Multifunctional transportation multi-hanging train

Abstract

The invention relates to the technical field of multi-trailer trains, and discloses a multifunctional transportation multi-trailer train which comprises a main trailer plate and an auxiliary trailer plate, a multi-trailer connecting mechanism is assembled between the connecting end of the main trailer plate and the connecting end of the auxiliary trailer plate, and the multi-trailer connecting mechanism is used for connecting the auxiliary trailer plate to the main trailer plate in a hanging mode; the multi-hanging connecting mechanism comprises fixed seats and an adjusting seat slidably mounted between the fixed seats, a plurality of groups of telescopic holes are formed in the lower surface of the adjusting seat, each group of telescopic holes is of a triangular structure, and a position adjusting mechanism coupled with a hydraulic machine integrated with the trailer is mounted on the fixed seat; the position adjusting mechanism is driven by a hydraulic machine, the first pushing column and the second pushing column can be accurately controlled to sequentially and alternately stretch out and draw back, so that the adjusting base and the auxiliary trailer plate are pushed to slide on the main trailer plate, and a driver can flexibly adjust the relative position between the main trailer plate and the auxiliary trailer plate according to the actual transportation requirement; further, the weight distribution proportion of axle bearing is optimized, and driving safety and stability are ensured.

Description

Technical Field

[0001] The invention relates to the field of multi-trailer trains, and more particularly to a multifunctional transport multi-trailer train. Background Art

[0002] In the field of logistics and transportation, with the diversification and complexity of cargo transportation needs, the traditional single trailer transportation method can no longer meet the needs of efficiency, flexibility and safety. Multi-functional transportation multi-trailer trains usually consist of a tractor and multiple trailers, which are connected to the tractor through a specific connection mechanism. This type of train is designed to improve transportation efficiency and increase transportation capacity by increasing the number of trailers while maintaining transportation stability and safety.

[0003] According to the transportation needs, choose the appropriate tractor and trailer. This connection method is more secure, and the semi-trailer has better flexibility and stability, which is suitable for long-distance cargo transportation. For the trailer, insert the traction belt pin into the traction belt seat of the tractor and ensure that the connection is firm. After the connection is completed, the multi-trailer train needs to be debugged and inspected;

[0004] However, the traditional trailer connection mechanism usually cannot be adjusted after installation. Since the loading weight is different each time, the axle load weight distribution is often uneven, which affects the transportation efficiency and safety. For this reason, we propose a multi-functional transport multi-trailer train. Summary of the invention

[0005] The present invention provides a multifunctional transport multi-trailer train, which solves the technical problem in the related art that the loading weight is different each time, the axle load weight distribution is often uneven, and the transport efficiency and safety are affected.

[0006] The present invention provides a multifunctional transport multi-trailer train, comprising a main trailer plate and an auxiliary trailer plate, wherein a multi-trailer connection mechanism is arranged between the connecting ends of the main trailer plate and the auxiliary trailer plate, and the multi-trailer connection mechanism is used to connect the auxiliary trailer plate to the main trailer plate;

[0007] The multi-hook connection mechanism includes a fixed seat and an adjustment seat slidably mounted between the fixed seats, a plurality of telescopic holes are arranged on the lower surface of the adjustment seat, and each telescopic hole is a triangular structure, and a positioning mechanism coupled with a hydraulic press integrated with the trailer is installed on the fixed seat;

[0008] The positioning mechanism includes a positioning column and multiple groups of pushing columns arranged in pairs, each group of pushing columns includes pushing column one and pushing column two, and the oil supply of the positioning column is driven by a hydraulic press to control pushing column one and pushing column two to perform sequential alternating extension and retraction. Pushing column one first presses against the side wall of the limiting hole to push the adjustment seat toward the auxiliary trailer plate, and then pushing column two presses against the side wall of the next limiting hole to continue to push the adjustment seat to move. Each extension and retraction cycle causes the adjustment seat to drive the auxiliary trailer plate to slide, thereby adjusting the weight distribution ratio of the load on the main trailer plate axle.

