Towing and steering automatic control vehicle

Abstract

The application discloses a kind of automatic control of traction steering carrying vehicle, it is related to carrying vehicle field, it is difficult to adjust the problem of oil cylinder steering mode when being hauled when using existing carrying vehicle, traction steering is not flexible and stable enough, including vehicle body, chassis, driving part, steering mechanism and traction mechanism, steering mechanism includes oil cylinder and piston rod, traction mechanism includes swing rod and traction rod, the application is controlled piston rod inside oil cylinder sliding by steering mechanism, to adjust driving part to change the driving direction of vehicle body, when the space of both ends of oil cylinder is connected by traction mechanism control automatically when the butt joint of traction rod and swing rod, and when the swing rod is swung by traction rod, the sliding state of piston rod is mechanically adjusted by swing rod, so that the driving direction of vehicle body can be automatically adjusted with the change of the orientation of traction rod, improve the flexibility and stability of vehicle body driving in the process of traction, the device is simple in structure, and stable and efficient in operation.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, specifically to a vehicle with automatic traction and steering control. Background Technology

[0002] In operational scenarios such as factory logistics, engineering transfer, and short-distance cargo traction, transport vehicles need to handle both autonomous driving and trailer traction operations. The flexibility of steering control, driving stability, and adaptability to different operating conditions directly impact the vehicle's operational efficiency and safety. Currently, most conventional transport vehicles on the market employ single hydraulic steering or passive traction steering structures, which struggle to simultaneously meet the dual requirements of autonomous driving and safe traction, and generally suffer from the following technical deficiencies: Some transport vehicles are equipped with only an active steering system driven by independent hydraulic cylinders, relying entirely on their own hydraulic pumps to drive the steering cylinders for front wheel steering. This type of structure can only meet the needs of autonomous vehicle operation and cannot be adapted to towing operations. When the trailer is towing, the hydraulic lock-up state of the steering cylinders restricts the front wheels from adaptively swinging with the drawbar, resulting in stiff steering control and high steering resistance during towing. It is prone to steering jamming and asynchronous steering between the trailer and the tractor, making it impossible to achieve convenient and smooth towing operations and severely restricting the vehicle's applicability to various working conditions. Most existing transport vehicles with both autonomous steering and towing functions adopt a structure design that manually switches the steering mode. After the drawbar is removed, it is necessary to manually operate valves, linkages, and other components to switch the steering mode in order to restore the autonomous hydraulic steering function. The operation process is cumbersome, has a low degree of automation, and is prone to problems such as incomplete switching and incorrect mode switching. At the same time, when the steering cylinder piston rod moves in towing mode, it directly squeezes the hydraulic oil back to the hydraulic pump. Long-term operation can easily cause impact and wear to the oil pump, significantly shortening the service life of hydraulic power components and increasing the risk of equipment failure and maintenance costs. Summary of the Invention

[0003] The purpose of this invention is to provide a vehicle with automatic traction and steering control that facilitates automatic adjustment of the hydraulic cylinder steering mode during traction, resulting in more flexible and stable traction and steering, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a vehicle with automatic traction and steering control, comprising a vehicle body, a steering mechanism, and a traction mechanism. The vehicle body has a chassis at its bottom, and the chassis has a drive component for assisting the vehicle body in driving and steering. The steering mechanism includes a hydraulic cylinder fixedly mounted on the chassis, with a piston rod inside the cylinder. The piston rod passes through both ends of the cylinder and is slidably connected to the inner walls of both ends of the cylinder. The steering mechanism can adjust the drive component to change the driving direction of the vehicle body by controlling the piston rod to slide inside the cylinder. The traction mechanism includes a swing rod and a traction rod mounted on the upper side of the chassis. The swing rod can mechanically control the sliding state of the piston rod. The traction mechanism can automatically connect the spaces at both ends of the hydraulic cylinder when the traction rod and the swing rod are engaged, and adjust the sliding state of the piston rod when the traction rod drives the swing rod to swing. This allows the vehicle body to automatically adjust its driving direction according to the orientation of the traction rod, facilitating automatic adjustment of the hydraulic cylinder steering mode during traction, resulting in more flexible and stable traction and steering.

[0005] Preferably, the drive unit includes two front wheels respectively mounted on both sides of the front end of the chassis, and rear wheels respectively provided on both sides of the rear end of the chassis. The axles of the front wheels and the rear wheels are rotatably connected to steering knuckles, and four sets of lower control arms are rotatably connected to the side of the chassis. The steering knuckles and the lower control arms are hinged by ball joints to facilitate the vehicle body to drive and steer.

