A folding ramp device

Abstract

The application relates to a folding type of ramp device, which comprises a main ramp 1, an auxiliary ramp 2, a main ramp hydraulic cylinder 5, an auxiliary ramp hydraulic cylinder 7, a universal joint 8, a folding mechanism driving rod 10, a folding mechanism connecting rod 11, a rotary carrying platform 12 and a pin shaft. The folding type of ramp device is compact in structure, small in occupied space, can be completely folded and can bear a large load.

Description

TECHNICAL FIELD

[0001] The present application relates to a foldable ramp device applied to a transport carrying platform. BACKGROUND

[0002] The ramp commonly used in auxiliary vehicle loading operation is also called as a ladder or a jump plate. At present, the ramp mechanism is commonly used in the following situations: an auxiliary ramp for a car carrier to assist the large amount of carrying work of the car; a ramp ladder device for a low flatbed truck to assist the carrying of some engineering equipment; a jump plate device for a low flatbed truck to assist the small carrying operation; a foldable ramp for a railway flat car to realize the carrying task of the engineering vehicle during the railway construction and repair; a platform for a railway carrying flat car to realize the large amount of carrying operation of the tank troops.

[0003] In order to save space and be portable, the foldable ramp becomes a research and application hotspot in the field. However, the foldable ramp in the prior art has many deficiencies, such as the complex mechanical structure required to realize the folding action, or the occupation of the upper space of the flat car when folded, which reduces the carrying capacity of the carrying flat car, or the specific ramp platform required to realize the loading task. In addition, the carrying capacity is also a difficulty in the application of the foldable ramp. Therefore, a long ramp capable of realizing complete folding, occupying small space, not affecting the carrying of other goods when folding, and bearing large load is required to solve the above technical problems. SUMMARY

[0004] The present application aims to provide a transport carrying platform ramp device with high automation and capable of realizing complete folding.

[0005] A foldable ramp device, comprising a main ramp 1 and an auxiliary ramp 2, characterized in that: a four-bar mechanism composed of a folding mechanism driving rod 10, a folding mechanism connecting rod 11, the main ramp 1 and the auxiliary ramp 2, the four-bar mechanism being driven by an auxiliary ramp hydraulic cylinder 7; one end of the main ramp 1 is hingedly connected to a rotary carrying platform 12 through a B-type pin shaft, the rotary carrying platform 12 is installed on a transport vehicle and can rotate 90°; the other end of the main ramp 1 is hingedly connected to the auxiliary ramp 2 through a pin shaft II 4; a main ramp hydraulic cylinder 5 and the auxiliary ramp hydraulic cylinder 7 are arranged below the main ramp 1; one end of the main ramp hydraulic cylinder 5 is fixed to the rotary carrying platform 12 through a pin shaft I 3, and the piston rod ends thereof are hingedly connected to the middle part of the main ramp 1 through a pin shaft III 6; one end of the auxiliary ramp hydraulic cylinder 7 is also hingedly connected to the main ramp 1 through the pin shaft III 6, and the piston rod end thereof is connected with a universal joint 8 and connected with the folding mechanism driving rod 10 and the folding mechanism connecting rod 11 at the same point through a pin shaft IV 9 and an open pin; the other end of the folding mechanism driving rod 10 and the folding mechanism connecting rod 11 is respectively hingedly connected to the middle part of the main ramp 1 and the auxiliary ramp 2 through the pin shaft III 6.

[0006] Further, the main and auxiliary transition plates 1 and 2 adopt a fence structure, which is a rectangular square steel transversely and vertically staggered welding.

[0007] Further, the horizontal square steels of the fence structure are more dense in the middle part of the main and auxiliary transition plates 1 and 2 and are sparse at both ends.

[0008] Further, a cover plate with a smooth surface is arranged above the fence.

[0009] Further, in the four-bar mechanism composed of the folding mechanism driving rod 10, the folding mechanism connecting rod 11, the main transition plate 1 and the auxiliary transition plate 2, the length of the folding mechanism driving rod 10 is a, the length of the folding mechanism connecting rod 11 is b, the vertical distance of the folding mechanism connecting rod 11 from the pin shaft II 4 at the hinge point on the auxiliary transition plate 2 is c, the vertical distance of the folding mechanism driving rod 10 from the pin shaft II 4 at the hinge point on the main transition plate 1 is d, and a+d=b+c.

