A ramp device for a vehicle loading bay that allows vehicles with different wheel tracks to pass safely

Abstract

The present invention discloses a ramp device for a vehicle loading compartment that allows vehicles with different wheel tracks to pass safely. The ramp device comprises a ramp body and an additional platform. The upper and lower ends of the ramp body are fixedly connected to the upper and lower platforms of the loading compartment, respectively, and both sides of the ramp body are fixedly connected to the longitudinal bulkhead of the loading compartment. The front and rear ends of the additional platform are fixedly connected to the rear end of the ramp body and the front bulkhead of the loading compartment, respectively. The bottom end of the ramp body is provided with a flap to reduce the impact of vehicles on the ramp body, and the top end of the ramp body is provided with a deck and a flat plate to reduce the gravity impact of vehicles on the ramp body and the upper platform. The present invention can meet the connection requirements for loading compartment platforms of different heights, eliminate the impact load of vehicles on the ramp body, increase the contact area of wheel tracks when tracked vehicles pass through, and eliminate the gravity impact load generated when tracked vehicles go up and downhill. It improves work safety, reduces the risk of structural damage, and has significant practical effects.

Description

Technical Field

[0001] The invention relates to a ramp device used in a vehicle loading compartment for safe passage of vehicles with different wheel tracks, belonging to the technical field of large-scale passage structures in vehicle loading compartments. Background Art

[0002] Vehicle loading bays are located in carriers that can transport or store vehicle equipment, such as large loading trucks, loading aircraft, roll-on / roll-off ships, or vehicle warehouses, with roll-on / roll-off ships being the most common. To accommodate the transport and storage of more vehicles, loading bays typically feature multiple loading compartments, often connected by ramps. However, in actual transportation operations, we've discovered that due to a certain angle difference, vehicles impact the ramp when they reach the junction of the lower compartments and the ramp. Although the slope of the ramp and the speed of vehicle transportation are not high, resulting in minimal damage from a single impact, fatigue damage to the ramp over time is greater than at other locations. The most serious ones are tracked vehicles. Since the wheels of tracked vehicles are relatively long, when the tracked vehicles are halfway up the ramp in the lower cabin, the middle part of the wheels of the tracked vehicles will be suspended in the air due to the angle difference. Under such conditions, the contact area of the wheel print of the tracked vehicle will be greatly reduced, and there will only be two points at the front and back, which will cause local pressure to increase, causing greater damage to the cabin platform and ramp structure; when the tracked vehicle drives to the connection between the high-rise cabin and the ramp, according to the center of gravity of the tracked vehicle itself, the front end of the vehicle will be suspended in the air for a distance, and then hit the cabin or ramp structure, causing serious damage to the cabin and ramp over time. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to propose a ramp device for a vehicle loading cabin that can provide safe passage for vehicles with different wheel tracks, solve the connection problem between loading cabin platforms of different heights, eliminate the impact of vehicles on the ramp when climbing the lower loading cabin, and at the same time alleviate the high-pressure damage and gravity impact damage to the loading cabin platform and ramp structure caused by crawler vehicles when going uphill and downhill.

[0004] Purpose of the invention: The purpose of the present invention is to provide a ramp device for a vehicle loading compartment that can provide safe passage for vehicles with different wheel tracks.

[0005] Technical solution: The present invention discloses a ramp device for a vehicle loading compartment that allows vehicles with different wheel tracks to safely pass through, comprising a ramp body and an additional platform. The lower end of the ramp body is fixedly connected to the lower platform of the loading compartment, the upper end of the ramp body is fixedly connected to the upper platform of the loading compartment, and both sides of the ramp body are fixedly connected to the longitudinal bulkhead of the loading compartment; the front and rear ends of the additional platform are respectively fixedly connected to the rear end of the ramp body and the front bulkhead of the loading compartment; a flap is provided at the connection between the ramp body and the lower platform of the loading compartment to reduce the impact of vehicles on the ramp body; and a deck and a flat plate are provided above the ramp body and the upper platform of the loading compartment to reduce the gravitational impact of vehicles on the ramp body and the upper platform of the loading compartment.

