Fixed rail wheel lifting structure and highway-railway dual-purpose flat car

Abstract

The utility model provides a fixed-rail wheel lifting structure and a highway-railway dual-purpose flat car. The fixed-rail wheel lifting structure comprises a fixed plate, a movable plate and a movable plate, the limiting frame is connected with the fixing plate; the connecting part is arranged in the limiting frame, the connecting part is movably arranged relative to the limiting frame, the connecting part and the fixing plate are arranged in a spaced mode, the connecting part is connected with a fixed rail wheel, and the fixed rail wheel is rotatably arranged relative to the connecting part; the threaded rod penetrates through the fixing plate to be connected with the connecting part, the threaded rod is rotatably arranged relative to the fixing plate, and the connecting part is driven to move in the limiting frame through rotation of the threaded rod, so that the orbit determination wheel is driven to move, and the distance between the orbit determination wheel and the fixing plate is adjusted. According to the fixed rail wheel lifting structure and the highway-railway dual-purpose flat car, the technical problems that in the prior art, a fixed rail wheel lifting mechanism is complex in structure and large in occupied space are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of road-rail dual-purpose equipment, and in particular to a rail-fixing wheel lifting structure and a road-rail dual-purpose flatbed vehicle. Background Art

[0002] A dual-purpose flatbed truck for road and rail refers to a flatbed truck with a road driving mode and a rail driving mode. The rubber wheels and the fixed-track wheels are controlled by a lifting mechanism. When the fixed-track wheels rise, the rubber wheels come into contact with the ground to achieve road driving. When the fixed-track wheels fall, the fixed-track wheels come into contact with the rail to achieve rail driving. The dual-purpose flatbed truck for road and rail can meet the needs of two work sites and realize multiple uses of one vehicle. It can be operated on different grounds and can be moved to an empty place when not in use, without affecting the operation of other vehicles. It has the advantages of smooth starting, convenient track changing and wide application range, and is loved by the majority of users.

[0003] However, the existing rail wheel lifting mechanism is to suspend the rail wheel on the flatbed vehicle support, and then use the two ends of the hydraulic rod to connect the rail wheel and the flatbed vehicle support respectively, and through the extension and retraction of the hydraulic rod, pull the rail wheel to move so as to adjust the distance between the rail wheel and the support to realize the lifting function of the rail wheel. This design is not only complex in structure, increases the difficulty of production and increases the manufacturing cost, but also occupies a large area when in use and is inflexible in operation.

[0004] Therefore, the prior art needs to be further developed. Utility Model Content

[0005] The purpose of the utility model is to overcome the above technical deficiencies and provide a rail-fixing wheel lifting structure and a road-rail dual-purpose flatbed vehicle to solve the technical problems in the related art that the lifting mechanism of the rail-fixing wheel is complex in structure and occupies a large space.

[0006] In order to achieve the above technical objectives, the utility model adopts the following technical solutions: a rail-fixing wheel lifting structure is provided, including: a fixed plate; a limiting frame, the limiting frame is connected to the fixed plate; a connecting component, the connecting component is arranged in the limiting frame, the connecting component is movably arranged relative to the limiting frame, the connecting component and the fixed plate are arranged at intervals, the connecting component is connected to the rail-fixing wheel, and the rail-fixing wheel is rotatably arranged relative to the connecting component; a threaded rod, the threaded rod passes through the fixed plate and is connected to the connecting component, the threaded rod is rotatably arranged relative to the fixed plate, and the threaded rod is rotated to drive the connecting component to move in the limiting frame, thereby driving the rail-fixing wheel to move, so as to adjust the distance between the rail-fixing wheel and the fixed plate.

[0007] Furthermore, the rail-fixing wheel lifting structure also includes a driving motor, the output end of the driving motor is connected to the threaded rod through a conversion component, the driving motor and the conversion component are both arranged on the side of the fixed plate away from the limit frame, the threaded rod is sleeved on the conversion component, and the threaded rod is rotatably arranged relative to the conversion component; the driving motor drives the threaded rod to move relative to the fixed plate.