[0010] The four-bar mechanism can also be deformed into a right-angled triangle structure.

[0011] The folding transition plate device comprises a main transition plate 1 and an auxiliary transition plate 2, characterized in that it comprises a four-bar mechanism composed of a triangular connecting rod 15, the main transition plate 1 and the auxiliary transition plate 2, and the four-bar mechanism is driven by an auxiliary transition plate hydraulic cylinder 7; one end of the main transition plate 1 is hingedly connected to a rotary carrying platform 12 through a B-type pin shaft, the rotary carrying platform 12 is installed on a transport vehicle and can rotate by 90°; the other end of the main transition plate 1 is provided with a sliding block rail 16 and is hingedly connected to the auxiliary transition plate 2 through a pin shaft II 4; a main transition plate hydraulic cylinder 5 and an auxiliary transition plate hydraulic cylinder 7 are arranged below the main transition plate 1; one end of the main transition plate hydraulic cylinder 5 is fixed to the rotary carrying platform 12 through a pin shaft I 3, and the piston rod ends thereof are hingedly connected to the middle part of the main transition plate 1 through a pin shaft III 6; one end of the auxiliary transition plate hydraulic cylinder 7 is also hingedly connected to the main transition plate 1 through the pin shaft III 6, and the piston rod end thereof is hingedly connected to one end of the triangular connecting rod 15; the right-angled end of the triangular connecting rod 15 is hingedly connected to a sliding block 17 through a pin shaft, the sliding block 17 can be embedded in the sliding block rail 16 and freely slide; the triangular connecting rod 15 is fixed to the auxiliary transition plate 2 through a connecting rod hinge point 18.

[0012] Further, the length ratio of the long right-angle side to the short right-angle side of the triangular connecting rod 15 is 4:1-6:1, and the top angle of the triangle at the connecting rod hinge point 18 is 25-30°.

[0013] Further, the sliding block rail 16 and the auxiliary transition plate 2 are hingedly connected to the pin shaft II 4 through a pair of folding hinges I 19 and II 20 used in cooperation.

[0014] Further, the pin shaft I 3, the pin shaft II 4, the pin shaft III 6 and the pin shaft IV 9 are all B-type pin shafts.

[0015] The auxiliary transition plate is folded downward, which can avoid the influence of the folding mechanism on the surface and side of the transition plate, so that the phenomenon of over-width does not occur during loading and transportation. However, the downward folding has the problem of placement of the folding mechanism and the contradiction of folding angle. In order to achieve a folding angle of 0°, the folding mechanism needs to be placed on the side of the transition plate, which may interfere with other objects during railway transportation. The technical solution of the present application is an improvement for the above technical problems, that is, the folding mechanism is placed below the transition plate, and the folding angle of the transition plate is minimized through one-time downward folding of the four-bar mechanism, so that complete folding is realized.

[0016] The present application adopts a lower support, which is compact in structure and does not occupy the space of the carrying platform of the transportation vehicle, so that the utilization of space structure is maximized.

[0017] The transition plate of the present application adopts a special fence type structure, and the position and form of the ribs of the transition plate are optimized and designed, so that the lightweight of the whole transition plate is realized. The fence type structure of the transition plate can be welded by Q450 rectangular steel with a size of 90x90, and the flat cover plate thereon can increase the rigidity of the whole transition plate and reduce the deformation. Therefore, the transition plate can bear greater force with less material and lighter weight, and the whole transition plate can bear greater load with less deformation. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a bottom view of the folding transition plate device of the embodiment 1 of the present application.

[0019] Figure 2 It is a folding state diagram of the device installed on the railway flat car of the present application.

[0020] Figure 3 It is a working state diagram of the device installed on the railway flat car of the present application.

[0021] Figure 4 It is a bottom view of two groups of the folding transition plate device of the embodiment 1 of the present application.

[0022] Figure 5 It is a structure schematic diagram of the folding transition plate device of the embodiment 2 of the present application.

[0023] Figure 6 It is a bottom view of the folding transition plate device of the embodiment 2 of the present application.

[0024] Figure 7 It is a structure schematic diagram of two groups of the folding transition plate device of the embodiment 2 of the present application.