[0009] Furthermore, two liquid storage tanks are arranged on the main trailer plate and the auxiliary trailer plate, a loading platform is arranged in the space between the two liquid storage tanks, two cargo baffles are arranged on the loading platform, the liquid storage tanks are used to transport liquid goods, and the loading platform is used to transport bulk solid goods.

[0010] Furthermore, hydraulic support feet are installed under the front ends of the main trailer plate and the auxiliary trailer plate. The hydraulic support feet are also connected to the hydraulic press of the trailer, and the oil supply direction of the hydraulic press is controlled by the cab control system to provide the required hydraulic oil to the positioning mechanism when needed.

[0011] Furthermore, a saddle is fixedly installed on the adjusting seat, and pressure rails are fixedly connected to the two edges below the adjusting seat. A number of semi-cylindrical slide rails are arranged in the space between the two pressure rails, and the several slide rails are fixedly connected to the adjusting seat, and the upper surface of the adjusting seat protrudes from the upper wall of the fixed seat.

[0012] Furthermore, a plurality of sliding grooves are provided between the two adjusting columns on the upper wall of the fixed seat, and the plurality of sliding grooves correspond one-to-one to the plurality of sliding rails, and a pressure-bearing groove is provided on the inner wall of the fixed seat outside the two adjusting columns, the diameter of the pressure-bearing groove is the same as the diameter of the pressure-bearing rail, and the pressure-bearing rail is slidably connected to the pressure-bearing groove, and the adjusting seat is slidably connected to the fixed seat through the pressure-bearing rail and the pressure-bearing groove.

[0013] Furthermore, a side wall of the adjustment seat is fixedly inlaid with a magnetic sheet, and a plurality of electromagnetic switches are fixedly provided on the side of the upper wall of the fixed seat close to the magnetic sheet. The electromagnetic switches are connected to the system in the trailer cab through connecting wires. A protective tube is fixedly connected to one side of the fixed seat, and the connecting wires of the plurality of electromagnetic switches are routed along the protective tube to protect the connecting wires.

[0014] Furthermore, a filling chamber is provided inside the positioning column, the oil inlet end of the filling chamber is connected to a hydraulic connecting pipe, the end of the hydraulic connecting pipe away from the positioning column is interconnected with a hydraulic press integrated with the trailer, and a hydraulic piston is slidably arranged inside the filling chamber.

[0015] Furthermore, a follower slide column is fixedly arranged on the side of the hydraulic piston away from the hydraulic connecting pipe, a guide path is opened at the end of the follower slide column away from the hydraulic piston, the follower slide column is slidably connected with the positioning column, a return spring is arranged above the end of the follower slide column close to the hydraulic piston, and a closing groove is opened on the upper wall of the follower slide column.

[0016] Furthermore, each group of telescopic holes includes telescopic hole 1 and telescopic hole 2, side pressure groove 1 is opened on both sides of telescopic hole 1, pushing column 1 is slidably connected with telescopic hole 1, and pushing column 1 is rotatably provided at the bottom end of pushing column 1, and one end of pushing column 1 away from pushing column 1 is rotatably connected with the folding groove, and the thickness dimension of side pressure groove 1 is the same as the thickness dimension of pushing column 1.

[0017] Furthermore, the telescopic hole 2 is slidably connected to the pushing column 2, and side pressure grooves 2 are opened on both sides of the telescopic hole 2. The bottom end of the pushing column 2 is fixedly and rotatably provided with a pushing column 2, and one end of the pushing column 2 away from the pushing column 2 is rotatably connected to the folding groove, and the thickness dimension of the side pressure groove 2 is the same as the thickness dimension of the pushing column 2.

