A two-stage folding bridge device

Abstract

The present invention relates to a two-stage folding ferry device, which comprises a hydraulic winch 1, a ferry 2, a gear 5, a cam 9, a rack 10, a gear shaft 13, a lower ferry 14, a thrust hydraulic cylinder 11, a wire lock 16 and a hydraulic cylinder 17. The folding ferry device of the present invention realizes the complete folding, overlapping and unfolding of the upper and lower ferry through the hydraulic winch 1 and its wire lock 16, the gear 5 and the rack 10. It has a compact structure, occupies a small space, and can withstand a large load.

Description

Technical Field

[0001] The invention relates to a two-section folding bridge device applied to a transport bearing platform. Background Art

[0002] The commonly used ferry board in auxiliary vehicle loading operations is also called a ladder or a springboard. In order to save space and be portable, foldable ferry boards have become a hot spot for research and application in this field. However, there are many shortcomings in the foldable ferry boards in the prior art. For example, a complex mechanical structure is required to achieve the folding action, or when folded up, it will occupy the upper space of the flat car, reducing the transportation volume of the flat car, or a specific slope platform is required to achieve the loading task. In addition, the carrying capacity is also a difficulty that restricts the application of foldable ferry boards. When heavy defense vehicles such as tanks, armored vehicles, and communication vehicles are loaded and unloaded on the railway transport bearing platform, the requirements for safety and efficiency are extremely high. However, the main method currently used is still to build temporary ferry boards with hand-held sleepers or to use railway cranes for loading and unloading. This not only requires a large amount of labor, but also has a large workload, low efficiency, and long operation time; or it requires the cooperation of a large-tonnage crane, occupies large equipment, and is time-consuming and labor-intensive for batch transportation.

[0003] Therefore, a long ferry that can be completely folded, occupies a small space, does not affect the transportation of other goods when folded and scaled, and can withstand a large load is needed to solve the above technical problems. Summary of the invention

[0004] The present invention aims to provide a ferry device which can bear a relatively large load and can be completely folded.

[0005] A two-stage folding ferry device includes a mounting base 4, two upper ferry plates 2, two lower ferry plates 14, a thrust hydraulic cylinder 11, a hinge 15 and a hydraulic cylinder 17, and is characterized in that the lower ferry plate 14 is completely folded, overlapped and unfolded with the upper ferry plate 2 through a hydraulic winch 1 and a wire lock 16 fixed to the mounting base 4, a rack 10 fixedly connected to the thrust hydraulic cylinder 11, and a gear 5 meshing with the rack 10.

[0006] Furthermore, the two-stage folding ferry device also includes a fixed pin shaft 6, a cam 9 and a gear shaft 13. The thrust hydraulic cylinder 11 is located in the middle of the two upper ferry plates 2, one end of which is connected to the fixed pin shaft 6, and one end of its hydraulic rod is fixedly connected to the rack 10. The gear 5 is installed on the gear shaft 13. The cam 9 is an arc-shaped structure with a through hole at one end, which passes through the gear shaft 13 and is fixed by welding.

[0007] Furthermore, the two-stage folding ferry device further comprises a baffle 12. The baffle 12 is fixedly connected with the lower ferry 14 on both sides to form a rigid body, and the whole is in a "concave" shape.

[0008] Furthermore, the wire lock 16 of the hydraulic winch 1 is connected to the outer edge of the lower end of the lower ferry 14 .

[0009] Furthermore, the two-stage folding ferry device further comprises a protective elbow 7 and a positioning pin 8. One end of the protective elbow 7 is fixed to the lower end of the upper ferry 2, and the other end thereof can be connected and fixed to the lower ferry 14 through the positioning pin 8 and a bolt.

[0010] Furthermore, the thickness of the baffle 12 is smaller than that of the lower ferry 14 to ensure that the connection and fixation between the protective elbow 7 and the lower ferry 14 is not hindered.

[0011] Furthermore, the number of the protective elbows 7 can be 2-6.

[0012] Furthermore, the upper ferry board 2 and the lower ferry board 14 are formed by welding a number of I-beams side by side or by laying steel plates on a steel frame, and the upper surfaces thereof are provided with anti-skid ribs or anti-skid convex patterns.

[0013] The two-stage folding ferry device described in the present application can carry heavy vehicles of more than 50 tons, especially tracked heavy vehicles, such as tanks, etc. It has a simple structure, and the upper and lower ferry boards do not affect the loading space of the transport bearing platform after they are completely folded and overlapped, and the unfolding and folding process is efficient, safe and reliable.

