Towing arrangement

Abstract

The utility model discloses a drag traction device, including scene simulation device, drive mechanism, support mechanism, drive mechanism, telescopic mechanism and locking mechanism, scene simulation device is rectangular structure and is left -right structure parallel arrangement, the length of left and right sides scene simulation device is less than the scene simulation device of middle, drive mechanism sets up inside the of scene simulation device, support mechanism sets up inside the of scene simulation device, drive mechanism sets up on, telescopic mechanism sets up on drive mechanism, locking mechanism sets up on telescopic mechanism. This scheme passes through sinking type track constraint, tension type power transmission, modularization locking mechanism, double electric cylinder differential telescopic + magnetic attraction type lane change locking and modularization scene design, makes up the short board of prior art, has the remarkable application value and competitive advantage in many fields.

Description

Technical Field

[0001] This utility model relates to the field of traffic scenario technology, specifically to a towing device. Background Technology

[0002] The core function of a towing traction device is to provide traction force through mechanical, electric, or hydraulic means to achieve precise displacement, handling, or trajectory simulation of a target object. It is widely used in industrial automation (such as material conveying on assembly lines), traffic simulation (such as the motion simulation of fake targets in autonomous driving tests), logistics and warehousing (such as cargo sorting and handling) and other fields to complete the fixed-point movement of loads, trajectory reproduction, or multi-scenario action simulation.

[0003] Existing towing devices have several shortcomings: Firstly, the basic traction structure lacks a sunken track to constrain the shuttle car, resulting in poor longitudinal traction stability and accuracy. Simulated objects are prone to swaying and falling off at high speeds or high accelerations, making it difficult to achieve a trajectory accuracy of ±0.3m and a speed accuracy of ±1.0km / h. Furthermore, the fixed load-bearing structure makes it poorly adaptable to various types of false targets such as pedestrians and bicycles, requiring frequent modifications during replacement. Secondly, lateral lane-changing devices lack the ability to coordinate longitudinal and lateral lane changes, only capable of longitudinal towing. They cannot simulate realistic lane changes involving "longitudinal travel + lateral offset." The lack of a turning point and sway adjustment point leads to distorted lane-changing trajectories. Additionally, the lack of a dedicated telescopic mechanism makes it difficult to meet lateral speed and acceleration requirements of 0-4.0m / s² and ≥3.0m / s², respectively. 2 The requirements are not coordinated with the longitudinal movement, and the trajectory becomes disordered after superposition.

[0004] Therefore, a solution is needed. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the prior art, the present invention provides a towing device to solve the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A towing device includes a scene simulation device, a drive mechanism, a support mechanism, a driving mechanism, a telescopic mechanism, and a locking mechanism. The scene simulation device has a rectangular structure and is arranged in parallel with the middle and center sides. The length of the scene simulation devices on the left and right sides is shorter than that of the middle scene simulation device. The drive mechanism is located inside the scene simulation device, the support mechanism is located inside the scene simulation device, the driving mechanism is located on the drive mechanism, the telescopic mechanism is located on the driving mechanism, and the locking mechanism is located on the telescopic mechanism.

[0010] The drive mechanism includes a track, a drive groove, a rotary groove, a motor, a first rotating shaft, a first turntable, a base, a first bearing, a second rotating shaft, a second turntable, a cam shaft, a first rack, a timing belt, and a second rack. The track has a waist-shaped structure and is recessed downwards at the top of each scene simulation device. The drive groove and rotary groove are recessed and opposite to each other at the bottom of the two ends of the track. The motor is located at the bottom of the drive groove. The first rotating shaft is located at the top of the motor. The first turntable is located at the top of the first rotating shaft. The base is located at the bottom of the rotary groove. The first bearing is located at the top of the base. The second rotating shaft is located in the inner ring of the first bearing and extends upwards. The second turntable is located at the top of the second rotating shaft. The cam shafts are respectively located at the top of the first turntable and the second turntable. The first rack is evenly circumferentially arranged on the outer wall of each cam shaft. The timing belt has a waist-shaped structure and is located between the two cam shafts and at the top. The second rack is evenly arranged at the top and bottom of the timing belt.

