A low-drag roof assembly for a cargo bed, a cargo bed, and a vehicle

Abstract

The utility model provides a low wind resistance roof assembly of goods compartment, including the lid body, the top of lid body has a plurality of with the vehicle advancing direction parallel strip convex, the edge beam is installed in the four -around of lid body, the edge beam of lid body front side, left side and right side has the arc fairing, the vault subassembly is installed on edge beam, and is located below lid body, is used for forming the arc structure with middle high, four low of vaulting up lid body to lid body. The utility model can solve the technical problem that the existing goods compartment roof cover is not conducive to reducing wind resistance, is difficult to satisfy the new energy vehicle to the wind resistance coefficient requirement.

Description

Technical Field

[0001] This utility model relates to the field of freight car technology, and in particular to a low wind resistance top cover assembly for a freight car. Background Technology

[0002] New energy-powered freight vehicles are one of the current directions for the development of freight vehicles. New energy freight vehicles need to comprehensively consider the impact of various factors on energy consumption, among which the drag coefficient of the vehicle body during driving is one of the research directions.

[0003] The existing cargo truck roof assembly is constructed by welding together multiple corrugated sheets, which are then welded laterally to the sides of the truck body. The roof assembly is then fully welded to the side, front, and rear walls of the truck body to form a closed cargo compartment. In the existing cargo truck roof assembly, the corrugated ribs of the corrugated sheets are perpendicular to the vehicle's direction of travel, and the side beams are square tubing. This roof assembly structure is not conducive to reducing wind resistance and fails to meet the stringent wind resistance requirements of current new energy vehicles. Summary of the Invention

[0004] This utility model provides a low-drag roof assembly for cargo compartments to solve the technical problem that existing roof assemblies are not conducive to reducing wind resistance and are difficult to meet the wind resistance coefficient requirements of new energy vehicles.

[0005] This utility model provides a low-drag top cover assembly for a cargo box, the low-drag top cover assembly for a cargo box comprising: The cover has several strip-shaped protrusions on its top that are parallel to the direction of vehicle travel; Side beams are installed around the perimeter of the cover, and the side beams on the front, left, and right sides of the cover have arc-shaped guide surfaces; An arched assembly, installed on the side beam and located below the cover, is used to arch the cover upwards to form an arc-shaped structure that is high in the middle and low around the edges.

[0006] In one embodiment of this utility model, the side beam is a hollow tubular beam.

[0007] In one embodiment of the present invention, the arch assembly includes a front reinforcing beam, a middle reinforcing beam, and a rear reinforcing beam arranged sequentially from front to back, and the cover is located above the front reinforcing beam, the middle reinforcing beam, and the rear reinforcing beam.

[0008] In one embodiment of the present invention, the front reinforcing beam, the middle reinforcing beam, and the rear reinforcing beam are all pre-arched beams, and the pre-arch height of the middle reinforcing beam is greater than the pre-arch height of the front reinforcing beam and the rear reinforcing beam.

[0009] In one embodiment of the present invention, a flexible pad layer is provided on the central reinforcing crossbeam for providing support to the top cover.

[0010] In one embodiment of this utility model, the flexible pad is an adhesive pad adhered to the central reinforcing crossbeam.

[0011] In one embodiment of this utility model, the cover is a rectangular cover formed by splicing multiple corrugated plates, and the strip protrusion is a corrugated rib on the corrugated plate.

[0012] In one embodiment of this utility model, the cover is welded and fixed to the side beams on the right and left sides.

[0013] In one embodiment of this utility model, the cover is riveted and fixed to the front and rear side beams.

[0014] This utility model also provides a cargo box, which includes a low wind resistance top cover of a cargo box as described above.

[0015] This utility model also provides a vehicle that includes a cargo box, the cargo box including a low wind resistance roof as described above.

[0016] The beneficial effects of this utility model are as follows: This utility model proposes a low-drag top cover assembly for a cargo box. By employing a side beam with an arc-shaped airflow guide surface on the top of the cargo box, the arc-shaped surface transitions from the outer wall of the cargo box to the top. During vehicle movement, the arc-shaped surface of the side beam on the top of the cargo box acts as a windward surface, smoothly guiding the airflow and reducing wind resistance at the top of the cargo box. Furthermore, strip-shaped protrusions along the vehicle's driving direction are used on the cover to guide the airflow at the top of the cargo box, further reducing wind resistance and making the wind resistance at the top of the cargo box even lower during vehicle movement. Additionally, an arched component provides arch support to the middle of the cover, improving the central support strength of the cover and giving the cover a certain curvature, resulting in a streamlined shape for the top of the cargo box. This further enhances the airflow guidance effect and reduces wind resistance during vehicle movement. Additionally, it can guide water accumulation on the top of the cargo box, preventing water from accumulating in the middle of the cargo box top cover. Compared with the existing cargo box top cover assembly structure, the technical solution of this utility model is more conducive to reducing the wind resistance of the cargo box top and meeting the requirements of new energy vehicles for the drag coefficient. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0018] In the attached diagram: Figure 1 This invention provides a low-wind-resistance cargo box top cover structure according to an embodiment of the present invention. Figure 2 The frame beam and arch assembly provided in one embodiment of this utility model; Figure 3 This is a side view of a frame beam provided in one embodiment of the present invention; Figure 4 This is a side view of the central reinforcing crossbeam provided in one embodiment of the present invention.