[0008] Furthermore, the limiting frame includes a first limiting plate, a second limiting plate, a third limiting plate and a fourth limiting plate, which are connected in sequence to form a lifting cavity, and the rotating threaded rod drives the connecting component to move in the lifting cavity.

[0009] Furthermore, the first limit plate, the second limit plate, the third limit plate and the fourth limit plate are respectively perpendicular to the fixed plate; the connecting component includes a first connecting plate, a second connecting plate and a third connecting plate, the first connecting plate, the second connecting plate and the third connecting plate are connected in sequence, the first connecting plate and the third connecting plate are respectively located on both sides of the rail-fixing wheel, the threaded rod is connected to the second connecting plate, the threaded rod is perpendicular to the second connecting plate, and the second connecting plate is parallel to the fixed plate.

[0010] Furthermore, a connecting shaft is provided on the connecting component, one end of the connecting shaft is connected to the first connecting plate, the other end of the connecting shaft is connected to the third connecting plate, the track-fixing wheel passes through the connecting shaft, and the track-fixing wheel is rotatably provided relative to the connecting shaft.

[0011] Furthermore, the connecting shaft is detachably arranged, and the connecting component also includes two first fasteners, which are detachably connected to the two ends of the connecting shaft respectively. When the first fasteners are connected to the connecting shaft, the two first fasteners protrude from the first connecting plate and the third connecting plate respectively; the first limit plate is arranged parallel to the first connecting plate, and the third limit plate is arranged parallel to the third connecting plate. The first limit plate and the third limit plate are both provided with lifting grooves, and the lifting grooves are arranged corresponding to the first fasteners. When the threaded rod drives the connecting component to move toward the direction close to the fixed plate, the first fastener is located in the lifting groove.

[0012] Furthermore, there are two fixed plates, two limiting frames, two connecting parts, two threaded rods and two rail-fixing wheels respectively, and the two fixed plates, two limiting frames, two connecting parts, two threaded rods and two rail-fixing wheels are symmetrically arranged. Connecting plates are arranged on the two first connecting plates, and the rail-fixing wheel lifting structure also includes a connecting rod, and the two ends of the connecting rod are respectively connected to two connecting plates to connect the two connecting parts.

[0013] Furthermore, the connecting rod is detachably arranged with the two connecting parts respectively, the two connecting plates are respectively provided with a first through hole, and both ends of the connecting rod are provided with a second through hole. The rail-fixing wheel lifting structure also includes two second fasteners, and the two second fasteners are detachably arranged. The two second fasteners pass through the two ends of the connecting rod, the first through hole and the second through hole respectively to connect the two connecting parts through the connecting rod.

[0014] A dual-purpose road-rail flatbed vehicle comprises a fixed frame and a plurality of rubber wheels, wherein each rubber wheel is respectively fixed on the fixed frame and the rubber wheels are rotatably arranged relative to the fixed frame. The dual-purpose road-rail flatbed vehicle also comprises the above-mentioned rail-fixing wheel lifting structure, wherein there are two rail-fixing wheel lifting structures, and the two rail-fixing wheel lifting structures are respectively fixed at two ends of the fixed frame.

[0015] Furthermore, the road-rail dual-purpose flatbed vehicle also includes a crossbeam, both ends of which are respectively connected to two fixed plates of the rail-fixing wheel lifting structure, and the crossbeam is fixed on a fixed frame.

[0016] Beneficial effects:

[0017] 1. The rail-fixing wheel lifting structure of the utility model can realize the lifting of the rail-fixing wheel by driving the connecting parts to move up and down through the threaded rod. The structure is simple and the manufacturing difficulty and processing cost are reduced.

[0018] 2. With the rail-fixing wheel lifting structure of the utility model, the rotating threaded rod drives the rail-fixing wheel to rise and fall through straight up and down movements, which effectively saves lifting space and reduces the occupied area of ​​the lifting structure.

