Water pump assembly and scrubbing device

Abstract

The invention is suitable for the technical field of cleaning equipment, and discloses a water pump assembly which is installed on a scrubbing device with a scrubbing head and comprises a shell, a support, a water pump and a rear end cover, the shell is hollow and provided with a cavity, the end, close to the scrubbing head, of the cavity is a water outlet opening end, the other end of the cavity is an electricity taking opening, and the electricity taking opening is detachably connected with a front end cover. The electrode structure exposed out of the front end cover is close to the output end of the battery component in the handle; the axial middle part of the bracket is hollow to form a through space, one end of the bracket is detachably connected with the power taking opening, and the other end seals the water outlet opening end; the water pump is installed in the through space and comprises a water inlet and outlet end and a power connection end, and the water inlet and outlet end is provided with a water inlet and a water outlet. The rear end cover is detachably connected with the water outlet opening end, the water inlet and outlet end partially penetrates out of the rear end cover and is close to the scrubbing head, and the rear end cover is provided with a through structure for a pipeline connected with a water inlet and a water outlet of a water pump at the water inlet and outlet end to pass through; the shell, the support and the rear end cover are installed and combined together, and the water pump is sealed in the shell.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202410291415.2 entitled "A Water Pump Assembly and Scrubbing Device", the contents of which are incorporated herein by reference. Technical Field

[0002] This invention relates to the field of cleaning equipment technology, and more particularly to a water pump assembly and a scrubbing device. Background Technology

[0003] Traditional car wash equipment often occupies space large enough to accommodate a whole car. The washing process involves spraying water and cleaning solution onto the vehicle body and using large mechanical rollers to scrub and rinse it. The entire car wash equipment is bulky, consumes a lot of water and electricity, and is noisy. In recent years, with the popularization of floor scrubbers, portable scrubbing devices have emerged, evolving from "water and dust circulation" floor scrubbers. The portable scrubbing device uses a motor to drive a cleaning drum to wipe the car body. The portable scrubbing device is also equipped with a water supply system and a water tank to clean the cleaning drum, thus perfectly cleaning the car body.

[0004] Existing portable "water-dust circulation" scrubbing devices can continuously scrub vehicle surfaces. However, the installation of the built-in water pump is relatively complex, requiring cumbersome power supply and control circuitry for the pump, as well as piping to draw clean water from the water supply system and deliver it to the cleaning rollers of the scrubbing device. Furthermore, the water pump is merely a liquid delivery component installed inside the scrubbing device's housing; it does not provide support for the housing and is susceptible to damage from external vibrations, which can shorten its lifespan. Summary of the Invention

[0005] The main technical problem solved by this invention is to provide a water pump assembly and a scrubbing device to reduce the difficulty of arranging the internal control circuit and water pump suction and delivery pipeline of the scrubbing device. This invention also improves the vibration resistance of the water pump assembly, extends the service life of the water pump built into the scrubbing device, and improves the overall structural rigidity of the scrubbing device by strengthening the mutual support positions of the housing of the water pump assembly and the housing of the scrubbing device.

[0006] To address the aforementioned problems, in a first aspect, the present invention provides a water pump assembly, installed in a scrubbing device having a scrubbing head, comprising:

[0007] The shell is hollow and has a cavity with openings at both ends. The end closer to the scrubbing head is the water outlet, and the end further away from the scrubbing head is the power supply opening. The power supply opening is detachably connected to a front cover, and the electrode structure exposed on the front cover is close to the output end of the battery assembly inside the handle.

[0008] The bracket is hollow in the middle of its axis, forming a through space. One end of the bracket is detachably connected to the power supply opening, and the other end is closed to the water outlet opening.

[0009] A water pump is installed in a through space, including an inlet and outlet end and an electrical connection end. The inlet and outlet end has an inlet and an outlet.

[0010] The rear end cover is detachably connected to the water outlet end. The water inlet and outlet end portions extend through the rear end cover and are close to the scrubbing head. The rear end cover has a through structure for the pipes connected to the water pump inlet and outlet ends to pass through.

[0011] The housing, bracket, and rear cover are assembled together to enclose the water pump inside the housing, making the water pipeline and power supply lines simple and the overall structure of the scrubbing device compact.

[0012] In one or more alternative embodiments, the bracket has a mating end, an open-closed end, and a bracket body connecting the two.

[0013] The support body is semi-cylindrical with the top opening upwards;

[0014] The docking end and the power supply opening are detachably connected;

[0015] The opening and sealing end seals the water outlet opening end, and the opening and sealing end is provided with an opening for the water pump to enter and exit. The rear end cover seals the opening.

[0016] In one or more alternative embodiments, the electrode structure is electrically connected to the power receiving end and is located between the front cover and the power extraction opening. The electrode structure extends out of the front cover to extract power to the outside.

[0017] In one or more alternative embodiments, the pump assembly further includes:

[0018] The control system is installed at the open top of the semi-cylindrical bracket body, electrically connected to the wiring terminals to control the water pump operation, and electrically connected to the electrode structure, which is powered externally.

[0019] In one or more alternative embodiments, the housing has a partition at one end near the front cover that divides the cavity into a receiving cavity and an electrical connection cavity; the receiving cavity contains a support; the electrical connection cavity has an electrode structure; and the partition has a cable outlet for leading out the electrode structure to be electrically connected to the control system.

[0020] In one or more alternative embodiments, the partition plate is further provided with a fixing nut post and an electrode mounting base; the fixing nut post is used to fix the front end cover and seal and fasten the front end cover to the end with the power extraction opening facing outward; the electrode mounting base is used to fix and limit the electrode structure, so that the protruding end of the electrode structure can accurately extend out of the front end cover in order to extract power from the scrubbing device.

[0021] In one or more alternative embodiments, a through hole is provided at the lower center of the partition, and a locking nut is provided at the corresponding position of the mating part and the through hole. By driving a screw through the through hole from the outward side of the partition into the locking nut, the mating end and the power supply opening can be detachably connected, thereby completing the fastening connection between the housing and the bracket at the power supply opening.

[0022] In one or more alternative embodiments, the docking end includes a heat dissipation notch, a wiring notch, and a docking portion. A docking groove is provided at one end of the docking portion facing the power extraction opening of the housing. When the docking portion and the inner wall of the power extraction opening facing the bracket are docked, the docking groove and the protruding rib provided on the inner wall of the power extraction opening are engaged and connected.

[0023] In one or more alternative embodiments, an abutment ring is provided between the water inlet / outlet end and the power connection end of the water pump; the upper half of the connection end is provided with a wiring notch, which is fully open; the lower half of the connection end is provided with a heat dissipation notch, which is partially open; and a snap-fit ​​step is provided on the cylindrical inner wall of the bracket body near the heat dissipation notch, which abuts against the abutment ring of the water pump.

[0024] In one or more alternative embodiments, the snap-fit ​​step divides the through space into a first space for accommodating the electrical terminal and a second space for fixing the inlet and outlet water terminals. The maximum outer diameter of the electrical terminal is smaller than the maximum outer diameter of the inlet and outlet water terminals, and the first space is smaller in the radial direction than the second space.

[0025] In one or more alternative embodiments, the opening closure end is provided with a sealing part extending outward from the cylindrical sidewall perpendicular to the support body. The sealing part closes the water outlet opening end and is provided with a wire through hole, through which the wire harness passes through the sealing part after being electrically connected to the control system and the water pump.

[0026] In one or more alternative embodiments, the through structure includes a through hole for the inlet and outlet water ends to pass through and is provided on the rear end cover, a notch for the wiring harness to electrically connect to the control system and the water pump and then pass through the rear end cover, and a through hole provided on the sealing part.

