Floor brush assembly and cleaning device

Abstract

The application provides a floor brush assembly and a cleaning equipment, and relates to the technical field of floor brush assemblies. The floor brush assembly comprises a base, a rolling brush and a motor module. The rolling brush is rotationally connected to the base. The motor module comprises a motor and a shell arranged outside the motor. The motor is used for driving connection with the rolling brush, and the motor is used for driving the rolling brush to rotate. The outer surface of the shell is formed with a first noise reduction structure. The first noise reduction structure comprises a plurality of recessed portions recessed towards the interior of the shell. The plurality of recessed portions are arranged at intervals on the outer surface of the shell. The floor brush assembly provided in the application can solve the problem of relatively large noise of the cleaning equipment during operation.

Description

Technical Field

[0001] This application relates to the field of floor brush component technology, and more particularly to a floor brush component and cleaning equipment. Background Technology

[0002] A floor scrubber is a cleaning device that integrates cleaning and drying functions, and is widely used in homes and commercial spaces (such as shopping malls and office buildings). Its core function is to use a rotating roller brush to bring cleaning fluid into contact with the floor, while simultaneously using a scraper to squeeze wastewater out of the roller brush. Finally, the wastewater is recycled by the suction of the fan on the main unit.

[0003] However, floor scrubbers generate considerable noise during operation, resulting in a poor user experience. Existing solutions mostly focus on noise reduction of the main unit. While noise reduction efforts for the main unit have been extensive and its noise level is now well controlled, solutions for floor brush noise are still lacking and require further research and optimization. Utility Model Content

[0004] This application provides a floor brush assembly and a cleaning device to solve the problem of excessive noise during operation of the floor brush assembly in the aforementioned related technologies.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] A first aspect of this application provides a floor brush component, including:

[0007] Base;

[0008] The roller brush is rotatably connected to the base;

[0009] The motor module includes a motor and a housing fitted over the outside of the motor. The motor is used to connect to the roller brush drive and to drive the roller brush to rotate.

[0010] The outer surface of the housing has a first noise reduction structure, which includes multiple recesses that are recessed into the housing and are spaced apart on the outer surface of the housing.

[0011] The floor brush assembly in this embodiment effectively breaks the acoustic continuity of the housing by setting specifically distributed recesses on the outer surface of the motor module housing as a first noise reduction structure. This optimizes the housing's structural dynamics, alters its vibration modes, and disperses concentrated vibration energy into higher-order modes, thereby significantly suppressing the housing's efficiency as a noise radiation surface. Simultaneously, the complex recessed structure enhances the scattering, interference, and dissipation of sound wave energy and improves overall structural damping. Ultimately, this effectively reduces structural and airborne sound generated by the motor operation at the noise source, significantly lowering the overall operating noise of the floor brush assembly and significantly improving the user experience.

[0012] In one possible implementation, the recessed portion's radial depth is 40%-60% of the shell wall thickness. This depth range is an optimized range validated through extensive acoustic simulations and experiments. Within this range, the recessed structure can maximize the disturbance of sound waves and alter the shell's vibration mode, thereby achieving better noise reduction. Furthermore, this ensures the shell retains sufficient mechanical strength and structural stability, avoiding structural deformation or new vibrational noises that might result from excessive wall thickness reduction, thus achieving a balance between noise reduction performance and product reliability.

[0013] In one possible implementation, the depth of the recess in the radial direction of the housing is 50% of the housing wall thickness.

[0014] In one possible implementation, the recess is integrally formed on the outer surface of the housing during injection molding.

[0015] By integrally injection molding the recessed portion with the housing, secondary processing is avoided, ensuring the consistency of the shape and depth of the primary noise reduction structure, thus making the noise reduction effect stable and reliable. It also avoids additional vibrations or abnormal noises caused by assembly gaps, improving the overall product quality.

[0016] In one possible implementation, the central axes of the multiple recesses are parallel to each other, and the direction of the central axes of the recesses is parallel to the draft direction of the housing.

[0017] This design allows the first noise reduction structure to be directly demolded without increasing mold complexity (such as by using a side core-pulling mechanism). This significantly reduces mold costs and manufacturing difficulty.

[0018] In one possible implementation, the outer peripheral surface of the housing includes a first surface and a second surface that are opposite to each other along the draft direction; the first noise reduction structure is disposed on the first surface and the second surface.

[0019] This configuration allows the first noise reduction structure to be concentrated on the two outer surfaces of the housing with the largest surface area, enabling acoustic treatment of the main noise radiation areas and maximizing the noise reduction range. Furthermore, this ensures that the central axis of the recessed portion is parallel to the draft direction, allowing the entire housing with the first noise reduction structure to be injection molded in one simple step using a simple mold, eliminating the need for complex side core-pulling mechanisms and significantly reducing mold complexity and manufacturing costs.

[0020] In one possible implementation, the housing includes a front shell and a rear shell, which are detachably connected; a first noise reduction structure is disposed on at least one of the front shell and the rear shell.

[0021] By applying the first noise reduction structure to at least one of the front and rear shells, it is beneficial to achieve all-round, no-dead-angle acoustic encapsulation of motor noise, avoid sound leakage caused by local untreated areas, and improve the uniformity of the overall noise reduction effect.

[0022] In one possible implementation, the rear shell is located at one end of the front shell along its axial direction. The front shell includes a connecting portion that protrudes outward along its axial direction and has a locking hole on the connecting portion. The rear shell includes a mating portion that is recessed into the rear shell and has a locking protrusion on the mating portion. When the front shell and the rear shell are inserted into each other, the locking protrusion engages with the locking hole. The forming directions of the locking hole of the connecting portion and the locking protrusion of the mating portion are parallel to the central axis of the recessed portion.

