Patent Application
20230182648
This application claims under 35 U.S.C. § 119(a) the benefit of the filing date of Danish Patent Application No. 202170615, filed on Dec. 14, 2021, the entire contents of which are incorporated herein by reference.
The invention relates to a roof rail for being mounting on a roof of a vehicle, such as an automobile.
The present invention relates to the field of automobile parts, in particular to roof rails (or roof racks or roof carriers) to be installed on a roof of an automobile vehicle. The roof rails are generally elongated with their longitudinal axis arranged along a line extending from the front of the vehicle to the back of vehicle, and further the vehicle typically includes two roof rails, one along each side thereof.
Typically the roof rails are hollow extruded profiles, which are often made from aluminum. Extruding other materials than aluminum, such as steel, is generally more difficult. Furthermore, intricate design features and thin walled sections are hard to produce by the extrusion method, since these sections can be prone to deformation. This in turn can compromise the properties, functionality and aesthetic appearance of the roof rail.
It is an object of the present invention to provide a rail profile for a roof rail with the aim of reducing material use, while maintaining sufficient rail profile strength and good functionality. It is a further object to provide a rail profile, which is of high aesthetic appearance.
A first aspect of the invention relates to a roof rail for a roof of a vehicle, including:
By providing a plurality of bends in a sheet material, the elongated rail profile may be readily shaped to a desired design. Furthermore, the type and design of the bends may prove to provide additional functionality or strength to sections of the roof rail, which can e.g., compensate for thin sheet thickness and prove advantageous in acquiring a rail profile of high durability and strength.
Advantageously, the folded flange wall potentially increases the strength of the roof rail along an edge portion thereof, which is beneficial in reliably securing loads to the roof rail, such as cross-bars etc. Moreover, during mounting of the rail profile, mounting parts may advantageously arranged to be forced towards the vehicle roof, potentially further increasing the angle of the folded wall by biasing the proximal portion, which in turn can force portions of the cover part inwards towards an interior space and provide an advantageous pre-stressing of the rail profile, thereby increasing the functionality and durability of the roof rail.
Additionally, the folded flange wall and the distal portion can provide a mounting space of a width and height between outer surfaces of the mounting part, which can accommodate elongated mounting strips, which during mounting may be sandwiched between the mounting part and the vehicle with the purpose of providing an interface between the vehicle and the roof rail, and optionally further to provide a seal and to protect the vehicle roof surface etc. The mounting part is preferably arranged so that the mounting strip is pressed against the mounting part, and in particular the distal portion(s) when the rail profile is mounted. The flange wall(s) are preferably separated from the roof vehicle, and preferably does not directly touch the roof vehicle, after the installation of the roof rail, e.g., an air gap may be provided between the flange walls and the roof of the vehicle. Thereby an aesthetically pleasing result is provided without potentially damaging the vehicle roof by clamping the flange walls against it.
In one or more embodiments, the mounting strip, or one or more further separate mounting strip(s), may extend between the roof of the vehicle and the flange walls. E.g., that mounting strip may extend in between mounting flange and the opposing part of the vehicle roof, preferably at both longitudinal sides of the roof rail. In one or more embodiments, the mounting strip may be wider than the width of the rail profile and for example extend from the outer surface of the cover part at the first side, below both flange walls and terminate at the outer surface of the cover part at the second side. The mounting strip may thereby fill the gap between the flange walls and the roof of the vehicle. The mounting strip may be designed to be thinner below the flange walls and thicker below the mounting part, alternatively the mounting strip may be of substantially uniform thickness, and may be paired with a mounting strip extending between the flange walls, e.g., as previously described.
In one or more embodiments, the rail profile is preferably mounted with a mounting strip, e.g., a cushioning/sealing element or the like, configured so that the flange walls are arranged with a distance less than 1 mm, such as less than 0.8 mm, or such as less than 0.5 mm after mounting on the roof vehicle. E.g., the mounting strip may be of a specific rigidity, flexibility, density and/or height.
In one or more embodiments, the mounting strip may be configured to provide a spacer between the rail profile and the vehicle, but may additionally be configured to provide dust-protection, sealing properties etc. In one or more embodiments, the mounting strip is made of a plastic material, such as rubber. The mounting strip may be flexible and comprising an un-biased height of below 6 mm, such as below 5 mm, or below 4 mm. alternatively, the mounting strip may be rigid.
