Trailer weight distribution detection and adjustment method and apparatus

Abstract

The present application relates to a kind of trailer weight distribution detection and adjusting method and its device, adjusting method includes: first in not hitched trailer, obtain the front wheel normal tire pressure P1 and rear wheel normal tire pressure P2 in the driving state of tractor;Again after hitching trailer, real-time acquisition front wheel hitch tire pressure P1'and rear wheel hitch tire pressure P2'in the process of driving;After then, if P1 '<m×P1 And P2 '>b×P2, then prompt trailer weight distribution leans forward, vehicle deceleration brake, and move goods rearward;If m×P1 ≤P1'≤n×P1 And a×P2 ≤P2'≤b×P2, then prompt trailer weight distribution is in the middle, then keep vehicle driving state;If P1 '>n×P1 And P2 '

Description

Technical Field

[0001] This invention belongs to the field of vehicle automatic control technology, and relates to a method and apparatus for detecting and adjusting the weight distribution of a trailer. Background Technology

[0002] With the introduction of the C6 driver's license, the trailer market is developing favorably, with more and more ordinary passenger cars being used as towing vehicles. However, certain driving safety issues also exist when towing trailers. For example, when the towing vehicle turns too quickly, travels too fast, or the trailer is exposed to crosswinds, the trailer is prone to continuous swaying. Accumulated swaying can lead to irreversible consequences such as rollovers, commonly known as "death swaying." A significant reason for this phenomenon is the incorrect weight distribution of the trailer.

[0003] The weight distribution on a trailer has a significant impact on the stability of both the towing vehicle and the trailer as a whole. Typically, trailers are center-axle type, meaning the trailer's axle is located at its center of gravity, and they can be single-axle or double-axle. The trailer is connected to the towing vehicle via a trailer hitch. When loading onto a trailer, there are three main scenarios: first, the trailer's weight is concentrated at the front; second, the trailer's weight is concentrated on the middle axle; and third, the trailer's weight is concentrated at the rear. For example... Figure 1 As shown.

[0004] In the first scenario, when the tractor changes lanes or the trailer encounters lateral force, the tractor and trailer will sway as a whole. At speeds below 90 km / h, they are more likely to regain stability. At the same time, the tractor will "nose up," meaning the load on the front axle will decrease and the load on the rear axle will increase, which will weaken the steering function of the front axle, i.e., the steering shaft. Braking performance will also be affected. If it is a front-wheel drive vehicle, the driving force will also be weakened, which will have an adverse effect on the vehicle's operation.

[0005] In the second scenario, when the tractor changes lanes or the trailer encounters lateral forces, it is easy to maintain the overall stability of the tractor and trailer; at the same time, it has no impact on the front and rear axle loads of the tractor.

[0006] In the third scenario, when the towing vehicle changes lanes or the trailer encounters lateral force, it can cause the towing vehicle and trailer to sway violently, resulting in serious consequences. Simultaneously, it can cause the towing vehicle to "lift its rear end," meaning the front axle load increases while the rear axle load decreases. If it's a rear-wheel-drive vehicle, the driving force will be weakened, negatively impacting vehicle operation.

[0007] In summary, when using a trailer, it is necessary to obtain the weight distribution of the towing vehicle in a timely manner to avoid the problem of the towing vehicle going out of control due to incorrect weight distribution. Summary of the Invention

[0008] The object of the present invention is to provide a method and device for detecting and adjusting trailer weight distribution. As a method for detecting trailer weight distribution applied to a towing vehicle, the method can be pre-installed and used when passenger vehicles are manufactured, thereby avoiding adverse consequences caused by imperfect functions of retrofitted trailer equipment and the like.

