The present disclosure relates generally to joining a rail member to a composite cargo vehicle structure, such as a trailer structure and, more particularly, to joining a rail member to a composite floor assembly of a flat-bed or enclosed trailer.
A trailer or another cargo vehicle which supports and transports cargo may be a flat-bed or enclosed trailer. The flat-bed trailer includes an exposed floor assembly for supporting the cargo, the floor assembly being coupled to a perimeter frame assembly including one or more side rails, a front rail, and/or a rear rail. The enclosed trailer or cargo vehicle additionally includes side walls, a front wall, a rear door, and a roof that cooperate with the floor assembly to enclose the cargo. Any of the cargo vehicle components, for example the floor assembly, side walls, roof, and/or front wall, may be a composite structure formed from various metallic and/or polymeric materials.
Due to the configuration of composite structures, coupling another component of the cargo vehicle to the composite structure by forming holes in the composite structure for mechanical fasteners (e.g., bolts, rivets) may damage a portion of the composite structure. For example, the fibers in and around the holes of the composite structure may be damaged by the tool used to form the holes and/or by the fasteners placed in the holes. Therefore, a need exists to join various components of a cargo vehicle to a composite structure of the trailer (e.g., a composite floor assembly) while preserving the structural integrity of the composite structure.
In one embodiment, a cargo vehicle configured to support cargo comprises a frame assembly including at least one rail member defining a portion of an outer perimeter of the trailer and a composite member adjacent to the frame assembly. The cargo vehicle further comprises an intermediate mounting member removably coupled to the at least one rail member and permanently coupled to the composite member.
In another embodiment, a method of joining a frame assembly of a cargo vehicle to a composite member of the cargo vehicle comprises providing at least one rail member of the frame assembly, abutting a portion of the composite member with a portion of the at least one rail member, and providing a mounting member. The method further comprises removably coupling the mounting member to the at least one rail member and permanently coupling the mounting member to the composite member.
In a further embodiment, a cargo vehicle comprises a frame assembly including at least one rail member defining a portion of an outer perimeter of the cargo vehicle. Additionally, the cargo vehicle comprises a composite member adjacent to the frame assembly and a mounting member. The mounting member includes first and second portions removably coupled to the at least one rail member and a third portion permanently coupled to the composite member.
Additional features and advantages of the present invention will become apparent to those skilled in the art upon consideration of the following detailed description of the illustrative embodiments exemplifying the best mode of carrying out the invention as presently perceived.
The foregoing aspects and many of the intended advantages of this invention will become more readily appreciated as the same becomes better understood by reference to the following detailed description when taken in conjunction with the accompanying drawings.
Corresponding reference characters indicate corresponding parts throughout the several views. Although the drawings represent embodiments of various features and components according to the present disclosure, the drawings are not necessarily to scale and certain features may be exaggerated in order to better illustrate and explain the present disclosure. The exemplification set out herein illustrates an embodiment of the invention, and such an exemplification is not to be construed as limiting the scope of the invention in any manner.
For the purposes of promoting an understanding of the principals of the invention, reference will now be made to the embodiments illustrated in the drawings, which are described below. The embodiments disclosed below are not intended to be exhaustive or limit the invention to the precise form disclosed in the following detailed description. Rather, the embodiments are chosen and described so that others skilled in the art may utilize their teachings. It will be understood that no limitation of the scope of the invention is thereby intended. The invention includes any alterations and further modifications in the illustrative devices and described methods and further applications of the principles of the invention which would normally occur to one skilled in the art to which the invention relates.
Referring to
The illustrative trailer 10 of
Various components of trailer 10 may be composite structures (i.e., structures constructed of composite materials). In one embodiment, side walls 16, front wall 18, the rear door, roof 22, and/or floor assembly 24 of trailer 10 are composite structures. In particular, the floor assembly 24 of trailer 10 may be a composite structure, in whole or in part.