In one or more embodiments, the mounting distance (H1) is between 0.5 mm and 6 mm, such as between 0.8 mm and 5.5 mm, such as between 1 mm and 5 mm, such as between 1.5 mm and 4.5 mm, or such as between 2 mm and 4 mm or such as between 2.5 mm and 3.5 mm. In one or more embodiments, the distance (H1) is at least 0.5 mm, such as at least 0.6 mm, such as at least 0.7 mm, such as at least 0.8 mm, such as at least 0.9 mm, such as at least 1.0 mm, such as at least 1.1 mm, such as at least 1.2 mm, such as at least 1.3 mm, such as at least 1.4 mm or such as at least 1.5 mm measured along the smallest distance between the distal portion(s) and a first plane (P1) including the lowermost parts of the flange walls. Advantageously, this provides enough space for proper mounting of the roof rail onto the vehicle roof. In one or more embodiments, the mounting distance (H1) is measured prior to fastening the roof rail onto a vehicle.
In one or more embodiments, the roof rail may include the mounting strip. The rail profile may additionally or alternatively also include a fastening or fastening means for fastening the roof rail on the vehicle. The fastening may be screws, bolts or any other fastening element suitable for secure fastening of the roof rail, e.g., through holes in the vehicle roof. Advantageously to the customer, the roof rail may be delivered with the fastening already attached, so that the customer can easily attach the roof rail to the vehicle.
In one or more embodiments, the inner surface of the proximal portions and the inner surface of the edge portions and/or the inner surface of the distal portion(s) is the surface facing an interior space enclosed by the cover part and the mounting part.
In one or more embodiments, the first angle and/or the second angle is/are a sharp angle.
In one or more embodiments, the first angle is a sharp angle while the second angle is an obtuse angle, such as between 90-150° or such as between 100-140° or between 110-130°. The first angle may be between 0-60°, such as between 20-50° or such as between 30-45°.
In one or more embodiments, the first angle may be less than 90°, such as less than 80°, such as less than 70°, such as less than 60°, such as less than 50°, such as less than 40°, such as less than 30°, such as less than 20° or such as less than 10°. In one or more embodiments, the first angle may be equal to or above 0°, such as between 0-10°.
In one or more embodiments, the second angle may be less than 90°, such as less than 80°, such as less than 70°, such as less than 60°, such as less than 50°, such as less than 40°, such as less than 30°, such as less than 20° or such as less than 10°. In one or more embodiments, the second angle may be equal to or above 0°, e.g., between 0-10°. The angles are stated as positive values independent on whether the angle is measured from the proximal portion to the edge portion or from the edge portion to the proximal portion, i.e., clockwise or anti-clockwise direction. The first and second angles are measured when the rail profile is in a non-biased, un-mounted condition. In one or more embodiments, 0° means that the edge portion is arranged parallel with the neighboring first proximal portion.
In one or more embodiments, the proximal portion is arranged to extend upwards from the lowermost part of the flange wall (at the first plane), wherein upwards is generally towards the top side of the cover part. Optionally the proximal portion is further arranged to extend towards the opposite edge portion, e.g., into the cavity covered by the cover part. Advantageously, this provides a mounting height H1 between the first plane and the distal portion(s). In one or more embodiments, the proximal portion(s) extends from the first plane towards the inner surface of the cover part and away from the first plane.
In one or more embodiments, the mounting part is contiguous with the cover part, e.g., at both sides of the cover part or at one side of the cover part. The contiguous property is generally understood to be provided by providing the cover part and the mounting part in the same sheet material, preferably separated by a bend. Advantageously, the contiguous connection can reduce the occurrence of weak points in the structure.
In one or more embodiments, a first bend in the first sheet material is provided between the first edge portion and the first proximal portion, e.g., the first flange wall includes said first bend providing the first angle. In one or more embodiments, a second bend in the first sheet material is provided between the second edge portion and the second proximal portion, e.g., the second flange wall comprises said second bend providing the second angle. In one or more embodiment, the rail profile includes both the first bend and the second bend.
Advantageously, the contiguously arranged portions separated by a bend in the sheet material of the rail profile can add a certain degree of resiliency, which has the useful effect of potentially pre-stressing the profile without the need for adding more or stronger material.
Additionally, the resiliency at bends of the rail profile, provides a rail profile, which may restore its equilibrium state after demounting whereby the rail profile can be re-used. Additionally, the bend(s) can potentially distribute energy provided by impact forces on the rail profile in a less damaging way compared to more straight connections, so as to provide a more durable rail profile.
In one or more embodiments, the distal portion(s) are configured to provide a connection between the rail profile and the vehicle, and may be of a suitable transverse cross-sectional shape and orientation suitable for this purpose. The distal portion may be configured to provide contact surface(s) to ensure proper engagement with a fastening means and/or a base profile. E.g., the distal portion(s) may include one or more inward directed protrusions. Advantageously, the distal portions eases the process of proper attachment between the roof rail and the vehicle. The distal portion may be provided with one or more bends, which, e.g., may increase the strength of the distal portion.
In one or more embodiments, the dominant direction/orientation of the distal portion(s) is angled from the first plane by less than 15 degrees, such as less than 10 degrees or such as less than 5 degrees. E.g., the orientation may be substantially arranged in parallel with the first plane. The orientation may thereby provide a suitable contact surface for attachment to the vehicle roof.
