WO2017059330A1 - Procédés et appareil pour monter de façon coulissante une jupe de remorque - Google Patents

Procédés et appareil pour monter de façon coulissante une jupe de remorque Download PDF

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Publication number
WO2017059330A1
WO2017059330A1 PCT/US2016/054947 US2016054947W WO2017059330A1 WO 2017059330 A1 WO2017059330 A1 WO 2017059330A1 US 2016054947 W US2016054947 W US 2016054947W WO 2017059330 A1 WO2017059330 A1 WO 2017059330A1
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WO
WIPO (PCT)
Prior art keywords
skirt
trailer
supporting member
channel
bending
Prior art date
Application number
PCT/US2016/054947
Other languages
English (en)
Inventor
Philippe Macherel
Calvin Rhett Bradley
David C. LUNG
Larry Satterfield
Original Assignee
Compagnie Generale Des Etablissements Michelin
Michelin Recherche Et Technique S.A.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from PCT/US2015/065236 external-priority patent/WO2017058271A1/fr
Application filed by Compagnie Generale Des Etablissements Michelin, Michelin Recherche Et Technique S.A. filed Critical Compagnie Generale Des Etablissements Michelin
Priority to JP2018516854A priority Critical patent/JP2018529575A/ja
Priority to EP16790458.0A priority patent/EP3356210B1/fr
Priority to CA3000007A priority patent/CA3000007C/fr
Priority to MX2018003924A priority patent/MX2018003924A/es
Priority to CN201680056940.XA priority patent/CN108473163B/zh
Priority to AU2016331201A priority patent/AU2016331201B2/en
Priority to US15/764,807 priority patent/US10577033B2/en
Publication of WO2017059330A1 publication Critical patent/WO2017059330A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D35/00—Vehicle bodies characterised by streamlining
    • B62D35/001—For commercial vehicles or tractor-trailer combinations, e.g. caravans

Definitions

  • This invention relates generally to towable trailers, and more specifically to aerodynamic improvements to skirts for towable trailers.
  • Trailers towed by trucks and similar apparatuses for transporting cargo can be large, unwieldy, and include geometries which invite inefficiencies during travel.
  • One aspect of these inefficiencies concerns the aerodynamics of the trailer.
  • trailers have been built, supplemented, or retro-fitted with trailer skirts (or side skirts), devices affixed to the underside which limit air circulating in the empty space between the trailer's axles.
  • skirts or side skirts
  • drag caused by turbulence is reduced.
  • the reduction in drag permits the trailer to be towed more efficiently, increasing the gas mileage and performance of the vehicle and its cargo.
  • the skirt is either too flexible and not holding its shape or being too rigid and non-resilient when encountering objects or ground-features that may impact the skirt, which may result in damage to the skirt and/or the trailer. Accordingly, there is a need to provide a skirt that is compliant and resilient.
  • the present invention includes methods and apparatus for attaching a trailer skirt to a trailer.
  • Embodiments of the methods include attaching a skirt-supporting member to a trailer in a cantilevered configuration, and operably coupling a trailer skirt to the skirt-supporting member, the coupling being a sliding coupling between the trailer skirt and the skirt- supporting member permitting sliding of the trailer skirt relative to the skirt- supporting member when the trailer skirt bends.
  • Embodiments of the apparatus provide a trailer-skirt coupling apparatus including a trailer mounting bracket configured for mechanically coupling the apparatus to a trailer, a skirt-supporting member operably attached to the trailer mounting bracket in a cantilevered configuration, and a skirt channel configured to slidingly couple the skirt- supporting member to a trailer skirt and thereby permit sliding of the trailer skirt relative to the skirt- supporting member when the trailer skirt bends.
  • FIG. 1 is a perspective view of a trailer having a trailer skirt attached by the techniques disclosed herein, in accordance with an embodiment of the invention.
  • FIG. 2 is an interior side view of the trailer skirt shown in FIG. 1, in accordance with an exemplary embodiment of the invention.
  • FIG. 3A is a front view of a trailer-skirt coupling apparatus for mounting a trailer skirt to a trailer, in accordance with an embodiment of the invention.
  • FIG. 3B is a side view of the trailer-skirt coupling apparatus shown in FIG.
  • FIG. 3C is a bottom view of the trailer-skirt coupling apparatus shown in FIG. 3A.
  • FIG. 3D is a top view of the trailer-skirt coupling apparatus shown in FIG.
  • FIG. 4A is a side view of the trailer-skirt coupling apparatus shown in FIG. 3B attached to a trailer skirt, each of which are shown in a bent and buckled configuration, in accordance with an embodiment of the invention.
  • FIG. 4B is a sectional view taken from FIG. 4A along line 4B-4B, showing the bi-modulus bending member with each elongate bending element in a buckled configuration, in accordance with an embodiment of the invention.
  • FIG. 5 is a bottom view of a trailer-skirt coupling apparatus having a bi- modulus bending member including an asymmetrical arrangement of elongate bending elements, in accordance with another exemplary embodiment of the invention.