[0023] This design ensures the alignment accuracy and bonding strength of the front and rear shell connections, effectively preventing impact noises during operation due to loose connections. The forming direction of the locking holes and engaging protrusions is parallel to the central axis of the recesses, thus maintaining consistency with the shell's draft direction. This allows the entire complex connection structure to be injection molded in the same mold as the shell and its noise-reducing recesses, through a single drafting action. This avoids the use of complex mold structures such as side core pulling, greatly simplifying mold design and reducing manufacturing costs.

[0024] In one possible implementation, the first noise reduction structure is positioned away from the connection point.

[0025] This design, by avoiding the use of noise-reducing recesses at this location, maximizes the preservation of the original wall thickness and continuous material structure of the connection, thereby ensuring sufficient mechanical strength and resistance to deformation. It effectively prevents problems such as unreliable connections, loose fits, or fatigue fractures under long-term vibration that may result from localized strength weakening, avoids new sources of abnormal noise due to structural failure, and ensures the durability of the noise reduction function and the overall reliability of the product.

[0026] In one possible implementation, the orthographic projection of the recess on a plane perpendicular to the central axis of the recess is a circle, an ellipse, or a polygon; the diameter of the largest circumscribed circle of the orthographic projection of the recess on a plane perpendicular to the central axis of the recess is less than or equal to 5 mm.

[0027] This design effectively suppresses mid-to-high frequency noise generated during motor operation, as this type of noise has a shorter wavelength and interacts more significantly with small-sized acoustic structures. Offering various projected shapes such as circles, ellipses, or polygons enhances design flexibility, allowing for the selection of optimal sound wave scattering and dissipation patterns based on specific acoustic spectral characteristics to precisely match the target noise reduction frequency band. Furthermore, the densely distributed small-scale recesses form a highly efficient broadband acoustic suppression layer on the housing surface, significantly improving the attenuation of harsh high-frequency howling noise.

[0028] In one possible implementation, the motor module further includes a reducer and a vibration absorber; wherein the reducer is connected to the output shaft of the motor, and the output shaft of the reducer is connected to the roller brush drive, and the motor is used to drive the roller brush to rotate through the reducer; the vibration absorber is located at the reducer.

[0029] By specifically installing a vibration absorber at the reducer, the high-frequency vibration energy generated during gear transmission and the vibration of the motor rotation can be actively absorbed and dissipated, directly suppressing noise at its source. This forms a highly efficient complement to the first noise reduction structure on the housing surface: the first noise reduction structure mainly deals with the electromagnetic vibration and radiated noise of the motor, while the vibration absorber mainly targets gear meshing impact noise and motor vibration noise.

[0030] In one possible implementation, the vibration absorber is located at the end of the reducer away from the output shaft of the motor.

[0031] With this configuration, the end of the reducer furthest from the motor's output shaft is the reducer's output end, which bears the greatest gear meshing impact force and torque fluctuations, making it the part that vibrates most intensely. Placing the vibration absorber here allows for the most direct and effective capture and dissipation of the primary vibration energy from the gear transmission, achieving precise suppression of the vibration source and thus obtaining optimal vibration reduction and noise reduction effects.

[0032] In one possible implementation, the vibration absorber includes a vibration-absorbing container and damping particles; wherein, a cavity structure is formed inside the vibration-absorbing container, and damping particles are disposed inside the cavity structure.

[0033] This setup utilizes the principle of particle damping technology to achieve efficient vibration absorption. When the reducer is running, its vibration energy is transferred to the vibration-absorbing container, causing the damping particles inside the cavity to generate intense and disordered friction and impact motion. During this process, the harmful mechanical kinetic energy of the gear system is continuously converted into the internal energy (heat energy) of the damping particles and dissipated. This vibration absorption method has significant advantages such as wide bandwidth, high efficiency, and high reliability, and can effectively suppress the mid-to-high frequency noise generated by gear meshing, thereby further reducing the overall noise level of the floor brush during operation.

[0034] In one possible implementation, the cavity structure is provided with multiple partition walls; the partition walls extend along the axial direction of the shell, and the multiple partition walls are spaced apart along the circumference of the shell, the partition walls are used to divide the cavity structure into multiple sub-cavities; each sub-cavity is provided with damping particles, and the surface of the partition wall facing the sub-cavity forms a wave-like undulating structure.

[0035] By incorporating a wave-like undulating structure, the contact area and complexity of the contact mechanism between the particles and the cavity wall can be further increased. This structure enhances frictional energy dissipation and generates more disturbance and refraction in the particle motion, disrupting the regularity of the particle flow and preventing resonance. This ensures that the vibration absorber maintains stable and efficient vibration absorption performance over a wider frequency range.

[0036] In one possible implementation, the brush includes a brush cavity; a motor module is disposed within the brush cavity, and there is a gap between the housing and the brush cavity.

[0037] This design creates an air layer between the wall of the brush chamber and the outer surface of the housing. This air layer acts as a physical sound insulation cavity, providing sound insulation. Furthermore, the gap between the housing and the brush chamber avoids rigid contact, cutting off the vibration transmission path and preventing motor vibration from being directly transmitted to the brush and amplified into radiated noise. Additionally, the air layer formed between the housing and the brush chamber is uneven due to the multiple recesses on the housing surface. This unevenness helps dissipate noise energy during transmission, further reducing noise levels.

[0038] In one possible implementation, the roller brush includes:

[0039] The roller brush body has multiple second noise reduction structures on its outer surface. The second noise reduction structure includes multiple noise reduction ribs or noise reduction grooves. The multiple noise reduction ribs or noise reduction grooves are spaced apart along the axial direction of the roller brush body and extend along the circumference of the roller brush.