[0018] The beneficial effects of the present invention are:

[0019] The multi-hook connection mechanism of the present invention realizes the flexible hooking and adjustment of the auxiliary trailer plate on the main trailer plate. The adjustment seat in the multi-hook connection mechanism can be slidably installed between the fixed seats, and a plurality of groups of telescopic holes of triangular structure are arranged on its lower surface. This design not only enhances the stability of the structure, but also provides accurate guidance for the telescopic extension of the push column. The adjustment mechanism is driven by a hydraulic press and can accurately control the sequential alternating telescopic extension of the push column 1 and the push column 2, thereby pushing the adjustment seat and the auxiliary trailer plate to slide on the main trailer plate. This mechanism enables the driver to flexibly adjust the relative position between the main trailer plate and the auxiliary trailer plate according to actual transportation needs, thereby optimizing the weight distribution ratio of the axle load, and ensuring driving safety and stability.

[0020] The design of the adjustment mechanism is not only flexible, but also efficient and convenient. Through the adjustment column driven by the hydraulic press, the driver can easily control it in the cab to realize the automatic extension and retraction of the push column and the sliding of the adjustment seat. This automated process greatly reduces the driver's operating burden and improves the efficiency of transportation operations. At the same time, due to the sequential alternating extension and retraction of the push column 1 and the push column 2, the movement of the adjustment seat is more stable and continuous, avoiding vehicle bumps or damage caused by sudden force. In addition, the design also enables the vehicle to flexibly adjust the trailer combination according to the weight and volume of different goods, realizing a one-stop solution for multiple transportation needs. This not only improves the utilization rate of the vehicle, but also reduces transportation costs, bringing higher economic benefits to the logistics industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the main trailer plate structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the fixing seat of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the adjustment seat of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the adjustment column of the present invention;

[0026] Figure 6 It is a schematic diagram of the internal structure of the adjustment seat of the present invention;

[0027] Figure 7 It is a structural schematic diagram of a push column of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the push column 2 of the present invention.

[0029] In the figure: 11, main trailer plate; 12, hydraulic support foot; 13, liquid storage tank; 14, loading platform; 15, cargo baffle; 2, multi-hanging connection mechanism; 21, fixed seat; 22, adjustment seat; 23, slide; 24, pressure rail; 25, slide; 26, pressure groove; 27, magnet; 28, electromagnetic switch; 29, protective tube; 201, limit hole; 3, adjustment mechanism; 31, adjustment column; 32, hydraulic connection pipe ; 33. Telescopic hole; 331. Telescopic hole one; 332. Telescopic hole two; 34. Pushing column; 341. Pushing column one; 342. Pushing column two; 35. Liquid filling chamber; 36. Guide way; 38. Side pressure groove one; 39. Return spring; 301. Hydraulic piston; 302. Pushing column one; 303. Closing groove; 304. Following slide column; 306. Side pressure groove two; 307. Pushing column two; 4. Saddle; 5. Auxiliary trailer plate. DETAILED DESCRIPTION

[0030] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0031] like Figure 1 and Figure 2As shown, a multifunctional transport multi-trailer train includes a main trailer plate 11 and an auxiliary trailer plate 5, and a multi-trailer connecting mechanism 2 is installed between the connecting ends of the main trailer plate 11 and the auxiliary trailer plate 5, and the multi-trailer connecting mechanism 2 is used to connect the auxiliary trailer plate 5 to the main trailer plate 11;

[0032] The multi-hook connection mechanism 2 includes a fixed seat 21 and an adjustment seat 22 slidably mounted between the fixed seats 21. The lower surface of the adjustment seat 22 is provided with a plurality of telescopic holes 33, and each telescopic hole 33 is a triangular structure. The fixed seat 21 is provided with a positioning mechanism 3 coupled with a hydraulic press integrated with the trailer;