[0009] The object of the present invention can be achieved by the following technical solutions:

[0010] According to a first aspect of the present invention, there is provided a trailer weight distribution detection method, comprising the following steps:

[0011] S1: when no trailer is coupled, obtain the normal tire pressure P1 of the front wheels and the normal tire pressure P2 of the rear wheels of the towing vehicle in a driving state;

[0012] S2: after coupling the trailer, obtain in real time the coupled front wheel tire pressure P1' and the coupled rear wheel tire pressure P2' during driving;

[0013] S3: if P1'<m×P1 and P2'>b×P2, prompt that the trailer weight distribution is forward-biased;

[0014] if m×P1≤P1'≤n×P1 and a×P2≤P2'≤b×P2, prompt that the trailer weight distribution is centered;

[0015] if P1'>n×P1 and P2'<a×P2, prompt that the trailer weight distribution is rearward-biased;

[0016] wherein m is within the range of 0.5 to 1, and n is within the range of 1 to 1.5; a is within the range of 0.5 to 1, and b is within the range of 1 to 1.5.

[0017] as a preferred technical solution, m is within the range of 0.8 to 1, and n is within the range of 1 to 1.2.

[0018] as a preferred technical solution, a is within the range of 0.8 to 1, and b is within the range of 1 to 1.2.

[0019] wherein,

[0020] According to a second aspect of the present invention, there is provided a detection device for implementing the trailer weight distribution detection method as described above, comprising:

[0021] a front tire pressure detection module and a rear tire pressure detection module, which are arranged on the towing vehicle and are respectively used for detecting the front tire pressure and the rear tire pressure;

[0022] a judgment module, which is in communication connection with the front tire pressure detection module and the rear tire pressure detection module, and is used for judging the trailer weight distribution according to the fed-back normal front wheel tire pressure P1, normal rear wheel tire pressure P2, coupled front wheel tire pressure P1' and coupled rear wheel tire pressure P2';

[0023] The output module, which communicates with the judgment module, is used to prompt the user with the judgment results of the trailer weight distribution.

[0024] As a preferred technical solution, the output module includes a display or a speaker.

[0025] According to a third aspect of the present invention, a method for adjusting the weight distribution of a trailer is provided, comprising the following steps:

[0026] A1: The weight distribution of the trailer is detected using the method described in any one of claims 1 to 3;

[0027] A2: If the weight distribution of the trailer is forward, the vehicle should slow down or stop and move the cargo backward until m×P1≤P1'≤n×P1 and a×P2≤P2'≤b×P2;

[0028] If the weight distribution of the trailer is in the middle, then the vehicle remains in motion;

[0029] If the weight distribution of the trailer is towards the rear, the vehicle will slow down or stop and move the cargo forward until m×P1≤P1'≤n×P1 and a×P2≤P2'≤b×P2.

[0030] Preferably, when the weight distribution of the trailer is not centered, the vehicle should be stopped to avoid the problem of incorrect judgment caused by the high-speed friction of the tires during vehicle movement, where the temperature change has a greater effect on the tire pressure than the weight change.

[0031] According to a fourth aspect of the present invention, an adjustment device is provided for implementing the trailer weight distribution adjustment method as described above, comprising:

[0032] The front tire pressure detection module and the rear tire pressure detection module are installed on the tractor and are used to detect the front tire pressure and the rear tire pressure respectively.

[0033] The judgment module is connected to the front tire pressure detection module and the rear tire pressure detection module. It is used to judge the weight distribution of the trailer based on the feedback of the normal tire pressure P1 of the front wheel and the normal tire pressure P2 of the rear wheel, as well as the tire pressure P1' of the front wheel and the tire pressure P2' of the rear wheel.

[0034] The output module, which communicates with the judgment module, is used to prompt the user with the judgment result of the trailer weight distribution.

[0035] The tractor control module communicates with the judgment module and is used to maintain the driving state or decelerate and brake the tractor based on the judgment result of the trailer weight distribution.

[0036] The trailer cargo movement module communicates with the judgment module and is used to move the cargo forward or backward based on the judgment result of the trailer weight distribution.

