A surface cleaning apparatus

Abstract

The utility model discloses a surface cleaning device belongs to cleaning equipment technical field, including the ground brush with the casing, is equipped with the cleaning element, the ground brush is equipped with the scraping dirty subassembly of scraping dirty part and the adjusting motor, and the adjusting motor drives the scraping dirty subassembly counterrotation and makes scraping dirty part separate from the cleaning element, and the adjusting motor drives the scraping dirty subassembly positive rotation and makes scraping dirty part resist the cleaning element. The adjusting motor is axially vertical and is located in the ground brush, and the adjusting motor includes the shaft that is equipped with the worm, and the end of the shaft extends into the bearing chamber of the casing, and the scraping dirty subassembly is equipped with the worm wheel part, and the worm wheel part is axially transverse and the central axis coincides with the rotation axis, and the adjusting motor drives the scraping dirty subassembly rotation through the meshed worm and worm wheel part. The adjusting motor is axially vertical, and the transmission structure of the worm and worm wheel cooperation is used between the adjusting motor and the scraping dirty subassembly, the structure is relatively compact, and the required installation space is smaller, can avoid the interference to other components in the ground brush under the premise of not increasing the ground brush volume, makes the ground brush whole and keeps the compact structure.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, and in particular to a surface cleaning device. Background Technology

[0002] Existing handheld surface cleaners generally include a body, a floor brush, a liquid supply unit, and a suction unit. The floor brush has a suction port, a motor-driven cleaning component, and a scraping component for scraping the cleaning component. The liquid supply unit supplies liquid to the cleaning component, allowing it to absorb the liquid, wet it, and then wipe the floor. A fan provides suction, creating negative pressure inside the wastewater tank and forming an airflow that flows into the tank from the suction port. Dirt scraped out by the scraping component flows into the wastewater tank with the airflow. By using the scraping component to scrape out the wastewater and adhering dirt absorbed by the cleaning component, the cleaner's cleaning ability is ensured.

[0003] In traditional handheld surface cleaners, the cleaning component, once mounted on the brush, typically has a fixed front-to-back position. Because the cleaning component is almost flush against the front wall of the brush, larger particles or hair easily become trapped between them, accumulating over time. This trapped dirt is difficult to remove with the suction airflow and can cause the cleaning component to become clogged, increasing the load on the motor and compromising its performance. Furthermore, as dirt accumulates between the cleaning component and the brush, it can push the component away from the scraping assembly, reducing its effectiveness. Hair trapped between the two components can also become entangled in the cleaning component, further reducing its cleaning power and overall cleaning efficiency.

[0004] To address the drawbacks of non-adjustable scraping components, some handheld surface cleaners have incorporated movable scraping components within the brush, using a miniature motor to drive this motion. This miniature motor, through a transmission structure, allows the scraping component to engage with or disengage from the cleaning element. When engaged, the scraping component effectively scrapes and removes dirt; when disengaged, it easily cleans stuck dirt. However, in this design, the scraping component transmits the torque it experiences when scraping the cleaning element in the reverse direction to the miniature motor's shaft. Since the motor shaft is typically cantilevered, its capacity to withstand reverse torque is limited. Prolonged exposure to this reverse torque can cause deformation, potentially leading to deformation or failure of the transmission structure's meshing. This, in turn, can cause the scraping component to loosen and fail, reducing the cleaning ability of the cleaning element and negatively impacting the user experience.

[0005] Chinese patent application CN119405229A discloses a drive device installed within the base of a cleaning device. This drive device powers a scraping assembly that switches between a scraping position and an avoidance position. The drive device includes a drive motor and a transmission mechanism. The drive motor is axially and horizontally mounted within the base via a motor bracket. The transmission mechanism includes a driving gear, a driven gear, and a meshing part on the scraping assembly. Due to the large axial length of the drive motor, its horizontal mounting within the base via the motor bracket occupies significant installation space. Furthermore, the gear-driven transmission mechanism is complex and large, requiring considerable installation space. Consequently, the base needs to be large enough to accommodate the installation requirements of the original components and the drive device, resulting in a large and heavy overall base. Additionally, since the gear engagement lacks self-locking capability, the scraping assembly, which contacts the roller brush assembly, can easily transmit reaction force in the reverse direction through the transmission mechanism to the motor shaft of the drive motor, compromising the stability of the scraping assembly. Utility Model Content

[0006] In order to overcome the shortcomings and deficiencies of the existing technology, this utility model provides a surface cleaning device, which solves the technical problems of complex structure and large installation space required due to the horizontal placement of the motor and the use of gears to drive the scraping component. It also solves the technical problem that the large and heavy floor brush cannot enter low-ceilinged spaces for cleaning.

[0007] To achieve the aforementioned technical objectives, a floor brush with a housing is provided. The floor brush has a cleaning component, a scraping assembly with a scraping part, and an adjusting motor for driving the scraping assembly to rotate around a rotation axis. The adjusting motor drives the scraping assembly to rotate in reverse so that the scraping part disengages from the cleaning component, and drives the scraping assembly to rotate in the forward direction so that the scraping part contacts the cleaning component. The adjusting motor is axially vertically disposed inside the floor brush. The adjusting motor includes a rotating shaft with a worm gear. The end of the rotating shaft extends into the bearing chamber of the housing. The scraping assembly has a worm wheel that meshes with the worm gear. The worm wheel is axially transverse and its central axis coincides with the rotation axis. The adjusting motor drives the scraping assembly to rotate through the meshing worm gear and worm wheel.

[0008] Preferably, the housing of the floor brush includes an upper housing and a lower housing that are fixedly fastened together to form a receiving cavity, an adjusting motor is vertically disposed in the receiving cavity, and a bearing chamber is disposed at the bottom of the upper housing.

[0009] Preferably, the upper housing is fixed with a bracket, the bearing chamber is located on the bracket, and the bracket and the upper housing adopt a non-circular cross-section mating structure in the transverse direction.

[0010] Preferably, the lower housing has a centrally located suction port and a receiving cavity for mounting an adjustment motor, the receiving cavity being located close to the suction port.

[0011] Preferably, the lower housing has a through-hole near the suction port, and the worm gear extends into the receiving cavity from the through-hole and meshes with the worm.

[0012] Preferably, the rotating shaft is arranged upwards and its top end extends upwards beyond the worm, and a bearing adapted to the bearing housing is fitted on the top end of the rotating shaft; or, the rotating shaft is arranged upwards, and the top of the worm has an upwardly protruding support shaft that is coaxial with the rotating shaft, and a bearing adapted to the bearing housing is fitted on the support shaft; or, the rotating shaft is arranged upwards and its top end extends upwards beyond the worm, and the top of the worm has an upwardly protruding support shaft that is fitted on the outer periphery of the top end of the rotating shaft, and a bearing adapted to the bearing housing is fitted on the support shaft.

[0013] Preferably, the floor brush is further provided with at least a water distribution component for supplying liquid to the cleaning component, and the sludge scraping component is located at least partially around the water distribution component, and the sludge scraping component is driven by an adjusting motor to rotate around the water distribution component.

[0014] Preferably, one of the water distribution component and the scraping assembly is provided with an arc-shaped extension concentric with the worm gear portion, and the other is provided with an arc-shaped groove that cooperates with the arc-shaped extension portion. At least a portion of the arc-shaped extension portion is inserted into the arc-shaped groove, and the scraping assembly driven by the adjusting motor causes the arc-shaped extension portion and the arc-shaped groove to move relative to each other.

