An electric cleaning brush structure

Abstract

The utility model discloses a kind of electric cleaning brush structure;The electric cleaning brush structure includes: host computer and brush head, the host computer is equipped with output shaft, the output shaft is transversely connected with transmission shaft, to make the output shaft with the transmission shaft form cross cross shape, the brush head is equipped with the assembly groove corresponding to the output shaft and the transmission shaft.The utility model forms cross cross structure by transmission shaft transversely connecting output shaft, makes motor torque directly act on brush head by transmission shaft, reduces the intermediate loss of long shaft transmission in traditional structure, so that more motor torsion can be transmitted to brush head, to effectively improve the torsion of brush head.

Description

Technical Field

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

[0002] Electric cleaning brushes, as an important component of modern cleaning tools, are widely used for surface cleaning tasks in homes, businesses, and industries, such as floors, glass, furniture, and automotive interiors. Their core advantage lies in replacing traditional manual operation with electric power, significantly improving cleaning efficiency and reducing labor intensity. As consumers' demands for cleaning effectiveness and ease of use continue to increase, technological advancements in electric cleaning brushes focus on improving power output, extending battery life, and optimizing the human-computer interaction experience.

[0003] Most mainstream electric cleaning brushes on the market currently adopt a direct drive structure of "motor-output shaft-brush head". Its working principle is as follows: the motor transmits rotational power directly to the brush head through a rigid output shaft, driving the brush head to complete the cleaning action. However, this design has the following technical bottlenecks:

[0004] As a single transmission component, the output shaft must simultaneously bear the responsibility of torque transmission and radial load. When cleaning high-resistance surfaces (such as stubborn stains and rough materials), the output shaft is prone to torque loss due to its rigid connection, resulting in a significant reduction in the effective torque actually applied to the brush head.

[0005] To address the above issues, the industry has attempted to optimize the process in the following ways:

[0006] Increasing motor power: While it can increase theoretical torque, it leads to larger product size and higher energy consumption, which goes against the trend of portability.

[0007] Due to the systemic defects of existing technologies, there is an urgent need for a new type of transmission structure that can achieve efficient torque transmission without significantly increasing product complexity and cost. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide an electric cleaning brush structure.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0010] This utility model provides an electric cleaning brush structure, including: a main unit and a brush head. The main unit is provided with an output shaft, and the output shaft is laterally connected to a transmission shaft so that the output shaft and the transmission shaft form a cross shape. The brush head is provided with an assembly groove corresponding to the output shaft and the transmission shaft.

[0011] In one specific embodiment, the output shaft is connected to a docking member, and the brush head is connected to the docking member.

[0012] In one specific embodiment, the docking member is provided with a first magnet, and the brush head is provided with a second magnet corresponding to the first magnet.

[0013] In one specific embodiment, the output shaft is a double-sided flattened shaft, and the mating member is snapped onto the output shaft.

[0014] In one specific embodiment, the docking component is disc-shaped.

[0015] In one specific embodiment, the number of the first magnets is at least two.

[0016] In one specific embodiment, there are two first magnets, which are located on opposite sides of the output shaft.

[0017] In one specific embodiment, the first magnet is interference-fitted to the mating member.

[0018] In one specific embodiment, the brush head is provided with a protrusion, and the protrusion is provided with the mounting groove and the second magnet.

[0019] In one specific embodiment, the host is equipped with a brushless motor, and the brushless motor is equipped with the output shaft.

[0020] The beneficial effects of the electric cleaning brush structure of this utility model compared with the prior art are: by connecting the output shaft laterally through the transmission shaft to form a cross structure, the motor torque is directly applied to the brush head through the transmission shaft, which reduces the intermediate loss of long shaft transmission in the traditional structure, and allows more motor torque to be transmitted to the brush head, thereby effectively improving the torque of the brush head.

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 these drawings without creative effort.

[0023] Figure 1 A three-dimensional schematic diagram of the electric cleaning brush structure provided by this utility model;

[0024] Figure 2 This is a cross-sectional schematic diagram of the electric cleaning brush structure provided by this utility model;

[0025] Figure 3 An exploded view of the structure of the electric cleaning brush provided by this utility model;

[0026] Figure 4 A schematic diagram of the structure of the host provided by this utility model;

[0027] Figure 5 A schematic diagram of the structure of the brush head provided by this utility model.