In one or more embodiments, the orientation of the edge portions in a transverse cross-section of the rail profile are angled with respect to the first plane. Advantageously, this provides an aesthetically pleasing rail profile and may further increase the functionality of the rail profile. The edge portions may optionally be orientated substantially along the same direction from the lowermost parts of the flange walls.
In one or more embodiments, the first angle may be less than the second angle, such as at least 10 degrees, or such as at least 15 degrees less than the second angle, or such as at least 20 degrees less than the second angle, or vice versa. This may advantageously provide a tilted rail profile, in which the edge portions are angled relative to the first plane and which provides a dominant orientation of the general extent of the distal portion(s) being angled at 0-20 degrees relative to the first plane, such as substantially parallel to the first plane, e.g., substantially horizontal orientation. A tilted rail profile, when viewed in a transverse cross-section thereof, may provide the advantages of increase functionality in terms of receiving and holding elements on to the rail profile, e.g., a cross-bar with attachment arrangements engaging the rail profile on each side thereof. Additionally, the tilted cross-section may additionally provide advantages in terms of aesthetic appearance and/or aerodynamic properties. In one or more embodiments, the rail profiles are mounted on the vehicle, so that they are tilted towards each other.
In one or more embodiments, the one or more distal portion(s) include a first distal portion contiguous with the first proximal portion at a first end of the first distal portion.
In one or more embodiments, the roof rail includes a single first distal portion being contiguous with the first or second proximal portion and extending towards and opposite proximal portion. In one or more embodiments, the first distal portion may also fixed to the opposite proximal portion, e.g., by a suitable connecting method, such as by welding or gluing. The embodiment may provide a transverse cross-section of the rail profile, which is fully enclosed. It is understood that mounting apertures may be provided, e.g., in or through the distal portion, for attaching the roof rail to a vehicle. Advantageously, the fully enclosed rail profile provides for added structural strength of the rail profile itself, and further seals the interior space of the rail profile.
In one or more embodiments, the one or more distal portion(s) further include a second distal portion contiguous with the second proximal portion at the first end of the second distal portion.
In one or more embodiments, the first ends of the distal portions are fixed to the proximal portions at a second end of the proximal portion being opposite to a first end of the proximal portion being fixed to the edge portion.
In one or more embodiments, the rail profile may be arranged with two distal portions at each folded flange wall, which distal portions may or may not be connected at second ends of the distal portions, the second end being opposite the first end of the distal portion.
In one or more embodiments, a first distal portion extends towards a first side of the cover part, and/or a second distal portion extends towards a second side of the cover part, wherein the first side of the cover part includes the first edge portion and the second side of the cover part includes the second edge portion. In one or more embodiments, the distal portion(s) are arranged so that it extends towards the oppositely arranged edge portion of the cover part. This may provide suitable contact surfaces for engaging the rail profile at both sides thereof.
In one or more embodiments, the distal portions, such as the second ends of the distal portions, may be spaced apart by a bottom opening width (W2) so as to create and bottom opening separating the interior space of the rail profile and the outside environment of the rail profile. The bottom opening may be defined along the smallest gap between the distal portions. A bottom opening may be advantageous for allowing an easier access to the interior of the cavity, e.g., during mounting of the rail profile by a fastening or so as to introduce structural support in the cavity if needed, etc.
In one or more embodiments, the first and second distal portions may be similar in shape and arranged in mirrored configuration generally about the center of the bottom side of the rail profile, e.g., through a vertical plane extending through the center of a bottom opening and/or through a connection provided between the distal portions.
In one or more embodiments, the first proximal portion is contiguous with the first edge portion and/or wherein the second proximal portion is contiguous with the second edge portion.
In one or more embodiments, the first proximal portion may be contiguous with both the first distal portion and the first edge portion and/or the second proximal portion may be contiguous with both the second distal portion and the second edge portion. The contiguously connected folded flange wall(s) provides increased homogeneity of the roof rail, and may further provide increased resiliency at the first and second angles, which may potentially increase the durability of the rail profile as described previously.
In one or more embodiments, the first proximal portion is connected to the first edge portion by a jointed connection, e.g., glued or welded connection and/or wherein the second proximal portion is connected to the second edge portion by a joined connection, e.g., glued or welded connection.
In one or more embodiments, the rail profile may be joined, such as welded or glued, at the interface between one or more neighboring/abutting proximal portions and the edge portions, at one or more folded flanges of the rail profile, e.g., at the bottom of the folded flange wall and/or along abutting parts of the proximal portion and edge portion.
In one or more embodiments, the rail profile provides a fully enclosed interior space, e.g., provided by a joined connection.
