A towed cable car

Abstract

The application discloses a cable truck for cable laying and transportation, and belongs to the technical field of high-speed railway cable laying. The cable truck for cable laying and transportation can realize the position alternation and replacement of the moving wheels and the track wheels through the movement of the wheel group switching assembly, thereby facilitating the cable transportation operation in multiple terrains and expanding the use scene range. In addition, the screw transmission assembly can realize the overturning movement of the driving rotating structure, so that the elastic limiting structure drives the cable reel to be upwardly overturned and kept upright, thereby completing the over-bar operation or obstacle avoidance operation. When the wheel group switching assembly drives the track wheel to keep in the horizontal state, the limiting frame is upwardly loosened from the blocking of the I-shaped plate under the ground force, so that the cable reel laying can be smoothly completed, the release speed of the cable is greatly improved, the protection intensity of the cable is enhanced, the construction cost is saved, the quality is improved, the efficiency is increased, and the cable truck is worthy of being put into use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-speed railway cable laying, in particular to a cable laying vehicle for towing and laying. BACKGROUND

[0002] In the current stage of rapid development of high-speed railway, the amount of railway cable laying increases geometrically, which has the characteristics of large amount of cable, many constraints and various types. The traditional manual laying construction not only has slow construction progress but also needs many workers, resulting in low construction efficiency. In addition, the cable is easily damaged during laying. In addition, there is another way of manual operation combined with a crane. However, some railway tunnels have high requirements, and large cranes cannot realize such complex operations.

[0003] In the laying mode using a cable laying vehicle, a cable laying vehicle suitable for walking on the ground is usually used. However, it is laborious to load the optical cable roll into the cable laying vehicle due to the large self-weight of the optical cable, and generally only single cable laying can be achieved at a time, resulting in low laying efficiency. Moreover, the cable laying vehicle can only walk conveniently on the ground, which makes it inconvenient to walk in some railway tunnels, and the full-line equipment cable carrying equipment cannot be realized due to the influence of the position of the catenary pole. Therefore, it is of great significance to research a cable laying vehicle for towing and laying to solve the above problems. SUMMARY

[0004] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0005] In view of the above and / or existing problems in the cable laying vehicle for towing and laying, the present application is proposed.

[0006] Therefore, the technical problem to be solved by the present application is that due to the large self-weight of the optical cable, it is laborious to load the optical cable roll into the cable laying vehicle, and generally only single cable laying can be achieved at a time, resulting in low laying efficiency. Moreover, the cable laying vehicle can only walk conveniently on the ground, which makes it inconvenient to walk in some railway tunnels, and the full-line equipment cable carrying equipment cannot be realized due to the influence of the position of the catenary pole.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a cable car for drag delivery and release, comprising a bearing base, a wheel group switching assembly is fixedly installed on the bearing base, a threaded transmission assembly is installed on the upper surface of the bearing base, the threaded transmission assembly is respectively rolled on four rotating structures, every two rotating structures are respectively located on the two sides of the threaded transmission assembly, the four rotating structures are fixedly connected on the upper surface of the bearing base, and one side of each bearing base is fixedly connected with an elastic limiting structure, the two sides of the elastic limiting structure are clamped with two I-shaped plates, two cable reels for cable winding are rotatably connected on the two I-shaped plates, and every two cable reels are respectively located on the two sides of the bearing base, a driving assembly is fixedly installed on the lower surface of the bearing base, and the driving assembly is connected with the wheel group switching assembly.

[0008] As a further scheme of the present application: the upper surface of the bearing base and located at the two end edges is connected and fixed with a storage box.

[0009] As a further scheme of the present application: the wheel group switching assembly comprises a bidirectional electric hydraulic rod, the bidirectional electric hydraulic rod is installed through two fixed seats, the two fixed seats are fixedly installed in the inner cavity of the bearing base, the two telescopic ends of the bidirectional electric hydraulic rod are fixedly connected with two tooth plates, the two tooth plates are meshingly connected with two third gears, the two third gears are embeddedly installed in the middle of two rotating shafts, the two rotating shafts penetrate through the bearing base, and the two rotating shafts are rotatably connected on the bearing base through two second bearings.

[0010] As a further scheme of the present application: the two end surfaces of the rotating shaft are fixedly installed with connecting plates, and the four connecting plates are located at the four corners of the bearing base, the connecting plates are rotatably connected with the extension shafts of the track wheels and the moving wheels through fourth bearings, and the track wheels and the moving wheels are respectively located on the upper and lower sides of the connecting plates.