[0015] Preferably, the thread helix angle α of the worm is 5° to 15°.

[0016] Preferably, the floor brush has a mounting cavity facing the cleaning component, and the scraping component is rotatably disposed in the mounting cavity. A soft rubber component is provided between the bottom surface of the scraping component and the lower cavity wall of the mounting cavity to cover the gap between the two. The scraping component, driven to rotate, causes the soft rubber component to change shape.

[0017] By adopting the above technical solution, this utility model has the following advantages:

[0018] 1. The surface cleaning device provided by this utility model includes a cleaning component, a scraping component, and an adjusting motor on a floor brush. When the adjusting motor drives the scraping component to rotate clockwise around its axis, the scraping component causes the scraping part to come into contact with the cleaning component, allowing the scraping part to smoothly scrape and squeeze the cleaning component, thereby ensuring the cleaning ability of the cleaning component. When the adjusting motor drives the scraping component to rotate counterclockwise around its axis, the scraping component disengages the scraping part from the cleaning component, facilitating the removal of dirt accumulated on the scraping part, dirt stuck between the cleaning component and the floor brush, and dirt stuck between the scraping part and the cleaning component, preventing dirt accumulation that could lead to bacterial growth and odor.

[0019] The adjusting motor is vertically mounted inside the floor brush. The rotating shaft of the adjusting motor is equipped with a worm gear. The worm wheel part that meshes with the worm gear is set on the sludge scraping assembly. The worm wheel part is horizontally mounted and its central axis coincides with the rotation axis of the sludge scraping assembly. The transmission and cooperation structure between the adjusting motor and the sludge scraping assembly is reasonably set so that the vertically mounted adjusting motor can smoothly drive the sludge scraping assembly to reciprocate around the rotation axis through the meshing worm gear and worm wheel part, so that the sludge scraping part of the sludge scraping assembly can abut against or disengage from the cleaning part. The end of the shaft extends into the bearing chamber, which radially limits the end of the shaft, preventing the shaft of the adjusting motor from forming a cantilever structure. This greatly improves the radial stability of the shaft, thereby increasing the reverse torque that the shaft can withstand. It effectively prevents the shaft from radially shifting or deforming due to the reverse transmission of the force between the scraping component and the cleaning component to the shaft. This ensures the meshing stability between the worm and the worm wheel, thus ensuring the structural stability of the scraping component when it contacts the cleaning component. This, in turn, ensures the scraping effect of the scraping component on the cleaning component, ultimately ensuring the cleaning ability of the cleaning component. It avoids situations where the cleaning ability decreases or there are too many residual water stains after cleaning because the cleaning component cannot be effectively scraped, thus improving the user experience.

[0020] The preferred transmission structure between the adjusting motor and the scraping assembly is a worm gear and worm wheel combination. Since the worm wheel only needs to drive the scraping assembly to reciprocate within a small angle range, the worm gear and worm wheel combination is compact and requires less installation space. This avoids interference with other components within the floor brush without increasing its overall size, maintaining a compact structure and allowing for easy control of the brush's dimensions, enabling it to clean in low-ceilinged spaces. Because the reduction ratio between the worm gear and worm wheel can be set relatively high, no additional reduction structure is needed. This transmission structure between the adjusting motor and the scraping assembly is more suitable for scenarios with limited installation space and also helps reduce production costs. Furthermore, the worm gear and worm wheel meshing provides a certain degree of self-locking performance. This self-locking force prevents the scraping assembly from transmitting the force exerted on the cleaning parts in the reverse direction to the rotating shaft through the transmission structure. This avoids the scraping assembly reversing and releasing the cleaning parts due to shaft rotation, ensuring the effective scraping of the cleaning parts by the scraping assembly.

[0021] 2. The upper and lower housings of the floor brush are fixedly fastened together to form a receiving cavity. The adjusting motor is vertically positioned within this cavity. The motor's location is strategically chosen to ensure it is inside the floor brush, preventing water or dust from entering and ensuring its performance stability. The bearing housing is preferably located on the upper housing of the floor brush. Correspondingly, the adjusting motor's shaft faces upwards, and the bearing is located at the top of the shaft. This bearing is housed within the bearing housing of the upper housing, preventing a cantilever at the top of the shaft and improving its structural stability. This strategic arrangement of the adjusting motor reduces assembly difficulty and lowers its center of gravity, improving the meshing stability between the worm gear and worm wheel, and resulting in a more compact structure.

[0022] 3. A bracket is provided on the upper housing, and the bearing chamber for housing the bearing is preferably located on the bracket. A reasonable design of the upper housing structure reduces the molding difficulty of the bearing chamber and also improves the structural strength of the bearing chamber by increasing the structural strength of the bracket. This ensures that the bearing chamber's structural strength meets the positioning requirements of the rotating shaft, preventing damage to the bearing chamber due to excessive bearing force. Furthermore, if the bearing chamber is damaged due to excessive bearing force, only the bracket needs to be replaced, significantly reducing maintenance costs and preventing the entire machine from becoming unusable due to bearing chamber damage, thus improving the user experience. A non-circular cross-section fit structure is preferably used between the bracket and the upper housing in the lateral direction. This allows the bracket to be simultaneously constrained circumferentially and radially, improving the structural stability of the bracket relative to the upper housing, thereby improving the structural stability of the bearing and rotating shaft, and ultimately ensuring the scraping stability of the cleaning components by the scraping assembly.

[0023] 4. The lower housing has a centrally located suction port. When the scraping part of the scraping assembly disengages from the cleaning component, dirt stuck between the scraping part and the cleaning component can be sucked away through the suction port. The lower housing has a receiving cavity for mounting the regulating motor. At least part of the regulating motor is located in the receiving cavity. This reduces the installation difficulty of the regulating motor and limits its movement, improving its structural stability. This also helps improve the stability of the fit between the worm and the worm wheel, thereby improving the structural stability of the scraping assembly when the scraping part contacts the cleaning component. The receiving cavity for mounting the regulating motor is preferably located close to the suction port. A reasonable positioning of the receiving cavity allows the worm and worm wheel to be as close to the suction port as possible, ensuring that the worm wheel is as centrally located as possible relative to the scraping assembly. This ensures the synchronicity of the entire scraping assembly when the regulating motor drives the scraping assembly to rotate around the rotation axis through the meshing of the worm and worm wheel. It also improves the force balance along the length of the scraping part when it scrapes the cleaning component, thus ensuring the effective scraping of the cleaning component.

[0024] 5. The lower housing is provided with an opening near the suction port. The worm gear extends into the receiving cavity from the opening and meshes with the worm. The specific structure of the floor brush is reasonably designed so that both the worm and the worm gear are located in the receiving cavity of the floor brush, avoiding the adverse effects of external dirt on the meshing between the worm and the worm gear, and helping to ensure the meshing stability between the worm and the worm gear.

[0025] 6. In the first specific scheme, the rotating shaft is positioned upwards relative to the adjusting motor, with its top end extending upwards beyond the worm. In this case, the bearing is fitted onto the top end of the rotating shaft. In the second specific scheme, the rotating shaft is positioned upwards relative to the adjusting motor, and a support shaft protruding upwards and coaxial with the rotating shaft is provided at the top of the worm. In this case, the bearing is fitted onto the support shaft. In the third specific scheme, the rotating shaft is positioned upwards relative to the adjusting motor, with its top end extending upwards beyond the worm. A support shaft protruding upwards is provided at the top of the worm, and the support shaft is fitted onto the outer circumference of the top end of the rotating shaft. In this case, the bearing is fitted onto the support shaft. A reasonable design of the fit structure between the rotating shaft and the worm ensures that the rotating shaft with the worm can be effectively supported by the bearing, thereby guaranteeing the structural stability of both the worm and the rotating shaft.

