Electric sweeper

Abstract

The utility model discloses an electric sweeper, relate to the technical field of sweeper, wherein, electric sweeper includes frame, battery pack, walking mechanism, cleaning mechanism and central control module. The battery pack is installed in the middle section position of frame, and the battery pack is equipped with BMS battery management system, walking mechanism includes a front wheel and two rear wheels, and the front wheel is drive steering driving wheel, and two rear wheels are driven wheels, and the front wheel is located in the middle position of frame front end, and the rear wheel is located in the rear end of frame, cleaning mechanism includes two side brush subassembly and a main brush subassembly, and two side brush subassembly are located in the both sides of front wheel, and main brush subassembly is located in the rear end of side brush, central control module is electrically connected with battery pack, drive mechanism, cleaning mechanism, and central control module is configured to form closed loop control through CAN bus, and according to the power data of operating condition and BMS battery management system feedback adjustment each partial power distribution, when SOC is less than threshold value or monomer pressure difference exceeds threshold value, limit walking motor power.

Description

Technical Field

[0001] This utility model relates to the field of sweeper technology, and in particular to an electric sweeper. Background Technology

[0002] Most existing sweepers adopt dual front-wheel drive or four-wheel layout, and the steering relies on mechanical linkage transmission or dual-wheel differential control. The turning radius is large, making it difficult to turn or turn around in narrow passages. They are prone to bumping into obstacles, which limits their application in compact spaces. Utility Model Content

[0003] The main purpose of this utility model is to propose an electric sweeper that aims to improve the sweeper's adaptability in narrow spaces.

[0004] To achieve the above objectives, the electric sweeper proposed in this utility model includes a frame, a battery pack, a walking mechanism, a sweeping mechanism, and a central control module. The battery pack is installed in the middle of the frame and is equipped with a BMS battery management system, which estimates the SOC and SOH in real time. The walking mechanism is installed below the frame and includes one front wheel and two rear wheels. The front wheel is the driving and steering wheel, and the two rear wheels are driven wheels. The front wheel is located in the middle of the front end of the frame, and the rear wheels are located at the rear end of the frame to reduce the turning radius. The bending radius; the sweeping mechanism is installed under the frame and includes two side brush assemblies and one main brush assembly. The two side brush assemblies are located on both sides of the front wheel, and the main brush assembly is located at the rear end of the side brushes; the central control module is installed on the frame and electrically connected to the battery pack, drive mechanism, and sweeping mechanism. The central control module is configured to form a closed-loop control through the CAN bus, and adjust the power distribution of each part according to the working conditions and the power data fed back by the BMS battery management system. When the SOC is less than the threshold or the single-cell voltage difference exceeds the threshold, the power of the walking motor is limited.

[0005] In one embodiment, the electric sweeper further includes a mounting bracket connected to the rear wheel and a rubber shock absorber. The mounting bracket is L-shaped and includes a horizontal wall and a vertical wall. The upper end of the rubber shock absorber is fixedly connected to the vehicle frame, and the lower end of the rubber shock absorber is fixedly connected to the horizontal wall. The rear wheel is rotatably connected to the vertical wall.

[0006] In one embodiment, the rubber shock absorber includes an integrally connected main body and a mounting post. The main body is connected to the vehicle frame, and the mounting post is used to connect to the mounting bracket. The main body is made of rubber, and the mounting post is made of metal.

[0007] In one embodiment, the main body includes an integrally formed first mounting part, a second mounting part, and a connecting block part connecting the first mounting part and the second mounting part. Both the first mounting part and the second mounting part are U-shaped, and their U-shaped openings are arranged opposite to each other. The size of the U-shaped opening of the second mounting part is smaller than the size of the U-shaped opening of the first mounting part.

[0008] In one embodiment, the rubber shock absorber further includes a positioning post that penetrates the horizontal wall.

[0009] In one embodiment, the electric sweeper further includes a drive steering assembly mounted on the front end of the frame, and the front wheels are mounted on the drive steering assembly; the drive steering assembly is electrically connected to the central control module and is used to drive the front wheels to rotate and steer.

[0010] In one embodiment, the electric sweeper further includes a wind box, a blower, and a garbage storage chamber mounted on the vehicle frame; the garbage storage chamber is located directly below the wind box and behind the main brush assembly; the blower is mounted on the wind box and is used to create negative pressure in the garbage storage chamber to receive garbage swept by the main brush assembly.