Advantageously, this can increase the structural strength of the rail profile and make it more resistant to deformation. Furthermore, it can provide a seal of the interior of the roof rail.
The fully enclosed space is provided in the transverse cross-section of the elongated rail profile and may be provided by a suitable joining method, preferably by a welded connection, e.g., including a weld line, which may be extending along the longitudinal extent of the rail profile.
In one or more embodiments, the first distal portion is fixed to the second proximal portion, e.g., by a suitable joining method, e.g., providing a welded or a glued joint, at a second end of the first distal portion, and/or the second distal portion is fixed to the first proximal portion, e.g., by a connection, e.g., welded or glued joint, at a second end of the second distal portion.
In one or more embodiments, the second ends of the distal portions may be fixed by a suitable joint, e.g., welded or glued joint, preferably extending along the majority of the longitudinal extent of the rail profile.
In one or more embodiments, the first edge portion may be fixed to the first proximal portion and/or the second edge portion may be fixed to the second proximal portion.
In one or more embodiments, the glued joint may be an UV adhesive which cured by being irradiated by UV-light.
In one or more embodiments, the folded flange is an open folded flange including an intermediate portion, which at a first end thereof is connected to an edge portion and at a second end thereof is connected to proximal portion, such that an intermediate distance is provided between the edge portion and the proximal portion.
By providing an intermediate portion, the width of the mounting space may be controlled and be dependent on the intermediate distance. The intermediate portions may provide increasing sealing capabilities between the mounting space and the environment outside the roof rail.
In one or more embodiments, the folded flange is an open folded flange comprising an intermediate portion, which at a first end thereof is connected to an edge portion via a first intermediate bend and at a second end thereof is connected to proximal portion, via a second intermediate bend, such that an intermediate distance is provided between the edge portion and the proximal portion.
Advantageously, by providing an intermediate portion, the risk of damaging the appearance of the outer surface of the cover part is decreased as some methods of bending the sheet material may produce dents in the cover part. By allowing an intermediate distance (D1) in the folded flange, dent in the cover part may potentially be completely avoided. Additionally, by providing an intermediate portion and separating the first/second bend into two intermediate bends, the material at the bends are stretched to a smaller degree.
In one or more embodiments, the intermediate distance (D1) may be between 0.3-6 mm, such as between 0.4-5 mm, such as between 0.5-4 mm, or such as less than 0.5 mm, less than 1 mm, less than 2 mm, less than 3 mm, less than 4 mm, less than 5 mm or less than 6 mm. The intermediate distance may be the smallest distance provided between the inner side of the edge portion and the inner side of the proximal portion, e.g., along an inner surface of the intermediate part.
In one or more embodiments, the proximal portion and/or the edge portion and/or the distal portion and/or the intermediate portion may be curved, however, preferably, at least the majority of the proximal portion and/or the edge portion and/or the distal portion and/or the intermediate portion may be substantially straight/planar. In one or more embodiments, the inner surface of the intermediate portion is the surface facing an interior space enclosed by the cover part and the mounting part.
In one or more embodiments, the rail profile includes only one jointed connection, e.g., welded connection, such as a weld line, positioned either in a folded flange wall, e.g., in a proximal portion, or in a distal portion or any other portions of the mounting flange, such as an intermediate portion. Preferably, there is no joints, e.g., weld line(s) in the cover part. For purposes such as decreasing the efforts needed to manufacture the rail profile, the present rail profile may only need a maximum of one joint, e.g., weld line, to create the product, as the sheet material is provided with bends forming the rail profile from a single material sheet. This further ensures sufficient homogeneity of the material properties, such as strength in rail profile. Advantageously, the joint may additionally be hidden by the present invention, further making it easier provide an aesthetically pleasing rail profile.
In one or more embodiments, the folded flange wall is a flush folded flange wall having the inner surface of the proximal portion arranged substantially in parallel with the inner surface of the edge portion.
Advantageously, the flush folded flange wall may provide increased strength and support of the wall, due to a double layer of sheet material arranged side by side.
The flush folded flange wall may further maximize the width of the space provided between the folded flange walls, which may be utilize for fastening elements, mounting strips or other elements during mounting of the roof rail.
In one or more embodiments, the proximal portion is arranged substantially in parallel with the edge portion at least along a distance from the lowermost part of the flange wall.
In one or more embodiments, the proximal portion may be substantially parallel with the edge portion, and they may additionally be arranged so that they are abutting.
In one or more embodiments, the mounting part includes a third bend arranged at an interface between a proximal portion and a distal portion. The third bend may advantageously direct the first sheet material further into the interior space covered by the cover part, e.g., between the cover part and the first plane, so that the material creates a contact surface to be gripped and retained during mounting of the roof rail.
