Sweeper with built-in motor

Abstract

The utility model discloses a built -in motor formula sweeper, relate to the technical field of sweeper, wherein, the sweeper includes the car body, main brush subassembly and side brush subassembly, and main brush subassembly and side brush subassembly install in the lower extreme of car body, main brush subassembly includes the drum, brush, pivot, drive motor, connecting barrel and two end covers, and the drum is hollow structure, and both ends of the drum all have a plurality of positioning recess, brush is connected to the outer circumferential wall of drum, is used for sweeping garbage, pivot is worn in the drum, two end covers are installed in both ends of the drum respectively, and the outer circumferential wall of end cover projects a plurality of positioning protrusions outward, and positioning protrusion installs in the positioning recess, drive motor is located in the drum inside, and fixedly connected in one of end covers, and drive motor is transmission connection with pivot through connecting barrel, and drive motor drives end cover and connecting barrel to rotate, to drive the drum and brush to rotate from both sides, carries out the cleaning operation.

Description

Technical Field

[0001] This utility model relates to the field of sweeper technology, and in particular to a sweeper with a built-in motor. Background Technology

[0002] With the rapid mechanization of urban sanitation, sweepers have become core equipment for cleaning roads, parks, and other areas. The main brush assembly, as the direct cleaning component, determines the overall cleaning effect and maintenance costs. Currently, most mainstream main brushes use a single-sided motor + belt / chain drive structure, where the drive motor is located on the outside of the main brush roller, driving the main brush shaft to rotate via a belt or chain. However, this structure easily leads to uneven force on the main brush shaft, causing eccentric oscillations during long-term operation, resulting in uneven brush wear and missed areas, especially noticeable on rough terrain. Furthermore, belts and chains are prone to loosening and slipping due to dust corrosion, resulting in high power loss, high motor load, and high-frequency noise from friction. Utility Model Content

[0003] The main purpose of this invention is to propose a sweeper with a built-in motor, which aims to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention proposes a built-in motor-driven sweeper, comprising a vehicle body, a main brush assembly, and a side brush assembly, wherein the main brush assembly and the side brush assembly are installed at the lower end of the vehicle body; the main brush assembly includes a roller, bristles, a rotating shaft, a connecting cylinder, a drive motor, and two end caps; the roller has a hollow structure, and both ends of the roller have multiple positioning grooves; the bristles are connected to the outer peripheral wall of the roller for sweeping up debris; the rotating shaft passes through the roller; the two end caps are respectively installed at both ends of the roller, and the outer peripheral wall of the end caps protrudes outward with multiple positioning grooves. The positioning protrusion is installed in the positioning groove; one end of the connecting cylinder is connected to the rotating shaft; the drive motor is an external rotor motor, located inside the drum and connected to one end cover, and the other end of the connecting cylinder is connected to the drive motor. The drive motor drives the connecting cylinder and the rotating shaft to rotate, and the drive motor drives the end cover connected to it to rotate, so as to drive the drum and brush bristles to rotate. The drive motor drives the connecting cylinder and the rotating shaft to rotate, which in turn drives the end cover on the other side to rotate, so as to drive the drum and brush bristles to rotate, in order to perform the cleaning operation.

[0005] In one embodiment, the outer peripheral wall of the end cap is recessed inward to form a plurality of connecting channels between the inside of the roller and the outside.

[0006] In one embodiment, the drive motor has a fixed shaft passing through the end cover, and a first sleeve and a first locking member are sequentially fitted outside the fixed shaft; a second sleeve, a bearing and a second locking member are sequentially fitted outside the rotating shaft, and the two end covers are pressed against the two ends of the roller by the first locking member and the second locking member respectively.

[0007] In one embodiment, the end cap is interference-fitted with the rotating shaft.

[0008] In one embodiment, the connecting cylinder includes a hollow shaft and a flange, the flange being fixedly connected to the rotor of the drive motor.

[0009] In one embodiment, the outer surface of the end cap has a plurality of reinforcing rings protruding outward, the thickness of the reinforcing rings being between 1.5 mm and 5 mm; and the thickness of the end cap being between 15 mm and 20 mm.

[0010] In one embodiment, a swing rod is also sleeved outside the rotating shaft and the fixed shaft, and the other end of the swing rod is hinged to the vehicle body.