[0019] 3. When the utility model is used for the dual-purpose flatbed truck for road and rail, the lifting structure of the fixed track wheel occupies a small area, making the dual-purpose flatbed truck for road and rail more flexible and compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of the first viewing angle of the rail-fixing wheel lifting structure adopted in the embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the second viewing angle of the rail-fixing wheel lifting structure adopted in the embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the connecting components of the rail-fixing wheel lifting structure adopted in the embodiment of the utility model;

[0023] Figure 4 It is a structural schematic diagram of the rail-fixing wheel lifting structure adopted in the embodiment of the utility model from a third perspective;

[0024] Figure 5 It is a structural schematic diagram of the connecting rod of the rail-fixing wheel lifting structure adopted in the embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of a road-rail dual-purpose flatbed vehicle adopted in an embodiment of the utility model.

[0026] The above drawings include the following reference numerals:

[0027] 1. Fixed plate; 2. Limiting frame; 21. First limiting plate; 22. Second limiting plate; 23. Third limiting plate; 24. Fourth limiting plate; 25. Lifting chamber; 26. Lifting slot; 3. Connecting component; 31. First connecting plate; 32. Second connecting plate; 33. Third connecting plate; 34. Connecting shaft; 35. First fastener; 36. Connecting piece; 361. First through hole; 37. Connecting rod; 371. Second through hole; 41. Threaded rod; 42. Driving motor; 43. Adapter component; 5. Track-fixing wheel; 6. Fixed frame; 61. Towing hook; 7. Rubber wheel; 8. Crossbeam. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0029] According to the embodiment of the utility model, a track-fixing wheel lifting structure is provided. Figures 1 to 6, including: a fixed plate 1; a limiting frame 2, the limiting frame 2 is connected to the fixed plate 1; a connecting component 3, the connecting component 3 is arranged in the limiting frame 2, the connecting component 3 is movably arranged relative to the limiting frame 2, the connecting component 3 is arranged at intervals with the fixed plate 1, the connecting component 3 is connected with a rail-fixing wheel 5, and the rail-fixing wheel 5 is rotatably arranged relative to the connecting component 3; a threaded rod 41, the threaded rod 41 passes through the fixed plate 1 and is connected to the connecting component 3, the threaded rod 41 is rotatably arranged relative to the fixed plate 1, and the threaded rod 41 rotates to drive the connecting component 3 to move in the limiting frame 2, thereby driving the rail-fixing wheel 5 to move, so as to adjust the distance between the rail-fixing wheel 5 and the fixed plate 1. The connecting component 3 is arranged at intervals with the fixed plate 1, the threaded rod 41 passes through the fixed plate 1 and is connected to the connecting component 3, and the connecting component 3 is connected with a rail-fixing wheel 5, and the rail-fixing wheel 5 is rotatable. The connecting component 3 is arranged in the limiting frame 2. When the threaded rod 41 rotates on the fixing plate 1, the connecting component 3 is driven to move up and down in the limiting frame 2, so that the connecting component 3 drives the rail-fixing wheel 5 to move, thereby adjusting the distance between the rail-fixing wheel 5 and the fixing plate 1, and realizing the lifting effect of the rail-fixing wheel 5. The function of the limiting frame 2 is to limit the rotation of the connecting component 3 when the threaded rod 41 rotates, so as to ensure that the connecting component 3 can move up and down. In the lifting structure of the rail-fixing wheel of this embodiment, the lifting and lowering of the rail-fixing wheel 5 is realized by driving the connecting component 3 up and down by the threaded rod 41. The structure is simple, which reduces the manufacturing difficulty and processing cost, occupies less space when in use, and solves the technical problems of the complex structure and large space occupied by the lifting mechanism of the rail-fixing wheel in the related art.

