Frame assembly for flat car and flat car

Abstract

The invention provides a frame assembly for a flat car and the flat car, and the frame assembly comprises two longitudinal beams which are oppositely arranged along the width direction of the car; the multiple cross beams are arranged in the length direction of the longitudinal beams at intervals, and the two ends of each cross beam are connected with the longitudinal beams on the two sides correspondingly; the connecting assemblies are located on the outer sides of the longitudinal beams and connected with the longitudinal beams, and part of the connecting assemblies protrude out of the top faces of the longitudinal beams; wherein a loading space is formed between the protruding part of the connecting assembly and the longitudinal beam, and the loading space is used for installing a flat plate upper installation bottom plate assembly. The flat car solves the technical problem that in the prior art, the transportation safety and the trafficability are affected due to the fact that the ground clearance of a working plane patterned edge plate installed on a flat car is too high.

Description

Technical Field

[0001] This invention relates to the field of transportation equipment technology, and more specifically, to a frame assembly for a flatbed truck and the flatbed truck itself. Background Technology

[0002] In the flatbed truck industry, traditional designs typically connect the chassis frame to the flatbed superstructure (usually a rectangular tube structure) using U-bolts or connecting angle irons. While this connection method meets the basic functional requirements of flatbed trucks to some extent—namely, carrying and transporting non-removable fixed equipment such as excavators, loaders, and harvesters—it has significant drawbacks and limitations in practical applications. The main issue is that the connection structure between the flatbed superstructure's working surface (ribbed plate) and the chassis frame results in an excessively high ground clearance, generally around 100mm. This height restriction not only increases safety risks during transport but also significantly reduces the adaptability of flatbed trucks in height-restricted areas such as older urban areas, where cables and power lines often cannot accommodate the increased height required for transport vehicles.

[0003] No effective solution has yet been proposed to address the above issues. Summary of the Invention

[0004] The main objective of this invention is to provide a frame assembly and a flatbed truck for use in flatbed trucks, so as to solve the technical problem in the prior art where the working plane rib plate on the flatbed truck is too high off the ground, which affects transportation safety and passability.

[0005] To achieve the above objectives, according to one aspect of the present invention, a frame assembly for a flatbed truck is provided, comprising: two longitudinal beams arranged opposite to each other along the width direction of the vehicle; multiple crossbeams arranged at intervals along the length direction of the longitudinal beams, with each crossbeam's ends connected to the longitudinal beams on both sides; and a connecting assembly located outside the longitudinal beams and connected to them, with a portion of the connecting assembly protruding from the top surface of the longitudinal beams; wherein a loading space is formed between the protruding portion of the connecting assembly and the longitudinal beams, the loading space being used to mount the flatbed superstructure assembly.

[0006] Furthermore, the length of the connecting component is smaller than the length of the longitudinal beam.

[0007] Furthermore, the connecting assembly has a first connecting plate, a second connecting plate, a third connecting plate, and a fourth connecting plate along the length direction of the longitudinal beam. The first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate are arranged at intervals in sequence, and / or the first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate are connected in sequence.

[0008] Furthermore, both ends of the first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate are provided with positioning holes, and the first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate are connected to the longitudinal beam through positioning elements passing through the positioning holes.

[0009] Furthermore, the frame assembly includes: a crossbeam connection assembly, which is provided in multiple ways. The crossbeam connection assemblies are disposed at both ends of the crossbeam located in the loading space, and each crossbeam connection assembly is connected to the crossbeam.

[0010] Furthermore, the crossbeam connecting assembly includes: a vertical plate, which abuts against the inner wall of the longitudinal beam, and horizontal plates at both ends of the vertical plate, one of which is located above the top surface of the crossbeam and the other is located below the bottom surface of the crossbeam, and the horizontal plates are riveted to the crossbeam.

[0011] Furthermore, the first connecting plate has an L-shaped structure. The vertical surface of the first connecting plate is connected to the longitudinal beam, and the vertical surface is provided with multiple first connecting holes and multiple second connecting holes. The horizontal surface is located above the top surface of the longitudinal beam and extends towards the side away from the longitudinal beam. The first connecting plate is connected to the longitudinal beam through the first connecting holes, and the first connecting plate is connected to the vertical plate through the second connecting holes.

