A semi-trailer logistics van that uses solar energy for auxiliary power

Abstract

This invention discloses a semi-trailer logistics van that utilizes solar energy for auxiliary power. It includes a tractor unit and a semi-trailer frame connected together. Hub motors are installed in the driven wheels at the bottom of the semi-trailer frame, providing auxiliary power to the semi-trailer. Working in conjunction with the tractor unit, this enhances the vehicle's ability to navigate challenging road conditions such as inclines and declines. After the tractor unit separates from the semi-trailer, the semi-trailer can turn and move due to the speed difference between the hub motors on both sides. It can autonomously move to a designated loading / unloading position after detaching from the tractor unit, eliminating the need for reversing or other maneuvers on the tractor unit. The tractor unit simply pulls the semi-trailer to the vicinity of the designated loading / unloading position, thus improving loading and unloading efficiency to a certain extent. A generator housing with solar panels is also installed on the trailer, providing the necessary electrical energy to the hub motors and other power components, effectively increasing the vehicle's driving range. The generator housing also includes a cleaning drum, allowing the solar panels to be moved to the cleaning drum for cleaning, improving surface cleanliness and ensuring power generation performance.

Description

Technical Field

[0001] This invention relates to the field of hybrid-drive new energy vehicles, specifically a semi-trailer logistics van that utilizes solar energy to provide auxiliary power. Background Technology

[0002] A semi-trailer is a trailer with its axle positioned behind the vehicle's center of gravity and equipped with a connecting device that transmits horizontal and vertical forces to the tractor. It is primarily used for transporting large, difficult-to-disassemble cargo. Compared to monocoque trucks, semi-trailers improve the overall economic efficiency of road transport and play a role in promoting the organization of logistics in my country. However, existing semi-trailers lack a power unit and rely solely on the tractor for propulsion. This leads to uneven load distribution when climbing hills or in harsh road conditions, easily affecting the semi-trailer's normal operation. Loading and unloading also requires the tractor to reverse to move the semi-trailer to the designated position. Due to the semi-trailer's length, the visibility is poor when reversing and turning, significantly reducing overall loading and unloading efficiency.

[0003] To address the aforementioned issues, those skilled in the art have proposed the idea of ​​installing a drive unit on the trailer. This unit would share power with the tractor unit when driving on slopes, improving the semi-trailer's climbing performance. It would also allow the trailer to move independently during loading and unloading within the yard, without the need for a tractor unit. This idea can be implemented in two ways: first, by installing an independent engine, steering, and transmission system on the trailer to control the wheel steering and power output; second, by installing hub motors on both sides of the trailer's wheels, outputting power through the hub motors and controlling the trailer's steering by controlling the rotation direction and speed of the wheels. In the first method, the engine and steering system require independent fuel tanks, steering wheels, accelerator and brake pedals, and other hydraulic and mechanical transmission devices on the trailer to achieve independent movement. During normal driving on inclines, the accelerator and brakes need to be controlled from the cab, requiring complex transmission and switching schemes, making implementation difficult and manufacturing costs high. In the second method, the trailer's hub motor only needs to be connected to the remote control and the tractor's cab via circuitry to enable independent movement and normal driving of the trailer. Given the current maturity of new energy vehicle development and the availability of mature control and remote control solutions, the second method is significantly easier to implement than the first. Therefore, electric power assist has been identified as a key area for improvement in semi-trailer vehicles. However, a major challenge currently hindering the development of electric power assist semi-trailers is the limited battery capacity powering the hub motor. Recharging is a crucial issue for these vehicles during long-distance transport. While my country's existing charging stations for new energy vehicles have achieved a high coverage rate, these stations primarily serve small new energy vehicles. The semi-trailer's length of over ten meters, width of over 2.5 meters, and the connection between the tractor and trailer limit its maneuverability in confined spaces. Therefore, most charging stations do not allow semi-trailers to enter. Under these circumstances, the development of electric power assist semi-trailers necessitates the introduction of solar charging.