[0027] In one or more alternative embodiments, the overall outer periphery of the sealing part is rectangular, and the overall shape of the inner wall of the water outlet end of the shell is a rectangle corresponding to the sealing part.

[0028] In one or more alternative embodiments, the overall outer periphery shape of the sealing part is a circle, a regular polygon, or other irregular shape, and the inner wall of the water outlet end of the shell is a circle, a regular polygon, or other irregular shape.

[0029] In one or more alternative embodiments, the bracket body is provided with at least one guide rib parallel to the pump axis to facilitate the bracket sliding into the housing.

[0030] In one or more alternative embodiments, each of the two parallel sides parallel to the pump axis extending upwards from the semi-cylindrical top opening of the bracket body has a mounting rib, and the mounting rib is provided with screw holes for fixing the control system.

[0031] In one or more alternative embodiments, the rear end cover has a through hole and a notch, the through hole allowing the inlet and outlet portions to pass through the rear end cover, and the notch allowing the wiring harness to pass through the rear end cover after being electrically connected to the control system and the water pump.

[0032] In one or more alternative embodiments, the electrode structure includes an electrode cap and a spring for extending the electrode cap. The electrode cap includes a shoulder that limits the position of the extended electrode cap, and the extension and retraction direction of the electrode cap is not in the same straight line as the water pump inlet and outlet direction.

[0033] In one or more alternative embodiments, the extension / retraction direction of the electrode cap forms an acute angle with the water pump inlet / outlet direction.

[0034] In one or more alternative embodiments, the housing is further provided with a light guide structure for guiding the status indicator light source on the control system, the light guide structure including a light guide column.

[0035] In one or more alternative embodiments, the housing is further provided with a button that can resiliently abut against the start / stop button on the control system, the button maintaining the isolation and sealing between the housing and the control system.

[0036] In one or more alternative embodiments, the housing is further provided on both sides for detachable connection with the bottom shell of the scrubbing device.

[0037] In one or more alternative embodiments, at least one sealing ring groove is provided on the peripheral wall of the power access opening of the housing, the sealing ring groove being used to engage the sealing ring.

[0038] In one or more alternative embodiments, the control system includes a first control board and a second control board, which are electrically connected and work together.

[0039] In a second aspect, the present invention provides a cleaning head including a handle and a scrubbing head connected to the handle, a water tank, and a water pump assembly as described in the first aspect, the water pump assembly delivering clean water from the water tank to a cleaning roller on the scrubbing head.

[0040] In summary, the beneficial effects of this invention are:

[0041] The pump assembly's housing, bracket, rear end cover, and front end cover enclose the pump within the housing. This allows the housing, bracket, rear end cover, and front end cover to provide some support under stress, preventing the pump from being impacted by external forces during operation and extending its service life. Simultaneously, an electrode structure is provided between the front end cover and the power access opening in the housing, making it easier for the pump to draw power from external sources. The inlet and outlet ends, partially extending out of the rear end cover, facilitate the connection of pipelines for external water extraction and delivery.

[0042] The extension and retraction direction of the electrode cap of the water pump assembly electrode structure forms an acute angle with the water pump's inlet and outlet directions. This allows the water pump assembly to reliably and elastically connect with the battery assembly inside the scrubbing device handle. It provides sufficient strength support for the entire scrubbing device at the corner where the handle and the body meet, making it convenient for users to hold the handle with one or both hands to clean the surface to be cleaned.

[0043] Because the water pump assembly has a front cover at the end furthest from the scrubbing head, and the electrode structure exposed on the front cover is close to the output end of the battery assembly inside the handle, the water pump inlet and outlet are close to the scrubbing head. The inlet and outlet portions of the water pump extend through the rear cover, resulting in a simpler distribution of water pipes and power lines, and a more compact overall structure for the scrubbing device. Furthermore, the water pump assembly is positioned on two fixed surfaces at both ends through different components, allowing the pump assembly housing to provide some support under stress and extending the overall service life of the scrubbing device. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 in the description only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a three-dimensional structural view of an embodiment of the water pump assembly of the present invention.

[0046] Figure 2 This is a front view of an embodiment of the water pump assembly of the present invention.

[0047] Figure 3 yes Figure 2 Sectional view along the AA direction.

[0048] Figure 4 This is a bottom view of an embodiment of the water pump assembly of the present invention.

[0049] Figure 5 This is an exploded view of an embodiment of the water pump assembly of the present invention.

[0050] Figure 6 yes Figure 5 Enlarged view of a section at point B.

[0051] Figure 7 This is a schematic diagram of the assembly of the control system, water pump, and support in an embodiment of the water pump assembly of the present invention.

[0052] Figure 8 This is a perspective view of the bracket in the embodiment of the water pump assembly.

[0053] Figure 9 This is a perspective view of the rear end cover in an embodiment of the water pump assembly.

[0054] Figure 10 This is an exploded view of another embodiment of the water pump assembly.

[0055] Figure 11 This is an exploded view of an embodiment of a scrubbing device equipped with the water pump assembly of the present invention.

[0056] Explanation of reference numerals in the attached figures:

[0057] 10. Water pump assembly;

[0058] 100. Housing; 101. Partition plate; 101a. Electrode mounting base; 101b. Fixing nut post; 102. Fixing lug; 103. Light guide plug; 103a. Button; 103b. Light shield; 104. Screw; 108. Sealing ring; P. Electrode mounting cavity;

[0059] 200, front end cap; 201, electrode structure; 201a, electrode cap; 201a1, electrical contact tongue; 201b, spring;

[0060] 300. Rear end cover; 300a. Cover body; 300a1. Pump contact surface; 300a2. Maintenance notch; 300a3. Weight reduction hollow area; 300a4. Inlet through hole; 300a5. Outlet through hole; 300a7. Snap-fit ​​pin; 300b. Sealing edge; 301. Cable tray;

[0061] 400, Water pump; 400a, Inlet and outlet; 400b, Electrical connection; 400b1, Electrical contact one; 400b2, Electrical contact two; 400c, Abutment ring; 401, Inlet; 402, Outlet;

[0062] 500, First control board; 500', Second control board; 501a, Positive lead-out point; 501b, Negative lead-out point; 503a, Water pump power supply lead-out point one; 503b, Water pump power supply lead-out point two;

[0063] 600, Bracket; 601, Sealing part; 6011, Wiring notch; 602, Bracket body; 602a, Heat dissipation notch; 602b, Wiring notch; 602b1, Mounting rib; 602b2, Mounting rib; 6021, Guide rib; 603, Connecting part; 603a, Connecting groove; 603b, Locking nut; 604, Sealing ring II;

[0064] 21. Bottom shell of the scrubbing device;

[0065] 22. Upper housing of the scrubbing device; 221. Water tank locking mechanism; 222. Power on / off button;

[0066] 30. Cleaning roller;

[0067] 40. Water tank assembly;

[0068] 50. Battery assembly;

[0069] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0070] The claims of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of the present invention.

[0071] It should be understood that, in the description of the embodiments of the present invention, all directional terms such as "up," "down," "left," "right," "front," and "back" indicate the orientation or positional relationship based on the orientation and positional relationship shown in the accompanying drawings or the orientation or positional relationship commonly used when the product is in use. These terms are only for the purpose of simplifying the description of the present invention and do not explicitly or implicitly suggest that the device, element, or component referred to must have a specific orientation or specific orientational structure, and should not be construed as a limitation of the present invention. They are only used to explain the relative positional relationships and movements between the components shown in the accompanying drawings. When the specific orientation changes, the directional indication may also change accordingly. Regarding processes and methods, unless the specification explicitly states that each step must be performed in sequence, excluding cases where changing the order of steps would prevent the achievement of the corresponding inventive objective, they are all considered to be for the sake of simplicity. The specification only uses the optimal or superior examples selected from various embodiments for illustration.

