Heavy-load rail liftable flat car

Abstract

The utility model provides a heavy load rail liftable flatcar which comprises a lifting platform deck, a lifting mechanism and a rail, the lifting platform deck is used for bearing heavy objects, the lifting mechanism is movably arranged on the rail, and the lifting mechanism is used for driving the lifting platform deck to do lifting motion. The lifting mechanism comprises a lifting driving assembly, a first supporting arm assembly and a second supporting arm assembly, the first supporting arm assembly and the second supporting arm assembly are arranged in the extending direction of the track in a spaced mode, and one end of the first supporting arm assembly and one end of the second supporting arm assembly are located below the lifting carrying table and rotationally connected with the lifting carrying table. The other ends of the first supporting arm assembly and the second supporting arm assembly are located above the track and are in sliding connection with the track, and the lifting driving assembly is in driving connection with the first supporting arm assembly and the second supporting arm assembly so as to drive the other ends of the first supporting arm assembly and the second supporting arm assembly to move face to face or back to back. The lifting platform deck is supported by the first supporting arm assembly and the second supporting arm assembly, and vibration conducted to the lifting driving assembly can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field especially relates to a heavy load rail liftable flat car. BACKGROUND

[0002] The flat car is mainly used for conveying steel, timber, automobile, mechanical equipment and other goods with large volume or weight. According to the use, the flat car can be divided into general flat car and container special flat car, the general flat car is mainly used for transporting large goods such as steel and timber, and the container special flat car is specially used for container transportation. The flat car has the advantages of simple structure, convenient use, easy maintenance, large carrying capacity and less pollution, and is widely used in machine manufacturing and metallurgical plants as the internal cooperation with the crane to transport heavy objects across the span. Chinese patent CN204980130U discloses a kind of flat car with liquid type lifting electric, including rack, flat car walking mechanism installed on rack, rotating platform for rotating and conveying goods, lifting goods platform for further lifting and conveying goods, rack bottom is equipped with linear guide rail, flat car walking mechanism and lifting goods platform are installed on linear guide rail, lifting goods platform includes top walkway and hydraulic cylinder located below walkway, and hydraulic cylinder is installed below walkway in multiple side by side. Walkway in the above-mentioned patent is lifted by hydraulic cylinder, hydraulic cylinder is used for lifting and supporting heavy object, and the output end of hydraulic cylinder is directly contacted with walkway, using this structure design, when heavy object is handled, certain impact vibration is generated, vibration is conducted to the output end of hydraulic cylinder, long time use can damage hydraulic cylinder, cause danger, cannot satisfy use demand. CONTENT OF UTILITY MODEL

[0003] The utility model aims at providing a kind of heavy load rail liftable flat car, can effectively reduce vibration conduction to hydraulic cylinder, to realize the danger caused by long time use is avoided, satisfy use demand.

[0004] In order to realize the above-mentioned purpose, the utility model takes the following technical scheme:

[0005] The utility model embodiment provides a kind of heavy load rail liftable flat car, including lifting platform, lifting mechanism and rail, lifting platform is used to carry heavy object, lifting mechanism is movably arranged on rail, and lifting mechanism is used to drive lifting platform to do lifting action;Lifting mechanism includes lifting drive assembly, first branch arm assembly and second branch arm assembly, first branch arm assembly and second branch arm assembly are spaced apart along the extension direction of rail, and one end of first branch arm assembly and second branch arm assembly is respectively located below lifting platform and is rotatably connected with lifting platform, and the other end of first branch arm assembly and second branch arm assembly is respectively located above rail and is slidably connected with rail, and lifting drive assembly is respectively drivingly connected with first branch arm assembly and second branch arm assembly, to drive the other end of first branch arm assembly and second branch arm assembly moves towards or away from each other.

[0006] Preferably, the track comprises two rails arranged at a distance from each other, the first arm assembly comprises a first connecting shaft and two first arms connected with each other, one end of each of the two first arms is rotatably connected with the lifting platform through the first connecting shaft, and the other end of each of the two first arms is slidably connected with the two rails; the second arm assembly comprises a second connecting shaft and two second arms connected with each other, one end of each of the two second arms is rotatably connected with the lifting platform through the second connecting shaft, and the other end of each of the two second arms is slidably connected with the two rails.

