Intelligent wireless irrigation control device

By using movable wheels, reinforcement components, and an intelligent control system, the displacement problem of wireless irrigation equipment under external force was solved, realizing the stability and intelligent management of the irrigation device, and improving irrigation efficiency and energy utilization efficiency.

CN224124853UActive Publication Date: 2026-04-17SHANDONG SHANGSHAN WATER TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANDONG SHANGSHAN WATER TECH CO LTD
Filing Date
2025-05-23
Publication Date
2026-04-17

AI Technical Summary

Technical Problem

Existing wireless irrigation equipment is prone to displacement or shaking during irrigation due to external forces, affecting the stability and reliability of the equipment operation, and lacks effective means of fixing it.

Method used

Using movable wheels and reinforcements at the lower end of the frame, the drill rod is driven by a motor to drill into the ground and fix the device; the controller in the control box and the wireless module enable remote control; the rail and movable seat structure clamp the water storage tank by a motor and hydraulic rod; the photovoltaic panel can be adjusted to receive solar energy.

Benefits of technology

It enables flexible movement and stable fixation of irrigation devices in farmland, ensuring the stability of irrigation operations, providing intelligent management, reducing energy costs, and improving energy conversion efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an intelligent wireless irrigation control device, and relates to the technical field of wireless irrigation. Four moving wheels are installed at the lower end of the frame body through bolts, reinforcing parts are installed at the left end and the right end of the frame body through bolts, each reinforcing part comprises a motor base, a bearing base, a connecting rod, a lifting plate and a transmission base, the motor bases and the bearing bases are installed on the frame body through bolts, and the bearing bases are located above the motor bases; a first motor is installed on the motor base through a bolt. Flexible movement is achieved through the moving wheels at the lower end of the frame body, remote intelligent control is achieved by utilizing a reinforcing piece drill rod stabilizing and fixing device and matching with a controller and a wireless control module in a control box, a water storage barrel is fixed and protected through a rail rod, a movable base and a clamping arm structure, solar energy is converted into electric energy through a photovoltaic panel and an angle adjusting component, and energy is saved. The energy consumption is reduced, and the performance and the practicability of the intelligent wireless irrigation control device are comprehensively improved.
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Description

Technical Field

[0001] This utility model relates to the field of wireless irrigation technology, and in particular to an intelligent wireless irrigation control device. Background Technology

[0002] In agricultural production, irrigation is a crucial link in ensuring crop growth and increasing yield. Traditional irrigation methods, such as manual flooding and ditch irrigation, suffer from serious water waste, low irrigation efficiency, and high labor intensity, making it difficult to meet the needs of modern agriculture for refined and efficient production. With the continuous advancement of technology, intelligent irrigation systems have emerged, achieving on-demand irrigation through automated control, thus solving some of the drawbacks of traditional irrigation methods to a certain extent. This utility model is an intelligent wireless irrigation control device.

[0003] Existing wireless irrigation equipment lacks effective means of fixing itself after reaching the irrigation location, which makes it prone to displacement or shaking due to external forces such as wind and water flow during irrigation. During equipment operation, it is impossible to effectively prevent the water storage tank from shaking, affecting the overall stability and reliability of the equipment. Utility Model Content

[0004] This disclosure relates to an intelligent wireless irrigation control device to solve the technical problems mentioned in the background section.

[0005] In a first aspect, this disclosure provides an intelligent wireless irrigation control device, specifically comprising: a frame;

[0006] The lower end of the frame is bolted with four casters. Reinforcing components are bolted to both the left and right ends of the frame. These components include a motor mount, bearing mount, connecting rod, lifting plate, and transmission mount. The motor mount and bearing mount are bolted to the frame, with the bearing mount located above the motor mount. A first-generation motor is bolted to the motor mount, and a first-generation lead screw is mounted on the bearing mount. The lower end of the first-generation lead screw is connected to the output shaft of the first-generation motor via a coupling. The connecting rod is installed between the bearing mount and the motor mount. A mating seat is threaded onto the first-generation lead screw. The lifting plate is bolted to the mating seat, which has two contact wheels that contact the front and rear ends of the connecting rod. The transmission mount is fixed to the lower end of the lifting plate. A top cover is mounted on the lower end of the transmission mount, and a second-generation motor is bolted to it. A gear is mounted on the output shaft of the transmission mount. A bottom cylinder is bolted to the lower end of the top cover. Two drill rods are installed inside the bottom cylinder, each with a gear. These gears mesh with the gears on the output shaft of the transmission mount.