[0011] As a further scheme of the present application: the driving assembly comprises a second motor, the second motor is fixedly installed on the lower surface of the bearing base, the two output shafts of the second motor are rotatably connected on two fixed blocks through fifth bearings, the two fixed blocks are fixedly installed on the lower surface of the bearing base, the two output shafts of the second motor are fixedly connected with two first gears, and the two first gears are meshingly connected with two second gears, wherein the extension shafts of the two track wheels and the two moving wheels are fixedly connected with four second gears.

[0012] As a further scheme of the present application: the threaded transmission assembly comprises a first motor, the first motor is fixedly installed on the upper surface of the bearing base through a connecting piece, the output shaft of the first motor is fixedly connected with a screw rod, the screw rod is rotatably connected on two fixed plates through two first bearings, and the two fixed plates are fixedly installed on the upper surface of the bearing base.

[0013] As a further scheme of the present application: the outer thread of the screw is connected with two nuts, the outer of the two nuts is fixedly connected with a fixing frame, the upper and lower positions of the U-shaped opening at both ends of the fixing frame are fixedly connected with a ball.

[0014] As a further scheme of the present application: the rotating structure comprises a roller body, the roller body is rotatably connected to two support plates through two third bearings, the two support plates are fixedly connected to the upper surface of the bearing base, the outer of the roller body and along the length of the roller body is provided with a spiral track, and each two balls are rolled on the two surfaces of the two spiral tracks.

[0015] As a further scheme of the present application: the elastic limiting structure comprises a connecting frame, one end surface of the connecting frame is fixedly connected with the roller body, and the two end surfaces below the connecting frame are fixedly connected with a limiting frame, the limiting frame penetrates through the two end surfaces below the connecting frame, the limiting frame penetrates and slides in the limiting frame, one end surface of the limiting frame is located at the opening position of the limiting frame and blocks the work-shaped plate, the work-shaped plate is embedded in the opening of the limiting frame, the upper and lower surfaces of the opening of the limiting frame are fixedly connected with protrusions, the work-shaped plate slides on the two protrusions, and a spring is fixedly connected between the lower surface of the limiting frame and the limiting frame.

[0016] Compared with the prior art, the beneficial effects of the present application are that: the cable car for towing and releasing can realize the position alternation and replacement of the moving wheels and the track wheels through the wheel set switching assembly, thereby facilitating the cable transportation operation in multiple terrains and expanding the use scene range, and the thread transmission assembly can realize the overturning movement of the driving rotating structure, so that the elastic limiting structure drives the cable reel to overturn upward and keep vertical, thereby completing the pole passing or obstacle avoidance operation, and when the wheel set switching assembly drives the track wheel to keep horizontal, the limiting frame is loosened upward to block the work-shaped plate, at this time, the cable reel can be smoothly laid, thereby greatly improving the release speed of the cable, enhancing the protection of the cable, saving the construction cost, achieving the purpose of improving quality and efficiency, and being worthy of use. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Among them:

[0018] Figure 1 The embodiment of the present application provides a three-dimensional structure schematic diagram of a cable car for towing and releasing.

[0019] Figure 2A three-dimensional structural schematic view of a wheel group switching assembly in a cable car for hauling and releasing lines according to the embodiment provided by the present application.

[0020] Figure 3 A three-dimensional structural schematic view of a bearing base in a cable car for hauling and releasing lines according to the embodiment provided by the present application.

[0021] Figure 4 A three-dimensional structural schematic view of a screw transmission assembly in a cable car for hauling and releasing lines according to the embodiment provided by the present application.

[0022] Figure 5 A three-dimensional structural schematic view of an elastic limiting structure in a cable car for hauling and releasing lines according to the embodiment provided by the present application.

[0023] Figure 6 A three-dimensional structural schematic view of a rotating structure in a cable car for hauling and releasing lines according to the embodiment provided by the present application.

[0024] Figure 7 A three-dimensional structural schematic view of a cable reel in a cable car for hauling and releasing lines according to the embodiment provided by the present application.

