Logistics carriage with automatic loading and unloading function

Abstract

The application discloses a logistics compartment with automatic loading and unloading functions, which comprises a cargo conveying unit; a cargo fixing unit is arranged on the placing plate; the cargo fixing unit is connected with a control structure; the cargo fixing unit can clamp and fix the transported cargo; the cargo fixing unit is introduced to stabilize the conveyed cargo, which effectively avoids the cargo from toppling over during the lifting process; for fragile or easily deformed cargos such as glass and ceramics, this design is particularly important; further, while fixing the cargo, damage to the cargo can be avoided; the application is especially suitable for fragile or surface-sensitive cargos; two movable conveying plates are adopted; this design enables the compartment to realize the functions of alternately loading and unloading cargos; and during the conveying of the cargos, the control structure automatically enables the cargo fixing unit to fix the cargos.

Description

Technical Field

[0001] This application relates to the field of logistics vehicle technology, and in particular to logistics vehicles with automatic loading and unloading functions. Background Technology

[0002] Logistics activities include the transportation, warehousing, packaging, handling, processing, distribution, and related logistics information of goods. During the logistics transportation process, corresponding logistics vehicles are usually required. The vehicles place the goods in their compartments, and after arriving at the destination, they need to carry out unloading and loading operations.

[0003] The existing patent document "CN108749681B A pickup truck body with loading function" discloses a cargo box. Although this cargo box can automatically load cargo, during actual loading and unloading, the staff needs to move the goods to the cargo conveying structure for loading. During the handling and placement of the goods, the goods are prone to instability due to misoperation, which can lead to tipping and rolling during the loading process. In particular, fragile goods may be damaged.

[0004] In other words, existing technologies have the following technical problems: ordinary automated loading mechanisms in freight cars tend to tip over and roll over during cargo transport due to unstable cargo placement. Therefore, a logistics freight car with automated loading and unloading functions is proposed to address these issues. Summary of the Invention

[0005] This embodiment provides a logistics carriage with automatic loading and unloading functions to solve the problem of tipping and rolling caused by unstable placement of goods in ordinary automatic loading mechanisms in the prior art during the transportation of goods.

[0006] According to one aspect of this application, a logistics vehicle with automatic loading and unloading function is provided, including a helmet body, a helmet liner, an insulating pad, a resistance heating wire, an auxiliary heating structure, and a windproof enclosure structure.

[0007] A helmet liner is fixedly connected to the inner wall of the helmet body, and the logistics vehicle with automatic loading and unloading function includes:

[0008] A cargo conveying unit is fixedly installed in the inner cavity of the carriage body. A placement plate is fixedly connected to the bottom end of the cargo conveying unit, and the cargo conveying unit can drive the placement plate to move up and down.

[0009] A cargo fixing unit is installed on the placement plate. The cargo fixing unit is connected to the control structure and can clamp and fix the transported cargo.

[0010] The placement plate is equipped with a balance reminder structure, which can provide a reminder when the center of gravity of the placed goods shifts.

[0011] Furthermore, the cargo conveying unit includes a fixed crossbeam, a fixed sleeve, a movable rod, a movable slider, and a traction cable. The fixed crossbeam is fixedly installed on the top wall of the inner cavity of the carriage body. A fixed sleeve is fixedly installed on the bottom surface of the fixed crossbeam. A movable rod is slidably connected to the inner cavity of the fixed sleeve. A movable slider is slidably connected to the inner cavity of the fixed crossbeam. A guide roller is rotatably connected to the side wall of the inner cavity of the fixed crossbeam. One end of the traction cable is fixedly connected to the side wall of the movable slider. The other end of the traction cable extends into the inner cavity of the fixed sleeve and is fixedly connected to the top end of the movable rod.

[0012] Furthermore, two fixed sleeves are provided, and the two fixed sleeves are respectively fixedly installed on both sides of the bottom surface of the fixed crossbeam. A movable rod is slidably installed in the inner cavity of each of the two fixed sleeves. A traction cable is fixedly connected to both sides of the movable slider, and the two traction cables are respectively fixedly connected to the top ends of the two movable rods.

