Commercial vehicle body

Abstract

commercial vehicle body, with wall devices (4), such as wall elements or side tarpaulins, and with a roof tarpaulin (6) for defining a loading space (9), wherein a tarpaulin fastening device (8) is provided for fastening the roof tarpaulin (6), wherein a rear-side flow guide surface (14) is assigned to a rear (10) of the commercial vehicle body (2) in a roof area (12) of the commercial vehicle body (2), wherein the flow guide surface (14) is designed to reduce air resistance occurring during driving, characterized in that the flow guide surface (14) is part of the tarpaulin fastening device (8) for fastening the roof tarpaulin (6).

Description

The present invention relates to a utility vehicle structure, having wall devices, such as wall elements or side tarpaulins, and having a roof tarpaulin for delimiting a cargo space, wherein a tarpaulin fastening device is provided for fastening the roof tarpaulin, wherein a rear of the utility vehicle structure is assigned a rear-side flow guide surface in a roof region of the utility vehicle structure, wherein the flow guide surface is configured to reduce an air resistance which occurs during driving operation.It is known to provide a rear flow guide surface on a commercial vehicle structure for reducing an air resistance occurring during driving operation. Guide surfaces of this type can be mounted, for example, in a fixed, adjustable or pivotable manner on the rear of the commercial vehicle structure. Known systems are usually complex, cost-intensive constructions with vertical and horizontal, dynamically adjustable guide surfaces. In addition to the high initial costs, such systems also require regular maintenance, which leads to additional service lives of the relevant utility vehicle and to further costs.Against this background, the present invention is based on the technical problem of specifying an improved utility vehicle structure which enables a reduction in the air resistance during driving operation, wherein in particular a cost-effective, efficient design solution is intended to be provided. The above-described technical problem is solved by the features of claim 1. Further embodiments of the invention are evident from the dependent claims and the description below.According to the invention, a utility vehicle structure is specified, having wall devices, such as wall elements or side tarpaulins, and having a roof tarpaulin for delimiting a cargo space, wherein a tarpaulin fastening device is provided for fastening the roof tarpaulin, wherein a rear of the utility vehicle structure is assigned a rear-side flow guide surface in a roof region of the utility vehicle structure, wherein the flow guide surface is configured to reduce an air resistance which occurs during driving operation. The commercial vehicle structure is characterized in that the flow guide surface is part of the tarpaulin fastening device for fastening the roof tarpaulin.The integration of the flow guide surface into the tarpaulin fastening device enables a compact and cost-effective incorporation of the flow guide surface into the construction of the commercial vehicle structure. The flow guide surface is formed in particular in one piece or in one piece with the tarpaulin fastening device.It can be provided that the tarpaulin fastening device has a horizontal fastening section to which the roof tarpaulin is fixed. The roof tarpaulin can therefore be fastened or clamped in a horizontally planar manner in the region of the horizontal fastening section. It can thus be supported that the roof tarpaulin spans a substantially planar roof plane during driving operation.The horizontal fastening section can merge directly into the flow guide surface.According to one configuration of the utility vehicle structure, it can be provided that the tarpaulin fastening device extends over the entire vehicle width. The tarpaulin fastening device therefore holds the roof tarpaulin in position along the vehicle width. Likewise, the flow guide surface can extend over the entire vehicle width.It can be provided that the tarpaulin fastening device extends at least over half a width of the utility vehicle structure. Furthermore, it can be provided that the tarpaulin fastening device extends over at least 75% of the width of the utility vehicle structure. Preferably, it can be provided that the tarpaulin fastening device extends over at least 90% of the width of the utility vehicle structure. It can be provided that the tarpaulin fastening device extends laterally projecting beyond the width of the utility vehicle structure, such that the width of the tarpaulin fastening device is greater than the width of the utility vehicle structure. The width of the