[0026] 7. The floor brush is equipped with a water distribution component, which supplies liquid to the cleaning components, allowing them to absorb and wet the cleaning components. The scraping assembly is located at least partially around the water distribution component. Driven by an adjustable motor, the scraping assembly rotates around the water distribution component. By rationally setting the distribution and coordination of the scraping assembly and the water distribution component, at least partially, both can be overlapped in the longitudinal and transverse directions through an internal and external layout. This rationally reduces the longitudinal and transverse installation space required for the scraping assembly and the water distribution component, making the overall structure of the floor brush more compact and facilitating reasonable control of the overall thickness of the floor brush, allowing it to clean in low-ceilinged spaces.

[0027] 8. One of the water distribution component and the scraping assembly is provided with an arc-shaped extension concentric with the worm gear, and the other is provided with an arc-shaped groove that mates with the arc-shaped extension. At least a portion of the arc-shaped extension is inserted into the arc-shaped groove. When the adjusting motor drives the scraping assembly to rotate around the rotation axis through the transmission structure, the arc-shaped extension and the arc-shaped groove move relative to each other. The mate between the arc-shaped extension and the arc-shaped groove guides and limits the rotation of the scraping assembly, thereby improving the motion stability of the scraping assembly and indirectly improving the scraping stability of the cleaning component.

[0028] 9. Since the helix angle of the worm and the helix angle of the worm wheel are equal in magnitude and have the same direction of rotation, a reasonable setting of the helix angle α of the worm ensures, on the one hand, the transmission efficiency between the two, allowing the regulating motor to effectively drive the scraping component to rotate through the meshing of the worm and worm wheel; on the other hand, it ensures the self-locking performance between the two, preventing the scraping component from transmitting the load force borne by the scraping part on the cleaning part to the rotating shaft through the worm wheel and worm, thus ensuring the scraping action of the scraping part on the cleaning part. If the helix angle α of the worm is less than 5°, the transmission efficiency between the worm and worm wheel is low, which is not conducive to meeting the transmission requirements between the regulating motor and the scraping component. If the helix angle α of the worm is greater than 15°, the self-locking performance between the worm and worm wheel is poor, which is not conducive to meeting the requirement of preventing the reverse transmission of the load force.

[0029] 10. The floor brush features a mounting cavity facing the cleaning component. The scraping assembly is rotatably mounted within this cavity. A soft rubber component is positioned between the bottom of the scraping assembly and the lower wall of the mounting cavity to conceal the gap between them. This soft rubber component effectively blocks dirt from entering the gap, preventing it from accumulating and causing odors and mold growth. Furthermore, it prevents dirt buildup from reducing the rotation range of the scraping assembly, thus ensuring effective dirt removal from the cleaning component. When the motor drives the scraping assembly to rotate around its axis, the size of the gap between the scraping assembly and the lower wall of the mounting cavity changes. The rotating scraping assembly causes the soft rubber component to change shape, dynamically matching the size and shape of the gap to better meet the requirements of dirt blocking. Additionally, because the soft rubber component can be constructed in multiple segments, it avoids the formation of wrinkles on its surface that easily trap dirt, compared to existing corrugated stretching components. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the surface cleaning device in Example 1;

[0031] Figure 2 This is a partial structural diagram of the floor brush in Example 1;

[0032] Figure 3 This is a cross-sectional view of the brush along the front-to-back direction in Embodiment 1;

[0033] Figure 4 This is an exploded view of the floor brush body, scraping assembly, adjusting motor, worm gear, bearing, and bracket in Embodiment 1.

[0034] Figure 5 This is a structural diagram of the lower shell in Embodiment 1;

[0035] Figure 6 This is a partial structural diagram of the interior of the brush in Example 1;

[0036] Figure 7 This is a diagram showing the assembly structure of the adjusting motor, worm gear, and bearing in Example 1;

[0037] Figure 8 This is a structural diagram of the cleaning component in Embodiment 1;

[0038] Figure 9 This is a structural diagram showing the assembly of the adjusting motor, worm gear, bearing, and scraping assembly in Embodiment 1.

[0039] Figure 10 This is a cross-sectional view of the structure of the floor brush portion of the smearing assembly in Embodiment 1 along the front-to-back direction when the smearing part comes into contact with the cleaning component.

[0040] Figure 11 for Figure 10 Enlarged view of point A in the middle;

[0041] Figure 12 This is a cross-sectional view of the floor brush portion structure along the front-to-back direction when the scraping part of the scraping assembly in Embodiment 1 is detached from the cleaning component.

[0042] Figure 13 for Figure 12 Enlarged view of point B in the middle;

[0043] Figure 14 This is a diagram showing the assembly structure of the adjusting motor, worm gear, and bearing in Example 2;

[0044] Figure 15 This is a diagram showing the assembly structure of the adjusting motor, worm gear, and bearing in Example 3;

[0045] Figure 16 This is a structural diagram showing the assembly of the adjusting motor, worm gear, bearing, scraping assembly, heating assembly, and connecting rod in Embodiment 4.

[0046] Figure 17 This is a cross-sectional view along the front-to-back direction of the structure of the floor brush portion when the scraping part and the heating component of the scraping assembly in Embodiment 4 come into contact with the cleaning component.

[0047] Figure 18 This is a cross-sectional view of the floor brush portion structure along the front-to-back direction when the scraping part and heating component of the scraping assembly in Embodiment 4 are detached from the cleaning component.

[0048] In the diagram, 10 - surface cleaning device.

[0049] 100-Floor brush, 110-Floor brush body, 111-Upper housing, 112-Lower housing, 113-Receiving cavity, 114-Receiving cavity, 115-Support rib, 116-Mounting hole, 117-Step surface, 118-Mounting cavity, 119-Opening, 120-Cover, 130-Sealing gasket, 140-Soft rubber part, 141-First part, 142-Second part, 143-Third part, 144-Upper connection, 145-Lower connection, 150-Floor scraper, 160-Suction port, 170-Suction channel, 180-Gap, 190-Positioning plate

[0050] 210 - Cleaning component, 220 - Cleaning motor

[0051] 300 - Scraping assembly; 310 - Scraping section; 320 - Arc-shaped main body; 321 - Lug; 322 - Strip section; 323 - Comb teeth; 330 - Scraping strip; 340 - Fixing component; 341 - Arc-shaped extension.

[0052] 410 - Adjusting motor; 411 - Rotating shaft; 412 - Main body; 420 - Worm gear; 421 - Support shaft; 430 - Bearing; 440 - Worm gear section; 441 - Gear teeth; 451 - Bearing housing; 452 - Rib; 460 - Support.

[0053] 500 - Body, 510 - Handle, 520 - Hinge joint

[0054] 600-Control Module

[0055] 710 - Water distribution component, 711 - Arc groove, 712 - Sealing strip

[0056] 800 - Sewage suction assembly, 810 - Blower, 820 - Sewage tank

[0057] 910-Heating assembly, 911-Heating element, 912-Support frame, 920-Connecting rod, 921-Trigger part, 922-Linkage part, 930-Pin rod, 940-Spring. Detailed Implementation

[0058] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," and "bottom," etc., which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device / component 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 the present invention.