[0007] Preferably, the lifting driving assembly comprises a first telescopic driving device and two linkage assemblies, a fixed end of the first telescopic driving device is rotatably connected with the first connecting shaft, and a telescopic end of the first telescopic driving device is rotatably connected with the second connecting shaft; one linkage assembly is connected between the first arm and the second arm on the same rail; the linkage assembly comprises a first linkage and a second linkage, one end of the first linkage is hingedly connected with one end of the second linkage, the other end of the first linkage is hingedly connected with the first arm, and the other end of the second linkage is hingedly connected with the second arm.

[0008] Preferably, the lifting driving assembly further comprises a second telescopic driving device, a fixed end of the second telescopic driving device is rotatably connected with the second connecting shaft, and a telescopic end of the second telescopic driving device is rotatably connected with the first connecting shaft.

[0009] Preferably, the first linkage and the second linkage are hingedly connected through a guide pivot, the guide pivot is located below the lifting platform and is slidably connected with the lifting platform in the lifting direction of the lifting platform.

[0010] Preferably, two connecting seats are installed below the lifting platform, the two connecting seats are arranged outside the two first arms and the two second arms in the distribution direction of the two rails, opposite sides of the two connecting seats are respectively provided with guide sliding grooves, and the guide pivot is slidably connected with the guide sliding grooves.

[0011] Preferably, a first roller is connected between the first arm and the rail, and a second roller is connected between the second arm and the rail.

[0012] Preferably, the heavy-load rail-mounted liftable flatcar further comprises a walking driving device and a transmission assembly, the walking driving device is arranged on the first arm, the walking driving device is drivingly connected with the transmission assembly, and the transmission assembly is drivingly connected with the first roller to drive the first roller to rotate and move along the rail.

[0013] Preferably, the walking driving device comprises a motor, the transmission assembly comprises a transmission shaft, a first chain sprocket assembly and a second chain sprocket assembly, the transmission shaft is arranged on the first supporting arm, the first chain sprocket assembly is in transmission connection between the motor and the transmission shaft to drive the transmission shaft to rotate, and the second chain sprocket assembly is in transmission connection between the transmission shaft and the first roller to drive the first roller to rotate.

[0014] Preferably, the first telescopic driving device comprises a hydraulic cylinder, a pneumatic cylinder or an electric push rod, and the second telescopic driving device comprises a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

[0015] Compared with the prior art, the heavy-load rail-lifted flat car has the advantages that:

[0016] The heavy-load rail-lifted flat car has the advantages that: BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0018] Figure 1 The top view schematic diagram of the heavy-load rail-lifted flat car structure provided by the embodiments of the present application is shown in the figure.

[0019] Figure 2 The front view schematic diagram of the heavy-load rail-lifted flat car structure provided by the embodiments of the present application is shown in the figure.

[0020] Figure 3 The structure schematic diagram of the connecting seat provided by the embodiments of the present application is shown in the figure.

[0021] Figure 4 The structure schematic diagram of the first supporting arm and the second supporting arm provided by the embodiments of the present application is shown in the figure.

[0022] Reference signs:

[0023] 10, lifting platform; 11, guide rail; 12, first connecting shaft; 13, first supporting arm; 14, second connecting shaft; 15, second supporting arm; 16, first cross beam; 17, second cross beam; 18, first telescopic driving device; 19, first connecting rod; 20, second connecting rod; 21, guide pivot; 22, connecting seat; 23, guide sliding groove; 24, first roller; 25, second roller; 26, second telescopic driving device; 27, motor; 28, transmission shaft; 29, first double-row sprocket; 30, first double-row chain; 31, second double-row sprocket; 32, first single-row sprocket; 33, first single-row chain; 34, second single-row sprocket; 35, channel steel. DETAILED DESCRIPTION

[0024] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application can be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known methods, devices, and circuits are omitted so as not to obscure the description of the present application with unnecessary detail. Example 1