[0011] In one embodiment, the main brush assembly further includes a shock absorber sleeved on the bearing; the shock absorber includes an inner ring, an outer ring, and a rubber ring located between the inner ring and the outer ring, the inner ring being sleeved on the bearing.

[0012] In one embodiment, the sweeper also includes a water tank, a water pump, and a nozzle. The water tank is installed at the front end of the vehicle body, and the water pump, nozzle, and water tank are connected by a connecting pipe. The nozzle is located in front of the side brush assembly.

[0013] In one embodiment, the sweeper further includes a waste container, a blower box, and a blower. The blower box and the waste container are installed at the rear end of the vehicle body, and the blower is installed in the blower box. The waste container is located below the blower box, and the front end of the waste container box is located close to the main brush assembly.

[0014] The drive motor of this sweeper is built into the drum. It reduces power loss by using a short path transmission from the motor output end to the rotating shaft, end cover, and drum. The positioning protrusion and positioning groove fit together to prevent the parts from slipping, which improves the power transmission efficiency, makes the main brush rotate more stably, and improves the uniformity of the sweeping speed. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 A first-view structural schematic diagram of an embodiment of the sweeper provided by this utility model; Figure 2A second-view structural schematic diagram of an embodiment of the sweeper provided by this utility model; Figure 3 A schematic diagram of the main brush assembly of a sweeper according to an embodiment of the present invention; Figure 4 A schematic diagram of the internal structure of the main brush assembly in an embodiment of the sweeper provided by this utility model; Figure 5 for Figure 4 A magnified view of a portion of the image; Figure 6 A partial structural schematic diagram of the main brush assembly of a sweeper according to an embodiment of the present invention; Figure 7 A schematic diagram of the roller portion of an embodiment of the sweeper provided by this utility model; Figure 8 This is a schematic diagram of the internal structure of a sweeper according to an embodiment of the present invention.

[0017] Explanation of icon numbers: 10. Vehicle body; 20. Side brush assembly; 30. Main brush assembly; 31. Roller; 311. Positioning groove; 32. Brush bristles; 33. Rotating shaft; 331. Second sleeve; 332. Bearing; 333. Second locking element; 34. End cap; 341. Positioning protrusion; 342. Connecting channel; 343. Reinforcing ring; 35. Drive motor; 351. Fixed shaft; 352. First sleeve; 353. First locking element; 36. Connecting cylinder; 361. Hollow shaft; 362. Flange edge; 37. Swing rod; 38. Shock absorber; 381. Inner ring; 382. Outer ring; 383. Rubber ring; 40. Water tank; 50. Water pump; 60. Nozzle; 70. Waste container; 80. Air box; 90. Blower.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] This utility model proposes a sweeper with a built-in motor.

[0023] Please see Figures 1 to 8 In one embodiment of this utility model, the sweeper includes a vehicle body 10, a main brush assembly 30, and a side brush assembly 20, both of which are mounted on the lower end of the vehicle body 10. The main brush assembly 30 includes a roller 31, bristles 32, a rotating shaft 33, a drive motor 35, a connecting cylinder 35, and two end caps 34. The roller 31 has a hollow structure, and both ends of the roller 31 have multiple positioning grooves 311. The bristles 32 are connected to the outer peripheral wall of the roller 31 for sweeping debris. The two end caps 34 are respectively mounted on both ends of the roller 31, and the outer peripheral wall of the end caps 34 protrudes outward with multiple positioning protrusions 341, which are installed in the positioning grooves 311. The rotating shaft 33 passes through the roller 31 and through one of the end caps. The drive motor 35 is an external rotor motor located inside the roller 31 and fixedly connected to another end cover 34, allowing the drive motor to rotate the end cover. The drive motor 35 is fixedly connected to one end of the connecting cylinder, allowing the drive motor to rotate the connecting cylinder. The other end of the connecting cylinder is connected to the rotating shaft 33. The drive motor 35 rotates the end cover connected to it, thereby rotating the roller and brush bristles. Simultaneously, the drive motor rotates the connecting cylinder and rotating shaft at the other end, thereby rotating the roller and brush bristles to perform the cleaning operation.