commercial vehicle structure can be, for example, 2550 mm.It can be provided that the roof tarpaulin is held on the tarpaulin fastening device in a form-fitting manner by means of a plurality of fastening elements, wherein the fastening elements penetrate the tarpaulin fastening device and the roof tarpaulin. The fastening elements can be bolts, pins, screws or rivets, for example.According to one configuration of the utility vehicle structure, it can be provided that more than ten and less than twenty fastening elements are provided and / or the fastening elements are arranged in a row distributed at equidistant distances along the vehicle width. Thus, a reliable, uniform fastening of the roof tarpaulin along the vehicle width can be achieved.It can be provided that the roof tarpaulin is held in a form-fitting manner on the tarpaulin fastening device by means of a piping strip. The piping strip is in a known manner a groove with an essentially annular groove cross section and with a slot, wherein the annular groove cross section is provided for positively holding an end thickening of the roof tarpaulin, while the tarpaulin material extending in a planar manner starting from the thickening penetrates the slot.It can be provided that the tarpaulin fastening device, viewed in a cross section, bears against a side of the roof tarpaulin facing a vicinity of the commercial vehicle structure and a portal beam bears against a side of the roof tarpaulin facing the cargo space, wherein the tarpaulin fastening device and the portal beam enclose an end section of the roof tarpaulin on two sides. The portal beam therefore secures or supports the roof tarpaulin in the vertical direction.According to one embodiment of the utility vehicle structure, it can be provided that the fastening elements penetrate the portal beam. The fastening elements therefore interact in a form-fitting manner with the portal beam and the tarpaulin fastening device in order to fix the roof tarpaulin. In addition, the roof tarpaulin can be braced by means of the fastening elements between the tarpaulin fastening device and the portal beam.It can be provided that the portal beam has a horizontal fastening section to which the roof tarpaulin is fixed and the portal beam has a vertical support section which extends in the direction facing away from the roof tarpaulin. The vertical support section can be arranged, as viewed in a cross section, in particular on the rear side of the region of a side of a door system of the utility vehicle structure facing the cargo space.According to one configuration of the utility vehicle structure, it can be provided that the vertical support section has a wavy cross section at least in sections.It can be provided that the portal beam is a sheet metal component. The sheet metal component can have a sheet metal thickness selected from a range of 1 mm-5 mm, in particular selected from a range of 1 mm-3 mm. The sheet metal component can have a sheet metal thickness of 2 mm.The portal beam can be assembled in modular fashion from two or more sheet metal components. The sheet metal components can be connected to one another in a releasable or non-releasable manner. The sheet metal components can be connected to one another by means of materially bonded, positively locking and / or frictionally locking connections. The sheet metal components can be connected to one another in particular by welding, riveting and / or screwing. The sheet metal components can have a sheet metal thickness selected from a range of 1 mm-3 mm. The sheet metal components can have a sheet metal thickness of 2 mm.It can be provided that the flow guide surface is inclined relative to a horizontal roof plane, wherein the flow guide surface has an orientation inclined downwards starting from the roof plane.According to one configuration of the utility vehicle structure, it can be provided that the flow guide surface encloses an angle greater than or equal to 10° with the horizontal roof plane, in particular encloses an angle greater than or equal to 15° with the horizontal roof plane, further in particular encloses an angle greater than or equal to 18° with the horizontal roof plane.Furthermore, it can be provided that the flow guide surface encloses an angle of less than or equal to 40° with the horizontal roof plane, in particular encloses an angle of less than or equal to 30° with the horizontal roof plane, further in particular encloses an angle of less than or equal to 24° with the horizontal roof plane.It can be provided that the horizontal roof plane is a roof plane delimiting the cargo space, wherein the flow guide surface is arranged at least in sections or completely below the roof plane when viewed in the vertical