Track lifting device

Abstract

The utility model discloses a track lifting device which comprises a main track assembly, a lifting driving mechanism, a lap joint assembly and a lap joint driving mechanism. The main rail assembly comprises a lifting seat, a main butt joint rail and a main external fixing seat, the main butt joint rail is arranged on the lifting seat, the main external fixing seat is rotationally connected to the lifting seat, and the lifting seat has an unfolding position and a folding position. The lifting driving mechanism is connected with the main rail assembly and used for driving the lifting base to act so as to switch the unfolding position and the folding position of the lifting base. The lap joint assembly comprises a lap joint seat and a lap joint rail, the lap joint seat is rotationally connected with the lifting seat, the lap joint rail is arranged on the lap joint seat, and the lap joint seat can be unfolded and folded relative to the lifting seat. The lap joint driving mechanism is connected between the lifting base and the lap joint base and used for driving the lap joint base to act relative to the lifting base so as to switch the unfolding position and the folding position of the lap joint base. According to the track lifting device, a gap can be effectively prevented from being formed between the track lifting device and the in-tank track, and therefore the material conveying trolley is not prone to shaking during material conveying.

Description

Technical Field

[0001] The utility model relates to vacuum equipment, in particular to a track lifting device. Background Art

[0002] Some existing vacuum equipment is equipped with a horizontal tank. During production, materials weighing from hundreds of kilograms to tens of tons need to be added to the horizontal tank. At this time, a material transport cart is used to deliver the materials into the tank. Wheels are set at the bottom of the material transport cart, and the wheels need to enter and exit the horizontal tank through tracks. In order to facilitate the opening and closing of the tank door, the existing horizontal tank usually lays a foundation in front of the tank door to form a foundation pit. In order to cross the foundation pit, a connecting track is usually set at the foundation pit to connect the track inside the tank and the track outside the tank. In the prior art, in order to achieve the docking of the rails, one way is to use a crane to lift the prepared connecting guide rails to the foundation pit for installation. This method is time-consuming and labor-intensive, which affects production efficiency. In addition, in order to avoid interference, there will be a gap between the connecting rail and the rail inside the tank. When the material transport cart moves to this section, it will shake, which may easily cause material splashing. Another way is to install the connecting rail on a rotating mechanism and move the rail to a specified position through the movement of the mechanism. Although this saves time and effort, it will take up more space. In addition, because the rotating diameter is too long, in order to ensure that there is no interference, there will also be a gap between the connecting rail and the rail inside the tank. There is also the aforementioned problem of shaking of the material transport cart. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a track lifting device, which can effectively avoid the formation of a gap with the track in the tank, so that the material transporting trolley is not easy to shake when transporting materials.

[0004] According to a track lifting device of an embodiment of the utility model, it includes: a main track assembly, including a lifting seat, a main docking track and a main external fixing seat, the main docking track is arranged on the lifting seat, the main external fixing seat is rotatably connected to the lifting seat, the main external fixing seat is provided with an external fixing structure, the lifting seat has an unfolded position and a folded position: when the lifting seat is in the unfolded position, the main docking track on the lifting seat is horizontally arranged; when the lifting seat is in the folded position, the lifting seat is folded relative to the main external fixing seat; a lifting drive mechanism is connected to the main track assembly and is used to drive the lifting seat to move, so as to Switching its unfolded and folded positions; a lap joint assembly, comprising a lap joint seat and a lap joint track, the lap joint seat is rotatably connected to the lifting seat, the lap joint track is arranged on the lap joint seat, and the lap joint seat can be unfolded and folded relative to the lifting seat: when the lap joint seat is unfolded, the lap joint seat is unfolded on the front side of the lifting seat, the lap joint track is arranged horizontally and the rear end is docked with the front end of the main docking track; when the lap joint seat is folded, the lap joint seat is folded relative to the lifting seat; an lap joint driving mechanism is connected between the lifting seat and the lap joint seat and is used to drive the lap joint seat to move relative to the lifting seat to switch its unfolded and folded positions.

