Multi-stage cleaning self-propelled photovoltaic cleaning trolley

Abstract

A multi-stage cleaning self-propelled photovoltaic cleaning trolley, a driving mechanism is installed between the trolley box body and the side beam, a multi-stage cleaning mechanism is installed between the two box bodies, the cleaning mechanism comprises a push shovel fixedly installed between the front ends of the two box bodies, a rolling brush, a cleaning agent atomizing pipe, a cleaning water atomizing pipe and a drying pipe are sequentially installed between the two box bodies behind the push shovel, a cleaning roller is installed between the cleaning agent atomizing pipe and the cleaning water atomizing pipe, a cleaning roller is installed between the cleaning water atomizing pipe and the drying pipe, an arc-shaped suction pipe is installed above the rolling brush, a dust suction hole communicating with the inner chamber of the suction pipe is arranged on the inner side of the suction pipe, and the suction pipe is located above the side of the rolling brush and covers the rolling brush; the photovoltaic panel surface can be completely cleaned, the cleaning effect of the cleaning trolley is greatly improved, and the power generation efficiency of the photovoltaic panel assembly is ensured.

Description

Technical Field

[0001] This invention relates to the field of clean energy, and more particularly to a multi-stage self-propelled photovoltaic cleaning vehicle. Background Technology

[0002] The photovoltaic (PV) industry is developing rapidly, with an increasing number of large-scale PV projects concentrated in deserts, Gobi, and arid regions. These environments are characterized by harsh natural conditions, drought, water scarcity, and frequent sandstorms. Commercial and industrial PV power stations, scattered across various rooftops, face complex environments, severe industrial dust, and are small and dispersed. To ensure timely cleaning and maintain power generation, the daily operation and maintenance of these power stations are becoming increasingly important. Therefore, the cleaning of PV panels is receiving growing attention. PV panels are the core components of a solar PV power generation system, and the cleanliness of their surfaces directly affects power generation efficiency. If dust, dirt, or other impurities are present on the surface of the PV panels, sunlight cannot fully reach the panel surface, thus reducing power generation efficiency. Cleaning PV panels is an indispensable maintenance task in solar PV power generation systems; however, the cleanliness of PV panels remains a key factor limiting their efficiency.

[0003] Currently, cleaning of photovoltaic (PV) panels mainly relies on manual cleaning, high-pressure water jet cleaning, or automated cleaning carts. Manual cleaning presents challenges due to personnel management difficulties; variations in cleaning personnel and their actions make it hard to control, resulting in inconsistent cleaning effectiveness and extremely low efficiency. Furthermore, these variations increase the possibility of glass abrasion, reducing light transmittance and lifespan, ultimately decreasing power generation. They also increase the risk of dangerous actions such as trampling and squeezing, directly damaging the PV panels. High-pressure water jet cleaning requires large amounts of water, making it difficult to implement in water-scarce areas. PV installation locations are often demanding, mostly in mountainous regions where large water tankers cannot access them. Controlling the water pressure is also challenging; excessive pressure can damage the PV panels. Automated cleaning carts utilize high-speed rotating brushes, but their stability is poor, and the brushes cannot thoroughly remove ice, snow, clumps of sand, or solidified bird droppings, resulting in ineffective cleaning and impacting power generation efficiency. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a multi-stage self-propelled photovoltaic cleaning vehicle.

[0005] The technical solution of the present invention is: a multi-stage self-propelled photovoltaic cleaning trolley, which is installed between the two side beams of a horizontally arranged photovoltaic panel and includes two symmetrically arranged boxes. The upper ends of the two boxes are fixedly connected by a cross brace. A drive mechanism is installed between the boxes and the side beams. A multi-stage cleaning mechanism is installed between the two boxes. The cleaning mechanism includes a pusher fixedly installed between the front ends of the two boxes. A roller brush, a cleaning agent atomizing tube, a cleaning water atomizing tube, and a drying tube are sequentially installed between the two boxes behind the pusher. A cleaning roller is installed between the cleaning agent atomizing tube and the cleaning water atomizing tube, and between the cleaning water atomizing tube and the drying tube. A pulley is installed at one end of each of the two cleaning rollers, and the two pulleys are connected by a belt. An adsorption tube with an arc-shaped cross-section is installed above the roller brush. A dust suction hole communicating with the internal cavity of the adsorption tube is provided on the inner side of the adsorption tube. The adsorption tube is located above and to the side of the roller brush and covers the roller brush.