[0030] See also Figure 1 In the rail-fixing wheel lifting structure of the present embodiment, the rail-fixing wheel lifting structure further includes a driving motor 42, the output end of the driving motor 42 is connected to the threaded rod 41 through a transfer component 43, the driving motor 42 and the transfer component 43 are both arranged on the side of the fixed plate 1 away from the limiting frame 2, the threaded rod 41 is sleeved on the transfer component 43, and the threaded rod 41 is rotatably arranged relative to the transfer component 43; the threaded rod 41 is driven by the driving motor 42 to move relative to the fixed plate 1. In addition to manually rotating the threaded rod 41 to lift the rail-fixing wheel 5, the rail-fixing wheel lifting structure of the present embodiment is arranged to electrically control the threaded rod 41. The driving motor 42 is arranged on the side of the fixed plate 1 away from the limiting frame 2. In order to further save space, the output end of the driving motor 42 is connected to the threaded rod 41 through the transfer component 43, so that the driving motor 42 drives the threaded rod 41 to rotate relative to the fixed plate 1.

[0031] Specifically, a gear is disposed inside the adapter component 43, and the output end of the driving motor 42 is connected to the gear. When the gear rotates, the threaded rod is driven to move.

[0032] See also Figure 1In the rail-fixing wheel lifting structure of the present embodiment, the limiting frame 2 includes a first limiting plate 21, a second limiting plate 22, a third limiting plate 23 and a fourth limiting plate 24, which are sequentially connected to form a lifting chamber 25, and the threaded rod 41 is rotated to drive the connecting component 3 to move in the lifting chamber 25. The first limiting plate 21, the second limiting plate 22, the third limiting plate 23 and the fourth limiting plate 24 are sequentially connected to surround the connecting component 3, which not only plays a role in limiting the rotation of the connecting component 3, but also effectively prevents dust from entering the lifting chamber 25.

[0033] See also Figure 2 and Figure 3 In the rail-fixing wheel lifting structure of the present embodiment, the first limiting plate 21, the second limiting plate 22, the third limiting plate 23 and the fourth limiting plate 24 are respectively perpendicular to the fixed plate 1; the connecting component 3 includes a first connecting plate 31, a second connecting plate 32 and a third connecting plate 33, the first connecting plate 31, the second connecting plate 32 and the third connecting plate 33 are connected in sequence, the first connecting plate 31 and the third connecting plate 33 are respectively located on both sides of the rail-fixing wheel 5, the threaded rod 41 is connected to the second connecting plate 32, the threaded rod 41 is perpendicular to the second connecting plate 32, and the second connecting plate 32 is parallel to the fixed plate 1. The threaded rod 41 is perpendicular to and connected to the second connecting plate 32, and the second connecting plate 32 is parallel to the fixed plate 1. In this way, the rail-fixing wheel 5 is in a straight up and down moving state, which can maximize the use of the rotation force, and the limiting frame 2 is arranged perpendicular to the fixed plate 1, which reduces the range of movement of the rail-fixing wheel 5 in the lifting chamber 25, and effectively saves the occupied space.

[0034] See also Figure 3 In the rail-fixing wheel lifting structure of this embodiment, a connecting shaft 34 is further provided on the connecting component 3, one end of the connecting shaft 34 is connected to the first connecting plate 31, and the other end of the connecting shaft 34 is connected to the third connecting plate 33. The rail-fixing wheel 5 is arranged through the connecting shaft 34, and the rail-fixing wheel 5 is rotatably arranged relative to the connecting shaft 34. The rail-fixing wheel 5 is sleeved on the connecting shaft 34, and the connecting shaft 34 crosses the first connecting plate 31 and the third connecting plate 33 to clamp the rail-fixing wheel 5 between the first connecting plate 31 and the third connecting plate 33.

