A mechanized heavy-duty amphibious bridge support structure

Abstract

This invention discloses a mechanized heavy-duty amphibious bridge support structure, comprising a bridge body, a central box, side boxes rotatably connected to the central box, and a drive assembly. The drive assembly can drive the side boxes to rotate between a stowed position and a flat position. The support assembly includes a support plate, a waterproof sleeve, and a telescopic assembly. The telescopic assembly is disposed inside the waterproof sleeve and drives the support plate to move between a supported position and a retracted position. A water propulsion assembly is disposed on the bridge body to drive the bridge body to navigate on water. This invention features an ingenious structural design and a high degree of automation. During bridge erection, the telescopic assembly drives the support plate to contact the seabed or land to support the central box, ensuring the stability of the bridge structure. During water navigation, the waterproof sleeve increases the volume of the device, thereby increasing the load capacity and improving water transport efficiency.

Description

Technical Field

[0001] This invention relates to the field of amphibious bridge technology, and in particular to a mechanized heavy-duty amphibious bridge support structure. Background Technology

[0002] Currently, the commonly used equipment in the domestic civilian disaster relief field mainly includes two categories: emergency mechanized bridges and emergency powered floating bridges. These are used to restore land transportation and water transportation, respectively. Emergency bridge equipment that combines the above two functions into one, that is, emergency bridge equipment that can simultaneously erect fixed bridges on land and floating bridges on water, is still in the early stage of development in China, but it is in line with the future development trend of emergency rescue support equipment.

[0003] For example, in the prior art, Chinese invention patent application with publication number CN112538815A discloses an amphibious bridge suitable for loading and unloading transportation of automobiles, including a bridge vehicle, a frame, a bridge body, a mobile frame, a mounting frame, a mounting cylinder, and a water propulsion device. This amphibious bridge combines a land dry ditch bridge and a water ferry into one, which can overcome dry ditch obstacles on land and river obstacles on water, meeting the dual needs of materials and equipment to pass smoothly through water and land obstacles.

[0004] However, when the aforementioned amphibious bridges are built on either water or land, the two ends of the bridge body are in contact with the ground, meaning that the bridge body is only supported at the two ends, while the center lacks support. This results in poor structural stability and limited load-bearing capacity, making the center of the bridge body prone to deformation due to excessive load. In severe cases, the bridge body may even break and be damaged. Moreover, when the bridge body is navigating on the water, the fixed volume of the bridge body means that the maximum buoyancy force on the bridge body is fixed, which in turn limits the load capacity of the bridge body and affects the transportation efficiency of water navigation.

[0005] Therefore, it is necessary to improve the existing dual-purpose bridges for both water and land. Summary of the Invention

[0006] This invention provides a mechanized heavy-duty amphibious bridge support structure, which enhances the structural stability of the bridge during construction and increases its load-bearing capacity to improve water transport efficiency. The specific technical solution is as follows:

[0007] A mechanized heavy-duty amphibious bridge support structure includes:

[0008] The bridge body includes a long strip-shaped central box, with side boxes of the same width at both ends of the central box. The central box is connected to a drive assembly that drives the side boxes to rotate between a storage position and a flat position. The outer surface of the central box includes two first end faces symmetrically arranged at both ends, a first bottom surface and two first top surfaces connected between the two first end faces. The outer surface of the side boxes includes two relatively parallel second end faces, a second bottom surface and a second top surface connected between the two second end faces. In the storage position, one of the second end faces of the side box is on the same plane as one of the first end faces of the central box, and the second top surface of the side box is in contact with one of the first top surfaces of the central box. In the flat position, the second end face is in contact with the first end face, and the second bottom surface and the first bottom surface are on the same plane.

[0009] The support assembly includes a support plate, a flexible waterproof sleeve with both ends connected to the bridge body and the support plate respectively to form a deformable protective cavity, and a telescopic assembly disposed inside the waterproof sleeve and driving the support plate to move between a support position and a retracted position. In the retracted position, the support plate is located between a first bottom surface and two second top surfaces, and in the support position, the support plate is located on the side of the first bottom surface away from the two second top surfaces.

[0010] The water propulsion component is installed on the bridge body and can drive the bridge body to navigate on the water.

[0011] Furthermore, an air pump is installed on the bridge body, with the input end of the air pump connected to the protective cavity and the output end connected to the outside.