[0011] Preferably, the first rotating shaft and the first turntable are integrally formed, the second rotating shaft and the second turntable are integrally formed, the bottom of the second rotating shaft is connected to the inner ring of the first bearing by an interference fit, the length of the second rack is less than one-third of the first rack, the height of the second rack is less than the height of the cam shaft, the height of the cam shaft is equal to the sum of the height of the second rack below and the thickness of the timing belt, the upper half of the cam shaft can abut against the inner circumference of one end of the timing belt, the cam shaft and the first rack are integrally formed, and the timing belt and the second rack are integrally formed.

[0012] Preferably, the support mechanism includes wheel grooves, support rods, bearings, support wheels, and racks. The wheel grooves are recessed laterally at equal intervals at the bottom of the track and are all located at the bottom of the lateral portion of the timing belt. The support rods are disposed in the middle of the interior of each wheel groove. Each bearing is disposed around each support rod. Each support wheel is disposed around each bearing. The racks are disposed evenly circumferentially on the outer wall of each support wheel.

[0013] Preferably, the wheel groove has a square structure, and the support wheel and rack are integrally formed.

[0014] Preferably, the driving mechanism includes a shuttle car, a limiting groove plate, a bearing three, and a fixing column. The shuttle car is disposed at the top of each synchronous belt and inside the track. The limiting groove plate is disposed at the left and right ends of the bottom of the shuttle car. The bearing three is disposed at the middle of the bottom of each limiting groove plate. The fixing column is disposed inside each bearing three.

[0015] Preferably, the top of the shuttle is higher than the top of the scene simulation device, the longitudinal section of the limiting groove plate has a U-shaped structure, the fixing column and the shuttle are integrally formed, and the fixing column is installed in the inner ring of the bearing three by interference fit.

[0016] Preferably, the telescopic mechanism includes a telescopic box, a telescopic groove, an electric cylinder, a telescopic chain, a connecting plate, and a magnetic plate. The telescopic box is disposed on the top of each shuttle car, the telescopic groove is disposed on the left and right halves of each telescopic box, the electric cylinder is disposed at the inner end of each telescopic groove and located inside the telescopic box, the telescopic chain is disposed at the output end of each electric cylinder, the connecting plate is disposed at the output end of each telescopic chain, and the magnetic plate is disposed at the end of each connecting plate away from the telescopic chain.

[0017] Preferably, the opening of the telescopic groove in the left half faces the front end, and the opening of the telescopic groove in the right half faces the rear end.

[0018] Preferably, the locking mechanism includes a locking plate, a locking groove, an energized groove, a partition, a metal plate, an electric motor, an electromagnetic coil, and mounting holes. The locking plate is disposed inside each of the telescopic grooves. The locking grooves are disposed in the front and rear halves of the interior of each locking plate. The energized groove is disposed between the front and rear locking grooves. The partitions are respectively disposed between the energized groove and the two locking grooves. The metal plate is disposed at one end of each partition away from the other partition. The electric motor is disposed inside the energized groove. The electromagnetic coil is disposed at both ends of the electric motor and passes through the partitions and extends into the interior of each metal plate.

[0019] Preferably, the locking plate has a cuboid structure, the locking groove is located in the lower half of the locking plate, and the height of the power-conducting groove is higher than the height of the locking groove.

[0020] (III) Beneficial Effects

[0021] This utility model provides a towing device. It has the following beneficial effects:

[0022] 1. The sunken track and tension linkage drive structure greatly improve traction stability and accuracy, meeting the requirements of ±0.3m track accuracy and ±1.0km / h speed accuracy.

[0023] 2. The modular locking design with locking plate and mounting holes is compatible with multiple types of dummy targets and is easy to replace, reducing maintenance costs.

[0024] 3. The dual electric cylinder differential extension and magnetic locking mechanism enables true longitudinal and lateral lane changes, meeting lateral speed and acceleration requirements with precise trajectory.

[0025] 4. The left-center-right parallel modular scene simulation device can flexibly expand the track length to adapt to different scales of scenes in multiple fields. Attached Figure Description

[0026] Figure 1 This is a top view of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the support wheel structure of this utility model;

[0028] Figure 3 This is a schematic diagram of the drive mechanism structure of this utility model;

[0029] Figure 4 This is a side view of the shuttle car and telescopic mechanism of this utility model;

[0030] Figure 5 This is a schematic diagram of the bottom structure of the shuttle car of this utility model;

[0031] Figure 6 This is a detailed structural diagram of the telescopic mechanism of this utility model;

[0032] Figure 7 This is a schematic diagram of the locking mechanism of this utility model.