[0024] Specifically, in this embodiment, the roller 31 adopts a hollow design, with multiple positioning grooves 311 at both ends. The positioning grooves 311 can precisely match the structure of the end cap 34. The hollow structure also provides space for the internal installation of the rotating shaft 33, connecting cylinder 36, and drive motor 35. Brush bristles 32 are connected to the outer peripheral wall of the roller 31 and are evenly distributed in a strip shape on the surface of the roller 31. As a cleaning component that directly contacts the ground, they can achieve dust sweeping and collection through rotation. The rotating shaft 33 is a long, rod-shaped structure that passes through the interior of the roller 31 along its axial direction. One end is connected to one end of the connecting cylinder, and the other end of the connecting cylinder is connected to the drive motor 35. The other end of the rotating shaft can be positioned in conjunction with the end cap 34 for power transmission. There are two end caps 34, corresponding to both ends of the roller 31. Multiple positioning protrusions 341 protrude outward from the outer peripheral wall of the end cap 34. The number and shape of the positioning protrusions 341 are adapted to the positioning grooves 311 at the ends of the roller 31. The end cap 34 has a pre-drilled mounting hole in the center, which can be used with the rotating shaft 33 and the drive motor 35. The drive motor 35 is adapted to the hollow space of the drum 31 and is located inside the drum 31, providing a power source for cleaning.

[0025] The drive motor is an external rotor motor. One end of the rotor is fixedly connected to one end cover, and the other end is connected to one end of a connecting cylinder. This allows the rotor to rotate simultaneously, driving both end covers and the connecting cylinder to rotate. The rotation of the end cover connected to the drive motor drives the roller and brush bristles; simultaneously, the connecting cylinder also drives the shaft to rotate, passing through the other end cover away from the drive motor. This other end cover, from the other side, drives the roller and brush bristles to rotate, thus performing the cleaning operation. This application, through the dual-end transmission design of the external rotor motor, ensures even force distribution on both ends of the roller, resulting in smoother brush rotation and avoiding uneven cleaning caused by unilateral force, thereby improving cleaning effectiveness. Furthermore, the dual-end transmission design disperses torque, reducing the load on a single transmission path and improving transmission efficiency and reliability.

[0026] The drive motor 35 of this sweeper is built into the drum 31, resulting in a shorter transmission path and reducing power loss associated with traditional external motors that rely on belts and chains. Furthermore, the positioning protrusions 341 and grooves engage to prevent slippage between components, improving power transmission efficiency, stabilizing the main brush rotation, and enhancing the uniformity of cleaning speed. The hollow drum 31 integrates the drive motor 35 and the shaft 33, achieving a built-in component design that significantly reduces the overall size of the main brush assembly 30, fitting into the limited installation space at the bottom of the vehicle body 10. Simultaneously, the drum 31's outer shell protects the internal motor and shaft 33 from ground dust and sewage, reducing the probability of component failure and extending their service life. The fitting and positioning of the end cap 34 with the drum 31, and the tight fit between the shaft 33 and the end cap 34, ensure that the main brush rotates without eccentric oscillation, allowing the bristles 32 to contact the ground evenly. This avoids the uneven wear and missed areas caused by traditional single-sided drive. The stable power output of the built-in motor keeps the bristle speed constant, improving the consistency of cleaning performance in different areas.

[0027] Furthermore, the outer peripheral wall of the end cap 34 is recessed inward to form a plurality of connecting channels 342 that connect the interior of the roller 31 to the outside.

[0028] Specifically, in this embodiment, the end cap 34, as a key component connecting the roller 31 and internal parts in the main brush assembly 30, has an inwardly recessed structure formed on its outer peripheral wall. This recess is not a single groove, but rather multiple independent units spaced apart along the circumference of the end cap 34, ultimately forming a channel-like connecting channel 342 that connects the interior of the roller 31 with the outside. Morphologically, the connecting channel 342 is recessed inward based on the outer peripheral wall of the end cap 34, preserving the integrity of the outer peripheral contour of the end cap 34 and the roller 31 while forming a path connecting the inside and outside through the recessed space. In terms of quantity, the multiple connecting channels 342 are evenly distributed, ensuring a balanced circumferential connection effect of the roller 31 and preventing functional loss in local areas due to the absence of connecting channels 342.