[0006] Furthermore, both sides of the lower end of the ramp body are movably connected with hydraulic cylinder connecting rods, and the hydraulic cylinder connecting rods are movably connected to the flap. Due to the angle difference at the connection between the lower platform of the loading compartment and the ramp body, a certain impact will be exerted on the ramp device when vehicles pass through, especially tracked vehicles. When climbing here, the wheel tracks will be suspended, resulting in a smaller wheel track contact area and a higher pressure load. The hydraulic cylinder connecting rod is connected to the ramp body, and the flap can be retracted by the hydraulic cylinder connecting rod to increase the loading area of the lower platform of the loading compartment. The hydraulic cylinder connecting rod is divided into a hydraulic cylinder, a front connecting hinge and a rear connecting hinge. The rear connecting hinge is connected to the middle part of the flap, and the front connecting hinge is connected to the ramp body.

[0007] Furthermore, a plurality of struts and a plurality of hydraulic struts are provided in the lower supporting cabin of the ramp body, the middle part of the struts is movably connected to the hydraulic struts, the two ends of the struts are respectively movably connected to the deck and the lower platform of the loading cabin, and the other end of the hydraulic struts is movably connected to the lower platform of the loading cabin.

[0008] Furthermore, a slide rail is fixedly provided on the longitudinal bulkhead of the loading compartment, and both sides of the deck board are embedded in the slide rail.

[0009] Furthermore, a plurality of connecting arms are provided between the flat plate and the additional platform, one end of the connecting arm is movably connected to the flat plate, and the other end is movably connected to the connection between the additional platform and the front bulkhead of the loading compartment.

[0010] Furthermore, the ramp body includes a ramp plate and a supporting structure at the lower part of the ramp body. The ramp plate is provided with a plurality of relatively dense wave-breaking holes, which can eliminate the wave impact on the ramp device caused by water entering the lower platform of the loading compartment and block the wave climbing, while meeting the sliding needs of the planking, so as to facilitate the safety of the ramp device in a water environment.

[0011] Furthermore, the deck is mounted on the top of the ramp body, covering the connection between the loading bay's upper platform and the ramp body. A third hinge eye is fixed to the back of the deck, connected to the struts. Circular lugs are embedded in the slide rails at each end of the deck. Due to the angular difference between the loading bay's upper platform and the ramp body, when a tracked vehicle travels from the loading bay's upper platform to the ramp body, gravity impacts the ramp body. The deck, supported by the struts and guided by the slide rails and struts, can pull the tracked vehicle downhill, avoiding impact loads.

[0012] Furthermore, the flat plate is positioned at the top of the ramp body, with its end connected to the junction of the ramp body and the upper deck, and laid flat on the upper platform of the loading bay. A fourth hinged eye plate is fixed to the front and back of the flat plate, connected to the connecting arm. Second eye plates are located on both sides of the rear end of the flat plate, connected to the ramp body to restrain and support the flat plate.

[0013] Furthermore, the flap and the deck are both arc-shaped structures, and the ramp body, flap, deck and upper portion of the deck are all provided with anti-slip strips. Both sides of the top of the ramp body are provided with first hinges for movably connecting with the flat plate, and both sides of the bottom of the ramp body are provided with second hinges for connecting with the flap.

[0014] Furthermore, a second hinge eye plate is provided on both sides of the flap, and the second hinge eye plate is movably connected to the hydraulic cylinder connecting rod; a first eye plate is provided on both sides of the front end of the flap, and the first eye plate is connected through the second hinge.

[0015] Furthermore, the slide rails are fixed to the longitudinal bulkheads, one set each on each side. These rails consist of outer and inner rails, and are essentially long, curved strips of shell plating fixed to the loading compartment bulkheads. The center of the arc of the slide rails serves as the lower hinge around which the struts rotate. The slide rails guide the vertical movement of the decking and restrict its left-right movement, thereby protecting the strut assembly. Lubrication, such as lubricating oil, can be used between the decking lugs and the slide rails to reduce friction, depending on the actual operating conditions.