[0040] The fluff layer is fitted onto the outer surface of the roller brush body.

[0041] By incorporating circumferentially extending noise-reducing ribs or grooves on the outer surface of the roller brush body, an impedance variation zone is created, effectively disrupting the original acoustic continuity of the roller brush body in both the axial and circumferential directions. This divides the originally large, continuous, and highly efficient sound radiation surface into multiple smaller regions with different acoustic characteristics. When the roller brush body vibrates due to rotation or impact, this discontinuous acoustic interface significantly suppresses the efficiency of vibration energy radiating outward in the form of sound waves, thereby reducing the overall noise level.

[0042] Furthermore, the circumferentially extended noise reduction structure significantly reduces the actual contact area between the brush body and the scraper and / or comb teeth, thereby directly reducing frictional resistance and high-frequency whistling noise caused by friction.

[0043] In one possible implementation, the noise-reducing ribs or grooves are continuous annular structures.

[0044] This configuration allows the ring structure to provide a continuous and uniform noise reduction effect, ensuring that the contact between the roller brush and the scraper and / or comb teeth is optimized at any rotation angle, and avoiding periodic noise fluctuations that may occur due to the discontinuity of the second noise reduction structure.

[0045] In one possible implementation, the noise-reducing ribs or grooves include a plurality of raised or recessed units arranged at intervals along the circumference of the roller brush.

[0046] This configuration creates a highly discontinuous acoustic impedance distribution on the surface of the roller brush. This periodic or non-periodic discrete structure can more effectively scatter and diffract the sound waves generated by the roller brush vibration, greatly disrupting the conditions for sound wave radiation on the roller brush surface, thereby significantly reducing its efficiency as a noise radiating surface.

[0047] A second aspect of this application provides a cleaning device, including a body and a floor brush assembly as described in any of the first aspects, wherein the body is connected to the floor brush assembly. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of a floor brush assembly provided in an embodiment of this application;

[0050] Figure 2 This is a schematic diagram of the structure of a motor module for a floor brush assembly provided in an embodiment of this application;

[0051] Figure 3 for Figure 2 A cross-sectional view of the motor shown in the diagram (AA section);

[0052] Figure 4 This is a schematic diagram of the motor module of a floor brush assembly from another angle, provided in an embodiment of this application.

[0053] Figure 5 An exploded view of the motor module of a floor brush assembly provided in this application embodiment;

[0054] Figure 6 An exploded view of the motor module of another floor brush assembly provided in an embodiment of this application;

[0055] Figure 7 for Figure 6A schematic cross-sectional view of the vibration absorber on the motor shown in the diagram;

[0056] Figure 8 A cross-sectional structural diagram of the roller brush of a floor brush assembly provided in an embodiment of this application;

[0057] Figure 9 This is an exploded view of the roller brush of a floor brush assembly provided in an embodiment of this application;

[0058] Figure 10 This is a cross-sectional structural diagram of a floor brush assembly provided in an embodiment of this application.

[0059] Explanation of reference numerals in the attached figures:

[0060] 100 - Floor brush assembly; 10 - Base; 20 - Roller brush;

[0061] 21-Roller brush body; 211-Second noise reduction structure; 22-Fluff layer;

[0062] 23-Brush chamber; 30-Motor module; 31-Motor;

[0063] 32 - Shell; 32a - Front shell; 32b - Rear shell;

[0064] 321 - First noise reduction structure; 322 - Recessed portion; 323 - Connecting portion;

[0065] 3231 - Slot; 324 - Mating part; 3241 - Engaging protrusion;

[0066] 33-Reducer; 34-Vibration absorber; 341-Vibration-absorbing container;

[0067] 342 - Separator wall; 343 - Wavy structure; 344 - Sub-cavity;

[0068] 35 - Transmission device; 40 - Scraper bar; 50 - Comb teeth;

[0069] S1 - First side; S2 - Second side; 60 - Handle assembly. Detailed Implementation

[0070] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0071] Floor scrubbers, as highly efficient cleaning equipment, integrate multiple functions such as water spraying, floor scrubbing, wastewater collection, and floor drying, and are widely used in homes and various commercial spaces. Their core working principle involves a motor driving a high-speed rotating roller brush. The friction between the brush and the floor, along with the chemical action of the cleaning solution, removes stains. Simultaneously, a squeegee removes wastewater, which is then collected by powerful suction, achieving both cleaning and rapid floor drying.

[0072] Floor scrubbers generate unpleasant operating noise, especially from the brush assembly. To reduce this noise, related technologies employ protruding nail-like elements on the outside of the motor housing. These elements create point contact with the inner surface of the brush chamber, thereby minimizing the mechanical contact area between the motor and the brush chamber. This significantly reduces vibration and noise energy transmitted through the solid structure.

[0073] However, this structure requires contact with the inner surface of the brush chamber, and numerous independent nail-like elements form discontinuous hard point contacts with the outer casing. Under complex operating conditions (such as motor start-stop, minor displacements caused by load changes, or thermal expansion and contraction of the casing), these point contacts may produce slight relative sliding or knocking, thereby inducing new high-frequency abnormal noises such as "creaking" or "tapping," which actually reduces the user experience.

[0074] To address the aforementioned technical problems, this application provides a floor brush assembly. By setting a first noise reduction structure on the outer surface of the motor housing, the acoustic continuity of the housing can be effectively broken, the dynamic characteristics of the housing structure can be optimized, the vibration modes of the housing can be changed, and the concentrated vibration energy can be dispersed and converted into higher-order modes, thereby significantly suppressing the efficiency of the housing as a noise radiation surface and solving the problem from the source of noise generation.

