Patent Application
20180170453
This disclosure relates to assemblies for pickup truck boxes including an upper rail.
Pickup trucks are motor vehicles with a front passenger area, often referred to as a cab, and an open top rear cargo area, often referred to as a box. The box usually has a substantially flat bed from which two side body panels and a forward interconnecting header extend upwardly from the bed. Pickup trucks may also employ a bottom hinged door, commonly referred to as a tailgate, hinged at the rear edge of the bed and closable to provide a fourth wall for the cargo area. Cabs and boxes may be separate assemblies or part of the same unibody structure. Pickup trucks are popular largely because the box allows them to be utilized in many different ways, including carrying a variety of types of cargo and towing various types of trailers. Stamped pickup truck box components may often be made from steel sheet metal. The components may form assemblies of multiple parts including multiple assembly steps.
According to an aspect of the present disclosure, a pickup truck box assembly includes a header, an upper rail, and a truck bed. The header includes a first angled flange extending away from a tailgate. The upper rail includes a second angled flange mounted to the first angled flange and includes a forward wall, a rear wall, an upper wall extending between the forward and rear walls, and an angled wall. The truck bed supports the header at a forward end. The walls and the second angled flange define a fixed cross-section profile. A mid-wall may extend between the forward wall and the rear wall and may be spaced from the upper wall to define two cells extending laterally a width of the truck bed. The upper rail may be extruded and include a first thickness greater than a second thickness at a portion of the upper rail where the second angled flange contacts the rear wall. The first angle flange may extend at an angle greater than ninety degrees from a body of the header. First and second body side panels may be mounted to the truck bed and arranged with the walls to close a channel defined by the walls. The angled wall and the second angled flange may be arranged with one another to define a V-shape. The upper rail may be disposed between C-pillars of the pickup truck box providing additional stiffness to the pickup truck box.
According to another aspect of the present disclosure, an upper rail for a pickup truck box assembly includes an upper wall, a forward wall, a rear wall, an angled wall, and an angled flange. The forward wall extends from the upper wall at substantially ninety degrees. The rear wall extends from the upper wall and is oriented substantially parallel with the forward wall. The angled wall extends from the forward wall to the rear wall. The angled flange extends from the rear wall and the angled wall. The walls and angled flange are formed by an extrusion process as a single component. A mid-wall may extend between the forward wall and the rear wall to define two channels each extending a length of the upper rail on either side of the mid-wall. The walls may define a continuous and fixed cross-sectional profile. The walls may extend laterally between C-pillars of the pickup truck box to increase a stiffness of the pickup truck box. The angled flange may be sized for mounting to a flange extending from a body of a header toward a tailgate. The walls may be formed so that the upper rail includes a first thickness greater than a second thickness at a portion of the upper rail where the angled wall contacts the rear wall. The walls may be formed so that the upper wall includes a first thickness greater than a second thickness of one of the forward wall, the rear wall and the angled wall.
According to a further aspect of the present disclosure, a pickup truck box assembly includes a truck bed, a header, an upper rail, and first and second body side panels. The header is mounted to a forward end of the truck bed. The upper rail is mounted to an upper portion of the header. The first and second body side panels are mounted at opposing sides of the truck bed. The upper rail defines a continuous and fixed cross-sectional profile. The upper rail may include an upper wall, a forward wall extending from the upper wall, a rear wall extending from the upper wall, an angled wall extending between the forward wall and the rear wall, and a mid-wall extending between the forward wall and the rear wall spaced from the upper wall to define a pair of channels extending a length of the upper rail. The walls may be formed so that the upper rail includes a first thickness greater than a second thickness at a portion of the upper rail where an angled wall of the upper rail meets a rear wall of the upper rail. The upper rail may include a first angled flange for mounting to a second angled flange of the header. The upper rail may be disposed between C-pillars of the pickup truck box assembly to provide additional stiffness to the pickup truck box. The upper rail may further include an angled flange extending toward a vehicle cabin.
The above aspects of the disclosure and other aspects will be apparent to one of ordinary skill in the art in view of the attached drawings and the following detailed description of the illustrated embodiments.