  • FIG. 6A is a sectional view of an elongate bending element for use in forming a bi-modulus bending member in accordance with another embodiment of the invention.
  • FIG. 6B is a sectional view of an elongate bending element for use in forming a bi-modulus bending member in accordance with another embodiment of the invention.
  • FIG. 7 is a graph showing the test results of the bracket of the current application as compared to prior art brackets.
  • Trailer skirts are frequently constructed of inelastic materials, such as plastic, metal, or fiberglass.
  • the trailer and vehicle towing the trailer maintain a level of ground clearance above the ground and debris or obstacles which might damage their construction.
  • a trailer skirt in contrast, it designed to consume much of this ground clearance to improve the aerodynamic performance of the trailer during operation, by altering the airflow to reduce turbulence and drag that otherwise negatively impact fuel consumption and other performance measures.
  • Embodiments of the present invention provide methods for mounting a trailer skirt to a trailer, and trailer-skirt coupling apparatuses for achieving this purpose.
  • skirt-supporting member may comprise any structure extending between the trailer and the skirt, and which is operably attached to the skirt.
  • the skirt-supporting member may comprise a rigid or flexible member, may be elongate, and can be attached to the skirt using any desired mechanism, such as by use of one or more fasteners, weldments, adhesives, clamps, and/or mounting brackets, for example. It is appreciated that the step of attaching may include attaching the skirt-supporting member to a trailer in a cantilevered configuration.
  • the skirt- supporting member comprises a bi-modulus bending member
  • the step of attaching comprises attaching a bi-modulus bending member to a trailer in a cantilevered configuration.
  • the bi-modulus bending member (or more generally the skirt-supporting member) may be fixedly attached at any point along its length, including at a terminal end thereof.
  • the bending member may be attached in any desired manner, such as by use of one or more fasteners, weldments, adhesives, clamps, and/or mounting brackets, for example.
  • attachment is achieved by attaching a trailer mounting bracket to a trailer, the bi-modulus bending member being operably attached to the trailer mounting bracket.
  • the trailer mounting bracket may be attached to the trailer directly or indirectly, using any additional bracket, as well as any one or more fasteners, weldments, adhesives, or clamps.
  • Attachment of the bi-modulus bending member, or more generally attachment of any skirt-supporting member, to the trailer mounting bracket may also be achieved in any such manner.
  • any skirt- supporting member may be rigidly fixed within the trailer mounting bracket.
  • the bi-modulus bending member, or more generally any skirt-supporting member is attached to the trailer mounting bracket by arranging the bi-modulus bending member or skirt-supporting member into a resilient member formed of elastomeric material.
  • Elastomeric material may comprise any desired material suitable for its intended purpose, and may include, for example, polyurethane, rubber (natural and/or synthetic), and silicone.
  • the resilient member is molded around the bi-modulus bending member or the skirt- supporting member.
  • the resilient member may be simply placed into an orifice and retained therein by one or more other objects, such as pins or fasteners, or by adhesive or interference fit.
  • a pin is arranged to extend through both the resilient member and the skirt- supporting member or bi-modulus bending member.
  • one or more pins are inserted in a central location of the resilient member, to allow the bending member to twist or pivot within the resilient member and about the pin (which acts as an axis of rotation), which allows the skirt- supporting member or bi- modulus bending member and the skirt to move by twisting about the pin and/or flexing as needed in a direction of the trailer or skirt length, which in certain embodiments is generally perpendicular to the bending direction of the bi-modulus bending member (that is, in a direction of a width of the bi-modulus bending member).
  • the pin fixes the bi-modulus bending member or skirt-connection member translationally and rotationally.
  • the bi-modulus bending member or more generally any skirt- supporting member, is simply placed into an orifice of the trailer mounting bracket and retained therein by one or more other objects, such as pins or fasteners, or by adhesive or interference fit.
  • a pin is arranged to extend through the bi-modulus bending member allowing the bi-modulus bending member to pivot in the direction of the length of the skirt about the pin (which acts as an axis of rotation), while not allowing it to pivot in the lateral direction.
  • one or more pins are inserted in a central location of the bending member, to allow the bending member to twist or pivot, which allows that bi-modulus bending member and the skirt to move by twisting about the pin and/or flexing as needed in a direction of the trailer or skirt length, which in certain embodiments is generally perpendicular to the bending direction of the bi-modulus bending member (that is, in a direction of a width of the bi-modulus bending member).
  • the pin fixes the bi-modulus bending member or skirt-connection member translationally and rotationally.
  • the bi-modulus bending member includes one or more elongate bending elements.
  • Each elongate bending element has a length, width, height, and thickness. The length extends in a direction of the bi-modulus bending member length, while the width and height each extend in direction a perpendicular to each other and the length of the elongate bending element.
  • the elongate bending element also has a cross-section extending in both the direction of elongate bending element width and height.