[0012] Furthermore, the two ends of the bottom plate crossbeam of the flat plate mounting base assembly are connected to the longitudinal beams. The upper plane of the bottom plate crossbeam is on the same plane as the horizontal plane of the first connecting plate. The working plane of the flat plate mounting base assembly is located above the bottom plate crossbeam, and the working plane is welded to the upper plane of the bottom plate crossbeam and the horizontal plane of the first connecting plate.

[0013] Furthermore, the first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate have the same structure.

[0014] According to another aspect of the invention, a flatbed vehicle is provided, including a frame assembly, the frame assembly being the aforementioned frame assembly.

[0015] Applying the technical solution of this invention, the connecting component is located on the outside of the longitudinal beam, with a portion of the connecting component protruding above the top surface of the longitudinal beam, forming an additional load-bearing surface. The protruding portion of the connecting component and the top of the longitudinal beam form a loading space, which is used to install the flatbed superstructure assembly, eliminating the need for an additional subframe longitudinal beam, simplifying the structure and lowering the center of gravity of the entire flatbed truck. Because the traditional subframe longitudinal beam is eliminated and directly connected to the frame assembly via the connecting component, the working surface of the flatbed superstructure, i.e., the ribbed plate, can be closer to the ground, significantly reducing the ground clearance of the flatbed truck's working surface. This improvement not only enhances the flatbed truck's mobility in height-restricted areas but also reduces the overall vehicle height when transporting tall cargo, enhancing stability and safety during operation. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A structural schematic diagram of an embodiment of the frame assembly according to the present invention is shown;

[0018] Figure 2 A top view of an embodiment of the frame assembly according to the present invention is shown;

[0019] Figure 3 A schematic diagram showing the positioning and connection of an embodiment of the connecting component according to the present invention is provided.

[0020] The above figures include the following reference numerals:

[0021] 1. Longitudinal beams;

[0022] 2. Crossbeam;

[0023] 3. Crossbeam connection assembly;

[0024] 4. Connecting components;

[0025] 5. Positioning holes;

[0026] 6. First connecting component;

[0027] 7. Second connector. Detailed Implementation

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0032] Combination Figures 1 to 3 As shown, according to a specific embodiment of this application, a frame assembly for a flatbed truck is provided.

[0033] Specifically, the frame assembly includes: longitudinal beams 1, two of which are arranged opposite each other along the width direction of the vehicle; multiple crossbeams 2, spaced apart along the length direction of the longitudinal beams 1, with each crossbeam 2 connected to the longitudinal beams 1 on both sides at both ends; and connecting components 4, located on the outside of the longitudinal beams 1 and connected to the longitudinal beams 1, with a portion of the connecting components 4 protruding from the top surface of the longitudinal beams 1; wherein, the protruding portion of the connecting components 4 forms a loading space with the longitudinal beams 1, and the loading space is used to install the flatbed superstructure assembly.

[0034] Applying the technical solution of this invention, the connecting component 4 is located on the outer side of the longitudinal beam 1, with a portion of the connecting component 4 protruding above the top surface of the longitudinal beam 1, forming an additional load-bearing surface. The protruding portion of the connecting component 4 forms a loading space with the upper part of the longitudinal beam 1. This space is used to install the flatbed superstructure assembly without the need for an additional subframe longitudinal beam, simplifying the structure and lowering the center of gravity of the entire flatbed truck. Because the traditional subframe longitudinal beam is eliminated and directly connected to the frame assembly via the connecting component, the working surface of the flatbed superstructure, i.e., the ribbed plate, can be closer to the ground, significantly reducing the ground clearance of the flatbed truck's working surface. This improvement not only enhances the flatbed truck's mobility in height-restricted areas but also reduces the overall vehicle height when transporting tall cargo, enhancing stability and safety during operation.

[0035] Specifically, the length of the connecting component 4 is smaller than the length of the longitudinal beam 1.

[0036] This structural optimization allows for precise positioning and secure connection of the connecting component 4 on the longitudinal beam, while providing the necessary installation space for the flatbed superstructure's crossbeam. By reducing the length of the connecting component 4, not only is its effective connection with the longitudinal beam 1 ensured, but the ground clearance of the flatbed's superstructure working surface is also effectively reduced while maintaining the strength of the chassis assembly. This length adjustment allows the connecting component 4 to more flexibly adapt to longitudinal beams of different specifications, improving the versatility and adaptability of the chassis assembly, thereby enhancing the flatbed's transportation efficiency and safety. The length difference between the connecting component 4 and the longitudinal beam 1 effectively optimizes the chassis assembly design without compromising the overall structural safety, reducing the overall vehicle height and enhancing the vehicle's ability to navigate complex environments.