[0013] Furthermore, a drive structure is installed on the fixed crossbeam. The drive structure includes a rotating disk, a servo motor, a connecting frame, a movable seat, and a connecting column. A guide groove is provided on the side wall of the fixed crossbeam, and a movable seat is slidably connected to the guide groove. The movable seat is fixedly connected to the movable slider. A connecting column is fixedly connected to the side wall of the movable seat. A rotating disk is rotatably connected to the side wall of the fixed crossbeam. One end of the connecting frame is rotatably connected to the side wall of the rotating disk. The other end of the connecting frame is rotatably connected to one end of the connecting column. A servo motor is fixedly installed on the side wall of the fixed crossbeam, and the end of the output shaft of the servo motor is fixedly connected to the center of the rotating disk.

[0014] Furthermore, connecting side plates are fixedly connected to both sides of the placement plate, and a connecting horizontal plate is fixedly connected between the top ends of the two connecting side plates. The connecting horizontal plate is fixedly connected to the bottom end of the moving rod.

[0015] Furthermore, the cargo securing unit includes a fixed side plate and an airbag structure. Two fixed side plates are provided, and an airbag structure is fixedly connected to the side wall of each of the two fixed side plates.

[0016] Furthermore, the airbag structure includes an airbag No. 1, an airbag No. 2, and an airbag No. 3. The airbags No. 1, No. 2, and No. 3 are all fixed to the side wall of the fixed side plate. The airbag No. 2 is located on both sides of the airbag No. 1, and the airbag No. 3 is located on both sides of the airbag No. 2. The height of the airbags No. 1, No. 2, and No. 3 increases sequentially. The inner cavities of the airbags No. 1, No. 2, and No. 3 are connected and communicated through a connecting tube No. 1. A connecting tube No. 2 is connected between the two connecting tubes No. 1.

[0017] Furthermore, the control structure includes a fixed base, a fixed side plate, a cross plate, a guide rod, a first contact plate, a fixed cylinder, a movable piston, a push rod, and a second contact plate. Two control structures are provided, each installed on one side of the inner cavity of the carriage body. The fixed side plate is fixed to the inner cavity side wall of the carriage body. A fixed base is fixedly connected to the top of the fixed side plate. Fixed cylinders are fixedly connected to both the upper and lower sides of the fixed base. Movable pistons are slidably disposed within the inner cavities of both fixed cylinders. One end of a push rod is fixedly connected to one side of each movable piston. The other end of the push rod penetrates the inner cavity wall of the fixed cylinder and extends outside the wall. A second contact plate is fixedly connected to one end of each push rod. A return spring is fixedly connected to one end of each movable piston. The other end of the return spring extends to the inner cavity wall of the fixed cylinder and is fixedly connected to it. The inner cavities of the two fixed cylinders are connected by a connecting pipe, and the connecting pipe is connected to the second connecting pipe by a flexible hose.

[0018] Furthermore, a horizontal plate is fixedly connected to the bottom end of the fixed side plate, and a guide rod is slidably connected to the horizontal plate. The bottom end of the guide rod is fixedly connected to the connecting horizontal plate, and a first contact plate is fixedly connected to the top end of the guide rod. The first contact plate and two second contact plates are on the same straight line.

[0019] Furthermore, the balance indication structure includes a balance plate, a fixed shaft, a support spring, a housing, a push-button switch, and an indicator light. A groove is provided at the center of the placement plate. A fixed shaft is fixedly connected to the inner wall of the groove, and the balance plate is rotatably connected to the fixed shaft. Support springs are fixedly connected to the bottom surfaces of both sides of the balance plate, and the support springs are fixedly connected to the bottom wall of the inner cavity of the placement plate. Housings are fixedly installed on both sides of the inner cavity of the placement plate. A top post is slidably connected to the inner cavity of the housing. One end of a spring is fixedly connected to the bottom surface of the top post, and the other end of the spring is fixedly connected to the bottom wall of the inner cavity of the housing. A push-button switch is fixedly installed on the bottom wall of the inner cavity of the housing. Indicator lights are fixedly connected to both sides of the placement plate, and the indicator light on one side is electrically connected to the push-button switch on the same side.