[0011] In one embodiment, the electric sweeper further includes a mounting bracket extending from the front end of the frame, the mounting bracket being used to mount a functional module.

[0012] In one embodiment, the waste storage compartment is located at the rear end of the vehicle frame, and the waste storage compartment is removably connected to the vehicle frame.

[0013] In one embodiment, the electric sweeper further includes a dust suppression spray module, which includes a water tank, a water pump, and atomizing nozzles. The water tank is installed at the front end of the vehicle frame, the water pump is installed on the vehicle frame and disposed on one side of the air box, and the atomizing nozzles are connected to the vehicle frame and disposed facing the front of the side brush assembly.

[0014] The technical solution of this utility model adopts a layout of single front-wheel drive steering + dual rear-wheel driven, which greatly reduces the turning radius of the vehicle. Combined with the design of the front wheels being centered and the side brushes being placed on the side, the vehicle can flexibly turn and operate in restricted spaces such as narrow alleys and elevator shafts, avoiding collisions with obstacles. 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 schematic diagram of the structure of an embodiment of the electric sweeper provided by this utility model from one perspective; Figure 2 A structural schematic diagram from another perspective of an embodiment of the electric sweeper provided by this utility model; Figure 3 A schematic diagram of the internal structure of an embodiment of the electric sweeper provided by this utility model; Figure 4 A schematic diagram of the drive steering assembly of an embodiment of the electric sweeper provided by this utility model; Figure 5 A schematic diagram of the structure of a rubber shock absorber in an embodiment of the electric sweeper provided by this utility model; Figure 6 A schematic diagram of the rear wheel mounting structure of an embodiment of the electric sweeper provided by this utility model.

[0017] Explanation of icon numbers: 10. Frame; 11. Mounting bracket; 12. Mounting support; 13. Support; 14. Base; 15. Top mount; 16. Sliding rod; 17. Elastic element; 20. Battery pack; 30. Walking mechanism; 31. Front wheel; 32. Rear wheel; 40. Sweeping mechanism; 41. Side brush assembly; 42. Main brush assembly; 50. Rubber shock absorber; 51. Main body; 511. First mounting part; 512. Second mounting part; 513. Connecting block part; 52. Mounting post; 53. Positioning post; 60. Drive steering assembly; 61. Drive motor; 62. Steering motor; 63. Mounting plate; 64. Drive gear; 65. Driven gear; 66. Connector; 70. Air box; 71. Fan; 80. Garbage storage chamber; 90. Spray dust suppression module; 91. Water tank; 92. Water pump; 93. Atomizing nozzle.

[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 an electric sweeper.

[0023] Please see Figures 1 to 6In one embodiment of this utility model, the electric sweeper includes a frame 10, a battery pack 20, a walking mechanism 30, a sweeping mechanism 40, and a central control module (not shown in the figure). The battery pack 20 is installed in the middle of the frame 10 and is equipped with a BMS battery management system, which estimates the SOC and SOH in real time. The walking mechanism 30 is installed below the frame 10 and includes one front wheel 31 and two rear wheels 32. The front wheel 31 is the driving and steering active wheel, and the two rear wheels 32 are the driven wheels. The front wheel 31 is located in the middle of the front end of the frame 10, and the rear wheels 32 are located at the rear end of the frame 10 to reduce the turning radius. The sweeping mechanism 40 is installed below the frame 10 and includes two side brush assemblies 41 and one main brush assembly 42. The two side brush assemblies 41 are located on both sides of the front wheel 31, and the main brush assembly 42 is located at the rear end of the side brushes. The central control module is installed on the frame 10 and is electrically connected to the battery pack 20, drive mechanism and sweeping mechanism 40. The central control module is configured to form a closed-loop control through the CAN bus, and adjust the power distribution of each part according to the working conditions and the power data fed back by the BMS battery management system. When the SOC is less than the threshold or the single cell voltage difference exceeds the threshold, the power of the walking motor is limited.