  • each elongate bending element is arranged such that its width extends in a direction of the bi- modulus bending member width and parallel to or coplanar with a central plane (bending plane) of the bi-modulus bending member.
  • the height of each elongate bending element extends in a direction perpendicular to the width, and therefore perpendicular to the central plane of the bi-modulus bending member.
  • the bi-modulus bending member as well as each elongate bending element, is designed to resist an applied force without noticeably bending or deforming, but when the applied force exceeds a designed threshold force, the bi-modulus bending member elastically bends into a bent arrangement, which may bifurcate the bi-modulus bending member, and elastically returns to its original or unbent arrangement.
  • the bi-modulus bending member buckles (that is, the cross-section buckles), whereby the cross-section shape (profile) changes from a first cross-section shape to a second cross-section shape.
  • the bi-modulus bending member and each of the one or more elongate bending elements elastically buckle and bend to a buckled configuration when an applied force (such as its lateral force component) exceeds a threshold force and elastically returns to an unbuckled or unbent configuration when the applied force is reduced below the threshold force or removed.
  • the bi-modulus bending member, and each elongate bending element can be characterized as being a bi-modulus (or bi- stable) member, where each member or element resists bending with a first bending modulus until it buckles or collapses and thereafter bending ensues without any notable plastic deformation or resistance, where the buckled cross-section has a second bending modulus.
  • the bi-modulus characteristic is accomplished by the elongate bending element being a thin-walled member, having a sufficiently thin thickness, such as a thickness of 1.0 millimeters (mm) or less, or 0.5 mm or less, for example.
  • each elongate bending element has a thickness in the range of 0.25 mm to 0.75 mm.
  • each elongate bending element is made from a sheet of stainless steel spring steel, and in other variations, made from any other material that would allow the elongate bending element, alone or together with any other elongate bending elements, which may or may not be the same, to operate as a bi-modulus bending member.
  • the thickness of the elongate bending element has a thickness that may or may not be different from those thickness specifically identified above such as may be required to allow the elongate bending member, alone or together with any other elongate bending members, to operate as a bi-modulus bending member.
  • the elongate bending elements of sufficiently thin thicknesses, plastic deformation is significantly or fully eliminated, and thereby operating alone or in cooperation with other elongate bending elements with a bi- modulus characteristic, or stated differently, as a bi-modulus bending member.
  • any elongate bending element may remain constant or may vary in any lengthwise and/or widthwise direction of the elongate bending element.
  • the selection of a thickness may be made in cooperation with the cross-sectional shape taken in a plane perpendicular to the lengthwise direction of the elongate bending element to arrive at the specific bi-modulus performance requirements desired for a specific use or installation.
  • the bi-modulus characteristic for an elongate bending element is accomplished by the height of the cross-section being less than the width. By increasing the height, the bending stiffness increases, while decreasing the height, the bending stiffness decreases.
  • the height may be equal to any desired distance, in certain embodiments, such as when the elongate bending element has a V, U, or W-shaped cross-section, for example, the height is 6 to 15 mm. Any cross-section have a height may also increase its bending stiffness by increasing the width of the portion of the elongate bending element having a height. While the portion of the elongate bending element cross-section having a height may be equal to any width, in certain embodiments, such as when the elongate bending element has a V, U, or W-shaped cross-section, for example, the width of this portion is 40 mm to 100 mm.
  • a plurality of elongate bending elements may be arranged in a stacked arrangement. It is also noted that when employing a plurality of stacked elongate bending elements, the stacked elongate bending members are able to slide relative each other, which also facilitates the bi-modulus behavior. Moreover, the bi-modulus characteristic may be further accomplished by the unbent or unbuckled cross-section being asymmetrical, the cross-section being asymmetric relative to a centerline extending in a direction of the element' s width. The centerline forms a neutral bending axis or a line that divides the cross-sectional area into equal halves. It is appreciated that any cross-section of the elongate bending element may be constant or variable in size and/or shape along the length of each elongate bending element.
  • each elongate bending element is arranged such that its width extends in a direction of the bi-modulus bending member width and parallel to or coplanar with a central plane of the bi-modulus bending member along a non-linear path.
  • the cross-section extends along a non-linear path comprising an arcuate path in the direction of the elongate bending element width. In extending along an arcuate path, the cross-section is U-shaped. In other variations, cross- section extends along a non-linear path forming a linearly alternating path, such as where the cross-section is V-shaped or W-shaped, for example.
  • each elongate bending element having a U or V-shaped cross-section may be arranged in one of two arrangements, each of which being where a central peak of the U (rounded or planar peak) or of the V (sharp peak or vertex) is arranged furthest or closest to the central plane.
  • the central peak may be flat or otherwise arranged along a central portion extending between the legs of the V-shape or W-shape cross-section. In certain exemplary embodiments, the central portion measures up to 50 mm.
  • the legs of any U, V, or W-shaped cross-section of the elongate bending element are arranged to extend in a direction biased to the direction of the cross-section height, there the direction can be described as having vector components extending in each of the direction of the cross-section height and width.