[0019] The attached figures are labeled as follows: Side beam 1, arc-shaped guide surface 101, front upper side beam 102, right side upper side beam 103, left side upper side beam 104, rear upper side beam 105, front reinforcing crossbeam 106, middle reinforcing crossbeam 107, rear reinforcing crossbeam 108, cover 2, strip protrusion 201, flexible padding layer 301. Detailed Implementation

[0020] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0021] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0022] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0023] Please see Figure 1 , Figure 1A low-drag top cover assembly for a cargo box, provided in one embodiment of the present invention, includes a side beam 1 installed on the top of the side wall of the cargo box. The side beam 1 at the top of the front wall, left side wall, and right side wall of the cargo box has an arc-shaped guide surface 101 that curves from the outer side wall of the cargo box to the top of the cargo box. A cover 2 is installed between the side beams 1 at the top of the side wall of the cargo box. The side of the cover 2 is connected to the side beam 1. The top of the cover 2 has several strip-shaped protrusions 201 parallel to the direction of vehicle travel. An arch assembly is installed on the side beam 1 and located below the cover 2, for arching the cover 2 upward to form an arc-shaped structure that is high in the middle and low around the edges.

[0024] In this embodiment, the side beam 1 serves two purposes: firstly, it acts as the edge structure of the cargo box top, using its arc-shaped airflow guide surface 101 to ensure a smooth transition between the outer wall and the top of the cargo box, reducing wind resistance at the edge of the cargo box top; secondly, the side beam 1 provides mounting support for the cover 2 on the top of the cargo box side wall, allowing the cover 2 to stably close the top of the cargo box, forming a closed cargo box together with the front wall, rear wall, and side wall. The cover 2 features strip-shaped protrusions 201 parallel to the vehicle's direction of travel, which guide the airflow over the top of the cargo box during vehicle movement, reducing wind resistance at the top of the cargo box.

[0025] For example, in this embodiment, the side beam 1 is a hollow tube beam formed by roll forming. The hollow tube beam helps to reduce the weight of the cargo box while maintaining good structural strength, which is more in line with the lightweight requirements of new energy vehicles. At the same time, the roll forming method is more conducive to forming the arc-shaped guide surface 101 of the side beam 1.

[0026] For example, refer to Figure 2 As shown, in this embodiment, the side beam 1 includes a front upper side beam 102, a right upper side beam 103, a left upper side beam 104, and a rear upper side beam 105. The front upper side beam 102, the right upper side beam 103, the left upper side beam 104, and the rear upper side beam 105 are connected to each other to form a frame beam. The arch assembly includes a front reinforcing crossbeam 106, a middle reinforcing crossbeam 107, and a rear reinforcing crossbeam 108 connected sequentially from front to back between the right upper side beam 103 and the left upper side beam 104. It should be noted that the two ends of the front reinforcing crossbeam 106 and the rear reinforcing crossbeam 108 are welded and fixed to the right upper side beam 103 and the left upper side beam 104, while the two ends of the middle reinforcing crossbeam 107 are riveted to the right upper side beam 103 and the left upper side beam 104. The cover 2 is located above the front reinforcing crossbeam 106, the middle reinforcing crossbeam 107, and the rear reinforcing crossbeam 108.

[0027] The front reinforcing beam 106, the middle reinforcing beam 107, and the rear reinforcing beam 108 reinforce the top structure of the cargo box along its length, ensuring the stability of the top structure and providing bottom support for the cover 2 in the middle area of ​​the frame beam.

[0028] For example, refer to Figure 3 , Figure 4 As shown, in this embodiment, the front reinforcing beam 106, the middle reinforcing beam 107, and the rear reinforcing beam 108 are all pre-arched beams. The pre-arch height of the middle reinforcing beam 107 is greater than that of the front reinforcing beam 106 and the rear reinforcing beam 108. It is worth noting that in this embodiment, the front reinforcing beam 106, the middle reinforcing beam 107, and the rear reinforcing beam 108 are pre-processed arched beams with a certain curvature. For example, the pre-arch height of the front reinforcing beam 106 and the rear reinforcing beam 108 is 20mm, and the pre-arch height of the middle reinforcing beam 107 is 40mm. This allows the cover 2 to undergo slight bending deformation after being supported, preventing excessive deformation from affecting installation stability while providing good drainage and flow control.