[0029] The drive motor 35 continuously generates heat when rotating at high speed inside the drum 31. The enclosed end cap 34 is prone to heat accumulation, leading to motor overheating and performance degradation. However, the connecting channel 342, through its internal and external pathways, allows for natural convection. Low-temperature airflow from the outside enters the drum 31 through the connecting channel 342, exchanges heat with the motor and other heat-generating components, and then exits through other connecting channels 342, achieving passive cooling. This effectively reduces the internal temperature of the drum 31 and extends the service life of components such as the drive motor 35 and bearings 332. The air inside the drum 31 expands when heated. If the structure were enclosed, the internal air pressure would be higher than the external pressure, potentially causing deformation at the mating point between the end cap 34 and the drum 31, affecting positioning accuracy. The connecting channel 342 can balance the internal and external air pressure of the roller 31 in real time. When the internal air pressure rises, excess air is discharged through the connecting channel 342; when the air pressure drops, external air is introduced to keep the internal and external air pressure consistent, so as to avoid structural deformation of the end cover 34 and roller 31 due to air pressure difference and maintain the assembly accuracy and operational stability of the main brush assembly 30.

[0030] Furthermore, the drive motor 35 has a fixed shaft 351 that passes through the end cover 34. A first sleeve 352 and a first locking member 353 are sequentially sleeved on the fixed shaft 351. A second sleeve 331, a bearing 332, and a second locking member 333 are sequentially sleeved on the rotating shaft 33. The first locking member 353 and the second locking member 333 are used to press the two end covers 34 against the two ends of the roller 31 respectively.

[0031] Specifically, in this embodiment, the fixed shaft 351 and the drive motor 35 are an integrated structure. The fixed shaft 351 is fixedly connected to the stator of the drive motor 35 and forms a clearance fit with the end cover 34 when passing through the center hole of the end cover 34, ensuring that the rotation of the end cover 34 does not affect the fixed shaft. The first sleeve 352 is sleeved on the outside of the fixed shaft 351, with one end abutting against the outer side of the end cover 34 and the other end abutting against the first locking member 353. The first locking member 353 is connected to the fixed shaft 351 by thread or snap-fit. When tightened or snapped, axial pressure is applied to the first sleeve 352, and the first sleeve 352 transmits the pressure to the end cover 34, so that the end cover 34 is tightly attached to the corresponding end face of the roller 31, thereby achieving axial fixation between the end cover 34 and the roller 31. The rotating shaft 33 is connected to the rotor of the drive motor 35 through the connecting cylinder 36, and its end away from the drive motor 35 is fitted with the center hole of the corresponding end cover 34 (the end cover 34 on the side not connected to the drive motor 35). The second sleeve 331 is fitted on the outside of the rotating shaft 33, with one end abutting against the outer side of the end cover 34 and the other end abutting against the inner ring of the bearing 332. The inner ring rotates synchronously with the rotating shaft 33. The second locking member 333 is threaded or snap-fitted to the rotating shaft 33. When tightened, it applies axial pressure to the inner ring of the bearing 332. The inner ring of the bearing 332 transmits the pressure to the end cover 34 through the second sleeve 331, so that the end cover 34 is also tightly attached to the corresponding end face of the roller 31, forming a bidirectional locking with the side of the fixed shaft 351.

[0032] This application utilizes the bidirectional axial pressure of the first locking member 353 and the second locking member 333 to ensure that the end cap 34 and the two end faces of the roller 31 are in close contact. The positioning protrusion 341 of the end cap 34 and the positioning groove 311 of the roller 31 fit more tightly, which can effectively prevent the end cap 34 and the roller 31 from becoming relatively loose due to vibration when the main brush assembly 30 rotates at high speed. This avoids deviation of the brush bristle rotation trajectory or a decrease in cleaning efficiency, and improves the operational stability of the main brush assembly 30. The axial locking effect of the first locking member 353 and the second locking member 333 can fix the axial position of components such as the fixed shaft 351 of the drive motor 35, the rotating shaft 33, and the bearing 332, preventing collisions or wear caused by axial movement of components when the main brush assembly 30 is running.