[0024] Specifically, in this embodiment, the frame 10 serves as the mounting and supporting base for all components of the vehicle, providing a stable mounting reference for the battery pack 20, the walking mechanism 30, the sweeping mechanism 40, and the central control module. The battery pack 20 is installed in the middle section of the frame 10 and is equipped with an independent BMS battery management system, capable of real-time estimation of SOC (State of Charge) and SOH (State of Health). The walking mechanism 30 adopts a single front wheel 31 drive steering + dual rear wheel 32 driven layout. The front wheel 31 is located at the front center of the frame 10, and the rear wheels 32 are located at the rear end of the frame 10. The front wheel 31 is the drive steering active wheel. The sweeping mechanism 40 includes two side brush assemblies 41 and one main brush assembly 42. The side brush assemblies 41 are located on both sides of the front wheel 31, and the main brush assembly 42 is located at the rear end of the side brushes, both installed below the frame 10. The central control module is installed on the frame 10 and establishes an electrical connection with the battery pack 20, the driving mechanism, and the sweeping mechanism 40 via a CAN bus, possessing closed-loop control and dynamic power distribution functions. The battery pack 20, the walking mechanism 30, the sweeping mechanism 40, and the central control module are all directly mounted on the frame 10. Through a reasonable spatial layout, the frame 10 centrally positions the battery pack 20 (middle section), places the walking mechanism 30 at the front and rear, and positions the sweeping mechanism 40 at the bottom working area, forming a compact overall frame 10 structure. The central control module is the core of the vehicle's coordinated control. It receives SOC, SOH, and individual cell differential pressure data from the BMS battery management system via the CAN bus, and simultaneously sends power adjustment commands to the drive mechanism (associated with the walking mechanism 30) and the sweeping mechanism 40, forming a closed-loop control link of status acquisition – command issuance – execution feedback.

[0025] The electric cleaning vehicle of this application utilizes a single front wheel 31 for drive and steering, along with dual rear wheels 32 for driven operation, significantly reducing the vehicle's turning radius. Combined with the centered front wheel 31 and side-mounted brushes, this allows the vehicle to maneuver flexibly in confined spaces such as narrow alleys and elevator shafts, avoiding collisions with obstacles. The BMS battery management system accurately monitors battery status, and the central control module dynamically adjusts power based on SOC and individual cell voltage difference data. When the battery is low (SOC < 10%) or malfunctioning, the power of the walking motor is limited, preventing safety risks such as over-discharge and short circuits, while ensuring low-speed return and improving range reliability. The side brushes, located on either side of the front wheel 31, gather debris from both sides towards the center, where the rear main brush collects it, forming a continuous cleaning process of gathering and collecting, reducing blind spots. The central control module coordinates the walking and cleaning power, preventing a disconnect between operation and driving actions, and improving cleaning efficiency per cycle.

[0026] It's important to clarify that SOC (State of Charge) refers to the battery's state of charge, which can be simply understood as the percentage of remaining charge. It indicates the proportion of the battery's current stored capacity relative to its rated capacity (e.g., SOC=80% means the battery has 80% of its rated capacity remaining). SOH (State of Health) reflects the degree of performance degradation of the battery compared to its pristine state (e.g., SOH=90% means the battery's current capacity is 90% of its initial rated capacity). SOH is primarily assessed through indicators such as cycle count, capacity decay rate, and internal resistance change to determine the degree of battery aging and its lifespan.

[0027] Furthermore, the electric sweeper also includes a mounting bracket 11 connected to the rear wheel 32 and a rubber shock absorber 50. The mounting bracket 11 is L-shaped and includes a horizontal wall and a vertical wall. The upper end of the rubber shock absorber 50 is fixedly connected to the frame 10, the lower end of the rubber shock absorber 50 is fixedly connected to the horizontal wall, and the rear wheel 32 is rotatably connected to the vertical wall.