[0029] For example, in this embodiment, a flexible pad 301 is provided on the central reinforcing beam 107 to provide support for the cover 2. The flexible pad 301 can provide a buffer between the central reinforcing beam 107 and the cover 2, avoiding abnormal noises caused by collision and friction between the cover 2 and the central reinforcing beam 107 during vehicle operation.

[0030] For example, in this embodiment, the flexible pad 301 is an adhesive pad adhered to the central reinforcing crossbeam 107. The flexible pad 301, formed by adhering the adhesive pad, supports the cover 2 while preventing noise, offering convenient installation, low cost, and excellent performance.

[0031] It is worth noting that in this embodiment, the cover 2 is a rectangular cover formed by splicing multiple corrugated plates, and the strip protrusions 201 are the corrugated ribs on the corrugated plates. Corrugated plates are commonly used in freight car bodies, and using them to make the cover 2 is more conducive to cost control. For example, taking a 4.2-meter car body as an example, the cover 2 in the prior art is made by horizontally welding five corrugated plates with a forming height of 30mm. The welding of the five plates is carried out using an automatic arc welding machine, and the process requires manual pushing of the plates four times. The total length of the weld is 9152mm. The corrugated plates are welded horizontally to the four sides of the car body, the corrugated ribs are perpendicular to the direction of vehicle movement, and there are 36 corrugated ends. Using the method of this embodiment, the cover 2 can be vertically welded from 3 corrugated plates. Welding the 3 plates only requires two long longitudinal welds using roll welding, and only one plate pulling is required during the process. The total length of the weld is 8120mm. The weld length is reduced, and manual operation is reduced. The corrugated plates are fixed longitudinally to the four sides of the carriage, and the corrugated ribs are parallel to the direction of vehicle movement. There are only 18 corrugated heads, reducing the number of stamping times per vehicle. The material preparation efficiency and welding efficiency are significantly improved compared to the existing technology.

[0032] For example, in this embodiment, the cover 2 is welded and fixed to the right side upper beam 103 and the left side upper beam 104. The cover 2 is riveted and fixed to the front upper beam 102 and the rear upper beam 105. In this way, the cover 2 is welded to the right side upper beam 103 and the left side upper beam 104 to form an integral cover 2 assembly, which facilitates overall transportation. Then, it is riveted to the front upper beam 102 and the rear upper beam 105 on site, which is more conducive to the on-site assembly and use after the cargo box is transported in sections, thus improving transportation efficiency.

[0033] Another embodiment of the present invention provides a cargo box, which includes a side panel, a base and a top cover assembly, wherein the top cover assembly adopts the low wind resistance top cover assembly of the cargo box as described in any of the above embodiments.

[0034] Another embodiment of the present invention provides a vehicle including a cargo box, the cargo box including side panels, a base and a top cover assembly, the top cover assembly adopting the low wind resistance top cover assembly of the cargo box as described in any of the above embodiments.

[0035] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A low-drag top cover assembly for a cargo compartment, characterized in that, include: The cover has several strip-shaped protrusions on its top that are parallel to the direction of vehicle travel; Side beams are installed around the perimeter of the cover, and the side beams on the front, left and right sides of the cover have arc-shaped guide surfaces; An arched assembly, installed on the side beam and located below the cover, is used to arch the cover upwards to form an arc-shaped structure that is high in the middle and low around the edges.

2. The low wind resistance top cover assembly for a cargo compartment according to claim 1, characterized in that: The side beam is a hollow tubular beam.

3. The low wind resistance top cover assembly for a cargo compartment according to claim 1, characterized in that: The dome assembly includes a front reinforcing beam, a middle reinforcing beam, and a rear reinforcing beam arranged sequentially from front to back, with the cover located above the front reinforcing beam, the middle reinforcing beam, and the rear reinforcing beam.

4. The low wind resistance top cover assembly for a cargo compartment according to claim 3, characterized in that: The front reinforcing beam, the middle reinforcing beam, and the rear reinforcing beam are all pre-arched beams, with the pre-arch height of the middle reinforcing beam being greater than that of the front reinforcing beam and the rear reinforcing beam.

5. The low wind resistance top cover assembly for a cargo compartment according to claim 4, characterized in that: The central reinforcing beam is provided with a flexible padding layer to support the top cover.

6. The low wind resistance top cover assembly for a cargo compartment according to claim 1, characterized in that: The cover is a rectangular cover formed by splicing multiple corrugated plates, and the strip protrusions are the corrugated ribs on the corrugated plates.

7. A low-drag roof assembly for a cargo compartment according to claim 6, characterized in that: The cover is welded and fixed to the side beams on the right and left sides.

8. The low wind resistance top cover assembly for a cargo compartment according to claim 7, characterized in that: The cover is riveted and fixed to the front and rear side beams.

9. A cargo box, characterized in that, Including a low-drag roof assembly for a cargo compartment as described in any one of claims 1-8.

10. A vehicle, characterized in that, Includes a cargo compartment, the cargo compartment including a low-drag roof assembly of a cargo compartment as described in any one of claims 1-8.

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