[0037] As a preferred technical solution, the output module includes a display or a speaker.

[0038] As a preferred technical solution, the trailer cargo moving module includes a conveyor belt mounted on the trailer for carrying cargo and having a front-to-back conveying function.

[0039] As a preferred technical solution, the trailer cargo moving module includes a robotic arm mounted on the trailer for transporting cargo.

[0040] Compared with the prior art, the present invention has the following characteristics:

[0041] This invention utilizes the phenomenon that the weight distribution of a trailer affects the load on the front and rear axles of the tractor. By combining this with the tractor's (i.e., a regular passenger vehicle) own tire pressure monitoring system, changes in tire pressure are monitored to determine the weight distribution of the trailer. This method allows the equipment to be pre-installed and used during the manufacturing process of regular passenger vehicles, thus avoiding adverse consequences caused by incomplete functionality in aftermarket trailer equipment. Attached Figure Description

[0042] Figure 1 This is a schematic diagram illustrating the impact of trailer weight distribution on the tractor's driving status.

[0043] Figure 2 This is a flowchart illustrating a method for adjusting the weight distribution of a trailer in an embodiment.

[0044] Figure 3 A block diagram of an exemplary electronic device capable of implementing the embodiments;

[0045] Figure 4 This is a force analysis diagram of the tractor and trailer. Detailed Implementation

[0046] 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, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0047] The term "one embodiment" or "an embodiment" referred to herein refers to a specific feature, structure or characteristic that can be included in at least one implementation of the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data may be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0048] Figure 1 is a flowchart of a trailer weight distribution adjustment method provided in an embodiment of the present invention. The present invention provides the method operation steps as described in the embodiments or flowcharts, but more or fewer operation steps may be included based on conventional or non-creative labor. The order of steps enumerated in the embodiments is only one of the orders in which numerous steps are executed, and does not represent the only execution order. The method can be implemented by means of software and / or hardware. Please refer to Figure 1 , a trailer weight distribution adjustment method in an embodiment of the present invention may include:

[0049] S1: When the trailer is not coupled, the towing vehicle is in a normal driving mode, and at this time, the normal tire pressure P1 of the front wheels and the normal tire pressure P2 of the rear wheels of the towing vehicle in the driving state are acquired;

[0050] S2: After coupling the trailer, receiving a user instruction, switching the driving mode of the towing vehicle to the traction driving mode, the system prompts to keep the loading condition of the towing vehicle unchanged, after confirmation, acquiring the coupled front wheel tire pressure P1' and the coupled rear wheel tire pressure P2' in real time during driving;

[0051] S3: If P1'<m×P1 and P2'>b×P2, prompting that the trailer weight distribution is forward-biased;

[0052] If m×P1≤P1'≤n×P1 and a×P2≤P2'≤b×P2, prompting that the trailer weight distribution is centered;

[0053] If P1'>n×P1 and P2'<a×P2, prompting that the trailer weight distribution is rearward-biased;

[0054] S4: If the weight distribution of the trailer is forward, the vehicle will decelerate and brake, and the cargo will be moved backward until m×P1≤P1'≤n×P1 and a×P2≤P2'≤b×P2;

[0055] If the weight distribution of the trailer is in the middle, then the vehicle remains in motion;

[0056] If the weight distribution of the trailer is towards the rear, the vehicle will decelerate and brake, and the cargo will be moved forward until m×P1≤P1'≤n×P1 and a×P2≤P2'≤b×P2.

[0057] Wherein, m is in the range of 0.5 to 1, preferably in the range of 0.8 to 1, more preferably in the range of 0.92 to 1; n is in the range of 1 to 1.5, preferably in the range of 1 to 1.2, more preferably in the range of 1 to 1.08; a is in the range of 0.5 to 1, preferably in the range of 0.8 to 1, more preferably in the range of 0.68 to 1; b is in the range of 1 to 1.5, preferably in the range of 1 to 1.2, more preferably in the range of 1 to 1.32.