[0004] When transporting goods by road to the central and western regions of my country, there are many uphill sections and the route passes through several desert areas. These areas are prone to sandstorms, and solar panels are easily covered by sand and dust when they encounter sandstorms, which significantly reduces the charging speed. If the solar panels are stopped to be cleaned, the delivery time will be significantly extended. Summary of the Invention

[0005] The purpose of this invention is to provide a semi-trailer logistics van that utilizes solar energy for auxiliary power. A hub motor is installed in the driven wheel of the semi-trailer to provide auxiliary power for the semi-trailer to travel together with the tractor. After the tractor and the semi-trailer are separated, the semi-trailer can move to the designated position for loading and unloading under the drive of the hub motor. During the journey, the battery can be recharged by solar energy. When the solar panels are covered by sand and dust, they can be cleaned while driving, thus solving the problems in the prior art.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: a semi-trailer logistics van that uses solar energy to provide auxiliary power, including a tractor and a semi-trailer frame connected together. The tractor is equipped with a traction wheel at the bottom, and the semi-trailer frame is equipped with a driven wheel at the bottom. A hub motor is installed in the driven wheel. Vertically retractable outriggers are installed on both sides of the semi-trailer frame near the tractor. The bottom of the outriggers is equipped with a movable wheel. A closed cargo box is installed on the semi-trailer frame. A generator box is installed on the top of the cargo box. Several solar panels are installed in the generator box. A horizontally arranged roller shutter is installed on the upper part of the generator box. The solar panels are located below the roller shutter. A cleaning drum is installed at the front end of the generator box. Each solar panel can move to the position of the cleaning drum for cleaning. An on-board power supply is also provided in the cargo box. The solar panels are connected to the on-board power supply and the hub motor through power transmission lines. The generator housing contains a first guide plate arranged side-by-side, with a corresponding second guide plate on its upper side. A guide groove is formed between the first and second guide plates. The solar panel is located between the two guide plates. Rollers are mounted on both sides of the solar panel via axles. The sides of the rollers have grooves that clamp the first and second guide plates. An inclined groove that mates with the rollers is also formed on the first guide plate. A first elastic contact piece is installed inside the generator housing between the first guide plates, and a second elastic contact piece is located at the bottom of the solar panel. When the wheel is located in the inclined groove, the second elastic contact piece contacts the first elastic contact piece to form a passage. A reciprocating slider is also provided on the outside of the first guide plate. A solenoid valve is installed on the slider, and a lever is connected to the output shaft of the solenoid valve. A horizontally arranged channel steel frame is installed on the roller's rotating shaft. When the solenoid valve is energized, the lever moves upward into the channel steel frame, lifting the frame and moving the roller from the inclined groove to the guide groove. When the slider moves towards the cleaning drum, it pulls the solar panel across the inclined groove containing the roller to the cleaning drum position. A drive chain is installed inside the generator box outside the first guide plate, with sprockets fitted at both ends. The slider is fixedly mounted on the drive chain. A first motor is installed inside the generator box, and the output shaft of the first motor is connected to the rotating shaft of one of the sprockets. The vehicle power supply is connected to the first motor via a power transmission line. The slider is equipped with a T-shaped guide block, and the box wall of the generator box is provided with a T-shaped guide groove that matches the T-shaped guide block. A first conductive plate is provided in the T-shaped guide groove, and a second conductive plate that contacts the first conductive plate is installed on the slider. The second conductive plate is connected to the solenoid valve through a circuit. When the first conductive plate is energized, the lever on the solenoid valve can rise vertically.The interior of the carriage is equipped with a pull-out storage shelf. Racks are installed on both sides of the storage shelf along its length. Second motors are installed on both sides of the carriage, and the output shafts of the second motors have gears that mesh with the racks. The vehicle's power supply is connected to the second motors via power lines. When the second motors start, they move the storage shelf in and out of the carriage. A first stop is fixed at the front end of the storage shelf, and a rotatable second stop is installed at the rear end. After the storage shelf is pulled out of the carriage, the second stop rotates to contact the ground, providing support. The second stop is hinged to the end of the storage shelf. A support wheel is installed on the upper part of the second stop, and a limiting post is located on the side of the second stop. A rotatable hook is hinged to the storage shelf. When the hook is attached to the limiting post, the second stop is in a vertical position, either above or below the storage shelf. A cleaning water tank is installed at the front end of the generator housing, and an electric water pump is installed inside the cleaning water tank. A spray pipe is installed on the outlet of the electric water pump, and the drain outlet of the spray pipe is located at the rear of the cleaning drum. A third motor is also installed at the front end of the generator housing. A roller shaft is installed on the output shaft of the third motor. One end of the roller blind along its length is fixed to the roller shaft, and a traveling wheel is installed on the other end along its length. A fourth motor is installed on the shaft of the traveling wheel. A guide rail groove that cooperates with the traveling wheel is opened on the top of the generator housing. When the third motor is started, it can drive the roller blind to rotate onto the roller shaft and expose the solar panel at the bottom. The electric water pump, the third motor, and the fourth motor are all connected to the vehicle power supply through power transmission lines.

