges 58, are configured to fit underneath the original cavity between door pillar 10 and sill trim 18 as originally manufactured, thus minimizing intrusion of the assembly into the passenger cabin and providing an aesthetically clean look, as shown in FIG. 3.

The foregoing invention has been described in accordance with the relevant legal standards, thus the description is exemplary rather than limiting in nature. Variations and modifications to the disclosed embodiment may become apparent to those skilled in the art and fall within the scope of the invention. Furthermore, particular features of one embodiment can replace corresponding features in another embodiment or can supplement other embodiments unless otherwise indicated by the drawings or this specification.

Claims

1. A hinge limiter assembly for a motor vehicle, the vehicle having a door hingeably attached to the vehicle body at a door pillar having a nonplanar profile, the body comprising a footwell region partially defined by the door pillar, a floor, and a forward wall, the assembly comprising: a check strap for connecting the body and the door; anda pillar bracket attachable to the body, said pillar bracket comprising a check strap securement region configured to accommodate one end of the check strap, a body attachment region configured for secure attachment to the body, and an intermediate region extending from the check strap securement region to the body attachment region, wherein the intermediate region is nonplanar and configured to complement the nonplanar profile of the door pillar.

2. The assembly of claim 1, wherein the body attachment region is configured for attachment in the footwell region at a location forward of the door pillar.

3. The assembly of claim 2, wherein the body attachment region is configured for attachment to the forward wall.

4. The assembly of claim 2 wherein the intermediate region is configured to complement any nonplanar surface variability between the door pillar and the attachment location forward of the door pillar.

5. The assembly of claim 1, wherein the check strap securement region comprises a pillar abutment surface and wherein both the pillar abutment surface and the intermediate region are formed without holes for accepting a fastener.

6. A hinge limiter assembly for a motor vehicle, the vehicle having a door hingeably attached to the vehicle body at a door pillar having a nonplanar profile, the body comprising a footwell region partially defined by the door pillar, a floor, and a forward wall, the assembly comprising: a check strap for connecting the body and the door; anda pillar bracket attachable to the body, said pillar bracket comprising a strap attachment region configured to accommodate one end of the check strap, a body attachment region configured for secure attachment to the body, and an intermediate region extending from the strap attachment region to the body attachment region, wherein the pillar bracket is configured for attachment at a location on the body that is not the door pillar.

7. The assembly of claim 6, wherein the pillar bracket is configured to be unattached at the door pillar.

8. The assembly of claim 6, wherein the pillar bracket is configured for attachment to the forward wall.

9. The assembly of claim 8, wherein the intermediate region is nonplanar and comprises a plurality of angles including at least one compound angle.

10. The assembly of claim 9, wherein the intermediate region is configured to complement the nonplanar profile of the door pillar.

11. The assembly of claim 10, wherein the intermediate region is configured to complement the surface profile of a transition region between the door pillar and the forward wall.

12. A hinge limiter assembly for a motor vehicle, the vehicle having a door hingeably attached to the vehicle body at a door pillar, the door pillar having a nonplanar profile, and the body comprising a footwell region partially defined by the door pillar, a floor, and a forward wall, the assembly comprising: a check strap having two ends;a door bracket configured for attachment to the door and for securing one end of the check strap;a pillar bracket configured for securing the other end of the check strap and for attachment to the body in the footwell region other than the door pillar.

13. The assembly of claim 12 wherein the pillar bracket comprises an intermediate region having a plurality of angles including at least one compound angle to approximately complement the door pillar's nonplanar profile.

14. The assembly of claim 13, wherein the pillar bracket comprises a metal that is bent at a plurality of locations along the intermediate region.

15. The assembly of claim 14, wherein the pillar bracket further comprises a body attachment region and a check strap securement region with the intermediate region extending therebetween, the body attachment region defining a first axis, and wherein the metal of the intermediate region is bent at a first location approximately 90 degrees relative to the first axis, is bent approximately 19 degrees at a second location relative to the first axis, and is bent approximately 13 degrees at a third location relative to a second axis that is orthogonal to the first axis.

16. The assembly of claim 12, wherein the pillar bracket comprises a substantially planar body attachment region configured for attachment to the forward wall.

17. The assembly of claim 12, wherein the motor vehicle comprises sill trim covering some or all of the door pillar, and wherein the pillar bracket comprises a check strap securement region sized to be substantially hidden underneath the sill trim.

18. The assembly of claim 17 wherein the check strap securement region comprises a pillar abutment surface and a pair of flanges that extend approximately 1.75 inches away from the pillar abutment surface.

19. The assembly of claim 12, wherein the check strap has a forward side configured for facing the front of the vehicle and a rearward side configured for facing the rear of the vehicle, and further comprising a means for promoting folding of the check strap when the door is closed.

20. The assembly of claim 19 wherein the means of promoting folding comprises elastic sewn on the forward facing side.