[0059] This utility model provides a surface cleaning device, including a floor brush with a housing, a cleaning component on the floor brush, a scraping assembly with a scraping part, and an adjusting motor for driving the scraping assembly to rotate around a rotation axis. The adjusting motor drives the scraping assembly to rotate in reverse so that the scraping part disengages from the cleaning component, and drives the scraping assembly to rotate in the forward direction so that the scraping part contacts the cleaning component. The adjusting motor is axially vertically disposed inside the floor brush and includes a rotating shaft with a worm gear. The end of the rotating shaft extends into the bearing chamber of the housing. The scraping assembly has a worm wheel part that meshes with the worm gear. The worm wheel part is axially horizontal and its central axis coincides with the rotation axis. The adjusting motor drives the scraping assembly to rotate through the meshing worm gear and worm wheel part.

[0060] A well-designed transmission mechanism between the adjusting motor and the scraping assembly allows the vertically oriented adjusting motor to smoothly drive the scraping assembly to rotate reciprocally around its axis via the meshing worm and worm wheel. This enables the scraping part of the assembly to contact or disengage from the cleaning component. The end of the shaft extends into the bearing chamber, radially limiting its position and preventing a cantilever structure. This significantly improves the shaft's radial stability, increasing its ability to withstand reverse torque. It also prevents the scraping assembly from transmitting the force between itself and the cleaning component back to the shaft, which could cause radial displacement or deformation. This ensures the meshing stability between the worm and worm wheel, guaranteeing the structural stability of the scraping assembly when its scraping part contacts the cleaning component. This, in turn, ensures effective scraping of the cleaning component, ultimately guaranteeing its cleaning ability. It prevents reduced cleaning power or excessive water residue after cleaning due to ineffective scraping of the cleaning component, thus improving the user experience.

[0061] The preferred transmission structure between the adjusting motor and the scraping assembly is a worm gear and worm wheel combination. Since the worm wheel only needs to drive the scraping assembly to reciprocate within a small angle range, the worm gear and worm wheel combination is compact and requires less installation space. This avoids interference with other components within the floor brush without increasing its overall size, maintaining a compact structure and allowing for easy control of the brush's dimensions, enabling it to clean in low-ceilinged spaces. Furthermore, the reduction ratio between the worm gear and worm wheel can be set relatively high, eliminating the need for an additional reduction gear. This transmission structure is more suitable for scenarios with limited installation space and also helps reduce production costs. Moreover, the worm gear and worm wheel meshing provides a certain degree of self-locking performance. This self-locking force prevents the scraping assembly from transmitting the force exerted on the cleaning parts in the reverse direction to the rotating shaft through the transmission structure. This avoids the scraping assembly reversing and releasing the cleaning parts due to shaft rotation, ensuring the effective scraping of the cleaning parts by the scraping assembly.

[0062] The present invention will now be described in detail with reference to the embodiments and accompanying drawings. It should be noted that the surface cleaning device of the present invention can be a handheld cleaning machine with a handle and manually operated by the user, such as a handheld floor scrubber, handheld floor mop, handheld vacuum cleaner, etc.; it can also be a cleaning robot with drive wheels, which can control the drive wheels to move according to a pre-written program and control the cleaning components to clean the floor.

[0063] Example 1

[0064] Combination Figures 1 to 13 This utility model provides a handheld surface cleaning device 10, including a body 500 and a floor brush 100. The floor brush 100 is provided with a cleaning component 210, a scraping assembly 300 with a scraping part 310, and an adjusting motor 410 for driving the scraping assembly 300 to rotate around a rotation axis L. The adjusting motor 410 drives the scraping assembly 300 to rotate in reverse so that the scraping part 310 disengages from the cleaning component 210, and the adjusting motor 410 drives the scraping assembly 300 to rotate in the forward direction so that the scraping part 310 contacts the cleaning component 210. The adjusting motor 410 is vertically mounted inside the floor brush 100. The adjusting motor 410 includes a rotating shaft 411 with a worm gear 420. The end of the rotating shaft 411 extends into the bearing chamber 451 on the housing of the floor brush 100. The scraping assembly 300 is provided with a worm wheel 440 that meshes with the worm gear 420. The worm wheel 440 is axially horizontal and its central axis coincides with the rotation axis L. The adjusting motor 410 drives the scraping assembly 300 to rotate through the meshing worm gear 420 and worm wheel 440.

[0065] Combination Figure 2 , Figure 3In this embodiment, the floor brush 100 includes a floor brush body 110 and a cover 120. The cover 120 is detachably mounted on the top side of the front of the floor brush body 110, and the cleaning component 210 is detachably mounted on the front side of the floor brush body 110. When the cover 120 is mounted on the floor brush body 110 and the cleaning component 210 is mounted on the front side of the floor brush body 110, the cover 120 is located above and covers the cleaning component 210. In a specific embodiment, the cover 120 can be detachably mounted on the floor brush body 110 through a detachable fitting structure such as a snap-fit ​​and slot-fit structure. The detachable fitting structure between the cover 120 and the floor brush body 110 can refer to the prior art, and will not be described in detail here. The cleaning motor 220 for driving the cleaning component 210 can be located inside the floor brush body 110 or on the front side of the floor brush body 110. When the cleaning motor 220 is located at the front of the brush body 110, the cleaning component 210 installed at the front of the brush body 110 houses the cleaning motor 220. The cleaning component 210 can be a single roller structure, a double roller structure with front and rear distribution, or a tracked mop structure; the specific structure of the cleaning component 210 is not limited here. The detachable engagement structure between the cleaning component 210 and the brush body 110 can refer to existing technology, and the transmission structure between the cleaning component 210 and the cleaning motor 220 can also refer to existing technology, which will not be elaborated here.

[0066] Combination Figure 1 In this embodiment, the upper end of the body 500 is provided with a handle 510 for the user to hold, and several buttons for user operation can be provided on the handle 510. The lower end of the body 500 is pivotally connected to the rear of the floor brush body 110 through a hinge joint 520, so the body 500 can not only swing back and forth relative to the floor brush 100, but also rotate left and right relative to the floor brush 100.

[0067] Combination Figure 4 In this embodiment, the floor brush body 110 includes an upper shell 111 and a lower shell 112 fixedly fastened together. The lower shell 112 has a suction port 160 located at its center in the left-right direction, meaning the suction port 160 is centrally located relative to the lower shell 112. The upper shell 111 and lower shell 112 cooperate to form a receiving cavity 113 that is separated from the suction port 160. The adjusting motor 410 is vertically positioned within the receiving cavity 113 of the floor brush body 110. This prevents the adjusting motor 410 from encountering water or dust, ensuring the performance stability of the adjusting motor 410. Correspondingly, the worm gear 420 and the worm wheel 440 are also located within the receiving cavity 113, ensuring the meshing stability between the worm gear 420 and the worm wheel 440.

[0068] Furthermore, the adjusting motor 410 preferably has its shaft 411 facing upwards, with the top of the shaft 411 supported by a bearing 430 that is subject to limiting. This reduces the assembly difficulty of the adjusting motor 410 and lowers its center of gravity, improving the meshing stability between the worm 420 and the worm wheel 440, resulting in a more compact structure. The bearing 430 also prevents a cantilever at the top of the shaft 411, enhancing its structural stability.

