U-shaped cargo box and off-highway dump truck

Abstract

The utility model discloses a U type goods box and off -highway dump truck, the battery group of off -highway dump truck sets up on the frame between the cab and goods box front board, and is located below the goods box brim, and the left and right sides of goods box bottom plate are arc structure, and the left and right sides of goods box front board are arc structure also, and are overlapped and are connected with goods box bottom plate, goods box bottom plate is equipped with bottom plate longitudinal reinforcing rib, and goods box front board is equipped with front board longitudinal reinforcing rib, and bottom plate longitudinal reinforcing rib is connected with front board longitudinal reinforcing rib, and goods box front board is equipped with front board cross reinforcing rib, and goods box side plate is equipped with side plate cross reinforcing rib, and front board cross reinforcing rib and side plate cross reinforcing rib rib are connected, and the goods box brim includes the brim soil retaining board and brim reinforcing plate, and the brim soil retaining board is horizontally arranged, and the distance between the brim soil retaining board and the battery group is not less than the battery group's battery replacement lifting height, and the upper end of brim reinforcing plate is connected with the brim soil retaining board. The utility model can help to overcome the goods box reliability shortage and the problem of being unable to adapt to the battery replacement.

Description

Technical Field

[0001] This utility model relates to the technical field of off-highway dump trucks. More specifically, this utility model relates to a U-shaped cargo box and an off-highway dump truck. Background Technology

[0002] Off-highway dump trucks are key equipment in the mining and construction of large-scale projects such as open-pit coal mines, metal and non-metal mines, cement and building materials transportation, and water conservancy and hydropower projects. Their core operating characteristics are high loading and unloading frequency, large load capacity, and long continuous operating time. The cargo box, as the core working device of this type of vehicle, directly undertakes loading, transporting, and unloading functions. Its structural rationality, strength, rigidity, and lightweight level play a decisive role in the overall transportation efficiency and operational reliability of the vehicle. Therefore, the cargo box design must meet strength and rigidity requirements while minimizing its own weight to improve transportation efficiency.

[0003] Currently, most mainstream cargo boxes on the market are rectangular structures with rear doors. Improving strength can only be achieved by increasing the thickness of the sheet metal or adding reinforcing ribs, which easily leads to excessive weight and reduced transport efficiency. While U-shaped cargo boxes exist, they are simply formed by bending the side panels without optimizing the overall structure, resulting in insufficient overall rigidity and strength. When loading large-diameter materials, existing cargo boxes are prone to deformation and damage due to structural strength deficiencies, significantly reducing reliability. Furthermore, they lack an adaptation structure designed for the battery swapping needs of battery-swapping dump trucks, failing to meet the operational performance and functional adaptation requirements of off-highway dump trucks.

[0004] Therefore, it is necessary to design a technical solution that can overcome the above-mentioned defects. Utility Model Content

[0005] One objective of this invention is to provide a U-shaped cargo box and an off-highway dump truck, overcoming the problems of insufficient cargo box reliability and inability to adapt to battery swapping.

[0006] To achieve these objectives and other advantages of this utility model, according to one aspect of the utility model, a U-shaped cargo box for an off-highway dump truck is provided, the U-shaped cargo box including a cargo box visor, a cargo box front panel, cargo box side panels, and a cargo box floor panel. The battery pack of the off-highway dump truck is mounted on the frame between the cab and the cargo box front panel, and is located below the cargo box visor. The left and right sides of the cargo box floor panel are arc-shaped structures, and the left and right sides of the cargo box front panel are also arc-shaped structures, overlapping and connecting with the cargo box floor panel. The cargo box floor panel is provided with longitudinal reinforcing ribs, and the cargo box front panel is provided with longitudinal reinforcing ribs. The cargo box has a reinforcing rib, wherein the longitudinal reinforcing rib of the bottom plate is connected to the longitudinal reinforcing rib of the front plate, the front plate of the cargo box has a front plate transverse reinforcing rib, and the side plate of the cargo box has a side plate transverse reinforcing rib, wherein the front plate transverse reinforcing rib and the side plate transverse reinforcing rib are connected to each other; the cargo box brim includes a brim retaining plate and a brim reinforcing plate, the brim retaining plate is arranged horizontally, the distance between the brim retaining plate and the battery pack is not less than the battery pack's battery swapping lifting height, the upper end of the brim reinforcing plate is connected to the brim retaining plate, and the lower end of the brim reinforcing plate is connected to the upper end of both the front plate and the side plate of the cargo box.

[0007] Furthermore, the cargo box floor is formed by connecting a first floor panel and a second floor panel, wherein the first floor panel is flat and the second floor panel is upturned.

[0008] Furthermore, the planar area of ​​the cargo box floor is provided with longitudinal beams and secondary longitudinal beams, the longitudinal beams are provided with lifting cylinder connecting seats and tilting hinge seats, the planar area of ​​the cargo box floor is also provided with inner reinforcing ribs, and the arc-shaped area of ​​the cargo box floor is provided with edge reinforcing ribs.