[0033] In the diagram: 1-Scene simulation device; 2-Drive mechanism; 21-Rail; 22-Drive groove; 23-Rotating groove; 24-Motor; 25-Shaft 1; 26-Turntable 1; 27-Base; 28-Bearing 1; 29-Shaft 2; 210-Turntable 2; 211-Cam shaft; 212-Rack 1; 213-Synchronous belt; 214-Rack 2; 3-Support mechanism; 31-Wheel groove; 32-Support rod; 33-Bearing 2; 34-Support wheel; 35-Rack and pinion three; 4-Drive mechanism; 41-Shuttle car; 42-Limiting groove plate; 43-Bearing three; 44-Fixing column; 5-Telescopic mechanism; 51-Telescopic box; 52-Telescopic groove; 53-Electric cylinder; 54-Telescopic chain; 55-Connecting plate; 56-Magnetic plate; 6-Locking mechanism; 61-Locking plate; 62-Locking groove; 63-Electrifying groove; 64-Partition plate; 65-Metal plate; 66-Electrifying motor; 67-Electromagnetic coil; 68-Mounting hole. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figure 1-7This utility model embodiment provides a technical solution to achieve this: it includes a scene simulation device 1, a driving mechanism 2, a supporting mechanism 3, a driving mechanism 4, a telescopic mechanism 5, and a locking mechanism 6. The scene simulation device 1 has a rectangular structure and is arranged in parallel with the left, middle, and right sides. The length of the scene simulation devices 1 on the left and right sides is less than that of the scene simulation device 1 in the middle. The driving mechanism 2 is located inside the scene simulation device 1, the supporting mechanism 3 is located inside the scene simulation device 1, the driving mechanism 4 is located on the driving mechanism 2, the telescopic mechanism 5 is located on the driving mechanism 4, and the locking mechanism 6 is located on the telescopic mechanism 5.

[0036] The drive mechanism 2 includes a track 21, a drive groove 22, a rotary groove 23, a motor 24 (model: HF-KP23J-S100), a first rotating shaft 25, a first turntable 26, a base 27, a first bearing 28, a second rotating shaft 29, a second turntable 210, a cam shaft 211, a first rack 212, a synchronous belt 213, and a second rack 214. The track 21 has a waist-shaped structure and is recessed downwards at the top of each scene simulation device 1. The drive groove 22 and the rotary groove 23 are recessed and opposite to each other at the bottom of the two ends of the track 21. The motor 24 is located at the bottom of the drive groove 22, and the first rotating shaft 25 is located at the bottom of the motor. At the top of 24, turntable 26 is set at the top of rotating shaft 25, base 27 is set at the bottom of rotary groove 23, bearing 28 is set at the top of base 27, rotating shaft 29 is set in the inner ring of bearing 28 and extends upward, turntable 210 is set at the top of rotating shaft 29, cam shaft 211 is set at the top of turntable 26 and turntable 210 respectively, rack 212 is evenly circumferentially set on the outer wall of each cam shaft 211, synchronous belt 213 is set in a waist-shaped structure between the two cam shafts 211 and at the top, and rack 214 is evenly set at the top and bottom of synchronous belt 213.

[0037] In detail, the first shaft 25 and the first turntable 26 are integrally formed, the second shaft 29 and the second turntable 210 are integrally formed, the bottom of the second shaft 29 is connected to the inner ring of the first bearing 28 by interference fit, the length of the second rack 214 is less than one-third of the length of the first rack 212, the height of the second rack 214 is less than the height of the cam shaft 211, the height of the cam shaft 211 is equal to the sum of the height of the second rack 214 below and the thickness of the synchronous belt 213, the upper part of the cam shaft 211 can abut against the inner circumference of one end of the synchronous belt 213, the cam shaft 211 and the first rack 212 are integrally formed, and the synchronous belt 213 and the second rack 214 are integrally formed.

[0038] The support mechanism 3 includes wheel grooves 31, support rods 32, bearings 33, support wheels 34, and racks 35. The wheel grooves 31 are recessed laterally at equal intervals at the bottom of the track 21 and are all located at the bottom of the lateral portion of the synchronous belt 213. The support rods 32 are located in the middle of the interior of each wheel groove 31. Each support rod 33 is wrapped around each support rod 32. Each support wheel 34 is wrapped around each bearing 33. The racks 35 are evenly circumferentially arranged on the outer wall of each support wheel 34.