[0058] The derivation process of the above preferred values ​​is as follows:

[0059] like Figure 4 As shown, typically, the tractor body is about 5000mm long, the wheelbase is about 3000mm, the distance from the rear wheel to the trailer hitch is about 1000mm, the distance from the trailer hitch to the front of the trailer box is about 1000mm, the distance from the front of the trailer box to the center axle of the trailer is about 2000mm, and the length of the trailer box is about 4000mm.

[0060] When the cargo is placed near point b, the vehicle "tilts up," and the force at point b is Fb. According to the lever principle, the downward force Fa of the towing ball joint at point a can be calculated. According to the lever principle, the downward force Fr generated by the rear wheel of the tractor and the upward force Ff generated by the front wheel can be calculated at this time.

[0061] When the cargo is placed near point d, the vehicle "lifts its rear end," and the force at point d is Fd. According to the lever principle, the downward force Fa at point a of the trailer ball joint can be calculated. Further, according to the lever principle, the downward force Fr generated by the rear wheels of the tractor and the upward force Ff generated by the front wheels can be calculated. The formulas are as follows:

[0062] When the goods are placed near point b,

[0063]

[0064]

[0065] When the goods are placed near point d,

[0066]

[0067]

[0068] Based on the formula, the components Ff and Fr of the cargo mass Fb / Fd acting on point b or d can be derived for the front axle and rear axle of the tractor. Furthermore, there is a relationship between the absolute values ​​of Ff and Fr: Fr = 4 * Ff, meaning the rear axle component is four times that of the front axle component, but in the opposite direction.

[0069] Based on common vehicle tire pressure data, the tire pressure difference between a half-load (3 people) and a full-load (5 people), i.e., 2 people weighing 150kg (according to the national standard, 1 person = 75kg), is 0.1-0.3 bar for the front axle and 0.5-1 bar for the rear axle. This means that a load of 150kg or more on the tractor unit will cause a significant change in tire pressure. Furthermore, according to the restrictions of a C6 driver's license, the maximum permissible total mass of the tractor unit and trailer cannot exceed 4500kg. Generally, to ensure the safety of trailer driving, the weight of the tractor unit must be greater than or equal to that of the trailer. Considering the case of a relatively small cargo weight, let's assume the maximum permissible total mass of the tractor unit is 3000kg and the maximum permissible total mass of the trailer is 1500kg, of which 1000kg is the trailer itself, leaving 500kg as cargo. Therefore, the weight on the tractor unit must be greater than 150kg.

[0070] In summary, a front axle load variation limit of 0.2 bar and a rear axle load variation limit of 0.8 bar are reasonable.

[0071] Generally, under normal conditions, when the tire pressure is 2.5 bar, 1.32 times the pressure is 3.3 bar, with a difference of 0.8 bar; when the tire pressure is 2.5 bar, 1.08 times the pressure is 2.7 bar, with a difference of 0.2 bar.

[0072] Therefore, the preferred values ​​are m within the range of 0.92 to 1, n within the range of 1 to 1.08, a within the range of 0.68 to 1, and b within the range of 1 to 1.32.

[0073] This embodiment provides a method for adjusting trailer weight distribution. It utilizes the phenomenon that the weight distribution of the trailer affects the front and rear axle loads of the tractor unit, and combines this with the tractor unit's (i.e., a regular passenger vehicle) own tire pressure monitoring system to monitor tire pressure changes, thereby determining the trailer weight distribution. This method allows the equipment to be pre-installed and used during the manufacturing process of regular passenger vehicles, thus avoiding adverse consequences caused by incomplete functionality in aftermarket trailer equipment.

[0074] The above is an introduction to the method embodiments. The following describes the solution of the present invention further through device embodiments.

[0075] This embodiment also relates to a trailer weight distribution adjustment device, including:

[0076] The front tire pressure detection module and the rear tire pressure detection module are installed on the tractor and are used to detect the front tire pressure and the rear tire pressure respectively.