[0009] Furthermore, the longitudinal beam and the secondary longitudinal beam are U-shaped channel steel with slots, and the inner reinforcing ribs of the bottom plate pass through the slots and connect with the longitudinal beam and the secondary longitudinal beam to form a skeleton structure; the edge reinforcing ribs of the bottom plate are arc-shaped channel steel and are lapped and welded with the inner reinforcing ribs of the bottom plate.

[0010] Furthermore, the front panel of the cargo box includes a front panel main plate, front panel longitudinal reinforcing ribs, front panel upper transverse ribs, front panel middle transverse ribs, and front panel upper reinforcing plate; the left and right sides of the front panel main plate are arc-shaped, the upper and middle parts of the front panel longitudinal reinforcing ribs are provided with slots, the front panel upper transverse ribs and the front panel middle transverse ribs pass through the slots and are welded to the front panel main plate; the front panel upper reinforcing plate is disposed on the top of the front panel main plate, so that the top of the cargo box front panel forms a plane.

[0011] Furthermore, the side panel of the cargo box includes a large side panel, upper horizontal ribs, middle horizontal ribs, an upper edge banding, a rear vertical rib, and a rear edge banding. The upper horizontal ribs are arranged on the upper part of the large side panel, the upper edge banding connects the large side panel and the upper horizontal ribs, the rear vertical rib is located at the rear of the large side panel, the rear edge banding is welded to the rear of the rear vertical rib, and the middle horizontal rib is located in the middle of the large side panel.

[0012] Furthermore, the brim of the cargo box also includes longitudinal reinforcing ribs, top reinforcing ribs, and a front brim baffle; the left and right sides of the brim reinforcing plate include arc-shaped structures and straight structures, the arc-shaped structures are matched and connected to the arc-shaped structures on both sides of the front panel of the cargo box, and the straight structures are connected to the connection position of the front panel and the side panel of the cargo box. The longitudinal reinforcing ribs are provided on the brim reinforcing plate, the top reinforcing ribs are provided on the brim retaining plate, and the front brim baffle is connected to the brim retaining plate and connected to the top reinforcing ribs.

[0013] According to another aspect of the present invention, an off-highway dump truck is also provided, the off-highway dump truck including the aforementioned U-shaped cargo box.

[0014] This utility model has at least the following beneficial effects: In this utility model, the arc-shaped structure of the cargo box bottom plate and front plate reduces material resistance, and the longitudinal and transverse reinforcing ribs are connected to form a skeleton-type reinforcement system, which improves the overall rigidity and strength while controlling the weight. The heightened brim adapts to the battery swapping requirements, solving the problems of insufficient reliability and inability to adapt to battery swapping of existing cargo boxes, and can better cope with the loading of large-diameter materials and battery swapping operation scenarios.

[0015] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the U-shaped cargo box of this utility model; Figure 2 This is a side view of the bottom plate of the U-shaped cargo box of this utility model; Figure 3 This is a front view of the U-shaped cargo box bottom plate of this utility model; Figure 4 This is a perspective view of the bottom plate of the U-shaped cargo box of this utility model; Figure 5 This is a side view of the U-shaped cargo box side panel of this utility model; Figure 6 This is a perspective view of the side panel of the U-shaped cargo box of this utility model; Figure 7This is a schematic diagram of the structure of the front panel of the U-shaped cargo box of this utility model; Figure 8 This is a schematic diagram of the U-shaped cargo box brim of this utility model. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings, so that those skilled in the art can implement it based on the description.

[0018] It should be understood that terms such as "having," "comprising," and "including" used in the embodiments of this application do not exclude the presence or addition of one or more other elements or combinations thereof. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of components in a specific posture. If the specific posture changes, the directional indication will change accordingly. When an element is referred to as "fixed to" or "set on" another element, it can be directly on the other element or may have an intervening element present. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element through an intervening element. Descriptions involving "first," "second," etc., in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features.

[0019] It should be noted that the technical solutions of the various embodiments of this application can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this application.

[0020] like Figure 1-8As shown, an embodiment of this application provides a U-shaped cargo box for off-highway dump trucks. The U-shaped cargo box includes a cargo box visor 1, a cargo box front panel 2, a cargo box side panel 3, and a cargo box bottom panel 4. The battery pack of the off-highway dump truck is mounted on the frame between the cab and the cargo box front panel, and is located below the cargo box visor. The left and right sides of the cargo box bottom panel 4 are arc-shaped structures, and the left and right sides of the cargo box front panel 2 are also arc-shaped structures, overlapping and connecting with the cargo box bottom panel 4. The cargo box bottom panel 4 is provided with a bottom plate longitudinal reinforcing rib, and the cargo box front panel 2 is provided with a front plate longitudinal reinforcing rib 2.2. The bottom plate longitudinal reinforcing rib and the front plate longitudinal reinforcing rib are connected. The longitudinal reinforcing ribs 2.2 are continuously connected. The front panel of the cargo box is provided with front panel transverse reinforcing ribs, and the side panel of the cargo box 3 is provided with side panel transverse reinforcing ribs. The front panel transverse reinforcing ribs and the side panel transverse reinforcing ribs are continuously connected. The cargo box brim 1 includes a brim retaining plate 1.3 and a brim reinforcing plate 1.5. The brim retaining plate 1.3 is arranged horizontally. The distance between the brim retaining plate 1.3 and the battery pack is not less than the battery pack's battery swapping lifting height. The upper end of the brim reinforcing plate 1.5 is connected to the brim retaining plate 1.3, and the lower end of the brim reinforcing plate 1.5 is connected to the upper ends of both the front panel 2 and the side panel 3 of the cargo box.