[0039] The wheel groove 31 has a square structure, and the support wheel 34 and rack 35 are integrally formed.

[0040] The driving mechanism 4 includes a shuttle car 41, a limiting groove plate 42, a bearing 3 43, and a fixing column 44. The shuttle car 41 is located at the top of each synchronous belt 213 and inside the track 21. The limiting groove plate 42 is located at the left and right ends of the bottom of the shuttle car 41. The bearing 3 43 is located in the middle of the bottom of each limiting groove plate 42. The fixing column 44 is located inside each bearing 3 43.

[0041] The top of the shuttle 41 is higher than the top of the scene simulation device 1. The longitudinal section of the limiting groove plate 42 is U-shaped. The fixing column 44 and the shuttle 41 are integrally formed. The fixing column 44 is installed in the inner ring of the bearing 3 43 by interference fit.

[0042] The telescopic mechanism 5 includes a telescopic box 51, a telescopic groove 52, an electric cylinder 53 (model: MC-HP-40-500), a telescopic chain 54, a connecting plate 55, and a magnetic plate 56. The telescopic box 51 is located on the top of each shuttle car 41. The telescopic groove 52 is located on the left and right halves of each telescopic box 51. The electric cylinder 53 is located at the inner end of each telescopic groove 52 and inside the telescopic box 51. The telescopic chain 54 is located at the output end of each electric cylinder 53. The connecting plate 55 is located at the output end of each telescopic chain 54. The magnetic plate 56 is located at the end of each connecting plate 55 away from the telescopic chain 54.

[0043] The opening of the telescopic groove 52 in the left half faces the front end, and the opening of the telescopic groove 52 in the right half faces the rear end.

[0044] The locking mechanism 6 includes a locking plate 61, a locking groove 62, an electrified groove 63, a partition 64, a metal plate 65, an electric motor 66 (model: E-941SA-1200), an electromagnetic coil 67, and a mounting hole 68. The locking plate 61 is disposed inside each telescopic groove 52. The locking groove 62 is disposed in the front and rear halves of the interior of each locking plate 61. The electrified groove 63 is disposed between the front and rear locking grooves 62. The partition 64 is disposed between the electrified groove 63 and the two locking grooves 62 respectively. The metal plate 65 is disposed at one end of each partition 64 away from the other partition 64. The electric motor 66 is disposed inside the electrified groove 63. The electromagnetic coil 67 is disposed at both ends of the electric motor 66 and passes through the partition 64 and extends into the interior of each metal plate 65.

[0045] The locking plate 61 has a cuboid structure, the locking groove 62 is located in the lower half of the locking plate 61, and the height of the power-conducting groove 63 is higher than the height of the locking groove 62.

[0046] Solution Analysis:

[0047] I. Significantly improved traction stability and accuracy

[0048] The system employs a combination structure of a sunken track 21 and support wheels 34. The track has a waist-shaped concave design, and the shuttle car 41 is embedded in the track through a limiting groove plate 42. The support wheels 34 are evenly distributed at the bottom of the track, providing support and lateral constraint for the synchronous belt 213 and the shuttle car 41. This structure effectively solves the problem of simulated objects swaying and falling off during longitudinal traction in existing technologies. It can maintain stability even at high speeds and high accelerations, achieving high standards of track accuracy of ±0.3m and speed accuracy of ±1.0km / h.

[0049] The drive end adopts a tension linkage design of turntable 26 and turntable 210. Turntable 26 is driven by motor 24, and turntable 210 is assisted in rotating by bearing 28, which ensures that the synchronous belt 213 is always taut in the track, and the power transmission is slip-free, which further ensures the stability and speed accuracy of traction.

[0050] II. High adaptability to various types of decoys, easy to replace.

[0051] The locking mechanism 6, through its modular design of locking plate 61 and mounting holes 68, can be adapted to various types of decoys, such as pedestrians, bicycles, and vehicles. The decoys are directly fixed to the locking plate 61 via the mounting holes 68, eliminating the need for frequent modifications to the load-bearing structure during replacement. This significantly improves the device's flexibility in adapting to different scenarios and reduces maintenance costs.