[0037] In other embodiments, the length of the connecting component 4 can be adjusted according to actual needs to accommodate longitudinal beams of different sizes. This customized design further enhances the applicability and functional performance of the frame assembly.

[0038] Specifically, such as Figure 1 As shown, the connecting assembly 4 has a first connecting plate, a second connecting plate, a third connecting plate, and a fourth connecting plate along the length of the longitudinal beam 1. These connecting plates are arranged at intervals and / or connected sequentially. The connecting assembly 4 is designed as a multi-layered structure, divided into four independent parts along the length of the longitudinal beam 1: the first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate. Each part has its specific function and positional layout. This segmented connecting plate design not only provides the necessary installation space but also optimizes the structural strength and stability of the entire frame assembly.

[0039] In one specific embodiment, the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are arranged at intervals in sequence, which means that these connecting plates are not continuous, but are separated by a certain distance. This helps to reduce the weight of the frame while maintaining sufficient structural strength.

[0040] In another specific embodiment, the first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate can also be connected sequentially to form a continuous connecting strip. In this case, the connecting plates are connected by welding or high-strength bolts to form a seamless structure, which can not only further enhance the lateral rigidity of the frame, but also provide a more coherent and stable support surface for the installation of the flatbed superstructure assembly.

[0041] Whether spaced out or connected continuously, the upper surface of each connecting plate is higher than the top surface of the longitudinal beam 1, forming a protruding load-bearing area for mounting the flat plate upper mounting base plate assembly.

[0042] Specifically, the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are provided with positioning holes at both ends, and the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are connected to the longitudinal beam 1 through positioning parts passing through the positioning holes 5.

[0043] At both ends of each connecting plate, positioning holes are carefully designed and provided. The position and size of these positioning holes are strictly calculated and planned according to the geometric characteristics of the longitudinal beam 1 and the overall design requirements of the frame assembly, in order to ensure that each connecting plate can be accurately aligned and fixed with the longitudinal beam 1.

[0044] In this embodiment, the positioning components typically include positioning bolts, washers, and nuts. The connecting plates and the longitudinal beam 1 are initially connected via these positioning components. After the first, second, third, and fourth connecting plates are in place, the positioning bolts (or other types of positioning components) pass through pre-set positioning holes. Appropriate washers are then used to ensure connection stability and uniform force distribution. Finally, nuts are used to tighten the bolts, thus firmly fixing the connecting plates to the longitudinal beam 1. In this way, each connecting plate can form a stable mechanical connection with the longitudinal beam 1. Moreover, due to the presence of positioning holes, even within the dimensional tolerance range during production, the accurate position of the connecting plates can be guaranteed, avoiding connection instability or stress concentration caused by positional deviations, which could affect the overall strength and transportation safety of the frame assembly.

[0045] Through the cooperation of the positioning holes and positioning components at both ends, each connecting plate (whether it is the first, second, third, or fourth connecting plate) can withstand the load and pressure transmitted from the flatbed superstructure assembly, while ensuring the installation accuracy between the flatbed superstructure assembly and the longitudinal beam 1. This design not only simplifies the assembly process and improves production efficiency, but also enhances the load-bearing capacity and torsional strength of the frame, providing a more stable foundation for the flatbed truck. In particular, by reducing the height of the working plane from the ground, it ensures the operational stability of the vehicle and the safety of the cargo.

[0046] Specifically, such as Figure 2 As shown, the frame assembly includes: a crossbeam connecting assembly 3, and multiple crossbeam connecting assemblies 3 are provided. The crossbeam connecting assemblies 3 are located at both ends of the crossbeam 2 located in the loading space, and each crossbeam connecting assembly 3 is connected to the crossbeam 2.

[0047] In this embodiment, there are 10 crossbeam connecting components 3. Every two crossbeam connecting components 3 are arranged at both ends of a crossbeam 2 in the loading space. The purpose of this design is to ensure that the strength of the crossbeam 2 is balanced along its entire length, to prevent structural deformation or failure due to excessive local stress, and to further improve the connection strength of the connecting components 4.