[0033] like Figure 3 , Figure 4 and Figure 5 As shown, the positioning mechanism 3 includes a positioning column 31 and a plurality of groups of pushing columns 34 arranged in pairs, each group of pushing columns 34 includes a pushing column 1 341 and a pushing column 2 342. The oil supply of the positioning column 31 is driven by a hydraulic press to control the pushing column 1 341 and the pushing column 2 342 to perform sequential alternating extension and retraction. The pushing column 1 341 first presses against the side wall of the limiting hole 201 to push the adjustment seat 22 toward the auxiliary trailer plate 5, and then the pushing column 2 342 presses against the side wall of the next limiting hole 201 to continue to push the adjustment seat 22 to move. Each extension and retraction cycle causes the adjustment seat 22 to drive the auxiliary trailer plate 5 to slide, thereby adjusting the weight distribution ratio of the axle load of the main trailer plate 11.

[0034] Through the design of the multi-hook connection mechanism 2 and the adjustment mechanism 3, the weight distribution ratio between the main trailer plate 11 and the auxiliary trailer plate 5 can be automatically adjusted to ensure driving safety;

[0035] The adjustment mechanism 3 driven by the hydraulic press realizes automatic adjustment, which reduces the operating burden of the driver.

[0036] Two liquid storage tanks 13 are arranged on the main trailer plate 11 and the auxiliary trailer plate 5, a loading platform 14 is arranged in the space between the two liquid storage tanks 13, two cargo baffles 15 are arranged on the loading platform 14, the liquid storage tanks 13 are used to transport liquid goods, and the loading platform 14 is used to transport bulk solid goods.

[0037] When transporting liquid goods, the front and rear liquid storage tanks 13 on the main trailer plate 11 and the auxiliary trailer plate 5 of the vehicle will be filled with liquid, while the middle loading platform 14 remains empty. This design not only meets the total weight requirement of vehicle transportation, but also ensures the safe transportation of liquid goods. When the liquid goods arrive at the destination, the liquid storage tanks 13 will be emptied to prepare for the return transportation.

[0038] In the return transport, the vehicle can make full use of the loading platform 14 to transport bulk cargo or solid cargo such as pallet cargo. This design enables the vehicle to meet the transportation needs of both liquid and bulk solid cargo in one round trip, thereby greatly improving the transportation efficiency and vehicle utilization. The vehicle design realizes the two-way transportation of liquid and bulk solid cargo, greatly improving the flexibility and utilization of the vehicle. Whether it is the outbound or return trip, the vehicle can load cargo, thereby reducing the empty driving rate and saving operating costs.

[0039] like Figure 3 and Figure 4 As shown, hydraulic support legs 12 are installed under the front ends of the main trailer plate 11 and the auxiliary trailer plate 5. The hydraulic support legs 12 are also connected to the hydraulic press of the trailer, and the oil supply direction of the hydraulic press is controlled by the cab control system to provide the required hydraulic oil to the positioning mechanism 3 when needed.

[0040] A saddle 4 is fixedly mounted on the adjusting seat 22, and pressure rails 24 are fixedly connected to the two edges below the adjusting seat 22. A plurality of semi-cylindrical slide rails 25 are arranged in the space between the two pressure rails 24, and the plurality of slide rails 25 are fixedly connected to the adjusting seat 22, and the upper surface of the adjusting seat 22 protrudes from the upper wall of the fixed seat 21.

[0041] A plurality of slide grooves 23 are provided between the two adjusting columns 31 on the upper wall of the fixed seat 21, and the plurality of slide grooves 23 correspond one-to-one to the plurality of slide rails 25. A pressure-bearing groove 26 is provided on the inner wall of the fixed seat 21 outside the two adjusting columns 31. The diameter of the pressure-bearing groove 26 is the same as the diameter of the pressure-bearing rail 24, and the pressure-bearing rail 24 is slidably connected to the pressure-bearing groove 26. The adjusting seat 22 is slidably connected to the fixed seat 21 through the pressure-bearing rail 24 and the pressure-bearing groove 26.