[0025] Figure 8 It is a bottom view of two groups of the folding transition plate device of the embodiment 2 of the present application.

[0026] Figure 9 This is a schematic diagram of the folding mechanism described in this invention. Detailed Implementation

[0027] The invention will be further described with reference to the accompanying drawings:

[0028] In the accompanying drawings of this application:

[0029] Main crossing plate 1, auxiliary crossing plate 2, pin I 3, pin II 4, main crossing plate hydraulic cylinder 5, pin III 6, auxiliary crossing plate hydraulic cylinder 7, universal coupling 8, pin IV 9, folding mechanism drive rod 10, folding mechanism connecting rod 11, return transfer platform 12, railway flatcar 13, railway rail 14, triangular connecting rod 15, slider track 16, slider 17, connecting rod hinge point 18, hinge I 19, hinge II 20.

[0030] Example 1

[0031] like Figure 1 As shown, one end of the main ferrule 1 is hinged to the return transport platform 12 via a type B pin and a cotter pin, and the other end is hinged to the auxiliary ferrule 2 via pin II 4. A main ferrule hydraulic cylinder 5 and an auxiliary ferrule hydraulic cylinder 7 are located below the main ferrule 1. The piston rod ends of both the auxiliary ferrule hydraulic cylinder 7 and the main ferrule hydraulic cylinder 5 are hinged to the middle of the main ferrule 1 via pin III 6. The other end of the main ferrule hydraulic cylinder 5 is fixed to the return transport platform 12 via pin I 3, used to control the deflection angle of the main ferrule 1; the piston rod end of the auxiliary ferrule hydraulic cylinder 7 is connected to the universal coupling 8 and intersects with the folding mechanism drive rod 10 and the folding mechanism connecting rod 11 at the same point via pin IV 9 and its cotter pin. The other ends of the folding mechanism drive rod 10 and the folding mechanism connecting rod 11 are respectively hinged to the middle of the main ferrule 1 and the auxiliary ferrule 2 via pin III 6.

[0032] like Figure 2 As shown, a return transport platform 12 and the folding ramp device described in this application are installed on a flatcar 13 of the railway. In the non-working state, the auxiliary ramp 2 is folded completely parallel to the main ramp 1 below. In the working state, the return transport platform 12 first rotates 90 degrees, perpendicular to the extension direction of the rail 14. Then, the auxiliary ramp hydraulic cylinder 7 pushes the folding mechanism's active rod 10, causing it to rotate around the hinge point of pin IV 9, while simultaneously driving the folding mechanism's connecting rod 11. Driven by the folding mechanism's connecting rod 11, the auxiliary ramp 2 gradually extends around pin II 4 until it connects with the main ramp 1 in a straight line. At this time, the plane containing the main ramp 1 and the auxiliary ramp 2 is perpendicular to the extension direction of the rail 14. Pulled by the main ramp hydraulic cylinder 5, the main ramp 1 and the auxiliary ramp 2 move downwards around pin I 3, forming a line with the ground as shown in the image. Figure 3 The acute angle shown continues until the auxiliary ramp 2 touches the ground.

[0033] The folding back of the apron is the reverse process of the above-mentioned unfolding process. First, under the push of the main apron hydraulic cylinder 5, the main apron 1 and the auxiliary apron 2 gradually leave the ground until they are connected in a straight line and parallel to the ground. Then, the auxiliary apron hydraulic cylinder 7 pulls the folding mechanism driving rod 10, which drives the folding mechanism connecting rod 11 and the auxiliary apron 2 to gradually fold towards the underside of the main apron 1 until they are completely hidden under the main apron 1 (the folding angle reaches 0°). After that, the rotating carrier platform 12 rotates 90 degrees, changing from a state perpendicular to the extension direction of the rails 14 to a state completely parallel to the extension direction of the rails 14.

[0034] As shown in Figure 4 , according to the needs of the transport carrying vehicle, the folding apron device can be installed in 1-3 groups on the rotating carrier platform 12.