[0014] The cam 9 cooperates with the gear 5 and the rack 10, and while it plays the role of lifting the baffle 12, it can also ensure that the lower ferry 14 can be reset at any time after it is unfolded, avoiding interference when heavy vehicles pass through the transition plate. If a common hydraulic cylinder in the field is used at the same position to drive the folding and unfolding of the upper and lower ferry boards, one end of the hydraulic rod of the hydraulic cylinder needs to be hinged with the baffle 12. After the lower ferry 14 is fully unfolded, the hydraulic cylinder cannot be retracted, which may interfere with heavy vehicles passing through the transition plate; when the lower ferry 14 is folded, because the upper and lower ferry boards are located on the same straight line, the pulling direction of the hydraulic cylinder is in line with the upper and lower ferry boards, so it is difficult to form an effective component force and fold the lower ferry board. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of the two-section folding ferry device described in the present invention.

[0016] Figure 2 It is a left view of the two-section folding ferry device described in the present invention.

[0017] Figure 3 This is a top view of the two-section folding ferry device described in the present invention.

[0018] Figure 4 for Figure 2 A partial enlarged view of .

[0019] Figure 5It is a schematic structural diagram of the cam 9 of the present invention. DETAILED DESCRIPTION

[0020] The present invention is further described with reference to the accompanying drawings:

[0021] In the drawings of this application:

[0022] Hydraulic winch 1, upper ferry 2, shaft 3, mounting seat 4, gear 5, fixed pin 6, protective elbow 7, positioning pin 8, cam 9, rack 10, thrust hydraulic cylinder 11, baffle 12, gear shaft 13, lower ferry 14, hinge 15, wire lock 16, hydraulic cylinder 17.

[0023] Example 1

[0024] like Figure 1-3 As shown, the hydraulic winch 1 is fixed to the upper surface of the mounting seat 4. One end of the upper ferry 2 is hinged to the mounting seat 4 through the rotating shaft 3, and the other end is connected to the lower ferry 14 through the hinge 15. One end of the hydraulic cylinder 17 is hinged to the mounting seat 4 through the rotating shaft 3, and one end of its hydraulic rod is hinged to the upper ferry 2. The thrust hydraulic cylinder 11 is located in the middle of the two upper ferry plates 2, one end of which is connected to the fixed pin 6, and one end of its hydraulic rod is fixedly connected to the rack 10. The gear 5 is installed on the gear shaft 13, and the gear 5 and the rack 10 are meshed with each other. The cam 9 is an arc-shaped structure with a through hole at one end, which is fixed by passing through the gear shaft 13 and welding. The baffle 12 is fixedly connected to the lower ferry 14 on both sides to form a rigid body, and the whole is in a "concave" shape. The wire lock 16 of the hydraulic winch 1 is connected to the outer edge of the lower end of the lower ferry 14. One end of the protective elbow 7 is fixed to the lower end of the upper ferry 2.

[0025] In the initial folding state of the folding ferry described in the present application, the upper ferry 2 and the lower ferry 14 are completely folded and overlapped and perpendicular to the transport bearing platform and the ground. In the working state, when the folded ferry needs to be unfolded, the hydraulic cylinder 17 contracts and pulls the upper ferry 2 and the lower ferry 14 to gradually tilt toward the ground until they form an angle of about 30° with the ground. Then the thrust hydraulic cylinder 11 contracts and pulls the rack 10 to move, and further drives the gear 5 meshing with the rack 10 to rotate. The rotation of the gear 5 drives the cam 9 to rotate and lift the baffle 12, and the lower ferry 14 then turns outward around the gear shaft 13 and unfolds. When the angle between the upper ferry 2 and the lower ferry 14 is greater than 60°, the thrust hydraulic cylinder 11 stops contracting. At this time, the wire lock 16 in the hydraulic winch 1 is loosened, so that the lower ferry 14 continues to do outward eversion movement by its own weight until its lower end touches the ground. Then the other end of the protective elbow 7 is connected and fixed to the lower ferry 14 through the positioning pin 8. Finally, the upward-warped cam 9 is retracted by adjusting the extension and contraction of the thrust hydraulic cylinder 11.

[0026] When the loading and unloading of vehicles is completed and the ferry needs to be folded, the hydraulic cylinder 17 drives the unfolded upper and lower ferry to rotate upward by about 60 degrees, then releases the fixation of the protective elbow 7, and then pulls the lower ferry 14 inward by the wire lock 16 until it completely overlaps with the upper ferry 2. The hydraulic cylinder 17 then pushes the upper and lower ferry to form a 90-degree angle with the transport platform and the ground.