[0005] A track lifting device according to an embodiment of the utility model has at least the following beneficial effects: the track lifting device mentioned above is provided with an overlap assembly on the basis of the main track assembly, and the overlap seat and the overlap track can be overlapped at the tank mouth to connect with the track inside the tank, thereby effectively eliminating the track gap, reducing the shaking of the material transport trolley, and effectively avoiding the splashing of materials during the transportation process; the track lifting device adopts a two-stage folding method, occupies a small space, and is simple and convenient to install.

[0006] According to some embodiments of the present utility model, the main pair of external fixed seats are hinged to the rear end of the lifting seat, the lifting drive mechanism includes a support frame and a lifting drive, the upper end of the support frame is hinged to the middle front part of the lifting seat, the lower end of the support frame is provided with walking wheels, and the lifting drive is used to drive the support frame to swing back and forth to adjust the position to support the lifting seat or drive the lifting seat to rotate downward and fold.

[0007] According to some embodiments of the utility model, the lifting drive includes a first cylinder body and a first actuating rod capable of telescopic movement relative to the first cylinder body, the support frame is provided with a first hinge portion, the tail end of one of the first cylinder body and the first actuating rod is hinged to the first hinge portion, the tail end of the other of the first cylinder body and the first actuating rod is hinged to a secondary external fixing seat, the secondary external fixing seat is provided with an external fixing structure, and the secondary external fixing seat is arranged on the lower side of the main external fixing seat.

[0008] According to some embodiments of the utility model, the support frame includes a transverse connecting rod and two wheel rods, the two wheel rods are connected to the left and right ends of the transverse connecting rod to form an H shape, the upper ends of the two wheel rods are respectively hinged to the left and right sides of the lifting seat, the lower ends of the two wheel rods are provided with the walking wheels, and the first hinged portion is provided on the transverse connecting rod.

[0009] According to some embodiments of the present invention, two main external fixing seats are provided and are respectively arranged on the left and right sides of the lifting seat.

[0010] According to some embodiments of the utility model, the rear end of the lap seat is rotatably connected to the front end of the lifting seat, the lap drive mechanism includes a second cylinder body and a second actuating rod that can telescope relative to the second cylinder body, the lifting seat is provided with a second hinged portion, and the tail end of one of the second cylinder body and the second actuating rod is hinged to the second hinged portion, and the lap seat is provided with a third hinged portion, and the tail end of the other of the second cylinder body and the second actuating rod is hinged to the third hinged portion.

[0011] According to some embodiments of the present invention, when the lifting seat is folded, the lifting seat is folded downward relative to the main external fixing seat.

[0012] According to some embodiments of the utility model, the rear end of the lap seat is rotatably connected to the front end of the lifting seat, and when the lap seat is folded, the lap seat is folded upward relative to the lifting seat.

[0013] According to some embodiments of the utility model, a chamfered end surface is provided at the front end of the overlapping track, and when the overlapping seat is unfolded, the chamfered end surface at the front end of the overlapping track faces obliquely downward.

[0014] According to some embodiments of the utility model, the front end of the main docking track and the rear end of the lap track are respectively provided with mutually adaptable beveled end surfaces, and when the lap seat is unfolded, the front end of the main docking track and the rear end of the lap track are overlapped together through the corresponding beveled end surfaces.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 This is one of the three-dimensional schematic diagrams of the embodiment of the utility model in the folded state;

[0018] Figure 2 This is the second three-dimensional schematic diagram of the embodiment of the utility model in the folded state;

[0019] Figure 3 It is a schematic diagram of the structure of the embodiment of the utility model in a folded state after being installed in a foundation pit;

[0020] Figure 4 It is a schematic diagram of the structure of the embodiment of the utility model in an unfolded state after being installed in a foundation pit;

[0021] Figure 5 It is a three-dimensional schematic diagram of the embodiment of the utility model when the inner rail of the tank and the outer rail of the tank are connected;

[0022] Figure 6 for Figure 5 A three-dimensional schematic diagram of an embodiment of the utility model when folded.