  • each leg extends at an angle of 70 to 80 degrees relative the direction of the cross-section height or the legs extend in particular directions such that an angle of 140 to 160 degrees is formed between the legs.
  • the direction of the cross-section height can also be described as a plane extending purely in both a direction of the cross- section height (perpendicular to the cross-section width) and a direction of the elongate bending element length.
  • the bending stiffness of the bi-modulus bending member may be selected or adjusted by altering any elongate bending element employed and/or by employing more or less elongate bending elements.
  • the one or more elongate bending elements comprise a plurality of elongate bending elements arranged into a first subset and a second subset. Each of the first subset and the second subset include one or more elongate bending elements of the plurality of bending elements.
  • the first subset is arranged opposite the second subset relative a central plane extending in a direction of the bi-modulus bending member length and width, the central plane being a neutral bending axis for the bi-modulus bending member.
  • each of the first and second subsets may include the same quantity or different quantities of elongate bending elements, and of the same or different form or arrangement, to control the stiffness and performance of the bi-modulus bending member.
  • at least one of the first subset and the second subset includes two or more elongate bending elements of the plurality of bending elongate elements.
  • the two or more elongate bending elements are arranged in a stacked arrangement, that is, side-by-side in a direction of each bending element thickness.
  • a stacked arrangement connotes that elongate bending elements are engaged against one another in a nested or semi-nested arrangement. It is appreciated that in the stacked arrangement, the plurality of bending elements have substantially the same cross-section, while in other embodiments, elements of different cross-sections are employed.
  • such methods include operably attaching a trailer skirt to the bi-modulus bending member, or, more generally to the skirt-supporting member.
  • attachment can be completed directly using hardware, adhesives, welding, or other known methods for attaching like objects.
  • Such attachments may form a fixed attachment, where the attachment constrains each skirt-supporting member, relative to each other, in all directions.
  • a fixed attachment can be accomplished by any known manner, such as by use of fasteners, weldments, adhesives, etc.
  • attachment can be completed where the trailer skirt slides along, or relative to, a skirt-supporting member, such as the bi-modulus bending member, by operably coupling a trailer skirt to a skirt-supporting member, such as the bi-modulus bending member, to provide a sliding coupling between the trailer skirt and the skirt-supporting member or bi-modulus bending member.
  • the trailer skirt may slide along a skirt-supporting member as it bends, which in turn allows a portion of the skirt fixedly attached to the trailer (directly or indirectly) to remain close to the trailer, such as when a top portion of the skirt is attached to the trailer.
  • the sliding coupling includes slidably (also referred to as slidingly herein) arranging a skirt-supporting member, such as the bi-modulus bending member, in a skirt channel. In doing so, one or more skirt channels are used to slidably attach the skirt-supporting member/bi-modulus bending member to the trailer skirt.
  • the one or more skirt channels are configured to receive and partially constrain a skirt-supporting member (such as the bi-modulus bending member) while also permitting the skirt-supporting member (bi-modulus bending member) to slide through and relative the one or more skirt channels.
  • a channel is formed through which the elongate member slides.
  • the channel may be formed by apertures formed within the one or more skirt channels, or between the one or more skirt channels and the skirt.
  • the one or more skirt channels may be attached to the skirt in any manner, such as using any one or more fasteners, weldments, or adhesives.
  • a single member is configured to receive and partially constrain a skirt-supporting member while also permitting the skirt-supporting member to slide there through.
  • This single member may extend partially or fully across a width of the skirt-supporting member.
  • the single member may form a strap, cable, or the like, which may not be necessarily shaped to the skirt-supporting member, or a member shaped to particularly receive a particularly shaped skirt-supporting member, and which may be shaped by molding, extrusion, machining, or any other known shaping process.
  • a pair of skirt channels are employed, with each of the pair arranged on one side of the skirt- supporting member width.
  • such methods may include operably fixing a portion of the trailer skirt to the trailer, such as a top portion, for example. This fixing may be accomplished by any desired manner.
  • operably fixing comprises attaching the portion of the trailer skirt to the trailer or to the trailer mounting member. In more particular instances, operably fixing comprises attaching the top portion of the trailer skirt to the trailer by way of the trailer mounting member.
  • the one or more skirt channels may be formed as a portion of the trailer skirt, such as where one or more skirt channels are integrally formed with or monolithically formed in the trailer skirt.
  • the method can further include coupling two or more skirt panels with the bi-modulus bending member and one or more additional bending members.
  • the method can also include attaching one or more stiffening members to at least two of the two or more skirt panels.
  • FIG. 1 is a view of a trailer system 100 having a trailer skirt 300 attached by a plurality of trailer-skirt coupling apparatuses 200, while FIG. 2 shows an interior side of the trailer skirt 300 in conjunction with a plurality of the trailer-skirt coupling apparatuses.
  • Trailer system 100 includes trailer 110 having a front 112, rear 114, top 116, bottom 118, and sides 120 and 122.
  • Wheel assembly 130 having tires 134 are mounted on axle 132 toward rear 114 of trailer 110.