The illustrated embodiments are disclosed with reference to the drawings. However, it is to be understood that the disclosed embodiments are intended to be merely examples that may be embodied in various and alternative forms. The figures are not necessarily to scale and some features may be exaggerated or minimized to show details of particular components. The specific structural and functional details disclosed are not to be interpreted as limiting, but as a representative basis for teaching one skilled in the art how to practice the disclosed concepts.
Referring to
The first outer side panel 22 and the second outer side panel 23 are secured to the header 18 at respective regions referred to as forward box pillar regions of the truck box 14 or the C-pillar regions 24C herein. The tailgate 20 pivots between an open position and a closed position. In the closed position as shown in
The upper rail 40 may be formed by an extrusion process to form components having a fixed or uniform cross-sectional profile. Heated material is extruded through a die of a desired cross-section. A ram of a press pushes the material blank toward and through the die. Extruding the upper rail 40 provides an option to have varied component thicknesses at various portions of the upper rail 40. For example, an increased material thickness may span laterally a length of the upper rail 40 or an increased material thickness may be located at a portion of the upper rail 40 in which the rear wall 42 and the angled wall 48 join one another to provide additional stiffness. Further, extrusion processes are typically less complex than stamping processes and produce components with improved finishes in comparison to stamped components. As such, the upper rail 40 may define a continuous and fixed cross-sectional profile.
An angled flange 62 extends from the rear wall 42 and the angled wall 48. The angled flange 62 may extend forward at an angle greater than ninety degrees relative to the rear wall 42. The angled flange 62 may be secured to a flange of a header, such as flange 66. The angled flange 62 may extend forward at an angle sufficient to provide spacing for a tool to apply fasteners to secure the angled flange 62 to flange 66. The angled flange 62 and the flange 66 may be secured to one another by a variety of joining processes such as welding or mechanical fastening. In another example, the upper rail 40 may be secured to the header by an extension member extending from the rear wall 42 without an angle. In yet another example, the upper rail 40 may define integrated attachments for receiving a portion of a vehicle component such as a headache rack or a tonneau cover.
Prior art toolboxes for pickup trucks are typically a separate component, bulky, and cut down on available space within a pickup truck box assembly. The toolbox 100 addresses these issues. The lower wall 108 of the toolbox 100 may be spaced from the truck bed at a distance equal to or greater than a height of wheel wells of the truck box. For example, the lower wall 108 may be spaced from a truck bed approximately 240 mm where a height of the respective wheel wells is approximately 233 mm. This spacing may provide for materials to be positioned within the truck box and extend to the header. In comparison, prior art toolboxes rest just above the truck bed.
The upper rail 40, the upper rail 80, and the toolbox 100 may be formed of an aluminum alloy. Aluminum alloys are generally identified by a four-digit number, the first digit of which typically identifies the major alloying element. When describing a series of aluminum alloys based on the major alloying element, the first number may be followed by three x's (upper or lower case) or three 0's (zeros). For example, the major alloying element in 6xxx or 6000 series aluminum alloy is magnesium and silicon, while the major alloying element of 5xxx or 5000 series is magnesium and for 7xxx or 7000 series is zinc. Additional numbers represented by the letter ‘x’ or number ‘0’ in the series designation define the exact aluminum alloy. For example, a 6061 aluminum alloy has a composition of 0.4-0.8% Silicon, 0-0.7% Iron, 0.15-0.4% Copper, 0-0.15% Manganese, 0.8-1.2% Magnesium, 0.04-0.35% Chromium, 0-0.25% Zinc, and 0-0.15% Titanium. Different alloys provide different trade-offs of strength, hardness, workability, and other properties.
In addition, five basic temper designations may be used for aluminum alloys which are: F—as fabricated, O—annealed, H—strain hardened, T—thermally treated, and W—as quenched (between solution heat treatment and artificial or natural aging). The temper designation may be followed by a single or double digit number for further delineation. For example, aluminum with a T6 temper designation has been solution heat treated and artificially aged, but not cold worked after the solution heat treatment (or such that cold working would not be recognizable in the material properties).
The embodiments described above are specific examples that do not describe all possible forms of the disclosure. The features of the illustrated embodiments may be combined to form further embodiments of the disclosed concepts. The words used in the specification are words of description rather than limitation. The scope of the following claims is broader than the specifically disclosed embodiments and also includes modifications of the illustrated embodiments.