[0072] Furthermore, in this invention, ordinal numbers such as "first" and "second" are used only for distinguishing purposes and should not be construed as indicating or implying their relative importance or the quantity of the indicated technical features. Thus, the features referred to as "first" and "second" can explicitly or implicitly include at least one of those technical features. In this invention, for ease of explanation, quantifiers such as "one," "two," "multiple," "at least one," or "several" may be used to define technical (structural) features. "Multiple" means at least two, i.e., two or more; "at least one" and "several" mean one or more corresponding technical features. These quantifiers are merely illustrative of specific embodiments or preferred implementations and should be included as long as they do not contradict the overall concept and purpose of the invention, unless explicitly stated that the quantifiers are necessary for implementation or to achieve the intended purpose.

[0073] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," and "screw-in" should be interpreted broadly. For example, they can refer to a relatively fixed positional relationship between components, or a physically fixed connection between components; they can be detachable connections or integral structures; they can be mechanical connections or electrical signal connections; they can be direct connections or indirect connections through intermediate media or components; they can refer to the internal communication of two elements or the interaction between two elements. Unless otherwise explicitly limited in the specification, other interpretations will not achieve the corresponding functions or effects. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0074] If the controllers or control circuits involved in this invention are conventional control technologies or units for those skilled in the art, such as the control circuits of the controllers, they can be implemented by those skilled in the art using existing methods, such as simple programming. Regarding software or programs that work with hardware to achieve control results, unless the description provides a detailed explanation of the control process of the software or programs involved, this pertains to the use of existing technology or conventional techniques for those skilled in the art. The power supply also employs existing technology in the art. Furthermore, since the main inventive aspect of this invention lies in the improvement of the mechanical device, this invention will not provide a detailed explanation of the specific circuit control relationships and circuit connections.

[0075] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention. The present invention will be further described below with reference to specific embodiments, but these are not intended to limit the present invention.

[0076] The applicant discovered that the installation of the built-in water pump in some existing handheld car washers is quite complex. For example, the applicant's Chinese invention patent with publication number CN218141448U discloses a handheld car washer, including a body, a water tank that snaps onto the upper front side of the body, a cleaning head housing that extends outward from the front of the body to snap onto the wiping roller, and a handle connected to the end of the body; the cleaning mechanism is installed inside the cleaning head housing, the pump and part of the delivery pipeline in the cleaning fluid delivery mechanism are installed inside the body, part of the delivery pipeline in the cleaning fluid delivery mechanism and a section of the pipeline in the cleaning fluid delivery mechanism that passes through the wiping roller are installed inside the cleaning head housing, the control circuit board, battery, and display panel of the handheld car washer are installed inside the handle, and the body, cleaning head housing, and handle are all equipped with power harnesses, signal harnesses, and connectors for providing power or transmitting sensor signals to the car wash device.

[0077] The applicant also found that in some other handheld car wash machines, the control circuit board, battery, and display panel were installed inside the handle, and the water pump was installed inside the machine body. The electrical connections between the control circuit board, battery, display panel, and water pump were too complicated, making it inconvenient for mass production and user maintenance and replacement of parts. For example, the applicant's Chinese invention patent with publication number CN218907182U discloses a handheld electric car washer including a body, a water tank that is snapped onto the upper front side of the body, a cleaning head housing that extends outward from the front of the body to snap onto the wiping roller, and a handle connected to the end of the body. The pump and part of the delivery pipeline in the cleaning fluid delivery mechanism are installed inside the body. Part of the delivery pipeline in the cleaning fluid delivery mechanism and a section of the pipeline in the cleaning fluid delivery mechanism that passes through the wiping roller are installed inside the cleaning head housing. The upper part of the cleaning head housing is covered with a body cleaning head cover plate. The control circuit board 6, battery 7, and display panel of the handheld car washer are installed inside the handle. A water tank locking mechanism is provided next to the water tank that is snapped onto the upper surface of the body. A handle locking mechanism is provided next to the connection between the body and the handle. The upper surface of the body is covered with a body connection cover plate, which hides the mechanical locking structure of the handle locking mechanism and the water tank locking mechanism inside the body. Only the button for triggering the locking mechanism is exposed on the upper surface of the body.

[0078] In summary, the applicant concludes that the installation of the pump built into the existing handheld car wash machine is relatively complicated. It also requires cumbersome connections to the circuits that supply power and control the pump, as well as the water path that draws clean water from the water supply system and delivers clean water to the cleaning roller of the washing device. At the same time, the pump is only a component installed inside the housing of the washing device and cannot provide sufficient support for the entire housing of the washing device. It is also easy for the housing of the washing device to be subjected to external vibration, which will shorten the service life of the pump.

[0079] Therefore, in order to reduce the difficulty of arranging the internal control circuit and water pump suction and delivery pipeline of the scrubbing device, to improve the vibration resistance of the internal water pump assembly of the scrubbing device, to extend the service life of the built-in water pump of the scrubbing device, and to improve the overall structural rigidity of the scrubbing device, the applicant further developed and made this invention.

[0080] In a first aspect, the present invention provides a water pump assembly. For example... Figures 1 to 11 As shown, a water pump assembly 10 is installed in a scrubbing device with a scrubbing head. The water pump assembly 10 includes a housing 100, a bracket 600, a water pump 400, a rear end cover 300, and a front end cover 200. The housing 100 is hollow and has a cavity with openings at both ends. The end closer to the scrubbing head is a water outlet (not shown in the figure), and the end farther from the scrubbing head is a power supply opening 101. The bracket 600 is installed in the cavity. The axial center of the bracket 600 is hollow, forming a through space. One end of the bracket 600 is detachably connected to the power supply opening 101, and the other end of the bracket 600 closes the water outlet. The water pump 400 is installed in the through space at the axial center of the bracket 600. The water pump 400 includes inlet and outlet water... The pump has a water inlet 400a and an electrical outlet 400b. The water inlet / outlet 400a has an inlet 401 and an outlet 402, and the electrical outlet 400b has two terminals (not shown in the attached figure). The rear end cover 300 is detachably connected to the outlet end, and the rear end cover 300 has a through structure for the passage of the pipeline connected to the water pump inlet 401 and outlet 402 of the water inlet / outlet 400a. The front end cover 200 is detachably connected to the power outlet 101 to draw power from the outside. The water pump inlet 401 and outlet 402 of the water inlet / outlet 400a extend out of the through structure of the rear end cover 300. The housing 100, the bracket 600, and the rear end cover 300 enclose the water pump 400 within the housing 100.

[0081] Specifically, such as Figure 1 , Figure 2 , Figure 4 As shown, the housing 100 is also provided with fixing ears 102 on both sides for detachable connection with the bottom housing 21 of the scrubbing device. When the user needs to maintain the water pump assembly 10, he / she only needs to remove the upper housing 22 of the scrubbing device from the bottom housing 21 of the scrubbing device, and then loosen and remove the screws 104 of the fixing ears 102 on both sides of the water pump assembly 10. Then, the entire water pump assembly 10 can be manually removed from the bottom housing 21 of the scrubbing device.