[0006] Preferably, the traction mechanism further includes a device box fixedly mounted on the chassis. The side of the cylinder has a rotating cavity that communicates with the inner wall of the cylinder. A rotating shaft is rotatably connected inside the rotating cavity, and a sector gear is fixedly connected to the rotating shaft. The sector gear can swing within the rotating cavity. A gear post is fixedly connected to the middle of the piston rod. The outer wall of the gear post meshes with the sector gear. The outer wall of the gear post slides against the inner wall of the cylinder. The device box contains a control component for controlling the spatial communication state at both ends of the cylinder. This facilitates automatic connection of the spaces at both ends of the cylinder when the traction rod and the swing rod are connected, and adjusts the sliding state of the piston rod when the traction rod drives the swing rod to swing, so that the vehicle body can automatically adjust its driving direction as the orientation of the traction rod changes.

[0007] Preferably, the control component includes a rotating frame fixedly connected to the outer walls of the upper and lower ends of the rotating shaft, one end of the swing rod fixedly connected to the rotating frame, a first pipe and a second pipe respectively connected to both ends of the hydraulic cylinder, a communicating cavity opened inside the device box, the first pipe and the second pipe both communicating with the inner wall of the communicating cavity, a rotating column rotatably connected inside the communicating cavity, a communicating hole opened on the rotating column that can communicate with the first pipe and the second pipe, and a communicating component inside the device box for controlling the communicating state between the communicating hole and the first pipe, so as to facilitate the control of the spatial communication state between the two ends of the hydraulic cylinder.

[0008] Preferably, the connecting member includes a drive gear coaxially fixedly mounted on the upper side of the rotating column, a fixed cylinder is fixedly connected inside the device box, a rack is slidably connected inside the fixed cylinder, the rack meshes with the drive gear, and the traction rod is provided with an adjusting member that can control the sliding state of the rack during the connection with the swing rod, so as to facilitate the control of the connection state between the connecting hole and the first pipe.

[0009] Preferably, the adjusting component includes a rotating block rotatably connected to one end of the traction rod, a threaded rod coaxially fixedly connected to the side of the rotating block, a threaded groove that can be threadedly connected to the outer wall of the threaded rod on the side of the swing rod, a hydraulic cavity inside the swing rod, a guide groove communicating with the threaded groove on the side of the hydraulic cavity, a prism rod slidably connected in the guide groove, and a hydraulic component for controlling the hydraulic pressure in the fixed cylinder inside the hydraulic cavity, so as to control the sliding state of the rack during the connection with the swing rod.

[0010] Preferably, the hydraulic component includes a hydraulic plate fixedly installed at one end of the prism rod, an elastic element fixedly connected to the side of the hydraulic plate and fixedly connected to the hydraulic cavity, a first bent pipe communicating with the hydraulic cavity on the rotating frame, a second bent pipe communicating with one end of the first bent pipe on the rotating shaft, and a third bent pipe communicating with the fixed cylinder fixedly connected inside the device box, one end of the third bent pipe being coaxially rotatably connected to the bottom of the rotating shaft and communicating with the second bent pipe, which facilitates control of the hydraulic pressure in the fixed cylinder.

[0011] Preferably, the steering mechanism further includes universal joint couplings installed at both ends of the piston rod, the universal joint couplings being connected to the steering knuckle, a hydraulic oil pump being fixedly connected to the upper side of the chassis, and a third pipe and a fourth pipe being respectively connected to both ends of the oil cylinder, both of which are connected to the hydraulic oil pump, so as to adjust the driving component and change the driving direction of the vehicle body by controlling the piston rod to slide inside the oil cylinder.

[0012] Preferably, sealing slides are fixedly connected to both ends of the gear column. The sealing slides slide in contact with the inner wall of the cylinder, which facilitates the sealing of the hydraulic oil at both ends of the gear column and prevents communication between them inside the cylinder.

