Electrically-driven multi-stage dust collection motor sweeper

Abstract

The invention belongs to the technical field of dust collection motor sweepers, and particularly relates to an electrically-driven multi-stage dust collection motor sweeper which comprises a sweeper body and a sweeping assembly, a dust collection assembly and a protection assembly are arranged in the sweeper body, the sweeping assembly comprises a sweeping base, a sweeping roller, a driving wheel and a smashing roller, and the smashing roller is rotationally connected to the inner wall of the sweeping base in a sleeving mode. Garbage and sundries on the road surface are rapidly gathered through the rotating sweeping roller, the sweeping roller synchronously drives the smashing roller and the cutting cutter teeth to rotate at a high speed during operation, the garbage and sundries are smashed and cut, and the granularity of the sundries is effectively reduced; the airflow sensor can sense airflow changes and trigger the electric push rod, so that sealing of the airflow pipe is relieved, high-speed airflow is formed according to the Bernoulli principle to impact the outer walls of the cutter teeth, the positions of blocked sundries are changed, the cutting cutter teeth are assisted to smoothly complete smashing operation, and the overall cleaning operation efficiency of the equipment is greatly improved.

Description

Technical Field

[0001] This invention belongs to the technical field of vacuum sweepers, specifically an electrically driven multi-stage vacuum sweeper. Background Technology

[0002] The vacuum sweeper is an automated sanitation and industrial cleaning equipment that integrates road sweeping, garbage collection, and dust suppression. It relies on mechanical movement, brushes to gather garbage, and a negative pressure dust collection system to collect garbage. Combined with a misting dust suppression structure, it reduces dust. It has high cleaning efficiency, saves a lot of manpower, and can quickly complete the cleaning of large areas of roads and sites.

[0003] A patent with publication number CN111749177B discloses a new energy high-efficiency sweeper. The key technical points are: a sweeper body, a front disc brush at the bottom front side, and symmetrical rear disc brushes on both sides of the bottom rear side; a collection box inside the rear side of the sweeper body, with a fan on one side inside the collection box, a discharge port on the rear exterior side of the collection box, a suction pipe at the bottom of the collection box extending to the outside of the collection box, a suction nozzle at the bottom of the suction pipe located behind the rear disc brushes, a water tank inside the sweeper body located on the side of the collection box, several solar panels at the top of the sweeper body, a top plate at the top inside the collection box, a sliding groove at the bottom of the top plate, and a slider adapted to the sliding groove. Beneficial effect: The pressure plate can compress the garbage inside the sweeper body in a timely manner as the sweeper moves, thus greatly saving space inside the collection box.

[0004] However, the above-mentioned technologies often have the following drawbacks: Although the above-mentioned technical solutions can quickly compress the garbage and impurities collected in the cleaning vehicle by using the pressure plate during the cleaning process through the cooperation of various components, thereby saving space in the collection box, during outdoor cleaning, more resilient garbage and impurities such as branches and leaves are often encountered. Simply relying on wind power to absorb them can easily lead to accumulation and blockage in the air duct, resulting in absorption blockage and reduced cleaning efficiency, which is very detrimental to improving the working effect of the vacuum sweeper.

[0005] Therefore, the present invention provides an electrically driven multi-stage vacuum sweeper. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is: the electric drive multi-stage vacuum sweeper of the present invention includes a vehicle body and a sweeping component, wherein the vacuum component and a protective component are provided inside the vehicle body; The cleaning assembly includes a cleaning seat, a cleaning roller, a drive wheel, and a pulverizing roller. The pulverizing roller is rotatably sleeved on the inner wall of the cleaning seat, and cutting teeth are fixedly sleeved on the outer wall of the pulverizing roller. A suction pipe is installed at the top of the cleaning seat, a control seat is installed on the side wall of the cleaning seat, and an electric push rod is installed on the inner wall of the control seat. The inner wall of the suction pipe is electrically connected to the control end of the electric push rod through an airflow sensor. An airflow pipe is installed at the bottom of the control seat, and the ends of several airflow pipes are installed on the side wall of the cleaning seat. A drive assembly is installed on the outer wall of the cleaning seat.