[0021] For example, the U-shaped cargo box comprises a cargo box visor 1, a cargo box front panel 2, cargo box side panels 3, and a cargo box bottom panel 4. The cargo box visor 1 is an independent structure located at the top of the cargo box. The cargo box front panel 2 is a panel at the front of the cargo box used to block materials. The cargo box side panels 3 are panels located on the left and right sides of the cargo box, respectively. The cargo box bottom panel 4 is a bottom panel that supports materials and has reserved space for battery installation. The left and right sides of the cargo box bottom panel 4 are curved structures. This curved structure means that the left and right edges of the bottom panel are smooth curves, rather than right angles or broken lines, which reduces resistance when loading materials. The left and right sides of the cargo box front panel 2 are also curved structures, and their curvature matches the curvature of the cargo box bottom panel 4. The two are fixed by overlapping connection; that is, the left and right curved edges of the front panel and the left and right curved edges of the bottom panel are fitted together and then welded to form a tight connection, ensuring structural continuity. The cargo box floor plate 4 is provided with longitudinal stiffeners arranged along the length of the cargo box. These stiffeners are used to improve the load-bearing strength of the floor plate along the length direction. The cargo box front plate 2 is provided with longitudinal stiffeners 2.2 arranged along the height direction of the cargo box. The longitudinal stiffeners of the floor plate and the longitudinal stiffeners of the front plate 2.2 are connected through, that is, their ends are butt-welded to each other to form a continuous longitudinal stiffening structure. The cargo box front plate 2 is provided with transverse stiffeners arranged along the width direction of the cargo box. These stiffeners include the upper transverse stiffener 2.1 and the middle transverse stiffener 2.4. The cargo box side plate 3 is provided with transverse stiffeners arranged along the height direction of the cargo box. These stiffeners include the upper transverse stiffener 3.2 and the middle transverse stiffener 3.3. The transverse stiffeners of the front plate and the transverse stiffeners of the side plate are connected through, that is, the ends of the upper transverse stiffener 2.1 and the middle transverse stiffener 2.4 are butt-welded to the ends of the upper transverse stiffener 3.2 and the middle transverse stiffener 3.3 of the side plate, respectively, to form a continuous transverse stiffening structure, ensuring that the overall rigidity of the cargo box is sufficient to cope with heavy loads. The U-shaped cargo box design is also compatible with the power battery packs of off-highway dump trucks. Generally, 2-4 battery packs are symmetrically arranged along the width of the chassis, and each battery pack is fixed to a dedicated battery mounting bracket on the chassis with high-strength bolts. Specifically, the distance between the brim baffle and the top of the battery pack is strictly controlled to be no less than the battery pack's battery swapping lifting height (i.e., the height at which the battery pack needs to be lifted upwards to detach from the mounting bracket when swapping, usually 100-200mm). This design ensures that the battery pack can be smoothly lifted upwards to detach from the bracket during battery swapping without colliding or interfering with the brim baffle. The upper end of the brim reinforcement plate is vertically connected to the horizontally arranged brim baffle, and the lower end is fixed to the upper end of the front and side panels of the cargo box, forming a stable frame structure that provides top protection for the battery pack below and ensures the safety of battery swapping operations with sufficient vertical space.

[0022] In existing technologies, the cargo boxes of off-highway dump trucks are mostly rectangular structures with rear doors. Improving strength requires increasing the thickness of the sheet metal or adding independent reinforcing ribs, leading to increased weight. A few U-shaped cargo boxes are simply formed by bending the side panels, with scattered and non-continuous reinforcing ribs, resulting in insufficient overall rigidity and strength, and lacking a structure suitable for battery swapping. In this embodiment, the arc-shaped structure of the cargo box bottom plate 4 and front plate 2 reduces material resistance, and the longitudinal and transverse reinforcing ribs form a skeleton-type reinforcement system, improving overall rigidity and strength while controlling weight, solving the problem of insufficient reliability in existing cargo boxes, and better handling the loading of large-diameter materials. In this embodiment, the U-shaped cargo box, through the design that "the distance between the brim retaining plate and the battery pack is not less than the battery swapping lifting height," also specifically solves the spatial interference problem during battery swapping of off-highway dump trucks, adapting to battery swapping operation scenarios.