[0007] The positive effects of this invention are as follows: The semi-trailer logistics van utilizing solar energy for auxiliary power includes a connected tractor and a semi-trailer frame. Hub motors are installed in the driven wheels at the bottom of the semi-trailer frame, providing auxiliary power to the semi-trailer. Working together with the tractor, this improves the vehicle's ability to pass through challenging road conditions such as inclines and declines. After the tractor and semi-trailer separate, the semi-trailer can turn and move due to the speed difference between the hub motors on both sides. It can autonomously move to the designated loading / unloading position after detaching from the tractor, eliminating the need for reversing or other operations on the tractor. The tractor simply pulls the semi-trailer to the vicinity of the designated loading / unloading position, thus improving loading and unloading efficiency to a certain extent. A generator housing with solar panels is also installed on the trailer, providing the necessary electrical energy to the hub motors and other power components, effectively increasing the vehicle's driving range. Furthermore, a cleaning drum is installed inside the generator housing, allowing the solar panels to be moved to the cleaning drum for cleaning, improving surface cleanliness and ensuring power generation performance. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the present invention;

[0009] Figure 2 yes Figure 1 Top view;

[0010] Figure 3 This is a top sectional view of the generator housing;

[0011] Figure 4 yes Figure 3 A partial view of the sectional view along the AA direction;

[0012] Figure 5 yes Figure 3 Sectional view along the BB direction;

[0013] Figure 6 yes Figure 5 A magnified view of part of I;

[0014] Figure 7 This is a schematic diagram showing the state of the roller entering the guide groove from the inclined groove;

[0015] Figure 8 This is a schematic diagram showing the state of the solar panel as it moves to the cleaning drum position.

[0016] Figure 9 This is a diagram showing the storage rack inside the carriage in its extended position.

[0017] Figure 10 yes Figure 9 A magnified view of part II;

[0018] Figure 11 This is a schematic diagram showing the state of the semi-trailer frame after it has been separated from the tractor unit;

[0019] Figure 12 It is a simplified diagram showing the wiring connections between the vehicle's power supply and various electrical components. Detailed Implementation

[0020] The present invention describes a semi-trailer logistics van that utilizes solar energy for auxiliary power, such as... Figure 1 and Figure 2 As shown, the vehicle includes a tractor unit 1 and a semi-trailer frame 2 connected to each other. The tractor unit 1 is equipped with a tractor wheel 3 at the bottom, and the semi-trailer frame 2 is equipped with a driven wheel 4 at the bottom. A hub motor 5 is provided in the driven wheel 4. The hub motor 5 can provide auxiliary power to the semi-trailer frame 2 to achieve normal assistance when going uphill or braking when going downhill, so as to ensure the normal movement of the vehicle.

[0021] The semi-trailer frame 2 is equipped with vertically retractable outriggers 6 on both sides near the tractor unit 1. Each outrigger 6 has a caster wheel 7 at its bottom. When the vehicle is moving normally, the outriggers 6 are retracted and do not affect the vehicle's movement. When it is necessary to separate the tractor unit 1 and the semi-trailer frame 2, the outriggers 6 are adjusted to lower them, allowing the caster wheels 7 to contact the ground and provide support. The outriggers 6 are then used to raise the semi-trailer frame 2 to the designated dismantling height. The connecting mechanism between the tractor unit 1 and the semi-trailer frame 2 can then be disassembled. The outriggers 6 can be existing telescopic cylinder support feet, or they can be composed of a dual-speed gearbox, support sleeve, support rod, transmission screw, and support plate, providing support after the semi-trailer is detached from the tractor unit to ensure the vehicle's stability when stationary.