[0006] Preferably, the cleaning cart has a cleaning agent atomizer, a water atomizer, and a hot air blower connected to a drying pipe inside the box on one side. The cleaning agent atomizer is connected to a cleaning agent atomizing pipe that is closed at both ends through a cleaning agent outlet pipe, and the water atomizer is connected to a cleaning water atomizing pipe that is closed at both ends through a water outlet pipe. The bottom plate of the box has a cleaning agent tank connected to the cleaning agent atomizer through a water connection pipe, and a cleaning water tank connected to the water atomizer through a cleaning agent connection pipe.

[0007] Preferably, an exhaust fan is installed inside the box on one side of the cleaning cart. The suction port of the exhaust fan is sealed and connected to the port of the adsorption tube. A dust collection bin is installed on the bottom plate of the box. The exhaust port of the exhaust fan is connected to an exhaust pipe, and the lower end of the exhaust pipe is connected to the dust collection bin.

[0008] Preferably, the suction port of the exhaust fan is connected to the adsorption tube via an adapter. The adapter includes an arc-shaped tube body and a square box body that match the size of the adsorption tube. The arc-shaped tube body and the square box body are connected as one unit. The outer port of the arc-shaped tube body is connected to the adsorption tube, and the square box body is connected to the suction port of the exhaust fan.

[0009] Preferably, the drive mechanism includes support gears at both ends of the lower part of the inner side plate of the housing, a drive gear on one side of the support gear, and a gear motor connected to the drive gear in the housing on one side; the upper end face of the side beam is provided with a support plate, and a rack is fixedly installed on the support plate along its length direction, and the support gear and the drive gear press on the rack and mesh with it.

[0010] Preferably, a notch is provided in the middle of the lower end of the inner side plate of the box. A mechanical braking assembly corresponding to the side beam is installed at the notch. The mechanical braking assembly includes a U-shaped bracket, an electric push rod, and a brake pad. The U-shaped bracket is fixedly connected to the notch. The electric push rod is fixed in the middle of the U-shaped bracket. The brake pad is installed at the outer end of the telescopic rod of the electric push rod. The brake pad is pushed out of the notch and pressed against the surface of the side beam by the electric push rod.

[0011] Preferably, the electric push rod has a guide rail on the support side, and an L-shaped guide rod is installed on the guide rail via a slider. The inner end of the L-shaped guide rod is fixedly connected to the outer end of the telescopic rod of the electric push rod. A U-shaped bracket is fixedly connected to the outer end of the telescopic rod, and a brake pad is fitted into the U-shaped bracket. A bolt is provided between the U-shaped bracket and the brake pad to lock the two together.

[0012] Preferably, a lifting plate is provided in the middle of the inner side panel of the box body, and a rack and pinion motor is provided at the upper end of the inner side panel. The lower end of the lifting rack in the rack and pinion motor is fixedly connected to the lifting plate, and a slide rail slider guide assembly is provided at both ends of the lifting plate and between the inner side panel.

[0013] Preferably, a wind speed sensor is provided in the middle of the upper surface of the cleaning cart.

[0014] The beneficial technical effects of this invention are: (1) The pusher in the multi-stage cleaning mechanism of the present invention performs primary cleaning of dust, icy snow and bird droppings on the surface of the photovoltaic panel. Then, it performs secondary cleaning through a high-speed rotating roller brush, atomized cleaning through a cleaning agent and cleaning water atomization tube, and rolling cleaning through a cleaning roller. Finally, it dries the surface of the photovoltaic panel through a drying tube. The multi-stage cleaning combined with drying can thoroughly clean the surface of the photovoltaic panel, greatly improving the cleaning effect of the cleaning cart and ensuring the power generation efficiency of the photovoltaic panel module.

[0015] (2) Both sides of the cleaning trolley drive mechanism are equipped with mechanical braking components. The components drive the brake pads through the notch in the side plate of the box and contact the side beam through the electric push rod to achieve mechanical braking. The guide rail and L-shaped guide rod on the electric push rod can improve the guidance and braking support of the brake pads, ensuring the mechanical braking effect and overall stability of the braking components. This mechanical braking auxiliary gear motor electronic braking method can significantly shorten the braking distance, achieve rapid braking, and ensure the safety of the trolley in sudden severe weather.