[0023] In another embodiment, the cargo box floor 4 is formed by connecting floor plate 1 4.1 and floor plate 2 4.2, with floor plate 1 4.1 being flat and floor plate 2 4.2 being upturned.

[0024] For example, the body constituting the cargo box floor 4 is divided into two parts: Cargo Box Floor Large Plate 1 4.1 and Cargo Box Floor Large Plate 2 4.3. The lower part of the cargo box floor 4 corresponds to the battery mounting area of ​​the vehicle frame. A protective liner is welded to the lower surface of Large Plate 1 4.1. The protective liner is made of wear-resistant steel plate and is used to prevent damage to the top of the battery pack due to accidental contact or impact from falling materials. Among them, Cargo Box Floor Large Plate 1 4.1 is the main load-bearing area of ​​the floor, with an area larger than Cargo Box Floor Large Plate 2 4.3. Its lower part completely covers the battery pack mounting area on the vehicle frame. Cargo Box Floor Large Plate 2 4.3 is a plate connected to the rear of Cargo Box Floor Large Plate 1 4.1. The two are fixedly connected by welding. The welded parts must be flat and seamless to ensure the overall load-bearing stability of the floor and to avoid interference between the welded protrusions and the vehicle frame or battery pack. The first large bottom plate 4.1 is flat. This flat structure can provide a stable support surface for materials, preventing them from tilting and swaying during loading and transportation. The lower surface of the flat plate is easy to weld with the protective liner. The second large bottom plate 4.3 is tilted upward relative to the flat surface of the first large bottom plate 4.1. The tilting angle is determined according to the overall size of the cargo box and the characteristics of commonly used materials. It is necessary to ensure that the rear material will not spill from the rear end of the bottom plate due to bumps when the vehicle is moving, and at the same time, it will not affect the cargo box's tilting and unloading action around the tilting hinge seat 4.9.

[0025] In existing technologies, the cargo box floor of off-highway dump trucks is mostly a one-piece flat structure with no protective design on the lower surface and no raised structure at the rear of the floor, resulting in a high risk of material spillage during transportation. In this embodiment, the cargo box floor 4 adopts a segmented structure with a flat large plate 4.1 and an upward-curving large plate 4.3, which can reduce material loss during transportation compared to existing technologies.

[0026] In another embodiment, the planar area of ​​the cargo box bottom plate 4 is provided with longitudinal beams and secondary longitudinal beams, and the longitudinal beams are provided with lifting cylinder connecting seats and tilting hinge seats. The planar area of ​​the cargo box bottom plate 4 is also provided with bottom plate inner reinforcing ribs, and the arc-shaped area of ​​the cargo box bottom plate 4 is provided with bottom plate edge reinforcing ribs.

[0027] For example, the planar area of ​​the cargo box floor 4, i.e. the planar portion where the main cargo box floor plate 4.1 is located, has a cargo box floor longitudinal beam 4.6 and a cargo box floor secondary longitudinal beam 4.5 arranged parallel to each other along the length of the cargo box. The cargo box floor longitudinal beam 4.6 is the main load-bearing component, with a cross-sectional dimension larger than that of the cargo box floor secondary longitudinal beam 4.5. Both beams jointly bear the weight of the cargo box and its materials. A lifting cylinder connecting seat 4.7 and a cargo box floor tilting hinge seat 4.9 are fixedly installed on the longitudinal beam. The lifting cylinder connecting seat 4.7 is a steel plate assembly with connecting holes, used to connect with the piston rod end of the vehicle lifting cylinder. The cargo box floor tilting hinge seat 4.9 is an assembly with hinge holes, used to cooperate with the hinge seat on the vehicle frame to form a rotation fulcrum for tilting the cargo box. Its installation height is calibrated to ensure that the cargo box will not collide with the battery pack below when tilting. The flat area of ​​the cargo box floor 4 is also provided with an inner reinforcing rib 4.8. The reinforcing rib is arranged along the width direction of the cargo box and its end is welded to the longitudinal beam and the sub-longitudinal beam to further distribute the load in the flat area. The arc-shaped area of ​​the cargo box floor 4, namely the arc-shaped part on the left and right sides of the floor, is provided with a cargo box floor edge reinforcing rib 4.2. The reinforcing rib is arranged along the arc curve direction and its end is welded to the side plate horizontal reinforcing ribs 3.2 and 3.3 on the side plate of the cargo box side plate 3 to ensure that the force between the arc-shaped area and the side plate can be effectively transmitted. At the same time, the distance between the edge of the arc-shaped area and the battery pack on the side of the frame is not less than 200mm to avoid interference between the cargo box side plate 3 and the battery swapping equipment during battery swapping.