[0069] Combination Figure 5 In this embodiment, the lower housing 112 has an upward-facing receiving cavity 114 for mounting the regulating motor 410. The receiving cavity 114 is connected to the accommodating cavity 113. The main body 412 of the regulating motor 410 is inserted into the receiving cavity 114, and the main body 412 of the regulating motor 410 is locked to the lower housing 112 by screws, thereby completely limiting the main body 412 of the regulating motor 410 and maintaining structural stability. Furthermore, the receiving cavity 114 is positioned as close as possible to the suction port 160, so that the worm 420 and the worm wheel 440 can be positioned as close as possible to the suction port 160. This allows the worm wheel 440 to be positioned as centrally as possible relative to the scraping assembly 300, thereby ensuring the overall motion synchronization of the scraping assembly 300 when the adjusting motor 410 drives the scraping assembly 300 to rotate around the rotation axis L through the meshing of the worm 420 and the worm wheel 440. In addition, it can also improve the force balance of the scraping part 310 in the length direction when scraping the cleaning part 210, thereby ensuring the scraping effect of the scraping part 310 on the cleaning part 210.

[0070] In this embodiment, the receiving cavity 114 is provided with a plurality of circumferentially spaced support ribs 115. The support ribs 115 protrude radially toward the center of the receiving cavity 114 relative to the inner wall of the receiving cavity 114, and the support ribs 115 extend a certain height along the axial direction of the receiving cavity 114. The support ribs 115 can be configured as a stepped shape that is narrower at the top and wider at the bottom. The main body 412 of the adjusting motor 410 can be mounted in the receiving cavity 114 through the support ribs 115, so that the main body 412 of the adjusting motor 410 does not contact the inner wall and bottom wall of the receiving cavity 114, which is beneficial to the heat dissipation of the adjusting motor 410. Of course, the specific structure of the support ribs 115 is not limited to the foregoing description and the figures shown, and can be configured in other reasonable ways; or, the setting of the support ribs 115 in the receiving cavity 114 can be omitted.

[0071] Combination Figure 6 , Figure 7In this embodiment, the rotating shaft 411 protrudes upwards relative to the main body 412 by a certain height. The worm gear 420 is separately formed from the rotating shaft 411. The worm gear 420 is sleeved on the rotating shaft 411 through a non-circular shaft hole fitting structure and is located above the main body 412. When the adjusting motor 410 is working, the rotating shaft 411 drives the worm gear 420 to rotate synchronously. The top end of the rotating shaft 411 is cylindrical and extends upwards relative to the top surface of the worm gear 420 by a certain height. The bearing 430 is axially positioned and sleeved on the top end of the rotating shaft 411. Furthermore, the upper housing 111 is provided with a bearing chamber 451, and the bearing 430 located at the top end of the rotating shaft 411 is housed in the bearing chamber 451.

[0072] Combination Figure 4 , Figure 6In this embodiment, the upper housing 111 is fixed with a bracket 460, and the bearing chamber 451 is disposed on the bracket 460. The bracket 460 can be made of the same material as the upper housing 111, or it can be made of a material with higher strength than the upper housing 111. Reasonably designing the formation of the bearing chamber 451 reduces the molding difficulty of the bearing chamber 451 and also improves the structural strength of the bearing chamber 451 by increasing the structural strength of the bracket 460. This ensures that the structural strength of the bearing chamber 451 meets the positioning requirements of the rotating shaft 411, preventing damage to the bearing chamber 451 due to excessive load on the rotating shaft 411. Furthermore, if the bearing chamber 451 is damaged due to excessive load on the rotating shaft 411, only the bracket 460 needs to be replaced, greatly reducing maintenance costs and preventing the entire machine from becoming unusable due to damage to the bearing chamber 451, thus improving the user experience. Furthermore, the upper housing 111 is provided with mounting holes 116 for mounting bracket 460. The bracket 460 is vertically positioned and embedded in the mounting holes 116 and locked to the upper housing 111 by screws. The top surface of the bracket 460 is basically flush with or slightly lower than the upper surface of the upper housing 111. Specifically, the bracket 460 adopts a structure that is larger at the top and smaller at the bottom, with the lower part being a hollow cylinder and the upper part being a T-shaped non-cylindrical shape. Correspondingly, the mounting hole 116 is a hole that is larger at the top and smaller at the bottom, with the lower part being a circular hole and the upper part being a non-circular hole that fits the upper part of the bracket 460. A stepped surface 117 is formed on the wall of the mounting hole 116 between the upper and lower parts. The lower part of the bracket 460 is inserted into the lower part of the mounting hole 116, and the lower parts of the two have a circular cross-section fitting structure in the horizontal direction. The upper part of the bracket 460 is embedded in the upper part of the mounting hole 116, and the upper parts of the two have a T-shaped non-circular cross-section fitting structure in the horizontal direction. The lower surface of the upper part of the bracket 460 abuts against the stepped surface 117 on the wall of the mounting hole 116, so that the bracket 460 is vertically supported. The non-circular cross-section fit structure between the upper part of the bracket 460 and the upper part of the mounting hole 116 provides simultaneous circumferential and radial restraint to the bracket 460, improving the structural stability of the bracket 460 relative to the upper housing 111. This, in turn, enhances the structural stability of the bearing 430 and the shaft 411, preventing radial offset or circumferential rotation of the bracket 460 relative to the upper housing 111. In other embodiments of this invention, the upper part of the bracket 460 and the upper part of the mounting hole 116 may also employ a Y-shaped, elliptical, rectangular, or other suitable non-circular cross-section fit structure. In other specific embodiments of this invention, the bearing chamber 451 may also be directly formed at the bottom of the upper housing 111.

[0073] In this embodiment, the height of the bearing chamber 451 is greater than the thickness of the bearing 430. The bearing chamber 451 contains several circumferentially spaced ribs 452. Each rib 452 protrudes radially toward the center of the bearing chamber 451 relative to its inner wall and extends axially to a certain height. The ribs 452 can be stepped, wider at the top and narrower at the bottom. The bearing 430 is housed in the lower part of the bearing chamber 451 and located on the inner circumference of the ribs 452. The outer ring of the bearing 430 abuts against the step of the ribs 452. Of course, the specific structure of the ribs 452 is not limited to those described above and in the accompanying drawings; other reasonable structures can also be used. Alternatively, the ribs 452 within the bearing chamber 451 can be omitted.

[0074] Combination Figure 10 In this embodiment, a forward-opening mounting cavity 118 is formed on the front side of the lower housing 112. The mounting cavity 118 is located behind the cleaning component 210 and above the suction port 160. The scraping assembly 300 is rotatably disposed within the mounting cavity 118. The lower housing 112 has a through-hole 119 on the rear wall of the mounting cavity 118, near the suction port 160. The worm gear portion 440 is disposed on the rear side of the scraping assembly 300 and extends into the receiving cavity 113 from the through-hole 119. Figure 8 , Figure 9 Specifically, the scraping assembly 300 includes an arc-shaped main body 320 with a cross-sectional shape that is approximately arc-shaped along its length. A worm gear portion 440 is disposed on the outer surface of the arc-shaped main body 320 and has several teeth 441. The worm gear portion 440 and the arc-shaped main body 320 can be integrally formed or separately formed and then fixed together. The centerline of the arc-shaped main body 320 coincides with the rotation axis L of the scraping assembly 300. Both ends of the arc-shaped main body 320 are provided with lugs 321 with holes. Bearing-bearing shafts are provided on the left and right side walls of the mounting cavity 118. The bearing-bearing shafts are inserted into the holes on the lugs 321, thereby allowing the scraping assembly 300 to be rotatably disposed in the mounting cavity 118. The rotation axis L of the scraping assembly 300 is determined by the centerline of the shafts.