[0042] A magnet sheet 27 is fixedly embedded on the side wall of the adjustment seat 22, and a plurality of electromagnetic switches 28 are fixedly provided on the upper wall of the fixing seat 21 close to the magnet sheet 27. The electromagnetic switches 28 are connected to the system in the trailer cab through connecting wires. A protective tube 29 is fixedly connected to one side of the fixing seat 21, and the connecting wires of the plurality of electromagnetic switches 28 are routed along the protective tube 29 to protect the connecting wires.

[0043] When the total weight of the cargo on the auxiliary trailer plate 5 is greater than the preset weight of the axle load of the main trailer plate 11, the driver controls the system in the cab and supplies oil to the adjustment column 31 through the hydraulic press, so that the control push column 1 341 and the push column 2 342 are sequentially and alternately extended and retracted. Each extension cycle causes the adjustment seat 22 to drive the auxiliary trailer plate 5 to slide, thereby adjusting the weight distribution ratio of the axle load of the main trailer plate 11.

[0044] The adjusting seat 22 is subjected to thrust, and the adjusting seat 22 slides with the thrust, and is stuck in the pressure groove 26 through the pressure rail 24, thereby ensuring the stability between the adjusting seat 22 and the fixed seat 21. Even when the auxiliary trailer plate 5 is driving, the huge force transmitted is within the bearing range of the two, so as to ensure the safety of driving;

[0045] When the auxiliary trailer plate 5 and the main trailer plate 11 are connected, the main trailer plate 11 needs to be connected to the trailer first, and then the trailer is driven backward with the main trailer plate 11, so that the traction pin of the auxiliary trailer plate 5 is stuck in the saddle 4, and at this time, the push column 1 341 and the push column 2 342 controlled by the hydraulic press are all retracted, so that when the trailer is moving backward with the main trailer plate 11, the adjusting seat 22 can slide to the initial position under the thrust of the reverse vehicle;

[0046] When the adjustment seat 22 slides, the magnet piece 27 approaches the electromagnetic switches 28 at different positions. The electromagnetic switch 28 at which position it approaches sends a signal to the system in the cab through the connecting wire to indicate the real-time situation of the position adjustment of the driver's saddle 4.

[0047] like Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, a filling chamber 35 is provided inside the positioning column 31, and the oil inlet end of the filling chamber 35 is connected to a hydraulic connecting pipe 32. The end of the hydraulic connecting pipe 32 away from the positioning column 31 is interconnected with a hydraulic press integrated with the trailer, and a hydraulic piston 301 is slidably arranged inside the filling chamber 35.

[0048] A follower column 304 is fixedly arranged on the side of the hydraulic piston 301 away from the hydraulic connecting pipe 32, a guide path 36 is provided at the end of the follower column 304 away from the hydraulic piston 301, the follower column 304 is slidably connected to the positioning column 31, a return spring 39 is provided above the end of the follower column 304 close to the hydraulic piston 301, and a closing groove 303 is provided on the upper wall of the follower column 304.

[0049] Each group of telescopic holes 33 includes a telescopic hole 1 331 and a telescopic hole 2 332. Side pressure grooves 38 are provided on both sides of the telescopic hole 1 331. A pushing column 341 is slidably connected to the telescopic hole 1 331. A pushing column 302 is rotatably provided at the bottom end of the pushing column 341. One end of the pushing column 302 away from the pushing column 341 is rotatably connected to the folding groove 303. The thickness of the side pressure groove 38 is the same as the thickness of the pushing column 302.

[0050] The second telescopic hole 332 is slidably connected to the second pushing column 342. Side pressure grooves 306 are provided on both sides of the second telescopic hole 332. A second pushing column 307 is fixedly and rotatably provided at the bottom end of the second pushing column 342. One end of the second pushing column 307 away from the second pushing column 342 is rotatably connected to the folding groove 303. The thickness dimension of the second side pressure groove 306 is the same as the thickness dimension of the second pushing column 307.