[0016] (3) The present invention uses an adsorption tube with an arc-shaped protective cover structure to absorb the dust raised during the high-speed rotation of the roller brush and discharges the absorbed dust into a collection bucket on one side, so as to avoid the dust raised falling back onto the photovoltaic panel surface and causing secondary pollution, which is conducive to improving the cleaning quality of the trolley.

[0017] (4) The present invention uses a lifting mechanism composed of a rack and pinion motor and a guide assembly to drive a multi-stage cleaning mechanism to adjust the height. Therefore, the cleaning pressure of the cleaning mechanism can be flexibly adjusted according to the dirt on the surface of the photovoltaic panel to ensure that the trolley is in the best cleaning state and to ensure the cleaning effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the photovoltaic cleaning vehicle installed on the photovoltaic panel module; Figure 2 This is a side view of the photovoltaic cleaning vehicle installed on a photovoltaic panel assembly. Figure 3 This is a three-dimensional structural diagram of a photovoltaic cleaning vehicle installed on a photovoltaic panel assembly; Figure 4 This is one of the three-dimensional structural diagrams of the photovoltaic cleaning vehicle; Figure 5 yes Figure 4 Sectional view along axis AA; Figure 6 yes Figure 5 A magnified view of a portion of the image; Figure 7 This is the second schematic diagram of the three-dimensional structure of the photovoltaic cleaning vehicle; Figure 8 This is a schematic diagram of the three-dimensional structure of the adsorption tube; Figure 9 This is a 3D structural diagram of the exhaust fan and adapter; Figure 10 This is a 3D structural diagram of the adapter; Figure 11 This is a schematic diagram of the main structure of the mechanical braking assembly of the present invention; Figure 12 This is a three-dimensional structural schematic diagram of the mechanical braking component of the present invention; Figure 13 This is a structural diagram of a geared motor and its drive gear.

[0019] In the diagram, 01. Cleaning trolley, 11. Box body, 111. Inner side panel, 12. Cross brace, 13. Wind speed sensor, 02. Photovoltaic panel, 21. Side beam, 22. Support plate, 23. Arc-shaped baffle, 31. Pusher, 32. Roller brush, 321. Roller brush motor, 33. Detergent atomizing tube, 331. Detergent atomizer, 332. Detergent outlet tube, 333. Detergent tank, 334. Detergent connecting tube, 34. Cleaning water atomizing tube, 341. Clean water atomizer, 342. Clean water outlet tube, 343. Cleaning water tank, 344. Clean water connecting tube, 35. Drying tube, 351. Hot air blower, 36. Cleaning roller, 361. Pulley, 362. Belt, 363. Cleaning roller motor, 37. 371. Rack and pinion motor; 38. Lifting rack; 39. Slide rail slider guide assembly; 40. Lifting plate; 41. Rack; 42. Support gear; 43. Drive gear; 44. Gear motor; 45. Guide wheel; 56. Mechanical braking assembly; 57. U-shaped bracket; 58. Brake pad; 59. Electric push rod; 50. Telescopic rod; 51. Guide rail; 52. Slider; 53. L-shaped guide rod; 54. U-shaped bracket; 55. Bolt; 56. Notch; 67. Adsorption tube; 68. Dust suction hole; 69. Flange plate; 60. Exhaust fan; 61. Exhaust fan suction port; 62. Adapter; 63. Arc-shaped tube body; 64. Square box; 65. Dust collection bin; 66. Exhaust pipe. Detailed Implementation

[0020] Example 1, see appendix to the instruction manual. Figure 1-13A multi-stage self-propelled photovoltaic cleaning trolley is disclosed. The trolley is installed between two side beams of horizontally arranged photovoltaic panels. The photovoltaic panels are horizontally arranged between the two side beams and include two symmetrically arranged boxes. The upper ends of the two boxes are fixedly connected by a cross brace. A drive mechanism is installed between the boxes and the side beams, driving the cleaning trolley to move above the photovoltaic panels. A multi-stage cleaning mechanism is installed between the two boxes. This mechanism includes a pusher fixedly installed between the front ends of the two boxes, which removes ice, snow, and bird droppings from the surface of the photovoltaic panels. Behind the pusher, between the two boxes, a roller brush, a cleaning agent atomizing tube, a cleaning water atomizing tube, and a drying tube are sequentially installed. The side walls of the cleaning water atomizing tube and the cleaning agent atomizing tube are densely covered with numerous atomizing holes or atomizing nozzles. The drying tube... The sidewall is densely covered with several air jet holes or nozzles. A roller brush motor is installed in the box on one side to drive the roller brush to rotate. A cleaning roller is installed between the cleaning agent atomizing tube and the cleaning water atomizing tube. A cleaning roller motor is installed in the box to drive the cleaning roller to rotate. A cleaning roller is installed between the cleaning water atomizing tube and the drying tube. A pulley is installed at one end of each cleaning roller. The two pulleys are connected by a belt. Therefore, the cleaning roller motor can drive the two cleaning rollers to rotate synchronously. A flexible coating layer is covered on the surface of the cleaning roller. An adsorption tube with an arc-shaped cross-section is installed above the roller brush. The adsorption tube can cover the entire upper part of the roller brush to form an arc-shaped protective cover structure. A dust suction hole communicating with the internal cavity of the adsorption tube is provided on the inner side of the adsorption tube. The adsorption tube is located on the side above the roller brush and covers the roller brush.