[0075] Combination Figure 7 , Figure 8The helix angle α of the worm 420 and the helix angle β of the teeth 441 of the worm wheel 440 are equal in magnitude and have the same direction of rotation. When α and β are larger, the transmission efficiency between the worm 420 and the worm wheel 440 is higher, but the self-locking performance between them is poorer. When α and β are smaller, the self-locking force between the worm 420 and the worm wheel 440 is greater, but the transmission efficiency is lower. To balance the transmission efficiency and self-locking performance between the worm 420 and the worm wheel 440, the values ​​of α and β need to be set appropriately. In this embodiment, α and β are set to 5° to 15°. On the one hand, this ensures that there is appropriate transmission efficiency between the worm 420 and the worm wheel 440, guaranteeing the amplitude of the scraping assembly 300 when it reciprocates with fewer teeth 441 on the worm wheel 440. On the other hand, this ensures that there is appropriate self-locking force between the worm 420 and the worm wheel 440, preventing the scraping assembly 300 from transmitting the load force borne by the scraping part 310 on the cleaning part 210 to the rotating shaft 411 in the opposite direction through the worm wheel 440 and the worm 420. This ensures the structural stability of the scraping assembly 300 when the scraping part 310 scrapes the cleaning part 210.

[0076] In this embodiment, the lower end of the arc-shaped main body 320 extends forward to form a strip-shaped portion 322, and the strip-shaped portion 322 is provided with a plurality of comb teeth 323 spaced apart along the length direction. In addition, a scraper 330 is fixed to the top side of the strip-shaped portion 322, and the front end of the scraper 330 protrudes from the front surface of the strip-shaped portion 322. The comb teeth 323 and the scraper 330 combine to form the scraping portion 310 of the scraping assembly 300. In an alternative embodiment, the scraping portion 310 of the scraping assembly 300 can also adopt a double comb tooth structure. In this case, two rows of staggered comb teeth are provided on the front side of the strip-shaped portion 322. Of course, the scraping portion 310 can also adopt other reasonable structures as long as they meet the scraping requirements of the cleaning component 210. This embodiment does not impose too many restrictions on the specific structure of the scraping portion 310.

[0077] Combination Figure 10 In this embodiment, the mounting cavity 118 of the floor brush 100 is further provided with a water distribution component 710 for supplying liquid to the cleaning component 210. The water distribution component 710 has multiple water outlets spaced apart in the left-right direction, with the water outlets facing the cleaning component 210. The cleaning component 210 flowing into the water distribution component 710 can be sprayed onto the cleaning component 210 through the water outlets, so that the cleaning component 210 absorbs liquid and becomes wetted. As a specific solution of this embodiment, the water distribution component 710 can adopt the existing technology of dividing a water inlet channel into 2 N The structure divides the water into multiple outlet channels in a manner that (N is a natural number). Of course, the water distribution component 710 can also adopt other structures that meet the liquid supply requirements.

[0078] In this embodiment, the scraping component 300 is preferably disposed on at least a portion of the periphery of the water distribution component 710, and the scraping component 300, driven by the adjusting motor 410, rotates around the water distribution component 710. By reasonably setting the distribution and cooperation relationship between the scraping component 300 and the water distribution component 710, at least a portion of the scraping component 300 and the water distribution component 710 can be overlapped in the longitudinal and transverse directions through an internal and external layout. This reasonably reduces the longitudinal and transverse installation space required for the scraping component 300 and the water distribution component 710, thereby making the overall structure of the floor brush 100 more compact and facilitating reasonable control of the overall thickness of the floor brush 100, allowing the floor brush 100 to enter low-ceilinged spaces for cleaning. Furthermore, a sealing gasket 130 is provided between the top side of the water distribution component 710 and the upper cavity wall of the mounting cavity 118. The outer contour of the lower part of the water distribution component 710 is set into an arc shape that is basically concentric with the arc-shaped main body 320 of the scraping assembly 300. The arc-shaped main body 320 is located on the outer periphery of the lower part of the water distribution component 710. The arc-shaped main body 320 and the lower part of the water distribution component 710 are basically concentrically arranged so that the scraping assembly 300 can reciprocate relative to the water distribution component 710.

[0079] Furthermore, the scraping assembly 300 also includes a fixing member 340 for fixing the scraper 330 to the top side of the strip-shaped portion 322. The fixing member 340 has an upwardly extending arc-shaped extension 341, the center line of which coincides with the rotation axis L of the scraping assembly 300. That is, the arc-shaped main body 320, the arc-shaped extension 341, and the worm gear portion 440 are concentrically arranged. The front side of the water distribution member 710 has an arc-shaped groove 711 that mates with the arc-shaped extension 341. The arc-shaped groove 711 and the arc-shaped extension 341 are concentrically arranged. At least a portion of the arc-shaped extension 341 is always inserted into the arc-shaped groove 711. When the adjusting motor 410 drives the scraping assembly 300 to rotate around the rotation axis L through the cooperation of the worm 420 and the worm gear portion 430, the arc-shaped extension 341 moves relative to the arc-shaped groove 711. The arc-shaped extension 341 and the arc-shaped groove 711 cooperate to guide and limit the rotation of the scraping assembly 300, thereby improving the movement stability of the scraping assembly 300 and indirectly improving the scraping stability of the cleaning component 210. Furthermore, to prevent dirt from entering the gap between the arc-shaped extension 341 and the arc-shaped groove 711, the water distribution component 710 has a sealing strip 712 located on the front side of the arc-shaped groove 711. The sealing strip 712 is elastic, and its lower end is bent backward and abuts against the front surface of the arc-shaped extension 341. The contact between the lower end of the sealing strip 712 and the front surface of the arc-shaped extension 341 seals the gap between the front groove wall of the arc-shaped groove 711 and the front surface of the arc-shaped extension 341, preventing dirt from entering the arc-shaped groove 711. In an alternative embodiment, the positions of the arc-shaped extension 341 and the arc-shaped groove 711 can be interchanged. That is, the arc-shaped extension 341 is located on the front side of the water distribution component 710, and the arc-shaped groove 711 is located on the front end of the scraping assembly 300. Correspondingly, the sealing strip 712 is located on the front side of the scraping assembly 300.

[0080] Combination Figure 11In this embodiment, to allow the scraping assembly 300 to rotate smoothly within the mounting cavity 118, a certain gap is provided between the scraping assembly 300 and the lower cavity wall of the mounting cavity 118 to prevent the lower cavity wall of the mounting cavity 118 from interfering with the rotation of the scraping assembly 300. To prevent dirt from entering the mounting cavity 118, a soft rubber part 140 is provided between the bottom surface of the scraping assembly 300 and the lower cavity wall of the mounting cavity 118 to cover the gap between them. When the scraping assembly 300 rotates, it will cause the soft rubber part 140 to change shape, so that the shape of the soft rubber part 140 can dynamically match the size and shape of the gap, thereby making the soft rubber part 140 better meet the requirements of blocking dirt. Specifically, the soft rubber component 140 includes a first part 141, a second part 142, and a third part 143 connected sequentially. The first part 141 can be fixed to the front end of the arc-shaped main body 320 by overmolding. The third part 143 can be fixed to the front side of the positioning plate 190 by overmolding. The upper end of the second part 142 is thinned at the connection with the first part 141 to form an easily deformable upper connection 144. The lower end of the second part 142 is thinned at the connection with the third part 143 to form an easily deformable lower connection 145. The upper connection 144 and the lower connection 145 can form a structure similar to a folding shaft, allowing the first part 141 and the second part 142 to be folded or unfolded relative to each other, and also allowing the third part 143 and the second part 142 to be folded or unfolded relative to each other.