[0027] The above contents are specific examples of the present invention, which illustrate the concept of the invention in more detail. Various modifications, supplements or replacements of the specific examples described by technicians in this technical field with similar methods shall fall within the protection scope of the present invention as long as they do not deviate from the present invention or exceed the scope of the claims.

Claims

1. A two-stage folding ferry device capable of carrying a crawler heavy vehicle, comprising a mounting seat (4), two upper ferry plates (2), two lower ferry plates (14), a thrust hydraulic cylinder (11), a folding leaf (15) and a hydraulic cylinder (17), characterized in that: One end of the upper ferry (2) is hinged to the mounting seat (4) via a rotating shaft (3), and the other end is connected to the lower ferry (14) via a hinge (15); one end of the hydraulic cylinder (17) is hinged to the mounting seat (4) via a rotating shaft (3), and one end of its hydraulic rod is hinged to the upper ferry (2); the lower ferry (14) is completely folded, overlapped and unfolded with the upper ferry (2) through a hydraulic winch (1) and its wire lock (16) fixed to the mounting seat (4), a rack (10) fixedly connected to the thrust hydraulic cylinder (11), and a gear (5) meshing with the rack (10); the wire lock (16) of the hydraulic winch (1) is connected to the outer edge of the lower end of the lower ferry (14); the two-stage folding ferry device also includes a protective elbow (7) and a positioning pin shaft (8); the protective elbow One end of the cam (7) is fixed to the lower end of the upper ferry (2), and the other end thereof can be connected and fixed to the lower ferry (14) through a positioning pin (8) and a bolt; the two-stage folding ferry device also includes a fixed pin (6), a cam (9) and a gear shaft (13); the thrust hydraulic cylinder (11) is located in the middle of the two upper ferry plates (2), one end of which is connected to the fixed pin (6), and one end of its hydraulic rod is fixedly connected to the rack (10); the gear (5) is installed on the gear shaft (13); the cam (9) is an arc-shaped structure with a through hole at one end, which is fixed by passing through the gear shaft (13) and welding; the two-stage folding ferry device also includes a baffle (12); the baffle (12) is fixedly connected to the lower ferry (14) on both sides to form a rigid body, and the whole is in a "concave" shape; In the initial folding state, the upper ferry (2) and the lower ferry (14) are completely folded and overlapped and are perpendicular to the transport platform and the ground. In the working state, when the folded ferry needs to be unfolded, the hydraulic cylinder (17) contracts and pulls the upper ferry (2) and the lower ferry (14) to gradually tilt toward the ground until they form an angle of about 30° with the ground. Then, the thrust hydraulic cylinder (11) contracts and pulls the rack (10) to move, and further drives the gear (5) meshing with the rack (10) to rotate. The rotation of the gear (5) drives the cam (9) to rotate and lift the baffle ( 12), the lower ferry (14) then turns outward around the gear shaft (13) and unfolds; when the angle between the upper ferry (2) and the lower ferry (14) is greater than 60°, the thrust hydraulic cylinder (11) stops contracting, and at this time, the wire lock (16) in the hydraulic winch (1) is loosened, so that the lower ferry (14) continues to move outward by its own weight until its lower end touches the ground, and then the other end of the protective elbow (7) is connected and fixed to the lower ferry 14 through the positioning pin shaft (8), and finally the upward cam (9) is retracted by adjusting the extension and contraction of the thrust hydraulic cylinder (11); When the loading and unloading of the vehicle is completed and the ferry board needs to be folded, the hydraulic cylinder (17) drives the unfolded upper and lower ferry boards to rotate upward by about 60 degrees as a whole, then releases the fixation of the protective elbow (7), and pulls the lower ferry board (14) inward by the wire lock (16) until it completely overlaps with the upper ferry board (2), and then the hydraulic cylinder (17) pushes the upper and lower ferry boards as a whole to a state of 90 degrees with the transport bearing platform and the ground.

2. A two-stage folding bridge device capable of carrying a tracked heavy vehicle as claimed in claim 1, characterized in that: The thickness of the baffle plate (12) is smaller than that of the lower fender (14).

3. A two-stage folding bridge device capable of carrying a tracked heavy vehicle as claimed in claim 1 or 2, characterized in that: The number of the protective elbows (7) can be 2-6.

4. A two-stage folding bridge device capable of carrying a tracked heavy vehicle as claimed in claim 3, characterized in that: The upper ferry plate (2) and the lower ferry plate (14) are made of a plurality of I-beams welded side by side or are made of steel plates laid on a steel frame, and the upper surfaces thereof are provided with anti-skid ribs or anti-skid convex patterns.

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