[0052] III. Achieve realistic lane changing with precise trajectory simulation.

[0053] An innovative lateral lane-changing mechanism consisting of an electric cylinder 53 and a telescopic chain 54 is designed, with two independently controlled electric cylinders 53 and telescopic chains 54 installed in each telescopic slot 52. By controlling the difference in extension speed between the front and rear telescopic chains 54 (e.g., the front chain extends faster than the rear chain), the mechanism can simulate real lane-changing maneuvers such as "turning left" and "turning right," perfectly replicating the lane-changing trajectory of "longitudinal travel + lateral deviation," thus solving the problem of distorted lane-changing trajectories in existing technologies.

[0054] During lane changing, the magnetic locking and unlocking mechanism of the electromagnetic coil 67 and magnetic plate 56 enables the rapid docking and separation of the locking plate 61 between different tracks. The lane changing action is smooth and precise, and the lateral speed and acceleration can meet the requirements of 0-4.0m / s² and ≥3.0m / s², respectively. 2 It meets the requirements and has strong coordination with longitudinal motion, and the trajectory is not disordered after superposition.

[0055] IV. Modular structure, excellent scenario scalability

[0056] The scenario simulation device 1 adopts a modular structure with parallel left, center and right arrangements. The length of the middle device is greater than 240 meters, and the length of the left and right devices is greater than 150 meters. The track length can be flexibly combined or expanded according to actual testing needs, adapting to different scales of industrial automation, traffic simulation (such as autonomous driving testing), and logistics warehousing scenarios, with a wide range of applications.

[0057] Working principle:

[0058] The central scene simulation device 1 is longer than 240 meters, and the left and right scene simulation devices 1 are longer than 150 meters. Before operation, the locking mechanisms 6 on the left and right locking plates 61 can be removed. During operation, the shuttle 41 is first installed on the corresponding top rack 214 through the limiting slot plate 42, and then the required dummy target is installed on the locking plate 61 through the corresponding mounting hole 68. The motor 24 drives the turntable 26 to rotate, which drives the synchronous belt 213 to run in the track 21 through the rotation of the rack 212. The turntable 210 provides tension and auxiliary drive, and the support wheel 34 provides support and stability. When the dummy target needs to move from the middle scene simulation device 1 to the track 21 on another scene simulation device 1, the electric cylinder 53 drives the telescopic chain 54 to extend and laterally pull out the locking plate 61. Each telescopic groove 52 contains two electric cylinders 53 and two telescopic chains 54. During the pulling process, the two electric cylinders 53 can be controlled separately by an external controller to make their extension speeds different. For example, if the telescopic chain 54 in the front direction of travel extends faster than the telescopic chain 54 in the rear direction, it will present a dummy target like a car. The objective is to achieve a left turn onto the left track 21 until the two telescopic chains 54 extend to the same length. At this point, the locking plate 61 is inserted into the right-end locking groove 62 of the left locking plate 61. Then, the motor 66 inside the left locking plate 61 de-energizes the electromagnetic coil 67 on its right side, causing the right metal plate 65 to lose its magnetism and thus disengage. Simultaneously, the motor 66 energizes the electromagnetic coil 67 on its left side, giving the left metal plate 65 magnetism, which then aligns and secures the magnetic plate 56 of the connecting plate 55 on the left locking plate 61. After securing, the telescopic chain 54 of the middle locking plate 61 retracts, completing one lane change.

[0059] Technical effects of implementing this solution:

[0060] This solution addresses traction stability and accuracy issues through a sunken track constraint and tensioned power transmission; enhances multi-target adaptability through a modular locking mechanism; and achieves realistic longitudinal and lateral lane changing through dual electric cylinder differential telescopic and magnetic lane changing locking. Furthermore, its modular scenario design ensures scenario scalability. The overall solution effectively overcomes the shortcomings of existing technologies in traction accuracy, adaptability, and lane changing realism, demonstrating significant application value and competitive advantages in fields such as industrial automation, traffic simulation, and logistics warehousing.