[0008] Furthermore, the drive assembly includes a mounting base installed at the lower bottom of the vehicle body, a lifting rod mounted on the inner bottom end of the mounting base via a damping spring, a crossbeam mounted on the output end of the lifting rod, the sweeping roller being rotatably sleeved on the inner wall of the crossbeam, and the drive wheel being installed at the drive end of the vehicle body.

[0009] Furthermore, a drive motor is installed on the outer wall of the sweeping seat, and toothed idler wheels are installed on the output end of the drive motor and the outer wall of the sweeping roller. The outer walls of multiple toothed idler wheels are connected by a synchronous belt drive. A pulley is fixedly connected to the outer wall of one of the drive motors and the outer wall of the crushing roller. The outer walls of two pulleys are connected by a transmission belt drive.

[0010] Furthermore, a micro generator and a battery unit are installed on the outer wall of the sweeping seat. Gears are fixedly sleeved on the drive end of the micro generator and the output end of one of the drive motors. The two gears mesh and drive each other. The output end of the micro generator is fixedly connected to the input end of the battery unit through an electrical wire. The output end of the battery unit is fixedly connected to the input end of the electric push rod. A receiver is installed on the control end of the electric push rod.

[0011] Furthermore, the dust collection assembly includes a drive fan, a filter chamber, and a flow guide baffle. The filter chamber is installed on the inner side wall of the vehicle body, and the drive fan is installed on the top of the filter chamber. The input end of the drive fan is fixedly connected to the exhaust end of the filter chamber.

[0012] Furthermore, the flow guide baffle is installed on the inner wall of the filter chamber, the inner wall of the filter chamber is filled with filter media, and the two ends of the suction pipe are respectively installed at the input end of the filter chamber and the output end of the cleaning seat.

[0013] Furthermore, the dust collection assembly also includes an electric push rod installed at the bottom of the vehicle body, and a dust collection seat is installed at the output end of the plurality of electric push rods. A rotating roller brush is rotatably sleeved on the inner wall of the dust collection seat.

[0014] Furthermore, a sprocket is fixedly sleeved on the outer wall of the rotating roller brush, a chain belt is driven sleeved on the outer wall of the sprocket, and a silicone plate is installed at the end of the cleaning seat.

[0015] Furthermore, the protective assembly includes a telescopic seat installed on the outer side wall of the vehicle body, an electric telescopic rod installed on the inner wall of the telescopic seat, a protective rubber plate installed on the output end of the electric telescopic rod, and the protective rubber plate slidably sleeved on the inner wall of the telescopic seat.

[0016] Furthermore, a purge pipe is installed on the outer wall of the vehicle body, and the output end of the purge pipe is fixedly connected to the output end of the drive fan. A control box and a generator are respectively installed on the inner wall of the vehicle body.

[0017] The beneficial effects of this invention are as follows: 1. The electric-driven multi-stage vacuum sweeper of this invention utilizes the coordinated operation of various components of the sweeping assembly. During electric operation, the rotating sweeping rollers quickly gather road debris, which is then efficiently collected by the sweeping seat equipped with negative pressure suction. The sweeping rollers simultaneously drive the crushing rollers and cutting blades to rotate at high speed, breaking down and cutting the debris, effectively reducing particle size and preventing blockage of the suction pipe. Simultaneously, an airflow sensor is linked to an electric push rod. When debris blocks the outer wall of the cutting blades, the airflow sensor detects the change in airflow and triggers the electric push rod, thereby releasing the seal on the airflow pipe. Based on Bernoulli's principle, a high-speed airflow impacts the outer wall of the blades, changing the position of the blockage and helping the cutting blades to smoothly complete the crushing operation. This completely avoids blockage problems during vacuuming and significantly improves the overall cleaning efficiency of the equipment.

[0018] 2. The electric-driven multi-stage vacuum sweeper of this invention, through the coordinated configuration of a drive motor, a micro generator, and a battery unit, allows the micro generator to operate synchronously via a gear transmission structure while the drive motor powers the entire device. This continuously replenishes the battery unit with power, forming a self-sufficient micro power supply system. This effectively ensures sufficient battery power, providing stable and continuous energy for the various actions of the electric push rod, preventing push rod malfunctions and work interruptions due to insufficient power. It also ensures the smooth operation of the sweeping-related actuators. Furthermore, relying on the cooperation of the mounting base, lifting rod, and crossbeam, the lifting rod can be easily manipulated to lift the crossbeam and sweeping seat upwards after the device finishes operation, completely detaching the sweeping seat from the ground. This reduces contact friction and component wear during device movement, significantly improving the flexibility and efficiency of device relocation and extending the service life of the sweeping components.