[0025] In the figure: 1 bearing base, 2 cable reel, 3 elastic limiting structure, 31 connecting frame, 32 limiting frame, 33 convex strip, 34 spring, 35 limiting frame, 4 storage box, 5 I-shaped plate, 6 screw transmission assembly, 61 first motor, 62 fixed plate, 63 nut, 64 fixed frame, 65 screw rod, 66 ball, 67 first bearing, 7 driving assembly, 71 second motor, 72 first gear, 8 wheel group switching assembly, 81 bidirectional electric hydraulic rod, 82 fixed seat, 83 third gear, 84 toothed plate, 85 rotating shaft, 86 second bearing, 87 connecting plate, 88 track wheel, 89 moving wheel, 810 second gear, 9 rotating structure, 91 supporting plate, 92 third bearing, 93 roller, 94 spiral track. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be practiced in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0028] Secondly, the present application is described in detail in combination with the schematic view, in the detailed description of the embodiments of the present application, for the convenience of description, the cross-sectional view of the device structure will be partially enlarged without the general proportion, and the schematic view is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0029] Thirdly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.

[0030] Embodiment 1

[0031] As Figures 1-2 shown, the present application provides a technical solution: a towing delivery cable car, comprising a bearing base 1, the upper surface of the bearing base 1 and the two end edges are connected and fixed with a storage box 4, the bearing base 1 is fixedly installed with a wheel group switching assembly 8, the upper surface of the bearing base 1 is installed with a threaded transmission assembly 6, the threaded transmission assembly 6 is rolled on four rotating structures 9 respectively, every two rotating structures 9 are located on the two sides of the threaded transmission assembly 6 respectively, and the four rotating structures 9 are fixedly connected on the upper surface of the bearing base 1, and one side of each bearing base 1 is fixedly connected with a elastic limiting structure 3, the two sides of the elastic limiting structure 3 are clamped with an I-shaped plate 5, two I-shaped plates 5 are rotatably connected with a cable reel 2 for cable winding, and every two cable reels 2 are located on the two sides of the bearing base 1, the lower surface of the bearing base 1 is fixedly installed with a driving assembly 7, and the driving assembly 7 is connected between the wheel group switching assembly 8;

[0032] The wheel group switching assembly 8 comprises a bidirectional electric hydraulic rod 81, the bidirectional electric hydraulic rod 81 is installed through two fixed seats 82, the two fixed seats 82 are fixedly installed in the inner cavity of the bearing base 1, and the two telescopic ends of the bidirectional electric hydraulic rod 81 are fixedly connected with two toothed plates 84, the two toothed plates 84 are meshingly connected with two third gears 83, the two third gears 83 are embeddedly installed in the middle of two shafts 85, the two shafts 85 penetrate through the bearing base 1, and the two shafts 85 are rotatably connected on the bearing base 1 through two second bearings 86, the two end faces of the shaft 85 are fixedly installed with a connecting plate 87, and the four connecting plates 87 are located at the four corners of the bearing base 1, the connecting plate 87 is rotatably connected with the extension shaft of the rail wheel 88 and the moving wheel 89 through the fourth bearing, and the rail wheel 88 and the moving wheel 89 are located on the upper and lower sides of the connecting plate 87 respectively.

[0033] In this embodiment, when the switching use scene is carried out, the meshing transmission between the toothed plate 84 and the third gear 83 can be controlled through the extension and retraction movement of the bidirectional electric hydraulic rod 81, so that the connecting plate 87 can be rotated by the rotating shaft 85, and then the positions of the track wheels 88 and the moving wheels 89 can be alternately changed, thereby switching different wheel groups, so that the track wheels 88 can be applied to the construction site with a track, and the moving wheels 89 can be moved on the ground, thereby increasing the use scene of the device and improving the use range in multiple occasions.

[0034] Secondly, the storage box 4 can store construction tools or articles, which is convenient for carrying and using during the cable laying process. The cable reel 2 can wind the cable, which is convenient for winding the cable and ensures the orderly placement of the cable to avoid disorder. The fixing seat 82 can install and fix the bidirectional electric hydraulic rod 81. The second bearing 86 can support the rotating shaft 85 and assist the stable rotation movement of the rotating shaft 85.