[0016] Furthermore, the support rods are provided in multiple groups to strongly support vehicle loads acting on the deck. These include a first support rod, hinged at its upper end to an upper hinge and at its lower end to a lower hinge. A fifth hinge eye is provided in the middle of the support rod. As the deck slides downward, the support rod's supporting effect gradually decreases, and the cylinder support rod bears most of the force. However, due to the length of the support rod and the way it is subjected to force, to ensure sufficient bending strength, the support rod portion is configured as an I-beam structure.

[0017] Furthermore, the cylinder struts are provided in multiple groups, working in conjunction with the struts. Each group includes a hydraulic cylinder, a bottom hinge, and a top hinge. The upper end of the hydraulic cylinder is hinged to the top hinge, while the lower end is hinged to the bottom hinge. The bottom hinge is connected to the eye plate at the connection between the lower platform and the bottom bulkhead of the ramp body. This area has more strong components and provides stronger support. The hinge is connected to the middle hinge eye plate on the strut, which controls the up and down sliding of the strut and is the primary device for supporting the vehicle load generated by tracked vehicles operating on the deck.

[0018] Furthermore, the support arms include multiple groups, which are supporting structures after the tracked vehicle drives onto the flatbed for support operations. Each group of support arms includes a second support rod, a second hydraulic cylinder, an upper hinge, a middle hinge, and a lower hinge. The upper hinge is connected to the top of the flatbed, the middle hinge is used to connect the support rod and the cylinder support rod, and the lower hinge is fixed to the connection between the additional platform and the front transverse bulkhead to ensure support strength. When the support arms are pushed into place, the support rod is in a vertical state and is used to support the vehicle load. Therefore, an I-beam structure is also adopted. The cylinder support rod is used to control the movement of the support rod on the one hand, and to assist the support rod in supporting the vehicle load during the support rod recovery process on the other hand.

[0019] Furthermore, the additional platform, located below the upper platform of the loading bay, primarily provides a working platform for connecting the arms. Multiple pit tracks are installed on the additional platform to position the support arms, facilitating their movement and preventing them from bending laterally, which could damage them. Rubber stoppers are installed at the front of the pit tracks to limit the movement of the support rods and prevent structural damage caused by the steel-on-steel contact between the support arms and the pit tracks.

[0020] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0021] By adopting the above-mentioned technical solution, the present invention meets the requirements for connecting loading bay platforms of different heights. The provision of a flap covers the angle formed between the lower platform of the loading bay and the ramp body, eliminating the impact load of vehicles on the ramp body. The provision of a deck that slides along the slide rails and a propped-up passage platform increases the contact area of the wheel tracks when tracked vehicles pass through, and eliminates the gravity impact load generated by tracked vehicles when going up and down the slope. This improves work safety and reduces the risk of structural damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a side view of the ramp device of the present invention when the panels are turned over and laid flat;

[0023] Figure 2 This is a side view of the ramp device of the present invention with the flap and deck propped up;

[0024] Figure 3 This is an overall top view of the ramp device of the present invention;

[0025] Figure 4 A top view of the ramp main body structure in the ramp device of the present invention;

[0026] Figure 5 A top view of a flap in a ramp device according to the present invention;

[0027] Figure 6 A top view of a deck in a ramp device according to the present invention;

[0028] Figure 7 A top view of a flat plate in the ramp device of the present invention;

[0029] Figure 8 Schematic diagram of the oil cylinder connecting rod in the ramp device of the present invention;

[0030] Figure 9 Schematic diagram of the side rails of the ramp device of the present invention

[0031] Figure 10 An enlarged view of the side rails of the ramp device of the present invention;

[0032] Figure 11 Schematic diagram of the support rods in the ramp device of the present invention;

[0033] Figure 12 Schematic diagram of the oil cylinder support rod in the ramp device of the present invention;

[0034] Figure 13 Schematic diagram of the support arm of the ramp device of the present invention;