In general, composite materials are formed by combining two or more different constituents that remain separate and distinct in the final composite material. Exemplary composite materials may include fiber-reinforced plastics (FRP), for example carbon-fiber-reinforced plastics (CRP). Such materials may be formed from an extruded preform assembly of a woven or stitched fiberglass cloth, non-woven spun bond polymeric material, and a foam core 48c (
The individual preforms may be sized, shaped, and arranged in a manner that accommodates the strength requirements of the final structure. In areas of the final structure requiring less strength, the preforms may be relatively large in size, with the foam cores 48c (
After the curing process, a coating may be applied to the inner and/or outer surfaces of the cured preforms. Additionally, metallic or non-metallic sheets or panels may be applied to the inner and/or outer surfaces of the cured preforms, either in place of the coating or with the coating. The metallic sheets or panels may be comprised of stainless steel, aluminum, and/or coated carbon steel, and the non-metallic sheets or panels may be comprised of carbon fiber composites, for example.
Exemplary composite structures include DuraPlate® panels available from Wabash National Corporation of Lafayette, Ind. and PRISMA® panels available from Compsys, Inc. of Melbourne, Fla. Such composite structures may be manufactured using technology disclosed in the following patents and published patent applications, each of which is incorporated by reference in its entirety herein: U.S. Pat. Nos. 5,429,066, 5,800,749, 5,664,518, 5,897,818, 6,013,213, 6,004,492, 5,908,591, 6,497,190, 6,911,252, 5,830,308, 6,755,998, 6,496,190, 6,911,252, 6,723,273, 6,869,561, 8,474,871, 6,206,669, 6,543,469, and 9,371,468 and U.S. Patent Application Publication No. 2014/0262011.
To define the ends of body 14, the rear door (not shown) may be operably coupled to side walls 16, roof 22, and floor assembly 24, through a rear frame member 26. Rear frame member 26 may be comprised of a metallic material. In one embodiment, rear frame member 26 is any non-composite metallic material, for example, aluminum. Additionally, front wall 18 is positioned opposite the rear door and may be joined with side walls 16, roof 22, and floor assembly 24 through a front frame member 28. Alternatively, front wall 18 may be integrally formed with side walls 16, roof 22, and floor assembly 24.
To define the sides of body 14, a lower end of side walls 16 may be joined with floor assembly 24 through a lower side frame member or rail 30, and an upper end of side walls 16 may be joined with roof 22 through an upper side frame member or rail 32. In one embodiment, side walls 16 extend continuously between front wall 18 and the rear door. Alternatively, side walls 16 may be comprised of a plurality of panels joined together along the length between front wall 18 and the rear door. Lower side rail 30 and/or upper side rail 32 may be comprised of an extrudable metallic material, for example, aluminum. Alternatively, side walls 16 may be integrally formed with floor assembly 24 and roof 22.
In a further embodiment of
Referring next to
The composite construction of floor assembly 24 may present certain advantages. First, because the composite structures may lack internal metal components, the composite floor assembly 24 may have a reduced heat loss coefficient (Ua) and improved thermal efficiency. Also, the composite floor assembly 24 may operate to minimize outgassing of blowing agents, minimize air loss, and minimize water intrusion. Additionally, the composite floor assembly 24 may be lighter in weight than a typical metallic cargo body, which may improve fuel efficiency. Further, the composite floor assembly 24 may have fewer metallic structures than a typical cargo body, which may make the cargo body 14 less susceptible to corrosion. Also, the composite floor assembly 24 may include fewer parts than a typical metallic cargo body, which may simplify construction, reduce inventory, and reduce variation in manufacturing. Further, the composite floor assembly 24 may be suitable for use with sensitive cargo, including foodstuffs, because the composite materials may be inert to avoid reacting with the cargo and other materials and because the composite materials may be easy to clean and maintain to ensure proper hygiene. As a result, the composite floor assembly 24 may qualify as “food grade” equipment.
Referring still to
Referring next to
As shown in
As discussed above, floor assembly 24, and specifically cross members 48 of floor assembly 24, may be composite structures. Due to the configuration of composite structures, the composite cross members 48 may not be directly coupled to side rails 46 with mechanical fasteners, because forming holes in the composite cross members 48 for direct insertion of mechanical fasteners (e.g., bolts, rivets) may damage the fibers of the composite material forming cross members 48.