[0033] In an optional embodiment, the end cap 34 and the rotating shaft 33 are interference-fitted. Specifically, in this embodiment, the end cap 34 achieves circumferential positioning by engaging with the positioning groove 311 of the roller 31 through the positioning protrusion 341 on its outer peripheral wall; and the interference fit between the end cap 34 and the rotating shaft 33 further binds the end cap 34 and the rotating shaft 33 into a synchronous rotation unit. When the drive motor 35 drives the rotating shaft 33 to rotate, the clamping force generated by the interference fit of the rotating shaft 33 directly drives the end cap 34 to rotate, and the end cap 34 then drives the roller 31 and the bristles 32 to rotate through the engagement structure of the positioning protrusion and the positioning groove, forming a rigid transmission chain of drive motor 35 - rotating shaft 33 - end cap 34 - roller 31, avoiding the transmission delay that may occur in traditional clearance fits. The rigid connection formed by the interference fit eliminates the gap between the end cap 34 and the rotating shaft 33. The rotational torque of the drive motor 35 can be directly and without delay transmitted to the end cap 34, which is far away from the drive motor 35, through the rotating shaft 33, and then synchronously transmitted to the roller 31 and the brush bristles 32, making the main brush rotate more synchronously and the cleaning power stronger.

[0034] Furthermore, the connecting cylinder 36 includes a hollow shaft 361 and a flange 362, with the flange 362 fixedly connected to the rotor of the drive motor 35.

[0035] Specifically, in this embodiment, the connecting cylinder 36 has a flange structure, including a hollow shaft 361 and a flange edge 362. The flange edge 362 is fixedly connected to the rotor of the drive motor 35, and the hollow shaft 361 of the connecting cylinder 36 is sleeved on the rotating shaft 33. The flange-type connecting cylinder 36 is rigidly fixed to the rotor of the drive motor 35 through the flange edge 362. The end face of the rotor of the drive motor 35 is a flat mounting surface, and the flange edge 362 fits against this mounting surface, so that the bolt holes of the two are completely aligned; then, bolts are passed through the bolt holes of the flange edge 362 and the mounting holes of the rotor, and tightened to achieve a tight lock between the two. This connection method can limit the relative rotation and axial movement of the connecting cylinder 36 and the rotor, ensuring that the rotational torque output by the motor is transmitted to the connecting cylinder 36 without loss, so that the torque output by the motor can be directly transmitted to the rotating shaft 33 through the rigid structure without slippage or lag.

[0036] Furthermore, the outer surface of the end cap 34 has multiple reinforcing rings 343 protruding outward, the thickness of the reinforcing rings 343 being between 1.5mm and 5mm; and the thickness of the end cap 34 being between 15mm and 20mm.

[0037] Specifically, in this embodiment, the reinforcing ring 343 is an annular protrusion integrally formed on the outer surface of the end cap 34, distributed radially at intervals along the end cap 34 (e.g., 1-3 rings are arranged sequentially from the center of the end cap 34 to the edge), forming a concentric reinforcing layout. Its thickness is controlled within the range of 1.5mm to 5mm, avoiding both insufficient reinforcement due to excessive thinness and increased overall weight and material cost due to excessive thickness. The height of the ring is typically matched to its thickness, ensuring maximum structural rigidity within a limited space, and the protruding surface is smooth and burr-free, preventing snagging of debris or scratching of the ground during cleaning operations. The overall thickness of the end cap 34 is set to 15mm to 20mm, a size that balances structural strength and lightweight requirements. The lower limit of 15mm ensures the basic load-bearing capacity of the end cap 34, preventing deformation of the mounting holes or breakage due to excessive thinness; the upper limit of 20mm controls the weight of the end cap 34, preventing excessive load on the main brush assembly 30 and affecting operational flexibility.

[0038] Furthermore, a swing rod 37 is also sleeved outside the rotating shaft 33 and the fixed shaft 351, and the other end of the swing rod 37 is connected to the vehicle body 10.

[0039] Specifically, in this embodiment, the swing arm 37 serves as a connecting support component between the main brush assembly 30 and the vehicle body 10, and has an elongated structure. Each end of the swing arm 37 has an adapter hole. One end of the swing arm 37 is fitted onto the outside of the rotating shaft 33, and the other end is connected to one side of the vehicle body 10 in the width direction. The other swing arm 37 has one end fitted onto the outside of the fixed shaft 351, and the other end is connected to the other side of the vehicle body 10 in the width direction. The length of the swing arm 37 must precisely match the installation distance between the main brush assembly 30 and the vehicle body 10 to ensure that the main brush assembly 30 maintains a horizontal and ground-hugging cleaning posture after assembly. The swing arm 37 can be made of high-strength metal (such as stainless steel or alloy steel) or reinforced engineering plastic, possessing both rigidity and a certain degree of toughness.