[0012] Furthermore, a vent is provided on one side of the top of the middle box, which connects to the air pump and the outside. The vent is oriented downwards, and the air pump is located inside the middle box.

[0013] Furthermore, the waterproof sleeve is made of waterproof canvas.

[0014] Furthermore, at least two support components are provided, distributed along the length of the middle box.

[0015] Furthermore, the telescopic assembly includes a telescopic frame, one end of which is connected to the support plate, and the other end is connected to a translation unit that drives the telescopic frame to deform.

[0016] Furthermore, the first bottom surface has a first concave blind hole, and a sealing ring is fixed on the circumferential inner wall of the first concave blind hole. The sealing ring is fixedly connected to one end of the waterproof sleeve. In the contracted position, the support plate is received in the first concave blind hole and the circumferential outer edge of the support plate is sealed and fitted with the circumferential inner wall of the first concave blind hole.

[0017] Furthermore, the first bottom surface also has a second concave blind hole, and the water propulsion assembly includes a water propeller that reciprocates within and outside the second concave blind hole and a retractable assembly that drives the water propeller.

[0018] Furthermore, the middle box includes a fixedly connected middle shell and a middle shell cover. One side of the middle shell is open. The first bottom surface is the side of the middle shell cover away from the middle shell. The two first end surfaces are the two end surfaces of the middle shell. The two first top surfaces combine to form a folded and closed top surface of the middle shell. The side box includes a fixedly connected side shell and a side shell cover. One side of the side shell is open. The second bottom surface is the side surface of the side shell cover away from the side shell. The two second end surfaces are the two end surfaces of the side shell. The second top surface is the closed top surface of the side shell.

[0019] Furthermore, the middle shell and the side shell are connected by hinges, and their rotation axes extend along the width direction of the side box to achieve a rotational connection between the middle box and the side box.

[0020] This invention features an ingenious structural design and a high degree of automation. During bridge construction, the telescopic components drive the support plate to contact the bottom of the water or the ground to support the central box, ensuring the stability of the bridge structure. When navigating on water, the waterproof sleeve increases the volume of the device, thereby increasing the load capacity and improving the efficiency of water transport.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0023] Figure 1 This is a schematic diagram of the bridge body side box of the present invention in its storage position;

[0024] Figure 2 yes Figure 1 A structural diagram from another perspective;

[0025] Figure 3 This is a schematic diagram of the structure of the bridge body after it has been unfolded according to the present invention;

[0026] Figure 4 This is a schematic diagram of the bridge body side box of the present invention in a flat position;

[0027] Figure 5 yes Figure 4 Side view;

[0028] Figure 6 yes Figure 4 Top view;

[0029] Figure 7 yes Figure 4 A bottom view;

[0030] Figure 8 This is a schematic diagram of the shell structure in this invention;

[0031] Figure 9 This is a schematic diagram of the connection structure between the waterproof sleeve of the present invention and the bridge body when the sleeve is in the supporting position;

[0032] Figure 10 yes Figure 9 Partial structural diagram;

[0033] Figure 11 yes Figure 10 An explosion diagram;

[0034] Figure 12 This is an exploded view of the connection structure between the telescopic frame, the waterproof sleeve, and the support plate of the present invention. Detailed Implementation

[0035] To better understand the purpose, function, and specific design of this invention, the mechanized heavy-duty amphibious bridge support structure of this invention will be described in further detail below with reference to the accompanying drawings.

[0036] like Figures 1-12 As shown, the mechanized heavy-duty amphibious bridge support structure of the present invention includes a bridge body, which includes a long strip-shaped central box 400. Both ends of the central box 400 are rotatably connected to side boxes 500 of the same width direction. The central box 400 is connected to a drive assembly that drives the side boxes 500 to rotate between a stowed position and a flat position. The outer surface of the central box 400 includes two first end faces 401 symmetrically arranged at both ends, a first bottom surface 402 connected between the two first end faces 401, and two first top surfaces 403. The outer surface of the side boxes 500 includes... Two relatively parallel second end faces 501, a second bottom face 502 and a second top face 503 connected between the two second end faces 501; in the storage position, one of the second end faces 501 of the side box 500 and one of the first end faces 401 of the middle box 400 are located on the same plane, and the second top face 503 of the side box 500 is attached to one of the first top faces 403 of the middle box 400; in the flat position, the second end face 501 is attached to the first end face 401, and the second bottom face 502 and the first bottom face 402 are located on the same plane.