direction.In particular, it is provided that the flow guide surface is inclined and arranged in such a way that a total height of the utility vehicle structure in the region of the flow guide surface is reduced in accordance with the inclination of the flow guide surface.In other words, the flow guide surface forms a negative angle of attack with respect to an air flow during driving operation. While, for example, in the region of the engine port, rear-side flow guide surfaces are deliberately positioned with a positive angle of attack in the air stream in order to increase the contact pressure of the vehicle on the road, the opposite effect is to be achieved here precisely by the air stream being guided past the utility vehicle roof with the lowest possible resistance. Accordingly, in particular the lowest point of the flow guide surface is arranged at the rear end of the flow guide surface, while the highest point of the flow guide surface is located at an end of the flow guide surface facing away from the rear end of the flow guide surface and facing a driver's cab of a respective vehicle in the fully assembled state.According to alternative embodiments, it can be provided that the flow guide surface is arranged at least in sections or completely above the horizontal roof plane.It can be provided that the flow guide surface extends at least over half of a width of the utility vehicle structure. Furthermore, it can be provided that the flow guide surface extends over at least 75% of the width of the commercial vehicle structure. Preferably, it can be provided that the flow guide surface extends over at least 90% of the width of the commercial vehicle structure. It can be provided that the flow guide surface extends laterally projecting beyond the width of the utility vehicle structure, so that the width of the flow guide surface is greater than the width of the utility vehicle structure.The positive effect of the flow guide surface can be seen particularly clearly when the flow guide surface covers as large a part as possible of the width of the commercial vehicle structure. It is therefore preferred to extend the flow guide surface as far as possible along the entire width of the utility vehicle structure. The width or a corresponding width direction of the utility vehicle structure is oriented transversely or substantially perpendicularly to a longitudinal extent of the utility vehicle structure, wherein the longitudinal extent of the utility vehicle structure is oriented parallel to a direction of travel of a vehicle when traveling straight ahead in the fully assembled state.According to one configuration of the utility vehicle structure, it can be provided that the flow guide surface is extended projecting beyond a door system of the utility vehicle structure on the rear side, and in particular has a projecting length on the rear side of more than 30 mm, in particular has a projecting length of more than 50 mm, further in particular has a projecting length of more than 100 mm, in particular has a projecting length of less than 250 mm, in particular has a projecting length of less than 200 mm, in particular has a projecting length of less than 150 mm.It can be provided that the flow guide surface has a rear protrusion of greater than or equal to 128 mm and less than or equal to 148 mm.It can be provided that a vertically extending end section is arranged at each of the ends of the flow guide surface facing away from one another. Such a vertically extended end section can be a vertical guide element for optimizing the air flow, i.e. a so-called winglet.According to one embodiment of the utility vehicle structure, it can be provided that a respective tarpaulin cord of the roof tarpaulin is fastened to a respectively assigned vertical end section.It can be provided that the tarpaulin fastening device is a sheet metal component. The sheet metal component can have a sheet metal thickness selected from a range of 1 mm-5 mm, in particular selected from a range of 1 mm-3 mm. The sheet metal component can have a sheet metal thickness of 2 mm.The tarpaulin fastening device can be assembled in modular fashion from two or more sheet metal components. The sheet metal components can be connected to one another in a releasable or non-releasable manner. The sheet metal components can be connected to one another by means of materially bonded, positively locking and / or frictionally locking connections. The sheet metal components can be connected to one another in particular by welding, riveting and / or screwing. The sheet metal components can have a sheet metal thickness selected from a range of 1 mm-5 mm, in particular selected from a range of 1 mm-3 mm. The sheet metal components can have a sheet