[0022] The tractor unit 1 can be driven away directly after being disassembled. The hub motors 5 inside the semi-trailer frame 2 can provide the necessary power for the movement of the semi-trailer. When there is a speed difference between the hub motors 5 on both sides, the semi-trailer can turn, ensuring that the semi-trailer can move to the designated loading and unloading position without the need for the tractor unit 1 to drive it, which improves the efficiency of logistics transportation and loading and unloading to a certain extent. The hub motor 5 and the driven wheel 4 can also be equipped with the electric drive axle, differential, shift fork, axle housing, wheel hub, drive motor, bracket and connecting rod, etc., as described in Chinese Patent No. CN202311310728.X: An Electric Drive Axle Unit for Vehicle Assistance, thereby realizing the electric power drive of the driven wheel 4.

[0023] An enclosed cargo box 8 is installed on the semi-trailer frame 2. The cargo box 8 is used for loading goods, and a generator box 9 is installed on the top of the cargo box 8. Figure 3 As shown, several solar panels 10 are installed inside the power generation housing 9. The solar panels 10 can receive sunlight and convert it into electrical energy for storage. A horizontally arranged roller shutter 11 is installed on the upper part of the power generation housing 9, and the solar panels 10 are located under the roller shutter 11. When it is necessary to use the solar panels 10 to generate electricity, the roller shutter 11 is opened to expose the solar panels 10 at the bottom. When encountering extreme weather such as hail during driving, the roller shutter 11 can be closed to provide necessary protection for the solar panels 10 inside.

[0024] To prevent dust and other contaminants from accumulating on the solar panels 10 and affecting their power generation performance, a cleaning drum 12 is installed at the front of the power generation box 9. Each solar panel 10 can be moved to the cleaning drum 12 for cleaning. An on-board power supply 44 is also installed inside the vehicle compartment 8. The solar panels 10 are connected to the on-board power supply 44 and the hub motor 5 via power transmission lines. The on-board power supply 44 also has an inverter circuit for charging and discharging, enabling the storage and use of the converted electrical energy.

[0025] The above-mentioned structure enables the vehicle to generate electricity during operation, providing the necessary power for the auxiliary drive of the hub motor 5. Due to the hub motor 5 on the semi-trailer, after the driver has transported the goods to the logistics park, there is no need to perform complex operations such as reversing the tractor 1 to reach the designated unloading point. Once the logistics point is reached, the tractor 1 and the semi-trailer frame 2 can be separated, allowing the driver to rest or return home as soon as possible. The disassembled semi-trailer frame 2 can be moved to a designated location for unloading goods under the drive of the hub motor 5. This reduces the labor intensity of the staff and improves the overall transportation and loading / unloading efficiency.

[0026] Furthermore, in order to enable each solar panel 10 to move to the cleaning drum 12 for surface cleaning, and to enable the solar panels 10 to move and reset after cleaning, as follows: Figure 4 and Figure 5 As shown, the generator box 9 has a first guide plate 13 arranged side by side inside, and a corresponding second guide plate 14 is provided on the upper side of the first guide plate 13. A guide groove 15 is formed between the first guide plate 13 and the second guide plate 14, and the solar panel 10 is located between the two guide plates.

[0027] Rollers 16 are mounted on both sides of the solar panel 10 via axles. The sides of the rollers 16 are provided with grooved plates 17. The grooved plates 17 are clamped on the first guide plate 13 and the second guide plate 14. The first guide plate 13 and the second guide plate 14 limit the rollers 16 in the width direction.

[0028] A groove 18 is provided on the first guide plate 13 to cooperate with the roller 16. A first elastic contact piece 19 is installed in the generator housing 9 between the first guide plates 13. A second elastic contact piece 20 is provided at the bottom of the solar panel 10. When the roller 16 is located in the groove 18, the second elastic contact piece 20 contacts the first elastic contact piece 19 to form a passage. At this time, the solar panel 10 is in the positioning and power generation state. Under the condition that no external force is applied, the roller 16 is located in the groove 18 and is in a stable state. The setting of the elastic contact piece has a certain elastic floating error range, which facilitates the electrical connection between the solar panel 10 and the power generation line and is less affected by movement.

[0029] A reciprocating slider 21 is provided on the outer side of the first guide plate 13. A solenoid valve 22 is installed on the slider 21, and a lever 23 is connected to the output shaft of the solenoid valve 22. When the solenoid valve 22 is energized, the lever 23 can move vertically upward. A horizontally arranged channel steel frame 24 is installed on the rotating shaft of the roller 16. The channel steel frame 24 is located on the outer side of the guide plate. When the solenoid valve 22 is energized, the lever 23 can move upward and enter the channel steel frame 24, and lift the channel steel frame 24 upward, so that the roller 16 moves from the inclined groove 18 to the guide groove 15.