[0020] The above embodiments of this application introduce a cargo fixing unit to stabilize the transported cargo, effectively preventing the cargo from tipping over during the lifting process. This design is particularly important for fragile or easily deformable goods such as glass and ceramics. Furthermore, while fixing the cargo, it can prevent damage to the cargo, making it especially suitable for fragile or surface-sensitive goods. This application uses two vertically movable conveyor plates, which allows the carriage to alternately load and unload cargo. At the same time, during the cargo transport process, the control structure automatically fixes the cargo fixing unit to the cargo and automatically releases it when the cargo reaches the transport position, which greatly reduces the labor intensity of the workers. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application;

[0023] Figure 2 This is a schematic diagram of the structure of a cargo conveying unit according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the internal structure of a cargo conveying unit according to an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of the connection structure of the placement plate according to one embodiment of this application;

[0026] Figure 5 This is a top cross-sectional schematic diagram of a cargo securing unit according to an embodiment of this application;

[0027] Figure 6 This is a schematic diagram of the overall structure of a control structure according to this application;

[0028] Figure 7 This is a schematic diagram of the internal structure of a control structure according to this application;

[0029] Figure 8 This is a schematic diagram of the connection structure of a balance prompting structure according to this application;

[0030] Figure 9 This is a schematic diagram of a cross-sectional structure of a balance prompting structure according to this application;

[0031] Figure 10 For the purposes of this application Figure 9A magnified schematic diagram of the structure at point A;

[0032] In the diagram: 1. Cargo compartment body; 2. Cargo conveying unit; 3. Placement plate; 4. Cargo fixing unit; 5. Control structure; 6. Fixed crossbeam; 7. Fixed sleeve; 8. Moving rod; 9. Guide roller; 10. Moving slider; 11. Traction cable; 12. Guide chute; 13. Moving seat; 14. Connecting column; 15. Rotating disc; 16. Servo motor; 17. Connecting frame; 18. Connecting cross plate; 19. Connecting side plate; 20. Fixed side plate; 21. Airbag No. 1; 22. Airbag No. 2 23. No. 3 airbag; 24. No. 1 connecting tube; 25. No. 2 connecting tube; 26. Fixed base; 27. Fixed side plate; 28. Horizontal plate; 29. ​​Guide rod; 30. No. 1 contact plate; 31. Fixed cylinder; 32. Moving piston; 33. Push rod; 34. No. 2 contact plate; 35. Return spring; 36. Connecting tube; 37. Balance plate; 38. Fixed shaft; 39. Support spring; 40. Housing; 41. Top column; 42. Spring; 43. Press switch; 44. Indicator light. Detailed Implementation

[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application 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 can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0036] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0037] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0038] Please see Figure 1 As shown, a logistics vehicle with automatic loading and unloading function includes:

[0039] Cargo conveying unit 2 is fixedly installed in the inner cavity of the carriage body 1. A placement plate 3 is fixedly connected to the bottom end of the cargo conveying unit 2. The cargo conveying unit 2 can drive the placement plate 3 to move up and down.

[0040] A cargo fixing unit 4 is installed on the placement plate 3. The cargo fixing unit 4 is connected to the control structure 5. The cargo fixing unit 4 can clamp and fix the transported cargo.

[0041] The placement plate 3 is equipped with a balance reminder structure, which can provide a reminder when the center of gravity of the placed goods shifts.

[0042] Through the above technical solution, a cargo fixing unit 4 is introduced to stabilize the transported cargo, effectively preventing the cargo from tipping over during the lifting process. This design is particularly important for fragile or easily deformable goods such as glass and ceramics. Furthermore, while fixing the cargo, it can prevent damage to the cargo, making it especially suitable for fragile or surface-sensitive goods. This application uses two vertically movable conveyor plates. This design allows the carriage to alternately load and unload cargo. At the same time, during the cargo transport process, the control structure automatically fixes the cargo fixing unit 4 to the cargo and automatically releases it when it reaches the transport position, which greatly reduces the labor intensity of the staff.