[0035] Figure 14 A diagram of an additional platform in the ramp device of the present invention;

[0036] Figure 15 A diagram of a platform pit track added to the ramp device of the present invention;

[0037] Figure 16 Schematic diagram of the I-beam support structure in the ramp device of the present invention. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0039] Example 1

[0040] like Figure 1 、 2As shown, the present invention provides a ramp device for a vehicle loading bay, which allows for the safe passage of vehicles with different wheel tracks. The ramp device includes a ramp body 1 and an additional platform 10. The lower portion of the ramp body 1 forms a support bay. The lower end of the ramp body 1 is welded to the lower platform of the loading bay, and the upper end of the ramp body 1 is welded to the upper platform of the loading bay. The two sides of the ramp body 1 are welded to the longitudinal bulkheads of the loading bay. The ends of the additional platform 10 are respectively welded to the rear end of the ramp 1 and the bulkheads at the front of the loading bay. The ramp body 1, the additional platform 10, and the various platforms and bulkheads of the loading bay form a fixed local structure.

[0041] Hydraulic cylinder connecting rods 7 are hinged on both sides of the lower end of the ramp body 1. A flap 2 is hinged to the hydraulic cylinder connecting rod 7 at the connection between the ramp body 1 and the lower platform of the loading bay to facilitate vehicle passage. The flap 2 is hinged to the hydraulic cylinder connecting rod 7. A deck 3 and a flat plate 8 are provided between the ramp body 1 and the upper platform of the loading bay. Multiple struts 5 and hydraulic struts 6 are installed within the lower support compartment of the ramp body 1. The struts 5 and the hydraulic struts 6 are hingedly connected. The struts 5 are hinged at both ends to the deck 3 and the lower platform of the loading bay. The deck 3 is connected to the upper portion of the lower support bulkhead of the ramp body 1 via the struts 5, and all connections are hinged. Slide rails 4 are welded to the longitudinal bulkhead of the loading bay, and the deck 3 is embedded in these rails on both sides. Multiple connecting arms 9 are provided between the flat plate 8 and the additional platform 10. One end of the connecting arm 9 is hinged to the flat plate 8, and the other end is hinged to the connection between the platform 10 and the front bulkhead of the loading bay.

[0042] Figure 1 In the figure, the flap 2, the deck 3 and the flat plate 8 are all in their original positions. At this time, when various types of vehicles go uphill, they will no longer bring strong impact loads to the ramp body 1 due to the transition of the flap 2. The existence of the flap 2 also makes the wheel print area of the tracked vehicle larger, which will not bring too high local pressure and facilitate the transportation of vehicles.

[0043] like Figure 1 As shown in Figures 1 and 4, the structure of the ramp body 1 includes a ramp plate 101 and a supporting structure 104 at the bottom of the ramp body. The ramp plate 101 is provided with a relatively dense plurality of wave-breaking holes 102 to ensure the safety of the ramp device in a water environment. A dense plurality of first anti-slip strips 103 are welded on the upper part of the ramp plate 101 to facilitate the vehicle to crawl on the slope. A first hinge 105 is provided on both sides of the top of the ramp body 1 for connecting with the flat plate 8, and a second hinge 107 is provided on both sides of the bottom for connecting with the flap 2. A first hinge eye plate 106 is provided on both sides of the lower end of the ramp body 1 for hinged connection with the hydraulic cylinder connecting rod 7.

[0044] like Figure 1 、 2As shown in Figures 5 and 6, the flap 2 is curved to withstand various vehicle loads. Second hinge eyelets 201 are located on both sides of the flap 2, connecting to the hydraulic cylinder connecting rod 7. Specifically, one end of the hydraulic cylinder connecting rod 7 is connected to the second hinge 107, while the other end is connected to the second hinge eyelet 201. A first eyelet 203 is located on both sides of the front end of the flap 2, connecting to the second hinge 107 reserved in the ramp body 1. A second anti-slip strip 202 of the same specifications as the first anti-slip strip 103 is located on the upper portion of the flap 2.