[0035] See also Figure 2 and Figure 4In the rail-fixing wheel lifting structure of this embodiment, the connecting shaft 34 is detachably arranged, and the connecting component 3 further includes two first fasteners 35, which are detachably connected to the two ends of the connecting shaft 34, respectively. When the first fastener 35 is connected to the connecting shaft 34, the two first fasteners 35 protrude from the first connecting plate 31 and the third connecting plate 33, respectively; the first limit plate 21 is arranged parallel to the first connecting plate 31, and the third limit plate 23 is arranged parallel to the third connecting plate 33. The first limit plate 21 and the third limit plate 23 are both provided with lifting grooves 26, which are arranged correspondingly to the first fasteners 35. When the threaded rod 41 drives the connecting component 3 to move in the direction close to the fixed plate 1, the first fastener 35 is located in the lifting grooves 26. External threads are arranged at both ends of the connecting shaft 34, and the two first fasteners 35 are nuts. The nuts are threadedly connected to the connecting shaft to realize the detachability of the connecting shaft 34, so as to facilitate the replacement of parts. The nuts at both ends of the connecting shaft 34 protrude from the first connecting plate 31 and the third connecting plate 33. Lifting grooves 26 are provided on the first limiting plate 21 corresponding to the outer side of the first connecting plate 31 and on the third limiting plate 23 corresponding to the outer side of the third connecting plate 33. The positions of the lifting grooves 26 are provided corresponding to the two nuts. The two protruding nuts can move in the lifting grooves 26, providing moving space for the rail-fixing wheel 5 to rise, thereby avoiding obstruction to the lifting and lowering of the rail-fixing wheel 5.

[0036] See also Figure 4 and Figure 5 In the rail-fixing wheel lifting structure of the present embodiment, there are two fixed plates 1, two limiting frames 2, two connecting parts 3, two threaded rods 41 and two rail-fixing wheels 5, respectively. The two fixed plates 1, two limiting frames 2, two connecting parts 3, two threaded rods 41 and two rail-fixing wheels 5 are symmetrically arranged, and the two first connecting plates 31 are provided with connecting pieces 36. The rail-fixing wheel lifting structure further includes a connecting rod 37, and the two ends of the connecting rod 37 are respectively connected to the two connecting pieces 36 to connect the two connecting parts 3. The two fixed plates 1, two limiting frames 2, two connecting parts 3, two threaded rods 41 and two rail-fixing wheels 5 are respectively symmetrically arranged, so that the two first connecting plates 31 are located in the middle of the two rail-fixing wheels 5, and connecting pieces 36 are respectively arranged on the two first connecting plates 31, and the connecting pieces 36 at both ends are connected by a connecting rod 37, so that the two connecting parts 3 are connected, so that the two rail-fixing wheels 5 form a rail-fixing wheel set with the same lifting structure.

[0037] Specifically, the connecting piece 36 is arranged between the lifting groove 26 and the first fastener 35. The lifting groove 26 is a square groove. When the rail-fixing wheel 5 rises, the connecting piece 36 abuts against the bottom of the square groove. In this way, on the one hand, the connecting piece 36 is completely stuck at the bottom of the square groove, thereby ensuring the stability of the lifting structure of the rail-fixing wheel; on the other hand, the first fastener 35 is an irregular shape. If it contacts the lifting groove 26 for a long time, it will cause certain wear to the lifting groove 26. The connecting piece 36 prevents the first fastener 35 from contacting the bottom of the lifting groove 26, thereby avoiding the first fastener 35 from damaging the lifting groove 26.

[0038] See also Figure 4 and Figure 5 In the rail-fixing wheel lifting structure of the present embodiment, the connecting rod 37 is detachably arranged with the two connecting parts 3, the two connecting pieces 36 are respectively provided with first through holes 361, and the two ends of the connecting rod 37 are provided with second through holes 371. The rail-fixing wheel lifting structure further comprises two second fasteners, which are detachably arranged, and the two second fasteners respectively pass through the two ends of the connecting rod 37, the first through hole 361, and the second through hole 371, so as to connect the two connecting parts 3 through the connecting rod 37. The two connecting pieces 36 are respectively provided with first through holes 361 and the second through holes 371 are respectively provided with the two ends of the connecting rod 37, and the two second fasteners respectively pass through the first through holes 361 and the second through holes 371 on both sides of the connecting rod 37 to connect the connecting parts 3 on both sides. The two second fasteners are detachably arranged to facilitate the timely replacement of parts.

[0039] Specifically, the second fastener may be a bolt and a nut used in conjunction with each other, or may be a fastening pin or a buckle, etc.