[0013] Preferably, the outer wall of the rotating block is provided with anti-slip texture to facilitate the rotation operation of the rotating block.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a traction and steering automatic control vehicle, which solves the problem that existing vehicles are difficult to automatically adjust the hydraulic cylinder steering mode during traction, resulting in insufficient traction and steering flexibility and stability. The invention controls the piston rod to slide inside the hydraulic cylinder through a steering mechanism, thereby adjusting the drive components to change the vehicle's driving direction. When the traction rod and swing rod are engaged, the space at both ends of the hydraulic cylinder is automatically connected through the traction mechanism. Furthermore, when the traction rod drives the swing rod to swing, the sliding state of the piston rod is mechanically adjusted by the swing rod, allowing the vehicle to automatically adjust its driving direction according to the orientation of the traction rod. This improves the flexibility and stability of the vehicle during traction. The device has a simple structure and is stable and efficient in operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the driving component of the present invention; Figure 3 This is a partial structural diagram of the steering mechanism of the present invention; Figure 4 for Figure 3 Enlarged view of region A in the middle; Figure 5 This is a partial structural cross-sectional view of the steering mechanism of the present invention; Figure 6 for Figure 5 Enlarged view of region B in the middle; Figure 7 This is a partial structural cross-sectional view of the traction mechanism of the present invention; Figure 8 for Figure 7 Enlarged view of region C; Figure 9 for Figure 7 Enlarged view of region D in the middle; Figure 10 This is a partial structural exploded view of the traction mechanism of the present invention; Figure 11 for Figure 10 Enlarged view of region E in the middle.

[0016] In the diagram: 1-Vehicle body; 2-Chassis; 3-Cylinder; 4-Piston rod; 5-Swing rod; 6-Traction rod; 7-Front wheel; 8-Rear wheel; 9-Steering knuckle; 10-Lower control arm; 11-Device box; 12-Rotating cavity; 13-Rotating shaft; 14-Sector gear; 15-Gear column; 16-Rotating frame; 17-First pipe; 18-Second pipe; 19-Connecting cavity; 20-Rotating column; 21-Connecting hole; 22-Drive gear; 23-Fixed cylinder; 24-Rack; 25-Rotating block; 26-Threaded rod; 27-Threaded groove; 28-Hydraulic cavity; 29-Guide groove; 30-Pyramidal rod; 31-Hydraulic plate; 32-Elastic element; 33-First bend; 34-Second bend; 35-Third bend; 36-Universal joint coupling; 37-Hydraulic oil pump; 38-Third pipe; 39-Fourth pipe; 40-Sealing slide plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-4 This invention provides a technical solution: a traction and steering automatic control vehicle, comprising a vehicle body 1, a steering mechanism, and a traction mechanism. A chassis 2 is located at the bottom of the vehicle body 1. The chassis 2 is equipped with a drive unit for assisting the vehicle body 1 in driving and steering. The drive unit includes two front wheels 7 respectively mounted on the front sides of the chassis 2, and rear wheels 8 respectively mounted on the rear sides of the chassis 2. Steering knuckles 9 are rotatably connected to the axles of the front wheels 7 and rear wheels 8. Four sets of lower control arms 10 are rotatably connected to the sides of the chassis 2. The steering knuckles 9 and the lower control arms 10 are hinged by ball joints. The steering mechanism includes a hydraulic cylinder 3 fixedly mounted on the chassis 2, and the hydraulic cylinder 3 contains... The piston rod 4 passes through both ends of the hydraulic cylinder 3 and is slidably connected to the inner walls of both ends of the hydraulic cylinder 3. The steering mechanism can adjust the driving component to change the driving direction of the vehicle body 1 by controlling the piston rod 4 to slide inside the hydraulic cylinder 3. The traction mechanism includes a swing rod 5 and a traction rod 6 installed on the upper side of the chassis 2. The swing rod 5 can mechanically control the sliding state of the piston rod 4. The traction mechanism can automatically connect the space at both ends of the hydraulic cylinder 3 when the traction rod 6 and the swing rod 5 are connected, and adjust the sliding state of the piston rod 4 when the traction rod 6 drives the swing rod 5 to swing, so that the vehicle body 1 can automatically adjust the driving direction as the orientation of the traction rod 6 changes.