[0075] The floor brush assembly and cleaning equipment provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0076] Figure 1 This is a schematic diagram of the structure of a floor brush assembly provided in an embodiment of this application. Figure 2 This is a schematic diagram of the motor module of a floor brush assembly provided in an embodiment of this application.

[0077] It should be noted that, for ease of description, in the embodiments of this application, the height direction of the floor brush assembly is taken as the z-direction, the axial direction of the roller brush is taken as the x-direction, and the draft direction of the housing is taken as the y-direction.

[0078] This application provides a floor brush component, such as... Figure 1 and Figure 2As shown, the floor brush assembly 100 may include a base 10, a roller brush 20, and a motor module 30. The motor module 30 is used to drive the roller brush 20 to rotate, so that the floor brush assembly 100 can clean the surface to be cleaned.

[0079] For example, the base 10 constitutes the main structure of the floor brush assembly 100, for connection to or as part of the main unit of the cleaning equipment. The roller brush 20 is rotatably connected to the base 10 via the handle assembly 60, and its outer surface is typically provided with a bristle layer 22 for cleaning operations.

[0080] like Figure 2 As shown, the motor module 30 is the core component that drives the roller brush 20 to rotate. The motor module 30 may include a motor 31 (see Figure 31). Figure 5 (As shown) and a housing 32 fitted over the outside of the motor 31. The motor 31 is used for driving the roller brush 20 and driving the roller brush 20 to rotate, thereby providing rotational power to the roller brush 20. The housing 32 is mainly used to house and protect the motor 31, and also serves as the base for structural installation. A first noise reduction structure 321 is formed on the outer surface of the housing 32. The first noise reduction structure 321 may include a plurality of recesses 322 recessed into the housing 32, and the plurality of recesses 322 are spaced apart on the outer surface of the housing 32.

[0081] The floor brush assembly 100 in this embodiment effectively breaks the acoustic continuity of the housing 32 by setting specifically distributed recesses 322 on the outer surface of the housing 32 of the motor module 30 as a first noise reduction structure 321. This optimizes the structural dynamic characteristics of the housing 32, changes the vibration modes of the housing 32, disperses concentrated vibration energy and converts it into higher-order modes, thereby significantly suppressing the efficiency of the housing 32 as a noise radiation surface. Simultaneously, the complex recessed structure enhances the scattering, interference, and dissipation of sound wave energy and improves the overall structural damping. Ultimately, this effectively reduces structural and airborne sound generated by the operation of the motor 31 at the noise source, significantly reducing the overall operating noise of the floor brush assembly 100 and significantly improving the user experience of the product.

[0082] Compared to related technologies that rely on minimizing the contact area (point contact) to block the transmission path of vibration and structural sound, this approach is only effective in suppressing low-to-mid-frequency vibrations transmitted through solids, with limited effectiveness against directly radiated high-frequency airborne noise. The technical solution in this application, by optimizing the acoustic characteristics of the component itself (breaking acoustic continuity) and the structural dynamics characteristics (changing stiffness, damping, and vibration modes), suppresses noise generation at its source, resulting in a wider noise reduction bandwidth, superior performance, and a significantly improved user experience. Furthermore, it achieves noise reduction regardless of whether the motor module is in contact with the roller brush, making it applicable to a wider range of applications.

[0083] like Figure 3As shown, the depth h of the recess 322 in the radial direction of the housing 32 is 40%-60% of the wall thickness t of the housing 32.

[0084] It should be noted that "radial direction of housing 32" refers to the direction radiating outward from the center of the circle of the housing 32 cross-section, within any cross-sectional plane passing through the axis of housing 32. For any point on the outer surface of housing 32, its radial direction is the direction of the line connecting that point and the axis of housing 32 pointing outward.

[0085] The depth h of the recess 322 in the radial direction of the housing 32 is defined as: the distance measured in the radial direction of the housing 32 at the center of the opening of the recess 322, that is, the vertical distance from the lowest point of the bottom of the recess 322 to the imaginary original outer surface contour line of its opening.

[0086] The wall thickness t of the housing 32 is defined as: the wall thickness of the housing 32 before it is weakened by the recess 322, measured radially at the center of the opening of the recess 322.

[0087] For example, the depth h of the recess 322 is 40%, 45%, 50%, 55%, or 60% of the wall thickness t of the housing 32.

[0088] The depth range of 40%-60% is an optimized range verified through extensive acoustic simulations and experiments. Within this range, the recessed structure can maximize the disturbance of sound waves and change the vibration mode of the shell 32, thereby achieving a better noise reduction effect. In addition, this can also ensure that the shell 32 retains sufficient mechanical strength and structural stability, avoiding structural deformation or new vibration abnormalities that may be caused by excessive reduction of wall thickness, thus achieving a balance between noise reduction performance and product reliability.

[0089] In one possible implementation, the recess 322 can be integrally formed on the outer surface of the housing 32 during injection molding. That is, the recess 322 can be injection molded together with the housing 32. By integrally injection molding the recess 322 and the housing 32, secondary processing is avoided, ensuring the consistency of the shape and depth of the first noise reduction structure 321, thereby making the noise reduction effect stable and reliable. It also avoids additional vibration or abnormal noise caused by assembly gaps, improving the overall quality of the product.

[0090] For example, the outer peripheral surface of the housing 32 may include a first surface S1 and a second surface S2 that are opposite to each other along the draft direction (y direction). The first noise reduction structure 321 may be disposed on the first surface S1 and the second surface S2. For example, the draft direction (y direction) may be parallel to the radial direction of the housing 32.