[0082] Specifically, such as Figure 1 , Figure 3 As shown, the peripheral wall of the power access opening 101 of the housing 100 is provided with at least one sealing ring groove (not shown in the attached figure), such as... Figure 3As shown, the sealing ring groove is used to engage the sealing ring 108, so as to achieve the isolation and sealing of other parts of the entire scrubbing device when the water pump body 10 is installed between the bottom shell 21 and the upper shell 22 of the scrubbing device.

[0083] Thus, the water pump assembly provided by this invention, with the housing, bracket, and rear end cover installed together, can provide a certain degree of support under stress, preventing the water pump from being impacted by external forces during operation and extending its service life. At the same time, the housing and bracket make it more convenient for the water pump to draw power from external sources, and the rear end cover makes it more convenient to connect the water pump to external water extraction and transportation pipelines.

[0084] In one specific embodiment, such as Figure 5 , Figure 8 As shown, the bracket 600 has a docking end 605, an opening-closed end (not shown in the figure), and a bracket body 602 connecting the two; the bracket body 602 is semi-cylindrical and open at the top; the docking end 605 is detachably connected to the power supply opening 101; the opening-closed end closes the water outlet opening end, and the opening-closed end has an opening for the water pump 400 to enter and exit; the rear end cover 300 closes the opening.

[0085] Specifically, such as Figure 8 As shown, the docking end 605 includes a heat dissipation notch 602a, a wiring notch 602b, and a docking portion 603. A docking groove 603a is provided at one end of the docking portion 603 facing the power extraction opening 101 of the housing, as shown... Figure 3 As shown, when the docking part 603 and the power extraction opening 101 are docked towards the inner wall of the bracket 600, the docking groove 603a engages with the protruding rib (not shown in the figure) provided on the inner wall of the power extraction opening 101.

[0086] In this way, the docking end allows the bracket to quickly and easily connect with the power supply opening. After accurate docking, the two can be detached, which further reduces the assembly difficulty of the water pump assembly and improves the convenience of users maintaining the water pump assembly.

[0087] In one or more alternative embodiments, the water pump assembly 10 further includes an electrode structure 201, which is provided between the front end cover 200 and the housing 100. The electrode structure 201 is electrically connected to the two terminals of the water pump 400's power terminal 400b. The electrode structure 201 extends out of the front end cover 200 to draw power from the outside.

[0088] In one specific embodiment, such as Figure 3 , Figure 6 , Figure 7 , Figure 10As shown, the water pump assembly 10 also includes a control system (500, 500'), which is installed at the open semi-cylindrical top of the bracket body 602. The control system is electrically connected to the power terminal 400b and controls the operation of the water pump 400. The control system is also electrically connected to the electrode structure 201 and is powered externally.

[0089] Furthermore, such as Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 10 As shown, the control system includes a first control board 500 and a second control board 500', which are electrically connected and work together.

[0090] In one specific embodiment, such as Figures 1 to 3 , Figure 5 , Figure 8 As shown, the power extraction opening 101 includes a partition 101a that divides the cavity into a receiving cavity and a power receiving cavity P. The partition 101a is located at one end of the housing 100 near the front end cover 200. The receiving cavity houses the bracket 600. The power receiving cavity P is provided with the electrode structure 201. The partition 101a is provided with a fixing nut post 101b, a wire passage (not shown in the figure), and an electrode mounting base 101d. The fixing nut post 101b is used to fix the front end cover 200, which can be fixed with screws. The fixing nut 101b is driven into the front end of the front cover 200 through the outer end, thereby sealing and fastening the front end of the front cover 200 to the outward-facing end of the power access opening 101; the wire passage can be used to lead out the electrode structure 201 for electrical connection to the control system; the electrode mounting base 101d can be used to fix and limit the electrode structure 201 so that the protruding end of the electrode structure 201 can accurately extend out of the front end cover 200, enabling the water pump assembly 10 to conveniently draw power from the scrubbing device. Furthermore, as... Figure 2 , Figure 3 , Figure 8 As shown, a through hole is provided at the lower center of the partition 101a, and a locking nut 603b is provided at the corresponding position of the docking part 603 and the through hole. By driving a screw through the through hole from the outward side of the partition 101a into the locking nut 603b, the docking end 605 can be detachably connected to the power access opening 101, thereby completing the fastening connection between the housing 100 and the bracket 600 at the power access opening 101.

[0091] Thus, the assembly of the water pump and the bracket, and the fitting of the components into the housing, is very convenient. Only one screw is needed to achieve a tight connection between the assembled water pump and the bracket and the housing, which is quick and easy.

[0092] As needed, the housing 100 is also provided with ribs (not shown in the figure) to enhance the strength of the load and reduce the weight. The extension direction of the ribs is consistent with the axial direction of the water pump 400.

[0093] In one specific embodiment, such as Figure 3 , Figure 6 , Figure 7 As shown, an abutment ring 400c is provided between the water inlet / outlet end 400a and the power connection end 400b of the water pump 400. The main body of the water inlet / outlet end 400a is cylindrical, and the main body of the power connection end 400b is cylindrical. The step transition portion between the water inlet / outlet end 400a and the power connection end 400b forms the abutment ring 400c. The maximum outer diameter of the power connection end 400b is smaller than the maximum outer diameter of the water inlet / outlet end 400a.

[0094] In one specific embodiment, such as Figures 6 to 8 As shown, the end of the docking end 605 is provided with a docking part 603. The upper half of the docking end 605 is provided with a wiring notch 602b, which is completely open. There is also a notch on the upper edge of the docking part 603, which is formed by extending the wiring notch 602b downwards, so as to facilitate the wire harness cable to pass through, bend and electrically connect with the control system and electrode structure 201. The lower half of the docking end 605 is provided with a heat dissipation notch 602a, which is partially open. The cylindrical inner wall of the bracket 602 is provided with a snap-fit ​​step (not shown in the figure) near the heat dissipation notch 602a. The snap-fit ​​step abuts against the abutment ring 400c of the water pump 400.

[0095] Specifically, such as Figure 3 , Figures 6 to 8 As shown, the inner cylindrical inner wall of the inner shell 602 has a snap-fit ​​step near the heat dissipation notch 602a. This snap-fit ​​step abuts against the abutment ring 400c of the water pump 400. Other parts of the inner shell 602 have gaps with the water pump 400. There are also gaps between the inner shell 600 and a portion of the outer shell 100. These two gaps allow the inner shell 600 and / or the outer shell 100 to absorb the impact of large external forces when the shell is subjected to them at specific locations. They also allow for the transmission of certain forces, increasing the strength of the outer shell of the entire water pump assembly and preventing the impact of large external forces from being transmitted to the water pump 400 through the outer shell 100 and inner shell 600, thus avoiding damage to the water pump. Figure 3 , Figure 7As shown, the front space in the radial direction of the water pump 400 is larger than the rear space in the radial direction of the water pump 400. Simply put, the outer diameter of the water outlet end 400a of the water pump 400 is larger than the outer diameter of the power connection end 400b. Correspondingly, the fact that the front space in the radial direction of the water pump 400 is larger than the rear space in the radial direction of the water pump 400 makes it easier to assemble the water pump 400 with the inner shell 600 and then install it into the housing 100.

[0096] Thus, gaps are provided between the other parts of the inner shell and the water pump, and gaps are provided between the inner shell and the outer shell. These two gaps can absorb the impact of the external force when the outer shell is subjected to a large external force at a specific location by utilizing the elastic deformation of the inner shell and / or the outer shell. They can also transmit a certain force to other components of the portable car wash machine that cooperate with the water pump assembly. This can increase the strength of the outer shell of the entire water pump assembly and prevent the impact of the external force from being transmitted to the water pump through the outer shell and inner shell when the entire water pump assembly is subjected to a large external force, thus avoiding damage to the water pump.