[0019] Please see Figures 3-11The traction mechanism shown in the figure also includes a device box 11 fixedly mounted on the chassis 2. A rotating cavity 12 is provided on the side of the hydraulic cylinder 3, and the rotating cavity 12 is connected to the inner wall of the hydraulic cylinder 3. A rotating shaft 13 is rotatably connected inside the rotating cavity 12, and a sector gear 14 is fixedly connected to the rotating shaft 13. The sector gear 14 can swing within the rotating cavity 12. A gear column 15 is fixedly connected to the middle of the piston rod 4, and sealing slide plates 40 are fixedly connected to both ends of the gear column 15. The sealing slide plates 40 slide against the inner wall of the hydraulic cylinder 3. The outer wall of the gear column 15 meshes with the sector gear 14, and the outer wall of the gear column 15 slides against the inner wall of the hydraulic cylinder 3. The device box 11 contains a control... The control component for the spatial connection state of the two ends of the oil cylinder 3 includes a rotating frame 16 fixedly connected to the outer walls of the upper and lower ends of the rotating shaft 13, one end of the swing rod 5 fixedly connected to the rotating frame 16, and the two ends of the oil cylinder 3 respectively connected to a first pipe 17 and a second pipe 18. A connecting cavity 19 is provided in the device box 11, and the first pipe 17 and the second pipe 18 are both connected to the inner wall of the connecting cavity 19. A rotating column 20 is rotatably connected in the connecting cavity 19, and a connecting hole 21 is provided on the rotating column 20 that can connect to the first pipe 17 and the second pipe 18. A connecting component is provided in the device box 11 for controlling the connection state between the connecting hole 21 and the first pipe 17.

[0020] Please see Figures 7-11 The connecting components shown in the diagram include a drive gear 22 coaxially fixedly mounted on the upper side of the rotating column 20; a fixed cylinder 23 fixedly connected inside the device box 11; a rack 24 slidably connected inside the fixed cylinder 23; the rack 24 meshing with the drive gear 22; and an adjusting component on the traction rod 6 that controls the sliding state of the rack 24 during connection with the swing rod 5. The adjusting component includes a rotating block 25 rotatably connected to one end of the traction rod 6; the outer wall of the rotating block 25 has anti-slip texture; a threaded rod 26 coaxially fixedly connected to the side of the rotating block 25; a threaded groove 27 on the side of the swing rod 5 that can be threadedly connected to the outer wall of the threaded rod 26; a hydraulic cavity 28 inside the swing rod 5; and a guide groove 29 on the side of the hydraulic cavity 28 that communicates with the threaded groove 27. A prism rod 30 is slidably connected in the guide groove 29. A hydraulic component for controlling the hydraulic pressure in the fixed cylinder 23 is provided in the hydraulic cavity 28. The hydraulic component includes a hydraulic plate 31 fixedly installed at one end of the prism rod 30. An elastic component 32 fixedly connected to the side of the hydraulic plate 31 and fixedly connected to the hydraulic cavity 28 is provided. The elastic component 32 can be replaced by any existing elastic structure such as a spring. A first bent pipe 33 connected to the hydraulic cavity 28 is provided on the rotating frame 16. A second bent pipe 34 connected to one end of the first bent pipe 33 is provided on the rotating shaft 13. A third bent pipe 35 connected to the fixed cylinder 23 is fixedly connected in the device box 11. One end of the third bent pipe 35 is coaxially rotatably connected to the bottom of the rotating shaft 13 and connected to the second bent pipe 34.

[0021] Please see Figures 2-6 The steering mechanism shown in the figure also includes universal joint couplings 36 installed at both ends of the piston rod 4. The universal joint couplings 36 are connected to the steering knuckle 9. A hydraulic oil pump 37 is fixedly connected to the upper side of the chassis 2. The two ends of the cylinder 3 are respectively connected to a third pipe 38 and a fourth pipe 39. Both the third pipe 38 and the fourth pipe 39 are connected to the hydraulic oil pump 37.

[0022] Working principle: Under normal driving conditions, the threaded rod 26 on the traction rod 6 is not connected to the threaded groove 27 on the swing rod 5. At this time, under the push of the elastic element 32, the hydraulic plate 31 and the prism rod 30 slide towards the threaded groove 27 side in the hydraulic chamber 28, drawing the hydraulic oil inside the fixed cylinder 23 into the hydraulic chamber 28 through the third bend pipe 35, the second bend pipe 34 and the first bend pipe 33. This causes the rack 24 to slide into the fixed cylinder 23, and the rack 24 drives the drive gear 22 to rotate about 90°, causing the connecting hole 21 to rotate to a position where it is not connected to the first pipe 17 and the second pipe 18. The outer wall of the rotating column 20 and the inner wall of the connecting chamber 19 are sealed by a sealing gasket, preventing hydraulic oil from flowing into the second pipe 18 through the first pipe 17. At this time, the piston rod 4 inside the cylinder 3 can only be pumped by the hydraulic oil pump 37. When the hydraulic pump 37 draws oil from the third pipe 38 and fills the fourth pipe 39, the piston rod 4 slides towards the third pipe 38. The steering knuckle 9 can be controlled by the universal joint coupling 36 at both ends, causing the front wheel 7 to turn to one side. The vehicle body 1 can then turn diagonally towards the fourth pipe 39. Conversely, when the hydraulic pump 37 fills the third pipe 38 and draws oil from the fourth pipe 39, the vehicle body 1 turns towards the third pipe 38. At this time, the driving direction of the vehicle body 1 can be flexibly controlled by the hydraulic pump 37. The sliding of the piston rod 4 will drive the gear column 15 to swing the sector gear 14, thereby causing the swing rod 5 and the rotating frame 16 to swing together with the steering. However, since the swing rod 5 and the rotating frame 16 are relatively short and located at the bottom and inside of the vehicle body 1, they will not affect the driving of the vehicle body 1.