metal thickness of 2 mm.It can be provided that the tarpaulin fastening device is an extruded profile or has an extruded profile. In particular, it can be provided that the tarpaulin fastening device is an aluminium extruded profile. The extruded profile can have wall thicknesses in the range of 0.5 mm-5 mm. The extruded profile can have wall thicknesses of 1 mm-4 mm.The tarpaulin fastening device can be a tarpaulin fastening strip or can have a tarpaulin fastening strip.The tarpaulin fastening device can be assembled in modular fashion from a plurality of components. Thus, the tarpaulin fastening device can have, for example, a sheet metal component or a plurality of sheet metal components and / or an extruded profile or a plurality of extruded profiles. For example, the tarpaulin fastening device can have an aluminium extruded profile to which vertical end sections are fastened at the end as winglets.According to one embodiment of the commercial vehicle structure, it can be provided that the roof tarpaulin is folded over in the region of its longitudinal sides, such that the roof tarpaulin is laid twice along its longitudinal sides.It can be provided that the tarpaulin fastening device and the flow guide surface are rigid and cannot be adjusted during driving operation and / or an angle of the flow guide surface is not adjustable but is predefined in a structurally fixed manner.According to one configuration of the utility vehicle structure, it can be provided that no further rear-side flow guide surfaces are provided in addition to the flow guide surface, in particular that no vertical further rear-side flow guide surfaces are provided which cover more than one third of a vehicle height of the utility vehicle structure and are arranged on two sides in the rear-side door region and extend vertically.It can be provided that in addition to the flow guide surface, no further rear-side flow guide surfaces are provided, which are adjustable.The invention is described in more detail below with reference to a drawing illustrating exemplary embodiments. They show in each case schematically: FIG. 1 shows a partial view of a utility vehicle structure according to the invention in a perspective view; FIG. 2 shows a partial side view of the utility vehicle structure according to the invention from FIG. 1 ; FIG. 3 shows a partial cross-sectional view of the utility vehicle structure according to the invention from FIG. 1 ; FIG. 4 shows an enlarged detail of FIG. 3.FIG. 1 shows a partial view of a utility vehicle structure 2 according to the invention in a perspective view. To simplify the illustration, only the rear region of the utility vehicle structure 2 essential to the invention is shown.The utility vehicle structure 2 has walls 4 and a roof tarpaulin 6 for delimiting a cargo space 9. the utility vehicle structure 2 has a tarpaulin fastening device 8 for fastening the roof tarpaulin 6. The width direction B is oriented perpendicular to the longitudinal extent L of the utility vehicle structure 2.A rear 10 of the utility vehicle structure 2 is assigned a rear flow guide surface 14 in a roof region 12 of the utility vehicle structure 2. The flow guide surface 14 is configured to reduce an air resistance occurring during driving operation. The flow guide surface 14 is part of the tarpaulin fastening device 8 for fastening the roof tarpaulin 6.FIG. 2 shows a partial side view of the utility vehicle structure 2 according to the invention from FIG. 1. the flow guide surface 14 is inclined relative to a horizontal roof plane E which is spanned by the roof tarpaulin 6, wherein the flow guide surface has an orientation inclined downward proceeding from the roof plane E.In other words, the flow guide surface 14 is inclined and arranged in such a way that a total height G of the utility vehicle structure 2 in the region of the flow guide surface 14 is reduced in accordance with the inclination of the flow guide surface 14. The horizontal roof plane E is a roof plane delimiting the cargo space 9, wherein the flow guide surface 14 is arranged substantially below the roof plane E when viewed in the vertical direction.The flow guide surface 14 extends on the rear side beyond a door system 16 of the utility vehicle structure 2. The flow guide surface 14 has a rear protrusion D of more than 50 mm and less than 150 mm.As can be seen in FIG. 1 and in FIG. 2, a vertically extending end section 22 is arranged in each case at mutually remote ends 18, 20 of the flow guide surface 14. A respective vertical end section is arranged above the door system 16 and at a vertical distance a from the door system 16.A respective tarpaulin cord 24 of the roof tarpaulin 6 is fastened to a respectively associated vertical end section 