[0081] In this example, a floor scraper 150 is provided at the leading edge of the bottom side of the lower housing 112, located below the suction port 160. The floor scraper 150 is elastic and its lower edge can contact the ground.

[0082] In this embodiment, the surface cleaning device 10 also includes a clean water tank for holding the cleaning solution. The cleaning solution in the clean water tank can flow to the water distribution component 710 through the supply pipeline under the pumping action of the pump. The cleaning solution flowing into the water distribution component 710 can be sprayed onto the cleaning component 210 from the water outlet. The clean water tank can be detachably installed on the front or rear side of the body 500, or it can be integrated with the cover 120 of the floor brush 100. There are no major restrictions on the specific structure and installation position of the clean water tank. Furthermore, a heating module or an electrolysis module can be installed on the supply pipeline. The heating module is used to heat the cleaning solution flowing to the water distribution component 710, and the electrolysis module is used to electrolyze the cleaning solution flowing to the water distribution component 710 and can generate hydroxyl radicals (·OH).

[0083] In this embodiment, the surface cleaning device 10 further includes a suction assembly 800, which includes a blower 810 and a wastewater tank 820. The wastewater tank 820 is detachably mounted on the body 500. A suction channel 170 for connecting the suction port 160 and the wastewater tank 820 is provided between the lower end of the body 500 and the floor brush body 110. The specific structure of the wastewater tank 820 can refer to the prior art and will not be described in detail here. The blower 810 can be located inside the upper end of the body 500, or it can be used together with the battery pack for power supply as a component of the suction power source assembly. The suction power source is detachably mounted on the body 500. The suction power source assembly detached from the body 500 can be connected to a separate vacuuming accessory for dry vacuuming. When the blower 810 is working, it provides suction to create a negative pressure inside the sewage tank 820 and forms a suction airflow from the suction port 160 into the sewage tank 820. The dirt at the suction port 160 can flow into the sewage tank 820 with the suction airflow, thus achieving the collection of dirt.

[0084] In this embodiment, a control module 600 is provided inside the body 500, and electrical components such as the cleaning motor 220, the regulating motor 410, and the fan 810 are controlled by the control module 600.

[0085] Combination Figure 10 , Figure 11 When the adjusting motor 410 drives the scraping assembly 300 to rotate clockwise in the +ω direction through the meshing of the worm gear 420 and the worm wheel 440, the comb teeth 323 of the scraping part 310 extend into the tufts of hair on the outer surface of the cleaning part 210, and the front end of the scraper 330 comes into tight contact with the cleaning part 210. At this time, the second part 142 of the soft rubber part 140 is exposed at the bottom of the scraping assembly 300 and is in an unfolded state. When the cleaning part 210 is working, the comb teeth 323 comb the tufts of hair on the cleaning part 210 to remove hair and other dirt adsorbed on the cleaning part 210, and the front end of the scraper 330 scrapes and squeezes the cleaning part 210 to squeeze out the dirt absorbed by the cleaning part 210. The cleaning component 210, the scraping part 310, the floor scraper 150, and the ground combine to form a negative pressure area connected to the suction port 160. The dirt squeezed out by the scraping part 310 can be sucked away through the suction port 160. During the operation of the device, some dirt can easily get stuck between the scraping part 310 and the cleaning component 210, and some dirt will accumulate on top of the scraping part 310.

[0086] Combination Figure 12 , Figure 13When the surface cleaning device 10 finishes working, or when the cleaning component 210 performs self-cleaning, or when the cleaning component 210 is detected to be rotating with resistance, the adjusting motor 410 can drive the scraping assembly 300 to reverse a certain angle in the direction indicated by -ω through the meshing of the worm gear 420 and the worm wheel 440. When the scraping assembly 300 is reversed to its original position, the second part 142 of the soft rubber part 140 folds at the bottom of the strip part 322, the scraping part 310 of the scraping assembly 300 disengages from the cleaning component 210, and a gap 180 of a certain width is formed between the two. The dirt stuck between the scraping part 310 and the cleaning component 210 is loosened and can be sucked away through the suction port 160. The dirt accumulated above the scraping part 310 can also be sucked away through the gap 180 and the suction port 160. After cleaning is completed, the adjusting motor 410 drives the scraping assembly 300 to rotate clockwise in the direction indicated by +ω to reset to the state where the scraping part 310 is in contact with the cleaning component 210.

[0087] In other embodiments of this invention, the shaft 411 of the regulating motor 410 can also be positioned downwards. In this case, the worm gear 420 is located below the main body 412 of the regulating motor 410. The receiving cavity 114 for mounting the regulating motor 410 is located at the bottom of the upper housing 111 and has an opening facing downwards. The bearing chamber 451 for accommodating the bearing 430 is located on the lower housing 112 and has an opening facing upwards.

[0088] Example 2

[0089] Combination Figure 14 In this embodiment, the axial length of the rotating shaft 411 is less than the axial length of the worm 420. The top of the worm 420 is provided with an upwardly protruding support shaft 421. The support shaft 421 is concentrically arranged with the rotating shaft 411. The bearing 430 is sleeved on the support shaft 421 and housed in the bearing chamber.

[0090] In the specific solution of this embodiment, the worm gear 420 can be integrally formed with the rotating shaft 411 by overmolding, or it can be sleeved on the rotating shaft 411 by a non-circular shaft hole fitting structure. Of course, the worm gear 420 and the rotating shaft 411 can also be combined together by other assembly methods that meet the requirements.

[0091] The other contents of Example 2 are the same as those of Example 1, and will not be repeated here.

[0092] Example 3

[0093] Combination Figure 15 In this embodiment, the upper end of the rotating shaft 411 extends upward beyond the upper surface of the worm 420. The top of the worm 420 is provided with an upwardly protruding support shaft 421. The support shaft 421 is sleeved on the outer periphery of the top end of the rotating shaft 411. The support shaft 421 and the rotating shaft 411 are concentrically arranged. The bearing 430 is sleeved on the support shaft 421 and is housed in the bearing chamber.

[0094] In the specific solution of this embodiment, the worm gear 420 can be integrally formed with the rotating shaft 411 by overmolding, or it can be sleeved on the rotating shaft 411 by a non-circular shaft hole fitting structure. Of course, the worm gear 420 and the rotating shaft 411 can also be combined together by other assembly methods that meet the requirements.

[0095] The other contents of Example 3 are the same as those of Example 1, and will not be repeated here.

[0096] Example 4

[0097] Combination Figure 16 , Figure 17 , Figure 18 In this embodiment, the floor brush 100 is equipped with a heating component 910 located on top of the cleaning component 210. The heating component 910 can heat the cleaning component 210 that has been wetted by the liquid. The suction port 160, the scraping part 310 of the scraping component 300, the water outlet of the water distribution component 710 and the heating component 910 are arranged sequentially from upstream to downstream along the rotation direction of the cleaning component 210 when it is working. This minimizes the path length of the cleaning component 210 from the location of the heating component 910 to when it contacts the ground, thereby increasing the temperature of the cleaning component 210 when it contacts the ground, and thus improving the cleaning ability of the cleaning component 210 on the ground.