[0025] Please refer to Figures 1 to 4As shown, the heavy load rail liftable flat car provided by the embodiment of the utility model is described. The heavy load rail liftable flat car comprises a lifting platform 10, a lifting mechanism and a track, the lifting platform 10 is used for carrying heavy objects, the lifting mechanism is movably arranged on the track, and the lifting mechanism is used for driving the lifting platform 10 to perform lifting action; the lifting mechanism comprises a lifting driving assembly, a first supporting arm assembly and a second supporting arm assembly, the first supporting arm assembly and the second supporting arm assembly are arranged at intervals along the extension direction of the track, one end of the first supporting arm assembly and the second supporting arm assembly is respectively located below the lifting platform 10 and is rotationally connected with the lifting platform 10, the other end of the first supporting arm assembly and the second supporting arm assembly is respectively located above the track and is slidingly connected with the track, and the lifting driving assembly is drivingly connected with the first supporting arm assembly and the second supporting arm assembly to drive the other end of the first supporting arm assembly and the second supporting arm assembly to move towards or away from each other. It can be understood that the track is used for providing support and walking guidance for the lifting flat car, and the first supporting arm assembly and the second supporting arm assembly can move along the track. When the lifting driving assembly drives the one end of the first supporting arm assembly and the second supporting arm assembly connected with the track to move towards each other, the one end of the first supporting arm assembly and the second supporting arm assembly connected with the track is close to each other, and the lifting platform 10 rises; when the lifting driving assembly drives the one end of the first supporting arm assembly and the second supporting arm assembly connected with the track to move away from each other, the one end of the first supporting arm assembly and the second supporting arm assembly connected with the track is far away from each other, and the lifting platform 10 descends. Since the lifting driving assembly is only used for driving the lifting action of the first supporting arm assembly and the second supporting arm assembly, and the lifting platform 10 is supported by the first supporting arm assembly and the second supporting arm assembly, when heavy objects are loaded and unloaded, the vibration can be effectively reduced to the lifting driving assembly, thereby avoiding the damage of the lifting driving assembly caused by long-time use, further reducing the risk, prolonging the service life, and meeting the use requirement.

[0026] Wherein, referring to Figure 1 and Figure 2As shown, the track includes two guide rails 11 spaced apart from each other. The first support arm assembly includes a first connecting shaft 12 and two interconnected first support arms 13. One end of each of the two first support arms 13 is rotatably connected to the lifting platform 10 via the first connecting shaft 12, and the other end of each of the two first support arms 13 is slidably connected to the two guide rails 11. The second support arm assembly includes a second connecting shaft 14 and two interconnected second support arms 15. One end of each of the two second support arms 15 is rotatably connected to the lifting platform 10 via the second connecting shaft 14, and the other end of each of the two second support arms 15 is slidably connected to the two guide rails 11. Specifically, two guide rails 11 are arranged parallel to each other. A first arm 13 and a second arm 15 are located above one of the guide rails 11 and can move along the guide rail 11. The other first arm 13 and the other second arm 15 are located above the other guide rail 11 and can move along the guide rail 11. The two first arms 13 are connected by a first crossbeam 16. A first connecting shaft 12 passes through the two first arms 13 and is fixedly connected to the two first arms 13. Rotation of the first connecting shaft 12 can drive the two first arms 13 to rotate synchronously. The two second arms 15 are connected by a second crossbeam 17. A second connecting shaft 14 passes through the two second arms 15 and is fixedly connected to the two second arms 15. Rotation of the second connecting shaft 14 can drive the two second arms 15 to rotate synchronously. The rotation directions of the second arms 15 and the first arms 13 are opposite. The lifting drive assembly includes a first telescopic drive device 18 and two linkage assemblies. The fixed end of the first telescopic drive device 18 is rotatably connected to a first connecting shaft 12, and the telescopic end of the first telescopic drive device 18 is rotatably connected to a second connecting shaft 14. A linkage assembly connects a first support arm 13 and a second support arm 15 located on the same guide rail 11. The linkage assembly includes a first link 19 and a second link 20. One end of the first link 19 is hinged to one end of the second link 20, the other end of the first link 19 is hinged to the first support arm 13, and the other end of the second link 20 is hinged to the second support arm 15. Figure 4 As shown. Specifically, the first connecting shaft 12 is connected between the two ends of the first support arm 13, the second connecting shaft 14 is connected between the two ends of the second support arm 15, the first connecting rod 19 is connected to the upper end of the first support arm 13 (i.e., the end near the lifting platform 10), and the second connecting rod 20 is connected to the upper end of the second support arm 15 (i.e., the end near the lifting platform 10). The first telescopic drive device 18 includes a hydraulic cylinder, a pneumatic cylinder, or an electric push rod. The first telescopic drive device 18 drives the first connecting shaft 12 and the second connecting shaft 14 to rotate synchronously in opposite directions by outputting linear motion, thereby causing the first support arm 13 and the second support arm 15 to rotate synchronously in opposite directions and move away from or closer to each other, so as to control the lifting of the lifting platform 10. Figure 1 , Figure 3 and Figure 4As shown in the first connecting rod 19 and the second connecting rod 20 are hinged through a guide pivot 21, the guide pivot 21 is located below the lifting platform 10, and is in sliding connection with the lifting platform 10 along the lifting direction of the lifting platform 10. Through the above setting, the first connecting rod 19 and the second connecting rod 20 can be prevented from being deflected, so that the lifting platform 10 can be lifted and lowered along the vertical direction. Specifically, two connecting seats 22 are installed below the lifting platform 10, the two connecting seats 22 are arranged outside the two first arms 13 and the two second arms 15 along the distribution direction of the two guide rails 11, and the opposite sides of the two connecting seats 22 are respectively provided with guide sliding grooves 23, and the guide pivot 21 is in sliding connection with the guide sliding grooves 23, as shown in Figure 1 、 Figure 2 and Figure 3 . Wherein, the first connecting shaft 12 and the second connecting shaft 14 are both arranged between the two connecting seats 22, the first connecting shaft 12 and the second connecting shaft 14 are respectively in rotational connection with the connecting seats 22, and are arranged in parallel with each other. In addition, the first arm 13 is connected with the guide rail 11 through a first roller 24, and the second arm 15 is connected with the guide rail 11 through a second roller 25. The first roller 24 is installed below the first arm 13, and the second roller 25 is installed below the second arm 15, and the first roller 24 and the second roller 25 are respectively in sliding connection with the guide rail 11 where they are located, and the first roller 24 and the second roller 25 can facilitate the movement of the lifting platform 10 along the track. In order to further ensure that the first arm assembly and the second arm assembly rotate synchronously to make the lifting platform 10 lift stably, preferably, as shown in Figure 1 and Figure 4 , the lifting driving assembly further comprises a second telescopic driving device 26, the fixed end of the second telescopic driving device 26 is in rotational connection with the second connecting shaft 14, and the telescopic end of the second telescopic driving device 26 is in rotational connection with the first connecting shaft 12. The second telescopic driving device 26 comprises a hydraulic cylinder, an air cylinder or an electric push rod, and the second telescopic driving device 26 and the first telescopic driving device 18 are symmetrically arranged about the center of the lifting platform 10, so that the first arm assembly and the second arm assembly are uniformly stressed, and the stability of the lifting platform 10 is ensured. Embodiment 2