In one or more embodiments, the third bend may be provided so that the dominant orientation of the distal portion extents majorly horizontal, when the roof rail is arranged on the vehicle. Advantageously, this provides a suitable contact surface for engaging with a fastening upon installment of roof rail. The distal portion may be of a non-planar transverse cross-sectional shape, in which case, the dominant orientation of the distal portion may be provided by a line including the two connection points between the distal portion(s) and the proximal portions, e.g., a first and second end of a distal portion extending from the first proximal portion to the second proximal portion. In one or more embodiments, the third bends may be provided in a second plane being parallel to the first plane. Majorly horizontal is generally understood as meaning more horizontal, e.g., parallel with the nearby roof of the vehicle, than vertical.
In one or more embodiments, the mounting part includes a third bend arranged at an interface between a proximal portion and a distal portion, and wherein the third bend is provided at a third angle being an obtuse angle measured between the inner surface of the proximal portion and an inner surface of the distal portion.
Advantageously, this may allow for suitable orientation of the distal portion in order to ensure a good contact surface for mounting the roof rail to the vehicle, e.g., by providing a generally orientation of the distal portion being majorly horizontal. In one or more embodiments, the obtuse angle is provided so that the first sheet material is transferred from an orientation being substantially angled with respect to the first plane to being majorly parallel to the first plane, e.g., based on the dominant orientation of the distal portion(s). The angle provided may generally be calculated based on the orientation of the proximal portion to which the distal portion is connected. In one or more embodiments, the obtuse angle is between 180° and 360°, such as between 190° and 350°, such as between 210° and 320°, such as between 230° and 300° or such as between 205° and 280°. Alternatively, the third angle may be a sharp angle, such as between 10 and 80°, such as between 25° and 65° or such as between 40° and 50°. E.g., the adjacent first/second angle in the first sheet material may be between 30° and 65° and the third angle may be a sharp angle, such that the first distal portion and/or second distal portion is extending from the third bend towards the first side of the cover part and/or second side pf the cover part, respectively.
The angles are stated as positive values independent on whether the angle is measured from the proximal portion to the distal portion or from the distal portion to the proximal portion, i.e., clockwise or anti-clockwise direction. The third angles are measured when the rail profile is in a non-biased, un-mounted condition.
In one or more embodiments, the third bend is provided between the first proximal portion and the first distal portion and/or the second proximal portion and the second distal portion. The value for the third angle may be the same of different between the first distal portion and the first proximal portion compared to the second distal portion and the second proximal portion.
In one or more embodiments, the roof rail further includes a base profile made of a second sheet material, and wherein the base profile is arranged to extend across a bottom opening extending between distal portions of the mounting part. Alternatively, the bottom opening may extent between a distal portion and a proximal portion.
In one or more embodiments, the roof rail further includes a base profile made of a second sheet material, and wherein the base profile is arranged to extend across at least a part of the first and second distal portions and across a bottom opening extending from the first distal portion to the second distal portion.
In one or more embodiments, the base profile includes one or mounting apertures for mounting the base profile to the vehicle. The base profile may be provided as an addition to the mounting part for mounting the roof rail onto the vehicle.
In one or more embodiments, the base profile of a longitudinal extent being at least 50%, such at least 75%, or such as at least 85% of the longitudinal extent of the elongated rail profile. The base profile may have a longitudinal center point coinciding with longitudinal center point of the rail profile. The base profile may be arranged approximately symmetrically about the center point of the elongated rail profile.
In one or more embodiments, the mounting part, e.g., the distal portion includes one or more further bends, such as a fourth, fifth, sixth, seventh, eighth, ninth and/or tenth bend or more. The further bends may be arranged to add structural strength to the distal portion, to support the cover part and/or to increase the engagement and support for the fastening means and/or base profile. The further bends may be arranged to provide one or more inward protrusions protruding towards the interior space of the rail profile.
In one or more embodiments, the first sheet material and/or the second sheet material is a material of uniform sheet thickness, measured between opposite major surfaces of the sheet material. The sheet material(s) may preferably be of much larger width and length than the thickness thereof. The sheet material(s) may be a homogenous sheet material between surfaces thereof.
In one or more embodiments, the first sheet material is made of metal, such as steel, preferably stainless steel, for example a chromium-nickel stainless steel material.
In one or more embodiments, the second sheet material is made of metal, such as steel, preferably stainless steel, for example a chromium-nickel stainless steel material. In one or more embodiments, the first sheet material and the second sheet material may be made of the same, similar or different materials. E.g., the first sheet material may be made of stainless steel, while the second sheet material may be made of aluminum or thermoplastic material.
In one or more embodiments, the metal material may be aluminum or an alloy. Steel material may provide some advantages as compared to, e.g., aluminum, as the steel material may be harder and may allow for a more cost efficient solution. Furthermore, the surface of steel is typically easy to make aesthetically pleasing, e.g., by polishing, coating etc. Stainless steel material, such as chromium-nickel stainless steel material, provides increased corrosion resistance. Stainless steel is more corrosion resistant and thus, when applying a coating layer such as chrome plating, painting or the like on the rail profile to reach the desired visual end result, the rail profile with the coating may be more wear and/or weather resistant over time and the coating may be longer lasting.