[0028] Specifically, in this embodiment, the mounting frame 11 is connected to the rear wheel 32 and has an overall L-shaped structure, including a horizontal wall (lateral extension) and a vertical wall (vertical extension), serving as a transitional component between the rear wheel 32 and the frame 10. The upper end of the rubber shock absorber 50 is fixedly connected to the frame 10, and the lower end is fixedly connected to the horizontal wall of the mounting frame 11, providing vibration damping. The rear wheel 32 is rotatably connected to the vertical wall of the mounting frame 11 and can rotate freely around its own axis (driven wheel characteristics). Through its own elastic deformation, the rubber shock absorber 50 can buffer the impact of road bumps on the rear wheel 32 (such as paving stone joints, small stone protrusions, etc.), reducing the transmission of vibration to the frame 10, avoiding the shaking of the frame 10 caused by the vibration of the rear wheel 32, thereby reducing the operational deviation of the side brush, main brush, and other cleaning mechanisms 40 and improving cleaning accuracy. The horizontal and vertical walls of the mounting bracket 11 form a right-angle support structure, which can distribute the vertical load (vehicle weight) and horizontal load (lateral force during steering) borne by the rear wheel 32 to the rubber damper 50, avoiding stress concentration at a single connection point. At the same time, the elastic buffering effect of the rubber damper 50 reduces the rigid impact on the rear wheel 32 bearings, extending their service life. Combined with the small turning radius characteristic of single front wheel steering, the rear wheel 32 can adapt to minor road undulations through the rubber damper 50, ensuring stable ground contact of the entire vehicle when turning or driving straight, and avoiding rear wheel 32 suspension or slippage due to uneven road surfaces. This is especially suitable for scenarios with high requirements for driving smoothness, such as shopping malls and workshops.

[0029] Furthermore, the rubber shock absorber 50 includes an integrally connected main body 51 and mounting post 52. The main body 51 is connected to the frame 10, and the mounting post 52 is used to connect to the mounting bracket 11. The main body 51 is made of rubber, and the mounting post 52 is made of metal.

[0030] Specifically, in this embodiment, the main body 51 is made of rubber, utilizing its high elasticity and fatigue resistance to perform shock absorption and cushioning functions. The mounting post 52 is made of metal (such as steel or aluminum alloy), utilizing its high strength and rigidity to perform fixed connection and force transmission functions. The material properties and functional requirements of the two are precisely matched, forming a functional division of shock absorption and connection. The rubber shock absorber 50 is connected to the frame 10 through two points: the main body 51 and the mounting post 52, and the mounting bracket 11. It connects the frame 10 and the mounting bracket 11. With the help of the L-shaped mounting bracket 11, a complete mechanical transmission link is formed: "frame 10 → rubber shock absorber 50 (main body 51 + mounting post 52) ​​→ L-shaped mounting bracket 11 → rear wheel 32". This ensures that the vibration and load borne by the rear wheel 32 are transmitted to the main body 51 through the mounting post 52, and then transmitted to the frame 10 after being cushioned by the elastic deformation of the rubber. The rubber damper 50 is the core damping component of the rear wheel 32 driven support unit. Together with the mounting bracket 11 and the rear wheel 32, it forms a sub-module of "elastic support - driven movement," adapting to the overall layout of the vehicle with "single front wheel 31 drive and steering + dual rear wheel 32 driven movement." It works in synergy with the drive and steering structure of the front wheel 31 to ensure the stability of the vehicle's walking system. The integrated rubber and metal structure reduces the connection gap, allowing the vibration and load of the rear wheel 32 to be directly and evenly transmitted to the main body 51, avoiding force transmission loss or local stress concentration caused by separate connections. At the same time, the rubber material can absorb vibration energy, reduce the noise generated by vibration, and improve the quietness of the vehicle during operation, making it suitable for noise-sensitive scenarios such as shopping malls and hospitals.

[0031] It should be noted that the integral connection in this embodiment can be achieved by injection molding, where the mounting post 52 is pre-placed in the mold, and then the main body 51 is injection molded. The mounting post 52 can be a bolt, with the bolt head located inside the main body 51 and the bolt shank extending out from the main body 51.

[0032] Furthermore, the main body 51 includes an integrally formed first mounting part 511, a second mounting part 512, and a connecting block part 513 connecting the first mounting part 511 and the second mounting part 512. Both the first mounting part 511 and the second mounting part 512 are U-shaped, and their U-shaped openings are arranged opposite to each other. The size of the U-shaped opening of the second mounting part 512 is smaller than the size of the opening of the second mounting part 512.

[0033] Specifically, in this embodiment, the main body 51 is integrally molded from rubber material and includes a first mounting part 511, a second mounting part 512, and a connecting block part 513 connecting the two. Both the first mounting part 511 and the second mounting part 512 are U-shaped structures, and their U-shaped openings are arranged opposite each other (i.e., the opening directions are opposite, forming an embracing layout). The key dimensional difference is that the U-shaped opening size (including opening width and depth) of the second mounting part 512 is smaller than that of the first mounting part 511, forming a nested U-shaped structure. The bottom wall of the first mounting part 511 is a fixed contact surface with the frame 10 and is fixed to the frame 10 by bolts; the bottom wall of the second mounting part 512 is a fixed contact surface with the mounting bracket 11 (the horizontal wall of the L-shaped mounting bracket 11), used to form a stable connection with the mounting bracket 11, and the bottom walls of the two are parallel.