[0007] In at least some embodiments,

[0008] The upper end of the frame is bolted with a partition, and the lower end of the partition is bolted with a control box. The control box contains a power module and a controller. The controller is equipped with a wireless control module, and a water pump is installed inside the control box. The outlet of the water pump is connected to an outlet pipe. The upper end of the partition is equipped with a water storage tank, which is equipped with a level gauge. An inlet pipe connects the water storage tank to the inlet of the water pump.

[0009] In at least some embodiments,

[0010] A rail is fixed to the partition. The rail is a hollow structure. A gearbox is bolted to the upper end of the rail. A threaded rod is installed inside the rail and is connected to the output shaft of the gearbox. A No. 3 motor is bolted to the gearbox. A movable seat is mounted on the rail, and a stabilizing wheel is mounted on the movable seat. The stabilizing wheel is in contact with the rail.

[0011] In at least some embodiments,

[0012] The movable seat is equipped with a connecting seat, which is threadedly engaged with the threaded rod inside the rail. An mounting plate is installed on the movable seat by bolts, and a rail plate is installed on the mounting plate. Plate No. 1 and Plate No. 2 slide on the rail plate.

[0013] In at least some embodiments,

[0014] Both plate number one and plate number two are bolted with clamping arms and toothed plates. The two clamping arms are clamped onto the water storage tank. Plate number one is mounted with a support plate. Plate number one hydraulic rod is mounted on the rail plate. The piston rod of hydraulic rod number one is fixedly connected to the support plate. The rail plate is mounted with intermediate wheels through bearings. The intermediate wheels mesh with gears on plate number one and plate number two respectively.

[0015] In at least some embodiments,

[0016] A mounting base is bolted to the partition plate, a rotating rod is installed inside the mounting base, a support plate is bolted to the upper end of the rotating rod, a connecting plate is fixed on the rotating rod, a bracket is bolted to the partition plate, and a second hydraulic rod is installed between the bracket and the connecting plate.

[0017] In at least some embodiments,

[0018] A fixed frame is installed on the pallet, and a No. 4 motor and a No. 2 lead screw are installed on the fixed frame. Both the output shaft of the No. 4 motor and the No. 2 lead screw are equipped with pulleys, and a belt connects the two pulleys. A lifting seat is installed on the No. 2 lead screw. A movable frame is installed on the fixed frame via hinges, and a photovoltaic panel is installed on the movable frame. An intermediate frame connects the movable frame and the lifting seat. The photovoltaic panel is electrically connected to the power module in the control box.

[0019] This utility model provides an intelligent wireless irrigation control device, which has the following beneficial effects:

[0020] In this utility model, the movable wheels installed at the lower end of the frame facilitate the flexible movement of the device in areas such as farmland, and can quickly reach different irrigation areas; the reinforcements at the left and right ends of the frame are driven by a No. 1 motor to drive a No. 1 lead screw, which causes the lifting plate to drive the transmission seat to rise and fall. The drill rod of the transmission seat can drill into the ground, thereby fixing the device firmly and preventing it from moving or shaking due to external forces during irrigation, and ensuring the stable operation of irrigation.

[0021] Furthermore, in this utility model, the controller inside the control box is equipped with a wireless control module, allowing users to remotely control the irrigation device and achieve intelligent management. The structure composed of the rail rod, movable seat, and related components drives the threaded rod through the No. 3 motor and gearbox, which in turn moves the No. 1 and No. 2 plates on the movable seat. The clamping arms clamp the water storage tank, providing a fixed protection for the tank. The cooperation between the No. 1 hydraulic rod and the intermediate wheel makes the clamping operation of the clamping arms more stable and efficient.