[0030] When slider 21 moves toward the cleaning drum 12, the upward-moving lever 23 pulls the channel steel frame 24 to move together, and can cross the inclined trough 18 equipped with rollers 16 to move to the position of the cleaning drum 12. After cleaning is completed, slider 21 moves in the opposite direction, which can pull the channel steel frame 24 and the solar panel 10 to the position of the empty inclined trough 18. Then, the solenoid valve 22 is de-energized and the lever 23 retracts. Under the action of gravity, the rollers 16 descend to the bottom of the inclined trough 18, realizing the positioning and placement of the solar panel 10.

[0031] To enable the reciprocating movement of the slider 21, a transmission chain 25 is installed inside the generator housing 9 on the outer side of the first guide plate 13. Sprockets 26 are installed at both ends of the transmission chain 25. The slider 21 is fixedly mounted on the transmission chain 25. A first motor 27 is installed inside the generator housing 9. The output shaft of the first motor 27 is connected to the shaft of one of the sprockets 26. The vehicle power supply 44 is connected to the first motor 27 through a power transmission line. When the first motor 27 starts to rotate forward or reverse, it can drive the slider 21 to move reciprocally.

[0032] To ensure the stability of the vertical lifting and lowering of the solar panel 10, two sets of rollers 16 are installed on both sides of each solar panel 10. A slider 21 can be fixedly installed on the transmission chain 25. Two solenoid valves 22 are set on the slider 21. The levers 23 of the two solenoid valves 22 correspond to the two channel steel frames 24 on the same side of a solar panel 10.

[0033] In the above-described solar panel 10, when generating electricity, the rollers 16 are all located in the inclined groove 18, and under their own weight, the first elastic contact 19 and the second elastic contact 20 are in contact to form an electrical circuit, storing the converted electrical energy in the vehicle power supply 44. The angle of the inclined groove 18 is relatively large, so even if the vehicle is driving on a downhill section, the solar panel 10 will be stably located in the inclined groove 18 under its own weight, and will not move into the guide groove 15.

[0034] When a large amount of dirt accumulates on the surface of one of the solar panels 10, affecting its power generation performance, it needs to be moved to the front cleaning drum 12. After cleaning, it needs to be moved back to its initial position for reset. The process of achieving the above actions is as follows: First, the first motor 27 starts and drives the transmission chain 25 to rotate, allowing the slider 21 to move to the bottom position of the channel steel frame 24 where the solar panel 10 needs to be cleaned. Then, the transmission chain 25 stops rotating, the solenoid valve 22 on the slider 21 is energized, the bending rod 23 extends upward and enters the channel steel frame 24, and drives the roller 16 to move from the inclined groove 18 to the guide groove 15. Then, the transmission chain 25 continues to rotate, the bending rod 23 moves to contact the vertical plate in front of the channel steel frame 24 and pulls it forward together. The transmission chain 25 drives the slider 21 to continue to move forward, and the bending rod 23 on the slider 21 can also synchronously drive the solar panel 10 to move forward in the guide groove 15. Moreover, the bending rod 23 after moving upward will not be interfered with by the channel steel frame 24 on the front solar panel 10.

[0035] The roller 16 of the solar panel 10 is located in the inclined groove 18. When the solar panel 10 to be cleaned moves through the inclined groove 18 in the guide groove 15, the groove plates 17 on both sides of the roller 16 will first contact the groove plates 17 located in the inclined groove 18. During rotation, after the groove plates 17 separate, the roller 16 crosses the inclined groove 18 and contacts the top plane of the first guide plate 13. The roller 16 moves horizontally throughout the entire process and will not fall into the inclined groove 18. When the solar panel 10 moves to the front end of the guide groove 15, the drive chain 25 stops rotating. At this time, the solar panel 10 is located at the bottom of the cleaning drum 12, which can realize the cleaning of dirt on the surface of the solar panel 10.

[0036] After cleaning, the transmission chain 25 rotates in the reverse direction, and the bending rod 23 moves to contact the vertical plate at the rear end of the channel steel frame 24, driving the solar panel 10 to move in the reverse direction within the guide groove 15. After the solar panel 10 moves in the reverse direction to the initial position, the rollers 16 on both sides are located at the upper part of the inclined groove 18. Subsequently, the solenoid valve 22 is de-energized, the bending rod 23 retracts and separates from the channel steel frame 24, and under the action of gravity, the rollers 16 fall into the inclined groove 18. The second elastic contact piece 20 at the bottom of the solar panel 10 re-contacts the first elastic contact piece 19 to form an electrical circuit. Thus, the movement and reset of the solar panel 10 after cleaning is completed.