[0034] The bottom wall of the first mounting part 511 is directly attached to the frame 10, and the bottom wall of the second mounting part 512 is attached to the horizontal wall of the mounting bracket 11, forming a vertical force transmission link: frame 10 → bottom wall of the first mounting part 511 → main body 51 → bottom wall of the second mounting part 512 → mounting bracket 11. The planar contact design of the bottom wall ensures the stability of the fixation, and the parallel arrangement of the two bottom walls makes the force transmission more even. The U-shaped structure of the first mounting part 511 and the second mounting part 512 forms a lateral wrap around the bottom wall. The bottom wall, as the core fixing surface, provides the load-bearing foundation, while the two side walls of the U-shape help to disperse the stress at the fixing point, avoiding local deformation or detachment of the bottom wall due to excessive stress at a single point. At the same time, the elastic characteristics of the U-shaped structure do not affect the fixation stability of the bottom wall. The elastic characteristics of the U-shaped structure provide deformation space for vibration buffering, while the rigid fixation of the bottom wall ensures the stability of the connection. The two form a synergistic effect of "rigid fixation + elastic buffering". The bottom wall ensures that the main body 51 does not detach from the frame 10 and the mounting bracket 11, and the U-shaped side walls and connecting block 513 absorb vibration energy through deformation.

[0035] Furthermore, the rubber damping component 50 also includes a positioning post 53, which penetrates the horizontal wall.

[0036] Specifically, in this embodiment, the positioning post 53 and the mounting post 52 are arranged parallel and spaced apart. The positioning post 53 penetrates the horizontal wall of the L-shaped mounting bracket 11 and can serve as a positioning reference. With the installation post 52 and the positioning post 53, there is no need for manual repeated adjustments to the front-back and left-right posture of the mounting bracket 11 to find the alignment reference, effectively avoiding the misalignment problem that easily occurs when relying solely on the mounting post 52 for connection. This is especially suitable for blind assembly operations in confined installation spaces, significantly reducing the operational difficulty for assembly personnel. Simultaneously, based on the connection between the rubber shock absorber 50 and the mounting bracket 11, a vertical positioning constraint is added, forming a two-point positioning structure together with the mounting post 52 (metal material) (the mounting post 52 bears the main connecting force, and the positioning post 53 assists in limiting horizontal offset). Furthermore, during assembly… Furthermore, the electric sweeper also includes a drive steering assembly 60 mounted on the front end of the frame 10, with the front wheel 31 mounted on the drive steering assembly 60; the drive steering assembly 60 is used to drive the front wheel 31 to rotate and steer.

[0037] Specifically, the drive steering assembly 60 serves as the mounting carrier for the front wheels 31, connecting to the front end of the frame 10 via bolts and other fasteners, and is stably fixed using the load-bearing capacity of the frame 10. It possesses dual output capabilities: on one hand, it drives the front wheels 31 to rotate, achieving vehicle movement (driving function); on the other hand, it drives the front wheels 31 to deflect, achieving vehicle steering (steering function). The drive steering assembly 60 is electrically connected to the central control module, receiving driving speed and steering angle commands from the central control module, precisely executing drive power adjustment and steering angle control, and dynamically adapting its output based on battery status feedback from the BMS, integrating into the vehicle's closed-loop control system. The drive steering assembly 60 integrates drive and steering functions, reducing the number of parts and installation space required, resulting in a more compact front-end layout of the frame 10. This not only meets the design requirements of the narrow body of the electric sweeper but also reduces the assembly gaps between components, improving the overall integration and stability of the vehicle structure.