22.FIG. 3 shows a partial cross-sectional view of the utility vehicle structure 2; FIG. 4 shows an enlarged detail of FIG. 3 ; the tarpaulin fastening device 8 has a horizontal fastening portion 26 to which the roof tarpaulin 6 is fixed.The roof tarpaulin 6 is held in a form-fitting manner on the tarpaulin fastening device 8 by means of a plurality of fastening elements 28. The fastening elements 28 penetrate the tarpaulin fastening device 8 and the roof tarpaulin 6.The fastening elements 28 are arranged in a row distributed along the vehicle width B at equidistant distances (cf. FIG. 1 ).The tarpaulin fastening device 8, as viewed in the cross sections of FIGS. 3 and 4, bears against a side 30 of the roof tarpaulin 6 facing an environment U of the utility vehicle structure 2.A portal beam 32 abuts a side 34 of the roof tarpaulin 6 facing the cargo space 9. The tarpaulin fastening device 8 and the portal beam 32 enclose an end section 36 of the roof tarpaulin 6 on two sides.The fastening elements 28 pass through the portal beam 32.The portal beam 32 has a horizontal fastening section 38 to which the roof tarpaulin 6 is fixed. The portal beam has a vertical support section 40 which extends in the direction facing away from the roof tarpaulin 6.The vertical support section 40 has a wave-shaped cross section at least in sections.The flow guide surface 14 encloses an angle w of approximately 18° with the horizontal roof plane E.The tarpaulin fastening device 8 is a sheet metal component with a wall thickness of 2 mm.The roof tarpaulin 6 is folded over in the region of its longitudinal sides 42, with the result that the roof tarpaulin is laid twice along its longitudinal sides 42.The tarpaulin fastening device 8 and the flow guide surface 14 are rigid and cannot be adjusted during driving operation. The angle w of the flow guide surface 14 is not adjustable, but is fixed in terms of design.In the present example, no further flow baffles on the rear side are provided in addition to the flow guide surface 14. For example, no vertical further rear-side flow guide surfaces are provided, which cover more than one third of a vehicle height G of the utility vehicle structure 2 and are arranged on two sides in the rear-side door region and extend vertically. For example, in addition to the flow guide surface, no further rear-side flow guide surfaces are provided, which are adjustable.

Claims

A utility vehicle structure, having wall devices (4) such as wall elements or side tarpaulins, and having a roof tarpaulin (6) for delimiting a cargo space (9), wherein a tarpaulin fastening device (8) is provided for fastening the roof tarpaulin (6), wherein a rear (10) of the utility vehicle structure (2) is assigned a rear-side flow guide surface (14) in a roof region (12) of the utility vehicle structure (2), wherein the flow guide surface (14) is configured to reduce an air resistance occurring during driving operation, characterized in that the flow guide surface (14) is part of the tarpaulin fastening device (8) for fastening the roof tarpaulin (6).Commercial vehicle structure according to Claim 1, characterized in that the tarpaulin fastening device (8) has a horizontal fastening section (26), to which the roof tarpaulin (6) is fixed.Commercial vehicle structure according to Claim 1 or Claim 2, characterized in that the tarpaulin fastening device (8) extends over the entire vehicle width.Commercial vehicle structure according to one of the preceding claims, characterized in that the roof tarpaulin (6) is held on the tarpaulin fastening device (8) in a positively locking manner by means of a plurality of fastening elements (28), the fastening elements (28) passing through the tarpaulin fastening device (8) and the roof tarpaulin (6).Commercial vehicle structure according to Claim 4, characterized in that more than ten and less than twenty fastening elements (28) are provided and / or the fastening elements (28) are arranged in a row distributed at equidistant spacings along the vehicle width (B).The utility vehicle structure according to any one of the preceding claims, characterized in that the tarpaulin fastening device (8), viewed in a cross section, bears against a side (30) of the roof tarpaulin (6) facing an environment (U) of the utility vehicle structure, and a portal beam (32) bears against a side (34) of the roof tarpaulin (6) facing the cargo space (9), wherein the tarpaulin fastening device (8) and the portal beam (32) enclose an end section (36) of the roof tarpaulin (6) on two sides.Commercial vehicle structure according to Claim 6 and according to one of Claims 4 or 5, characterized in that the fastening elements (28) pass through the portal beam (32).Commercial vehicle structure