[0051] When the driver controls the hydraulic press to supply oil to the adjustment column 31 through the system, the hydraulic oil flows into the filling chamber 35 through the hydraulic connecting pipe 32. As the hydraulic oil in the filling chamber 35 increases, the hydraulic piston 301 is gradually pushed to slide, and the hydraulic piston 301 pushes the sliding column 304 to slide. The sliding of the sliding column 304 is divided into two sections. The sliding of the sliding column 304 is the first section when the sliding column 304 starts to slide. The sliding column 304 pushes the push column 1 302 to gradually turn out from the side of the side pressure groove 1 38, and pushes the push column 1 341 until the push column 1 341 and the sliding column 304 reach 90 degrees. When the push column 1 341 is extended, it is close to the side wall of the first limiting hole 201 and pushes the adjustment seat 22 to move toward the auxiliary trailer plate 5.

[0052] After the push post 1 341 and the follower slide post 304 reach 90 degrees, as the push post 1 341 gradually rotates, the push post 1 341 is pulled back, and the height dimension of the push post 1 341 is greater than the height dimension of the push post 2 342. When the push post 1 341 is retracted, the push post 2 342 is gradually pushed out by the push post 2 307. The length of the push post 2 307 is greater than the length of the push post 1 302. The push post 2 342 clings to the side wall of the next limiting hole 201 and continues to push the adjustment seat 22 to move. In this way, the position of the adjustment seat 22 and the saddle 4 can be automatically adjusted to adjust the weight distribution ratio of the axle load of the main trailer plate 11.

[0053] Finally, the adjusted position is fixed by extending the push pin 341.

[0054] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A multifunctional transport multi-trailer train, comprising a main trailer plate (11) and an auxiliary trailer plate (5), characterized in that: A multi-hook connection mechanism (2) is installed between the connection ends of the main trailer plate (11) and the auxiliary trailer plate (5), and the multi-hook connection mechanism (2) is used to hang the auxiliary trailer plate (5) on the main trailer plate (11); The multi-hook connection mechanism (2) comprises a fixed seat (21) and an adjustment seat (22) slidably mounted between the fixed seats (21); a plurality of groups of limiting holes (201) are arranged on the lower surface of the adjustment seat (22); and each group of limiting holes (201) is a triangular structure; and a positioning mechanism (3) connected to a hydraulic press integrated with the trailer is mounted on the fixed seat (21); The positioning mechanism (3) comprises a positioning column (31) and a plurality of groups of pushing columns (34) arranged in pairs, each group of pushing columns (34) comprising a first pushing column (341) and a second pushing column (342). The hydraulic press drives the oil supply of the positioning column (31) to control the first pushing column (341) and the second pushing column (342) to perform sequential alternating extension and retraction. The first pushing column (341) first closely contacts the side wall of the limiting hole (201) to push the adjustment seat (22) to move toward the auxiliary trailer plate (5), and then the second pushing column (342) closely contacts the side wall of the next limiting hole (201) to continue to push the adjustment seat (22) to move. Each extension and retraction cycle causes the adjustment seat (22) to drive the auxiliary trailer plate (5) to slide, thereby adjusting the weight distribution ratio of the axle load of the main trailer plate (11).

2. A multifunctional transport multi-trailer train according to claim 1, characterized in that: Two liquid storage tanks (13) are arranged on the main trailer plate (11) and the auxiliary trailer plate (5); a loading platform (14) is arranged in the space between the two liquid storage tanks (13); two cargo baffles (15) are arranged on the loading platform (14); the liquid storage tanks (13) are used to transport liquid goods, and the loading platform (14) is used to transport bulk solid goods.

3. The multifunctional transport multi-trailer train according to claim 1, characterized in that: Hydraulic legs (12) are installed below the front ends of the main trailer plate (11) and the auxiliary trailer plate (5). The hydraulic legs (12) are also connected to the hydraulic press of the trailer, and the oil supply direction of the hydraulic press is controlled by the cab control system so as to provide the required hydraulic oil to the positioning mechanism (3) when needed.