[0077] The judgment module is connected to the front tire pressure detection module and the rear tire pressure detection module. It is used to judge the weight distribution of the trailer based on the feedback of the normal tire pressure P1 of the front wheel and the normal tire pressure P2 of the rear wheel, as well as the tire pressure P1' of the front wheel and the tire pressure P2' of the rear wheel.

[0078] The output module, which communicates with the judgment module, is used to prompt the user with the judgment result of the trailer weight distribution.

[0079] The tractor control module communicates with the judgment module and is used to maintain the driving state or decelerate and brake the tractor based on the judgment result of the trailer weight distribution.

[0080] The trailer cargo movement module communicates with the judgment module and is used to move the cargo forward or backward based on the judgment result of the trailer weight distribution.

[0081] Optionally, the output module can be a display or a speaker; the trailer cargo moving module can be a conveyor belt mounted on the trailer for carrying cargo and having a forward and backward conveying function, or a robotic arm for handling cargo. In use, the cargo in the trailer is moved forward or backward along the vehicle's direction of travel by the conveyor belt, or the position of all / part of the cargo or heavier cargo is adjusted by the robotic arm until the weight distribution of the trailer is centered.

[0082] It should be noted that the specific details and beneficial effects of the device in this application can be found in the above-described method embodiments, and will not be repeated here.

[0083] Figure 3 A schematic block diagram of an electronic device that can be used to implement embodiments of the present disclosure is shown. Figure 3 As shown, the electronic device of the present invention includes a central processing unit (CPU), which can perform various appropriate actions and processes according to computer program instructions stored in read-only memory (ROM) or loaded from a storage unit into random access memory (RAM). The RAM can also store various programs and data required for device operation. The CPU, ROM, and RAM are interconnected via a bus. Input / output (I / O) interfaces are also connected to the bus.

[0084] Multiple components in the device are connected to the I / O interface, including: input units such as keyboards, mice, and touchscreens; output units such as various types of displays and speakers; storage units such as disks and optical discs; and communication units such as network interface cards (NICs), modems, and wireless transceivers. The communication unit allows the device to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0085] The processing unit executes the various methods and processes described above, such as steps S1 to S4 of the method of the present invention. For example, in some embodiments, steps S1 to S4 of the method of the present invention may be implemented as a computer software program tangibly contained in a machine-readable medium, such as a storage unit. In some embodiments, part or all of the computer program may be loaded and / or installed on the device via ROM and / or a communication unit. When the computer program is loaded into RAM and executed by the CPU, one or more steps of steps S1 to S4 of the method of the present invention described above may be performed. Alternatively, in other embodiments, the CPU may be configured to execute steps S1 to S4 of the method of the present invention by any other suitable means (e.g., by means of firmware).

[0086] The functions described above in this document can be performed, at least in part, by one or more hardware logic components. For example, exemplary types of hardware logic components that can be used, without limitation, include: Field Programmable Gate Arrays (FPGAs), Application-Specific Integrated Circuits (ASICs), Application Standard Products (ASSPs), System-on-Chip (SoCs), Complex Programmable Logic Devices (CPLDs), and so on.

[0087] The program code used to implement the methods of the present invention can be written in any combination of one or more programming languages. This program code can be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing device, such that when executed by the processor or controller, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code can be executed entirely on the machine, partially on the machine, as a standalone software package partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0088] In the context of this invention, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media can include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0089] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.