  • landing gear 140 is used to stand trailer system 100 when not attached to a vehicle.
  • trailer skirt 300 is provided to fluidly isolate at least a portion of the space between landing gear 140 and wheel assembly 130.
  • each trailer-skirt coupling apparatus 200 is arranged under an outer edge of trailer 110 such that a skirt-supporting member 220 comprising a bi-modulus bending member is arranged beneath the outer edge of trailer 110, keeping any attached skirt or skirt panel flush with or withdrawn under the outer edge of trailer 110 at least when bi-modulus bending member 220 is arranged in an unbent or unbuckled configuration.
  • trailer skirt 300 is comprised of front trailer skirt panel 322, rear trailer skirt panel 324, and one or more central skirt panels 326. It is appreciated that, in lieu of the trailer skirt shown, any known trailer skirt may be employed with any variation of the methods and trailer-skirt coupling apparatus contemplated herein. For example, while the front trailer skirt panel 322, rear trailer skirt panel 324, and the one or more central skirt panels 326 are shown to be of different shapes/constructions, it is contemplated that each can be the same in other variations.
  • Each of front trailer skirt panel 322, rear trailer skirt panel 324, and the one or more central skirt panels 326 are coupled to a plurality of trailer-skirt coupling apparatuses 200, which in turn are coupled to the trailer to thereby couple each panel of trailer skirt 300 to trailer 110.
  • Trailer-skirt coupling apparatus 200 includes a trailer mounting bracket 210, bi-modulus bending member 220, and skirt channel 230.
  • Trailer mounting bracket 210 is configured for mechanically coupling the apparatus to a trailer.
  • Bi-modulus bending member 220 is also shown operably attached to the trailer mounting bracket 210 in a cantilevered configuration.
  • Skirt channel 230 is configured to, and shown to, slidingly couple the bi-modulus bending member 220 to the trailer skirt 300.
  • FIGS. 3A and 3B provide lengthwise views of the trailer-skirt coupling apparatus 200.
  • Trailer mounting bracket 210 is shown to have a first portion 212 configured for attachment to a trailer, such as a trailer bottom side rail or other portion of the trailer. The first portion is also shown in FIG. 3D from a top view.
  • the trailer mounting bracket is configured to use fasteners for attaching the trailer mounting bracket to the trailer.
  • Side members 214 extend between the first portion 212 and a second portion 216 for the purpose of providing additional strength and structural integrity to the trailer mounting bracket 210.
  • Second portion 216 is configured to attach to (or receive and retain) bi-modulus bending member 220.
  • bi-modulus bending member 220 is retained within a resilient member 218, which is made of an elastomeric material that permits the bi-modulus member to twist while remaining fixed in certain directions within the trailer mounting bracket 210 by a pin 219 extending through the second portion 216, the resilient member and the bi-modulus bending member. It is appreciated that in certain variations, the pin does not extend through the bi-modulus bending member or is not used at all in lieu of other retention mechanism(s). Bi-modulus bending member 220 is shown to have a length L220, extending from within the trailer mounting bracket 210 and to a terminal end 222 arranged within skirt channel 230.
  • skirt channel may be arranged along any portion of bi-modulus bending member length, such that terminal end may be maintained within or outside the skirt channel.
  • a width W220 of bi-modulus bending member 220 is shown, while in FIG. 3B, a height H220 of the bi- modulus bending member is shown.
  • bi-modulus bending member 220 is shown to comprise a plurality of elongate bending elements 224 separated into a first subset 226 and a second subset 228, where a central plane P of bi-modulus bending member 220 is located between the subsets.
  • Central plane P can be referred to as the neutral bending plane (containing a neutral bending axis of the cross-section) of the bi-modulus bending member 220.
  • Each of the plurality of elongate bending elements are shown to have a cross-section in an unbuckled configuration.
  • Each cross-section can be said to be asymmetric in the unbuckled configuration relative to a centerline of the cross-section extending in a direction of the elongate bending element width and passing by the center of gravity of the cross- section.
  • Each of the plurality of bending elements has substantially the same cross-section in the unbuckled configuration.
  • the cross-section can also be described as extending along a non-linear path in a direction of the element width, in the unbuckled configuration.
  • each of the elongate bending elements 224 are shown to have V-shaped cross-sections.
  • the open side of the V-shaped cross-section for each elongate bending element 224 of the first subset 226 faces or is directed towards the open side of the V-shaped cross-section for each elongate bending element 224 of the second subset 228, and vice versa.
  • the V-shaped cross-sections can be oppositely arranged relative to each other, where the open side for each elongate bending element in one subset faces away from the open side for each elongate bending element in the other subset.
  • other cross- section variations are contemplated, including U-shaped cross-sections.
  • the bi-modulus bending member may include one or any plurality of elongate bending elements which may be relegated to a single subset or divided into multiple subsets.
  • the plurality of elongate bending elements are each a thin-walled member, where the corresponding thickness of each is small relative the length, height, and width of each such element.