[0027] Referring to Figure 1 、 Figure 3 and Figure 4As shown, the heavy-duty rail liftable flatcar further comprises a walking driving device and a transmission assembly, the walking driving device is arranged on the first supporting arm 13, the walking driving device is drivingly connected with the transmission assembly, and the transmission assembly is drivingly connected with the first roller 24 to drive the first roller 24 to move along the guide rail 11. By arranging the walking driving device and the transmission assembly, the combination of the walking driving device and the transmission assembly can drive the first roller 24 to rotate, realize the movement of the first roller 24 and drive the second roller 25 to move along the guide rail 11, so that the movement of the lifting flatcar is easily and efficiently realized without excessive labor cost, a large amount of labor is saved, and the movement efficiency is improved. Preferably, the walking driving device comprises a motor 27, and the transmission assembly comprises a transmission shaft 28, a first chain and sprocket assembly and a second chain and sprocket assembly, the transmission shaft 28 is arranged on the first supporting arm 13, the first chain and sprocket assembly is drivingly connected between the motor 27 and the transmission shaft 28 to drive the transmission shaft 28 to rotate, and the second chain and sprocket assembly is drivingly connected between the transmission shaft 28 and the first roller 24 to drive the first roller 24 to rotate. Specifically, the first chain and sprocket assembly comprises a first double-row sprocket 29, a first double-row chain 30 and a second double-row sprocket 31, the transmission shaft 28 and the motor 27 are arranged on the first supporting arm 13, the transmission shaft 28 is arranged along the extension direction of the guide rail 11, the first double-row sprocket 29 is installed on the driving end of the motor 27, the second double-row sprocket 31 is connected between the two ends of the transmission shaft 28, the first double-row sprocket 29 and the second double-row sprocket 31 are drivingly connected through the first double-row chain 30, the motor 27 drives the first double-row sprocket 29 to rotate, and the first double-row sprocket 29 drives the transmission shaft 28 to rotate through the first double-row chain 30 and the second double-row sprocket 31; the second chain and sprocket assembly comprises two first single-row sprockets 32, two first single-row chains 33 and two second single-row sprockets 34, the two first single-row sprockets 32 are respectively installed on the two ends of the transmission shaft 28, the two second single-row sprockets 34 are respectively connected on the rotating shafts of the two first rollers 24, the first single-row sprocket 32 and the second single-row sprocket 34 located on the same side are drivingly connected through a first single-row chain 33, the transmission shaft 28 drives the two first single-row sprockets 32 to rotate, the first single-row sprocket 32 drives the second single-row sprocket 34 to rotate through the first single-row chain 33 connected therewith, thereby driving the first roller 24 to rotate and realizing the movement of the first roller 24 along the guide rail 11; in addition, a plurality of channel steels 35 are arranged below the lifting platform 10 to increase the supporting strength of the lifting platform 10.