[0038] The drive steering assembly 60 includes a drive motor 61, a steering motor 62, a mounting plate 63, a drive gear 64, a driven gear 65, and a connector 66. The mounting plate 63 is connected to the frame 10. The drive motor 61 and steering motor 62 are mounted on one side of the upper surface of the mounting plate 63. The drive gear 64, driven gear 65, connector 66, and front wheel 31 are located on one side of the lower surface of the mounting plate 63. The output shaft of the drive motor 61 extends through the mounting plate 63 to the front wheel 31. The driven gear 65 is fixedly mounted on the upper end of the connector 66, and the front wheel 31 is mounted on the lower end of the connector 66. A transmission assembly is also provided inside the connector 66. The drive motor 61 is connected to the front wheel 31 via the transmission assembly to drive the front wheel 31 to rotate, providing power for the sweeper's movement. The output shaft of the steering motor 62 also passes through the mounting plate 63 and is connected to the drive gear. The drive gear 64 meshes with the driven gear 65. The steering motor 62 drives the drive gear 64 to rotate, which in turn drives the driven gear 65, the connecting piece 66, and the front wheel 31 to perform steering actions. The mounting plate 63 employs a layered design, with the drive motor 61, steering motor 62 (power source), gear transmission, and connecting piece 66 (actuator) positioned on opposite sides of the mounting plate 63. This avoids excessive lateral space occupation by components, significantly reducing the overall size of the assembly. This compact layout perfectly suits the narrow body and low footprint design requirements of electric sweepers, reserving more space for the front of the frame 10 and indirectly optimizing the installation layout of the battery pack 20 and sweeping mechanism 40, thus improving the overall space integration of the vehicle. The drive motor 61 and steering motor 62 each perform their respective functions, achieving driving and steering functions through independent transmission paths. This ensures both the stability of power output (drive motor 61 focuses on providing driving torque) and the accuracy of the steering angle (gear meshing transmission has no backlash, resulting in minimal steering error). Meanwhile, both can be coordinated through a central control module (such as synchronously adjusting drive power during steering) to avoid interference and improve the coordination between driving and steering, making it particularly suitable for precise handling in confined spaces. The drive side achieves direct power transmission through the transmission components built into the connector 66, reducing power transmission loss. The steering side uses a drive gear 64-driven gear 65 meshing transmission, which offers higher transmission efficiency and faster response compared to traditional linkage steering mechanisms. Furthermore, the rigid structure of the gear transmission can withstand greater lateral forces, preventing increased steering clearance or decreased precision due to long-term operation. Simultaneously, both the built-in transmission components and the gear meshing structure are encased by the mounting plate 63 or connector 66, reducing dust and sewage corrosion and improving component durability.

[0039] In this embodiment, the front end of the frame 10 has a bracket 13, a base 14, a top seat 15, a sliding rod 16, and an elastic element 17. The base 14 and the top seat 15 are both mounted on the bracket 13 and are arranged vertically opposite each other. One end of the sliding rod 16 is connected to the base 14, and the other end is connected to the base 14. The elastic element 17 is sleeved on the sliding rod 16, and the mounting plate 63 is sleeved on the sliding rod 16. One end of the elastic element 17 abuts against the top seat 15 and the mounting plate 63. The combined structure of the elastic element 17 and the sliding rod 16 can effectively absorb the motor vibration (such as the vibration generated by the high-speed operation of the drive motor 61 and the gear meshing of the steering motor 62) when the drive steering assembly 60 is working, as well as the impact load transmitted by road bumps.

[0040] Furthermore, the electric sweeper also includes a wind box 70, a blower 71, and a garbage storage chamber 80 mounted on the frame 10; the garbage storage chamber 80 is located directly below the wind box 70 and behind the main brush assembly 42; the blower 71 is mounted on the wind box 70 to create negative pressure in the garbage storage chamber 80 to receive the garbage swept by the main brush assembly 42.

[0041] Specifically, in this embodiment, the air box 70, the blower 71, and the waste storage chamber 80 are all fixedly installed on the frame 10. The frame 10 provides a stable bearing reference for the three components, ensuring a relatively fixed spatial position and guaranteeing the stability of the negative pressure adsorption path. After the blower 71 is installed in the air box 70, it generates directional airflow through the internal channel of the air box 70 when it starts, creating negative pressure in the waste storage chamber 80 directly below the air box 70. The front end of the waste storage chamber 80 corresponds to the rear of the main brush assembly 42. Under the action of negative pressure suction, the waste swept by the main brush assembly 42 is sucked into the storage chamber along the channel between the main brush assembly 42 and the waste storage chamber 80, forming a continuous chain of sweeping-adsorption-storage. The negative pressure adsorption system and the cleaning mechanism 40 (side brush assembly 41 + main brush assembly 42) work together. The side brush assembly 41 gathers the garbage on both sides to the area of ​​the main brush assembly 42, and the main brush assembly 42 pushes the garbage backward. At the same time, the negative pressure adsorption system generates suction to accelerate the garbage into the storage chamber and prevent the garbage from scattering again.