[0028] Figure label:

[0029] Main unit 10, output shaft 11, transmission shaft 12, docking part 13, first magnet 14, brush head 20, assembly slot 21, second magnet 22, protrusion 23. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0037] See Figures 1 to 5 As shown, this utility model discloses a specific embodiment of an electric cleaning brush structure, including: a main unit 10 and a brush head 20. The main unit 10 is provided with an output shaft 11, and the output shaft 11 is laterally connected to a transmission shaft 12 so that the output shaft 11 and the transmission shaft 12 form a cross shape. The brush head 20 is provided with an assembly groove 21 corresponding to the output shaft 11 and the transmission shaft 12.

[0038] Specifically, a motor is installed inside the main unit 10, generating rotational power when the motor operates. The motor is connected to an output shaft 11, with one end of the output shaft 11 connected to the motor and the other end protruding from the housing of the main unit 10 as the power output end. Additionally, a transmission shaft 12 is connected laterally to the output shaft 11, forming a cross shape. This connection can be achieved by setting corresponding connection structures on the output shaft 11 and the transmission shaft 12. For example, a transverse through hole can be opened on the output shaft 11, through which the transmission shaft 12 can be passed, and secured using keys, pins, or other connecting parts. This ensures that the transmission shaft 12 rotates synchronously with the output shaft 11, while maintaining a stable connection in the cross shape, preventing relative slippage or separation.

[0039] A mounting groove 21 is provided at a corresponding position on the brush head 20. The shape and size of the mounting groove 21 match the output shaft 11 and the drive shaft 12. Specifically, the mounting groove 21 must be able to accommodate the ends of the output shaft 11 and the drive shaft 12. For example, the mounting groove 21 can be designed as two mutually perpendicular slots, one corresponding to the output shaft 11 and the other to the drive shaft 12. When the brush head 20 is installed on the main unit 10, the ends of the output shaft 11 and the drive shaft 12 are inserted into their respective slots, thus connecting the brush head 20 to the main unit 10. When the motor inside the main unit 10 is started, the motor drives the output shaft 11 to rotate. Since the output shaft 11 and the drive shaft 12 are cross-connected, the rotational motion of the output shaft 11 is transmitted to the drive shaft 12, causing the drive shaft 12 to rotate synchronously. The drive shaft 12 acts directly on the mounting groove 21 of the brush head 20, directly transmitting the torque of the motor to the brush head 20, driving the brush head 20 to rotate, thereby achieving the cleaning function.

[0040] In other words, by connecting the output shaft 11 laterally to the drive shaft 12 to form a cross structure, the motor torque is directly applied to the brush head 20 through the drive shaft 12. This reduces the intermediate losses in the long shaft transmission of traditional structures, allowing more motor torque to be transmitted to the brush head 20, thus effectively increasing the torque of the brush head 20. Furthermore, the increased torque of the brush head 20 directly enhances its cleaning ability. During cleaning, the higher torque allows the brush head 20 to more effectively remove stains, dust, and other adhering substances. For example, when cleaning stubborn stains, the high-torque brush head 20 can clean the surface more deeply, peeling the stains off the object's surface. Compared to traditional cleaning brushes with lower torque, this achieves better cleaning results, improving cleaning efficiency and quality.

[0041] See Figures 2 to 5 As shown, in one embodiment, the output shaft 11 is connected to a docking member 13, and the brush head 20 is connected to the docking member 13.

[0042] Specifically, the end of the output shaft 11 is specially designed, for example, by machining a cylindrical structure with a keyway. The mating piece 13 is designed as a sleeve shape that matches the end of the output shaft 11, and the inner wall of the sleeve is also machined with a corresponding keyway. The mating piece 13 is fitted onto the end of the output shaft 11, aligning the keyways, and then a flat key is inserted. The flat key is embedded in the keyways of the output shaft 11 and the mating piece 13, serving to fix and transmit torque, ensuring that the mating piece 13 can rotate synchronously with the output shaft 11. To prevent the flat key from loosening, a retaining ring can be installed at one end of the key for limiting its movement. In addition, after the mating piece 13 is installed on the output shaft 11, its position is below the drive shaft 12.