[0045] like Figure 1 、 2 As shown in Figures 6 and 7, the deck 3 also has an arc-shaped structure. Since the deck 3 needs to bear the heavy load of tracked vehicles, eight sets of third hinge eye plates 301 are welded to the back of the deck 3 for connection with the struts 5. The upper portion of the deck 3 is provided with a third anti-slip strip 302 of the same specifications as the first anti-slip strip 103. Circular ear plates 303 are provided at both ends of the deck 3 for embedding into the slide rails 4. Since the struts 5 are relatively long and the deck 3 is suspended for a period of time during the sliding process, in order to prevent the struts 5 from tilting when bearing the load of tracked vehicles, which would bring unnecessary shear forces to the entire support system, the ear plates 303 are embedded in the slide rails 4 to restrain the deck 3 and at the same time guide the sliding of the deck 3.

[0046] like Figure 1 、 2 As shown in Figures 7 and 8, flat plate 8 is laid flat to facilitate alignment with the upper platform of the loading bay. Because flat plate 8 also needs to bear vehicle loads, eight sets of fourth hinge eyelets 801 are welded to the front and back of flat plate 8 for connection to connecting arms 9. Second eyelets 803 are located on both sides of the rear end of flat plate 8 for connection to the first hinges 105 provided on the ramp body 1. Fourth anti-slip strips 802 of the same specifications as the first anti-slip strips 103 are also provided on the surface of flat plate 8.

[0047] like Figure 1 、 2 As shown in Figure 8, there are two groups of hydraulic cylinder connecting rods 7 on the left and right, and each group consists of three parts: a first hydraulic cylinder 701, a front hinge 703, and a rear hinge 702. The hydraulic cylinder connecting rod 7 is arranged at the bottom end of the ramp body 1, the front hinge 703 is connected to the first hinge eye plate 106 of the hinge of the ramp body 1, and the rear hinge 702 is connected to the second hinge eye plate 201 of the flap. The hydraulic cylinder connecting rod 7 mainly relies on the retraction and extension of the first hydraulic cylinder 701 to control the laying and folding of the flap 2. Since this ship is an amphibious operation type roll-on / roll-off ship, when transferring displacement boats at sea, the flap 2 needs to be folded to facilitate the mooring of the boat. The first hydraulic cylinder 701 only needs to bear the deadweight load of the flap 2, so there is no need for an overly powerful hydraulic cylinder.

[0048] like Figure 1 、 2As described in Figures 9 and 10, the loading compartment bulkhead 10 is welded with a slide rail 4, which consists of an outer slide rail 401 and an inner slide rail 402. The slide rail 4 is essentially a long, curved shell plate on the loading compartment bulkhead. The slide rail 4 guides the vertical sliding of the decking 3 and restricts its left-right movement, thereby protecting the strut 5 assembly. Lubrication, such as lubricating oil, can be used between the lugs 303 of the decking 3 and the slide rail 4, depending on actual operating conditions, to reduce friction.

[0049] like Figure 1 、 2 As shown in Figures 3 and 11, there are eight groups of support rods 5, each group includes a first support rod 501, the upper end of the first support rod 501 is hinged to the upper hinge 503, and the lower end is hinged to the lower hinge 502. A fifth hinge eye plate 504 is provided in the middle of the support rod 501. The center of the arc of the slide rail 4 is the hinge axis of the hinge 502. The support rod 5 is a supporting member when the tracked vehicle drives downhill from the high-rise platform of the loading compartment to the deck 3. As the deck 3 slides down, the supporting effect of the support rod 5 will gradually decrease, and the cylinder support rod 6 will bear most of the force. However, due to the long length of the support rod 501 and considering its force-bearing mode, in order to ensure that the support rod 5 has sufficiently strong bending strength, the support rod 501 is partially set to an I-beam structure (see Figure 16 ).