  • elongate bending element thickness T220 is shown.
  • each of the plurality of elongate bending elements are formed of stainless steel spring steel having any thickness contemplated herein, but as stated previously, any other material or materials may be employed to achieve an elongate bending element that alone or together with one or more additional elongate bending members operates as a bi-modulus bending member.
  • Thickness T220 is shown to remain constant, but may vary as otherwise contemplated herein.
  • each such element may be formed of multiple thin layers of material to discourage plastic deformation.
  • a single element can have multiple layers, or multiple elements in a set can comprise single thin layers.
  • bi-modulus bending member 220 is shown to extend downward from trailer mounting bracket 210 in an unbent and unbuckled configuration.
  • bi-modulus bending member is substantially straight and rigid as it resists applied forces (such as lateral or side forces) below a threshold force (buckling threshold) that otherwise would bend and buckle the bi-modulus bending member at a location along its length.
  • applied forces such as lateral or side forces
  • buckling threshold a threshold force
  • the bi-modulus bending member is characterized as having a first bending modulus.
  • the bi-modulus bending member buckles elastically (that is, without or with negligible plastic deformation) as it transitions to a flexible state having a reduced bending modulus as the cross-section of the bi-modulus bending member changes locally at the buckling location.
  • FIGS. 4A and 4B where the bi-modulus bending member 220 is shown in a bent and buckled configuration. In this configuration, it is apparent that the cross-section of the bi-modulus bending member collapses to narrowed height and to a reduced bending modulus.
  • bi-modulus bending member Upon removal of the threshold force, bi-modulus bending member returns to an unbuckled configuration, substantially returning itself (and any attached skirt or skirt panel) to its rigid position without or with negligible plastic deformation. While aspects herein refer to lateral forces, buckling can also occur due to a longitudinal force transmitted substantially aligned with the length of the bi-modulus bending member.
  • trailer-skirt coupling apparatus 200, bi- modulus bending member 220, and the trailer skirt 300 are shown in a bent and buckled configuration.
  • first subset 226 and second subset 228 of the plurality of elongate bending elements 224 collapse and narrow in cross-sectional height to H220' and simultaneously slightly extend in cross-sectional width to W220' in the buckled configuration. This reduces the bending modulus and resistance to bending, in turn permitting bi-modulus bending member 220 and skirt 300 to swing inward or outward as required with less resistance.
  • FIG. 4B the narrowed height H220' of bi-modulus bending member 220 and each elongate bending element 224 is evident.
  • the bi-modulus bending member can retain substantially similar qualities over a desired range of temperatures and operating conditions, including without limitation corrosion, ultraviolet light, chemical exposure, and other environmental and roadway hazards. It is also appreciated that the bi-modulus bending member may be configured only to buckle inward (that is, in a direction below a trailer) and not outward (that is, in a direction away from the trailer) and in both inward and outward directions. It is also appreciated that different bending resistance may be provided by the bi- modulus bending member in the inward and outward directions.
  • bi-modulus bending member 220 is shown slidingly coupled to a trailer skirt 300 permitting relative motion between the bi-modulus bending member and the trailer skirt as the bi-modulus bending member bends between unbuckled and buckled configurations.
  • this sliding attachment is achieved using skirt channel 230, although appropriate alternatives can be substituted to achieve the stated purpose of providing a sliding attachment of the bi-modulus bending member to the skirt.
  • Skirt channel 230 can comprise one or more discrete elements and is configured to be fixedly attached to a skirt. In the embodiment depicted more specifically in FIGS. 3A-3C, skirt channel 230 is formed using two elements, namely, first skirt channel guide 231 and second skirt channel guide 232.
  • First skirt channel guide 231 and second skirt channel guide 232 are fixedly arranged to at least a portion of a trailer skirt (e.g. , a panel of a trailer skirt, a part of a monolithic trailer skirt) for accepting bi-modulus bending member 220.
  • First skirt channel guide 231 and second skirt channel guide 232 can be attached to a trailer skirt using fasteners, weldments, adhesives, and/or any other desired means.
  • first skirt channel guide 231 and second skirt channel guide 232 include a groove 233 within which the bi-modulus bending member 220 translates as it slides relative to the skirt during bending.
  • one or more grooves can be formed between the skirt and skirt channel to receive the bi-modulus bending member and form a sliding attachment thereof to the skirt.
  • one or more skirt channels may be formed within the trailer skirt.
  • each of a top edge 235 arranged between a top side 234 and the back face 238 of the skirt channel and a bottom edge 237 arranged between a top side 236 and the back face 238 of the skirt channel are rounded or chamfered to reduce any contact stresses between the skirt channel and the skirt when any skirt- supporting member bends.
  • trailer skirt 300 may be arranged to ensure its displacement during buckling of bi-modulus bending member 220 is contained beneath the trailer.
  • trailer mounting bracket 210 can be arranged beneath the trailer such that trailer skirt 300 is inset beneath the bottom of the trailer.