[0021] The cleaning cart has a cleaning agent atomizer, a water atomizer, and a hot air blower connected to a drying pipe inside its compartment. The cleaning agent atomizer is connected to a cleaning agent atomizing tube that is closed at both ends via a cleaning agent outlet pipe. After the cleaning agent is atomized and sprayed, it is rolled and cleaned on the photovoltaic panel surface by a cleaning roller behind it. The water atomizer is connected to a cleaning water atomizing tube that is closed at both ends via a cleaning water outlet pipe. After the cleaning water is atomized and sprayed to rinse the photovoltaic panel, it is rolled and wiped on the photovoltaic panel surface by a cleaning roller behind it. The bottom plate of the compartment has a cleaning agent tank connected to the cleaning agent atomizer via a water connection pipe, and a cleaning water tank connected to the water atomizer via a cleaning agent connection pipe.

[0022] A suction fan is installed inside the housing on one side of the cleaning cart. The suction port of the suction fan is sealed to the end of the adsorption tube. A dust collection bin is installed on the bottom plate of the housing. The exhaust port of the suction fan is connected to an exhaust pipe, the lower end of which connects to the dust collection bin. The suction force of the suction fan creates a negative pressure inside the adsorption tube, and the dust suction holes on the inner surface of the adsorption tube generate adsorption force, sucking the dust generated by the roller brush into the adsorption tube. The dust absorbed by the adsorption tube enters the exhaust pipe from the suction fan, and then enters the dust collection bin for temporary storage. The dust collection bin is cleaned periodically. A wind speed sensor is installed in the middle of the upper surface of the cleaning cart.

[0023] In this embodiment, both ends of the adsorption tube are provided with a flange plate. The two ends of the adsorption tube are fixedly connected to the bracket through the flange plate. The flange plate of this structure can fix the adsorption tube tightly between the two bracket plates. After placing a gasket between the flange plate and the bracket plate, the sealing of both ends of the adsorption tube can be guaranteed.

[0024] like Figure 9 and Figure 10 As shown, in this embodiment, the suction port of the exhaust fan connects to the adsorption tube via an adapter. Since the adsorption tube has an arc-shaped hollow cross-section, the adapter includes an arc-shaped tube body and a square box body that match the size of the adsorption tube. The arc-shaped tube body and the square box body are connected as a single unit. The outer port of the arc-shaped tube body connects to the adsorption tube, and the square box body connects to the suction port of the exhaust fan. This specially structured adapter facilitates quick assembly and connection between the exhaust fan and the adsorption tube, and ensures a tight seal after connection. The combined structure of the arc-shaped tube body and the square box body minimizes the loss of suction power from the exhaust fan, further improving the suppression of dust generated by the roller brush.

[0025] like Figure 8 As shown, the dust suction holes in this embodiment are elongated holes, which are arranged along the length of the adsorption tube and extend to both ends of the adsorption tube. Several elongated holes are arranged at equal intervals on the inner surface of the adsorption tube to increase the adsorption tube's dust absorption effect.

[0026] like Figure 7 As shown, in this embodiment, a lifting plate is provided in the middle of the inner side panel of the box, and a rack and pinion motor is provided at the upper end of the inner side panel. The lower end of the lifting rack in the rack and pinion motor is fixedly connected to the lifting plate. Slide rail slider guide assemblies are provided at both ends of the lifting plate and between the inner side panel. The rack and pinion motor drives the lifting plate to rise or fall through the rack. The slide rail slider guide assemblies at both ends of the lifting plate ensure the stability of the lifting plate during movement.