[0050] like Figure 1 、 2 As shown in Figures 3 and 12, there are eight groups of cylinder struts 6 used in conjunction with the struts 5. Each group of cylinder struts 6 consists of three parts: a hydraulic cylinder 601, a bottom hinge 602, and a top hinge 603. The upper end of the hydraulic cylinder 601 is hinged to the top hinge 603, and the lower end is hinged to the bottom hinge 602. The bottom hinge 602 is connected to the eye plate at the connection between the lower platform 8 and the bottom bulkhead of the ramp body 1. This area has more strong components and provides stronger support. The top hinge 603 is connected to the fifth hinge eye plate 504 in the middle of the strut 5. It controls the up and down sliding of the strut 5 and is the main device for supporting the vehicle load brought by the crawler vehicle when operating on the deck 3.

[0051] like Figure 1 、 2As shown in Figure 16, there are eight groups of support arms 9 for supporting the operation of the flat plate 8. Each group of support arms 9 is divided into five parts: a second support rod 901, a second hydraulic cylinder 902, an upper hinge 905, a middle hinge 903 and a lower hinge 904. The upper hinge 905 is connected to the lower chain eye 904 of the flat plate 8, and the support arm 12 can be connected to the flat plate 8. The second support rod 901 is connected to the second hydraulic cylinder 902 through the middle hinge 903. The end of the second hydraulic cylinder 902 is provided with a lower hinge 904, and the lower hinge 904 is welded to the connection between the additional platform 10 and the front bulkhead of the loading compartment to ensure the support strength. When the support arm 9 is pushed into place, the second support rod 901 is in a vertical state, used to support the vehicle load, and therefore an I-beam structure is also adopted (see Figure 16 ), the second hydraulic cylinder 902 is used to control the movement of the second support rod 901 on the one hand, and to assist the support rod 901 in supporting the vehicle load during the recovery process of the second support rod 901 on the other hand.

[0052] like Figure 1 、 2 As shown in Figures 14 and 15, the additional platform 10 is primarily provided to assist the connecting arm 9. Eight pit rails 1001 are provided on the additional platform 10 for positioning the support arm 9, facilitating its movement and preventing it from bending laterally and potentially damaging. Rubber stoppers 1002 are provided at the front ends of the pit rails 1001 to limit their movement.

[0053] Working mechanism:

[0054] like Figure 1 、 3 As shown, when a ro-ro ship is maneuvering vehicles, flap 2, decking 3, and flat plate 8 are all laid flat. Flap 2 covers the angle between the lower platform of the loading bay and ramp 1, allowing wheeled vehicles to move unimpeded from the lower platform to the upper platform, while minimizing impact damage to ramp 1. The same applies to tracked vehicles ascending the lower platform of the loading bay. The presence of flap 2 increases the tracked vehicle's wheel footprint, eliminating localized high pressure.

[0055] like Figure 1-3 As shown in Figures 1 and 13, when the tracked vehicle is about to drive from the ramp body 1 onto the upper platform of the loading bay, the second hydraulic cylinder 902 of the support arm 9 pushes the second support rod 901 forward, making the second support rod 901 vertical, thereby supporting the flatbed 8. The tracked vehicle can continue to travel along the current path. When most of the weight acts on the flatbed 8 or when the weight acts completely on the flatbed 8, the second hydraulic cylinder 902 can slowly retract the second support rod 901, returning the flatbed 8 and the tracked vehicle to a horizontal state. The tracked vehicle can then start again and travel safely, avoiding the crawler vehicle being hit by gravity.

[0056] like Figure 1-2 As shown in Figure 11, when the tracked vehicle drives into the ramp body 1 from the upper platform of the loading compartment, the front end of the tracked vehicle will first drive onto the deck 3. At this time, relying on the power of the tracked vehicle, the action of gravity and the pulling effect of the hydraulic strut 6, the strut 5 and the deck 3 are slowly lowered along the slide rail 4 with the tracked vehicle. When the deck 3 is completely dropped onto the ramp body 1, the tracked vehicle can pass safely, avoiding the gravity impact load.