[0035] Embodiment 2

[0036] In combination with the accompanying drawings Figures 2-3 and the accompanying drawings Figures 6-7 It is concluded that the wheel group switching assembly 8 comprises a bidirectional electric hydraulic rod 81, the bidirectional electric hydraulic rod 81 penetrates and is installed on two fixing seats 82, the two fixing seats 82 are fixedly installed in the inner cavity of the bearing base 1, and the two extension ends of the bidirectional electric hydraulic rod 81 are fixedly connected with two toothed plates 84, respectively. The two toothed plates 84 are meshingly connected with two third gears 83, respectively. The two third gears 83 are embeddedly installed in the middle parts of two rotating shafts 85. The two rotating shafts 85 penetrate the bearing base 1 and are rotatably connected to the bearing base 1 through two second bearings 86. The two end faces of the rotating shaft 85 are fixedly installed with connecting plates 87, respectively. The four connecting plates 87 are located at the four corners of the bearing base 1. The connecting plates 87 are rotatably connected with the extension shafts of the track wheels 88 and the moving wheels 89 through fourth bearings. The track wheels 88 and the moving wheels 89 are located on the upper and lower sides of the connecting plates 87, respectively. The driving assembly 7 comprises a second motor 71, which is fixedly installed on the lower surface of the bearing base 1. The two output shafts of the second motor 71 are rotatably connected to two fixing blocks through fifth bearings. The two fixing blocks are fixedly installed on the lower surface of the bearing base 1. The two output shafts of the second motor 71 are fixedly connected with two first gears 72, respectively. The two first gears 72 are meshingly connected with two second gears 810, respectively. The extension shafts of the two track wheels 88 and the two moving wheels 89 are fixedly connected with four second gears 810, respectively.

[0037] In this embodiment: when laying the cable, the first gear 72 can be driven to rotate by the second motor 71, so that the first gear 72 meshes with the second gear 810 to drive the rail wheel 88 or the moving wheel 89 to roll, thereby achieving the operation of laying the cable, improving the convenience and safety of the operation, and reducing the difficulty of laying the cable. Secondly, the bidirectional electric hydraulic rod 81 extends and retracts, so that the toothed plate 84 meshes with the third gear 83 to drive the shaft 85 to drive the rail wheel 88 and the moving wheel 89 to keep horizontal through the connecting plate 87. At this time, the limiting frame 35 can contact the ground downward, and the spring 34 is compressed downward by the gravity of the cable reel 2, so that the limiting frame 35 is pulled out of the opening of the limiting frame 32 upward. Due to the slight inclination design of the opening of the limiting frame 32, the work plate 5 can smoothly exit the opening of the limiting frame 32, which facilitates the laying of the cable, and the whole cable laying operation is relatively simple and convenient.

[0038] Embodiment 3

[0039] Combined with the attached Figures 4-6 It is concluded that the threaded transmission assembly 6 includes a first motor 61 fixedly installed on the upper surface of the bearing base 1 through a connecting piece. The output shaft of the first motor 61 is fixedly connected with a screw rod 65. The screw rod 65 is rotatably connected with two fixed plates 62 through two first bearings 67. The two fixed plates 62 are fixedly installed on the upper surface of the bearing base 1. The screw rod 65 is externally threaded connected with two nuts 63. The two nuts 63 are both fixedly connected with a fixed frame 64. The upper and lower positions of the U-shaped openings at both ends of the fixed frame 64 are both fixedly connected with a plurality of ball bearings 66.

[0040] The rotating structure 9 includes a roller body 93 rotatably connected with two support plates 91 through two third bearings 92. The two support plates 91 are fixedly connected with the upper surface of the bearing base 1. The outer surface of the roller body 93 is provided with a spiral track 94 along the length of the roller body 93. Every two ball bearings 66 are rolled on the two surfaces of the two spiral tracks 94, respectively. The elastic limiting structure 3 includes a connecting frame 31 fixedly connected between one end surface of the connecting frame 31 and the roller body 93. The two end surfaces below the connecting frame 31 are both fixedly connected with a limiting frame 32. The two end surfaces below the connecting frame 31 are both penetrated by a limiting frame 35. The limiting frame 35 is slidably penetrated in the limiting frame 32. One end surface of the limiting frame 35 is located at the opening position of the limiting frame 32 and blocks the work plate 5. The work plate 5 is embedded in the opening of the limiting frame 32. The upper and lower surfaces of the opening of the limiting frame 32 are both fixedly connected with a protruding strip 33. The work plate 5 is slidably connected with the two protruding strips 33. The lower surface of the limiting frame 32 and the limiting frame 35 are both fixedly connected with a spring 34.