[0023] When traction is required, as shown in the attached document. Figure 7 - Appendix Figure 9As shown, the rotating block 25 at one end of the traction rod 6 is placed near one end of the swing rod 5. The threaded rod 26 is aligned with the threaded groove 27, and the rotating block 25 is rotated to screw the threaded rod 26 into the threaded groove 27. At this time, one end of the threaded rod 26 will continuously push the prism rod 30 to slide in the guide groove 29. The prism rod 30 pushes the hydraulic plate 31 to slide in the hydraulic chamber 28 and compress the elastic element 32, so that the hydraulic oil inside the hydraulic chamber 28 flows into the fixed cylinder 23 through the first bend pipe 33, the second bend pipe 34 and the third bend pipe 35, pushing the rack. After sliding out of the fixed cylinder 23 and driving the drive gear 22 to rotate 90°, the cylinder is stopped and cannot slide out further. At this time, the connecting hole 21 on the rotating column 20 rotates to a state where it is connected to the first pipe 17 and the second pipe 18. This allows the hydraulic oil at both ends of the cylinder 3 to be connected through the first pipe 17, the second pipe 18, and the connecting hole 21. At this time, the end of the towing rod 6 away from the swing rod 5 is connected to the trailer in front, and towing can be performed. During the towing process, as the front vehicle turns, the direction of the towing rod 6 will change, thus... The swing arm 5 swings along with the traction rod 6. The swing arm 5 drives the rotating frame 16, which in turn drives the rotating shaft 13 to rotate the sector gear 14. The sector gear 14 drives the gear column 15 to slide horizontally inside the cylinder 3, which in turn drives the piston rod 4 to slide. This, in turn, drives the front wheel 7 to deflect through the universal joint coupling 36 and the steering knuckle 9 at both ends. At this time, the deflection direction of the front wheel 7 is the same as the deflection direction of the swing arm 5, making the turning smoother and preventing the traction rod 6 from being subjected to excessive force, thus preventing the vehicle body 1 from fishtailing and veering. After traction is completed, the threaded rod 26 is unscrewed, and the elasticity is released. When component 32 rebounds, the hydraulic plate 31 resets, and the rack 24 slides in the opposite direction, causing the connecting hole 21 to disconnect from the first pipe 17 and the second pipe 18. This allows the hydraulic pump 37 to be restarted to drive the steering mode. In traction mode, the first pipe 17 and the second pipe 18 connect the two ends of the cylinder 3, so that the piston rod 4 will not over-pressurize the hydraulic oil into the hydraulic pump 37 during the sliding process. Therefore, mechanical steering can be performed without starting the hydraulic pump 37, and the hydraulic pump 37 will not be damaged by excessive reverse pressure.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transport vehicle with automatic traction and steering control, characterized in that, include: The vehicle body (1) has a chassis (2) at its bottom, and the chassis (2) has a drive component for assisting the vehicle body (1) in driving and steering. Also includes: Steering mechanism, the steering mechanism includes a hydraulic cylinder (3) fixedly installed on the chassis (2), the hydraulic cylinder (3) is provided with a piston rod (4) inside, the piston rod (4) passes through both ends of the hydraulic cylinder (3) and is slidably connected to the inner walls of both ends of the hydraulic cylinder (3); The traction mechanism includes a swing rod (5) and a traction rod (6) mounted on the upper side of the chassis (2).

2. A traction and steering automatic control vehicle according to claim 1, characterized in that: The drive unit includes two front wheels (7) respectively installed on both sides of the front end of the chassis (2), and rear wheels (8) respectively provided on both sides of the rear end of the chassis (2). The axles of the front wheels (7) and the rear wheels (8) are rotatably connected to steering knuckles (9). Four sets of lower control arms (10) are rotatably connected to the side of the chassis (2). The steering knuckles (9) and the lower control arms (10) are hinged by ball joints.