[0043] For further technical solutions, please refer to Figure 2 and Figure 3 As shown, the cargo conveying unit 2 includes a fixed crossbeam 6, a fixed sleeve 7, a movable rod 8, a movable slider 10, and a traction cable 11. The fixed crossbeam 6 is fixedly installed on the top wall of the inner cavity of the carriage body 1. The fixed sleeve 7 is fixedly installed on the bottom surface of the fixed crossbeam 6. The movable rod 8 is slidably connected to the inner cavity of the fixed sleeve 7. The movable slider 10 is slidably connected to the inner cavity of the fixed crossbeam 6. A guide roller 9 is rotatably connected to the side wall of the inner cavity of the fixed crossbeam 6. One end of the traction cable 11 is fixedly connected to the side wall of the movable slider 10. The other end of the traction cable 11 extends into the inner cavity of the fixed sleeve 7 and is connected to the movable rod. The top of the slider 10 is fixedly connected to the traction cable 11, which can be moved by the movement of the slider 10, thereby moving the traction rod 8. The movement of the traction rod 8 can move the placement plate 3, thereby realizing the lifting and conveying function of goods and achieving the effect of automatic loading and unloading. There are two fixed sleeves 7, which are respectively fixedly installed on both sides of the bottom surface of the fixed crossbeam 6. The traction rod 8 is slidably installed in the inner cavity of each of the two fixed sleeves 7. The traction cable 11 is fixedly connected to both sides of the slider 10, and the two traction cables 11 are respectively fixedly connected to the top of the two traction rods 8.

[0044] A drive structure is mounted on the fixed crossbeam 6. The drive structure includes a rotating disk 15, a servo motor 16, a connecting frame 17, a movable seat 13, and a connecting column 14. A guide groove 12 is provided on the side wall of the fixed crossbeam 6. The movable seat 13 is slidably connected to the guide groove 12. The movable seat 13 is fixedly connected to the movable slider 10. The connecting column 14 is fixedly connected to the side wall of the movable seat 13. The rotating disk 15 is rotatably connected to the side wall of the fixed crossbeam 6. One end of the connecting frame 17 is rotatably connected to the side wall of the rotating disk 15. The other end of the connecting frame 17 is rotatably connected to one end of the connecting column 14. The servo motor 16 is fixedly mounted on the side wall of the fixed crossbeam 6. The end of the output shaft of the servo motor 16 is fixedly connected to the center of the rotating disk 15. Next, the servo motor 16 drives the rotating disk 15 to rotate, which in turn drives one end of the connecting frame 17 to move in a ring, thereby driving the connecting column 14 to move back and forth, which in turn drives the moving slider 10 to move back and forth. The left and right reciprocating motion of the moving slider 10 drives the moving rods 8 on both sides to rise and fall alternately, thus realizing the function of alternating loading and unloading. That is to say, when one placement plate moves up to unload, the other placement plate can move down to load. This alternating working method greatly improves the efficiency of cargo transportation. Compared with the traditional unidirectional conveying mechanism, this design not only improves efficiency, but also makes the carriage more flexible in the loading and unloading process, and can better adapt to different scenarios and needs.

[0045] For a preferred technical solution, please refer to Figure 4 and Figure 5 As shown, connecting side plates 19 are fixedly connected to both sides of the placement plate 3, and a connecting horizontal plate 18 is fixedly connected between the top ends of the two connecting side plates 19. The connecting horizontal plate 18 is fixedly connected to the bottom end of the moving rod 8. The cargo fixing unit 4 includes a fixing side plate 20 and an airbag structure. Two fixing side plates 20 are provided, and an airbag structure is fixedly connected to the side wall of each of the two fixing side plates 20. By expanding and contracting the airbag structure, the cargo can be clamped and fixed. Through the above technical solution, an airbag clamping method is adopted. This design can avoid damage to the cargo while fixing it, and is especially suitable for fragile or surface-sensitive cargo.

[0046] The airbag structure includes a first airbag 21, a second airbag 22, and a third airbag 23. All three airbags are fixed to the side wall of the fixed side plate 20. The second airbag 22 is positioned on both sides of the first airbag 21, and the third airbag 23 is positioned on both sides of the second airbag 22. The heights of the first, second, and third airbags increase sequentially. The inner cavities of the first, second, and third airbags 23 are connected and communicate with each other via a first connecting pipe 24. A second connecting pipe 25 connects the two first connecting pipes 24. The airbag structure is designed in a stepped manner, i.e., the top view is stepped. This design allows for a more complete fit and clamping of the surface of curved goods, providing a more stable fixation for smooth and fragile items such as ceramic flower pots and glass containers.