[0037] The bridge body is connected to the support assembly, which includes a support plate 600, a flexible waterproof sleeve 700 that is connected to the bridge body and the support plate 600 at both ends to form a deformable protective cavity, and a telescopic assembly 800 disposed inside the waterproof sleeve 700 and driving the support plate 600 to move between a supported position and a retracted position. In the retracted position, the support plate 600 is located between the first bottom surface 402 and the two second top surfaces 503. In the supported position, the support plate 600 is located on the side of the first bottom surface 402 away from the two second top surfaces 503.

[0038] The bridge is also equipped with a water propulsion component 900, which can drive the bridge to navigate on water.

[0039] Compared to existing amphibious bridges, this invention, when constructing a bridge over a ditch, uses a telescopic component 800 to move the support plate 600 from above the first bottom surface 402 downwards to below it, allowing the support plate 600 to contact the ground or riverbed. This, along with the telescopic component 800, provides stable support for the central box 400, preventing excessive load pressure on the central box 400 during bridge construction, which could lead to bridge deformation or damage. It is understood that the waterproof sleeve 700 can be used either inflated or deflated when used as a bridge structure.

[0040] Furthermore, when the present invention is used for water navigation, the waterproof sleeve 700 is provided outside the telescopic component 800. The waterproof sleeve 700 and the support plate 600 form a protective cavity, which allows the size of the bridge body to change accordingly according to the telescopic deformation of the waterproof sleeve 700. This makes the bridge body's shape variable when used for water navigation, and the degree of change can be adjusted according to the degree of telescopic deformation of the waterproof sleeve 700. In this way, the load-bearing capacity of the bridge body is increased, allowing it to support more personnel and materials when used for water navigation. The deformation of the waterproof sleeve 700 can be adjusted according to the weight it bears, thereby improving transportation efficiency.

[0041] The specific structure of the bridge is as follows: Figures 1-8As shown, the bridge body includes a central box 400 and two side boxes 500, with identical structures for the two side boxes 500. The central box 400 includes a central shell 240 and a central shell cover 241 fixedly connected. One side of the central shell 240 is open. The first bottom surface 402 is the side of the central shell cover 241 away from the central shell 240. The two first end surfaces 401 are the two end surfaces of the central shell 240. The two first top surfaces 403 combine to form a folded and closed top surface of the central shell 240. The side box 500 includes a side shell 250 and a side shell cover 251 fixedly connected. One side of the side shell 250 is open. The second bottom surface 502 is the side of the side shell cover 251 away from the side shell 250. The two second end surfaces 501 are the two end surfaces of the side shell 250. The second top surface 503 is the closed top surface of the side shell 250. The middle shell 240 and the side shell 250 are connected by a hinge 220 to realize the rotational connection between the middle box 400 and the side box 500, and the rotation axis of the two extends along the width direction of the side box 500.

[0042] A drive assembly is provided between the side box 500 and the middle box 400 to drive their relative rotation, as detailed below. Figure 3 , Figure 6-7 as well as Figure 11 As shown, four drive components are provided, corresponding to the four corners of the middle shell cover 241. Each drive component includes a drive cylinder 181. The cylinder barrel of the drive cylinder 181 is hinged to the middle shell 240. The piston rod is hinged to a second connecting rod 182 and a third connecting rod 183 via a pin 184. The second connecting rod 182 and the third connecting rod 183 are respectively hinged to the middle shell 240 and the side shell 250. When the drive cylinder 181 moves its piston rod to extend or retract, the second connecting rod 182 and the third connecting rod 183 act on the middle box 400 and the side box 500 respectively, thereby driving the relative rotational connection between the side box 500 and the middle box 400. This allows the side box 500 to rotate between a storage position and a flat position. In the flat position, as shown... Figure 4-7 As shown, the middle shell cover 241 and the side shell cover 251 are located on the same plane and are smoothly connected. The first top surface 403 and the second top surface 503 are located on the same plane and are smoothly connected. One of the second end surfaces 501 is attached to one of the first end surfaces 401. At this time, the length of the bridge body increases, which can be used to build bridges on water or land to cross ditch obstacles and river obstacles, thereby achieving traffic protection and transportation. In the storage position, on the bridge body, the side shell covers 251 of the two side boxes 500 are arranged parallel to each other directly above the middle shell cover 241 of the middle box 400. The first top surface 403 is attached to the second top surface 503. One of the second end surfaces 501 of the side box 500 is located on the same vertical plane and is smoothly connected to one of the first end surfaces 401 of the middle box 400. At this time, the length of the bridge body decreases, which makes it easier to install on the bridge vehicle and transport it to the bridge construction position by the bridge vehicle.