[0022] Furthermore, in this invention, the photovoltaic panels on the tray can convert solar energy into electrical energy and are electrically connected to the power module in the control box, providing clean energy for the operation of the device, reducing dependence on traditional electricity and saving energy costs; at the same time, by adjusting the angle of the photovoltaic panels through components such as the No. 4 motor and the No. 2 lead screw, they can fully receive sunlight, further improving energy conversion efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0024] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0025] In the attached diagram:

[0026] Figure 1 A schematic diagram of the overall structure of this application is shown;

[0027] Figure 2 A schematic diagram of the structure of the reinforcement part of this application is shown;

[0028] Figure 3 A schematic diagram of the bottom cylinder portion of this application is shown;

[0029] Figure 4 A schematic diagram of the rail section of this application is shown;

[0030] Figure 5 A schematic diagram of the structure of the movable seat portion of this application is shown;

[0031] Figure 6 A structural schematic diagram of the second plate portion of this application is shown;

[0032] Figure 7 A structural schematic diagram of the mounting base portion of this application is shown;

[0033] Figure 8 A structural schematic diagram of the fixing frame portion of this application is shown.

[0034] List of reference numerals

[0035] 1. Frame; 11. Casters; 12. Partition; 13. Control box; 14. Water tank; 141. Level gauge; 142. Water inlet pipe;

[0036] 2. Reinforcing components; 21. Motor base; 211. Motor No. 1; 212. Lead screw No. 1; 213. Mating seat; 214. Contact wheel; 22. Bearing seat; 23. Connecting rod; 24. Lifting plate; 25. Transmission seat; 251. Top cover; 252. Motor No. 2; 253. Bottom cylinder; 2531. Drill rod;

[0037] 3. Rail rod; 31. Gearbox; 311. No. 3 motor; 32. Movable seat; 321. Stabilizing wheel; 322. Connecting seat; 33. Mounting plate; 34. Rail plate; 341. No. 1 hydraulic rod; 35. No. 1 plate; 351. No. 2 plate; 3511. Support plate; 3512. Toothed plate; 3513. Clamping arm; 352. Intermediate wheel;

[0038] 4. Mounting base; 41. Rotating rod; 411. Connecting plate; 42. Support plate; 43. Bracket; 431. No. 2 hydraulic rod; 44. Fixing frame; 441. No. 4 motor; 442. No. 2 lead screw; 443. Lifting seat; 444. Intermediate frame; 45. Movable frame; 451. Photovoltaic panel. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model 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 this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] Please refer to Figures 1 to 8 Example 1:

[0041] This utility model proposes an intelligent wireless irrigation control device, including: a frame 1;

[0042] Four casters 11 are bolted to the lower end of the frame 1. Reinforcing members 2 are bolted to both the left and right ends of the frame 1. Each reinforcing member 2 includes a motor base 21, a bearing housing 22, a connecting rod 23, a lifting plate 24, and a transmission seat 25. The motor base 21 and bearing housing 22 are bolted to the frame 1. The bearing housing 22 is located above the motor base 21. A first motor 211 is bolted to the motor base 21, and a first lead screw 212 is mounted on the bearing housing 22. The lower end of the first lead screw 212 is connected to the output shaft of the first motor 211 via a coupling. The connecting rod 23 is installed between the bearing housing 22 and the motor base 21. A mating seat 2 is threaded onto the first lead screw 212. 13. The lifting plate 24 is bolted to the mating seat 213. Two contact wheels 214 are mounted on the mating seat 213. The two contact wheels 214 contact the front and rear end faces of the connecting rod 23 respectively. The transmission seat 25 is fixed to the lower end of the lifting plate 24. A top cover 251 is mounted on the lower end of the transmission seat 25. A second motor 252 is bolted to the transmission seat 25. A gear is mounted on the output shaft of the transmission seat 25. A bottom cylinder 253 is bolted to the lower end of the top cover 251. Two drill rods 2531 are installed inside the bottom cylinder 253. Gears are mounted on both drill rods 2531, and the gears on both drill rods 2531 mesh with the gears on the output shaft of the transmission seat 25.