[0091] This arrangement allows the first noise reduction structure 321 to be concentrated on the two outer surfaces of the housing 32 with the largest surface area, enabling acoustic treatment of the main noise radiation areas and maximizing the noise reduction range. Furthermore, this ensures that the central axis of the recessed portion 322 is parallel to the draft direction, allowing the entire housing 32 with the first noise reduction structure 321 to be injection molded in a single step using a simple mold, eliminating the need for complex lateral core-pulling mechanisms. This not only guarantees the consistency of the shape and depth of the first noise reduction structure 321, resulting in a stable and reliable noise reduction effect, but also significantly reduces the complexity of the mold and manufacturing costs.

[0092] In some embodiments, such as Figure 3 As shown, the central axes of the multiple recesses 322 can be parallel to each other, and the direction of the central axes of the recesses 322 is parallel to the draft direction of the housing 32. This configuration allows the first noise reduction structure 321 to be directly demolded without increasing mold complexity (such as by using a side core-pulling mechanism). This significantly reduces mold cost and manufacturing difficulty.

[0093] In some embodiments, the plurality of recesses 322 can be discretely distributed on the first surface S1 and the second surface S2. That is, the distribution of the plurality of recesses 322 can be irregular. By discretely distributing the plurality of recesses 322 on the first surface S1 and the second surface S2, targeted and efficient local acoustic suppression can be performed on specific resonant frequency bands generated by the operation of the motor 31, thereby achieving precise noise reduction.

[0094] Of course, in other embodiments, the plurality of recesses 322 may be evenly distributed on the first surface S1 and the second surface S2 of the housing 32 (e.g., 2 and 3). Figure 3 (As shown). By evenly distributing multiple recesses 322 on the first surface S1 and the second surface S2, a wide-bandwidth, balanced noise control scheme can be provided, which can stably and comprehensively suppress the full-frequency noise generated by the operation of the motor 31.

[0095] In this embodiment, the distribution of the plurality of recesses 322 is not further limited.

[0096] Figure 4 This is a schematic diagram of the motor module of a floor brush assembly provided in an embodiment of this application from another angle. Figure 4 This is a frontal projection view of the motor module 30 on a plane perpendicular to the draft direction.

[0097] like Figure 4 As shown, the orthographic projection of the recess 322 onto a plane perpendicular to the draft direction is circular, elliptical, or polygonal. The diameter of the largest circumscribed circle of the orthographic projection of the recess 322 onto a plane perpendicular to the draft direction is less than or equal to 5 mm.

[0098] For example, the maximum circumscribed circle diameter of the orthographic projection of the recess 322 onto a plane perpendicular to the draft direction can be 5mm, 4mm, 3mm, 2mm, etc. In the embodiments of this application, the maximum circumscribed circle diameter of the orthographic projection of the recess 322 onto a plane perpendicular to the draft direction is not further limited.

[0099] This design allows the small-sized (≤5mm) recessed structure to effectively suppress mid-to-high frequency noise generated during motor 31 operation. This is because the short wavelength of this noise makes its interaction with the small acoustic structure more significant. Offering various projected shapes such as circles, ellipses, or polygons improves design flexibility, allowing for the selection of optimal sound wave scattering and dissipation patterns based on specific acoustic spectral characteristics to precisely match the target noise reduction frequency band. Furthermore, the densely distributed small-scale recesses 322 form a highly efficient broadband acoustic suppression layer on the surface of the housing 32, significantly enhancing the attenuation of harsh high-frequency howling noise.

[0100] In some embodiments, the housing includes a front housing and a rear housing, which are detachably connected; a first noise reduction structure is disposed on at least one of the front housing and the rear housing.

[0101] like Figure 5 As shown, the housing 32 may include a front housing 32a and a rear housing 32b, which are detachably connected. A first noise reduction structure 321 is simultaneously disposed on both the front housing 32a and the rear housing 32b. That is, a portion of the recessed portion 322 of the first noise reduction structure 321 is located on the front housing 32a, and another portion is located on the rear housing 32b. The arrangement of the recessed portions 322 on the front housing 32a and the rear housing 32b may be the same or different. In this embodiment, the distribution of multiple recessed portions 322 is not further limited.

[0102] By applying the first noise reduction structure 321 to both the front shell 32a and the rear shell 32b, the noise of the motor 31 can be completely and acoustically enveloped without any blind spots, avoiding sound leakage caused by untreated areas and improving the uniformity of the overall noise reduction effect.

[0103] In one possible implementation, the front shell 32a and the rear shell 32b can be connected via a snap-fit ​​structure. This significantly reduces the number of rigid connection points compared to traditional screw connections. It effectively reduces the efficiency of vibration wave transmission between the different shell components 32 through the connection interface, blocking vibration propagation along the propagation path and thus reducing additional noise caused by resonance between components. Simultaneously, the snap-fit ​​connection simplifies the assembly process and improves production efficiency.

[0104] like Figure 2As shown, the rear shell 32b is located at one end of the front shell 32a along the axial direction, and part of the structure of the rear shell 32b is inserted into the interior of the front shell 32a.

[0105] like Figure 5 As shown, the front shell 32a may include a connecting portion 323 protruding outward along the axial direction (x direction), and the connecting portion 323 is provided with a locking hole 3231. The rear shell 32b may include a mating portion 324 recessed into the rear shell 32b, and the mating portion 324 is provided with a locking protrusion 3241. When the front shell 32a and the rear shell 32b are inserted and mated, the locking protrusion 3241 engages with the locking hole 3231. The forming direction of the locking hole 3231 of the connecting portion 323 and the locking protrusion 3241 of the mating portion 324 is parallel to the central axis of the recess 322, that is, it is consistent with the draft direction (y direction) of the shell 32.