[0043] In a preferred embodiment, at least two support components are provided, distributed along the length of the middle box 400. Specifically, in this invention, there are four support components, evenly distributed along the length of the middle box 400. By increasing the number of support components, the overall volume of the device formed after the bridge body and the waterproof sleeve 700 are connected is increased, thereby strengthening the load-bearing capacity of the device and improving transportation efficiency.

[0044] In a preferred embodiment, an air pump 270 is provided on the bridge body. The input end of the air pump 270 is connected to the protective cavity, and the output end is connected to the outside.

[0045] During navigation on water and bridge construction, the air pump 270 draws in outside air and delivers it into the protective chamber, increasing the pressure inside the chamber and thus expanding the volume of the waterproof sleeve 700. This prevents the waterproof sleeve 700 from shrinking due to water pressure underwater, reducing the buoyancy of the device and consequently lowering the load-bearing capacity of the bridge structure. After the bridge structure is no longer in use, the air pump 270 draws in the air from the protective chamber and releases it to the outside, causing the waterproof sleeve 700 to shrink, making it easier to store and organize and preventing it from taking up too much space.

[0046] In a preferred embodiment, a vent 404 is provided on one side of the top of the intermediate box 400, connecting the air pump 270 and the outside. The vent 404 is oriented downwards, and the air pump 270 is housed inside the intermediate box 400. With this structure, the air pump 270 is housed inside the intermediate box 400, ensuring stable operation. Simultaneously, the downward orientation of the vent 404 prevents rainwater from entering the protective cavity during rainy weather. Furthermore, the vent 404's location on the top surface of the intermediate box 400 ensures sufficient height difference between the vent 404 and the water surface during bridge construction and navigation, preventing water from entering the vent 404.

[0047] Specifically, such as Figure 11 As shown, a partition 260 is fixed inside the middle box 400, and an air pump 270 is fixed on the partition 260. The air pump 270 is located in the inner cavity of the middle box 400. A vent pipe 244 extending along its thickness direction and sealingly penetrating the middle shell 240 is fixed at the top position of the middle shell 240. The middle part of the vent pipe 244 is connected to the input end of the air pump 270. The two ends of the vent pipe 244 are located below and outside the middle shell 240, with downward vent ports 404, so that the input end of the air pump 270 is connected to the outside through the cavity of the vent pipe 244 and the vent ports 404.

[0048] In a preferred embodiment, the first bottom surface 402 has a first concave blind hole 4021, and a sealing ring 280 is fixed on the circumferential inner wall of the first concave blind hole 4021. The sealing ring 280 is fixedly connected to one end of the waterproof sleeve 700. In the retracted position, the support plate 600 is received in the first concave blind hole 4021 and the circumferential outer edge of the support plate 600 is sealed and fitted with the circumferential inner wall of the first concave blind hole 4021.

[0049] Specifically, such as Figure 5-11 As shown, an upward-facing middle shell cylinder 242 is provided on the middle shell cover 241. There is a gap between the top of the middle shell cylinder 242 and the partition plate 260, allowing the output end of the air pump 270 to communicate with the inner side of the middle shell cylinder 242. A first concave blind hole 4021 is formed inside the middle shell cylinder 242, and a sealing ring 280 is fixed to one end of the waterproof sleeve 700. The outer circumferential edge of the sealing ring 280 is sealed to the inner circumferential wall of the middle shell cylinder 242, allowing the output end of the air pump 270 to communicate with the protective cavity. The air pump 270 outputs from the outside... After the air is drawn into the inside of the waterproof sleeve 700, the pressure inside the waterproof sleeve 700, i.e. the protective cavity, increases. When the air pump 270 draws air from the protective cavity, it reduces the air pressure inside the protective cavity, causing the waterproof sleeve 700 to contract and deform inward. This facilitates the telescopic component 800 to move the support plate 600 closer, allowing the support plate 600 to enter the inside of the middle shell 242 and seal against the inner wall of the middle shell 242. At the same time, it reduces the size of the device, making it easier for the bridge body to be installed on the fixed frame 200.

