A load-bearing amphibious vehicle body structure

Abstract

The utility model belongs to the carrying amphibious vehicle body structure in amphibious vehicle technical field. Bottom longitudinal beam (1) connects many bottom cross beams (2), left middle longitudinal beam (3) and right middle longitudinal beam (4) connect many middle cross beams (5), bottom longitudinal beam (1), bottom cross beam (2), left middle longitudinal beam (3), right middle longitudinal beam (4), middle cross beam (5) are connected with the body frame (6) respectively, and bottom cross beam (2), left middle longitudinal beam (3) and right middle longitudinal beam (4) are also connected with the body frame (6) through many vertical beams (14). The carrying amphibious vehicle body structure, simple structure can directly bear external load, the body itself is high in strength, reduces the whole vehicle quality, and the price is lower than other structures, is suitable for mass production.

Description

Technical Field

[0001] This utility model belongs to the field of amphibious vehicle technology, and more specifically, it relates to a load-bearing amphibious vehicle body structure. Background Technology

[0002] Amphibious assault vehicles are special operations vehicles that combine land mobility and waterborne capabilities. Their sealed hull design enables them to navigate and float on water, while on land they can adapt to complex terrain and possess all-terrain mobility. The amphibious hull provides armor protection and a sealed design, while also providing mounting interfaces for power, transmission, and other modules. The monocoque chassis lacks independent beams, with the body directly participating in load transfer. The body itself has high strength, increasing protection for the crew and internal facilities. Due to the simplified high-strength beams, the overall weight of the monocoque chassis is lighter than that of a non-monocoque chassis. Because of these advantages, amphibious assault vehicles mostly adopt a monocoque chassis. Existing amphibious assault vehicle hulls initially followed the structure of traditional tank hulls, using rolled homogeneous steel approximately 50mm thick. Current amphibious assault vehicle hulls primarily use homogeneous armor (or ballistic aluminum alloy) combined with Kevlar composite plates. Using thick rolled homogeneous steel as the traditional structure increases the vehicle's overall weight, hinders high-speed waterborne navigation, and results in higher energy consumption for the amphibious propulsion system. Homogeneous armor with Kevlar composite plates can reduce the overall weight, but composite materials are expensive.

[0003] The prior art includes a technology entitled "A Frame Assembly for an Amphibious Special Vehicle" with publication (announcement) number "CN113320596A". This technology discloses a frame assembly for an amphibious special vehicle, which includes a front longitudinal beam, a front crossbeam, a front lower crossbeam, a front side vertical beam, a front U-shaped beam, a front vertical beam, a front bottom longitudinal beam, a middle longitudinal beam, a #1 crossbeam, a #2 crossbeam, a middle bottom longitudinal beam, a side longitudinal beam, a portal beam, a connecting rod, a hull mounting plate, a rear bulkhead beam, a door bar, a rear longitudinal beam, a side bar, a rear lower crossbeam, a rear side vertical beam, a rear U-shaped beam, a rear vertical beam, a cylinder arm, a front power mounting bar, a rear power mounting bar, a spray pump mounting seat, a crossbeam, a rear crossbeam, and a main roll cage. All components are made of titanium alloy, formed by special stamping and bending, and then assembled and welded into a complete frame under the control of tooling fixtures. This frame assembly is scientifically designed, structurally sound, and has good load-bearing capacity. It can easily assemble various types of engines, key components, and hydrofoil devices, better meeting the urgent need for developing various lightweight, high-speed amphibious special vehicles. However, this technology does not address the technical issues and solutions of this application. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a load-bearing amphibious vehicle body structure that is simple in structure, can directly bear external loads, has high body strength, reduces the overall vehicle weight, is cheaper than other structures, and is suitable for mass production, in order to address the shortcomings of the existing technology.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: This utility model is a load-bearing amphibious vehicle body structure. The bottom longitudinal beam is connected to multiple bottom cross beams, the middle left longitudinal beam and the middle right longitudinal beam are connected to multiple middle cross beams, and the bottom longitudinal beam, bottom cross beam, middle left longitudinal beam, middle right longitudinal beam and middle cross beam are respectively connected to the vehicle body frame. The bottom cross beam, middle left longitudinal beam and middle right longitudinal beam are also connected to the vehicle body frame through multiple vertical beams.