[0048] Each crossbeam connecting component 3 is connected to the crossbeam 2 by welding or high-strength fasteners (such as rivets and bolts). This connection method not only improves the strength of the crossbeam 2 itself, but more importantly, strengthens the structural integration between the crossbeam 2, the longitudinal beam 1, and the connecting components 4. When the flatbed superstructure assembly is installed above the loading space formed by the connecting components 4, the crossbeam connecting components 3 play a crucial supporting and connecting role. They not only bear the vertical load from the flatbed superstructure assembly, but also transmit horizontal forces, effectively dispersing stress, enhancing the rigidity of the entire frame assembly, and helping to reduce vibration and swaying caused by road bumps during transportation. The addition of the crossbeam connecting components also optimizes the space utilization of the frame assembly, especially for applications that require lowering the working plane's ground clearance. It can provide sufficient connection strength and stability without increasing the extra volume of the frame.

[0049] In another specific embodiment, the number and distribution of the crossbeam connecting components 3 are determined according to the actual size of the flatbed, the design load, and the layout of the crossbeams 2.

[0050] Specifically, the crossbeam connecting assembly 3 includes: a vertical plate, which is abutted against the inner wall of the longitudinal beam 1. Both ends of the vertical plate are provided with horizontal plates, one of which is located above the top surface of the crossbeam 2 and the other is located below the bottom surface of the crossbeam 2. The horizontal plates are riveted to the crossbeam 2.

[0051] The vertical plate fits tightly against the inner wall of the longitudinal beam 1, forming an embedded connection. This maximizes the use of the internal space of the longitudinal beam 1, while the direct contact with the inner wall of the longitudinal beam increases the stability and reliability of the connection, effectively distributing the load transmitted from the crossbeam 2, reducing stress concentration, and thus improving the bending and torsional resistance of the frame assembly.

[0052] Horizontal plates extend from both ends of the vertical plate. This "U"-shaped structure not only increases the contact area between the beam connecting assembly 3 and the beam 2, but also provides additional support points. One horizontal plate is located above the top surface of the beam 2, and the other horizontal plate is located below the bottom surface of the beam 2. This design ensures that the beam connecting assembly 3 can provide support from both the top and bottom directions of the beam 2, forming a closed load-bearing loop, which greatly enhances the bending and shear resistance of the beam 2.

[0053] In this embodiment, through the contact between the vertical plate and the inner wall of the longitudinal beam 1, and the riveting of the horizontal plates at both ends to the crossbeam 2, the crossbeam connecting assembly 3 effectively transfers the load of the crossbeam 2 to the longitudinal beam 1, while ensuring the rigidity of the crossbeam 2 in different directions, reducing the deformation of the frame assembly when transporting heavy loads, and ensuring that the flatbed truck can maintain good structural stability and transportation safety while reducing the height of the working plane from the ground.

[0054] Specifically, such as Figure 3 As shown, the first connecting plate has an L-shaped structure. The vertical surface of the first connecting plate is connected to the longitudinal beam 1, and the vertical surface is provided with multiple first connecting holes and multiple second connecting holes. The horizontal surface is located above the top surface of the longitudinal beam 1 and extends towards the side away from the longitudinal beam 1. The first connecting plate is connected to the longitudinal beam through the first connecting holes, and the first connecting plate is connected to the vertical plate through the second connecting holes.

[0055] The vertical surface of the first connecting plate is tightly connected to the longitudinal beam 1, and multiple first and second connecting holes are distributed on the vertical surface. The placement of these holes is not arbitrary but carefully calculated and designed to ensure the precision and strength of the connection. The first connecting holes are mainly used for the connection between the first connecting plate and the longitudinal beam 1. The first connecting piece 6 passes through the first connecting hole and is fixed to the longitudinal beam 1, achieving precise positioning and stable installation of the first connecting plate. This connection method not only ensures the vertical force transmission between the connecting plate and the longitudinal beam but also effectively disperses the stress at the connection point by increasing the number of contact points, avoiding excessive stress concentration, extending the service life of the frame assembly, and improving the overall structural rigidity.

[0056] The second connecting hole serves to connect the first connecting plate to the vertical plate of the crossbeam connecting assembly 3. By passing the second connecting piece 7 (in this embodiment, the second connecting piece is an M14 bolt or other suitable fastener) through the second connecting hole, the first connecting plate forms a stable mechanical connection with the vertical plate. This connection method not only enhances the lateral support capacity of the first connecting plate but also provides additional stability for the loading of the base plate on the flatbed, ensuring that the structural strength of the frame and the safety of cargo transportation are not sacrificed while reducing the ground clearance of the working plane.