[0050] In a preferred embodiment, the waterproof sleeve 700 is made of waterproof canvas. Waterproof canvas is a type of canvas that is specially processed for waterproofing, moisture-proofing, and damp-proofing. It is made of fiber fabric and chemical filler materials through production processes such as impregnation, coating, scraping, drying, and cooling. Compared with other canvases, it has beneficial anti-mildew and flame-retardant properties, is 100% waterproof, has excellent softness and high strength, and can withstand tensile strength while being relatively lightweight.

[0051] In a preferred embodiment, the telescopic assembly 800 includes a telescopic frame 801, one end of which is connected to a support plate 600, and the other end is connected to a translation unit 802 that drives the telescopic frame 801 to deform. Specifically, as shown... Figure 11-12As shown, the translation unit 802 is a translation cylinder, with its cylinder barrel fixed below the partition 260. The piston rod is hinged to one end of the top of the telescopic frame 801, and the other end of the top surface of the telescopic frame 801 is hinged to the partition 260. One end of the bottom of the telescopic frame 801 is hinged to the support plate 600, and the other end is hinged to a slider 803. A U-shaped slide rail 804 that slides with the slider 803 is fixed above the support plate 600. When adjusting the position of the support plate 600, the translation unit 802 drives the two ends of the top of the telescopic frame 801 to move closer to each other, causing the telescopic frame 801 to deform. As the length of the telescopic frame 801 changes, the slider 803 at one end of its bottom moves along the slide rail 804, thereby driving the support plate 600 to move up and down, thereby changing the shape of the waterproof sleeve 700. This, combined with the air pump 270, allows for the inflation or deflation of air into the inside of the waterproof sleeve 700 to meet different usage needs.

[0052] Specifically, after the translation unit 802 drives the distance between the top two ends of the telescopic frame 801 to decrease, the length of the telescopic frame 801 increases, causing the support plate 600 to descend and contact the ground to support the middle box 400 and reinforce the bridge structure. Alternatively, the support plate 600 may descend to maintain a certain distance from the first bottom surface 402, giving the waterproof sleeve 700 a certain volume and increasing the load-bearing capacity of the bridge. At the same time, the air pump 270 draws air from the outside and inflates the inside of the waterproof sleeve 700 to ensure the pressure inside the waterproof sleeve 700. When the translation unit 802 drives the distance between the top two ends of the telescopic frame 801 to increase, the length of the telescopic frame 801 decreases. In conjunction with the air pump 270, the air inside the waterproof sleeve 700 is expelled to the outside. This allows the support plate 600 to move upward to the inside of the middle shell 242 while reducing the size of the waterproof sleeve 700, making it easier for the waterproof sleeve 700 to be housed inside the middle shell 242.

[0053] In a preferred embodiment, the first bottom surface 402 also has a second concave blind hole 4022, and the water propulsion assembly 900 includes a water propeller 901 that reciprocates within and outside the second concave blind hole 4022 and a retractable assembly 902 that drives the water propeller 901.