[0019] 3. The electric-driven multi-stage vacuum sweeper of this invention, through the scientific configuration of the vacuum components, uses a drive fan as the core to continuously provide stable negative pressure airflow to the sweeping seat, ensuring efficient adsorption and collection of garbage and debris. Simultaneously, it is equipped with a filter chamber, flow guide baffles, and built-in filter media to form a multi-stage filtration structure. During vacuuming operations, the flow guide baffles can orderly divert and quickly guide the airflow, allowing the dust-laden airflow to fully contact the filter media, enabling efficient interception and filtration of dust, fine debris, and other impurities. This ensures that the exhaust gas from the equipment is clean and meets standards, preventing secondary environmental pollution caused by dust leakage at the source, thus meeting environmental protection requirements. Furthermore, the vacuum components and protective components work together. After the equipment stops operating, a liftable protective plate can fully cover and protect the core operating components such as the sweeping seat and sweeping rollers, effectively isolating them from external impacts and collisions, preventing damage and deformation of parts, extending the overall service life of the equipment, and preventing debris from accumulating on the surface of the operating components and affecting subsequent cleaning efficiency. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the purge tube in this invention; Figure 3 This is a schematic diagram of the cleaning seat in this invention; Figure 4 This is a schematic diagram of the structure of the electric actuator in this invention; Figure 5 This is a schematic diagram of the internal structure of the cleaning seat in this invention; Figure 6 yes Figure 4 Enlarged view of a portion of point A in the middle; Figure 7 This is a schematic diagram of the interior of the vehicle body in this invention; Figure 8 This is a schematic diagram of the rotary roller brush in this invention; In the diagram: 1. Vehicle body; 2. Sweeping seat; 3. Sweeping roller; 4. Drive wheel; 5. Crushing roller; 6. Cutting blade; 7. Suction pipe; 8. Control seat; 9. Electric push rod; 10. Airflow sensor; 11. Airflow pipe; 12. Mounting seat; 13. Damping spring; 14. Lifting rod; 15. Crossbeam; 16. Drive motor; 17. Toothed idler wheel; 18. Synchronous belt; 19. Pulley; 20. Transmission belt; 21. Micro generator; 22. Battery unit; 23. Gear; 24. Electrical wire; 25. Receiver; 26. Drive fan; 27. Filter chamber; 28. Guide baffle; 29. ​​Electric push rod; 30. Suction seat; 31. Rotating roller brush; 32. Sprocket; 33. Chain belt; 34. Silicone plate; 35. Telescopic seat; 36. Electric telescopic rod; 37. Protective rubber plate; 38. Blowing pipe. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0023] Example: Figures 1 to 8 As shown, an electric-driven multi-stage vacuum sweeper according to an embodiment of the present invention includes a vehicle body 1 and a sweeping assembly. The vacuum assembly and a protective assembly are installed inside the vehicle body 1. The cleaning assembly includes a cleaning seat 2, a cleaning roller 3, a drive wheel 4, and a shredding roller 5. The shredding roller 5 is rotatably sleeved on the inner wall of the cleaning seat 2, and cutting teeth 6 are fixedly sleeved on the outer wall of the shredding roller 5. A suction pipe 7 is installed at the top of the cleaning seat 2, and a control seat 8 is installed on the side wall of the cleaning seat 2. An electric push rod 9 is installed on the inner wall of the control seat 8. The inner wall of the suction pipe 7 is electrically connected to the control end of the electric push rod 9 through an airflow sensor 10. An airflow pipe 11 is installed at the bottom of the control seat 8, and the ends of several airflow pipes 11 are installed on the side wall of the cleaning seat 2. A drive assembly is installed on the outer wall of the sweeping seat 2. A drive motor 16 is installed on the outer wall of the sweeping seat 2. Toothed idler wheels 17 are installed on the output end of the drive motor 16 and the outer wall of the sweeping roller 3. The outer walls of multiple toothed idler wheels 17 are connected by a synchronous belt 18. A pulley 19 is fixedly connected to the outer wall of one of the drive motors 16 and the outer wall of the crushing roller 5. The outer walls of two pulleys 19 are connected by a transmission belt 20. With the setting of the dust collection assembly, the road surface can be cleaned during the operation of the vehicle body 1 by the cooperation of negative pressure wind and the sweeping roller 3. Simultaneously, two opposing crushing rollers 5 are used, with cutting blades 6 rotating at high speed to cut and crush garbage and impurities, reducing their particle size and thus preventing clogging of the suction pipe 7. When the vehicle is running, the drive motor 16 runs synchronously, and the toothed idler wheel 17 and synchronous belt 18 enable the sweeping roller 3 to rotate at high speed, thereby sweeping and removing dust from the road surface. The pulley 19 and transmission belt 20 drive the crushing roller 5 to rotate synchronously at high speed, thereby performing high-speed cutting. When there are some larger impurities during sweeping, such as... Leaves and twigs, due to their shape, are easily blocked on the outside of the cutting teeth 6 and cannot be quickly crushed. At this time, the airflow sensor 10 in the suction pipe 7 senses the decrease in airflow velocity, which causes the electric push rod 9 to move. The contraction of the output end of the electric push rod 9 can release the seal on the bottom of the control seat 8. By utilizing Bernoulli's principle, the airflow is quickly ejected at high speed through multiple airflow pipes 11, thereby blowing away the debris blocked on the outer wall of the cutting teeth 6, making it easier for the cutting teeth 6 to crush the debris at high speed, thus maintaining the high cleaning efficiency of the sweeper.