[0040] See also Figure 6 In the road-rail dual-purpose flatbed vehicle of this embodiment, a fixed frame 6 and a plurality of rubber wheels 7 are included, each of which is fixed on the fixed frame 6, and the rubber wheels 7 are rotatably arranged relative to the fixed frame 6. The road-rail dual-purpose flatbed vehicle also includes the above-mentioned rail-fixing wheel lifting structure, and there are two rail-fixing wheel lifting structures, and the two rail-fixing wheel lifting structures are respectively fixed at the two ends of the fixed frame 6. There are two rail-fixing wheel lifting structures, which are respectively fixed at the front and rear ends of the fixed frame 6. The fixed frame 6 is also provided with a plurality of rubber wheels 7 and a traction hook 61, and the traction device pulls the road-rail dual-purpose flatbed vehicle to move through the traction hook 61. When used as a pure road flatbed vehicle, the threaded rod 41 is rotated to move upward, driving the connecting component 3 to rise, so that the rail-fixing wheel 5 is separated from the track, and pure road driving is realized. When used as a rail vehicle, the threaded rod 41 is rotated to move downward, driving the connecting component 3 to move downward, so that the rail-fixing wheel 5 falls on the track, and the traction device pulls the traction hook 61 to apply a force to the road-rail dual-purpose flatbed vehicle, so as to realize driving on the track.

[0041] See also Figure 5 and Figure 6 In the road-rail dual-purpose flatbed vehicle of the present embodiment, the road-rail dual-purpose flatbed vehicle further includes a crossbeam 8, the two ends of the crossbeam 8 are respectively connected to the two fixed plates 1 of the rail-fixing wheel lifting structure, and the crossbeam 8 is fixed on the fixing frame 6. In order to more firmly set the rail-fixing wheel lifting structure on the fixing frame 6, a crossbeam 8 is set in the middle of the two fixing plates 1, and the crossbeam 8 is fixedly connected to the fixing frame 6, and the fixing surface of the crossbeam 8 and the fixing frame 6 is enlarged, thereby ensuring the firmness of the rail-fixing wheel lifting structure during use. In addition, other equipment can also be placed on the crossbeam 8, such as electric control cabinets, radiators or high-voltage boxes and other related equipment on the road-rail dual-purpose flatbed vehicle, so as to further make full use of the space.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0044] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0045] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0046] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A rail-fixing wheel lifting structure, characterized in that: include: Fixed plate (1); A limiting frame (2), wherein the limiting frame (2) is connected to the fixing plate (1); A connecting component (3), the connecting component (3) is arranged in the limiting frame (2), the connecting component (3) is movably arranged relative to the limiting frame (2), the connecting component (3) and the fixing plate (1) are arranged at a distance, the connecting component (3) is connected to a rail-fixing wheel (5), and the rail-fixing wheel (5) is rotatably arranged relative to the connecting component (3); A threaded rod (41), the threaded rod (41) passes through the fixing plate (1) and is connected to the connecting component (3), the threaded rod (41) is rotatably arranged relative to the fixing plate (1), and the threaded rod (41) is rotated to drive the connecting component (3) to move in the limiting frame (2), thereby driving the rail-fixing wheel (5) to move, so as to adjust the distance between the rail-fixing wheel (5) and the fixing plate (1).

2. The rail-fixing wheel lifting structure according to claim 1, characterized in that: The rail-fixing wheel lifting structure further comprises a driving motor (42), an output end of the driving motor (42) being connected to the threaded rod (41) via a transfer component (43), the driving motor (42) and the transfer component (43) being both arranged on a side of the fixing plate (1) away from the limiting frame (2), the threaded rod (41) being sleeved on the transfer component (43), and the threaded rod (41) being rotatably arranged relative to the transfer component (43); the driving motor (42) drives the threaded rod (41) to move relative to the fixing plate (1).

3. The rail-fixing wheel lifting structure according to claim 1, characterized in that: The limiting frame (2) comprises a first limiting plate (21), a second limiting plate (22), a third limiting plate (23) and a fourth limiting plate (24); the first limiting plate (21), the second limiting plate (22), the third limiting plate (23) and the fourth limiting plate (24) are sequentially connected to form a lifting chamber (25); the threaded rod (41) is rotated to drive the connecting component (3) to move in the lifting chamber (25).