[0054] Specifically, such as Figure 7 and Figure 11As shown, an upward-facing concave barrel 243 is integrally formed on the middle shell cover 241. A connecting hole 230 is provided on the partition plate 260. The connecting hole 230 is a through hole. The outer circumferential edge of the top of the concave barrel 243 is fixedly connected to the inner circumferential wall of the connecting hole 230. A second concave blind hole 4022 is formed on the inner wall of the concave barrel 243. The water propulsion assembly 900 includes a retraction assembly 902, which is a retraction cylinder arranged along the height direction of the bridge body. The cylinder barrel of the retraction cylinder is fixed above the middle shell cover 241. The piston rod seal passes through the middle shell cover 241 and is connected to the water propeller 901 to drive the water propeller 901 to move inside or outside the concave barrel 243 (that is, below the middle shell cover 241). When navigating on water, the piston rod of the retractable hydraulic cylinder extends outward, causing the water propeller 901 to move below the central box 400. The water propeller 901 can generate driving force in the water, enabling the bridge to navigate in the water and complete the erection of the ferry to overcome river obstacles. When the bridge needs to be installed on the fixed frame 200, the piston rod of the retractable hydraulic cylinder retracts, driving the water propeller 901 to move between the first bottom surface 402 and the first top surface 403, so that the water propeller 901 is located in the concave barrel 243, thereby facilitating the placement of the bridge on the first frame 150 and the second frame 160.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mechanized heavy-duty amphibious bridge support structure, characterized in that, include: The bridge body includes a long strip-shaped central box, with side boxes of the same width at both ends of the central box. The central box is connected to a drive assembly that drives the side boxes to rotate between a storage position and a flat position. The outer surface of the central box includes two first end faces symmetrically arranged at both ends, a first bottom surface and two first top surfaces connected between the two first end faces. The outer surface of the side boxes includes two relatively parallel second end faces, a second bottom surface and a second top surface connected between the two second end faces. In the storage position, one of the second end faces of the side box is on the same plane as one of the first end faces of the central box, and the second top surface of the side box is in contact with one of the first top surfaces of the central box. In the flat position, the second end face is in contact with the first end face, and the second bottom surface and the first bottom surface are on the same plane. The support assembly includes a support plate, a flexible waterproof sleeve with both ends connected to the bridge body and the support plate respectively to form a deformable protective cavity, and a telescopic assembly disposed inside the waterproof sleeve and driving the support plate to move between a support position and a retracted position. In the retracted position, the support plate is located between a first bottom surface and two second top surfaces, and in the support position, the support plate is located on the side of the first bottom surface away from the two second top surfaces. The first bottom surface has a first concave blind hole, and a sealing ring is fixed on the circumferential inner wall of the first concave blind hole. The sealing ring is fixedly connected to one end of the waterproof sleeve. In the contracted position, the support plate is received in the first concave blind hole and the circumferential outer edge of the support plate is sealed and fitted with the circumferential inner wall of the first concave blind hole. The water propulsion component is installed on the bridge body and can drive the bridge body to navigate on the water.

2. The mechanized heavy-duty amphibious bridge support structure as described in claim 1, characterized in that, An air pump is installed on the bridge body. The input end of the air pump is connected to the protective cavity, and the output end is connected to the outside.

3. The mechanized heavy-duty amphibious bridge support structure as described in claim 2, characterized in that, A vent is provided on one side of the top of the middle box, which connects to the air pump and the outside. The vent is oriented downwards, and the air pump is located inside the middle box.

4. The mechanized heavy-duty amphibious bridge support structure as described in claim 1, characterized in that, The waterproof sleeve is made of waterproof canvas.

5. The mechanized heavy-duty amphibious bridge support structure as described in claim 1, characterized in that, At least two support components are provided, distributed along the length of the middle box.

6. The mechanized heavy-duty amphibious bridge support structure as described in claim 1, characterized in that, The telescopic assembly includes a telescopic frame, one end of which is connected to the support plate, and the other end is connected to a translation unit that drives the telescopic frame to deform.

7. The mechanized heavy-duty amphibious bridge support structure as described in claim 1, characterized in that, The first bottom surface also has a second concave blind hole, and the water propulsion assembly includes a water propeller that reciprocates within and outside the second concave blind hole and a retractable assembly that drives the water propeller.

8. The mechanized heavy-duty amphibious bridge support structure as described in claim 1, characterized in that, The middle box includes a fixedly connected middle shell and a middle shell cover. One side of the middle shell is open. The first bottom surface is the side of the middle shell cover away from the middle shell. The two first end surfaces are the two end surfaces of the middle shell. The two first top surfaces combine to form a folded and closed top surface of the middle shell. The side box includes a fixedly connected side shell and a side shell cover. One side of the side shell is open. The second bottom surface is the side of the side shell cover away from the side shell. The two second end surfaces are the two end surfaces of the side shell. The second top surface is the closed top surface of the side shell.

9. The mechanized heavy-duty amphibious bridge support structure as described in claim 8, characterized in that, The middle shell and the side shell are connected by hinges, and their rotation axes extend along the width of the side shell to achieve a rotatable connection between the middle shell and the side shell.

Images