[0027] The working process and principle of this embodiment are as follows: When the cleaning trolley is cleaning, the rack and pinion decelerator drives the multi-stage cleaning mechanism between the two lifting plates to move downwards and press against the surface of the photovoltaic panel. The cleaning pressure of the cleaning mechanism is adjusted according to the degree of dirt on the surface of the photovoltaic panel. Then, the drive mechanism drives the trolley to move forward along the two side beams directly above the photovoltaic panel. The pusher at the front performs primary cleaning of dust, icy snow or bird droppings on the surface of the photovoltaic panel. Then, the high-speed rotating roller brush at the rear performs cleaning, and the cleaning agent and cleaning water atomizing tube perform atomized cleaning. At the same time, the rotating cleaning roller performs rolling cleaning, and the surface of the photovoltaic panel is dried through the drying tube. The multi-stage cleaning combined with drying thoroughly cleans the surface of the photovoltaic panel.

[0028] Example 2, see appendix to the instruction manual. Figure 1 -2, 5, 7. The drive mechanism in Embodiment 1 includes support gears at both ends of the lower part of the inner side plate of the housing, a drive gear on one side of the support gear, and a gear motor connected to the drive gear inside the housing on one side. A support plate is provided on the upper end face of the side beam, and a rack is fixedly installed on the support plate along its length. The support gear and the drive gear press against and mesh with the rack. The housing moves along the rack via the gears, and the trolley is driven to travel on the side beam by the gear and rack meshing method. This method can reduce the phenomenon of the cleaning trolley sliding relative to the side beam, reduce transmission loss, and improve transmission efficiency.

[0029] In this embodiment, a notch is provided in the middle of the lower end of the inner side panel of the housing. The mechanical braking assembly contacts the side of the side beam through the notch to achieve mechanical braking. A mechanical braking assembly corresponding to the side beam is installed at the notch. The mechanical braking assembly includes a U-shaped bracket, an electric push rod, and a brake pad. The U-shaped bracket is fixedly connected to the notch, the electric push rod is fixed in the middle of the U-shaped bracket, and the brake pad is installed on the outer end of the telescopic rod of the electric push rod. The brake pad is pushed out of the notch and pressed against the surface of the side beam by the electric push rod to achieve braking.

[0030] In this embodiment, the support side of the electric actuator is provided with a guide rail, on which an L-shaped guide rod is mounted via a slider. The inner end of the L-shaped guide rod is fixedly connected to the outer end of the telescopic rod of the electric actuator. The L-shaped guide rod provides sliding guidance for the telescopic rod and also serves to reinforce and support it, ensuring the overall stability of the braking assembly during braking. A U-shaped bracket is fixedly connected to the outer end of the telescopic rod. The brake pad is fitted into the U-shaped bracket, and a bolt is provided between the U-shaped bracket and the brake pad to lock them together. This structure facilitates the assembly or disassembly of the brake pad.

[0031] In this embodiment, guide wheels are provided on both sides of the lower end of the inner side plate of the housing. The guide wheels press against the bottom surface of the side beam, and the guide wheels guide the movement of the cleaning trolley, improving the stability of the cleaning trolley during the cleaning process. The upper part of the side beam is provided with an arc-shaped baffle, which covers the gears and rack. The arc-shaped baffle protects against dust, preventing dust from entering between the gears and rack, reducing the frequency of maintenance, and improving the transmission efficiency of the gears and rack.

[0032] The working process and principle of this embodiment are as follows: The geared motors inside the two side boxes start synchronously, driving the corresponding active gears to rotate. The active gears on both sides drive the cleaning trolley to move along the racks on the beams on both sides of the photovoltaic panel. The remaining gears on the inner side plate of the box provide stable support, ensuring that the cleaning trolley moves stably and cleans. When the fan sensor detects a sudden strong wind or severe weather, it activates the mechanical braking component to perform mechanical braking, and at the same time controls the geared motor to stop running to brake. The mechanical braking assists the electronic braking of the geared motor, which can greatly shorten the braking distance and ensure the stability of the braking process.