[0023] Reference numerals:

[0024] Main track assembly 100, lifting seat 110, main docking track 120, main external fixing seat 130, second hinged portion 111;

[0025] Lifting drive mechanism 200, support frame 210, lifting drive 220, auxiliary external fixing seat 230, walking wheel 211, first cylinder 221, first action rod 222, first hinge part 212, transverse connecting rod 213, wheel rod 214;

[0026] The overlapping assembly 300, the overlapping seat 310, the overlapping track 320, and the third hinge part 311;

[0027] Overlap driving mechanism 400 , second cylinder 410 , second actuating rod 420 . DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] Reference Figures 1 to 6 A track lifting device includes: a main track assembly 100, a lifting drive mechanism 200, a lap assembly 300 and a lap drive mechanism 400. The main track assembly 100 includes a lifting seat 110, a main docking track 120 and a main external fixing seat 130. The main docking track 120 is arranged on the lifting seat 110, the main external fixing seat 130 is rotatably connected to the lifting seat 110, and the main external fixing seat 130 is provided with an external fixing structure. The lifting seat 110 has an unfolded position and a folded position: when the lifting seat 110 is in the unfolded position, the main docking track 120 on the lifting seat 110 is arranged horizontally; when the lifting seat 110 is in the folded position, the lifting seat 110 is folded relative to the main external fixing seat 130. The lifting drive mechanism 200 is connected to the main track assembly 100 and is used to drive the lifting seat 110 to move so as to switch its unfolded and folded positions. The overlap assembly 300 includes an overlap seat 310 and an overlap track 320. The overlap seat 310 is rotatably connected to the lifting seat 110. The overlap track 320 is arranged on the overlap seat 310. The overlap seat 310 can be unfolded and folded relative to the lifting seat 110: when the overlap seat 310 is unfolded, the overlap seat 310 is unfolded on the front side of the lifting seat 110, and the overlap track 320 is arranged horizontally and the rear end is docked with the front end of the main docking track 120; when the overlap seat 310 is folded, the overlap seat 310 is folded relative to the lifting seat 110. The overlap driving mechanism 400 is connected between the lifting seat 110 and the overlap seat 310 and is used to drive the overlap seat 310 to move relative to the lifting seat 110 to switch its unfolded and folded positions.

[0033] When the above-mentioned track lifting device is used, it is installed in a foundation pit. The main external fixing seat 130 of the main track assembly 100 can be fixed to the vertical wall of the foundation pit or other suitable positions through the external fixing structure, so that the lifting seat 110 can be rotated, unfolded and folded with the main external fixing seat 130 as support. When the track inside the tank needs to be docked with the track outside the tank, the lifting seat 110 is driven to unfold through the lifting drive mechanism 200, and the main docking track 120 enters a horizontal state so that it can dock with the track outside the tank. At the same time, the lap drive mechanism 400 drives the lap seat 310 to move, so that the lap seat 310 is unfolded on the front side of the lifting seat 110, so that it can be overlapped at the tank mouth of the horizontal tank, and the lap track 320 enters a horizontal state so that it can dock with the track inside the tank. At the same time, the rear end of the lap track 320 and the front end of the main docking track 120 form a docking, so that the track outside the tank and the track inside the tank are docked through the main docking track 120 and the lap track 320, and the material transport trolley can cross the foundation pit with the help of the main docking track 120 and the lap track 320. After the material is transported, the lifting seat 110 and the lap seat 310 can be folded to make way, so as not to affect the closing of the tank door.

[0034] The above-mentioned track lifting device is provided with a lap assembly 300 on the basis of the main track assembly 100. The lap seat 310 and the lap track 320 can be overlapped at the tank mouth to connect with the track inside the tank, thereby effectively eliminating the track gap, reducing the shaking of the material transport trolley, and effectively avoiding the splashing of materials during the transportation process; the track lifting device adopts a two-stage folding, which occupies a small space and is simple and convenient to install. In the specific implementation, the overall intelligent level can be improved by further configuring the electric control system and the electric drive, so that one-button start can be achieved, saving time and effort.