[0028] In existing technologies, the longitudinal beams and reinforcing ribs of the cargo box floor are mostly surface-welded, resulting in weak connections that are prone to deformation. Furthermore, no battery cable channels are provided, the safety distance between the curved area of ​​the floor and the battery pack or battery swapping equipment is insufficient, and the lifting and tilting components are poorly arranged, making it impossible to adjust the cargo box to a suitable position during battery swapping. In this embodiment, a cable protection channel is provided between the longitudinal beams and sub-longitudinal beams. The lifting cylinder connecting seat 4.7 and the tilting hinge seat 4.9 work together to achieve fine-tuning of the cargo box. A safety distance is provided in the curved area. Compared to existing technologies, this can disperse local stress, protect battery cables, provide space for the operation of battery swapping equipment, and improve the reliability and convenience of the cargo box during battery swapping.

[0029] In another embodiment, the longitudinal beam 4.6 and the secondary longitudinal beam 4.5 are U-shaped channel steels with slots. The inner reinforcing rib 4.8 of the bottom plate passes through the slots and connects with the longitudinal beam 4.6 and the secondary longitudinal beam 4.5 to form a skeleton structure. The edge reinforcing rib 4.2 of the bottom plate is an arc-shaped channel steel and is lapped and welded with the inner reinforcing rib 4.8 of the bottom plate.

[0030] For example, both the longitudinal beam 4.6 and the secondary longitudinal beam 4.5 of the cargo box floor are made of U-shaped channel steel. The U-shaped channel steel has a "U"-shaped cross-section, which has good bending resistance and can provide stable support for the floor. On the side walls of the longitudinal beam and the secondary longitudinal beam, slots are provided that match the cross-sectional dimensions of the inner reinforcing rib 4.8 of the cargo box floor. The slot positions correspond to the arrangement positions of the inner reinforcing ribs to ensure that the inner reinforcing ribs can be smoothly inserted. The inner reinforcing rib 4.8 of the floor is a long strip of steel plate. Its end passes through the internal cavity of the longitudinal beam and the secondary longitudinal beam from the slot, and is then fixed to the inner wall of the longitudinal beam and the secondary longitudinal beam by welding. This allows the longitudinal beam, the secondary longitudinal beam and the inner reinforcing rib to intertwine and form an overall structure similar to a skeleton, i.e., a skeleton-type structure. This structure can significantly improve the overall rigidity of the floor, avoid local deformation, and ensure that the safe clearance between the lower surface of the cargo box floor 4 and the battery pack is always maintained. The bottom plate edge reinforcing rib 4.2 is an arc-shaped channel steel with a "U"-shaped cross-section that extends along the curve of the bottom plate's arc area, matching the arc of the bottom plate. The ends of the bottom plate edge reinforcing rib 4.2 and the inner reinforcing rib 4.8 of the bottom plate fit together and are fixed by lap welding to ensure continuous force transmission between them. The outer edge of the arc-shaped channel steel is ground to prevent the moving parts of the power swapping equipment from being scratched during power swapping. Furthermore, the bottom plate also includes a rear edge reinforcing rib 4.4 and a rear inner reinforcing rib 4.10, significantly improving the rear rigidity of the bottom plate and preventing deformation.

[0031] In existing technologies, the longitudinal beams of the cargo box floor are mostly made of solid steel or ordinary channel steel, with reinforcing ribs only welded to the outer surface of the longitudinal beams, resulting in low connection strength. The edge reinforcing ribs are mostly straight structures, which are poorly adapted to curved areas. In this embodiment, the longitudinal beams and sub-longitudinal beams use U-shaped channel steel with slots, the openings facing outwards to prevent material accumulation. Inner reinforcing ribs are inserted to form a skeleton structure, and the edge reinforcing ribs use curved channel steel with polished edges. Compared to existing technologies, the reinforced structure is more stable, and the curved edge reinforcing ribs have better adaptability.

[0032] In another embodiment, the front panel 2 of the cargo box includes a front panel large plate 2.3, a front panel longitudinal reinforcing rib 2.2, a front panel upper transverse rib 2.1, a front panel middle transverse rib 2.4, and a front panel upper reinforcing plate 2.5; the left and right sides of the front panel large plate 2.3 are arc-shaped, and the upper and middle parts of the front panel longitudinal reinforcing rib 2.2 are provided with slots, and the front panel upper transverse rib 2.1 and the front panel middle transverse rib 2.4 pass through the slots and are welded to the front panel large plate 2.3; the front panel upper reinforcing plate 2.5 is disposed on the top of the front panel large plate 2.3, so that the top of the cargo box front panel 2 forms a plane.