Claims

1. A multi-stage self-propelled photovoltaic cleaning vehicle, the cleaning vehicle being installed between the two side beams of horizontally arranged photovoltaic panels, characterized in that: The device comprises two symmetrically arranged chambers, with their upper ends fixedly connected by a cross brace. A drive mechanism is installed between the chambers and the side beams. A multi-stage cleaning mechanism is installed between the two chambers. This cleaning mechanism includes a pusher fixedly installed between the front ends of the two chambers. Behind the pusher, between the two chambers, a roller brush, a cleaning agent atomizing tube, a cleaning water atomizing tube, and a drying tube are sequentially installed. A cleaning roller is installed between the cleaning agent atomizing tube and the cleaning water atomizing tube, and between the cleaning water atomizing tube and the drying tube. A pulley is installed at one end of each of the two cleaning rollers, and the two pulleys are connected by a belt. An arc-shaped suction tube is installed above the roller brush. A dust suction hole communicating with the internal chamber of the suction tube is provided on the inner side of the suction tube. The suction tube is located above and to the side of the roller brush and covers the roller brush.

2. The multi-stage cleaning self-propelled photovoltaic cleaning vehicle according to claim 1, characterized in that: cleaning... The compartment on one side of the trolley contains a cleaning agent atomizer, a water atomizer, and a hot air blower connected to a drying pipe. The cleaning agent atomizer is connected to a cleaning agent atomizing pipe that is closed at both ends via a cleaning agent outlet pipe, and the water atomizer is connected to a cleaning water atomizing pipe that is closed at both ends via a water outlet pipe. The bottom plate of the compartment contains a cleaning agent tank connected to the cleaning agent atomizer via a water connection pipe, and a cleaning water tank connected to the water atomizer via a cleaning agent connection pipe.

3. The multi-stage cleaning self-propelled photovoltaic cleaning vehicle according to claim 1, characterized in that: cleaning... An exhaust fan is installed inside the box on one side of the vehicle. The suction port of the exhaust fan is sealed and connected to the port of the adsorption tube. A dust collection bin is installed on the bottom plate of the box. The exhaust port of the exhaust fan is connected to an exhaust pipe, and the lower end of the exhaust pipe is connected to the dust collection bin.

4. The multi-stage cleaning self-propelled photovoltaic cleaning vehicle according to claim 3, characterized in that: The suction port of the exhaust fan is connected to the adsorption tube via an adapter. The adapter includes an arc-shaped tube body and a square box body that match the size of the adsorption tube. The arc-shaped tube body and the square box body are connected as one unit. The outer port of the arc-shaped tube body is connected to the adsorption tube, and the square box body is connected to the suction port of the exhaust fan.

5. The multi-stage self-propelled photovoltaic cleaning vehicle according to claim 1, characterized in that: The drive mechanism includes support gears at both ends of the lower part of the inner side plate of the housing, a drive gear on one side of the support gear, and a gear motor connected to the drive gear in the housing on one side; a support plate is provided on the upper end face of the side beam, and a rack is fixedly installed on the support plate along its length direction, with the support gear and the drive gear pressing on the rack and meshing with it.

6. The multi-stage self-propelled photovoltaic cleaning vehicle according to claim 5, characterized in that: The lower end of the inner side panel of the box has a notch in the middle. A mechanical braking assembly corresponding to the side beam is installed at the notch. The mechanical braking assembly includes a U-shaped bracket, an electric push rod, and a brake pad. The U-shaped bracket is fixedly connected to the notch. The electric push rod is fixed in the middle of the U-shaped bracket. The brake pad is installed at the outer end of the telescopic rod of the electric push rod. The electric push rod pushes the brake pad out of the notch and presses it against the surface of the side beam.

7. A multi-stage self-propelled photovoltaic cleaning vehicle according to claim 6, characterized in that: The electric push rod has a guide rail on its support side. An L-shaped guide rod is mounted on the guide rail via a slider. The inner end of the L-shaped guide rod is fixedly connected to the outer end of the telescopic rod of the electric push rod. A U-shaped bracket is fixedly connected to the outer end of the telescopic rod. A brake pad is fitted into the U-shaped bracket, and a bolt is provided between the U-shaped bracket and the brake pad to lock them together.

8. A multi-stage self-propelled photovoltaic cleaning vehicle according to claim 1, characterized in that: The inner side panel of the housing is provided with a lifting plate in the middle, and a rack and pinion motor is provided at the upper end of the inner side panel. The lower end of the lifting rack in the rack and pinion motor is fixedly connected to the lifting plate. Slide rail slider guide assemblies are provided at both ends of the lifting plate and between the inner side panel.

9. A multi-stage self-propelled photovoltaic cleaning vehicle according to claim 1, characterized in that: A wind speed sensor is installed in the middle of the upper surface of the cleaning cart.

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