[0035] In the embodiment, the main pair of external fixing seats 130 are hinged to the rear end of the lifting seat 110, and the lifting drive mechanism 200 includes a support frame 210 and a lifting drive 220. The upper end of the support frame 210 is hinged to the middle front part of the lifting seat 110, and the lower end of the support frame 210 is provided with a walking wheel 211. The lifting drive 220 is used to drive the support frame 210 to swing forward and backward to adjust the position to support the lifting seat 110 or drive the lifting seat 110 to rotate downward and fold. The walking wheel 211 provided at the lower end of the support frame 210 can be used to roll on the bottom wall of the foundation pit. The lifting drive 220 drives the support frame 210 to swing. The support frame 210 can be supported on the bottom wall of the foundation pit by the walking wheel 211, so that the lifting seat 110 can be supported; when the support frame 210 is reset, the support for the lifting seat 110 can be removed, and the lifting seat 110 can be rotated downward and folded. The above structure is adopted to realize the unfolding and folding of the lifting seat 110, and the structure is simple and easy to implement. It is conceivable that the specific implementation of the lifting drive mechanism 200 is not limited to the above structure. For example, the lifting drive mechanism 200 is a lifting mechanism, and the lifting mechanism directly lifts the lifting seat 110 up and down to realize its unfolding and folding.

[0036] In the embodiment, the lifting driver 220 includes a first cylinder 221 and a first action rod 222 that can be extended and retracted relative to the first cylinder 221. The support frame 210 is provided with a first hinged portion 212. The tail end of the first action rod 222 is hinged to the first hinged portion 212. The tail end of the first cylinder 221 is hinged with a secondary external fixing seat 230. The secondary external fixing seat 230 is provided with an external fixing structure. The secondary external fixing seat 230 is arranged at the lower side of the main external fixing seat 130. The secondary external fixing seat 230 can be fixed to the vertical wall of the foundation pit through its external fixing structure. When the first action rod 222 is extended and retracted relative to the first cylinder 221, the support frame 210 can be pushed forward or pulled backward, so that the support frame 210 can enter the position of supporting the lifting seat 110 and the lifting seat 110 can be folded downward.

[0037] In the embodiment, the tail end of the first cylinder 221 is connected to the secondary external fixing seat 230, and the tail end of the first actuating rod 222 is connected to the first hinged portion 212. It is conceivable that the first cylinder 221 and the first actuating rod 222 can also be switched to connect to the secondary external fixing seat 230 and the first hinged portion 212. In the embodiment, the first hinged portion 212 can be a hinged seat or a hinged shaft.

[0038] In an embodiment, the lifting drive 220 may adopt a hydraulic cylinder; of course, it is conceivable that in some embodiments, the lifting drive 220 may also adopt a drive such as an electric push rod.

[0039] It is understandable that the lifting driver 220 is not limited to the above structure to achieve position driving of the support frame 210. For example, the lifting driver 220 is connected between the lifting base 110 and the support frame 210, and the position change of the support frame 210 is achieved by stretching or pulling the two together.

[0040] In the embodiment, both the main external fixing seat 130 and the auxiliary external fixing seat 230 are provided with an external fixing structure; specifically, the external fixing structure can be a mounting plate, the mounting plate has holes for bolts to pass through, the mounting plate can be attached to the vertical wall of the foundation pit, and the bolts can fix the mounting plate to the vertical wall of the foundation pit. Of course, it is conceivable that the external fixing structure is not limited to the above structure. For example, when embedded parts are pre-buried in the foundation pit, the external fixing structure can be a connection structure that matches the embedded parts.

[0041] In the embodiment, the support frame 210 includes a transverse connecting rod 213 and two wheel rods 214, the two wheel rods 214 are connected to the left and right ends of the transverse connecting rod 213 to form an H shape, the upper ends of the two wheel rods 214 are respectively hinged to the left and right sides of the lifting seat 110, the lower ends of the two wheel rods 214 are both provided with walking wheels 211, and the first hinge part 212 is provided on the transverse connecting rod 213. Through the above structure, a two-point connection and a two-point wheel support can be formed, and the support is stable.

[0042] In the embodiment, two main external fixing seats 130 are provided and are respectively arranged on the left and right sides of the lifting seat 110 , so that the external connection of the lifting seat 110 is stable.