[0006] The vehicle body frame is wrapped with an outer panel, which includes a bottom outer panel connected to the bottom of the vehicle body frame and four outer panels connected to the four sides of the vehicle body frame.

[0007] The bottom outer plate is provided with a spray pump inlet, and the rear outer plate at the rear of the surrounding outer plates is provided with a spray pump outlet.

[0008] The bottom outer plate of the spray pump inlet is provided with a thickened section.

[0009] The vehicle body frame is provided with multiple main reduction axle mounting brackets on each side.

[0010] The bottom outer plate has protruding teeth or grooves along its edge, and the four outer plates have protruding teeth or grooves along their edges. The protruding teeth on the bottom outer plate and the grooves on the four outer plates engage with each other.

[0011] The bottom outer plate and the surrounding outer plates are welded together.

[0012] The bottom outer plate and the thickened part have a flattened transition structure.

[0013] The bottom outer plate and surrounding outer plates were welded using low-hydrogen austenitic ER307Mo welding wire under gas metal arc (GMA) shielded welding. The skin and frame were also welded using this method. The working principle and beneficial effects of this utility model are as follows: The amphibious vehicle body structure described in this utility model features a single bottom longitudinal beam and multiple bottom crossbeams arranged at intervals from the front to the rear of the vehicle. The bottom longitudinal beam and the multiple bottom crossbeams are interconnected and can be welded. The bottom crossbeams primarily correspond to the outer suspension hardpoints to offset the forces transmitted from the suspension to the vehicle body. The bottom longitudinal beam and bottom crossbeams form a bottom mesh structure, providing mounting hardpoints for the vehicle's powertrain and transmission systems, effectively improving the reliability and stability of the powertrain and transmission systems after installation. Two longitudinal beams are located in the middle, namely the left and right middle longitudinal beams. These middle longitudinal beams and middle crossbeams form a central mesh structure, enhancing the vehicle body's resistance to bending and torsion, and effectively offsetting the forces transmitted from the suspension. The middle longitudinal beam and the bottom longitudinal beams form a double-layer mesh structure. The bottom outer panel and the surrounding outer panels wrap around the vehicle frame from the outside, forming a closed body structure. By improving the structure of the joint between the bottom outer plate and the four outer plates, the bottom outer edge can bear part of the water pressure and impact load for the four outer plates, while avoiding the direct pressure on the connecting weld. Attached Figure Description

[0014] The following is a brief explanation of the contents depicted in the accompanying drawings and the markings therein: Figure 1 This is a structural schematic diagram of the load-bearing amphibious vehicle body structure described in this utility model; Figure 2 This is a structural schematic diagram of the load-bearing amphibious vehicle body structure described in this utility model; Figure 3 This is a structural schematic diagram of the load-bearing amphibious vehicle body structure described in this utility model; Figure 4 This is a structural schematic diagram of the load-bearing amphibious vehicle body structure described in this utility model; Figure 5 This is a structural schematic diagram of the load-bearing amphibious vehicle body structure described in this utility model; Figure 6 This is a structural schematic diagram of the load-bearing amphibious vehicle body structure described in this utility model; Figure 7 This is a structural schematic diagram of the load-bearing amphibious vehicle body structure described in this utility model; Figure 8 This is a structural schematic diagram of the load-bearing amphibious vehicle body structure described in this utility model; The markings in the attached diagram are as follows: 1. Bottom longitudinal beam; 2. Bottom transverse beam; 3. Middle left longitudinal beam; 4. Middle right longitudinal beam; 5. Middle transverse beam; 6. Body frame; 7. Bottom outer panel; 8. Surrounding outer panels; 9. Spray pump inlet; 10. Rear outer panel; 11. Spray pump outlet; 12. Thickened section; 13. (Two different markings above) Main reduction axle mounting bracket; 14. Vertical beam; 15. Flattened transition structure. Detailed Implementation