[0106] For example, there are two connecting parts 323, which are located on the first surface S1 and the second surface S2, respectively. Each connecting part 323 corresponds to a mating part 324.

[0107] This design ensures the alignment accuracy and bonding strength of the connection between the front shell 32a and the rear shell 32b, effectively preventing impact noises during operation due to loose connections. The forming direction of the locking hole 3231 and the engaging protrusion 3241 is consistent with the draft direction of the shell 32, allowing the entire complex connection structure to be injection molded in the same mold as the shell 32 and the noise-reducing recess 322 on the surface of the shell 32, through the same drafting action. This avoids the use of complex mold structures such as side core pulling, greatly simplifying mold design and reducing manufacturing costs.

[0108] Of course, in other embodiments, the connecting part 323 and the mating part 324 may be configured with other structures. In the embodiments of this application, the shape and setting position of the connecting part 323 and the mating part 324 are not further limited.

[0109] like Figure 5 As shown, the first noise reduction structure 321 is positioned away from the connecting portion 323. That is, no recess 322 is provided on the connecting portion 323. By avoiding the placement of a noise reduction recess at this location, the original wall thickness and continuous material structure of the connecting portion 323 are preserved to the maximum extent, thereby ensuring that the connecting portion 323 has sufficient mechanical strength and resistance to deformation. This effectively prevents problems such as unreliable connections, loose fits, or fatigue fractures under long-term vibration that may result from localized strength weakening, avoids the generation of new sources of abnormal noise due to structural failure, and ensures the durability of the noise reduction function and the overall reliability of the product.

[0110] Figure 6 An exploded view of the motor module of another floor brush assembly provided in this application embodiment.

[0111] like Figure 6 As shown, in some other embodiments, the motor module 30 may further include a reducer 33 and a vibration absorber 34. The reducer 33 is connected to the output shaft (not shown) of the motor 31, and the output shaft of the reducer 33 is driven by the roller brush 20. The motor 31 drives the roller brush 20 to rotate via the reducer 33. The vibration absorber 34 is located at the reducer 33 to reduce noise generated by gear meshing.

[0112] For example, the vibration absorber 34 can be a ring structure with an internal cavity, sleeved on the outside of the reducer 33. The cavity structure can be provided with damping particles for vibration absorption.

[0113] For example, the reducer 33 may include multiple meshing gear transmission structures, the output shaft of the motor 31 is connected to the gear transmission structures in the reducer 33, and then the power is transmitted to the output shaft of the reducer 33.

[0114] By specifically installing a vibration absorber 34 at the reducer 33, the high-frequency vibration energy generated during gear transmission and the vibration of the motor 31 rotation can be actively absorbed and dissipated, directly suppressing noise at its source. This forms a highly efficient complement to the first noise reduction structure 321 on the surface of the housing 32: the first noise reduction structure 321 of the housing 32 mainly deals with the electromagnetic vibration and radiated noise of the motor 31, while the vibration absorber 34 mainly targets the gear meshing impact noise and the vibration noise of the motor.

[0115] For example, the vibration absorber 34 is located at the end of the reducer 33 away from the output shaft of the motor 31.

[0116] It should be noted that the end of the reducer 33 furthest from the output shaft of the motor 31 is the output end of the reducer 33, which bears the greatest gear meshing impact force and torque fluctuation, and is the part with the most severe vibration.

[0117] By placing the vibration absorber 34 here, the main vibration energy from the gear drive can be captured and dissipated most directly and effectively, achieving precise suppression of the vibration source and thus obtaining the best vibration reduction and noise reduction effect.

[0118] like Figure 7 As shown, the vibration absorber 34 may include a vibration-absorbing container 341 and damping particles (not shown in the figure). The vibration-absorbing container 341 has a cavity structure, and the damping particles are disposed within the cavity structure.

[0119] For example, the damping can be some small particles. In the embodiments of this application, the shape and material of the damping particles are not further limited.

[0120] By incorporating damping particles within the cavity structure of the vibration-absorbing container 341, efficient vibration absorption can be achieved using the principle of particle damping technology. When the reducer 33 is running, its vibration energy is transferred to the vibration-absorbing container 341, causing the damping particles within the cavity to generate intense and disordered frictional and impact motions. During this process, the harmful mechanical kinetic energy of the gear system is continuously converted into the internal energy (heat energy) of the damping particles and dissipated. This vibration absorption method has significant advantages in terms of wide bandwidth, high efficiency, and high reliability, effectively suppressing mid-to-high frequency noise generated by gear meshing, thereby further reducing the overall noise level during the operation of the floor brush.

[0121] like Figure 7 As shown, the cavity structure of the vibration-absorbing container 341 is provided with multiple partition walls 342. The partition walls 342 extend along the axial direction of the shell 32, and the multiple partition walls 342 are spaced apart along the circumference of the shell 32. The partition walls 342 are used to divide the cavity structure into multiple sub-cavities 344. Each sub-cavity 344 is provided with damping particles.

[0122] By setting partition walls 342, a large cavity can be divided into multiple independent sub-cavities 344, effectively restricting the overall movement of damping particles within a single large cavity, and causing the particles to collide and rub more frequently and violently in a smaller space. This significantly increases the interaction frequency and energy conversion efficiency between particles and between particles and the cavity walls, thereby greatly improving the vibration energy dissipation rate and vibration absorption efficiency of the particle damper per unit volume.

[0123] In some embodiments, the surface of the partition wall 342 facing the sub-cavity 344 is formed with a wave-like structure 343.