  • trailer mounting bracket 210 and/or bi-modulus bending member 220 can be angled inward to arrange trailer skirt 300 at a non-normal angle to the bottom of a trailer.
  • a top portion 310 of the trailer skirt can be attached to a trailer as to hold the forces attempting to pull the top of the trailer skirt away from the trailer as the bi-modulus bending member bends. Otherwise, if not attaching the top of the skirt to the trailer, the top of the skirt would flare out from the side of the trailer as the bi-modulus bending member bends, whereby the trailer skirt could impact any obstacles located outwardly from the sides of the trailer.
  • bi-modulus bending member 220 bends inwardly, such as is shown by example in FIG.
  • the trailer skirt top 310 remains fixed relative to the trailer 110 while a bottom portion 320 of the skirt bends inwards with the bi-modulus bending member 220 with relative translation between the bi-modulus bending member and the skirt channel 230.
  • a top portion 310 of the trailer skirt can be placed in one or more grooves along the side of the trailer 110 and thereby permit the top portion of the skirt to slide up and down within the one or more grooves as the bi-modulus bending member bends.
  • Other alternatives may be employed to achieve this stated purpose.
  • trailer skirt 300 is generally shown in a configuration whereby trailer-skirt coupling apparatus is located inward (behind) the trailer skirt relative to an outer side of the trailer along which the skirt is mounted
  • alternative embodiments permit the trailer-skirt coupling apparatus to be arranged outside (in front of) the trailer skirt relative to outer side of the trailer along which the skirt is mounted.
  • the trailer skirt can include stiffening members to maintain the structural integrity of the skirt during operation.
  • trailer skirt 300 includes stiffening members 340 arranged between two or more of front skirt panel 322, rear skirt panel 324, and central skirt panels 326. Stiffening members 340 can create a rigid or semi-rigid continuity between different panels to prevent relative movement there between or a flow of air between adjacent panels.
  • FIG. 5 illustrates an alternative embodiment of a trailer-skirt coupling apparatus 400 including a trailer mounting bracket 410, bi-modulus bending member 420, and skirt channel 430 used to couple a trailer skirt to the bi-modulus bending member 420.
  • bi-modulus bending member 420 includes a first subset 440 and a second subset 450.
  • First subset 440 as illustrated includes two elongate bending elements 441 and 442, while second subset 450 includes three bending elements 451, 452, and 453.
  • Each of the elongate bending elements are shown to have an arcuate, or more specifically, a U-shaped cross-section.
  • various combinations of one or more bending elements within a single respective subset or multiple subsets of a bi-modulus bending member can be utilized to effect the desired bending properties of the bi-modulus bending member and the first and second bending modulus of the bi-modulus bending member under various force thresholds.
  • each elongate bending element may be characterized as having any desired cross-sectional shape having a height to provide a desired bending modulus for forming a bi-modulus bending member.
  • V-shaped and U-shaped elongate bending elements 224, 441, 442, 451-453 are employed, respectively.
  • another elongate bending element 524 having a nonlinear cross-section is shown forming a U-shaped cross-section having smooth transitions at the ends of the "U".
  • Elongate bending element 624 has a thickness t and a height B, While the elongate bending element 624 may have any desired thickness as contemplated herein, in certain embodiments the element has a thickness t of 1.0 millimeters (mm) or less, or 0.5 mm or less, for example, or in more specific instances, a thickness t in the range of 0.25 mm to 0.75 mm.
  • height B may be equal to any desired distance contemplated herein, in certain embodiments, the height B is 6 to 15 mm. Any cross-section having a height B may also increase its bending stiffness by increasing the width C of the portion of the elongate bending element extending outwardly by a height. While this portion of the elongate bending element cross-section may be equal to any width C, in certain embodiments, the width C of this portion is 40 mm to 100 mm. It is also appreciated that the central peak may be flat or curvilinear, extending widthwise by a width D between the legs of the V-shape or W-shape cross-section.
  • the width D of central portion 530, 630 measures up to 50 mm (0 to 50 mm). It is also noted that the legs of any U, V, or W-shaped cross-section of the elongate bending element are arranged to extend in a direction biased to the direction of the cross-section height B, there the direction can be described as having vector components extending in each of the direction of the cross-section height B and width C. In certain instances, for example, each leg 526, 528, 626, 628 extends at an angle A measuring 140 to 160 degrees is formed between the legs 526, 528, 626, 628, although other angles may be employed as desired to achieve a desired bending stiffness.
  • the direction of the cross-section height can also be described as a plane extending purely in both a direction of the cross-section height (perpendicular to the cross- section width) and a direction of the elongate bending element length.
  • FIG. 7 is a graph depicting test results of the present invention as compared to skirt supporting members of the prior art.
  • the skirt- supporting member of the present invention was tested against Ridge Corp.'s Green Wing ® side skirt, Laydon Composites, Ltd.'s Trailerskirt ® , Utility Trailer Manufacturing Co.'s 120A-4 side skirt, and Transtex Composite's EDGE trailer skirt.