[0043] The docking component 13 is designed with a quick-connect interface, such as an elastic snap-fit ​​structure. Two symmetrical elastic snaps are located on the side of the docking component 13, with one end fixed to the docking component 13 and the other end being a free end with an inwardly curved hook. The connecting part of the brush head 20 is designed with a groove that matches the hook. To install the brush head 20, align the connecting part of the brush head 20 with the docking component 13 and push the brush head 20 towards the docking component 13. During this pushing process, the brush head 20 will compress the elastic snaps, causing them to open outwards. When the groove of the brush head 20 reaches the snap position, the snaps return to their original position under their own elasticity, and the hook engages in the groove, thus fixing the brush head 20 to the docking component 13. To remove the brush head 20, simply pull it outwards.

[0044] In other words, users can quickly change brush heads 20 during cleaning. For example, when switching from cleaning floors to cleaning furniture surfaces, no tools are needed; a simple push-pull operation can replace the brush head 20 in seconds, greatly saving time and improving cleaning efficiency. If the brush head 20 becomes worn or needs cleaning, users can quickly remove it for maintenance. Similarly, installing a new brush head 20 can be done quickly, reducing downtime for maintenance and ensuring continuous availability of the cleaning product. Furthermore, the design of the docking part 13 located below the drive shaft 12 avoids interference between components, contributing to the miniaturization and compact design of the main unit 10. Additionally, users can flexibly change to different types of brush heads 20 according to different cleaning scenarios and needs. For example, a stiff-bristled brush head 20 can be used to clean stubborn stains, while a soft-bristled brush head 20 can be used to clean fragile surfaces. The quick-release structure makes this flexible replacement of the brush head 20 more convenient, meeting diverse cleaning needs.

[0045] See Figures 2 to 5 As shown, in one embodiment, the docking member 13 is provided with a first magnet 14, and the brush head 20 is provided with a second magnet 22 corresponding to the first magnet 14.

[0046] Specifically, the connector 13 is typically made of a material with sufficient strength and durability, such as plastic or metal. Its shape is determined by the overall design of the electric cleaning brush and the connection requirements of the brush head 20; common shapes include cylindrical and square. Mounting holes for the first magnet 14 are pre-drilled on the connector 13. The size and shape of the mounting holes match the first magnet 14 to ensure that the first magnet 14 can be securely mounted on the connector 13. A first magnet 14 of suitable specifications and magnetism is selected and placed into the mounting hole of the connector 13. Adhesive can be used for fixing, ensuring that the first magnet 14 will not loosen or fall off during use of the connector 13. The selection of adhesive should consider factors such as its bonding strength, temperature resistance, and corrosion resistance to ensure that the first magnet 14 can be stably fixed in various operating environments. For example, in some high-temperature cleaning scenarios, an adhesive capable of withstanding high temperatures needs to be selected.

[0047] The material and structure of the brush head 20 vary depending on the object being cleaned; for example, the bristles can be made of nylon, boar bristles, etc. A mounting hole for the second magnet 22 is designed at the connection point of the brush head 20. The position of the mounting hole corresponds to the position of the first magnet 14 on the docking part 13 to ensure accurate magnetic attraction. The second magnet 22, which is magnetically attracted to the first magnet 14, is installed into the mounting hole of the brush head 20. The installation method is similar to that of the first magnet 14; it can be fixed with glue or by other methods such as clips. If clips are used, corresponding clip structures need to be designed on the mounting hole and the second magnet 22 to ensure a secure installation. When the brush head 20 needs to be installed on the main unit 10, simply bring the brush head 20 close to the docking part 13. Due to the magnetic force between the first magnet 14 and the second magnet 22, the brush head 20 will automatically be attracted to the docking part 13. As the distance between the brush head 20 and the mating part 13 gradually decreases, the magnetic force continuously increases, eventually causing the brush head 20 to adhere tightly to the mating part 13, completing the rapid assembly. When it is necessary to disassemble the brush head 20, a certain external force is applied to overcome the magnetic force between the first magnet 14 and the second magnet 22, and the brush head 20 can be removed from the mating part 13. The magnitude of this external force depends on factors such as the magnetism of the magnets and the adsorption area between the brush head 20 and the mating part 13.