4. The rail-fixing wheel lifting structure according to claim 3, characterized in that: The first limiting plate (21), the second limiting plate (22), the third limiting plate (23) and the fourth limiting plate (24) are respectively perpendicular to the fixing plate (1); The connecting component (3) comprises a first connecting plate (31), a second connecting plate (32) and a third connecting plate (33); the first connecting plate (31), the second connecting plate (32) and the third connecting plate (33) are connected in sequence; the first connecting plate (31) and the third connecting plate (33) are respectively located on two sides of the rail-fixing wheel (5); the threaded rod (41) is connected to the second connecting plate (32); the threaded rod (41) is perpendicular to the second connecting plate (32); and the second connecting plate (32) is parallel to the fixing plate (1).

5. The rail-fixing wheel lifting structure according to claim 4, characterized in that: The connecting component (3) is also provided with a connecting shaft (34), one end of the connecting shaft (34) is connected to the first connecting plate (31), and the other end of the connecting shaft (34) is connected to the third connecting plate (33), the rail-fixing wheel (5) is arranged through the connecting shaft (34), and the rail-fixing wheel (5) is rotatably arranged relative to the connecting shaft (34).

6. The rail-fixing wheel lifting structure according to claim 5, characterized in that: The connecting shaft (34) is detachably arranged, and the connecting component (3) further comprises two first fasteners (35), the two first fasteners (35) are detachably connected to two ends of the connecting shaft (34), respectively, and when the first fasteners (35) are connected to the connecting shaft (34), the two first fasteners (35) are respectively protruded from the first connecting plate (31) and the third connecting plate (33); The first limiting plate (21) is arranged in parallel with the first connecting plate (31), and the third limiting plate (23) is arranged in parallel with the third connecting plate (33). Both the first limiting plate (21) and the third limiting plate (23) are provided with lifting grooves (26), and the lifting grooves (26) are arranged corresponding to the first fastener (35). When the threaded rod (41) drives the connecting component (3) to move in a direction close to the fixing plate (1), the first fastener (35) is located in the lifting groove (26).

7. The rail-fixing wheel lifting structure according to claim 6, characterized in that: The fixing plate (1), the limiting frame (2), the connecting component (3), the threaded rod (41) and the rail-fixing wheel (5) are respectively two, and the two fixing plates (1), the two limiting frames (2), the two connecting components (3), the two threaded rods (41) and the two rail-fixing wheels (5) are respectively arranged symmetrically, and the two first connecting plates (31) are each provided with a connecting piece (36). The rail-fixing wheel lifting structure further comprises a connecting rod (37), and two ends of the connecting rod (37) are respectively connected to the two connecting pieces (36) to connect the two connecting components (3).

8. The rail-fixing wheel lifting structure according to claim 7, characterized in that: The connecting rod (37) is detachably arranged with the two connecting parts (3), the two connecting pieces (36) are respectively provided with a first through hole (361), and both ends of the connecting rod (37) are provided with a second through hole (371). The rail-fixing wheel lifting structure also includes two second fasteners, which are detachably arranged and pass through the two ends of the connecting rod (37), the first through hole (361) and the second through hole (371) respectively, so as to connect the two connecting parts (3) through the connecting rod (37).

9. A road-rail dual-purpose flatbed vehicle, comprising a fixed frame (6) and a plurality of rubber wheels (7), wherein each of the rubber wheels (7) is fixed to the fixed frame (6), and the rubber wheels (7) are rotatably arranged relative to the fixed frame (6), characterized in that: The road-rail dual-purpose flatbed vehicle further comprises a rail-fixing wheel lifting structure as described in any one of claims 1 to 8, wherein there are two rail-fixing wheel lifting structures, and the two rail-fixing wheel lifting structures are respectively fixed at two ends of the fixing frame (6).

10. The road-rail dual-purpose flatbed vehicle according to claim 9, characterized in that: The road-rail dual-purpose flatbed vehicle further comprises a crossbeam (8), the two ends of which are respectively connected to the two fixing plates (1) of the rail-fixing wheel lifting structure, and the crossbeam (8) is fixed on the fixing frame (6).

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