[0098] The heating assembly 910 includes a heating element 911 and a support frame 912 for mounting the heating element 911. When the heating assembly 910 heats the liquid-wetted cleaning component 210, the heating element 911 of the heating assembly 910 is in close contact with the cleaning component 210. This causes some dirt adsorbed by the cleaning component 210 to easily get stuck between the heating element 911 and the cleaning component 210, and it accumulates over time. In order to clean the dirt stuck between the heating element 911 and the cleaning component 210, the heating element 911 is preferably positioned above the cleaning component 210 and can float up and down via the support frame 912. When it is necessary to heat the cleaning component 210, the heating element 911 is in a lower position relative to the support frame 912 and is in close contact with the cleaning component 210. When it is necessary to clean the dirt stuck between the heating element 911 and the cleaning element 210, the heating element 910 moves upward to a higher position and disengages from the cleaning element 210, thereby forming a certain gap between the heating element 910 and the cleaning element 210, thereby loosening the stuck dirt and allowing the dirt to be sucked away through the suction port 160.

[0099] To make the overall structure of the floor brush 100 more compact and to reduce the overall production cost, in this embodiment, the scraping assembly 300 and the heating assembly 910 are linked. Specifically, the front end of the upper housing 111 extends forward a certain distance relative to the water distribution component 710. The heating assembly 910 is located at the bottom of the front end of the upper housing 111. A rotatable connecting rod 920 is provided inside the front part of the floor brush body 110. The connecting rod 920 can swing vertically inside the floor brush body via a pin 930, and the connecting rod 920 can swing back and forth around the pin 930. Specifically, the connecting rod 920 has a trigger part 921 extending toward the rear end of the scraping assembly 300. The lower end of the trigger part 921 is located on the front side of the rear end of the scraping assembly 300. The connecting rod 920 also has a linkage part 922 extending toward the heating assembly 910. The front end of the linkage part 922 is movably connected to the movable part of the heating assembly 910, which includes the heating element 911. A spring 940 is provided between the front end of the upper housing 111 and the movable part of the heating assembly 910 to bias the movable part downward.

[0100] Combination Figure 17 , Figure 18 When the adjusting motor 410 drives the scraping assembly 300 to reverse in the direction shown in -ω and disengage from the cleaning component 210 through the meshing of the worm gear 420 and the worm wheel 440, the scraping assembly 300 abuts against the trigger part 921 of the connecting rod 920, causing the connecting rod 920 to swing. The trigger part 921 of the connecting rod 920 swings downward and the linkage part 922 swings upward. The upward swinging linkage part 922 drives the movable part of the heating assembly 910 to overcome the bias of the spring 940 and move upward, thereby causing the heating component 911 to move upward. The upper movement disengages from the cleaning component 210, and a gap of a certain height can be formed between the heating component 911 and the cleaning component 210. At the same time, the scraping part 310 disengages from the cleaning component 210, and a gap 180 of a certain width is formed between the two. The dirt stuck between the heating component 911 and the cleaning component 210 is loosened and can be sucked away through the gap 180 and the suction port. The dirt stuck between the scraping part 310 and the cleaning component 210 or the dirt accumulated above the scraping part 310 can also be sucked away through the suction port.

[0101] When the adjusting motor 410 drives the scraping assembly 300 to rotate clockwise in the direction indicated by +ω through the meshing of the worm gear 420 and the worm wheel 440, causing the scraping part 310 to come into contact with the cleaning part 210, the scraping assembly 300 releases the trigger part 921 of the connecting rod 920, and the spring 940, which restores its deformation, drives the movable part of the heating assembly 910 to move downward, thereby causing the heating part 911 to re-fit with the cleaning part 210. At the same time, the linkage part 922 of the connecting rod 920 swings downward, and the trigger part 921 of the connecting rod 920 swings upward to reset due to the lever structure of the connecting rod.

[0102] The other contents of Example 4 are the same as those of Example 1, and will not be repeated here.

[0103] In addition to the preferred embodiments described above, there are other embodiments of this utility model. Those skilled in the art can make various changes and modifications based on this utility model. As long as they do not depart from the spirit of this utility model, they should all fall within the scope defined in the claims of this utility model.

Claims

1. A surface cleaning device, comprising a floor brush with a housing, a cleaning element on the floor brush, a scraping assembly with a scraping portion, and an adjusting motor for driving the scraping assembly to rotate about a rotation axis; the adjusting motor drives the scraping assembly to rotate in reverse so that the scraping portion disengages from the cleaning element, and the adjusting motor drives the scraping assembly to rotate in the forward direction so that the scraping portion contacts the cleaning element, characterized in that, The adjusting motor is vertically mounted inside the floor brush. The adjusting motor includes a rotating shaft with a worm gear. The end of the rotating shaft extends into the bearing chamber of the housing. The scraping assembly is provided with a worm wheel that meshes with the worm gear. The worm wheel is axially horizontal and its central axis coincides with the rotation axis. The adjusting motor drives the scraping assembly to rotate through the meshing worm gear and worm wheel.

2. The surface cleaning device according to claim 1, characterized in that, The floor brush housing includes an upper housing and a lower housing that are fixedly fastened together to form a receiving cavity. The adjusting motor is vertically positioned within the receiving cavity, and the bearing chamber is located at the bottom of the upper housing.

3. The surface cleaning device according to claim 2, characterized in that, The upper housing is fixed with a bracket, and the bearing chamber is located on the bracket. The bracket and the upper housing adopt a non-circular cross-section mating structure in the transverse direction.

4. A surface cleaning device according to claim 2, characterized in that, The lower housing has a centrally located suction port on the left and right, and a receiving cavity for installing an adjustment motor, which is located near the suction port.

5. A surface cleaning device according to claim 4, characterized in that, The lower housing has an opening near the suction port, and the worm gear extends into the receiving cavity from the opening and meshes with the worm.

6. A surface cleaning device according to claim 1, characterized in that, The rotating shaft is positioned upwards with its top end extending upwards beyond the worm gear, and a bearing adapted to the bearing housing is fitted onto the top end of the rotating shaft; alternatively, the rotating shaft is positioned upwards, and the top of the worm gear has an upwardly protruding support shaft that is coaxial with the rotating shaft, and a bearing adapted to the bearing housing is fitted onto the support shaft; alternatively, the rotating shaft is positioned upwards with its top end extending upwards beyond the worm gear, and the top of the worm gear has an upwardly protruding support shaft that is fitted onto the outer periphery of the top end of the rotating shaft, and a bearing adapted to the bearing housing is fitted onto the support shaft.

7. A surface cleaning device according to claim 1, characterized in that, The floor brush is also provided with at least a water distribution component for supplying liquid to the cleaning components, and a smear scraping component is located at least partially around the water distribution component. The smear scraping component is driven by an adjusting motor to rotate around the water distribution component.

8. A surface cleaning device according to claim 7, characterized in that, One of the water distribution component and the sludge scraping assembly is provided with an arc-shaped extension concentric with the worm gear portion, and the other is provided with an arc-shaped groove that cooperates with the arc-shaped extension portion. At least a portion of the arc-shaped extension portion is inserted into the arc-shaped groove. The sludge scraping assembly driven by the adjusting motor causes the arc-shaped extension portion and the arc-shaped groove to move relative to each other.

9. A surface cleaning device according to claim 1, characterized in that, The thread helix angle α of the worm gear is 5° to 15°.

10. A surface cleaning device according to claim 1, characterized in that, The floor brush has a mounting cavity facing the cleaning component. The scraping component is rotatably mounted in the mounting cavity. A soft rubber component is provided between the bottom surface of the scraping component and the lower cavity wall of the mounting cavity to cover the gap between the two. The scraping component rotates under drive, causing the soft rubber component to change shape.

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