[0097] It should be noted that the aforementioned abutment ring 400c is used to make the technical solution described above easier for those skilled in the art to understand through illustrations and text, and does not limit the specific structure of the water pump 400 and the abutment ring 400c. As is well known to those skilled in the art, the water pump can also be configured with one end larger than the other. Accordingly, the abutment ring 400c adaptably becomes a conical surface connecting the large end and the small end of the water pump 400, and the corresponding locking step is also a conical surface or a small section of a conical surface, as long as the abutment ring 400c and the locking step can cooperate to abut. Of course, more often than not, the cylindrical diameters of the water pump's outlet end 400a and the power connection end 400b are the same. In simpler terms, the water pump is a complete straight cylindrical structure. In this case, there is no abutment ring 400c. However, the inner wall of the inner shell 602 has a tapered step near the heat dissipation gap 602a. The minimum inner diameter of the tapered surface is smaller than the diameter of the water pump 400. This design also achieves the effect of facilitating the entry and exit of the straight cylindrical water pump 400 into the cylindrical space, and also effectively isolates the cylindrical space into a front space and a rear space. The specific solution is similar to the aforementioned technical solutions and will not be elaborated here. The combination of a straight cylindrical and slightly tapered water pump 400 with a snap-fit ​​step is also within the scope of protection of this application.

[0098] Specifically, such as Figures 6 to 8As shown, the electrical contacts 400b1 and 400b2 of the power terminal 400b of the water pump 400 can easily pass through the wiring notch 602b and connect to the control system 500. Simultaneously, the control system can still utilize the space of the wiring notch 602b to electrically connect to the electrode structure 201. When the water pump 400 malfunctions, the wiring notch 602b allows for easy observation of the wiring harnesses and cables connecting the water pump 400, the control system, and the electrode structure 201. This facilitates user observation of whether there is high-current burning in the wiring harnesses, electrical connections, and the control system, and also allows for direct observation of the control system's condition, enabling maintenance personnel or users to perform corresponding maintenance diagnostics and analyses. The heat dissipation notch 602a allows maintenance personnel or users to directly disassemble the assembled water pump 400 and bracket 602 when the water pump assembly malfunctions, allowing them to directly feel the temperature of the water pump 400's housing surface. This indirectly determines whether the water pump 400 has been operating in a high-temperature environment for an extended period before the malfunction, facilitating maintenance personnel or users to perform corresponding maintenance diagnostics and analyses. The housing of the water pump 400 is usually made of metal, with some open space reserved, which helps the water pump 400 to dissipate heat from the environment through radiation and air convection, thus extending the service life of the water pump 400.

[0099] In one specific embodiment, such as Figure 3 , Figures 6 to 8 As shown, the snap-fit ​​step divides the through space into a first space (not shown in the figure) accommodating the electrical terminal 400b and a second space (not shown in the figure) fixing the inlet / outlet water terminal 400a. The first space is radially smaller than the second space. Since the maximum outer diameter of the electrical terminal 400b of the water pump 400 is smaller than the maximum outer diameter of the inlet / outlet water terminal 400a, this facilitates the user in easily inserting the water pump 400 into the through space with the smaller end first. This small-to-large approach makes it easier for the user to insert the water pump 400 into the through space. Conversely, the large-to-small approach is used to remove the water pump 400 from the through space, making it easier for the user to remove the water pump 400 from the through space.

[0100] Specifically, such as Figure 3 , Figure 7As shown, the cylindrical inner wall of the bracket 602 has a snap-fit ​​step near the heat dissipation notch 602a. The snap-fit ​​step abuts against the abutment ring 400c of the water pump. Other parts of the bracket 602 have gaps between itself and the water pump 400. A gap is also provided between the bracket 600 and a portion of the housing 100. These two gaps allow the bracket 600 and / or the housing 100 to absorb the impact of large external forces when the housing is subjected to them at specific locations. They also allow for the transmission of certain forces, increasing the strength of the entire water pump assembly's outer shell and preventing the impact of large external forces from being transmitted through the housing 100 and bracket 600 to the water pump 400, thus avoiding damage to the water pump. Figure 3 , Figure 7 As shown, the first space in the radial direction of the water pump 400 is larger than the second space in the radial direction of the water pump 400. Simply put, the outer diameter of the water outlet end 400a of the water pump 400 is larger than the outer diameter of the power connection end 400b. Correspondingly, the fact that the first space in the radial direction of the water pump 400 is larger than the second space in the radial direction of the water pump 400 makes it easier to assemble the water pump 400 with the bracket 600 and then install it into the housing 100.

[0101] Thus, gaps are provided between the other parts of the bracket and the water pump, and gaps are provided between the bracket and the housing. These two gaps can absorb the impact of the external force when the housing is subjected to a large external force at a specific location by utilizing the elastic deformation of the bracket and / or the housing. They can also transmit a certain force to other parts of the scrubbing device that cooperate with the water pump assembly. This can increase the strength of the housing of the entire water pump assembly and prevent the impact of the external force from being transmitted to the water pump through the housing and bracket when the entire water pump assembly is subjected to a large external force, thus avoiding damage to the water pump.

[0102] It should be noted that the aforementioned abutment ring 400c is used to more intuitively illustrate the technical solution described above to those skilled in the art, and does not limit the specific structure of the water pump 400 and the abutment ring 400c. As is well known to those skilled in the art, water pumps can often be configured with one end larger than the other. In this case, the abutment ring 400c adaptably becomes a conical surface connecting the large end and the small end of the water pump 400. Correspondingly, the locking step is also a conical surface or a small section of a conical surface, as long as the abutment ring 400c and the locking step can cooperate to abut. Of course, more often than not, the cylindrical diameters of the water pump's outlet end 400a and the power connection end 400b are the same. In simpler terms, the water pump is a complete straight cylindrical structure. In this case, there is no abutment ring 400c. However, the cylindrical inner wall of the bracket 602 has a tapered locking step near the heat dissipation gap 602a. The minimum inner diameter of the tapered surface is smaller than the diameter of the water pump 400. This design also achieves the effect of facilitating the entry and exit of the straight cylindrical water pump 400 into the through space, and also effectively isolates the through space into a first space and a second space. The specific solution is similar to the aforementioned technical solutions and will not be elaborated here. The solution of using a straight cylindrical and slightly tapered water pump 400 with a locking step is also within the scope of protection of this application.

[0103] In one specific embodiment, such as Figure 6 As shown, the control system is provided with a positive lead-out point 501a, a negative lead-out point 501b, a water pump power supply lead-out point one 503a, and a water pump power supply lead-out point two 503b; the contact tongue 201b of one electrode cap 201a is electrically connected to the positive lead-out point 501a, and the contact tongue 201b of the other electrode cap 201a is electrically connected to the negative lead-out point 501b; the first contact 400b1 is electrically connected to the first water pump power supply lead-out point 503a, and the second contact 400b2 is electrically connected to the second water pump power supply lead-out point 503b.

[0104] Thus, after the water pump assembly 10 is assembled between the bottom shell 21 and the upper shell 22 of the scrubbing device, the battery assembly 50 in the handle connects the water pump 400 in the water pump assembly 10 to the control system and other electrical devices of the scrubbing device through two sets of electrodes 201.