[0033] For example, the front panel 2 of the cargo box includes a large front panel 2.3, longitudinal reinforcing ribs 2.2, upper transverse ribs 2.1, middle transverse ribs 2.4, and upper reinforcing plates 2.5. The large front panel 2.3 is the main body of the front panel, and its thickness is determined according to the load-bearing requirements, used to block materials at the front. The longitudinal reinforcing ribs 2.2 are arranged on the surface of the large panel along the height direction of the cargo box, and their number is determined according to the width of the front panel. The upper transverse ribs 2.1 and the middle transverse ribs 2.4 are arranged along the width direction of the cargo box, located at the upper part and the middle part of the front panel, respectively. The left and right sides of the large front panel 2.3 are arc-shaped, and the radius of curvature is consistent with the radius of curvature of the left and right arcs of the bottom panel 4, ensuring a tight fit when overlapping with the bottom panel. The upper and middle parts of the longitudinal stiffener 2.2 of the front plate are provided with slots. The slot size matches the cross-sectional size of the upper transverse stiffener 2.1 and the middle transverse stiffener 2.4. After the ends of the upper transverse stiffener 2.1 and the middle transverse stiffener 2.4 pass through the slots, they are welded and fixed to the surface of the front plate 2.3, so that the longitudinal and transverse stiffeners interweave and improve the overall rigidity of the front plate. The upper stiffener 2.5 of the front plate is a flat steel plate, which is welded and fixed to the top edge of the front plate 2.3. Its surface is kept flat, so that the top of the front plate 2 of the cargo box forms a flat surface, which is convenient for connection with the cargo box visor 1.

[0034] In existing technologies, the front panel of the cargo box is mostly a rectangular flat plate with independent longitudinal and transverse reinforcing ribs that are only welded to the surface. There is no dedicated reinforcing plate at the top, resulting in insufficient rigidity of the front panel and poor fit with the curved part of the bottom plate. In this embodiment, the front panel has an arc-shaped fitting bottom plate at about 2.3mm in diameter. The longitudinal reinforcing ribs are slotted to allow the transverse ribs to pass through and be welded. A top reinforcing plate is provided to form a flat surface. Compared with existing technologies, this improves the overall rigidity of the front panel, avoids the problem of insufficient reinforcement caused by independent reinforcing ribs, and the top flat surface facilitates connection with the brim, solving the problems of insufficient fit and rigidity of existing front panels.

[0035] In another embodiment, the side panel 3 of the cargo box includes a large side panel 3.1, a horizontal rib 3.2 on the upper side panel, a middle horizontal rib 3.3 on the side panel, an upper edge banding 3.4 on the upper side panel, a rear vertical rib 3.5 on the side panel, and a rear edge banding 3.6 on the side panel. The horizontal rib 3.2 on the upper side panel is arranged on the upper part of the large side panel 3.1. The upper edge banding 3.4 on the upper side panel connects the large side panel 3.1 and the horizontal rib 3.2 on the upper side panel. The rear vertical rib 3.5 on the side panel is located at the rear of the large side panel 3.1. The rear edge banding 3.6 on the side panel is welded to the rear of the rear vertical rib 3.5 on the side panel. The middle horizontal rib 3.3 on the side panel is located in the middle of the large side panel 3.1.

[0036] For example, the cargo box side panel 3 includes a large cargo box side panel 3.1, upper horizontal ribs 3.2, middle horizontal ribs 3.3, upper edge banding 3.4, rear vertical ribs 3.5, and rear edge banding 3.6. The large cargo box side panel 3.1 is a flat steel plate and is the main body of the side panel, used to block side materials. The upper horizontal ribs 3.2 and middle horizontal ribs 3.3 are arranged along the width direction of the cargo box, located at the upper and middle parts of the side panel respectively, and are arranged in parallel. The rear vertical ribs 3.5 are arranged along the height direction of the cargo box at the rear of the side panel. The upper edge banding 3.4 and rear edge banding 3.6 are bent steel plates used to strengthen the connection parts. The horizontal rib 3.2 on the side plate is located on the upper part of the main side plate 3.1, near the top edge. One side of the side plate upper edge banding 3.4 is welded to the upper part of the main side plate 3.1, and the other side is welded to the top of the horizontal rib 3.2, enhancing the connection strength. The rear vertical rib 3.5 of the side plate is located at the rear of the main side plate 3.1, near the rear edge. The rear edge banding 3.6 is welded to the rear of the rear vertical rib 3.5, protecting the rear vertical rib and the rear edge of the side plate. The middle horizontal rib 3.3 of the side plate is located in the middle of the main side plate 3.1, directly below the upper horizontal rib 3.2, further improving the rigidity of the middle part of the side plate.

[0037] In existing technologies, the reinforcing ribs of cargo box side panels are mostly arranged in a single direction, and the reinforcing ribs are simply welded to the side panel without any edge protection structure. The rear of the side panel lacks protection and is prone to edge deformation. In this embodiment, the side panel is reinforced in multiple directions by upper horizontal ribs, middle horizontal ribs, and rear vertical ribs. An upper edge protection plate connects the side panel to the upper horizontal ribs, and a rear edge protection plate protects the rear vertical ribs. Compared to existing technologies, this improves the strength of the side panel from multiple locations, prevents edge deformation, enhances the impact resistance of the side panel when loading materials, and improves the overall reliability of the cargo box.