[0048] In other words, the magnetic quick-release structure makes the assembly and disassembly of the brush head 20 extremely rapid. Users do not need tools or complex operations; they can simply bring the brush head 20 close to or pull it away from the connector 13 to complete the installation and disassembly. This significantly saves time and improves cleaning efficiency. For example, when cleaning large areas, users can quickly change to different types of brush heads 20 to meet different cleaning needs without affecting the overall cleaning progress due to time-consuming brush head replacements. For electric cleaning brushes that require regular cleaning or replacement of the brush head 20, the magnetic quick-release structure makes maintenance easier. Users can remove the brush head 20 at any time for cleaning or replacement without professional assistance, reducing maintenance costs and difficulty. Furthermore, the relatively uniform magnetic force distribution of the magnets ensures even force distribution between the brush head 20 and the connector 13. Compared to traditional mechanical connections, magnetic connections avoid loosening or damage caused by excessive localized force. For example, when the electric cleaning brush rotates at high speed, the magnetic connection can better maintain a stable connection between the brush head 20 and the docking part 13, reducing the shaking and deviation of the brush head 20 and improving the cleaning effect. The magnetic force of the magnet has the characteristic of automatic alignment. When the brush head 20 approaches the docking part 13, the magnetic force will guide the brush head 20 to automatically adjust to the correct position, ensuring that the brush head 20 and the docking part 13 are accurately connected. This reduces the risk of failure due to inaccurate connection and improves the reliability and stability of the product.

[0049] See Figures 2 to 3 As shown, in one embodiment, the output shaft 11 is a double-sided flattened shaft, and the docking member 13 is snapped onto the output shaft 11.

[0050] Specifically, using a CNC milling machine, the width, length, and symmetry of the cut surfaces relative to the axis centerline are precisely set for machining, resulting in two parallel and symmetrical cut surfaces on the output shaft 11. Based on the dimensions and shape of the double-sided cut surfaces of the output shaft 11, a snap-fit ​​structure for the mating part 13 is designed. A groove matching the cut surfaces of the output shaft 11 is machined on the mating part 13. The width and depth of the groove must be adapted to the dimensions of the cut surfaces to ensure that the output shaft 11 can smoothly and securely engage with the groove. Simultaneously, a stepped structure is designed on the mating part 13 for positioning and assembly with the output shaft 11. Magnet mounting holes are pre-designed on the mating part 13. The number, position, and size of the holes are determined according to the magnet specifications and magnetic force requirements. For example, when using two magnets for magnetic connection, two circular magnet mounting holes are designed symmetrically on the mating part 13. The diameter of the holes must match the outer diameter of the magnets, and the depth of the holes must ensure a stable installation of the magnets.

[0051] Additionally, align the slot of the docking piece 13 with the double-sided flattened portion of the output shaft 11 and slowly insert it. During insertion, the flattened surface of the output shaft 11 fits tightly against the side of the slot, while one end of the output shaft 11 contacts the stepped surface of the docking piece 13, achieving axial and radial positioning of the output shaft 11 on the docking piece 13. This positioning and assembly method ensures accurate relative positioning between the output shaft 11 and the docking piece 13. Since the output shaft 11 is positioned and assembled through the flattened surface and the step, the orientation of the magnet holes on the docking piece 13 is also determined. When assembling the magnets, correctly install them into the magnet holes according to design requirements, ensuring that the magnetic poles of the magnets are aligned, thereby achieving accurate magnetic attraction between the brush head 20 and the docking piece 13. For example, ensure that the opposite magnetic poles of the two magnets are opposite to each other to generate sufficient magnetic attraction.