[0040] Furthermore, the main brush assembly 30 also includes a shock absorber 38 sleeved on the bearing 332. The shock absorber 38 includes an inner ring 381, an outer ring 382, ​​and a rubber ring 383 located between the inner ring 381 and the outer ring 382. The inner ring 381 is sleeved on the bearing 332.

[0041] Specifically, the shock absorber 38 serves as a vibration damping component for the main brush assembly 30. The inner ring 381 is a rigid annular component, typically made of metal (such as steel or aluminum alloy) or high-strength engineering plastic. Its inner diameter precisely matches the outer ring diameter of the bearing 332, and its smooth, burr-free inner wall ensures a tight fit around the bearing 332 without radial loosening. The axial length of the inner ring 381 is approximately the same as the width of the bearing 332, completely covering the outer ring and preventing damping failure due to uneven local stress. The rubber ring 383, located between the inner ring 381 and the outer ring 382, ​​is an elastomer component made of highly elastic, aging-resistant rubber materials (such as natural rubber or nitrile rubber). It is tightly bonded to the inner ring 381 and the outer ring 382 through a vulcanization process. The outer ring 382 is also a rigid annular component, made of the same material as the inner ring 381. The axial length of the outer ring 382 is aligned with that of the inner ring 381 and the rubber ring 383, ensuring that the three-layer structure is subjected to coordinated force and there is no risk of axial misalignment. Unbuffered vibration can easily cause fatigue damage to core components such as the bearing 332, the shaft 33, and the drive motor 35. The rubber ring 383 of the shock absorber 38 can effectively absorb the radial vibration of the shaft 33 during rotation and the axial vibration generated by the impact of the ground. For example, when the main brush encounters a ground protrusion, the impact vibration is transmitted to the shock absorber 38 through the bearing 332. The rubber ring 383 buffers the impact energy through deformation, preventing the main brush assembly 30 from shaking violently.

[0042] Furthermore, the sweeper also includes a water tank 40, a water pump 50, and a nozzle 60. The water tank 40 is installed at the front end of the vehicle body 10. The water pump 50, the nozzle 60, and the water tank 40 are connected by a connecting pipe. The nozzle 60 is located on the front side of the side brush assembly 20.

[0043] Specifically, in this embodiment, the water tank 40 serves as a water storage component, with an overall rectangular or irregularly shaped box structure (adapted to the front space of the vehicle body 10). It is made of high-strength plastic (such as polyethylene) or stainless steel, possessing impact resistance and corrosion resistance. The water tank 40 has a water inlet (with a sealing cap) on the top and a water outlet (adapted to water pipe interfaces) on the side or bottom. Some water tanks 40 also have a built-in liquid level sensor, which can monitor the water volume in real time and provide feedback to the vehicle body 10 control system. The water pump 50 is a power supply component for water supply, and the nozzle 60 is a water spraying execution component, employing an atomization or columnar water spray design. The nozzle material is wear-resistant ceramic or stainless steel to prevent water spray deviation caused by long-term wear. The number of nozzles 60 is usually matched with the number of side brush assemblies 20 (e.g., two nozzles 60 correspond to two side brushes). The nozzle 60 sprays water in front of the side brush assembly 20, which can pre-wet the ground so that dust particles are less likely to be stirred up after absorbing the moisture. Especially on dry roads or dusty areas (such as construction sites and mining roads), it can reduce the amount of dust generated by sweeping operations by 60% to 80%, and avoid dust pollution to the surrounding air environment, which meets the requirements of environmental protection operations.

[0044] Furthermore, the sweeper also includes a garbage container 70, a blower box 80, and a blower 90. The blower box 80 and the garbage container 70 are installed at the rear end of the vehicle body 10, and the blower 90 is installed on the blower box 80. The garbage container 70 is located below the blower box 80, and the front end of the garbage container 70 is located close to the main brush assembly 30.