[0061] The present invention comprises: 1-Scene simulation device; 2-Drive mechanism; 21-Rail; 22-Drive groove; 23-Rotation groove; 24-Motor; 25-Shaft 1; 26-Turntable 1; 27-Base; 28-Bearing 1; 29-Shaft 2; 210-Turntable 2; 211-Protruding shaft; 212-Rack 1; 213-Synchronous belt; 214-Rack 2; 3-Support mechanism; 31-Wheel groove; 32-Support rod; 33-Bearing 2; 34-Support wheel; 35-Rack and pinion three; 4-Drive mechanism; 41-Shuttle car; 42-Limiting groove plate; 43-Bearing three; 44-Fixing column; 5-Telescopic mechanism; 51-Telescopic box; 52-Telescopic groove; 53-Electric cylinder; 54-Telescopic chain; 55-Connecting plate; 56-Magnetic plate; 6-Locking mechanism; 61-Locking plate; 62-Locking groove; 63-Electrifying groove; 64-Partition plate; 65-Metal plate; 66-Electrifying motor; 67-Electromagnetic coil; 68-Mounting hole. All these components... For general standard parts or components known to those skilled in the art, the structure and principle of which can be learned by those skilled in the art through technical manuals or conventional experimental methods, the problem solved by this utility model is that existing towing and traction devices have some shortcomings: On the one hand, the basic traction structure lacks the constraint of a sunken track on the shuttle car, resulting in poor longitudinal traction stability and accuracy. At high speeds or high accelerations, the simulated object is prone to shaking and falling off, making it difficult to achieve a trajectory accuracy of ±0.3m and a speed accuracy of ±1.0km / h. Moreover, the load-bearing structure is fixed, resulting in poor adaptability to various types of false targets such as pedestrians and bicycles, requiring frequent modifications when replacing them. On the other hand, the lateral lane-changing device does not have the ability to change lanes in both longitudinal and lateral directions, and can only drag longitudinally. It cannot simulate the real lane change of "longitudinal travel + lateral offset". The lack of a turning point and swing angle adjustment point design leads to distortion of the lane-changing trajectory. At the same time, the lack of a dedicated telescopic mechanism makes it difficult to meet the requirements of 0-4.0m / s and ≥3.0m / s² for lateral speed and acceleration. 2 The requirements are not met, and there is no coordination with longitudinal movement, resulting in a disordered trajectory after superposition. This utility model makes up for the shortcomings of existing technologies by using a sunken track constraint, tensioned power transmission, modular locking mechanism, dual electric cylinder differential telescopic + magnetic lane change locking, and modular scenario design, and has significant application value and competitive advantages in multiple fields.

[0062] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0063] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A towing device, characterized in that: The device includes a scene simulation device (1), a drive mechanism (2), a support mechanism (3), a driving mechanism (4), a telescopic mechanism (5), and a locking mechanism (6). The scene simulation device (1) has a rectangular structure and is arranged in parallel with the middle structure. The length of the scene simulation devices (1) on the left and right sides is shorter than that of the middle scene simulation device (1). The drive mechanism (2) is located inside the scene simulation device (1). The support mechanism (3) is located inside the scene simulation device (1). The driving mechanism (4) is located on the drive mechanism (2). The telescopic mechanism (5) is located on the driving mechanism (4). The locking mechanism (6) is located on the telescopic mechanism (5). The drive mechanism (2) includes a track (21), a drive groove (22), a rotary groove (23), a motor (24), a first rotating shaft (25), a first turntable (26), a base (27), a first bearing (28), a second rotating shaft (29), a second turntable (210), a cam shaft (211), a first rack (212), a synchronous belt (213), and a second rack (214). The track (21) is recessed downwards in a waist-like structure and is located at the top of each scene simulation device (1). The drive groove (22) and the rotary groove (23) are recessed and opposite to each other at the bottom of the two ends of the track (21). The motor (24) is located at the bottom of the drive groove (22). The first rotating shaft (25) is located at the top of the motor (24). The first turntable (26) is located at the bottom of the drive groove (22). The first rotating shaft (25) is located at the top of the rotating shaft (25), the base (27) is located at the bottom of the rotating groove (23), the first bearing (28) is located at the top of the base (27), the second rotating shaft (29) is located in the inner ring of the first bearing (28) and extends upward, the second turntable (210) is located at the top of the second rotating shaft (29), the convex shaft (211) is located at the top of the first turntable (26) and the second turntable (210) respectively, the first rack (212) is evenly circumferentially arranged on the outer wall of each convex shaft (211), the synchronous belt (213) is arranged in a waist-like structure between the two convex shafts (211) and at the top, and the second rack (214) is evenly arranged at the top and bottom of the synchronous belt (213).