[0105] In one specific embodiment, such as Figure 7 , Figure 8 As shown, the closed end of the opening is provided with a sealing part 601 extending outward perpendicularly to the cylindrical sidewall of the support body 602, and the sealing part 601 closes the water outlet opening end of the housing 100. Specifically, as Figure 7 , Figure 8As shown, the overall outer periphery of the sealing part 601 is rectangular, and the overall shape of the inner wall of the water outlet end of the housing 100 is also rectangular, corresponding to the sealing part 601. The sealing part 601 closes the water outlet end of the housing 100. Simultaneously, the corresponding wire harness cable can pass through the wire passage notch 6011 on the sealing part 601, and the wire passage groove 301 of the rear end cover 300 further seals and wraps the wire harness cable, ensuring a sealed connection between the inner wall of the water outlet end of the housing 100 and the outer periphery of the sealing part 601. Of course, this application is not limited to the overall outer periphery of the sealing part 601 being rectangular; it can also be circular, a regular polygon, or other irregular shapes, and the corresponding inner wall of the water outlet end of the housing 100 can be circular, a regular polygon, or other irregular shapes, as long as the shapes of the two can perfectly match to achieve a sealed connection. The specific shapes and corresponding sealing connection methods will not be elaborated here.

[0106] Furthermore, the sealing part 601 may also be fitted with a sealing ring 604 to enhance the sealing performance of the sealing part 601 to the water outlet end of the housing 100.

[0107] By making the outer periphery shape of the sealing part of the bracket and the inner wall shape of the water outlet end of the housing consistent, the bracket can connect with the power supply opening of the housing at the docking end, and the sealing part of the bracket can also achieve a sealed connection with the water outlet end of the housing. This reduces the difficulty of disassembling and assembling the water pump assembly, improves the disassembly and assembly efficiency of the water pump assembly, improves the production efficiency of the scrubbing device manufacturer, and improves the convenience for users to maintain the water pump assembly themselves.

[0108] In one specific embodiment, such as Figures 5 to 8 As shown, the bracket body 602 is provided with at least one guide rib 6021 parallel to the axis of the water pump 400, facilitating the sliding of the bracket 600 into the housing 100; the bracket body 602 has two mounting ribs (602b1, 602b2) extending upward from the two parallel sides of the heat dissipation notch 602a parallel to the axis of the water pump, and the mounting rib 602b1 is provided with a screw hole for fixing the control system; the wiring harness is electrically connected to the control system and then passes through the wire passage notch 6011. Specifically, as Figure 8As shown, the bracket body 602 is provided with at least one guide rib 6021 parallel to the water pump axis. Correspondingly, the housing 100 is provided with a corresponding guide groove (not shown in the figure) at the point where it mates with the guide rib 6021. The cooperation between the guide 6021 and the guide groove ensures that when the bracket body 602 is pushed and slid from the water outlet end of the housing 100 to the power supply opening 101, after it is pushed and slid into place, it ensures that the docking groove 603a of the bracket is accurately aligned with the protruding rib provided on the inner wall of the power supply opening 101. This eliminates the trouble of maintenance personnel or users having to repeatedly align the components themselves, reduces the difficulty of disassembling and assembling the water pump assembly, improves the disassembly and assembly efficiency of the water pump assembly, improves the production efficiency of the scrubbing device manufacturer, and improves the convenience for users to maintain the water pump assembly themselves.

[0109] Specifically, the mounting rib 602b1 is used to fix the first control plate 500, and the mounting rib 602b2 is used to fix the second control plate 500'.

[0110] In this way, the mounting ribs, cable notches, and guide ribs of the bracket allow the control system to be securely installed on the bracket and the relevant wiring harnesses and cables to be arranged in a reasonable and regular manner. This prevents any pulling of the wiring harnesses and cables during the sliding of the bracket, which houses the water pump and control system, into the housing. It also ensures accurate alignment between the bracket and the housing, reducing the difficulty of disassembling and assembling the water pump assembly, improving the efficiency of disassembly and assembly of the water pump assembly, increasing the production efficiency of the scrubbing device manufacturer, and improving the convenience for users to maintain the water pump assembly themselves.

[0111] In one specific embodiment, such as Figures 3 to 6 , Figures 8 to 10 As shown, the through structure includes a through hole for the inlet / outlet end 400a to pass through and is provided on the rear end cover 300, a notch for the wire harness to pass through the rear end cover 300 after electrically connecting the control system and the water pump 400, and a through hole provided on the sealing part 601. The through hole includes an inlet through hole 300a4, an outlet through hole 300a5, and a wire passage notch 6011 provided on the sealing part 601; the notch includes a wire passage groove 301 provided on the rear end cover 300 after the wire harness is electrically connected to the control system and the water pump 400. Specifically, as shown... Figure 3 , Figure 9As shown, the inlet through hole 300a4 and the outlet through hole 300a5 are circular, which fit perfectly onto the inlet 401 and outlet 402 of the water pump 400, respectively. This allows the rear cover 300 to better seal the water pump 400 within the space enclosed by the housing 100, the bracket 600, and the rear cover 300, leaving only the space required for the inlet 401 and outlet 402 of the water pump 400 to connect to relevant pipelines. The shape of the wire passage notch 6011 is adapted to the projection shape of the wire harness cable onto the sealing part 601, so that the wire harness cable can pass through the wire passage notch 6011 and further through the wire passage groove 301 of the rear end cover 300, minimizing the gaps that may lead to water leakage during the passage process. This potential leakage does not refer to leakage from the water pump itself, but rather to potential leakage from the entire water pipe system of the scrubbing device, which could flow back along the outer wall of the pipe to the corresponding joint and then from the joint to other gaps. The shape of the wire passage groove 301 is adapted to the shape of the wire harness projection in the wire harness extension direction after it passes through the wire passage notch 6011, further reducing the gaps involved in the process of the wire harness passing through the rear end cover 300.

[0112] Thus, the through structure includes through holes and notches that allow the inlet and outlet ends to pass through and are provided on the rear end cover, as well as through holes provided on the sealing part, so that the rear end cover can better seal the water pump in the space enclosed by the housing, bracket, and rear end cover, leaving only the space required for the water pump's inlet and outlet to connect to the relevant pipelines, so as to further reduce the gaps involved in the process of the wire harness passing through the rear end cover.

[0113] In one specific embodiment, such as Figures 1 to 3 , Figures 5 to 6 , Figure 10 As shown, the electrode structure 201 can be an electrode 201, which specifically includes an electrode cap 201a, an externally connected contact tongue 201b, and a spring 201c for extending the electrode cap 201a. The electrode cap 201a includes a shoulder (not shown in the figure) that restricts the electrode cap from extending outward from the outer surface of the front end cover 200. The contact tongue 201b extends laterally in a strip shape from the side wall of the electrode cap for electrical connection with the wire harness cable. The extension and retraction direction of the electrode cap 201a is not on the same straight line as the normal to the end face of the inlet / outlet end 400a of the water pump 400.

[0114] In one specific embodiment, the extension and retraction direction of the electrode cap 201a forms an acute angle with the normal to the end face of the inlet / outlet end 400a of the water pump 400.