[0057] The horizontal plane of the first connecting plate is located above the top surface of the longitudinal beam 1 and extends towards the side away from the longitudinal beam 1, providing a flat surface for the installation of the flatbed superstructure base plate crossbeam. By aligning and connecting the bottom of the flatbed superstructure base plate crossbeam with the horizontal plane of the first connecting plate, the distance between the working plane of the superstructure and the ground can be effectively reduced, thereby lowering the overall vehicle height and enhancing the flatbed truck's ability to pass through narrow urban roads and height-restricted areas, especially when dealing with height restrictions such as cables and wires in old urban areas.

[0058] Specifically, the two ends of the bottom plate crossbeam of the bottom plate assembly on the flat plate are connected to the longitudinal beam 1. The upper plane of the bottom plate crossbeam is on the same plane as the horizontal plane of the first connecting plate. The working plane of the bottom plate assembly on the flat plate is located above the bottom plate crossbeam, and the working plane is welded to the upper plane of the bottom plate crossbeam and the horizontal plane of the first connecting plate.

[0059] The two ends of the floor crossbeam are directly connected to the longitudinal beam 1. This design breaks away from the traditional longitudinal beams of the subframe of the flatbed truck's floor, simplifying the structure and reducing weight. The direct connection between the floor crossbeam and the longitudinal beam 1 uses the horizontal plane of the first connecting plate as a reference, ensuring that the upper surface of the floor crossbeam is flush with the horizontal plane of the first connecting plate. This flush connection design not only provides a flat and stable foundation for the installation of the flatbed truck's floor but also effectively reduces the vertical distance between the working surface of the flatbed truck and the ground, thereby lowering the overall vehicle height and significantly improving the vehicle's mobility on urban roads and in areas with height restrictions.

[0060] The working surface (usually a ribbed plate used to support cargo) of the flatbed's floor assembly is located above the floor beam, and the working surface, the upper surface of the floor beam, and the horizontal surface of the first connecting plate are welded together to form an integrated structure. Welding, as a high-strength connection method, ensures a seamless connection between the working surface, the floor beam, and the first connecting plate, forming a rigid whole and enhancing the overall structural strength and torsional resistance of the flatbed. This welded connection design not only effectively reduces the ground clearance of the working surface but also ensures the stability and safety of the flatbed when transporting heavy loads.

[0061] By aligning the upper plane of the base plate crossbeam with the horizontal plane of the first connecting plate, and then directly welding the working plane onto these planes, this invention achieves the dual goals of optimizing the height of the flatbed truck frame assembly and enhancing structural stability. This innovative design not only enables the flatbed truck to adapt to more transportation needs, especially in scenarios requiring a lower center of gravity and height, but also simplifies the assembly process, reduces manufacturing costs, and improves the overall performance and market competitiveness of the vehicle by reducing unnecessary connecting parts.

[0062] Specifically, the first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate have the same structure.

[0063] The first, second, third, and fourth connecting plates adopt a unified design concept in their design and structure. This means that they each exhibit the same geometric features, connection mechanisms, and material selection, thereby ensuring consistent mechanical performance and installation precision at all key nodes of the vehicle frame assembly. This standardized and modular component design strategy not only simplifies the production and assembly process and reduces manufacturing costs, but also significantly improves the reliability and ease of maintenance of the entire frame assembly.

[0064] The first, second, third, and fourth connecting plates are all made of alloy steel or other high-strength metal materials with high yield strength and good weldability to meet the stringent strength and toughness requirements of the structural components under complex working conditions.

[0065] According to another aspect of the invention, a flatbed vehicle is provided, including a frame assembly, the frame assembly being the aforementioned frame assembly.

[0066] When using the flatbed truck frame assembly of this application for transportation operations, firstly, the longitudinal beams 1 and crossbeams 2 constitute the basic frame. The longitudinal beams 1 are arranged along the width direction of the vehicle, and the crossbeams 2 are spaced along the length direction of the longitudinal beams 1, providing necessary lateral support for the frame. Subsequently, the connecting assembly 4, namely the L-shaped outer connecting plate, is installed on the outside of the longitudinal beams 1. The portion protruding from the top surface of the longitudinal beams 1 forms a loading space for installing the flatbed superstructure floor assembly. The loading space is formed by the precise positioning of the L-shaped outer connecting plate and the longitudinal beams and the connection with M14 bolts. This structure not only ensures the stability of the connection but also effectively reduces the installation height of the superstructure floor assembly. Next, the floor crossbeam of the flatbed superstructure floor assembly is directly connected flush with the L-shaped outer connecting plate. The ribbed plate, i.e., the working plane, is fixed to the floor crossbeam and the L-shaped outer connecting plate by welding, achieving a significant reduction in the height of the working plane from the ground. The entire installation process does not require the use of traditional U-bolts or connecting angle irons, simplifying the assembly process and improving the transportation capacity and safety of the flatbed truck in urban roads and height-restricted areas. Through this series of assembly steps, the chassis assembly of this application effectively solves the technical problem that the excessive height of the working plane above the ground on traditional flatbed trucks affects transportation adaptability and safety while ensuring structural strength and stability.