In one or more embodiments of the present disclosure, the steel material includes at least 12% by weight of chrome (Cr). Such steel material may be especially corrosion resistant. In one or more embodiments of the present disclosure the steel material may be a SUS 304 (Japanese Industrial Standards (JIN)) grade steel or a SUS 304L grade 20 steel. In embodiments, the steel may be a DIN EN-2-X5CrNi18-10 steel.
In one or more embodiments, the rail profile may need less or almost no subsequent treatment of the outer surface of the cover part in order to provide the desired design and surface smoothness. In one or more embodiments, the cover part may be provided with a removable protective sheet, such as foil, so as to protect the outer surface thereof during transport/mounting of the roof rail.
In one or more embodiments, the first sheet material is made of a thermoplastic sheet material, such a thermoplastic composite sheet material, e.g., a fiber reinforced thermoplastic composite material.
Thermoplastic composite material provides some advantages in being a lightweight alternative to metal, which additionally offers excellent formability, corrosion resistance, durability and strength. The thermoplastic material may further provide reduced investment cost, e.g., compared to steel and higher recyclability.
Thermoplastics, or thermosoft plastics, are generally plastic polymer materials that become moldable/bendable at certain elevated temperatures and solidifies upon cooling. A composite is generally a material produced from two or more constituent materials. In one or more embodiments, the thermoplastic composite includes a polymer material and a fiber reinforcement, such as synthetic and/or natural fibers, e.g., aramid (aromatic polyamide) or carbon fibers. In one or more embodiments, the thermoplastic is a laminate structure including woven reinforcement layer(s).
In one or more embodiments, the thermoplastic material may be shaped to form the roof rail, e.g., rail profile and/or base profile, by a roll-forming method, such as a roll-forming method applying heat and/or pressure in or prior to shaping of the bends of the roof rail. Portions of thermoplastic composite material may be fixed to each other by a joining method, such as by welding or gluing.
In one or more embodiments, the first sheet material is of a sheet thickness (T1) between 0.2 mm to 1.4 mm, such as between 0.3 mm and 1.2 mm, preferably between 0.4 mm and 1.0 mm.
Such general sheet material thicknesses may allow for desirable design options, and at the same time, provide a cost-efficient solution. In one or more embodiments, a design of rail profile walls of thermoplastic composite material or metal, such as steel, e.g., stainless steel profiles may have a wall thickness between 0.2 mm and 1.0 mm such as between 0.3 mm and 0.9 mm, preferably between 0.4 mm and 0.8 mm, which may be made smooth and precise enough, e.g., by means of roll forming methods.
The material of the rail profile may in other embodiments of the present disclosure a wall thickness between 0.2 mm and 3 mm such as between 0.3 mm and 1.5 mm. This may, e.g., be relevant if the rail profile material is aluminum alloy material or another material softer than stainless steel, but it may also apply for stainless steel profiles or thermoplastic composite profiles. In one or more embodiments, the thermoplastic profiles may have a wall thickness between 1-5 mm, such as between 2-4 mm or such as between 3-4 mm.
In one or more embodiments, it is generally understood that the rail profile and/or the base profile are not extruded or pultruded profiles.
In one or more embodiments, the rail profile is provided by the first sheet material comprising a plurality of bends produced by employing a roll-forming method.
Roll-forming is an efficient technology for forming a sheet material, such as metal sheet material or thermoplastic sheet material, into an elongated profile, such as tube or generally u-shaped profile. Generally, the roll forming process involves gradual deformation of the sheet material, which is fed through a series of the rolls. The roll forming method can be provided as a continuous or semi-continuous process allowing for high efficiency and cost advantages and may be particular suitable for mass production. Additionally, the roll forming method may quickly changes to produce different roll-formed results providing a method of high versatility. It may be as simple as engaging or not engaging a roll in the production line.
Roll-forming may involve less tooling cost, e.g., compared to compression moulded processes. Additionally, the roll forming process may allow for higher material utilization and reduction of scrap material, e.g., with scrap factors of down to 3% compared to scrap factors of down to 15% for stamped products.
Advantageously, the roll forming method allows for forming the folded flange walls to a high degree of precision and with the possibility of providing a wide range of first/second angles, e.g., down to 0 degrees, i.e. parallel arranged edge portion and proximal portion.
In one or more embodiments, the initial substantially flat 2-dimensional sheet material is gradually deformed and shaped through a series of rolls, which produces a 3-dimensional shape with longitudinal bends. The sheet material may be the first or second sheet material. In one or more embodiments, a roll forming process provides the first, second, third and/or further bends of the rail profile. In one or more embodiments, all bends of in the first sheet material is performed by roll-forming method.