3. A traction and steering automatic control vehicle according to claim 2, characterized in that: The traction mechanism also includes a device box (11) fixedly installed on the chassis (2). The side of the cylinder (3) is provided with a rotating cavity (12). The rotating cavity (12) is connected to the inner wall of the cylinder (3). A rotating shaft (13) is rotatably connected in the rotating cavity (12). A sector gear (14) is fixedly connected on the rotating shaft (13). The sector gear (14) can swing in the rotating cavity (12). A gear column (15) is fixedly connected to the middle of the piston rod (4). The outer wall of the gear column (15) meshes with the sector gear (14). The outer wall of the gear column (15) slides against the inner wall of the cylinder (3). The device box (11) is provided with a control component for controlling the spatial communication state of the two ends of the cylinder (3).

4. A traction and steering automatic control vehicle according to claim 3, characterized in that: The control component includes a rotating frame (16) fixedly connected to the outer walls of the upper and lower ends of the rotating shaft (13), one end of the swing rod (5) fixedly connected to the rotating frame (16), the two ends of the oil cylinder (3) are respectively connected to a first pipe (17) and a second pipe (18), a connecting cavity (19) is provided in the device box (11), the first pipe (17) and the second pipe (18) are both connected to the inner wall of the connecting cavity (19), a rotating column (20) is rotatably connected in the connecting cavity (19), a connecting hole (21) is provided on the rotating column (20) that can connect to the first pipe (17) and the second pipe (18), and a connecting component is provided in the device box (11) for controlling the connection state between the connecting hole (21) and the first pipe (17).

5. A transport vehicle with automatic traction and steering control according to claim 4, characterized in that: The connecting member includes a drive gear (22) coaxially fixedly installed on the upper side of the rotating column (20), a fixed cylinder (23) is fixedly connected inside the device box (11), a rack (24) is slidably connected inside the fixed cylinder (23), the rack (24) meshes with the drive gear (22), and the traction rod (6) is provided with an adjusting member that can control the sliding state of the rack (24) during the process of connecting with the swing rod (5).

6. A transport vehicle with automatic traction and steering control according to claim 5, characterized in that: The adjusting component includes a rotating block (25) rotatably connected to one end of the traction rod (6). A threaded rod (26) is coaxially fixedly connected to the side of the rotating block (25). A threaded groove (27) is provided on the side of the swing rod (5) so as to be threadedly connected to the outer wall of the threaded rod (26). A hydraulic cavity (28) is provided inside the swing rod (5). A guide groove (29) communicating with the threaded groove (27) is provided on the side of the hydraulic cavity (28). A prism rod (30) is slidably connected inside the guide groove (29). A hydraulic component for controlling the hydraulic pressure inside the fixed cylinder (23) is provided inside the hydraulic cavity (28).

7. A transport vehicle with automatic traction and steering control according to claim 6, characterized in that: The hydraulic components include a hydraulic plate (31) fixedly installed at one end of the prism rod (30), an elastic element (32) fixedly connected to the side of the hydraulic plate (31) and fixedly connected to the hydraulic cavity (28), a first bent pipe (33) connected to the hydraulic cavity (28) is provided on the rotating frame (16), a second bent pipe (34) connected to one end of the first bent pipe (33) is provided on the rotating shaft (13), a third bent pipe (35) connected to the fixed cylinder (23) is fixedly connected inside the device box (11), and one end of the third bent pipe (35) is coaxially rotatably connected to the bottom of the rotating shaft (13) and connected to the second bent pipe (34).

8. A transport vehicle with automatic traction and steering control according to claim 2, characterized in that: The steering mechanism also includes universal joint couplings (36) installed at both ends of the piston rod (4). The universal joint couplings (36) are connected to the steering knuckle (9). A hydraulic oil pump (37) is fixedly connected to the upper side of the chassis (2). The two ends of the cylinder (3) are respectively connected to a third pipe (38) and a fourth pipe (39). The third pipe (38) and the fourth pipe (39) are both connected to the hydraulic oil pump (37).

9. A traction and steering automatic control vehicle according to claim 3, characterized in that: Both ends of the gear column (15) are fixedly connected to sealing slides (40), and the sealing slides (40) slide in contact with the inner wall of the oil cylinder (3).

10. A transport vehicle with automatic traction and steering control according to claim 6, characterized in that: The outer wall of the rotating block (25) is provided with anti-slip texture.

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