[0045] Specifically, in this embodiment, both the air box 80 and the waste container 70 are installed at the rear end of the vehicle body 10, forming a vertical stacked layout with the air box 80 on top and the waste container 70 below, making full use of the vertical space at the rear end of the vehicle body 10. The waste container 70 has openings at both the top and front. The air duct at the bottom of the air box 80 connects to the opening at the top of the waste container 70. The negative pressure generated by the blower 90 is transmitted to the waste container 70 through the air box 80, creating a stable suction inside the container. Simultaneously, the front end of the waste container 70 is close to the main brush assembly 30. Under the action of the negative pressure airflow, the waste swept by the main brush assembly 30 can directly enter the container from the front opening of the waste container 70, forming a complete collection chain of "main brush sweeping → negative pressure adsorption → waste storage". The waste swept by the main brush assembly 30 (including light fallen leaves, paper scraps, and small particles) can be quickly adsorbed into the waste container 70, avoiding the problem of waste splashing in traditional mechanical sweeping. The vertical layout and close connection of the air box 80 and the garbage container 70 shorten the garbage transport path and reduce negative pressure loss. The blower 90 does not need to have excessive power to meet the collection needs, which can save energy and improve the sweeper's endurance.

[0046] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A sweeper with a built-in motor, characterized in that, The system includes a vehicle body, a main brush assembly, and a side brush assembly, both of which are mounted on the lower end of the vehicle body. The main brush assembly includes: The roller has a hollow structure and multiple positioning grooves at both ends. Brush bristles, attached to the outer peripheral wall of the roller, are used to sweep away debris; A rotating shaft is inserted inside the drum; Two end caps are respectively installed at both ends of the roller. The outer peripheral wall of the end cap has multiple positioning protrusions that are installed in the positioning grooves. A connecting cylinder, one end of which is connected to the rotating shaft; The drive motor, which is an external rotor motor, is located inside the drum and connected to one end cover. The other end of the connecting cylinder is connected to the drive motor. The drive motor drives the connecting cylinder and the rotating shaft to rotate. The drive motor drives the end cover connected to it to rotate, thereby driving the drum and brush to rotate. The drive motor also drives the connecting cylinder and the rotating shaft to rotate, thereby driving the end cover on the other side to rotate, thereby driving the drum and brush to rotate, in order to perform the cleaning operation.

2. The built-in motor sweeper as described in claim 1, characterized in that, The outer peripheral wall of the end cap is recessed inward to form multiple connecting channels that connect the inside of the roller to the outside.

3. The built-in motor sweeper as described in claim 1, characterized in that, The drive motor has a fixed shaft that passes through the end cover. A first sleeve and a first locking member are sequentially fitted outside the fixed shaft. A second sleeve, a bearing, and a second locking member are sequentially fitted outside the rotating shaft. The first locking member and the second locking member press the two end covers against the two ends of the roller respectively.

4. The built-in motor sweeper as described in claim 2, characterized in that, The end cap is interference-fitted with the rotating shaft.

5. The built-in motor sweeper as described in claim 1, characterized in that, The connecting cylinder includes a hollow shaft and a flange, the flange being fixedly connected to the rotor of the drive motor.

6. The built-in motor sweeper as described in claim 1, characterized in that, The outer surface of the end cap has multiple reinforcing rings protruding outwards, the thickness of which is between 1.5mm and 5mm; the thickness of the end cap is between 15mm and 20mm.

7. The built-in motor sweeper as described in claim 3, characterized in that, A swing rod is also sleeved outside the rotating shaft and the fixed shaft, and the other end of the swing rod is hinged to the vehicle body.

8. The built-in motor sweeper as described in claim 3, characterized in that, The main brush assembly also includes a shock absorber fitted around the bearing; the shock absorber includes an inner ring, an outer ring, and a rubber ring located between the inner ring and the outer ring, the inner ring being fitted onto the bearing.

9. The built-in motor sweeper as described in claim 1, characterized in that, The sweeper also includes a water tank, a water pump, and a nozzle. The water tank is installed at the front of the vehicle body. The water pump, nozzle, and water tank are connected by a connecting pipe. The nozzle is located on the front side of the side brush assembly.

10. The built-in motor sweeper as described in claim 1, characterized in that, The sweeper also includes a garbage container, a blower box, and a blower. The blower box and the garbage container are installed at the rear of the vehicle body, and the blower is installed in the blower box. The garbage container is located below the blower box, and the front end of the garbage container is located near the main brush assembly.

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