[0037] When the transmission chain 25 drives the slider 21 to move synchronously, the slider 21 will sway irregularly due to insufficient chain tension, which will affect the normal pulling of the folding rod 23 on the channel steel frame 24. To solve the above problem, a T-shaped guide block 28 is installed on the slider 21, and a T-shaped guide groove 29 that cooperates with the T-shaped guide block 28 is opened on the box wall of the generator box 9, so as to achieve stable guidance for the movement of the slider 21.

[0038] To achieve power-on / off control of the slider 21 during its movement and ensure the corresponding action of the solenoid valve 22, a first conductive plate 30 is provided in the T-shaped guide groove 29, and a second conductive plate 31 that contacts the first conductive plate 30 is installed on the slider 21. The second conductive plate 31 is connected to the solenoid valve 22 through a circuit. When the first conductive plate 30 is energized, the lever 23 on the solenoid valve 22 can rise vertically. A power-on / off control circuit can be set on the first conductive plate 30 to achieve corresponding control of the extension and retraction of the solenoid valve 22.

[0039] Furthermore, to facilitate the loading and unloading of goods inside the carriage 8, a pull-out storage rack 32 is installed inside the carriage 8. Racks 33 are provided on both sides of the storage rack 32 along its length. Second motors 34 are installed on both sides of the carriage 8. Gears 35 that mesh with the racks 33 are provided on the output shaft of the second motors 34. The vehicle power supply 44 is connected to the second motors 34 via power lines. When the second motors 34 are started, they can move the storage rack 32 in and out of the carriage 8. A first stop 36 is fixedly installed at the front end of the storage rack 32, and a rotatable second stop 37 is installed at the rear end of the storage rack 32. After the storage rack 32 is pulled out of the carriage 8, the second stop 37 can rotate to contact the ground and provide support.

[0040] When loading goods using the aforementioned storage rack 32, the second motor 34 is activated to move the rear end of the storage rack 32 out of the carriage 8, and the second stop 37 is rotated to contact the ground, providing support for the storage rack 32. Workers can then position themselves at the end of the carriage 8 to load goods onto the storage rack 32. The first stop 36 serves as a reference for loading. After loading a certain amount of goods, the second motor 34 reverses, causing the storage rack 32, now loaded with goods, to enter the carriage 8. This segmented repetition of the operation allows for loading without requiring workers to enter the carriage 8, reducing workload and improving loading efficiency. Unloading goods follows a similar process. The second motor 34 extends the storage rack 32, loaded with goods, segment by segment out of the carriage 8. Workers can unload goods at the end of the carriage 8 without needing to enter the carriage.

[0041] Furthermore, such as Figure 10As shown, the second stop 37 is mounted on the end of the storage rack 32 via a hinge shaft 47. A support wheel 48 is installed on the upper end of the second stop 37, and a limiting post 49 is provided on the side of the second stop 37. A rotatable hook rod 50 is hinged to the storage rack 32. When the hook rod 50 is hooked onto the limiting post 49, the second stop 37 is in a vertical state above or below the storage rack 32. When the storage rack 32 is pulled out, the second stop 37 rotates to the lower position of the storage rack 32, and the support wheel 48 contacts the ground. Hooking the hook rod 50 onto the limiting post 49 can limit the use of the second stop 37. When the storage rack 32 is pushed into the carriage 8, the hook rod 50 needs to be separated from the limiting post 49 first, then the second stop 37 needs to be rotated upward to a vertical state, and then the hook rod 50 can be hooked onto the limiting post 49 to limit the use of the second stop 37. A limiting flange can be provided at the hinge position between the second stop 37 and the storage rack 32, so that the second stop 37 can rotate to the limit position when it is perpendicular to the storage rack 32. With the help of the hook rod 50, the rotation of the second stop 37 can be limited.