2. The towing device according to claim 1, characterized in that: The first rotating shaft (25) and the first turntable (26) are integrally formed, the second rotating shaft (29) and the second turntable (210) are integrally formed, the bottom of the second rotating shaft (29) is connected to the inner ring of the first bearing (28) by interference fit, the length of the second rack (214) is less than one-third of the first rack (212), the height of the second rack (214) is less than the height of the cam shaft (211), the height of the cam shaft (211) is equal to the sum of the height of the second rack (214) below and the thickness of the synchronous belt (213), the upper half of the cam shaft (211) can abut against the inner circumference of one end of the synchronous belt (213), the cam shaft (211) and the first rack (212) are integrally formed, and the synchronous belt (213) and the second rack (214) are integrally formed.

3. The towing device according to claim 2, characterized in that: The support mechanism (3) includes a wheel groove (31), a support rod (32), a second bearing (33), a support wheel (34), and a third rack (35). The wheel groove (31) is recessed laterally at equal intervals at the bottom of the track (21) and is located at the bottom of the lateral portion of the synchronous belt (213). The support rod (32) is located in the middle of the interior of each wheel groove (31). The second bearing (33) is wrapped around each support rod (32). The support wheel (34) is wrapped around each second bearing (33). The third rack (35) is evenly circumferentially arranged on the outer wall of each support wheel (34).

4. The towing device according to claim 3, characterized in that: The wheel groove (31) has a square structure, and the support wheel (34) and rack three (35) are integrally formed.

5. The towing device according to claim 4, characterized in that: The driving mechanism (4) includes a shuttle car (41), a limiting groove plate (42), a bearing three (43), and a fixing column (44). The shuttle car (41) is located at the top of each synchronous belt (213) and inside the track (21). The limiting groove plate (42) is located at the left and right ends of the bottom of the shuttle car (41). The bearing three (43) is located at the middle of the bottom of each limiting groove plate (42). The fixing column (44) is located inside each bearing three (43).

6. The towing device according to claim 5, characterized in that: The top of the shuttle (41) is higher than the top of the scene simulation device (1). The longitudinal section of the limiting groove plate (42) is U-shaped. The fixing column (44) and the shuttle (41) are integrally formed. The fixing column (44) is installed in the inner ring of the bearing three (43) by interference fit.

7. The towing device according to claim 6, characterized in that: The telescopic mechanism (5) includes a telescopic box (51), a telescopic groove (52), an electric cylinder (53), a telescopic chain (54), a connecting plate (55), and a magnetic plate (56). The telescopic box (51) is located on the top of each shuttle car (41). The telescopic groove (52) is located on the left and right halves of each telescopic box (51). The electric cylinder (53) is located at the inner end of each telescopic groove (52) and inside the telescopic box (51). The telescopic chain (54) is located at the output end of each electric cylinder (53). The connecting plate (55) is located at the output end of each telescopic chain (54). The magnetic plate (56) is located at the end of each connecting plate (55) away from the telescopic chain (54).

8. The towing device according to claim 7, characterized in that: The opening of the telescopic groove (52) in the left half faces the front end, and the opening of the telescopic groove (52) in the right half faces the rear end.

9. The towing device according to claim 8, characterized in that: The locking mechanism (6) includes a locking plate (61), a locking groove (62), an electrified groove (63), a partition (64), a metal plate (65), an electric motor (66), an electromagnetic coil (67), and a mounting hole (68). The locking plate (61) is disposed inside each of the telescopic grooves (52). The locking groove (62) is disposed in the front and rear halves of the interior of each locking plate (61). The electrified groove (63) is disposed between the front and rear locking grooves (62). The partition (64) is disposed between the electrified groove (63) and the two locking grooves (62). The metal plate (65) is disposed at one end of each partition (64) away from the other partition (64). The electric motor (66) is disposed inside the electrified groove (63). The electromagnetic coil (67) is disposed at both ends of the electric motor (66) and passes through the partition (64) and extends into the interior of each metal plate (65).

10. The towing device according to claim 9, characterized in that: The locking plate (61) has a cuboid structure, the locking groove (62) is located in the lower half of the locking plate (61), and the height of the power-conducting groove (63) is higher than the height of the locking groove (62).

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