according to Claim 6 or Claim 7, characterized in that the portal beam (32) has a horizontal fastening section (38), to which the roof tarpaulin (6) is fixed, and the portal beam (32) has a vertical support section (40), which extends in the direction facing away from the roof tarpaulin (6).Commercial vehicle structure according to Claim 8, characterized in that the vertical support section (40) has a wave-shaped cross section at least in sections.Commercial vehicle structure according to one of the preceding claims, characterized in that the flow guide surface (14) is inclined relative to a horizontal roof plane (E), wherein the flow guide surface (14) has an orientation inclined downwards starting from the roof plane (E).Commercial vehicle structure according to one of the preceding claims, characterized in that the flow guide surface (14) encloses an angle (w) greater than or equal to 10° with the horizontal roof plane (E), in particular encloses an angle (w) greater than or equal to 15° with the horizontal roof plane (E), further in particular encloses an angle (w) greater than or equal to 18° with the horizontal roof plane (E), and / or in that the flow guide surface (14) encloses an angle (w) less than or equal to 40° with the horizontal roof plane (E), in particular encloses an angle (w) less than or equal to 30° with the horizontal roof plane (E), further in particular encloses an angle (w) less than or equal to 24° with the horizontal roof plane (E).Commercial vehicle structure according to one of the preceding claims 10 or 11, characterized in that the horizontal roof plane (E) is a roof plane (E) delimiting the cargo space (9), wherein the flow guide surface (14), as viewed in the vertical direction, is arranged at least in sections or completely below the roof plane (E).The commercial vehicle structure according to any one of the preceding claims 10 to 12, characterized in that the flow guide surface (14) is extended on the rear side projecting beyond a door system (16) of the commercial vehicle structure (2), and in particular has a rear-side projection (D) of more than 30 mm, in particular has a projection (D) of more than 50 mm, in particular has a projection (D) of more than 100 mm, in particular has a projection (D) of less than 250 mm, in particular has a projection (D) of less than 150 mm.Commercial vehicle structure according to one of the preceding claims, characterized in that a vertically extending end section (22) is arranged in each case on mutually remote ends (18, 20) of the flow guide surface (14).Commercial vehicle structure according to Claim 14, characterized in that a respective tarpaulin cord (24) of the roof tarpaulin (6) is fastened to a respectively assigned vertical end section (22).Commercial vehicle structure according to one of the preceding claims, characterized in that the tarpaulin fastening device (8) is a sheet metal component.Commercial vehicle structure according to one of the preceding claims, characterized in that the tarpaulin fastening device (8) is an extruded profile, in particular in that the tarpaulin fastening device (8) is an extruded aluminum profile.Commercial vehicle structure according to one of the preceding claims, characterized in that the tarpaulin fastening device (8) is a tarpaulin fastening strip or has a tarpaulin fastening strip.Commercial vehicle structure according to one of the preceding claims, characterized in that the tarpaulin fastening device (8) is assembled in modular fashion from a plurality of components.Commercial vehicle structure according to one of the preceding claims, characterized in that the roof tarpaulin (6) is folded over in the region of its longitudinal sides (42), with the result that the roof tarpaulin (6) is laid twice along its longitudinal sides.Commercial vehicle structure according to one of the preceding claims, characterized in that the tarpaulin fastening device (8) and the flow guide surface (14) are rigid and cannot be adjusted during driving operation and / or an angle (w) of the flow guide surface (14) is not adjustable but is predefined in a structurally fixed manner.The commercial vehicle structure according to any one of the preceding claims, characterized in that no further rear-side flow guide surfaces are provided in addition to the flow guide surface (14), in particular that no vertical further rear-side flow guide surfaces are provided which cover more than one third of a vehicle height of the commercial vehicle structure and are arranged on two sides in the rear-side door region and extend vertically and / or no further rear-side flow guide surfaces are provided in addition to the flow guide surface, which are adjustable.

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