[0047] For specific technical solutions, please refer to Figure 6 and Figure 7 As shown, the control structure 5 includes a fixed base 26, a fixed side plate 27, a cross plate 28, a guide rod 29, a first contact plate 30, a fixed cylinder 31, a moving piston 32, a push rod 33, and a second contact plate 34. Two control structures 5 are provided, each installed on one side of the inner cavity of the carriage body 1. The fixed side plate 27 is fixed to the inner cavity side wall of the carriage body 1. The fixed base 26 is fixedly connected to the top of the fixed side plate 27. Fixed cylinders 31 are fixedly connected to both the upper and lower sides of the fixed base 26. A moving piston 32 is slidably disposed within the inner cavity of each of the two fixed cylinders 31. The movable piston 32 has one end of a push rod 33 fixedly connected to one side. The other end of the push rod 33 penetrates the inner wall of the fixed cylinder 31 and extends to the outside of the wall. A second contact plate 34 is fixedly connected to one end of each of the two push rods 33. A return spring 35 is fixedly connected to one end of each of the two movable pistons 32. The other end of the return spring 35 extends to the inner wall of the fixed cylinder 31 and is fixedly connected to the fixed cylinder 31. The inner cavities of the two fixed cylinders 31 are connected and communicated through a connecting pipe 36. The connecting pipe 36 is connected to the second connecting pipe 25 through a flexible hose.

[0048] A horizontal plate 28 is fixedly connected to the bottom end of the fixed side plate 27. A guide rod 29 is slidably connected to the horizontal plate 28. The bottom end of the guide rod 29 is fixedly connected to the connecting horizontal plate 18. A first contact plate 30 is fixedly connected to the top end of the guide rod 29. The first contact plate 30 and two second contact plates 34 are on the same straight line. When the placement plate 3 moves, it can drive the guide rod 29 to move simultaneously. The movement of the guide rod 29 can drive the first contact plate 30 to move. When the placement plate 3 moves to the bottom end, it can drive the first contact plate 30 to move to the second contact plate 34 below and press down the second contact plate 34. This causes the second contact plate 34 to drive the push rod 33 to move, which in turn drives the moving piston 32 to move. The movement of the moving piston 32 can cause the fixed cylinder 31 to draw gas from the airbag, thereby causing the airbag to be in a contracted state. This allows the clamped and fixed goods to be released and new goods to be released. The goods are placed between two goods fixing units 4. When the placement plate 3 moves upward, it causes the first contact plate 30 to separate from the second contact plate 34 on the lower side. This causes the moving piston 32 to move in the opposite direction through the action of the return spring 35, which pushes the gas back into the airbag. This allows the airbag to fully inflate, clamping and fixing the transported goods, thus providing stability. When the placement plate 3 moves to the upper end, it can cause the first contact plate 30 to contact the second contact plate 34 on the upper side and move the second contact plate 34 upward. Using the same technical principle, the airbag can be contracted and released again, making it easier to transport the goods into the carriage body 1. Through the above technical solution, the airbag automatically inflates to clamp and stabilize the goods during the transport process, and automatically releases when it reaches the transport position. This greatly reduces the labor intensity of the staff and improves work efficiency.