[0115] Specifically, such as Figure 3 , Figure 11As shown, the extension / retraction direction of the electrode cap 201a forms an acute angle α with the axial direction of the water pump 400. The end face of the inlet / outlet end 400a is perpendicular to the axial direction of the water pump 400, so the extension / retraction direction of the electrode cap 201a forms an acute angle α with the normal to the end face of the inlet / outlet end 400a. Generally, we can simply say that the extension / retraction direction of the electrode cap forms an acute angle with the inlet / outlet direction of the water pump. Preferably, the acute angle α ranges from 5 to 60 degrees. Figure 3 When the acute angle α is 5 degrees, the exposed electrode 201 of the front cover 200 of the water pump assembly is only slightly tilted towards the output end of the battery assembly 50 of the scrubbing device, and the two are elastically abutting. The battery assembly 50 is located inside the handle of the scrubbing device. In this way, the handle of the scrubbing device is slightly tilted and connected to the entire body of the scrubbing device. The water pump assembly is located at the connection point where the battery assembly 50 inside the handle and the water tank assembly 40 of the scrubbing device body are connected. The concentrated water pump assembly provides strong connection and load-bearing strength to the connection point of the entire scrubbing device body. When the acute angle α is 5 degrees, the tilt angle between the handle and the body of the scrubbing device allows the user to easily and elastically abut the cleaning roller of the scrubbing device against the surface to be cleaned by simply lifting the handle slightly, making it convenient for the user to hold the scrubbing device with one hand or both hands to clean the surface. When the acute angle α is 60 degrees, the handle and the body of the scrubbing device are as follows: Figure 11 The angle shown is 60 degrees, and the length of the body and the handle are roughly the same, allowing the user to easily lift the handle to allow the cleaning roller to spring against the surface to be cleaned. This facilitates convenient one-handed or two-handed cleaning. Because the lengths of the body and handle are roughly the same, the 60-degree angle provides sufficient structural strength to the water pump assembly at the corner, ensuring a strong connection. Furthermore, 60 degrees is a visually acceptable angle for the corner of a typical cleaning device, allowing users to confidently and comfortably use the device by holding the handle.

[0116] Thus, the extension and retraction direction of the electrode cap forms an acute angle with the water pump's inlet and outlet directions, allowing the water pump assembly to stably and elastically connect with the battery assembly inside the scrubbing device handle. This provides sufficient strength support at the corner where the handle and body converge, facilitating one-handed or two-handed use of the scrubbing device to clean surfaces. Because the water pump assembly has a front cover at the end furthest from the scrubbing head, the exposed electrode structure 201 is close to the battery assembly output end inside the handle. This brings the water pump inlet and outlet closer to the scrubbing head, resulting in a simpler water pipe and power supply circuit layout and a more compact overall structure. Furthermore, the water pump assembly, through different components located on two fixed surfaces at either end, provides support to the housing under stress, extending the overall lifespan of the scrubbing device.

[0117] In one specific embodiment, such as Figure 3 , Figure 6 , Figure 10 As shown, the housing 100 also has a light guide structure for guiding the status indicator light source of the control system. This light guide structure includes a light guide plug 103 and a light guide post (not shown in the figure). This light guide structure allows the user to visually understand the working status of the water pump 400 and the control system during operation. Further, the light guide plug 103 includes a light-shielding portion 103b, which is made of an opaque material. The light guide post is made of a light-transmitting material, and the light-shielding portion 103b surrounds the light guide post, allowing the user to easily observe the status of the status indicator light source of the control system from the outward end face of the light guide post. The housing 100 also has a button 103a that can elastically abut against the start / stop / mode selection button on the control system. The button 103a maintains the isolation and sealing between the housing 100 and the control system. Figure 3 , Figure 6 , Figure 10 As shown, by placing the button 103a adjacent to the light guide structure, the user can immediately see the timely working status response of the water pump 400 and the control system 500 after the washing device triggers the function when pressing the start / stop / mode selection button. This improves the user's experience of the washing device's responsiveness.

[0118] Preferred, such as Figure 3 , Figure 6 , Figure 10As shown, the light guide plug 103 is integrally formed with the button 103a. In this case, the light guide plug 103 is a single unit, including the button 103a and the light-shielding part 103b. The materials of the button 103a and the light-shielding part 103b are not limited here. Depending on actual needs, the button 103a and the light-shielding part 103b can be formed using two different materials and two different processes through secondary injection molding, or they can be formed using only one material through single injection molding.

[0119] In one specific embodiment, such as Figure 5 , Figure 9 , Figure 10 As shown, the rear cover 300 includes a cover body 300a. The end face of the cover body 300a that abuts against the inlet / outlet end 400a of the water pump 400 is provided with a water pump abutment surface 300a1. The water pump abutment surface 300a1 is a concave cylindrical surface corresponding to the end face of the inlet / outlet end 400a. Maintenance notches 300a2 are provided on three peripheral walls of the water pump abutment surface 300a1. When the water pump 400 malfunctions, the user can use a tool to insert and pry open the rear cover 300 through the maintenance notches 300a2, thus separating the rear cover 300 from the bracket 602. To reduce the weight of the entire cover body 300a, the water pump abutment surface 300a1 is configured as follows: Figure 9 The reinforcing ribs, arranged in a spoke-like pattern, form a cylindrical pump contact surface 300a1 on the side facing the inlet / outlet end 400a. Four weight-reducing hollow areas 300a3 are provided at the four corners of the cover body 300a on the non-recessed cylindrical surface. The end faces of these four weight-reducing hollow areas 300a3 facing the pump 400 constitute the reference surface of the cover body 300a. At the center of the pump contact surface 300a1... A water outlet through hole 300a5 and a water inlet through hole 300a4 are respectively provided on one side of the central part of the cover body 300a; on one side of the cover body 300a where there is no maintenance notch 300a2, a cable management boss (groove) is provided above the reference surface, and a cable passage groove 301 for passing through both ends of the cover body 300a is provided on the cable management boss (groove); a sealing edge 300b is provided on the outer perimeter of the cover body 300a, such as Figure 3 As shown, the sealing edge 300b forms a seal with the opening of the closed end of the bracket body 602. It should be noted that, as described above, while the overall outer periphery shape of the sealing part 601 is similar, the inner wall of the opening of the closed end of the bracket body 602 and the outer periphery shape of the cover body 300a are not limited to the shape shown above. Figure 4 , Figure 5 , Figures 7 to 10As shown in the rectangle, the inner wall of the opening at the closed end of the bracket body 602 and the overall outer periphery of the cover body 300a can also be circular, regular polygonal, or other irregular shapes. Correspondingly, the inner wall of the opening at the closed end of the bracket body 602 can also be circular, regular polygonal, or other irregular shapes, as long as the shapes of the two can perfectly match to achieve a sealed connection. The specific shapes and corresponding sealing connection methods will not be elaborated here.

[0120] Furthermore, four snap fasteners 300a7 extend outward from the four corners of the cover body 300a, and the snap fasteners 300a7 can be more securely snapped into the closed end of the opening of the bracket body 602.

[0121] The present invention also provides an embodiment of a scrubbing device.

[0122] Specifically, such as Figure 11 As shown, the scrubbing device includes a handle and a scrubbing head connected to the handle, a water tank 40, and a water pump assembly 10. The water pump assembly 10 delivers clean water from the water tank 40 to the cleaning roller 30 on the scrubbing head. The water pump assembly 10 includes a housing 100 with a cavity and a water pump 400 installed in the cavity. The housing 100 has a rear end cover 300 that mates with the cavity opening at one end near the scrubbing head. The rear end cover 300 has a through structure for the passage of pipes connected to the water pump inlet and outlet. The other end away from the scrubbing head has a front end cover 200. An electrode structure 201 connected to the control system signal that controls the operation of the water pump is provided between the front end cover 200 and the housing 100.

[0123] Specifically, the upper housing 22 of the scrubbing device is also equipped with a water tank locking mechanism 221 and a power on / off button 222. The water tank locking mechanism 221 can quickly fix the water tank 40 on the upper housing 22 of the scrubbing device, further locking / unlocking the water tank 40 on the upper housing 22 of the scrubbing device. The power off button 222 on the upper housing 22 of the scrubbing device is located directly above the aforementioned button 103a. Pressing the power off button 222 will press the button 103a, thereby further starting / stopping / switching the working mode or state of the scrubbing device.