[0124] It should be noted that "wave undulation structure 343" refers to a structure with an uneven surface, which can also be understood as a structure with protrusions or grooves on the surface, or a stepped ridge, etc. In the embodiments of this application, the specific shape of the wave undulation structure 343 is not further limited. Of course, in other embodiments, the wave undulation structure 343 may not be provided.

[0125] By incorporating the wave-like undulation structure 343, the contact area and complexity of the contact method between the particles and the cavity wall can be further increased. The wave-like undulation structure 343 can enhance the frictional energy dissipation effect and generate more disturbance and refraction on the particle movement, breaking the regularity of the particle flow and preventing resonance, thereby ensuring that the vibration absorber 34 maintains stable and efficient vibration absorption performance over a wider frequency range.

[0126] Figure 8 This is a cross-sectional structural diagram of the roller brush of a floor brush assembly provided in an embodiment of this application.

[0127] like Figure 8As shown, the roller brush 20 may include a roller brush cavity 23, a motor module 30 is disposed in the roller brush cavity 23, and there is a gap m between the housing 32 and the roller brush cavity 23.

[0128] For example, in combination Figure 5 and Figure 8 As shown, the motor module 30 may further include a transmission 35, which is disposed at one axial end of the housing 32. The output end of the reducer 33 extends to the outside of the housing 32 and is connected to the transmission 35. The transmission 35 is drivenly connected to the roller brush 20.

[0129] For example, the actuator 35 is connected to the wall of the brush chamber 23. This allows the motor 31 to rotate, driving the reducer 33 to rotate, which in turn drives the actuator 35 to rotate, and the actuator 35 to rotate, driving the brush 20 to rotate.

[0130] By creating a gap m between the housing 32 and the brush cavity 23, an air layer can be formed between the cavity wall of the brush cavity 23 and the outer surface of the housing 32. This air layer can act as a physical sound insulation cavity, providing sound insulation. Furthermore, the gap between the housing 32 and the brush cavity 23 avoids rigid contact, cutting off the vibration transmission path and preventing the vibration of the motor 31 from being directly transmitted to the brush 20 and amplified into radiated noise.

[0131] In addition, the air layer formed between the housing 32 and the brush cavity 23 is uneven because the housing surface has multiple recesses 322. The uneven air layer can consume the energy of noise during noise transmission and further reduce noise.

[0132] Combination Figure 8 and Figure 9 As shown, the roller brush 20 may include a roller brush body 21 and a bristle layer 22. The outer surface of the roller brush body 21 is provided with multiple second noise reduction structures 211, each including multiple noise reduction ribs or grooves. These ribs or grooves are spaced apart along the axial direction (x-direction) of the roller brush body 21 and extend circumferentially along the roller brush 20. The bristle layer 22 is fitted onto the outer surface of the roller brush body 21.

[0133] like Figure 9 As shown, the noise reduction ribs or noise reduction grooves include multiple raised units or recessed units arranged at 20 circumferential intervals along the roller brush.

[0134] By providing circumferentially extending noise-reducing ribs or grooves on the outer surface of the brush body 21, an impedance variation zone is formed on the outer surface of the brush body 21, effectively breaking the original acoustic continuity of the brush body 21 in the axial and circumferential directions. This divides the originally large, continuous, and efficient sound radiation surface into multiple smaller regions with different acoustic characteristics. When the brush body 21 vibrates due to rotation or impact, this discontinuous acoustic interface can significantly suppress the efficiency of vibration energy radiating outward in the form of sound waves, thereby reducing the overall noise level.

[0135] In some embodiments, such as Figure 10 As shown, the floor brush assembly 100 may further include a scraper 40 and / or comb teeth 50, disposed on the base 10 and adapted to the roller brush 20 to maintain a preset contact pressure. The second noise reduction structure 211 is configured to reduce the contact area between the roller brush body 21 and the scraper 40 and / or comb teeth 50, thereby reducing frictional resistance and generated noise.

[0136] In the embodiments of this application, such as Figure 10 As shown, the floor brush assembly 100 may include a scraper 40 and comb teeth 50. The scraper 40 and comb teeth 50 are arranged adjacent to each other.

[0137] It should be noted that the scraper 40 is usually made of elastic and wear-resistant materials (such as rubber, silicone, etc.). Its function is to effectively scrape off most of the sewage and dirt carried on the brush 20's pile layer 22 after the roller brush 20 rotates and absorbs sewage, and guide it into the sewage recycling channel of the base 10, thereby achieving rapid drying of the floor. This is one of the core components of the floor scrubber to achieve the drying function.

[0138] The comb teeth 50 (which can be made of rigid plastic) are mainly used to comb the nap layer 22 on the surface of the roller brush 20 during operation, to prevent hair, fibers and other long entangled materials from getting too tangled on the roller brush 20, to maintain the fluffiness of the bristles and cleaning efficiency, and to reduce the increase in rotational resistance and power loss caused by the increase in entangled materials.

[0139] Of course, in some embodiments, the floor brush assembly 100 may only include the scraper 40. Alternatively, the floor brush assembly 100 may only include the comb teeth 50.

[0140] The circumferentially extended noise reduction structure significantly reduces the actual contact area between the brush body 21 and the scraper 40 and / or comb teeth 50, thereby directly reducing frictional resistance and high-frequency whistling noise caused by friction.

[0141] Of course, in some other embodiments, the noise-reducing ribs or grooves can also be continuous annular structures (not shown in the figures). In the embodiments of this application, the structure of the noise-reducing ribs or grooves is not further limited.