[0024] The drive assembly includes a mounting base 12 installed at the bottom of the vehicle body 1. A lifting rod 14 is mounted on the inner bottom of the mounting base 12 via a damping spring 13. A crossbeam 15 is mounted on the output end of the lifting rod 14. The sweeping roller 3 is rotatably sleeved on the inner wall of the crossbeam 15. The drive wheel 4 is installed on the drive end of the vehicle body 1. The mounting base 12 can provide sufficient stability for the damping spring 13, thereby ensuring that the lifting rod 14 can move stably. With the cooperation of the lifting rod 14 and the crossbeam 15, when the work is stopped, the lifting rod 14 can be retracted to drive the crossbeam 15 to rise, thereby avoiding impact damage to the components of the sweeping assembly caused by potholes on the road surface.

[0025] A micro generator 21 and a battery unit 22 are installed on the outer wall of the sweeping base 2. Gears 23 are fixedly sleeved on the drive end of the micro generator 21 and the output end of one of the drive motors 16. The two gears 23 mesh and drive each other. The output end of the micro generator 21 is fixedly connected to the input end of the battery unit 22 through the wire 24. The output end of the battery unit 22 is fixedly connected to the input end of the electric push rod 9. A receiver 25 is installed on the control end of the electric push rod 9. Through the cooperation of the micro generator 21 and the battery unit 22, the motor 16 can be driven to run. The meshing transmission of the gears 23 provides power to the micro generator 21. The power is then transmitted to the battery unit 22 for storage through the wire 24. This allows the battery unit 22 to provide power to the electric push rod 9 in real time, maintaining the stability of the overall sweeping process. The receiver 25 can be used to control the sweeping unit by the operator in the cab through a wireless module, thereby increasing the linkage effect of the overall sweeping.

[0026] The dust collection assembly includes a drive fan 26, a filter chamber 27, and a baffle plate 28. The filter chamber 27 is installed on the inner wall of the vehicle body 1, and the drive fan 26 is installed on the top of the filter chamber 27. The input end of the drive fan 26 is fixedly connected to the exhaust end of the filter chamber 27. The baffle plate 28 is installed on the inner wall of the filter chamber 27, and the inner wall of the filter chamber 27 is filled with filter media. The two ends of the suction pipe 7 are respectively installed at the input end of the filter chamber 27 and the output end of the cleaning seat 2. The drive fan 26 can provide negative pressure airflow for the entire cleaning process. The filter chamber 27 and the filter media filled inside can quickly filter the sucked-in dust and exhaust gas, intercepting the dust particles and polluting gases mixed in, thereby maintaining the environmental protection effect of gas emissions. The baffle plate 28 installed on the inner wall of the filter chamber 27 can facilitate the guidance of airflow, increase its contact area with the filter media, and thus improve the filtration and interception effect.