4. The multifunctional transport multi-trailer train according to claim 1, characterized in that: A saddle (4) is fixedly mounted on the adjustment seat (22); two ribs below the adjustment seat (22) are fixedly connected to pressure rails (24); a plurality of semi-cylindrical slide rails (25) are arranged in the space between the two pressure rails (24); and the plurality of slide rails (25) are fixedly connected to the adjustment seat (22); and the upper surface of the adjustment seat (22) protrudes from the upper wall of the fixed seat (21).

5. The multifunctional transport multi-trailer train according to claim 4, characterized in that: A plurality of slide grooves (23) are provided between the two adjusting columns (31) on the upper wall of the fixed seat (21), and the plurality of slide grooves (23) correspond to the plurality of slide rails (25) one by one. A pressure-bearing groove (26) is provided on the inner wall of the fixed seat (21) outside the two adjusting columns (31). The diameter of the pressure-bearing groove (26) is the same as the diameter of the pressure-bearing rail (24), and the pressure-bearing rail (24) is slidably connected to the pressure-bearing groove (26). The adjusting seat (22) is slidably connected to the fixed seat (21) via the pressure-bearing rail (24) and the pressure-bearing groove (26).

6. The multifunctional transport multi-trailer train according to claim 1, characterized in that: A magnet sheet (27) is fixedly inlaid on the side wall of the adjustment seat (22); a plurality of electromagnetic switches (28) are fixedly arranged on a side of the upper wall of the fixing seat (21) close to the magnet sheet (27); the electromagnetic switches (28) are connected to a system in the trailer cab via connecting wires; a protective tube (29) is fixedly connected to one side of the fixing seat (21); and the connecting wires of the plurality of electromagnetic switches (28) are routed along the protective tube (29) to protect the connecting wires.

7. The multifunctional transport multi-trailer train according to claim 1, characterized in that: A liquid filling chamber (35) is provided inside the positioning column (31), an oil inlet end of the liquid filling chamber (35) is connected to a hydraulic connecting pipe (32), an end of the hydraulic connecting pipe (32) away from the positioning column (31) is connected to a hydraulic machine integrated with the trailer, and a hydraulic piston (301) is slidably provided inside the liquid filling chamber (35).

8. The multifunctional transport multi-trailer train according to claim 7, characterized in that: A follower column (304) is fixedly arranged on the side of the hydraulic piston (301) away from the hydraulic connecting pipe (32); a guide path (36) is provided at one end of the follower column (304) away from the hydraulic piston (301); the follower column (304) is slidably connected to the positioning column (31); a return spring (39) is provided above one end of the follower column (304) close to the hydraulic piston (301); and a retracting groove (303) is provided on the upper wall of the follower column (304).

9. The multifunctional transport multi-trailer train according to claim 8, characterized in that: Each group of telescopic holes (33) comprises a telescopic hole 1 (331) and a telescopic hole 2 (332); side pressure grooves 1 (38) are provided on both sides of the telescopic hole 1 (331); the push column 1 (341) is slidably connected to the telescopic hole 1 (331); a push column 1 (302) is rotatably provided at the bottom end of the push column 1 (341); an end of the push column 1 (302) away from the push column 1 (341) is rotatably connected to the folding groove (303); and the thickness dimension of the side pressure groove 1 (38) is the same as the thickness dimension of the push column 1 (302).

10. The multifunctional transport multi-trailer train according to claim 9, characterized in that: The second telescopic hole (332) is slidably connected to the second pushing column (342), and the two sides of the second telescopic hole (332) are provided with a second side pressure groove (306). The bottom end of the second pushing column (342) is fixedly and rotatably provided with a second pushing column (307), and the end of the second pushing column (307) away from the second pushing column (342) is rotatably connected to the folding groove (303), and the thickness dimension of the second side pressure groove (306) is the same as the thickness dimension of the second pushing column (307).

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