[0142] This configuration allows the annular structure to provide a continuous and uniform noise reduction effect, ensuring that the contact between the roller brush 20 and the scraper 40 and / or comb teeth 50 is optimized at any rotation angle, and avoiding periodic noise fluctuations that may occur due to the discontinuity of the second noise reduction structure 211.

[0143] This embodiment provides a cleaning device that may include a main body and a floor brush assembly 100 as described in any of the above embodiments, with the main body connected to the floor brush assembly 100. Because this cleaning device includes the aforementioned floor brush assembly 100 with excellent noise reduction effect, its overall operating noise is significantly reduced, and the user experience is greatly improved. This cleaning device may be a floor scrubber, or other forms of cleaning appliances with a rotating roller brush 20. In this embodiment, the specific type of cleaning device is not further limited.

[0144] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0145] In the description of this application, 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", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0146] In the description of this application, it should be understood that the terms “comprising” and “having” as used herein, and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are expressly listed, but may include other steps or units that are not expressly listed or that are inherent to such process, method, product, or apparatus.

[0147] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the connection within two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, the terms "first," "second," etc., 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.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A floor brush assembly, characterized in that, include: Base; The roller brush is rotatably connected to the base; The motor module includes a motor and a housing fitted over the outside of the motor. The motor is used to connect with the roller brush drive and to drive the roller brush to rotate. The outer surface of the housing is formed with a first noise reduction structure, which includes a plurality of recesses that are recessed into the housing and are spaced apart on the outer surface of the housing.

2. The floor brush assembly according to claim 1, characterized in that, The depth of the recess in the radial direction of the housing is 40%-60% of the housing wall thickness.

3. The floor brush assembly according to claim 2, characterized in that, The depth of the recess in the radial direction of the housing is 50% of the housing wall thickness.

4. The floor brush assembly according to any one of claims 1-3, characterized in that, The recessed portion is integrally formed on the outer surface of the housing during injection molding.

5. The floor brush assembly according to claim 4, characterized in that, The central axes of the plurality of recesses are parallel to each other, and the direction of the central axis of the recesses is parallel to the draft direction of the housing.

6. The floor brush assembly according to claim 5, characterized in that, The outer peripheral surface of the housing includes a first surface and a second surface that are opposite to each other along the draft direction. The first noise reduction structure is disposed on the first surface and the second surface.

7. The floor brush assembly according to claim 5, characterized in that, The housing includes a front housing and a rear housing, which are detachably connected; The first noise reduction structure is disposed on at least one of the front shell and the rear shell.

8. The floor brush assembly according to claim 7, characterized in that, The rear shell is located at one end of the front shell along its axial direction; The front housing includes a connecting portion that protrudes outward along the axial direction, and the connecting portion is provided with a locking hole; The rear shell includes a mating portion recessed into the interior of the rear shell, and the mating portion is provided with a locking protrusion; When the front shell and the rear shell are inserted and fitted together, the engaging protrusion engages and connects with the engaging hole; The forming direction of the locking hole of the connecting part and the locking protrusion of the mating part is parallel to the central axis of the recess.

9. The floor brush assembly according to claim 8, characterized in that, The first noise reduction structure is positioned away from the connecting portion.

10. The floor brush assembly according to any one of claims 1-3, characterized in that, The orthographic projection of the recessed portion onto a plane perpendicular to the central axis of the recessed portion is a circle, an ellipse, or a polygon. The diameter of the maximum circumscribed circle of the orthographic projection of the recessed portion onto a plane perpendicular to the central axis of the recessed portion is less than or equal to 5 mm.

11. The floor brush assembly according to any one of claims 1-3, characterized in that, The motor module also includes a reducer and a vibration absorber; wherein... The reducer is connected to the output shaft of the motor, and the output shaft of the reducer is connected to the roller brush drive. The motor is used to drive the roller brush to rotate through the reducer, and the vibration absorber is located at the reducer.

12. The floor brush assembly according to claim 11, characterized in that, The vibration absorber is located at the end of the reducer away from the output shaft of the motor.

13. The floor brush assembly according to claim 11, characterized in that, The vibration absorber includes a vibration-absorbing container and damping particles; wherein... The vibration-absorbing container has a cavity structure, and the damping particles are disposed within the cavity structure.

14. The floor brush assembly according to claim 13, characterized in that, The cavity structure is provided with multiple partition walls; The partition wall extends along the axial direction of the housing, and a plurality of the partition walls are spaced apart along the circumferential direction of the housing. The partition walls are used to divide the cavity structure into a plurality of sub-cavities. Each of the sub-cavities is provided with the damping particles, and the surface of the partition wall facing the sub-cavity has a wave-like structure.

15. The floor brush assembly according to any one of claims 1-3, characterized in that, The roller brush includes a roller brush cavity; The motor module is disposed inside the brush cavity, and there is a gap between the housing and the brush cavity.

16. The floor brush assembly according to any one of claims 1-3, characterized in that, The roller brush includes: The roller brush body has a second noise reduction structure on its outer surface. The second noise reduction structure includes multiple noise reduction ribs or noise reduction grooves. The multiple noise reduction ribs or noise reduction grooves are spaced apart along the axial direction of the roller brush body and extend along the circumferential direction of the roller brush. A fluff layer is fitted onto the outer surface of the main body of the roller brush.

17. The floor brush assembly according to claim 16, characterized in that, The noise-reducing ribs or noise-reducing grooves are continuous annular structures.

18. The floor brush assembly according to claim 16, characterized in that, The noise-reducing ribs or noise-reducing grooves include a plurality of raised units or recessed units arranged at intervals along the circumference of the roller brush.

19. A cleaning device, characterized in that, It includes a body and a floor brush assembly as described in any one of claims 1 to 18, wherein the body is connected to the floor brush assembly.

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