[0049] For further technical solutions, please refer to Figure 8 , Figure 9 and Figure 10As shown, the balance indicator structure includes a balance plate 37, a fixed shaft 38, a support spring 39, a housing 40, a push switch 43, and an indicator light 44. A groove is provided at the center of the placement plate 3. The fixed shaft 38 is fixedly connected to the inner wall of the groove of the placement plate 3. The balance plate 37 is rotatably connected to the fixed shaft 38. Support springs 39 are fixedly connected to the bottom surfaces of both sides of the balance plate 37. The support springs 39 are fixedly connected to the bottom wall of the inner cavity of the placement plate 3. A housing 40 is fixedly installed on both sides of the cavity. A top post 41 is slidably connected inside the cavity of the housing 40. One end of a spring 42 is fixedly connected to the bottom surface of the top post 41. The other end of the spring 42 is fixedly connected to the bottom wall of the cavity of the housing 40. A push switch 43 is fixedly installed on the bottom wall of the cavity of the housing 40. Indicator lights 44 are fixedly connected to both sides of the placement plate 3. The indicator light 44 on one side is electrically connected to the push switch 43 on the same side. When goods are placed, an indicator light 44 is required to be activated. The goods are placed on the upper surface of the placement plate 3 and the upper surface of the balance plate 37. When the goods shift, causing their center of gravity to shift, the balance plate 37 will flip to one side. When the balance plate 37 flips to one side, it can press down on the top column 41, which in turn contacts the press switch 43, triggering the press switch 43. This causes the indicator light 44 on the same side of the press switch 43 to light up. The lit indicator light 44 serves to remind the staff that the placed goods have shifted to one side, allowing the staff to readjust the position and angle of the goods so that the center of gravity of the goods is in a balanced position. This keeps the balance plate 37 horizontal and prevents it from shifting to both sides. That is, the lights on both sides are not lit. Through the above technical solution, it can remind the staff whether the goods are placed stably, avoiding the phenomenon of unstable placement caused by human operation, thereby improving the stability of the transportation process.

[0050] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A logistics vehicle with automatic loading and unloading function, characterized in that: The logistics vehicle with automatic loading and unloading function includes: Cargo conveying unit (2), the cargo conveying unit (2) is fixedly installed in the inner cavity of the carriage body (1), and a placement plate (3) is fixedly connected to the bottom end of the cargo conveying unit (2). The cargo conveying unit (2) can drive the placement plate (3) to move up and down. A cargo fixing unit (4) is installed on the placement plate (3). The cargo fixing unit (4) is connected to the control structure (5). The cargo fixing unit (4) can clamp and fix the transported cargo. A balance reminder structure is provided at the placement plate (3), which can remind you when the center of gravity of the placed goods shifts.

2. The logistics vehicle with automatic loading and unloading function according to claim 1, characterized in that: The cargo conveying unit (2) includes a fixed crossbeam (6), a fixed sleeve (7), a movable rod (8), a movable slider (10), and a traction cable (11). The fixed crossbeam (6) is fixedly installed on the top wall of the inner cavity of the carriage body (1). The fixed sleeve (7) is fixedly installed on the bottom surface of the fixed crossbeam (6). The movable rod (8) is slidably connected in the inner cavity of the fixed sleeve (7). The movable slider (10) is slidably connected in the inner cavity of the fixed crossbeam (6). The guide roller (9) is rotatably connected to the side wall of the inner cavity of the fixed crossbeam (6). One end of the traction cable (11) is fixedly connected to the side wall of the movable slider (10). The other end of the traction cable (11) extends into the inner cavity of the fixed sleeve (7) and is fixedly connected to the top end of the movable rod (8).

3. The logistics vehicle with automatic loading and unloading function according to claim 2, characterized in that: Two fixed sleeves (7) are provided. The two fixed sleeves (7) are respectively fixedly installed on both sides of the bottom surface of the fixed crossbeam (6). A moving rod (8) is slidably installed in the inner cavity of each of the two fixed sleeves (7). A traction cable (11) is fixedly connected to both sides of the moving slider (10). The two traction cables (11) are respectively fixedly connected to the top of the two moving rods (8).

4. The logistics vehicle with automatic loading and unloading function according to claim 3, characterized in that: A drive structure is installed on the fixed crossbeam (6). The drive structure includes a rotating disk (15), a servo motor (16), a connecting frame (17), a movable seat (13), and a connecting column (14). A guide groove (12) is provided on the side wall of the fixed crossbeam (6). A movable seat (13) is slidably connected to the guide groove (12). The movable seat (13) is fixedly connected to the movable slider (10). A connecting column (14) is fixedly connected to the side wall of the movable seat (13). A rotating disk (15) is rotatably connected to the side wall of the fixed crossbeam (6). One end of the connecting frame (17) is rotatably connected to the side wall of the rotating disk (15). The other end of the connecting frame (17) is rotatably connected to one end of the connecting column (14). A servo motor (16) is fixedly installed on the side wall of the fixed crossbeam (6). The end of the output shaft of the servo motor (16) is fixedly connected to the center of the rotating disk (15).