[0052] In other words, the double-sided flattened structure of the output shaft 11, in conjunction with the slot and step of the docking part 13, enables precise axial and radial positioning of the output shaft 11 on the docking part 13. This positioning method avoids the axial movement and radial offset problems that may occur in traditional assembly methods, improving the assembly accuracy of the output shaft 11 and the docking part 13, and ensuring the stability and reliability of the electric cleaning brush during operation. Furthermore, the positioning assembly of the output shaft 11 effectively controls the direction of the magnet holes on the docking part 13. This allows the magnets to be accurately placed according to design requirements during installation, ensuring the correct magnetic pole direction and generating a stable and reliable magnetic attraction. The brush head 20 and the docking part 13 can be tightly connected, preventing loosening or detachment due to insufficient magnetic attraction, thus improving the safety of the electric cleaning brush. In addition, the snap-fit ​​structure of the double-sided flattened shaft and the docking part 13, along with the step positioning assembly method, enhances the stability of the entire structure. During the use of the electric cleaning brush, it can resist various external forces, such as friction and vibration between the brush head 20 and the object being cleaned, ensuring that the connection between the output shaft 11 and the docking part 13 is firm and will not loosen or deform due to external forces.

[0053] See Figures 2 to 4 As shown, in one embodiment, the docking member 13 is disc-shaped.

[0054] Specifically, the disc-shaped connector 13 has good symmetry, enabling the force to be evenly distributed across the entire disc when transmitting power and bearing external forces. Compared to irregularly shaped connectors 13, this reduces stress concentration, lowers the risk of damage due to excessive localized stress, and improves structural stability and reliability. For example, when the electric cleaning brush rotates at high speed, the disc-shaped connector 13 can better withstand centrifugal force, ensuring a stable connection with the output shaft 11 and brush head 20. Furthermore, the regular shape of the disc-shaped connector 13 facilitates positioning and operation during installation. Whether assembling with the output shaft 11 or connecting with the brush head 20, alignment is quick and accurate, reducing installation time and difficulty. For example, when replacing the brush head 20, the user can easily align the brush head 20 with the disc-shaped connector 13 for installation or removal.

[0055] See Figures 3 to 5 As shown, in one embodiment, the number of the first magnet 14 is at least two.

[0056] Specifically, at least two first magnets 14 work together to provide a stronger magnetic attraction, making the connection between the brush head 20 and the mating part 13 more secure. During the operation of the electric cleaning brush, even if subjected to external forces such as friction between the brush head 20 and the object being cleaned, or vibration, the brush head 20 is less likely to detach, ensuring the continuity and stability of the cleaning process. Furthermore, the even distribution of multiple first magnets 14 ensures that the brush head 20 receives a uniform magnetic attraction, preventing deformation or damage due to excessive localized force. This uniform force also helps reduce wobbling and misalignment of the brush head 20 during operation, improving cleaning effectiveness. Additionally, the interaction of the magnetic forces of multiple magnets creates an automatic alignment effect. When the brush head 20 approaches the mating part 13, the magnetic force between the magnets guides the brush head 20 to automatically adjust to the correct position, ensuring accurate alignment and attraction between the first magnet 14 and the second magnet 22. This reduces assembly difficulty, improves assembly efficiency and precision, and allows even non-professionals to easily install and remove the brush head 20. Furthermore, the evenly distributed magnets can mutually restrain each other, reducing assembly errors caused by deviations in the installation position of a single magnet. During mass production, this ensures consistent assembly precision between the brush head 20 and the mating part 13 for each product, improving product quality stability.

[0057] See Figures 3 to 5 As shown, in one embodiment, there are two first magnets 14, which are located on both sides of the output shaft 11.