[0027] The dust collection assembly also includes an electric push rod 29 installed at the bottom of the vehicle body 1. The output ends of the multiple electric push rods 29 are equipped with dust collection seats 30. A rotating roller brush 31 is rotatably sleeved on the inner wall of the dust collection seat 30. A sprocket 32 ​​is fixedly sleeved on the outer wall of the rotating roller brush 31. A chain belt 33 is driven sleeved on the outer wall of the sprocket 32. A silicone plate 34 is installed at the end of the sweeping seat 2. Through the dust collection seat 30 at the output end of the electric push rod 29, dust and impurities can be quickly adsorbed after the front end is cleaned. The silicone plate 34 can provide external protection for adsorption, improving the cleaning quality and efficiency of the road surface.

[0028] The protective assembly includes a telescopic seat 35 installed on the outer wall of the vehicle body 1. An electric telescopic rod 36 is installed on the inner wall of the telescopic seat 35. A protective rubber plate 37 is installed at the output end of the electric telescopic rod 36. The protective rubber plate 37 is slidably sleeved on the inner wall of the telescopic seat 35. With the setting of the protective assembly, after daily parking or cleaning, the protective rubber plate 37 at its output end can be adjusted longitudinally by activating the electric telescopic rod 36, thereby physically protecting the entire cleaning assembly and preventing damage to the various parts of the cleaning assembly caused by external impact.

[0029] A blowpipe 38 is installed on the outer wall of the vehicle body 1. The output end of the blowpipe 38 is fixedly connected to the output end of the drive fan 26. A control box and a generator are installed on the inner wall of the vehicle body 1. The control box can facilitate the transfer and connection of multiple electrical components, making it convenient for the driver to operate from the cab. The blowpipe 38 can guide the gas discharged by the drive fan 26 and discharge it from the front of the vehicle body 1 toward the road surface. The airflow impact improves the cleaning efficiency and quality of dust and impurities on the ground.

[0030] Working principle: When the vehicle is running, the drive motor 16 runs synchronously. With the cooperation of the toothed idler wheel 17 and the synchronous belt 18, the sweeping roller 3 can rotate at high speed to sweep and remove dust from the road surface. The pulley 19 and the transmission belt 20 drive the crushing roller 5 to rotate synchronously at high speed for high-speed cutting. When there are some large impurities, such as leaves and branches, they are more likely to block the outside of the cutting teeth 6 due to their size and cannot be quickly crushed. At this time, the airflow sensor 10 in the suction pipe 7 senses the decrease in airflow velocity, which causes the electric push rod 9 to move. The contraction of the output end of the electric push rod 9 can release the seal on the bottom of the control seat 8. Using Bernoulli's principle, the airflow is quickly ejected at high speed through multiple airflow pipes 11, which blows away the debris blocked on the outer wall of the cutting teeth 6, making it easier for the cutting teeth 6 to crush it at high speed, thus maintaining the high cleaning efficiency of the sweeper.

[0031] The terms "front," "back," "left," "right," "top," and "bottom" all refer to the figures in the accompanying drawings. Figure 1Based on the perspective of the observer, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0032] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrically driven multi-stage vacuum sweeper, characterized in that: Includes a vehicle body (1) and a cleaning assembly, wherein the interior of the vehicle body (1) is provided with a dust collection assembly and a protective assembly; The cleaning assembly includes a cleaning seat (2), a cleaning roller (3), a drive wheel (4), and a crushing roller (5). The crushing roller (5) is rotatably sleeved on the inner wall of the cleaning seat (2). A cutting tooth (6) is fixedly sleeved on the outer wall of the crushing roller (5). A suction pipe (7) is installed at the top of the cleaning seat (2). A control seat (8) is installed on the side wall of the cleaning seat (2). An electric push rod (9) is installed on the inner wall of the control seat (8). The inner wall of the suction pipe (7) is electrically connected to the control end of the electric push rod (9) through an airflow sensor (10). An airflow pipe (11) is installed at the bottom of the control seat (8). The ends of several airflow pipes (11) are installed on the side wall of the cleaning seat (2). A drive assembly is installed on the outer wall of the cleaning seat (2).