[0028] The working principle of the above scheme is as follows:

[0029] The two connecting seats 22 are fixedly installed below the lifting platform 10, the first connecting shaft 12 and the second connecting shaft 14 are parallel to each other and are rotationally connected with the two connecting seats 22 respectively, the first telescopic driving device 18 is a first hydraulic cylinder, the piston rod of the first hydraulic cylinder is connected with the first branch arm 13 through a hinged seat and a hinged shaft, the lower end of the first branch arm 13 is provided with the first roller 24 through an axle, the first roller 24 is slidingly connected with a guide rail 11, and the cylinder body of the first hydraulic cylinder is connected with the second connecting shaft 14 through a shaft sleeve; the second telescopic driving device 26 is a second hydraulic cylinder, the piston rod of the second hydraulic cylinder is connected with the second branch arm 15 through a hinged seat and a hinged shaft, the lower end of the second branch arm 15 is provided with the second roller 25 through an axle, the second roller 25 is slidingly connected with another guide rail 11, and the cylinder body of the second hydraulic cylinder is connected with the first connecting shaft 12 through a shaft sleeve. The first branch arm 13 and the second branch arm 15 between the same guide rail 11 are hinged with the first connecting rod 19 and the second connecting rod 20 hinged to each other to form a triangular hinge joint movement, so that the lifting platform 10 is lifted or lowered.

[0030] When the height of the heavy-load rail lifting flat car is adjusted, the first hydraulic cylinder and the second hydraulic cylinder are started at the same time, when the piston rods of the two hydraulic cylinders are elongated, the first connecting shaft 12 drives the first branch arm 13 to rotate, and one end of the first branch arm 13 connected with the first roller 24 moves along the guide rail 11 to the direction close to the second branch arm 15 through the first roller 24, the second connecting shaft 14 drives the second branch arm 15 to rotate synchronously, and one end of the second branch arm 15 connected with the second roller 25 moves along the guide rail 11 to the direction close to the first branch arm 13 through the second roller 25, at this time, the lifting platform 10 is lifted; when the piston rods of the two hydraulic cylinders are retracted, the first connecting shaft 12 drives the first branch arm 13 to rotate, and one end of the first branch arm 13 connected with the first roller 24 moves along the guide rail 11 to the direction away from the second branch arm 15 through the first roller 24, the second connecting shaft 14 drives the second branch arm 15 to rotate synchronously, and one end of the second branch arm 15 connected with the second roller 25 moves along the guide rail 11 to the direction away from the first branch arm 13 through the second roller 25, at this time, the lifting platform 10 is lowered. By controlling the piston rods of the first hydraulic cylinder and the second hydraulic cylinder to be elongated or retracted at the same time, the first branch arm assembly and the second branch arm assembly can be driven to move synchronously, so that the lifting platform 10 is lifted or lowered stably.

[0031] When the heavy-load rail lifting flat car needs to be moved, the motor 27 is started, the motor 27 drives the first double-row sprocket 29 to rotate and drives the transmission shaft 28 to rotate through the first double-row chain 30 and the second double-row sprocket 31, the transmission shaft 28 drives the second single-row sprocket 34 to rotate through the first single-row sprocket 32 and the first single-row chain 33, so that the first roller 24 drives the second roller 25 to move along the guide rail 11.

[0032] From the above technical scheme can know, the utility model has at least the following advantages and positive effects:

[0033] (1) Because first telescopic drive 18 and second telescopic drive 26 are only used to drive the lifting action of first supporting arm 13 and second supporting arm 15, and lifting platform 10 is supported by first supporting arm 13 and second supporting arm 15, when heavy objects are loaded and unloaded, vibration can be effectively reduced to first telescopic drive 18 and second telescopic drive 26, thereby avoiding damage to first telescopic drive 18 and second telescopic drive 26 caused by long-term use, further reducing the risk, prolonging the service life, and meeting the use requirements.