[0057] like Figure 2 、 4 As shown in Figures 5 and 8, when the lower platform of the loading compartment needs to park vehicles or other equipment, the deck 2 can be pulled up by the hydraulic cylinder connecting rod 7 to facilitate the parking of vehicles or equipment.

Claims

1. A ramp device for a vehicle loading compartment for safe passage of vehicles with different wheel tracks, comprising a ramp body (1), characterized in that: The utility model further comprises an additional platform (10), wherein the lower end of the ramp body (1) is fixedly connected to the lower platform of the loading cabin, the upper end of the ramp body (1) is fixedly connected to the upper platform of the loading cabin, and both sides of the ramp body (1) are fixedly connected to the longitudinal bulkhead of the loading cabin; the front and rear ends of the additional platform (10) are respectively fixedly connected to the rear end of the ramp body (1) and the front bulkhead of the loading cabin, and a flap (2) is provided at the connection between the ramp body (1) and the lower platform of the loading cabin to reduce the impact of vehicles on the ramp body (1). ), a deck (3) and a flat plate (8) are provided on the upper part between the ramp body (1) and the upper platform of the loading cabin to reduce the gravity impact of vehicles on the ramp body (1) and the upper platform of the loading cabin, and a plurality of struts (5) and a plurality of hydraulic struts (6) are provided in the lower support cabin of the ramp body (1), the middle part of the strut (5) is movably connected to the hydraulic strut (6), the two ends of the strut (5) are movably connected to the deck (3) and the lower platform of the loading cabin respectively, and the other end of the hydraulic strut (6) is movably connected to the lower platform of the loading cabin.

2. The ramp device according to claim 1, characterized in that Both sides of the lower end of the ramp body (1) are movably connected to hydraulic cylinder connecting rods (7), and the hydraulic cylinder connecting rods (7) are movably connected to the flap (2).

3. The ramp device according to claim 1, characterized in that: A slide rail (4) is fixedly provided on the longitudinal bulkhead of the loading cabin, and both sides of the decking (3) are embedded in the slide rail (4).

4. The ramp device according to claim 1, characterized in that A plurality of connecting arms (9) are provided between the flat plate (8) and the additional platform (10), one end of the connecting arm (9) being movably connected to the flat plate (8), and the other end being movably connected to the connection between the additional platform (10) and the front bulkhead of the loading compartment.

5. The ramp device according to claim 1, characterized in that: The ramp body (1) comprises a ramp plate (101) and a supporting structure (104) at the bottom of the ramp body (1). The ramp plate (101) is provided with a plurality of relatively dense wave-breaking holes (102), so as to ensure the safety of the ramp device in a water environment.

6. The ramp device according to claim 3, characterized in that A third hinge eye plate (301) is fixedly provided on the back of the decking board (3), and the third hinge eye plate (301) is connected to the support rod (5). Circular ear plates (303) are provided at both ends of the decking board (3), and the circular ear plates (303) are embedded in the slide rail (4).

7. The ramp device according to claim 4, characterized in that A fourth hinge eye plate (801) is fixedly provided on the back of the front end of the flat plate (8), and the fourth hinge eye plate (801) is connected to the connecting arm (9). Second eye plates (803) are provided on both sides of the rear end of the flat plate (8), and the second eye plates (803) are connected to the ramp body (1).

8. The ramp device according to any one of claims 1 to 7, characterized in that: The flap (2) and the deck (3) are both arc-shaped structures. The ramp body (1), the flap (2), the deck (3) and the upper portion of the flat plate (8) are all provided with anti-slip strips. Both sides of the top of the ramp body (1) are provided with first hinges (105) for movably connecting with the flat plate (8). Both sides of the bottom of the ramp body (1) are provided with second hinges (107) for connecting with the flap (2).

9. The ramp device according to claim 8, characterized in that The flap (2) is provided with a second hinge eye plate (201) on both sides, and the second hinge eye plate (201) is movably connected to the hydraulic cylinder connecting rod (7); the flap (2) is provided with a first eye plate (203) on both sides of the front end, and the first eye plate (203) is connected to the second hinge (107) through.

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