[0015] The following description, with reference to the accompanying drawings, provides a more detailed explanation of the specific embodiments of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the functions and working principles of each part: As attached Figure 1 -Appendix Figure 8 As shown, this utility model is a load-bearing amphibious vehicle body structure. A bottom longitudinal beam 1 connects to multiple bottom crossbeams 2, and a middle left longitudinal beam 3 and a middle right longitudinal beam 4 connect to multiple middle crossbeams 5. The bottom longitudinal beam 1, bottom crossbeams 2, middle left longitudinal beam 3, middle right longitudinal beam 4, and middle crossbeams 5 are respectively connected to the vehicle body frame 6. The bottom crossbeams 2, middle left longitudinal beam 3, and middle right longitudinal beam 4 are also connected to the vehicle body frame 6 via multiple vertical beams 14. To address the shortcomings of existing technologies, an improved technical solution is proposed. In this structural design, a single bottom longitudinal beam 1 is used at the bottom, and multiple bottom crossbeams 2 are arranged with gaps between the front and rear of the vehicle body. The bottom longitudinal beam 1 and the multiple bottom crossbeams 2 are interlocked and fixedly connected, and can be welded. The bottom crossbeams 2 mainly correspond to the outer suspension hardpoints to offset the forces transmitted from the suspension to the vehicle body. The bottom longitudinal beam 1 and bottom crossbeams 2 form a bottom mesh structure, providing mounting hardpoints for the vehicle's power system and transmission system, effectively improving the reliability and stability of the power system and transmission system after installation. There are two longitudinal beams in the middle, namely the left middle longitudinal beam 3 and the right middle longitudinal beam 4. The middle longitudinal beam and the middle cross beam form a central mesh structure, which effectively enhances the vehicle body's resistance to bending and torsion, and effectively counteracts the forces transmitted from the suspension. The middle longitudinal beam and the bottom longitudinal beam form a double-layer mesh structure, improving the overall strength of the vehicle body. The load-bearing amphibious vehicle body structure described in this utility model is simple in structure, can directly bear external loads, has high body strength, reduces the overall vehicle weight, and is cheaper than other structures, making it suitable for mass production.

[0016] The vehicle body frame 6 is externally wrapped with outer panels, which include a bottom outer panel 7 connected to the bottom of the vehicle body frame 6 and four outer panels 8 connected to the four sides of the vehicle body frame 6. In this structure, the bottom outer panel 7 and the four outer panels 8 wrap around the vehicle body frame from the outside, forming a closed vehicle body structure.

[0017] The bottom outer plate 7 is provided with a water inlet 9 for the spray pump, and the rear outer plate 10 of the surrounding outer plates 8 is provided with a water outlet 11 for the spray pump. A thickened portion 12 is provided at the location of the water inlet 9 on the bottom outer plate 7. In this structure, the bottom surface of the vehicle body has a water inlet for the spray pump (water jet propulsion inlet), and the rear has a water outlet for the spray pump (water jet propulsion outlet). The water jet propulsion is installed above the bottom outer plate 7, and the location of the bottom outer plate 7 where the water jet propulsion is installed uses a locally thickened structure, forming the thickened portion 12, to ensure the stability of the water jet propulsion installation. A flattened transition structure 15 is used at the transition between the thinner bottom outer plate 7 and the thickened portion 12. This structure can reduce stress concentration at the transition and provide fatigue strength, such as... Figure 6 As shown.

[0018] The vehicle body frame 6 has multiple main reduction axle mounting brackets 13 on each side. In the above structure, the main reduction axle mounting brackets on the side of the vehicle body not only provide mounting support for the reduction axles, but also provide support for the external swing arm mounting points, and at the same time, a water seal plate is provided to ensure the sealing performance of the vehicle body.

[0019] The bottom outer plate 7 has protruding teeth or grooves along its edges, and the surrounding outer plates 8 also have protruding teeth or grooves along their edges. The protruding teeth on the bottom outer plate 7 engage with the grooves on the surrounding outer plates 8, and the grooves on the bottom outer plate 7 engage with the protruding teeth on the surrounding outer plates 8. This structure improves the structure of the joint between the bottom outer plate and the surrounding outer plates, allowing the bottom outer edge to bear part of the water pressure and impact load for the surrounding outer plates, while avoiding direct pressure on the connecting weld.

[0020] The bottom outer plate 7 and the surrounding outer plates 8 are welded together. A flattened transition structure 15 connects the bottom outer plate 7 and the thickened portion 12. The bottom outer plate 7 and the surrounding outer plates 8 are welded using low-hydrogen austenitic ER307Mo welding wire under gas metal arc (GMA) shielded welding. This structure provides good strength matching between the welding wire used on the bottom outer plate and the surrounding outer plates, and the wire is non-magnetic, resulting in good stealth performance.