Claims

1. A method for detecting trailer weight distribution, characterized in that, Includes the following steps: S1: When the trailer is not attached, obtain the normal tire pressure P1 of the front wheels and the normal tire pressure P2 of the rear wheels under the driving state of the tractor; the trailer has a single row of rear wheels; S2: After attaching a trailer, the front wheel tire pressure P1' and rear wheel tire pressure P2' are obtained in real time during the driving process; S3: If P1' < m×P1 and P2' > b×P2, then the trailer weight distribution is forward relative to the single-row rear wheels; If m×P1≤ P1' ≤ n×P1 and a×P2≤ P2' ≤ b×P2, then the trailer's weight distribution is centered relative to the single row of rear wheels. If P1' > n×P1 and P2' < a×P2, it indicates that the trailer's weight distribution is relatively rearward compared to the single-row rear wheels; Where m is in the range of 0.5 to 1, n is in the range of 1 to 1.5; a is in the range of 0.5 to 1, and b is in the range of 1 to 1.5; The values ​​of m, n, a, and b are determined based on the lever principle and national standards, and are obtained by measuring the difference in tire pressure between the front and rear wheels of the tractor under normal conditions, under full load and half load.

2. The method for detecting trailer weight distribution according to claim 1, characterized in that, m is in the range of 0.8 to 1, and n is in the range of 1 to 1.

2.

3. The method for detecting trailer weight distribution according to claim 1, characterized in that, a is in the range of 0.8 to 1, and b is in the range of 1 to 1.

2.

4. A detection apparatus for implementing the trailer weight distribution detection method as described in any one of claims 1 to 3, characterized in that, include: The front tire pressure detection module and the rear tire pressure detection module are installed on the tractor and are used to detect the front tire pressure and the rear tire pressure respectively. The judgment module is connected to the front tire pressure detection module and the rear tire pressure detection module. It is used to judge the weight distribution of the trailer based on the feedback of the normal tire pressure P1 of the front wheel and the normal tire pressure P2 of the rear wheel, as well as the tire pressure P1' of the front wheel and the tire pressure P2' of the rear wheel. The output module, which communicates with the judgment module, is used to prompt the user with the judgment results of the trailer weight distribution.

5. A detection device for implementing the trailer weight distribution detection method according to claim 4, characterized in that, The output module includes a display or a speaker.

6. A method for adjusting the weight distribution of a trailer, characterized in that, Includes the following steps: A1: The weight distribution of the trailer is detected using the method described in any one of claims 1 to 3; A2: If the weight distribution of the trailer is forward, the vehicle should slow down or stop and move the cargo backward until m×P1≤ P1' ≤ n×P1 and a×P2≤ P2' ≤ b×P2; If the weight distribution of the trailer is in the middle, then the vehicle remains in motion; If the weight distribution of the trailer is towards the rear, the vehicle will slow down or stop and move the cargo forward until m×P1≤ P1' ≤ n×P1 and a×P2≤ P2' ≤ b×P2.

7. An adjustment device for implementing the trailer weight distribution adjustment method as described in claim 6, characterized in that, include: The front tire pressure detection module and the rear tire pressure detection module are installed on the tractor and are used to detect the front tire pressure and the rear tire pressure respectively. The judgment module is connected to the front tire pressure detection module and the rear tire pressure detection module. It is used to judge the weight distribution of the trailer based on the feedback of the normal tire pressure P1 of the front wheel and the normal tire pressure P2 of the rear wheel, as well as the tire pressure P1' of the front wheel and the tire pressure P2' of the rear wheel. The output module, which communicates with the judgment module, is used to prompt the user with the judgment result of the trailer weight distribution. The tractor control module communicates with the judgment module and is used to maintain the driving state or decelerate and brake the tractor based on the judgment result of the trailer weight distribution. The trailer cargo movement module communicates with the judgment module and is used to move the cargo forward or backward based on the judgment result of the trailer weight distribution.

8. The adjusting device according to claim 7, characterized in that, The output module includes a display or a speaker.

9. The adjusting device according to claim 7, characterized in that, The trailer cargo moving module includes a conveyor belt mounted on the trailer for carrying cargo and having a front-to-back conveying function.

10. The adjusting device according to claim 7, characterized in that, The trailer cargo moving module includes a robotic arm mounted on the trailer for moving cargo.

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