In one or more embodiments, the roll-forming method employs a minimum of 10 rolls, such as a minimum of 12 rolls, such as a minimum of 15 rolls for making bends in the profile(s). For the base profile, a minimum of 8 rolls, such as a minimum of 10 rolls may be used. For the rail profile a minimum of 10, such as a minimum of 15 or preferably a minimum of 20 rolls is used. The application of such a large number of rolls makes it easier to provide the intricate design features of the profiles, such as the flange walls. In one or more embodiments, the bends of the rail profiles are provided by between 10 and 40 rolls, such as between 15 and 35 rolls, or such as between 20 and 30 rolls.
In one or more embodiments, the roof rail is of the type being an integrated rail. This generally means that the roof rail is installed so as to appear to be in contact with the roof of the vehicle along substantially entire longitudinal extent of the roof rail. The elongated rail profile may be arranged along the longitudinal direction of the car, provided from the front of the car to the back of the car.
In one or more embodiments, the roof rail includes a curved longitudinal center-axis, which may be provided by bending the rail profile, e.g., at each end thereof, towards the bottom side of the rail profile. The bottom side generally includes the mounting part, or base profile and/or the bottom of the folded flange walls. This may provide advantages to the aerodynamic properties of the roof rail and further increase its aesthetic appearance.
The curved shape preferably provides a generally open roof rail ends directed towards the roof of the vehicle. The openings of the open ends may preferably be arranged in parallel with the opposing part of the roof of the vehicle, when the roof rail is installed thereon. The longitudinal bending of the roof rail may be provided by any mechanical shaping methods, such as a stretch-bending or a roll-forming method and preferably a subsequent cutting process. The cutting process may produce a longitudinal extent of the flange wall and/or mounting part (and optionally the base part) which is shorter than the maximum longitudinal extent of the cover part. The edges at the open ends of the roof rail may be rounded by grinding and/or polished.
In one or more embodiments, filler part may optionally be provided in the rail profile cavity at the open ends thereof, so as to support the roof rail and decrease the risk of deformation of the shape of the rail profile at ends thereof. The filler part may be arranged between the mounting part and the cover part along the longitudinal direction of the roof rail, e.g., such that it extends over the open end of the roof rail facing the vehicle roof, i.e., the mounting part (and the optional base profile) may be shorter in longitudinal extent than the cover part.
In one or more embodiments, the elongated rail profile is configured to be mounted on a roof, e.g., by a fastening provided through the roof. The fastening may include stud bolts and/or screws and/or threaded rings, e.g., with O-ring seals and/or dust-protection, which may be pre-mounted in position through mounting apertures in the roof rail. In one or more embodiments, support brackets may additionally be provided in the interior space of the roof rail, e.g., in positions configured for attachment of a load, so as to increase the strength of the roof rail.
In one or more embodiments, the folded flange wall may be provided with coinciding apertures in a neighboring proximal portion and edge portion at side(s) of the rail profile, for securing loads to the roof rail. Additionally or alternatively, the cover part of the roof rail may be shaped with one or more retainer bends, provided by forming one or more protrusions by one or more bends, so that load may be retained by fixing against the retainer surfaces.
A second aspect of the invention relates to an elongated rail profile made of a first sheet material including a plurality of bends,
The rail profile according to the second aspect may include any of the features and benefits according to any embodiment(s) of the first aspect of the invention.
A third aspect of the present invention further relates to a method of providing rail profile according to the first aspect, wherein the method includes the step of preforming a roll-forming process on a first sheet material in order to form the rail profile, wherein the roll-forming process involves the application of one or more roll(s) in providing a plurality of bends in the first sheet material.
Aspects of the present disclosure will be described in the following with reference to the figures in which:
In relation to the figures described below, where the present disclosure may be described with reference to various embodiments, without limiting the same, it is to be understood that the disclosed embodiments are merely illustrative of the present disclosure that may be embodied in various and alternative forms. The figures may not be to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for, e.g., teaching one skilled in the art to variously employ the present disclosure.