[0038] In another embodiment, the brim 1 of the cargo box further includes a longitudinal reinforcing rib 1.4, a top reinforcing rib 1.2, and a front brim baffle 1.1; the left and right sides of the brim reinforcing plate 1.5 include an arc-shaped structure and a straight structure, the arc-shaped structure is matched and connected to the arc-shaped structures on both sides of the front panel of the cargo box, and the straight structure is connected to the connection position of the front panel of the cargo box and the side panel of the cargo box. The longitudinal reinforcing rib 1.4 is disposed on the brim reinforcing plate 1.5, the top reinforcing rib 1.2 is disposed on the brim retaining plate 1.3, and the front brim baffle 1.1 is connected to the brim retaining plate 1.3 and is connected to the top reinforcing rib 1.2.

[0039] For example, the cargo box brim 1 includes a cargo box brim reinforcing plate 1.5, a cargo box brim longitudinal reinforcing rib 1.4, a cargo box brim retaining plate 1.3, a cargo box brim top reinforcing rib 1.2, and a cargo box brim front baffle 1.1. The cargo box brim reinforcing plate 1.5 is the base plate of the brim and is used to support other components of the brim. The cargo box brim longitudinal reinforcing rib 1.4 is arranged along the length of the cargo box to improve the longitudinal stiffness of the brim. The cargo box brim retaining plate 1.3 is located at the top of the brim to prevent material from splashing. The cargo box brim top reinforcing rib 1.2 is arranged along the width of the cargo box to improve the stiffness of the retaining plate. The cargo box brim front baffle 1.1 is located at the front end of the brim to prevent material from splashing. The brim reinforcement plate 1.5 serves as the vertical load-bearing structure. Its left and right sides employ a composite design of arc-shaped and straight-line structures. The radius of curvature of the arc-shaped structure perfectly matches the arc-shaped edges on both sides of the front panel 2 of the cargo box. The two are tightly connected by welding or bolts, ensuring a continuous arc transition between the brim 1 and the front panel 2 of the cargo box, preventing material jamming. The straight-line structure extends to the connection point between the front panel 2 and the side panel 3 of the cargo box, and is fixed to the reinforcement structure at this location by welding, strengthening the overall connection strength between the brim and the cargo box body. The longitudinal reinforcement ribs 1.4 of the brim are welded to the upper surface of the brim reinforcement plate 1.5, with the number determined by the brim length. The brim retaining plate 1.3 is welded to the top of the brim reinforcement plate 1.5, covering the longitudinal reinforcement ribs. The top reinforcement rib 1.2 of the brim is welded to the upper surface of the brim retaining plate 1.3, perpendicular to the longitudinal reinforcement ribs. The front brim baffle 1.1 is vertically welded to the front end of the brim retaining plate 1.3, and simultaneously welded to the front end of the top reinforcement rib 1.2 of the brim, forming a closed front end structure.

[0040] In existing technologies, off-highway dump truck cargo boxes often lack dedicated visors, or the visors are simple flat panels without reinforcement, making them unsuitable for battery swapping and prone to damage. In this embodiment, the cargo box visor 1 forms a reinforcement system through reinforcing plates and longitudinal and transverse reinforcing ribs, with left and right arc shapes adapted to the cargo box body. The front baffle and retaining plate block materials. Compared with existing technologies, this can protect the upper part of the cargo box and prevent materials from splashing. At the same time, the heightened visor design is suitable for battery swapping operations, solving the problem of existing cargo boxes lacking visors or having insufficient visor functionality.

[0041] Embodiments of this application also provide off-highway dump trucks, which include the U-shaped cargo box described in the above embodiments.

[0042] For example, off-highway dump trucks are dump vehicles used in large-scale projects such as open-pit coal mines, metal and non-metal mines, cement and building material transportation, and water conservancy and hydropower projects. They are characterized by high loading and unloading frequency, large load capacity, and long continuous operation time. The vehicle mainly includes components such as a frame, power system, lifting system, battery system, and cargo box. The battery system consists of a battery pack, a battery management system, a charging interface, and a battery swapping interface. The battery management system is installed in the control box at the rear of the frame, and the battery swapping interfaces are located on both sides of the rear of the frame for easy connection of battery swapping equipment. The cargo box of this off-highway dump truck adopts the aforementioned U-shaped cargo box, that is, the cargo box bottom plate 4 of the U-shaped cargo box is hinged to the hinge on the vehicle frame through the cargo box bottom plate flip hinge seat 4.9, and the lifting cylinder connecting seat 4.7 on the cargo box bottom plate 4 is connected to the lifting cylinder of the vehicle lifting system. During battery swapping, the robotic arm of the swapping equipment extends from the side of the vehicle frame into the area where the battery pack is located. First, the fixing bolts between the battery pack and the mounting bracket are removed. Then, the battery pack is lifted upwards (to a preset swapping height). Because the distance between the brim and the battery pack is not less than this lifting height, the battery pack can smoothly detach from the bracket without contacting the brim, allowing for a safe swapping operation without lifting the cargo box. After the old battery pack is removed, the new battery pack is lowered to the mounting bracket and secured by the robotic arm in the reverse process. The entire process is safe and efficient due to the brim's spatial design, completely avoiding potential safety hazards from lifting the cargo box. After the battery pack is secured, the cable connectors are connected and the battery status is checked. After the swapping is completed, the brim 1 is reinstalled on the upper part of the cargo box front panel 2 and cargo box side panel 3. The cargo box is then reset to a horizontal position using a lifting cylinder, completing the entire swapping process. The cargo box's bottom plate, front plate, and side panels form an integrated reinforcement system through an arc-shaped structure and longitudinal and transverse reinforcing ribs, ensuring the cargo box can withstand the load and impact of large-diameter materials.