[0058] Specifically, two first magnets 14 are located on both sides of the output shaft 11, generating a balanced magnetic force that ensures the brush head 20 is uniformly attracted in all directions. This effectively prevents the brush head 20 from tilting, wobbling, or shifting due to uneven force, ensuring a more stable connection between the brush head 20 and the docking member 13. For example, when the electric cleaning brush rotates at high speed, the balanced magnetic force prevents the brush head 20 from detaching from the docking member 13 due to centrifugal force. During operation, the electric cleaning brush may be subject to various external forces, such as friction with the object being cleaned and vibration. The combined action of the two magnets provides a stronger magnetic force, enhancing the connection strength between the brush head 20 and the docking member 13, making the brush head 20 less prone to detachment when subjected to external forces, thus ensuring the continuity and stability of the cleaning process. Furthermore, the balanced magnetic force provided by the two magnets effectively reduces the vibration of the brush head 20 during operation. Reduced vibration not only lowers the noise generated by the electric cleaning brush and improves the user experience but also reduces wear on the brush head 20 and the docking member 13, extending the product's lifespan. In addition, the stable connection of the brush head 20 ensures that the brush head 20 maintains good contact with the cleaning surface at all times, thereby improving the cleaning effect. During the cleaning process, the brush head 20 will not jump or detach from the cleaning surface due to unstable connection, and can more effectively remove stains and dust.

[0059] In one embodiment, the first magnet 14 is interference-fitted to the docking member 13.

[0060] Specifically, the shape and size of the first magnet 14 are determined. Common shapes include cylindrical and square. For example, if the mating part 13 has a suitable cylindrical mounting hole, a cylindrical magnet can be selected. Its diameter and height should be determined based on the size of the mounting hole and the required magnetic attraction effect. The diameter of the mounting hole is determined based on the size of the first magnet 14. During interference fit, the diameter of the mounting hole should be smaller than the diameter of the magnet. The size of the interference will affect the ease of assembly and the connection strength. Typically, the interference is between 0.01-0.05 mm. For high precision requirements or small magnet sizes, a smaller interference value can be used; for large magnets or situations requiring extremely high connection strength, the interference can be appropriately increased. The depth of the mounting hole should be slightly greater than the height of the magnet to ensure that the magnet can be fully embedded in the mating part 13, while leaving sufficient space for adjustment and fixation.

[0061] In other words, the interference fit between the first magnet 14 and the mating part 13 generates significant friction, thus achieving a reliable mechanical connection. This connection method can withstand substantial external forces, such as vibrations and impacts generated during the operation of the electric cleaning brush, ensuring that the magnet will not easily detach and guaranteeing the stability of the connection between the brush head 20 and the mating part 13. Compared to clearance or transition fits, interference fits effectively prevent connection failure due to magnet loosening during use. Even with prolonged use or in harsh working environments, the connection between the magnet and the mating part 13 remains robust, improving product reliability and lifespan. Furthermore, interference fits eliminate the need for additional connecting parts such as screws and glue, simplifying the assembly process, reducing the number of parts, and thus lowering manufacturing costs. Simultaneously, the relatively simple assembly process eliminates the need for complex assembly equipment and tools, further reducing production input and maintenance costs.

[0062] See Figure 5 As shown, in one embodiment, the brush head 20 is provided with a protrusion 23, and the protrusion 23 is provided with the mounting groove 21 and the second magnet 22.

[0063] Specifically, when the brush head 20 is subjected to external force, the protrusion 23 can evenly transmit the force to the body of the brush head 20, avoiding localized stress concentration. For example, when the electric cleaning brush collides with a hard object, the protrusion 23 can effectively disperse the impact force, preventing the brush head 20 from breaking or deforming. In addition, the combined design of the protrusion 23, the mounting groove 21, and the second magnet 22 optimizes the stress distribution of the brush head 20 during operation. Because the protrusion 23 can evenly transmit the force to the body of the brush head 20, and the magnetic attraction provides additional constraint, the stress on the brush head 20 will not concentrate in a certain local area when repeatedly subjected to force, but will be evenly distributed throughout the brush head 20. This greatly reduces fatigue damage caused by stress concentration and extends the service life of the brush head 20.

[0064] In one embodiment, the second magnet 22 is interference-fitted to the protrusion 23.