[0042] Furthermore, the garbage storage compartment 80 is located at the rear end of the frame 10, and the garbage storage compartment 80 is removably connected to the frame 10.

[0043] Specifically, the waste storage chamber 80 is located at the rear of the chassis 10, forming a front-middle-rear functional zoning layout with the front-end walking mechanism 30 and the middle battery pack 20. This layout avoids the installation space of core power components while maintaining a continuous functional link of sweeping-adsorption-storage with the main brush assembly 42 and air box 70, ensuring that waste adsorbed by negative pressure can be directly transported to the rear storage chamber. The waste storage chamber 80, positioned at the rear of the chassis 10, forms a balanced weight distribution with the middle battery pack 20, preventing excessive forward or backward shift of the vehicle's center of gravity. Especially during waste storage, as the weight of the waste increases, the rear weight distribution can balance with the front drive steering assembly 60, reducing center of gravity shift during steering and improving driving and operational stability. The retractable connection allows waste disposal without disassembling any parts; simply pulling the storage chamber outward in the retractable direction completes the waste disposal, reducing manual labor intensity.

[0044] Furthermore, the electric sweeper also includes a mounting bracket 12, which extends from the front end of the frame 10 and is used to mount functional modules.

[0045] Specifically, in this embodiment, the mounting bracket 12 is a rigid support structure (material can be metal profile or high-strength plastic), extending forward along the front end of the frame 10 to form an extended mounting carrier independent of the core operating components (drive steering assembly 60, sweeping mechanism 40). The core function of the bracket 13 is to provide a dedicated mounting reference for external functional modules, which include intelligent sensing components such as radar (e.g., lidar, millimeter-wave radar) and sensors (e.g., distance sensors, vision sensors, obstacle avoidance sensors). The mounting bracket 12 extends the functional modules to the front end of the frame 10, allowing the radar and sensors to obtain an unobstructed forward detection field of view, avoiding obstruction by components such as the side brush assembly 41 and the front wheel 31, and enabling accurate capture of environmental information such as obstacles ahead and work boundaries. The forward-extending structure of the bracket 13 places the functional modules in a relatively independent space, preventing dust and wastewater generated during sweeping operations from directly corroding the module body; at the same time, the rigid structure of the bracket 13 can buffer vibration and impact during driving, reducing the impact of road bumps on precision sensors.

[0046] Furthermore, the electric sweeper also includes a spray dust suppression module 90, which includes a water tank 91, a water pump 92, and an atomizing nozzle 93. The water tank 91 is installed at the front end of the frame 10, the water pump 92 is installed on the frame 10 and is located on one side of the air box 70, and the atomizing nozzle 93 is connected to the frame 10 and is positioned in front of the side brush assembly 41.

[0047] Specifically, in this embodiment, the water tank 91, water pump 92, and atomizing nozzle 93 are all mounted on the frame 10 by bolts or a fixing structure to ensure that they do not shift during operation. The three are connected by a pressure-resistant water pipe, forming a closed water supply path of "water tank 91 → water pump 92 → atomizing nozzle 93". The water pump 92 draws water from the water tank 91 through the pipeline, pressurizes it, and delivers it to the nozzle for atomized spraying. The atomizing nozzle 93 faces the front of the side brush assembly 41, allowing the water mist to pre-cover the area to be cleaned by the side brush. When the side brush rotates, it mixes the ground debris with the water mist, preventing debris from being stirred up and generating dust, forming a coordinated operation process of "spraying pre-dust suppression → side brush cleaning → main brush collection". The precise spatial matching of the two ensures seamless connection between dust suppression and cleaning. The water tank 91 is installed at the front of the frame 10, utilizing the unused space at the front (without occupying the installation area of ​​the mid-section battery pack 20 and the rear garbage storage chamber 80); the water pump 92 is arranged on one side of the air box 70, achieving compact installation by utilizing the gaps around the air box 70. The overall layout does not increase the lateral width of the vehicle, adapting to the requirements of narrow body design, and at the same time, there is no spatial interference with components such as the drive mechanism.