A first group of figures containing
Between the cover part 30 and the mounting part 40, e.g., at each side of the cover part 31, 32, the rail profile 2 includes a flange wall 71, 72 made by an edge portion 33, 34 and a neighboring proximal portion 41, 51, and providing a first angle α1 between inner surfaces of the neighboring first edge portion 33a and first proximal portion 41a and a second angle α2 between inner surfaces of the neighboring second edge portion 34a and second proximal portion 51a. In one or more examples, the first angle α1 and second angle α2 are preferably both sharp angles, e.g., between 0 degrees and 80 degrees, or such as between 0-50 degrees for the first angle α1 and between 0-85 degrees for the second angle α2, so that the proximal portion 41, 51 extents upwards and inwards into the interior space 4 covered by the cover part 30. In
The roof rail 1 further includes a distal portion 42, wherein the distal portion 42 is arranged to provide a contact surface as a mounting platform for fixing the rail profile 2 to the roof of the vehicle. The contact surface may include an inner surface of the distal portion 42a and/or outer surface of the distal portion 42b. Due to the first angle α1 and second angle α2, a mounting space 5 is provided and the distal portion 42 can be arranged with a minimum distance (H1) from the roof of the vehicle when installed, wherein the minimum distance (H1) is measured between a first plane P1 including the lowermost parts of the flange walls 75, 76 and an outer surface of the distal portion 42b, see e.g.,
Additionally, by the flange wall 71, 72, the roof rail 1 is arranged so that upon fixing the rail profile 2 to the roof of the vehicle by applying a fixation force to the contact surface 42a, 42b towards the vehicle roof, the roof rail 2, e.g., in particularly in the cover part 30, may become pre-stressed increasing the strength of the roof rail 1.
The above-mentioned features described in relation to the example of
In
In
In
In
In
In one or more embodiments, the transverse cross-section of the elongated rail profile 2 includes a plurality of bends made in the first sheet material 20. The first angle α1 may be provided by a joined connection or by a first bend 61 provided between contiguously arranged first proximal portion 41 and first edge portion 33, and/or the second angle α2 may be provided by a joined connected or by second bend 62 between contiguously arranged second proximal portion 51 and second edge portion 34. An example of a rail profile 2 including both a first and second bend 61, 62 is for example shown in
The rail profiles may further includes a third bend 63 at an interface between a proximal portion 41, 51 and a distal portion 42, 52, see e.g.,
In
In
In
The outer surface of the intermediate portions 45b, 46b are arranged to be directed towards the vehicle roof when the roof rail is installed while the inner surfaces of the intermediate portions 45a, 46a are directed towards the interior space 4 and may aid in enclosing the space 4. An intermediate upper space 4a provided between inner surfaces of the edge portion and the proximal portion of an open folded flange wall 73a, 74a may accommodate a fastening (not shown) and aid in securely fastening the rail profile 2 of the roof rail 1 to a vehicle and/or it may accommodate support elements (not shown) for supporting the sides of the cover part 31, 32.
The intermediate portions 45, 46 may be arranged extending in the first plane P1 comprising the lowermost parts of the flange walls 75, 76, as seen in
In
The roof rails 1 of
In the present examples, and as indicated in
As seen in
The base profile 3 of
In
However, the base profile may also advantageously be shaped so as to add structural support to one or more sides of the cover part 31, 32, such as the second side of the cover part 32, e.g., as seen in
The roof rails 1 may further include mounting apertures 95, as seen in
In
In the present example of
In
The base profile 3 of
As seen in
In
The flange walls 71, 72 of the examples of
The mounting strip 80 may be elongated, may include one or more filler elements and/or cushioning elements and/or dust protection elements and/or sealing elements and may be made of a rigid or flexible material, such as plastic or rubber. As seen in
The first sheet material 20 and/or the second sheet material 25, may be a stainless steel plate material, e.g., of a uniform sheet thickness T1 between 0.3 mm to 1.1 mm, such as between 0.4 mm and 0.9 mm, preferably between 0.5 mm and 0.8 mm prior to roll forming. Alternatively or additionally, one or both sheet material 20, 25 may be made of a thermoplastic composite material. The sheet thickness of the thermoplastic composite sheet material may be 3-4 mm. The sheet thickness T1 is measured between coinciding inner and outer surfaces of the sheet material 20, an example is shown in
The shape of the cover part between the first and second angle may be of any shape suitable for accommodating attachment of elements onto the roof rail, such as cross-bars, bicycle racks etc., and/or further may be aesthetic pleasing appearance and/or of aerodynamic advantage.
As seen in
The first retainer angle α_r1 may be below 100 degrees, such as below 90 degrees or such as below 80 degrees, measured between the outer surfaces of the cover part 30b on each side of the first retainer angle α_r1. The second retainer angle α_r1 may be above 190 degrees, such as above 250 degrees, or such as above 270 degrees, measured between the outer surfaces of the cover part 30b on each side of the second retainer angle α_r2. The roof rail 1 may in embodiments include more than one retainer protrusion, e.g., a retainer protrusion may be provided on each side of the cover part 31, 32.
As seen in
The shown orientations in the examples are generally the expected orientation of the roof rail when installed on a roof of a vehicle. The bends mentioned herein, are generally elongated bends extending along the longitudinal extent of the roof rail. The roof rail may include further elongated crests/ridges, e.g., on the exterior surface not mentioned in the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| PA 2021 70615 | Dec 2021 | DK | national |