  • the side skirt and skirt supporting member of the present invention is the only combination that buckles in response to a lateral force component reaching a threshold force.
  • the precise moments at which the side skirt and skirt supporting member of the present invention buckles can be seen in the sharp decline in force when viewing the line corresponding to the present invention.
  • the stiffness of the skirt supporting member before buckling is 8 to 10 times the stiffness of the skirt, and the stiffness of the skirt supporting member after buckling is 4 to 5 times the stiffness of the skirt, or stated more generally, reduces by 50% after buckling.
  • the flexibility of the skirt is maximized in both an inward and outward direction.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

La présente invention concerne des procédés et un appareil pour attacher une jupe de remorque à une remorque. Certains modes de réalisation des procédés comprennent l'attachement d'un élément de support de jupe à une remorque sous une configuration en porte-à-faux, et le couplage fonctionnel d'une jupe de remorque à l'élément de support de jupe pour fournir un couplage coulissant entre la jupe de remorque et l'élément de support de jupe. Des modes de réalisation de l'appareil fournissent un appareil de couplage de jupe de remorque comprenant un support de montage de remorque configuré pour coupler mécaniquement l'appareil à une remorque, un élément de support de jupe attaché de manière fonctionnelle au support de montage de remorque sous une configuration en porte-à-faux, et un canal de jupe configuré pour coupler de manière coulissante l'élément de support de jupe à la jupe de remorque.
PCT/US2016/054947 2015-09-30 2016-09-30 Procédés et appareil pour monter de façon coulissante une jupe de remorque WO2017059330A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP2018516854A JP2018529575A (ja) 2015-09-30 2016-09-30 トレーラスカートをスライドして装着するための方法及び装置
EP16790458.0A EP3356210B1 (fr) 2015-09-30 2016-09-30 Procédés et appareil pour monter de façon coulissante une jupe de remorque
CA3000007A CA3000007C (fr) 2015-09-30 2016-09-30 Procedes et appareil pour monter de facon coulissante une jupe de remorque
MX2018003924A MX2018003924A (es) 2015-09-30 2016-09-30 Metodos y aparatos para montaje por deslizamiento de faldon para remolque.
CN201680056940.XA CN108473163B (zh) 2015-09-30 2016-09-30 用于滑动安装拖车裙板的方法和设备
AU2016331201A AU2016331201B2 (en) 2015-09-30 2016-09-30 Methods and apparatus for slidingly mounting trailer skirt
US15/764,807 US10577033B2 (en) 2015-09-30 2016-09-30 Methods and apparatus for slidingly mounting trailer skirt

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201562235209P 2015-09-30 2015-09-30
US62/235,209 2015-09-30
USPCT/US2015/065236 2015-12-11
PCT/US2015/065236 WO2017058271A1 (fr) 2015-09-30 2015-12-11 Procédés et appareil pour monter de façon coulissante une jupe de remorque

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WO2017059330A1 true WO2017059330A1 (fr) 2017-04-06

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Publication number Priority date Publication date Assignee Title
CN108749933A (zh) * 2018-06-08 2018-11-06 芜湖国风塑胶科技有限公司 一种用于电动汽车的汽车侧裙连接机构及其使用方法
WO2019083518A1 (fr) * 2017-10-25 2019-05-02 Compagnie Generale Des Etablissements Michelin Structures de support de réduction d'espacement élastique et procédés
US11738704B2 (en) 2020-04-02 2023-08-29 Great Dane Llc Underride guard assembly for trailers

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JP2003011855A (ja) * 2001-06-29 2003-01-15 Mitsubishi Motors Corp 空気整流部材の取付構造
US20030057736A1 (en) * 2001-08-24 2003-03-27 Windyne Inc. Adjustable trailer underbody fairing
US20140300134A1 (en) * 2013-04-04 2014-10-09 Fleet Engineers, Inc. Trailer side skirt assembly

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Publication number Priority date Publication date Assignee Title
JP2003011855A (ja) * 2001-06-29 2003-01-15 Mitsubishi Motors Corp 空気整流部材の取付構造
US20030057736A1 (en) * 2001-08-24 2003-03-27 Windyne Inc. Adjustable trailer underbody fairing
US20140300134A1 (en) * 2013-04-04 2014-10-09 Fleet Engineers, Inc. Trailer side skirt assembly

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019083518A1 (fr) * 2017-10-25 2019-05-02 Compagnie Generale Des Etablissements Michelin Structures de support de réduction d'espacement élastique et procédés
US11097791B2 (en) 2017-10-25 2021-08-24 Compagnie Generale Des Etablissements Michelin Resilient gap reducing support structures and methods
CN108749933A (zh) * 2018-06-08 2018-11-06 芜湖国风塑胶科技有限公司 一种用于电动汽车的汽车侧裙连接机构及其使用方法
US11738704B2 (en) 2020-04-02 2023-08-29 Great Dane Llc Underride guard assembly for trailers

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