[0042] Furthermore, a cleaning water tank 38 is installed at the front end of the power generation box 9, and an electric water pump 39 is installed inside the cleaning water tank 38. A spray pipe 40 is installed on the outlet of the electric water pump 39, and the drain outlet of the spray pipe 40 is located at the rear side of the cleaning drum 12. By pumping water from the cleaning water tank 38 to clean the surface of the solar panel 10, the cleaning efficiency and quality of the solar panel 10 can be effectively improved.

[0043] Furthermore, to enable the horizontal movement of the roller shutter 11 on top of the generator housing 9, a third motor 41 is installed at the front end of the generator housing 9. A roller shaft 42 is installed on the output shaft of the third motor 41. One end of the roller shutter 11 along its length is fixed to the roller shaft 42, and a traveling wheel 45 is installed at the other end of the roller shutter 11 along its length. A fourth motor 46 is installed on the shaft of the traveling wheel 45. A guide rail groove 43 that cooperates with the traveling wheel 45 is opened on the top of the generator housing 9. The electric water pump 39, the third motor 41, and the fourth motor 46 are all connected to the vehicle power supply 44 through power transmission lines.

[0044] When the third motor 41 starts, it drives the roller blind 11 to rotate onto the roller shaft 42, exposing the solar panel 10 at the bottom. When the fourth motor 46 starts, it drives the roller blind 11 away from the roller shaft 42, covering the upper part of the solar panel 10 and providing necessary protection. A fairing can also be installed on the top of the tractor 1. The height of the fairing is greater than the height of the roller that houses the roller blind 11. During driving, the fairing can protect the vehicle from significant wind resistance or impacts from debris such as sand and gravel.

[0045] The technical solutions of this invention are not limited to the embodiments described herein. All technical contents not described in detail herein are well-known technologies.

Claims

1. A semi-trailer logistics van that utilizes solar energy for auxiliary power, characterized in that: The system includes a tractor (1) and a semi-trailer frame (2) connected to each other. A tractor wheel (3) is installed at the bottom of the tractor (1), and a driven wheel (4) is installed at the bottom of the semi-trailer frame (2). A hub motor (5) is installed in the driven wheel (4). Vertically extendable outriggers (6) are installed on both sides of the semi-trailer frame (2) near the tractor (1). A movable wheel (7) is installed at the bottom of the outriggers (6). A closed cargo box (8) is installed on the semi-trailer frame (2), and a generator box (9) is installed on the top of the cargo box (8). Several solar panels (10) are installed inside the power box (9). A horizontally arranged roller shutter (11) is installed on the upper part of the power box (9). The solar panels (10) are located below the roller shutter (11). A cleaning drum (12) is installed at the front end of the power box (9). Each solar panel (10) can be moved to the position of the cleaning drum (12) for cleaning. A vehicle power supply (44) is also provided in the carriage (8). The solar panels (10) are connected to the vehicle power supply (44) and the hub motor (5) through the power transmission line. The generator box (9) has a first guide plate (13) arranged side by side inside. A corresponding second guide plate (14) is provided on the upper side of the first guide plate (13). A guide groove (15) is formed between the first guide plate (13) and the second guide plate (14). The solar panel (10) is located between the two guide plates. Rollers (16) are installed on both sides of the solar panel (10) through axles. The side of the roller (16) is provided with a groove plate (17). The groove plate (17) is clamped on the first guide plate (13) and the second guide plate (14). An inclined groove (18) is also opened on the first guide plate (13) to cooperate with the roller (16). On the outside of the first guide plate (13) The side is also provided with a reciprocating slider (21), on which a solenoid valve (22) is installed. A folding rod (23) is connected to the output shaft of the solenoid valve (22). A horizontally arranged channel steel frame (24) is installed on the rotating shaft of the roller (16). When the solenoid valve (22) is energized, the folding rod (23) can move upward into the channel steel frame (24) and lift the channel steel frame (24) upward so that the roller (16) moves from the inclined groove (18) to the guide groove (15). When the slider (21) moves towards the cleaning drum (12), it can pull the solar panel (10) across the inclined groove (18) with the roller (16) and move it to the position of the cleaning drum (12). A third motor (41) is installed at the front end of the generator box (9). A roller shaft (42) is installed on the output shaft of the third motor (41). One end of the roller blind (11) is fixed on the roller shaft (42) in the length direction. A walking wheel (45) is installed on the other end of the roller blind (11) in the length direction. A fourth motor (46) is installed on the shaft of the walking wheel (45). A guide rail groove (43) that cooperates with the walking wheel (45) is opened on the top of the generator box (9). When the third motor (41) is started, it can drive the roller blind (11) to rotate onto the roller shaft (42) and expose the solar panel (10) at the bottom. The third motor (41) and the fourth motor (46) are both connected to the vehicle power supply (44) through the power transmission line. A transmission chain (25) is installed inside the generator box (9) outside the first guide plate (13). Sprockets (26) are installed at both ends of the transmission chain (25). A slider (21) is fixedly installed on the transmission chain (25). A first motor (27) is installed inside the generator box (9). The output shaft of the first motor (27) is connected to the shaft of one of the sprockets (26). The vehicle power supply (44) is connected to the first motor (27) through a power transmission line. When a large amount of dirt accumulates on the surface of one of the solar panels (10), affecting its power generation performance, it can be moved separately to the front cleaning drum (12). After cleaning, it is moved back to its initial position. The process of achieving the above actions is as follows: First, the first motor (27) starts and drives the transmission chain (25) to rotate, allowing the slider (21) to move to the bottom of the channel steel frame of the solar panel (10) to be cleaned. Then, the transmission chain (25) stops rotating, the solenoid valve (22) on the slider (21) is energized, and the bending rod (23) extends upward and enters. The roller (16) moves from the inclined groove (18) to the guide groove (15) inside the channel steel frame (24), and then the transmission chain (25) continues to rotate. The folding rod (23) moves to contact the vertical plate in front of the channel steel frame (24) and pulls it forward together. The transmission chain (25) drives the slider (21) to continue to move forward. The folding rod (23) on the slider (21) can also synchronously drive the solar panel (10) to move forward in the guide groove (15). After moving up, the folding rod (23) will not be interfered with by the channel steel frame (24) on the solar panel (10) in front. The front end of the generator box (9) is equipped with a cleaning water tank (38), an electric water pump (39) is installed inside the cleaning water tank (38), a spray pipe (40) is installed on the outlet of the electric water pump (39), and the drain outlet of the spray pipe (40) is located at the rear side of the cleaning drum (12). The electric water pump (39) is connected to the vehicle power supply (44) through the power transmission line.