[0065] Specifically, the interference fit creates a tight mechanical connection between the second magnet 22 and the protrusion 23. Because the protrusion 23 tightly encloses the second magnet 22, with almost no gap between them, it effectively prevents the second magnet 22 from loosening or falling off during operation. For example, when the electric cleaning brush rotates at high speed or is subjected to vibration, this tight fit ensures that the second magnet 22 remains stably fixed on the protrusion 23, ensuring the normal functioning of the magnetic attraction. Furthermore, the friction and mechanical interlocking force generated by the interference fit allow the second magnet 22 and the protrusion 23 to jointly withstand significant tensile, compressive, and torque forces. When the brush head 20 is assembled with the mating part 13, this connection method can withstand greater external forces, improving the overall stability and reliability of the brush head 20 structure. For example, when the electric cleaning brush needs to be disassembled and reassembled with the mating part 13, the interference fit ensures that the second magnet 22 will not be damaged or displaced due to external forces. In addition, the interference fit eliminates the need for additional connecting parts such as screws and glue, simplifying the assembly process, reducing the number of parts, and thus lowering manufacturing costs. At the same time, because the assembly process is relatively simple and does not require complex assembly equipment and tools, it also reduces production input and maintenance costs.

[0066] In one embodiment, the host 10 is provided with a brushless motor, and the brushless motor is provided with the output shaft 11.

[0067] Specifically, the power of the brushless motor is determined based on the working requirements of the electric cleaning brush, such as the size of the cleaning area and the stubbornness of the object being cleaned. For small areas and light cleaning tasks, a brushless motor with a power of 50-100W can be selected; while for large areas and heavy stains, a motor with a power of 200-500W or even higher is required. For example, a 50W brushless motor is sufficient for cleaning tabletop stains with a small household electric cleaning brush; a 300W or higher motor may be needed for cleaning oil stains on industrial floors with a large electric cleaning brush. The output shaft 11 is usually made of high-strength, wear-resistant metal materials, such as stainless steel or alloy steel. Stainless steel has good corrosion resistance and is suitable for electric cleaning brushes in humid environments; alloy steel has high strength and hardness and can withstand greater torque.

[0068] In other words, brushless motors feature high speed and high torque, providing powerful drive for the cleaning brush. High speed allows the brush to rotate rapidly, increasing the number of friction cycles between the brush and the surface being cleaned, thus improving cleaning speed. High torque ensures that the brush maintains sufficient rotational force even when encountering stubborn stains, effectively removing them. For example, when cleaning kitchen grease, the high speed and high torque of a brushless motor allow the brush to quickly remove the grease, significantly improving cleaning efficiency. Furthermore, brushless motors lack brushes and commutators, reducing mechanical friction and wear caused by electrical sparks, resulting in a longer lifespan. Compared to brushed motors, brushless motors can have a lifespan several times or even tens of times longer, reducing the frequency of motor repair and replacement during long-term use of electric cleaning brushes, thus lowering operating costs.

[0069] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. An electric cleaning brush structure, characterized in that, include: The main unit and the brush head are provided. The main unit is provided with an output shaft, and the output shaft is laterally connected to a drive shaft so that the output shaft and the drive shaft form a cross shape. The brush head is provided with a mounting groove corresponding to the output shaft and the drive shaft.

2. The electrically powered cleaning brush structure of claim 1, wherein The output shaft is connected to a connector, and the brush head is connected to the connector.

3. The electrically powered cleaning brush structure of claim 2, wherein, The docking component is provided with a first magnet, and the brush head is provided with a second magnet corresponding to the first magnet.

4. The electrically powered cleaning brush structure of claim 2, wherein, The output shaft is a double-sided flattened shaft, and the mating part is snapped onto the output shaft.

5. The electrically powered cleaning brush structure of claim 2, wherein, The docking component is disc-shaped.

6. The electrically powered cleaning brush structure of claim 3, wherein, The number of the first magnets is at least two.

7. The electrically powered cleaning brush structure of claim 6, wherein, The number of the first magnets is two, and they are located on both sides of the output shaft respectively.

8. The electrically powered cleaning brush structure of claim 3, wherein, The first magnet is interference-fitted to the mating part.

9. The electrically powered cleaning brush structure of claim 3, wherein, The brush head is provided with a protrusion, and the protrusion is provided with the mounting groove and the second magnet.

10. The electrically powered cleaning brush structure of claim 1, wherein, The host is equipped with a brushless motor, and the brushless motor is equipped with the output shaft.

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