[0067] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects: A connecting component 4 (i.e., an L-shaped outer connecting plate) is added to the chassis assembly. The rectangular tube longitudinal beam of the flatbed upper body assembly can be eliminated. The crossbeam of the upper body assembly is connected to the connecting component 4 of the chassis assembly by means of bolting or welding (the upper plane of the crossbeam is flush with the horizontal plane of the connecting component 4). The working plane (ribbed plate) of the flatbed upper body is connected to the horizontal plane of the upper body base beam and the connecting component 4 by welding, effectively reducing the height of the working plane (ribbed plate) of the flatbed upper body, reducing the overall cargo height of the vehicle, and improving the passability and safety of operation.

[0068] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0069] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0070] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0071] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A frame assembly for a flatbed truck, characterized in that, include: Longitudinal beam (1), two longitudinal beams (1) are provided, and the two longitudinal beams (1) are arranged opposite each other along the width direction of the vehicle; A crossbeam (2) is provided, and the multiple crossbeams (2) are spaced apart along the length direction of the longitudinal beam (1). The two ends of each crossbeam (2) are respectively connected to the longitudinal beams (1) on both sides. A connecting component (4) is located on the outside of the longitudinal beam (1) and is connected to the longitudinal beam (1). A portion of the connecting component (4) protrudes from the top surface of the longitudinal beam (1). The connecting component (4) protrudes and forms a loading space between itself and the longitudinal beam (1), and the loading space is used to install the flat plate mounting base plate assembly.

2. The frame assembly according to claim 1, characterized in that, The length of the connecting component (4) is smaller than the length of the longitudinal beam (1).

3. The frame assembly according to claim 1 or 2, characterized in that, The connecting component (4) has a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate along the length direction of the longitudinal beam (1). The first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are arranged at intervals in sequence, and / or the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are connected in sequence.

4. The frame assembly according to claim 3, characterized in that, The first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are provided with positioning holes (5) at both ends. The first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are connected to the longitudinal beam (1) through the positioning holes (5) by positioning members.

5. The frame assembly according to claim 3, characterized in that, The chassis assembly includes: A beam connecting assembly (3) is provided in multiple ways. The beam connecting assembly (3) is located at both ends of the beam (2) located in the loading space. Each beam connecting assembly (3) is connected to the beam (2).

6. The frame assembly according to claim 5, characterized in that, The beam connection assembly (3) includes: A vertical plate is provided, which is in contact with the inner wall of the longitudinal beam (1). Both ends of the vertical plate are provided with horizontal plates. One of the horizontal plates is located above the top surface of the crossbeam (2), and the other horizontal plate is located below the bottom surface of the crossbeam (2). The horizontal plates are riveted to the crossbeam (2).

7. The frame assembly according to claim 6, characterized in that, The first connecting plate has an L-shaped structure. The vertical surface of the first connecting plate is connected to the longitudinal beam (1), and the vertical surface is provided with a plurality of first connecting holes and a plurality of second connecting holes. The horizontal surface of the first connecting plate is located above the top surface of the longitudinal beam (1), and the horizontal surface extends toward the side away from the longitudinal beam (1). The first connecting plate is connected to the longitudinal beam through the first connecting holes, and the first connecting plate is connected to the vertical plate through the second connecting holes.

8. The frame assembly according to claim 7, characterized in that, The two ends of the bottom plate crossbeam of the plate mounting assembly are connected to the longitudinal beam (1). The upper plane of the bottom plate crossbeam is on the same plane as the horizontal plane of the first connecting plate. The working plane of the plate mounting assembly is located above the bottom plate crossbeam, and the working plane is welded to the upper plane of the bottom plate crossbeam and the horizontal plane of the first connecting plate.

9. The frame assembly according to claim 8, characterized in that, The first connecting plate, the second connecting plate, the third connecting plate, and the fourth connecting plate have the same structure.

10. A flatbed truck, comprising a frame assembly, characterized in that, The frame assembly is the frame assembly according to any one of claims 1 to 9.

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