[0021] The amphibious vehicle body structure described in this utility model uses ER307mo welding wire for welding the high-strength steel skin and the low-alloy high-strength steel body frame. While the high-strength steel skin offers good protective performance, its processing and manufacturing properties are poor. The low-alloy high-strength steel, on the other hand, has good formability and is inexpensive. The combination creates a hard-surface, tough-core structure, effectively meeting the application requirements.

[0022] The amphibious vehicle body structure described in this utility model features a single bottom longitudinal beam 1 and multiple bottom crossbeams 2 arranged at intervals from the front to the rear of the vehicle. The bottom longitudinal beam 1 and the multiple bottom crossbeams 2 are interlocked and fixedly connected, and can be welded. The bottom crossbeams 2 mainly correspond to the outer suspension hardpoints to offset the forces transmitted from the suspension to the vehicle body. The bottom longitudinal beam 1 and bottom crossbeams 2 form a bottom mesh structure, providing mounting hardpoints for the vehicle's power system and transmission system, effectively improving the reliability and stability of the power system and transmission system after installation. Two longitudinal beams are located in the middle, namely the middle left longitudinal beam 3 and the middle right longitudinal beam 4. The middle longitudinal beam and the middle crossbeam form a central mesh structure, effectively enhancing the vehicle body's resistance to bending and torsion, and effectively offsetting the forces transmitted from the suspension. The middle longitudinal beam and the bottom longitudinal beams form a double-layer mesh structure, improving the overall strength of the vehicle body. The bottom outer panel 7 and the surrounding outer panels 8 wrap around the vehicle frame from the outside, forming a closed body structure. By improving the structure of the joint between the bottom outer plate and the four outer plates, the bottom outer edge can bear part of the water pressure and impact load for the four outer plates, while avoiding the direct pressure on the connecting weld.

[0023] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A load-bearing amphibious vehicle body structure, characterized in that: The bottom longitudinal beam (1) connects to multiple bottom cross beams (2), the middle left longitudinal beam (3) and the middle right longitudinal beam (4) connect to multiple middle cross beams (5), the bottom longitudinal beam (1), the bottom cross beam (2), the middle left longitudinal beam (3), the middle right longitudinal beam (4) and the middle cross beam (5) are respectively connected to the body frame (6), the bottom cross beam (2), the middle left longitudinal beam (3) and the middle right longitudinal beam (4) are also connected to the body frame (6) through multiple vertical beams (14).

2. The amphibious vehicle body structure according to claim 1, characterized in that: The vehicle frame (6) is wrapped with an outer panel, which includes a bottom outer panel (7) connected to the bottom of the vehicle frame (6) and a four-sided outer panel (8) connected to the four sides of the vehicle frame (6).

3. The amphibious vehicle body structure according to claim 2, characterized in that: The bottom outer plate (7) is provided with a spray pump inlet (9), and the rear outer plate (10) of the surrounding outer plates (8) is provided with a spray pump outlet (11).

4. The amphibious vehicle body structure according to claim 3, characterized in that: The bottom outer plate (7) of the spray pump inlet (9) is provided with a thickened part (12).

5. The load-bearing amphibious vehicle body structure according to claim 1 or 2, characterized in that: The vehicle frame (6) is provided with multiple main deceleration axle mounting brackets (13) on each side.

6. The amphibious vehicle body structure according to claim 2 or 3, characterized in that: The bottom outer plate (7) is provided with protruding teeth or grooves on its edge, and the four outer plates (8) are provided with protruding teeth or grooves on their edges. The protruding teeth on the edge of the bottom outer plate (7) and the grooves on the edge of the four outer plates (8) engage with each other. The grooves on the edge of the bottom outer plate (7) and the protruding teeth on the edge of the four outer plates (8) engage with each other.

7. The load-bearing amphibious vehicle body structure according to claim 2 or 3, characterized in that: The bottom outer plate (7) and the surrounding outer plates (8) are welded together.

8. The amphibious vehicle body structure according to claim 4, characterized in that: The bottom outer plate (7) and the thickened part (12) are connected by a flattened transition structure.

9. The load-bearing amphibious vehicle body structure according to claim 2 or 3, characterized in that: The bottom outer plate (7) and the surrounding outer plates (8) are welded using low-hydrogen austenitic ER307Mo welding wire with gas metal arc shielded welding.

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