[0043] A partition 12 is bolted to the upper end of the frame 1, and a control box 13 is bolted to the lower end of the partition 12. The control box 13 contains a power module and a controller. The controller has a wireless control module and a water pump is installed inside the control box 13. The outlet of the water pump is connected to an outlet pipe. A water storage tank 14 is installed at the upper end of the partition 12. A level gauge 141 is installed on the water storage tank 14, and an inlet pipe 142 is connected between the water storage tank 14 and the inlet of the water pump.

[0044] In this embodiment of the disclosure,

[0045] A rail rod 3 is fixed on the partition plate 12. The rail rod 3 is a hollow structure. A gearbox 31 is bolted to the upper end of the rail rod 3. A threaded rod is installed inside the rail rod 3. The threaded rod is connected to the output shaft of the gearbox 31. A No. 3 motor 311 is bolted to the gearbox 31. A movable seat 32 is movable on the rail rod 3. A stabilizing wheel 321 is installed on the movable seat 32. The stabilizing wheel 321 contacts the rail rod 3. A connecting seat 322 is installed inside the movable seat 32. The connecting seat 322 is threadedly engaged with the threaded rod inside the rail rod 3. Its function is as follows: After the No. 3 motor 311 starts, the power is transmitted to the gearbox 31. After the gearbox 31 adjusts the speed and torque, it drives the threaded rod inside the rail rod 3 to rotate. Since the connecting seat 322 is threadedly engaged with the threaded rod, the rotation of the threaded rod will cause the connecting seat 322 to move linearly along the threaded rod, thereby driving the movable seat 32 to move up and down on the rail rod 3. The stabilizing wheel 321 can play a supporting and guiding role during the movement of the movable seat 32.

[0046] Example 2, based on Example 1,

[0047] A mounting plate 33 is bolted to the movable seat 32. A rail plate 34 is mounted on the mounting plate 33. A first plate 35 and a second plate 351 slide on the rail plate 34. Clamping arms 3513 and toothed plates 3512 are bolted to both the first plate 35 and the second plate 351. The two clamping arms 3513 are clamped to the water storage tank 14. A support plate 3511 is mounted on the first plate 35. A first hydraulic rod 341 is mounted on the rail plate 34. The piston rod of the first hydraulic rod 341 is fixedly connected to the support plate 3511. An intermediate wheel is mounted on the rail plate 34 via bearings. 352, the intermediate wheel 352 meshes with the gears on plate 1 35 and plate 2 351 respectively. Its function is to drive plate 1 35 to move through hydraulic rod 341, and the intermediate wheel 352 meshes with the gear plate 3512 on plate 1 35 and plate 2 351, so that plate 1 35 and plate 2 351 can move synchronously and in opposite directions. In this way, the two clamping arms 3513 can clamp the water storage tank 14 from both sides, ensuring that the water storage tank 14 will not shake or shift during the operation of the device, thus providing a guarantee for the stable operation of irrigation.

[0048] Example 3, based on Examples 1 and 2,

[0049] A mounting base 4 is bolted to the partition 12. A rotating rod 41 is installed inside the mounting base 4. A support plate 42 is bolted to the upper end of the rotating rod 41. A connecting plate 411 is fixed to the rotating rod 41. A bracket 43 is bolted to the partition 12. A second hydraulic rod 431 is installed between the bracket 43 and the connecting plate 411. A fixed frame 44 is mounted on the support plate 42. A fourth motor 441 and a second lead screw 442 are mounted on the fixed frame 44. Pulleys are mounted on the output shaft of the fourth motor 441 and the second lead screw 442. A belt connects the two pulleys. A lifting seat 443 is mounted on the second lead screw 442. A movable frame 45 is hinged to the fixed frame 44. A photovoltaic panel 451 is mounted on the movable frame 45. An intermediate frame 444 connects the movable frame 45 and the lifting seat 443. The photovoltaic panel 451 is connected to the control box 13. The power module is electrically connected, and its function is as follows: the extension and retraction of the second hydraulic rod 431 can drive the connecting plate 411 to rotate around the rotating rod 41, thereby causing the rotating rod 41 and the support plate 42 installed on its upper end to rotate together. The photovoltaic panel 451 can adjust its orientation according to the changes in the horizontal position of the sun at different times, so as to receive sunlight to the maximum extent and improve the conversion efficiency of solar energy. After the fourth motor 441 starts, it drives the second lead screw 442 to rotate through the pulley and belt. The lifting seat 443 on the second lead screw 442 will move up and down with the rotation of the lead screw. The lifting seat 443 is connected to the movable frame 45 through the intermediate frame 444, so that the movable frame 45 rotates around the hinge, realizing the adjustment of the tilt angle of the photovoltaic panel 451. This helps the photovoltaic panel 451 adapt to the changes in the altitude angle of the sun in different seasons and at different times, further improving the solar energy collection effect.