[0043] The number of devices and processing capacity described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of the U-shaped cargo box of this utility model will be readily apparent to those skilled in the art.

[0044] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A U-shaped cargo box for off-highway dump trucks, the U-shaped cargo box comprising a cargo box visor, a front cargo box panel, side cargo box panels, and a cargo box floor panel, wherein the battery pack of the off-highway dump truck is mounted on the frame between the cab and the front cargo box panel, and located below the cargo box visor, characterized in that, The left and right sides of the cargo box floor are arc-shaped, and the left and right sides of the cargo box front panel are also arc-shaped, and they overlap and connect with the cargo box floor. The bottom plate of the cargo box is provided with a bottom plate longitudinal stiffener, the front plate of the cargo box is provided with a front plate longitudinal stiffener, the bottom plate longitudinal stiffener and the front plate longitudinal stiffener are connected through, the front plate of the cargo box is provided with a front plate transverse stiffener, the side plate of the cargo box is provided with a side plate transverse stiffener, the front plate transverse stiffener and the side plate transverse stiffener are connected through. The cargo box brim includes a brim retaining plate and a brim reinforcing plate. The brim retaining plate is arranged horizontally, and the distance between the brim retaining plate and the battery pack is not less than the battery pack's battery swapping lifting height. The upper end of the brim reinforcing plate is connected to the brim retaining plate, and the lower end of the brim reinforcing plate is connected to the upper end of both the front panel and the side panel of the cargo box.

2. The U-shaped cargo box as described in claim 1, characterized in that, The cargo box floor is formed by connecting two large floor panels, one of which is flat and the other is upturned.

3. The U-shaped cargo box as described in claim 1, characterized in that, The flat area of ​​the cargo box floor is provided with longitudinal beams and secondary longitudinal beams. The longitudinal beams are provided with lifting cylinder connecting seats and tilting hinge seats. The flat area of ​​the cargo box floor is also provided with inner reinforcing ribs, and the arc-shaped area of ​​the cargo box floor is provided with edge reinforcing ribs.

4. The U-shaped cargo box as described in claim 3, characterized in that, The longitudinal beam and the secondary longitudinal beam are U-shaped channel steel with slots. The reinforcing ribs inside the bottom plate pass through the slots and connect with the longitudinal beam and the secondary longitudinal beam to form a skeleton structure. The edge reinforcing ribs of the base plate are arc-shaped channel steels, which are overlapped and welded to the inner reinforcing ribs of the base plate.

5. The U-shaped cargo box as described in claim 1, characterized in that, The front panel of the cargo box includes a front panel large plate, front panel longitudinal reinforcing ribs, front panel upper transverse ribs, front panel middle transverse ribs, and front panel upper reinforcing plate; The left and right sides of the front plate are arc-shaped, and the upper and middle parts of the longitudinal stiffeners of the front plate are provided with slots. The upper horizontal stiffeners and the middle horizontal stiffeners of the front plate pass through the slots and are welded to the front plate. The reinforcing plate on the front panel is disposed on the top of the front panel, so that the top of the front panel of the cargo box forms a flat surface.

6. The U-shaped cargo box as described in claim 1, characterized in that, The cargo box side panel includes a side panel main panel, a side panel upper horizontal rib, a side panel middle horizontal rib, a side panel upper edge banding, a side panel rear vertical rib, and a side panel rear edge banding. The horizontal ribs on the side plate are arranged on the upper part of the side plate, the side plate edge banding plate connects the side plate and the horizontal ribs on the side plate, the rear vertical ribs on the side plate are located at the rear of the side plate, the rear edge banding plate is welded to the rear of the rear vertical ribs on the side plate, and the middle horizontal ribs on the side plate are located in the middle of the side plate.

7. The U-shaped cargo box as described in claim 1, characterized in that, The cargo box brim also includes longitudinal reinforcing ribs, top reinforcing ribs, and front brim brim plate; The left and right sides of the brim reinforcement plate include an arc-shaped structure and a straight structure. The arc-shaped structure matches and connects with the arc-shaped structures on both sides of the front panel of the cargo box. The straight structure connects with the connection position of the front panel of the cargo box and the side panel of the cargo box. The longitudinal reinforcement of the brim is provided on the brim reinforcement plate. The top reinforcement of the brim is provided on the brim retaining plate. The front brim brim baffle is connected to the brim retaining plate and is connected to the top reinforcement of the brim.

8. An off-highway dump truck, characterized in that, The off-highway dump truck includes a U-shaped cargo box as described in any one of claims 1-7.

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