2. A semi-trailer logistics van using solar energy to provide auxiliary power according to claim 1, characterized in that: A first elastic contact piece (19) is installed in the generator box (9) between the first guide plates (13). A second elastic contact piece (20) is provided at the bottom of the solar panel (10). When the roller (16) is located in the inclined groove (18), the second elastic contact piece (20) contacts the first elastic contact piece (19) to form a passage.

3. A semi-trailer logistics van using solar energy to provide auxiliary power according to claim 1, characterized in that: The slider (21) is equipped with a T-shaped guide block (28), and the box wall of the generator box (9) is provided with a T-shaped guide groove (29) that cooperates with the T-shaped guide block (28). A first conductive plate (30) is provided in the T-shaped guide groove (29), and a second conductive plate (31) that contacts the first conductive plate (30) is installed on the slider (21). The second conductive plate (31) is connected to the solenoid valve (22) through a line. After the first conductive plate (30) is energized, the lever (23) on the solenoid valve (22) can rise vertically.

4. A semi-trailer logistics van using solar energy to provide auxiliary power according to claim 1, characterized in that: The compartment (8) is equipped with a pull-out storage rack (32). The storage rack (32) has racks (33) on both sides along its length. The compartment (8) is equipped with a second motor (34) on both sides. The output shaft of the second motor (34) is equipped with a gear (35) that meshes with the racks (33). The vehicle power supply (44) is connected to the second motor (34) through a power transmission line. When the second motor (34) is started, it can drive the storage rack (32) to move in and out of the compartment (8). A first stop (36) is fixedly installed at the front end of the storage rack (32). A second stop (37) that can rotate is installed at the rear end of the storage rack (32). After the storage rack (32) is pulled out of the compartment (8), the second stop (37) can rotate to contact the ground to form support.

5. A semi-trailer logistics van using solar energy to provide auxiliary power according to claim 4, characterized in that: The second stop (37) is installed at the end of the storage rack (32) via a hinge shaft (47). A support wheel (48) is installed on the upper end of the second stop (37). A limiting post (49) is provided on the side of the second stop (37). A rotatable hook rod (50) is hinged on the storage rack (32). When the hook rod (50) is hung on the limiting post (49), the second stop (37) is in a vertical state on the upper or lower side of the storage rack (32).

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