To preserve the structural integrity of composite floor assembly 24, cross members 48 of composite floor assembly 24 may be coupled to side rails 46 through intermediate mounting members, as shown in
The intermediate mounting members disclosed herein are permanently coupled to cross members 48 of composite floor assembly 24 and are removably coupled to side rails 46, which enables composite floor assembly 24 to be removably coupled to side rail 46 through the mounting member. As used herein, components that are “removably coupled” together are capable of being repeatedly un-coupled without damage or destruction and then re-coupled together. In certain exemplary embodiments, components may be “removably coupled” together through fasteners (e.g., bolts, rivets). By contrast, components that are “permanently coupled” together require damage or destruction to the components themselves or the coupling mechanism in order to be un-coupled. In certain exemplary embodiments, components may be “permanently coupled” together through bonding (e.g., adhering) and/or molding, for example. The strength of the permanent coupling mechanism (e.g., adhesive) may exceed the strength of composite floor assembly 24 itself, so composite floor assembly 24 may delaminate or otherwise fail before the adhesive fails.
Any of the mounting members disclosed herein are not limited to the configurations shown and may be formed in different configurations and/or combined with any of the other mounting members such that floor assembly 24 may be coupled to side rails 46 with any combination or configuration of the mounting members disclosed herein. Additionally, the mounting members disclosed herein may be comprised of a metallic or polymeric material, for example aluminum, titanium, or steel. In one embodiment, the mounting members are comprised of an extruded metallic or polymeric material which is dissimilar from the materials used to construct floor assembly 24. The mounting members may have a thickness, t, of approximately 0.1-0.5 inches, more particularly, approximately 0.2 inches (
Illustratively,
Linear sections 54a, 58a may include at least one opening 60 for receiving a fastener 62. Illustratively, linear section 54a includes two openings 60 and linear section 58a includes one opening 60. Openings 60 may have a diameter, D, of approximately 0.2-0.6 inches and, more particularly, approximately 0.4 inches (
Fastener 62 may include a bolt, rivet, screw, another mechanical fastener, or any combination thereof. In this way, linear sections 54a, 58a of mounting member 52 are removably coupled to side rails 46 with fasteners 62. More particularly, and as shown in
As shown in
Wall 56 also includes a plurality of protrusions 82 extending outwardly from outer surface 56b. As shown in
The adhesive supplied to gap 84 for bonding mounting member 52 to cross members 48 of composite floor assembly 24 may be a structural adhesive. Structural adhesives may be used for load-bearing applications and, therefore, may be epoxies, acrylics, polyurethanes, cyanoacrylates, anaerobics, phenolics, and/or vinyl acetates with a lap shear strength greater than 1 MPa. Structural adhesives are typically applied to bonding surfaces at a temperature below the glass-transition temperature of the adhesive and subsequently cured over time and/or with heat.
Referring next to
Legs 188 of mounting member 152 are angled relative to outer plate 186 and, as shown in
Referring still to
As shown in
Referring next to
Legs 288 of mounting member 252 are angled relative to outer plate 286 and, as shown in
Referring still to
Referring next to
Leg 388 of mounting member 352 is angled relative to outer plate 386 and, as shown in
Referring next to
Legs 488, 490 of mounting member 452 are angled relative to outer plate 486 and, as shown in
Referring next to
Mounting member 552 also includes an opening 580 and a plurality of protrusions 582. As such, when mounting member 552 is positioned within recessed portion 49, protrusions 582 abut the adjacent cross member 48 of composite floor assembly 24 to define a gap 584 between mounting member 552 and cross member 48. Mounting member 552 is bonded to cross member 48 with adhesive (not shown) which is supplied to gap 584 through opening 580. Opening 580 may have a diameter similar to diameter, d, of openings 80 (
While this invention has been described as having an exemplary design, the present invention may be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practices in the art to which this invention pertains.
This application is a divisional of U.S. patent application Ser. No. 15/738,341, filed Mar. 7, 2018, which is a U.S. National Stage Application of International Patent Application No. PCT/US2016/050509, filed Sep. 7, 2016; which claims priority to U.S. Provisional Patent Application Ser. No. 62/299,215, filed Feb. 24, 2016, the complete disclosures of which are hereby expressly incorporated by reference herein in their entirety.
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20200130752 A1 | Apr 2020 | US |
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62215671 | Sep 2015 | US |
Number | Date | Country | |
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Parent | 15758341 | US | |
Child | 16729915 | US |