[0043] In the embodiment, the rear end of the lap seat 310 is rotatably connected to the front end of the lifting seat 110, the lap drive mechanism 400 includes a second cylinder 410 and a second action rod 420 that can telescope relative to the second cylinder 410, the lifting seat 110 is provided with a second hinge 111, the tail end of the second cylinder 410 is hinged to the second hinge 111, the lap seat 310 is provided with a third hinge 311, and the tail end of the second action rod 420 is hinged to the third hinge 311. When the second action rod 420 telescopes relative to the second cylinder 410, the lifting seat 110 and the lap seat 310 can be stretched apart, or the two can be brought closer, thereby realizing the relative expansion and folding of the two. The above-mentioned driving method for realizing the expansion and folding of the lap seat 310 is simple in structure, easy to realize, and has stable support. Of course, it is conceivable that the overlapping driving mechanism 400 is not limited to the above-mentioned embodiments. For example, some drivers that can drive the overlapping seat 310 to rotate can be provided to directly drive the overlapping seat 310 to rotate, unfold, and fold.

[0044] In the embodiment, the second cylinder 410 is connected to the second hinge 111, and the second action rod 420 is connected to the third hinge 311; it is conceivable that the second cylinder 410 and the second action rod 420 can also be connected to the second hinge 111 and the third hinge 311 by switching positions. In the embodiment, the overlap drive mechanism 400 is specifically a hydraulic cylinder. Of course, it is conceivable that in some embodiments, the lifting drive 220 can also use a drive such as an electric push rod. In the embodiment, the rear end of the overlap seat 310 is rotatably connected to the front end of the lifting seat 110, and can be directly hinged or indirectly hinged through a connecting rod.

[0045] In the embodiment, when the lifting seat 110 is folded, the lifting seat 110 is folded downward relative to the main external fixing seat 130, so that it can be folded into the foundation pit to better avoid the tank door.

[0046] In the embodiment, the rear end of the lap seat 310 is rotatably connected to the front end of the lifting seat 110. When the lap seat 310 is folded, the lap seat 310 is folded upward relative to the lifting seat 110. With the above structural setting, the lap seat 310 can overlap the can mouth downward when unfolded, so that interference is not easy to occur.

[0047] In the embodiment, the front end of the lap track 320 is provided with a beveled end face, and when the lap seat 310 is unfolded, the beveled end face of the front end of the lap track 320 faces obliquely downward. A matching beveled end face can be provided at one end of the tank track corresponding to the lap track 320, so that it can overlap with the beveled end face of the front end of the lap track 320, and the joint is tightly matched, stable, and has a small gap.

[0048] In the embodiment, the front end of the main docking track 120 and the rear end of the lap track 320 are respectively provided with mutually adapted chamfered end faces, and when the lap seat 310 is unfolded, the front end of the main docking track 120 and the rear end of the lap track 320 are overlapped together through the corresponding chamfered end faces. The above structure is used to make the main docking track 120 and the lap track 320 dock, and the docking joint is tightly matched, stable, and has a small gap.

[0049] In the embodiment, two main docking tracks 120 are provided and are respectively located on the left and right sides of the lifting seat 110, and two lap tracks 320 are provided and are respectively located on the left and right sides of the lap track 310, so that a double track can be formed, and the operation of the corresponding pusher trolley is stable. In the embodiment, the upper end surface of the lifting seat 110 is also provided with a secondary track, and the secondary track is provided between the two main docking tracks 120. By providing the secondary track, the support points can be increased, and the feed trolley is more stable. It is conceivable that the specific number and structure of the tracks provided can be configured according to actual conditions and are not limited to the implementation methods shown in the drawings.

[0050] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A track lifting device, characterized in that: include: A main track assembly (100) comprises a lifting seat (110), a main docking track (120) and a main external fixing seat (130), wherein the main docking track (120) is arranged on the lifting seat (110), the main external fixing seat (130) is rotatably connected to the lifting seat (110), the main external fixing seat (130) is provided with an external fixing structure, and the lifting seat (110) has an unfolded position and a folded position: when the lifting seat (110) is in the unfolded position, the main docking track (120) on the lifting seat (110) is arranged horizontally; when the lifting seat (110) is in the folded position, the lifting seat (110) is folded relative to the main external fixing seat (130); A lifting drive mechanism (200) connected to the main track assembly (100) and used to drive the lifting seat (110) to move so as to switch its unfolded and folded positions; The overlap assembly (300) comprises an overlap seat (310) and an overlap track (320), wherein the overlap seat (310) is rotatably connected to the lifting seat (110), and the overlap track (320) is arranged on the overlap seat (310), and the overlap seat (310) can be unfolded and folded relative to the lifting seat (110): when the overlap seat (310) is unfolded, the overlap seat (310) is unfolded on the front side of the lifting seat (110), and the overlap track (320) is arranged horizontally and the rear end is docked with the front end of the main docking track (120); when the overlap seat (310) is folded, the overlap seat (310) is folded relative to the lifting seat (110); The overlapping driving mechanism (400) is connected between the lifting seat (110) and the overlapping seat (310) and is used to drive the overlapping seat (310) to move relative to the lifting seat (110) to switch the unfolding and folding positions thereof.