[0035] Example 2

[0036] As shown in Figure 5 , the folding apron device, the main apron 1 is connected to the rotating carrier platform 12 in the same way as in Example 1. The other end of the main apron 1 is provided with a sliding block track 16, and the auxiliary apron 2 is hinged to the pin shaft II 4 through the hinge I 19 and the hinge II 20, which are a pair of matched hinges. The piston rod end of the auxiliary apron hydraulic cylinder 7 is hinged to one end of the triangular connecting rod 15 through the pin shaft IV 9 and its split pin. The triangular connecting rod 15 is a right triangle as shown in Figure 5 , the length ratio of the long leg to the short leg is 4:6, and the top angle at the connecting rod hinge point 18 is 30°. The right angle end of the triangular connecting rod 15 is hinged to the sliding block 17 through the pin shaft, and the sliding block 17 can be embedded in the sliding block track 16 and slide freely. The triangular connecting rod 15 is fixed to the auxiliary apron 2 through the connecting rod hinge point 18.

[0037] In the working state, the rotating carrier platform 12 first rotates 90 degrees, perpendicular to the extension direction of the rails 14. Then, the auxiliary apron hydraulic cylinder 7 pushes the triangular connecting rod 15 and the sliding block 17 on it to slide in the sliding block track 16, while the top angle end of the triangular connecting rod 15 (i.e. the connecting rod hinge point 18) also pushes the auxiliary apron 2 out until it is connected to the main apron 1 as a whole and in the same plane. At this time, the plane where the main apron 1 and the auxiliary apron 2 are located is perpendicular to the extension direction of the rails 14. Under the pull of the main apron hydraulic cylinder 5, the main apron 1 and the auxiliary apron 2 move downward around the pin shaft I 3, forming a slope with the ground as shown in Figure 7 , until the auxiliary apron 2 contacts the ground.

[0038] According to the needs of the transport carrying vehicle, the above-mentioned folding apron device can be installed in 2 groups on the rotating carrier platform 12 in the installation mode as shown in Figures 7-8 .

[0039] The above is a specific example of the present application, which more fully and completely illustrates the present application's concept. Any modification, supplement or replacement of the described specific example with similar methods, as long as it does not deviate from the present application or exceed the scope defined by the claims, belongs to the protection scope of the present application.

Claims

1. A folding ramp arrangement comprising a main ramp (1), a secondary ramp (2), characterised in that: The four-bar mechanism is composed of a triangular connecting rod (15), a main crossbar (1) and an auxiliary crossbar (2), and is driven by an auxiliary crossbar hydraulic cylinder (7); one end of the main crossbar (1) is hingedly connected to a rotary carrying platform (12) through a B-type pin shaft, the rotary carrying platform (12) is installed on a transport vehicle and can rotate 90°; the other end of the main crossbar (1) is provided with a sliding block rail (16) and is hingedly connected to the auxiliary crossbar (2) through a pin shaft II (4); the main crossbar (1) is provided below with the main crossbar hydraulic cylinder (5) and the auxiliary crossbar hydraulic cylinder (7); one end of the main crossbar hydraulic cylinder (5) is fixed to the rotary carrying platform (12) through a pin shaft I (3), and the piston rod ends thereof are hingedly connected to the middle part of the main crossbar (1) through a pin shaft III (6); one end of the auxiliary crossbar hydraulic cylinder (7) is also hingedly connected to the main crossbar (1) through the pin shaft III (6), and the piston rod end thereof is hingedly connected to one end of the triangular connecting rod (15); the right-angle end of the triangular connecting rod (15) is hingedly connected to a sliding block (17) through a pin shaft, the sliding block (17) can be embedded in the sliding block rail (16) and freely slide; the triangular connecting rod (15) is fixed to the auxiliary crossbar (2) through a connecting rod hinging point (18).

2. A folding ramp assembly as claimed in claim 1, wherein: The length ratio of the long right-angle side to the short right-angle side of the triangular connecting rod (15) is 4:6, and the top angle of the triangle at the connecting rod hinging point (18) is 25-30°.

3. A folding boarding arrangement as claimed in claim 1 or 2, characterised in that: The sliding block rail (16) and the auxiliary crossbar (2) are hingedly connected to the pin shaft II (4) through a pair of folding hinges I (19) and II (20) used in cooperation.

4. A folding ramp assembly as claimed in claim 3, wherein: The pin shaft I (3), the pin shaft II (4), the pin shaft III (6) and the pin shaft IV (9) are all B-type pin shafts.

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