[0048] The atomizing nozzle 93 sprays water mist in advance towards the side brush, which moistens and clumps the dust on the ground, preventing it from being stirred up when the side brush rotates, thus solving the problem of dust pollution in traditional sweepers. The water pump 92 is linked to the central control module, which can dynamically adjust the spray volume according to the working conditions (such as increasing the spray volume during high-speed sweeping and decreasing the spray volume during low-speed edge sweeping), avoiding water waste caused by "continuous full-load spraying"; when the water level in the water tank 91 is too low, the central control module can automatically reduce the spray volume or stop spraying, while reminding you to add water, thus balancing dust suppression effect and resource conservation.

[0049] 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. An electric sweeper, characterized in that, include: Frame; A battery pack is mounted in the middle of the vehicle frame and is equipped with a battery management system (BMS) that estimates the state of charge (SOC) and state of equilibrium (SOH) in real time. The walking mechanism is mounted below the vehicle frame and includes one front wheel and two rear wheels. The front wheel is the driving and steering drive wheel, and the two rear wheels are driven wheels. The front wheel is located at the middle of the front end of the vehicle frame, and the rear wheels are located at the rear end of the vehicle frame to reduce the turning radius. A cleaning mechanism is installed under the vehicle frame and includes two side brush assemblies and one main brush assembly. The two side brush assemblies are located on both sides of the front wheel, and the main brush assembly is located at the rear end of the side brush assemblies. The central control module is mounted on the vehicle frame and electrically connected to the battery pack, drive mechanism, and sweeping mechanism. The central control module is configured to form a closed-loop control via the CAN bus, and adjust the power distribution of each part according to the working conditions and the power data fed back by the BMS battery management system. When the SOC is less than the threshold or the single cell voltage difference exceeds the threshold, the power of the walking motor is limited.

2. The electric sweeper as described in claim 1, characterized in that, The electric sweeper also includes a mounting bracket connected to the rear wheel and a rubber shock absorber. The mounting bracket is L-shaped and includes a horizontal wall and a vertical wall. The upper end of the rubber shock absorber is fixedly connected to the frame, and the lower end of the rubber shock absorber is fixedly connected to the horizontal wall. The rear wheel is rotatably connected to the vertical wall.

3. The electric sweeper as described in claim 2, characterized in that, The rubber shock absorber includes an integrally connected main body and a mounting post. The main body is connected to the vehicle frame, and the mounting post is used to connect to the mounting bracket. The main body is made of rubber, and the mounting post is made of metal.

4. The electric sweeper as described in claim 3, characterized in that, The main body includes an integrally formed first mounting part, a second mounting part, and a connecting block part connecting the first mounting part and the second mounting part. Both the first mounting part and the second mounting part are U-shaped, and their U-shaped openings are arranged opposite to each other. The U-shaped opening size of the second mounting part is smaller than the U-shaped opening size of the first mounting part.

5. The electric sweeper as described in claim 3, characterized in that, The rubber shock absorber also includes a positioning post, which penetrates the horizontal wall.

6. The electric sweeper as described in claim 1, characterized in that, The electric sweeper also includes a drive steering assembly installed at the front end of the frame, and the front wheels are mounted on the drive steering assembly; the drive steering assembly is electrically connected to the central control module and is used to drive the front wheels to rotate and steer.

7. The electric sweeper as described in claim 4, characterized in that, The electric sweeper also includes a wind box, a blower, and a garbage storage chamber mounted on the vehicle frame; the garbage storage chamber is located directly below the wind box and behind the main brush assembly; the blower is mounted on the wind box and is used to create negative pressure in the garbage storage chamber to receive the garbage swept by the main brush assembly.

8. The electric sweeper as described in claim 1, characterized in that, The electric sweeper also includes a mounting bracket that extends from the front end of the frame and is used to mount functional modules.

9. The electric sweeper as described in claim 7, characterized in that, The waste storage compartment is located at the rear end of the vehicle frame, and the waste storage compartment is removably connected to the vehicle frame.

10. The electric sweeper as described in claim 7, characterized in that, The electric sweeper also includes a dust suppression spray module, which includes a water tank, a water pump, and atomizing nozzles. The water tank is installed at the front end of the vehicle frame, the water pump is installed on the vehicle frame and located on one side of the air box, and the atomizing nozzles are connected to the vehicle frame and positioned in front of the side brush assembly.

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