5. The logistics vehicle with automatic loading and unloading function according to claim 1, characterized in that: Both sides of the placement plate (3) are fixedly connected to connecting side plates (19), and a connecting horizontal plate (18) is fixedly connected between the top ends of the two connecting side plates (19). The connecting horizontal plate (18) is fixedly connected to the bottom end of the moving rod (8).

6. The logistics vehicle with automatic loading and unloading function according to claim 1, characterized in that: The cargo fixing unit (4) includes a fixing side plate (20) and an airbag structure. There are two fixing side plates (20), and an airbag structure is fixedly connected to the side wall of each of the two fixing side plates (20).

7. The logistics vehicle with automatic loading and unloading function according to claim 6, characterized in that: The airbag structure includes a first airbag (21), a second airbag (22), and a third airbag (23). The first airbag (21), the second airbag (22), and the third airbag (23) are all fixed to the side wall of the fixed side plate (20). The second airbag (22) is located on both sides of the first airbag (21), and the third airbag (23) is located on both sides of the second airbag (22). The heights of the first airbag (21), the second airbag (22), and the third airbag (23) increase sequentially. The inner cavities of the first airbag (21), the second airbag (22), and the third airbag (23) are connected and communicated through a first connecting pipe (24). A second connecting pipe (25) is connected between the two first connecting pipes (24).

8. The logistics vehicle with automatic loading and unloading function according to claim 1, characterized in that: The control structure (5) includes a fixed base (26), a fixed side plate (27), a cross plate (28), a guide rod (29), a first contact plate (30), a fixed cylinder (31), a moving piston (32), a push rod (33), and a second contact plate (34). There are two control structures (5), which are respectively installed on both sides of the inner cavity of the carriage body (1). The fixed side plate (27) is fixed to the inner cavity side wall of the carriage body (1). The fixed base (26) is fixedly connected to the top of the fixed side plate (27). The fixed cylinder (31) is fixedly connected to both the upper and lower sides of the fixed base (26). The inner cavities of the two fixed cylinders (31) are slidably arranged. A movable piston (32) is provided. One end of a push rod (33) is fixedly connected to one side of the movable piston (32). The other end of the push rod (33) passes through the inner wall of the fixed cylinder (31) and extends to the outside of the wall. A second contact plate (34) is fixedly connected to one end of each of the two push rods (33). One end of a return spring (35) is fixedly connected to each of the two movable pistons (32). The other end of the return spring (35) extends to the inner wall of the fixed cylinder (31) and is fixedly connected to the fixed cylinder (31). The inner cavities of the two fixed cylinders (31) are connected and communicated through a connecting pipe (36). The connecting pipe (36) is connected to the second connecting pipe (25) through a flexible hose.

9. The logistics vehicle with automatic loading and unloading function according to claim 8, characterized in that: A horizontal plate (28) is fixedly connected to the bottom end of the fixed side plate (27). A guide rod (29) is slidably connected to the horizontal plate (28). The bottom end of the guide rod (29) is fixedly connected to the connecting horizontal plate (18). A first contact plate (30) is fixedly connected to the top end of the guide rod (29). The first contact plate (30) and two second contact plates (34) are on the same straight line.

10. The logistics vehicle with automatic loading and unloading function according to claim 1, characterized in that: The balance indicator structure includes a balance plate (37), a fixed shaft (38), a support spring (39), a housing (40), a push switch (43), and an indicator light (44). A groove is provided at the center of the placement plate (3). A fixed shaft (38) is fixedly connected to the inner wall of the groove of the placement plate (3). The balance plate (37) is rotatably connected to the fixed shaft (38). Support springs (39) are fixedly connected to the bottom surfaces of both sides of the balance plate (37). The support springs (39) are fixedly connected to the bottom wall of the inner cavity of the placement plate (3). A housing (40) is fixedly installed on both sides of the inner cavity of the placement plate (3). A top column (41) is slidably connected in the inner cavity of the housing (40). One end of a spring (42) is fixedly connected to the bottom surface of the top column (41). The other end of the spring (42) is fixedly connected to the bottom wall of the inner cavity of the housing (40). A push switch (43) is fixedly installed on the bottom wall of the inner cavity of the housing (40). An indicator light (44) is fixedly connected to both sides of the placement plate (3). The indicator light (44) on one side is electrically connected to the push switch (43) on the same side.

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