[0034] (2) First telescopic drive 18 and second telescopic drive 26 are symmetrically arranged about the center of lifting platform 10, so that first supporting arm assembly and second supporting arm assembly are uniformly stressed, and the stability of lifting platform 10 is ensured.

[0035] (3) By arranging walking drive and transmission assembly, the combination of walking drive and transmission assembly can drive first roller 24 to rotate, realize the movement of first roller 24 and drive second roller 25 to move along guide rail 11, so that the movement of lifting flat car is easily and efficiently realized without excessive labor cost, a large amount of manpower is saved, and the moving efficiency is improved.

[0036] The above-described embodiments are only used to illustrate the technical solutions of the utility model, rather than limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model, and should be included in the protection scope of the utility model.

Claims

1. A heavy haul rail liftable flat car characterized by, The lifting mechanism is movably arranged on the track and is used to drive the lifting platform to perform lifting action. The lifting mechanism comprises a lifting driving assembly, a first supporting arm assembly and a second supporting arm assembly.

2. The heavy haul rail liftable flat car of claim 1, wherein, The first supporting arm assembly and the second supporting arm assembly are arranged at intervals along the extension direction of the track. The first supporting arm assembly and the second supporting arm assembly are rotatably connected to the lifting platform at one end thereof.

3. The heavy haul rail liftable flat car of claim 2, wherein, The other end of the first supporting arm assembly and the second supporting arm assembly is slidably connected to the track. The track comprises two guide rails arranged at intervals. The first supporting arm assembly comprises a first connecting shaft and two first supporting arms connected to each other.

4. The heavy haul rail liftable flat car of claim 3, wherein, The other end of the two first supporting arms is slidably connected to the two guide rails.

5. The heavy rail lift flat car of claim 3 or 4, wherein, The second supporting arm assembly comprises a second connecting shaft and two second supporting arms connected to each other.

6. The heavy haul rail liftable flat car of claim 5, wherein, The other end of the two second supporting arms is slidably connected to the two guide rails.

7. The heavy haul rail liftable flat car of claim 2 wherein, The lifting driving assembly comprises a first telescopic driving device and two connecting rod assemblies. The fixed end of the first telescopic driving device is rotatably connected to the first connecting shaft. The telescopic end of the first telescopic driving device is rotatably connected to the second connecting shaft. The first supporting arm and the second supporting arm on the same guide rail are connected by a connecting rod assembly. The connecting rod assembly comprises a first connecting rod and a second connecting rod. The first connecting rod is hingedly connected to the second connecting rod at one end thereof. The other end of the first connecting rod is hingedly connected to the first supporting arm. The other end of the second connecting rod is hingedly connected to the second supporting arm. The lifting driving assembly further comprises a second telescopic driving device. The fixed end of the second telescopic driving device is rotatably connected to the second connecting shaft. The telescopic end of the second telescopic driving device is rotatably connected to the first connecting shaft. The first connecting rod and the second connecting rod are hingedly connected by a guide pivot. The guide pivot is arranged below the lifting platform and is slidably connected to the lifting platform along the lifting direction of the lifting platform. Two connecting seats are arranged below the lifting platform. The connecting seats are arranged outside the two first supporting arms and the two second supporting arms along the distribution direction of the two guide rails. The opposite sides of the connecting seats are respectively provided with guide sliding grooves. The guide pivot is slidably connected to the guide sliding grooves. The first supporting arm and the guide rail are connected by a first roller. The second supporting arm and the guide rail are connected by a second roller.

8. The heavy rail lift flat car of claim 7, wherein, The heavy-load rail liftable flat car further comprises a walking driving device and a transmission assembly, the walking driving device is arranged on the first supporting arm, the walking driving device is drivingly connected with the transmission assembly, and the transmission assembly is drivingly connected with the first roller to drive the first roller to rotate and move along the guide rail.

9. The heavy rail lift flat car of claim 8, wherein, The walking driving device comprises a motor, and the transmission assembly comprises a transmission shaft, a first chain and sprocket assembly and a second chain and sprocket assembly. The transmission shaft is arranged on the first supporting arm. The first chain and sprocket assembly is drivingly connected between the motor and the transmission shaft to drive the transmission shaft to rotate. The second chain and sprocket assembly is drivingly connected between the transmission shaft and the first roller to drive the first roller to rotate.

10. The heavy rail lift flat car of claim 4, wherein, The first telescopic driving device comprises a hydraulic cylinder, a pneumatic cylinder or an electric push rod, and the second telescopic driving device comprises a hydraulic cylinder, a pneumatic cylinder or an electric push rod.

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