[0041] In this embodiment: when the cable collecting disc 2 encounters the catenary pole, the first motor 61 drives the screw rod 65 to rotate the nut 63, so that the nut 63 drives the fixed frame 64 and the ball 66 to move. Since the ball 66 is attached to the two sides of the spiral track 94, it can be connected with the spiral track 94. In addition, the ball 66 can reduce the friction between the spiral track 94, making the operation more smooth. Furthermore, the movement of the ball 66 can drive the spiral track 94 and the roller body 93 to rotate, so that the roller body 93 can drive the elastic limiting structure 3 and the cable collecting disc 2 to overturn upward and keep the vertical state, which can ensure the smooth passing of the cable collecting disc 2, avoid the influence of the catenary pole on the passing of the cable collecting disc 2, facilitate the full-line cable laying, and then the convex strip 33 can correspond to the notch of the I-shaped plate 5, so that the I-shaped plate 5 slides into the convex strip 33 to limit the I-shaped plate 5, avoid the I-shaped plate 5 from being out of the opening of the limiting frame 32, and release the elastic force of the spring 34, which can drive the limiting frame 35 to be attached to the opening of the limiting frame 32 downward, thereby blocking the I-shaped plate 5 and playing the role of automatic positioning of the cable collecting disc 2. In addition, the threads on one side of the two spiral tracks 94 and the screw rod 65 and the threads on the other side of the other two spiral tracks 94 and the screw rod 65 are arranged in opposite directions, thereby ensuring that the subsequent movement can control the movement of the cable collecting disc 2 in the same direction.

[0042] The working principle of the present application is that: when laying the cable, first, according to the terrain, control the extension and retraction movement of the bidirectional electric hydraulic rod 81, so that the bidirectional electric hydraulic rod 81 can control the gear plate 84 to move, so that the gear plate 84 drives the third gear 83 to rotate, so that the third gear 83 drives the rotating shaft 85 to rotate, so that the connecting plate 87 rotates, so that the rail wheel 88 and the moving wheel 89 rotate, so that the position of the rail wheel 88 and the moving wheel 89 is alternately changed, so that the rail wheel 88 can be used on the railway track, and the moving wheel 89 can be used on the ordinary road surface. When the rail wheel 88 and the moving wheel 89 are switched and kept horizontal, the height of the bearing base 1 is lowered at this time, and the limiting frame 35 contacts the ground and is compressed by the spring 34 under the influence of gravity, so that the limiting frame 35 is pulled out of the opening of the limiting frame 32, and the work plate 5 is correspondingly placed in the opening of the limiting frame 32 at this time. When the rail wheel 88 and the moving wheel 89 are switched and the supporting work is completed, the limiting frame 35 is not affected by the ground force at this time, and the spring 34 drives the limiting frame 35 to reset downward, so that the limiting frame 35 is located in the opening of the limiting frame 32, and then the work plate 5 can be blocked, and then the second motor 71 can be controlled to rotate, so that the second motor 71 can control the first gear 72 to rotate, so that the first gear 72 drives the second gear 810 to rotate, so that the second gear 810 drives the corresponding rail wheel 88 or moving wheel 89 to roll, so that the device can realize displacement movement. When the obstacle or the contact net rod is contacted with the cable reel 2, the first motor 61 is controlled to rotate the screw 65 at this time, so that the two nuts 63 are driven to move by the screw 65, so that the two fixed frames 64 and the ball 66 are driven to move by the two nuts 63, so that the ball 66 moves along the spiral track 94, and the ball 66 extrudes the spiral track 94 to drive the roller 93 and the elastic limiting structure 3 to overturn, so that the cable reel 2 is kept upright upward at this time. Then control the second motor 71 to reverse, so that the cable reel 2 can be restored when the cable is laid, and then control the bidirectional electric hydraulic rod 81 to drive the gear plate 84 to engage and drive when the rail wheel 88 is kept horizontal. At this time, the limiting frame 35 is forced to be pulled out of the opening upward, and the work plate 5 can smoothly get out of the opening under the influence of the gravity of the cable reel 2, and the cable reel 2 is lowered. At this time, a new cable reel 2 can be loaded to lay the cable again.

[0043] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications can be made to the embodiments without departing from the spirit and scope of the application, as described in the claims (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc. and the like). For example, the position of elements can be reversed or otherwise varied and the nature or number of elements can be altered or varied. Accordingly, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be varied or re-sequenced without departing from the spirit of the application. Any "apparatus" or "device" described herein can be embodied in many different forms and a "means" for performing any function described herein can include any of the apparatus or structures described herein. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present application. Accordingly, the present application is not limited to the particular embodiments described in the specification.