2. The electrically driven multi-stage vacuum sweeper according to claim 1, characterized in that: The drive assembly includes a mounting base (12) installed at the bottom of the vehicle body (1). A lifting rod (14) is installed at the inner bottom of the mounting base (12) via a damping spring (13). A crossbeam (15) is installed at the output end of the lifting rod (14). The sweeping roller (3) is rotatably sleeved on the inner wall of the crossbeam (15). The drive wheel (4) is installed at the drive end of the vehicle body (1).

3. The electrically driven multi-stage vacuum sweeper according to claim 2, characterized in that: A drive motor (16) is installed on the outer wall of the sweeping seat (2). A toothed idler wheel (17) is installed on the output end of the drive motor (16) and the outer wall of the sweeping roller (3). The outer walls of multiple toothed idler wheels (17) are connected by a synchronous belt (18). A pulley (19) is fixedly connected to the outer wall of one of the drive motors (16) and the outer wall of the crushing roller (5). The outer walls of two pulleys (19) are connected by a transmission belt (20).

4. The electrically driven multi-stage vacuum sweeper according to claim 3, characterized in that: A micro generator (21) and a battery unit (22) are installed on the outer wall of the cleaning seat (2). The drive end of the micro generator (21) and the output end of one of the drive motors (16) are fixedly fitted with gears (23). The two gears (23) mesh and drive each other. The output end of the micro generator (21) is fixedly connected to the input end of the battery unit (22) through an electrical wire (24). The output end of the battery unit (22) is fixedly connected to the input end of the electric push rod (9). The control end of the electric push rod (9) is equipped with a receiver (25).

5. The electrically driven multi-stage vacuum sweeper according to claim 1, characterized in that: The dust collection assembly includes a drive fan (26), a filter chamber (27), and a baffle plate (28). The filter chamber (27) is installed on the inner side wall of the vehicle body (1). The drive fan (26) is installed on the top of the filter chamber (27). The input end of the drive fan (26) is fixedly connected to the exhaust end of the filter chamber (27).

6. The electrically driven multi-stage vacuum sweeper according to claim 5, characterized in that: The flow guide baffle (28) is installed on the inner wall of the filter chamber (27), the inner wall of the filter chamber (27) is filled with filter filler, and the two ends of the suction pipe (7) are respectively installed at the input end of the filter chamber (27) and the output end of the cleaning seat (2).

7. The electrically driven multi-stage vacuum sweeper according to claim 5, characterized in that: The vacuuming assembly also includes an electric push rod (29) installed at the bottom of the vehicle body (1), and a vacuuming seat (30) is installed at the output end of the plurality of electric push rods (29), and a rotating roller brush (31) is rotatably sleeved on the inner wall of the vacuuming seat (30).

8. The electrically driven multi-stage vacuum sweeper according to claim 7, characterized in that: A sprocket (32) is fixedly sleeved on the outer wall of the rotating roller brush (31), and a chain belt (33) is driven sleeved on the outer wall of the sprocket (32). A silicone plate (34) is installed at the end of the cleaning seat (2).

9. The electrically driven multi-stage vacuum sweeper according to claim 8, characterized in that: The protective assembly includes a telescopic seat (35) installed on the outer side wall of the vehicle body (1), an electric telescopic rod (36) installed on the inner wall of the telescopic seat (35), a protective rubber plate (37) installed at the output end of the electric telescopic rod (36), and the protective rubber plate (37) is slidably sleeved on the inner wall of the telescopic seat (35).

10. The electrically driven multi-stage vacuum sweeper according to claim 5, characterized in that: The outer wall of the vehicle body (1) is equipped with a purge pipe (38), the output end of the purge pipe (38) is fixedly connected to the output end of the drive fan (26), and the inner wall of the vehicle body (1) is equipped with a control box and a generator respectively.

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