2. The rail lifting device according to claim 1, characterized in that: The main external fixing seat (130) is hinged to the rear end of the lifting seat (110); the lifting drive mechanism (200) comprises a support frame (210) and a lifting drive (220); the upper end of the support frame (210) is hinged to the middle front part of the lifting seat (110); the lower end of the support frame (210) is provided with a walking wheel (211); the lifting drive (220) is used to drive the support frame (210) to swing forward and backward to adjust the position so as to support the lifting seat (110) or drive the lifting seat (110) to rotate downward and fold.

3. The rail lifting device according to claim 2, characterized in that: The lifting drive (220) comprises a first cylinder (221) and a first actuating rod (222) capable of telescopic movement relative to the first cylinder (221); the support frame (210) is provided with a first hinged portion (212); the tail end of one of the first cylinder (221) and the first actuating rod (222) is hinged to the first hinged portion (212); the tail end of the other of the first cylinder (221) and the first actuating rod (222) is hinged to a secondary external fixing seat (230); the secondary external fixing seat (230) is provided with an external fixing structure; the secondary external fixing seat (230) is arranged on the lower side of the main external fixing seat (130).

4. The rail lifting device according to claim 3, characterized in that: The support frame (210) comprises a transverse connecting rod (213) and two wheel rods (214); the two wheel rods (214) are connected to the left and right ends of the transverse connecting rod (213) to form an H shape; the upper ends of the two wheel rods (214) are respectively hinged to the left and right sides of the lifting seat (110); the lower ends of the two wheel rods (214) are both provided with the walking wheels (211); and the first hinged portion (212) is provided on the transverse connecting rod (213).

5. The rail lifting device according to claim 2, characterized in that: Two main external fixing seats (130) are provided and are respectively arranged on the left and right sides of the lifting seat (110).

6. The rail lifting device according to claim 1, characterized in that: The rear end of the lap joint seat (310) is rotatably connected to the front end of the lifting seat (110); the lap joint driving mechanism (400) comprises a second cylinder body (410) and a second actuating rod (420) capable of telescopic movement relative to the second cylinder body (410); the lifting seat (110) is provided with a second hinged portion (111); the tail end of one of the second cylinder body (410) and the second actuating rod (420) is hinged to the second hinged portion (111); the lap joint seat (310) is provided with a third hinged portion (311); the tail end of the other of the second cylinder body (410) and the second actuating rod (420) is hinged to the third hinged portion (311).

7. The rail lifting device according to claim 1, characterized in that: When the lifting seat (110) is folded, the lifting seat (110) is folded downward relative to the main external fixing seat (130).

8. The rail lifting device according to claim 1 or 7, characterized in that: The rear end of the lap seat (310) is rotatably connected to the front end of the lifting seat (110); when the lap seat (310) is folded, the lap seat (310) is folded upward relative to the lifting seat (110).

9. The rail lifting device according to claim 8, characterized in that: The front end of the lap track (320) is provided with a beveled end surface, and when the lap seat (310) is unfolded, the beveled end surface at the front end of the lap track (320) faces obliquely downward.

10. The rail lifting device according to claim 8, characterized in that: The front end of the main docking track (120) and the rear end of the lap track (320) are respectively provided with mutually matching beveled end surfaces, and when the lap seat (310) is unfolded, the front end of the main docking track (120) and the rear end of the lap track (320) are overlapped together through the corresponding beveled end surfaces.

Images