[0044] In addition, for purposes of brevity of description, it is not the intention of the

[0045] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts can undoubtedly be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0046] It should be noted that the above-mentioned embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the present application, and all should be included in the scope of the claims of the present application.

Claims

1. A cable-laying vehicle, characterized in that: The system includes a support base (1), on which a wheel switching assembly (8) is fixedly installed. A threaded transmission assembly (6) is installed on the top of the support base (1). The threaded transmission assembly (6) rolls on four rotating structures (9). Each pair of rotating structures (9) is located on both sides of the threaded transmission assembly (6), and the four rotating structures (9) are fixedly connected to the top of the support base (1). Each side of the support base (1) is fixedly connected to an elastic limiting structure (3). I-beams are engaged on both sides of the elastic limiting structure (3), and cable winding reels (2) for cable winding are rotatably connected to the two I-beams. And each pair of cable reels (2) are located on both sides of the support base (1). A drive assembly (7) is fixedly installed on the bottom of the support base (1). The drive assembly (7) is connected to the wheel set switching assembly (8). The threaded transmission assembly (6) includes a first motor (61). The first motor (61) is fixedly installed on the support base (1) through a connector. The output shaft of the first motor (61) is fixedly connected to a screw (65). The screw (65) is rotatably connected to two fixed plates (62) through two first bearings (67). The two fixed plates (62) are fixedly installed on the support base (1). The screw (65) has two nuts (63) connected to its external thread. Each of the two nuts (63) is fixedly connected to a fixing bracket (64). Ball bearings (66) are fixedly connected to the upper and lower positions of the U-shaped openings at both ends of the fixing bracket (64). The rotating structure (9) includes a roller (93), which is rotatably connected to two support plates (91) via two third bearings (92). The two support plates (91) are fixedly connected to the top of the support base (1). A spiral track (94) is installed on the outside of the roller (93) and along the length of the roller (93). Two balls (66) roll on the two sides of the two spiral tracks (94) respectively. The elastic limiting structure (3) includes a connecting frame (31), one end face of the connecting frame (31) is fixedly connected to the roller body (93), and both ends of the connecting frame (31) are fixedly connected to a limiting frame (32). A limiting frame (35) passes through both ends of the connecting frame (31), and the limiting frame (35) slides through the limiting frame (32). One end face of the limiting frame (35) is located at the opening of the limiting frame (32) and blocks the I-shaped plate. The I-shaped plate is embedded in the opening of the limiting frame (32). The upper and lower sides of the opening of the limiting frame (32) are fixedly connected to protrusions (33). The I-shaped plate slides on the two protrusions (33), and a spring (34) is fixedly connected between the lower part of the limiting frame (32) and the limiting frame (35).

2. The cable-laying vehicle as described in claim 1, characterized in that: Storage boxes (4) are fixedly connected to the top of the support base (1) and located at both ends.

3. The cable-laying vehicle as described in claim 1, characterized in that: The wheel set switching assembly (8) includes a bidirectional electro-hydraulic rod (81), which is installed through two fixed seats (82). The two fixed seats (82) are fixedly installed in the inner cavity of the bearing base (1). The two telescopic ends of the bidirectional electro-hydraulic rod (81) are fixedly connected to two toothed plates (84) respectively. The two toothed plates (84) are meshed with two third gears (83) respectively. The two third gears (83) are respectively embedded in the middle of two rotating shafts (85). The two rotating shafts (85) penetrate the bearing base (1) and are rotatably connected to the bearing base (1) through two second bearings (86).

4. The cable-laying vehicle as described in claim 3, characterized in that: Connecting plates (87) are fixedly installed on both ends of the rotating shaft (85), and the four connecting plates (87) are located at the four corners of the bearing base (1). The connecting plates (87) are rotatably connected to the extension shafts of the rail wheel (88) and the moving wheel (89) through the fourth bearing, and the rail wheel (88) and the moving wheel (89) are located on the upper and lower sides of the connecting plate (87) respectively.

5. The cable-laying vehicle as described in claim 4, characterized in that: The drive assembly (7) includes a second motor (71), which is fixedly installed under the support base (1). The two output shafts of the second motor (71) are rotatably connected to two fixed blocks through a fifth bearing. The two fixed blocks are fixedly installed under the support base (1). The two output shafts of the second motor (71) are fixedly connected to two first gears (72) respectively. The two first gears (72) are meshed with two second gears (810) respectively. The extension shafts of two rail wheels (88) and two moving wheels (89) are fixedly connected to four second gears (810) respectively.

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