[0050] The working principle of this embodiment is as follows: The four casters 11 installed at the lower end of the frame 1 allow the device to move flexibly within the irrigation area, facilitating position adjustment to adapt to different irrigation needs. When the device reaches the designated position, the first motor 211 in the reinforcement 2 is activated. The first motor 211 drives the first lead screw 212 to rotate. Since the first lead screw 212 is threadedly engaged with the mating seat 213, the mating seat 213 will move up and down along the first lead screw 212, thereby driving the lifting plate 24 and the transmission seat 25 to descend. The second motor 252 on the transmission seat 25 starts, driving the bottom cylinder 253 through gear transmission. The two drill rods 2531 inside rotate, drilling into the ground and firmly fixing the device in its current position to prevent movement during irrigation. The user sends an irrigation command to the controller via the wireless control module. Upon receiving the command, the controller starts the water pump in the control box 13. The water pump draws water from the storage tank 14 through the inlet pipe 142 and delivers the water to the irrigation area through the outlet pipe, realizing the irrigation operation. The piston rod of the first hydraulic rod 341 on the track plate 34 extends and retracts, driving the first plate 35 to move. The toothed plate 3512 on the first plate 35 meshes with the intermediate wheel 352. 2. Then, the toothed plate 3512 on the second plate 351 is driven, causing the second plate 351 to move synchronously in the opposite direction to the first plate 35. The clamping arms 3513 on the first plate 35 and the second plate 351 move closer or further away, thereby achieving the clamping or releasing operation of the water storage tank 14, ensuring that the water storage tank 14 remains stable during the operation of the device. The photovoltaic panel 451 on the support plate 42 converts solar energy into electrical energy and transmits the electrical energy to the power module in the control box 13, providing power support for various components of the device and reducing dependence on traditional power sources. The second hydraulic rod 431 on the partition plate 12 extends and retracts, driving the rotating rod 41. The connecting plate 411 on the top rotates, causing the rotating rod 41 and the support plate 42 to rotate together, thereby adjusting the horizontal angle of the photovoltaic panel 451. This allows the photovoltaic panel 451 to track changes in the horizontal position of the sun. The fourth motor 441 on the fixed frame 44 starts, driving the second lead screw 442 to rotate via the pulley and belt. The lifting seat 443 on the second lead screw 442 moves up and down. The lifting seat 443 drives the movable frame 45 to rotate around the hinge via the intermediate frame 444, thereby adjusting the tilt angle of the photovoltaic panel 451. This allows the photovoltaic panel 451 to adapt to changes in the solar altitude angle and improve the solar energy conversion efficiency.

[0051] The following points should be noted in this article:

[0052] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0053] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0054] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A smart wireless irrigation control device comprising: Frame (1); characterized in that, The lower end of the frame (1) is equipped with four casters (11). Reinforcing components (2) are installed on both the left and right ends of the frame (1). Each reinforcing component (2) includes a motor mount (21), a bearing mount (22), a connecting rod (23), a lifting plate (24), and a transmission mount (25). The motor mount (21) and bearing mount (22) are both mounted on the frame (1). The bearing mount (22) is located above the motor mount (21). A first motor (211) is mounted on the motor mount (21), and a first lead screw (212) is mounted on the bearing mount (22). The lower end of the first lead screw (212) is connected to the output shaft of the first motor (211). The connecting rod (23) is installed between the bearing mount (22) and the motor mount (21). A mating seat is threaded onto the first lead screw (212). 213), the lifting plate (24) is installed on the mating seat (213), and two contact wheels (214) are installed on the mating seat (213). The two contact wheels (214) respectively contact the front and rear end faces of the connecting rod (23). The transmission seat (25) is fixed at the lower end of the lifting plate (24). The lower end of the transmission seat (25) is equipped with a top cover (251), and a second motor (252) is installed on the transmission seat (25). A gear is installed on the output shaft of the transmission seat (25). The lower end of the top cover (251) is equipped with a bottom cylinder (253). Two drill rods (2531) are installed inside the bottom cylinder (253). Gears are installed on both drill rods (2531), and the gears on both drill rods (2531) mesh with the gears on the output shaft of the transmission seat (25).

2. The intelligent wireless irrigation control device according to claim 1, characterized in that, The upper end of the frame (1) is equipped with a partition (12), and the lower end of the partition (12) is equipped with a control box (13). The control box (13) is equipped with a power module and a controller. The controller is equipped with a wireless control module. The control box (13) is equipped with a water pump. The outlet of the water pump is connected to a water outlet pipe. The upper end of the partition (12) is equipped with a water storage tank (14). The water storage tank (14) is equipped with a level gauge (141). The water storage tank (14) is connected to the water inlet of the water pump by a water inlet pipe (142).

3. The intelligent wireless irrigation control device according to claim 2, characterized in that, The partition (12) is fixed with a rail rod (3), which is a hollow structure. A gearbox (31) is installed at the upper end of the rail rod (3). A threaded rod is installed inside the rail rod (3). The threaded rod is connected to the output shaft of the gearbox (31). A No. 3 motor (311) is installed on the gearbox (31). A movable seat (32) is movable on the rail rod (3). A stabilizing wheel (321) is installed on the movable seat (32). The stabilizing wheel (321) is in contact with the rail rod (3).

4. The intelligent wireless irrigation control device according to claim 3, characterized in that, The movable seat (32) is equipped with a connecting seat (322), which is threadedly engaged with the threaded rod in the rail (3). The movable seat (32) is equipped with an mounting plate (33), and the mounting plate (33) is equipped with a rail plate (34). A first plate (35) and a second plate (351) slide on the rail plate (34).

5. The intelligent wireless irrigation control device according to claim 4, characterized in that, Both plate 1 (35) and plate 2 (351) are equipped with clamping arms (3513) and toothed plates (3512). The two clamping arms (3513) are clamped on the water storage tank (14). Plate 1 (35) is equipped with a support plate (3511). Plate 2 (34) is equipped with a hydraulic rod (341). The piston rod of the hydraulic rod (341) is fixedly connected to the support plate (3511). Plate 2 (34) is equipped with an intermediate wheel (352) through a bearing. The intermediate wheel (352) meshes with the gears on plate 1 (35) and plate 2 (351) respectively.

6. The intelligent wireless irrigation control device according to claim 3, characterized in that, A mounting base (4) is installed on the partition (12). A rotating rod (41) is installed inside the mounting base (4). A support plate (42) is installed at the upper end of the rotating rod (41). A connecting plate (411) is fixed on the rotating rod (41). A bracket (43) is installed on the partition (12). A second hydraulic rod (431) is installed between the bracket (43) and the connecting plate (411).

7. The intelligent wireless irrigation control device according to claim 6, characterized in that, A fixed frame (44) is installed on the pallet (42). A fourth motor (441) and a second lead screw (442) are installed on the fixed frame (44). Both the output shaft of the fourth motor (441) and the second lead screw (442) are equipped with pulleys. A belt is connected between the two pulleys. A lifting seat (443) is installed on the second lead screw (442). A movable frame (45) is installed on the fixed frame (44) via a hinge. A photovoltaic panel (451) is installed on the movable frame (45). An intermediate frame (444) is connected between the movable frame (45) and the lifting seat (443).