[0124] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention 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 or combinations can be made to some structures (technical features) in one or more embodiments. Such modifications or substitutions or combinations do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, unless the possibility of substituting or combining structures (technical features) in different embodiments is explicitly excluded in the embodiments, or such substitutions or combinations are contrary to the overall concept of the invention.

Claims

1. A water pump assembly for installation in a scrubbing device having a scrubbing head, characterised in that, include: The shell is hollow and has a cavity with openings at both ends. The end closer to the scrubbing head is the water outlet, and the end further away from the scrubbing head is the power supply opening. The power supply opening is detachably connected to a front cover, and the electrode structure exposed on the front cover is close to the output end of the battery assembly inside the handle. The bracket is hollow in the middle of its axis, forming a through space. One end of the bracket is detachably connected to the power supply opening, and the other end is closed to the water outlet opening. A water pump is installed in a through space, including an inlet and outlet end and an electrical connection end. The inlet and outlet end has an inlet and an outlet. The rear end cover is detachably connected to the water outlet end. The inlet and outlet ends extend through the rear end cover and are close to the scrubbing head. The rear end cover has a through structure for the pipelines connected to the water pump inlet and outlet ends to pass through. The housing, bracket, and rear cover are assembled together to enclose the water pump inside the housing, making the water pipeline and power supply lines simple and the overall structure of the scrubbing device compact.

2. The water pump assembly of claim 1, wherein, The bracket has a mating end, an open and closed end, and a bracket body that connects the two. The support body is semi-cylindrical with the top opening upwards; The docking end and the power supply opening are detachably connected; The opening and sealing end seals the water outlet opening end, and the opening and sealing end is provided with an opening for the water pump to enter and exit. The rear end cover seals the opening.

3. The water pump assembly of claim 2, wherein, The electrode structure is electrically connected to the power receiving terminal and is located between the front cover and the power extraction opening. The electrode structure extends out of the front cover to extract power to the outside.

4. The water pump assembly of claim 3, wherein, Also includes: The control system is installed at the open top of the semi-cylindrical bracket body, electrically connected to the wiring terminals to control the water pump operation, and electrically connected to the electrode structure, which is powered externally.

5. The water pump assembly of claim 4, wherein, The housing has a partition at one end near the front cover that divides the cavity into a receiving cavity and an electrical connection cavity; the receiving cavity contains a support; the electrical connection cavity has an electrode structure; and the partition has a cable outlet for the electrode structure to be led out and electrically connected to the control system.

6. The water pump assembly of claim 5, wherein, The partition is also equipped with a fixing nut post and an electrode mounting base; the fixing nut post is used to fix the front cover and seal it tightly to the end with the power extraction opening facing outward; the electrode mounting base is used to fix the limiting electrode structure so that the protruding end of the electrode structure can accurately extend out of the front cover to draw power from the scrubbing device.

7. The water pump assembly as claimed in claim 6, characterized in that, A through hole is provided at the lower center of the partition, and a locking nut is provided at the corresponding position of the mating part and the through hole. By driving a screw through the through hole from the outward side of the partition into the locking nut, the mating end and the power supply opening can be detachably connected, thereby completing the tight connection between the shell and the bracket at the power supply opening.

8. The water pump assembly as described in claim 5, characterized in that, The docking end includes a heat dissipation notch, a wiring notch, and a docking part. A docking groove is provided at one end of the docking part facing the power supply opening of the housing. When the docking part is docked with the inner wall of the bracket facing the power supply opening, the docking groove engages with the protruding rib provided on the inner wall of the power supply opening.

9. The water pump assembly as claimed in claim 8, characterized in that, A contact ring is provided between the water pump's inlet / outlet end and the power connection end; the upper part of the connection end has a wiring notch, which is fully open; the lower part of the connection end has a heat dissipation notch, which is partially open; the cylindrical inner wall of the bracket body has a snap-fit ​​step near the heat dissipation notch, which abuts against the water pump's contact ring.

10. The water pump assembly as claimed in claim 9, characterized in that, The snap-fit ​​step divides the through space into a first space that accommodates the electrical connection end and a second space that fixes the inlet and outlet water ends. The maximum outer diameter of the electrical connection end is smaller than the maximum outer diameter of the inlet and outlet water ends, and the first space is smaller than the second space in the radial direction.

11. The water pump assembly as claimed in claim 9, characterized in that, The opening and closing end is provided with a sealing part that extends outward from the cylindrical sidewall perpendicular to the support body. The sealing part closes the water outlet opening end and is provided with a wire through hole. The wire through hole allows the wire harness to pass through the sealing part after being electrically connected to the control system and the water pump.

12. The water pump assembly as claimed in claim 11, characterized in that, The through-hole structure includes a through hole for the inlet and outlet water ends to pass through and is provided on the rear end cover, a notch for the wiring harness to electrically connect to the control system and the water pump and then pass through the rear end cover, and a through hole provided on the sealing part.

13. The water pump assembly as claimed in claim 11, characterized in that, The overall outer periphery of the sealing part is rectangular, and the overall shape of the inner wall of the water outlet end of the shell is a rectangle corresponding to the sealing part.

14. The water pump assembly as claimed in claim 11, characterized in that, The overall outer periphery of the sealing part is circular, regular polygonal or other irregular shape, and the inner wall of the water outlet end of the shell is circular, regular polygonal or other irregular shape.

15. The water pump assembly as claimed in claim 2, characterized in that, The support body is provided with at least one guide rib parallel to the water pump axis to facilitate the support sliding into the housing.

16. The water pump assembly as claimed in claim 4, characterized in that, The bracket body has two parallel sides parallel to the water pump axis extending upwards from the semi-cylindrical top opening, and each mounting rib has a screw hole for fixing the control system.

17. The water pump assembly as claimed in claim 4, characterized in that, The rear cover has a through hole and a notch. The through hole allows the water inlet and outlet parts to pass through the rear cover, and the notch allows the wiring harness to pass through the rear cover after being electrically connected to the control system and the water pump.

18. The water pump assembly as claimed in claim 3, characterized in that, The electrode structure includes an electrode cap and a spring that extends the electrode cap. The electrode cap includes a shoulder that limits the position of the extended electrode cap. The extension and retraction direction of the electrode cap is not on the same straight line as the water pump inlet and outlet direction.

19. The water pump assembly as claimed in claim 18, characterized in that, The extension and retraction direction of the electrode cap forms an acute angle with the water pump's inlet and outlet directions.

20. The water pump assembly as claimed in claim 4, characterized in that, The housing is also provided with a light guide structure that guides the status indicator light source on the control system. The light guide structure includes a light guide column.

21. The water pump assembly as claimed in claim 4, characterized in that, The housing is also equipped with a button that can be elastically pressed against the start / stop button on the control system, and the button maintains the isolation and sealing between the housing and the control system.

22. The water pump assembly as claimed in claim 1, characterized in that, The housing is also provided with fixing ears on both sides for detachable connection with the bottom shell of the scrubbing device.

23. The water pump assembly as claimed in claim 1, characterized in that, The power access opening of the housing has at least one sealing ring groove on its peripheral wall, which is used to engage the sealing ring.

24. The water pump assembly as claimed in claim 4, characterized in that, The control system includes a first control board and a second control board, which are connected by electrical signals to work together.

25. A scrubbing device, characterized in that, It includes a handle and a scrubbing head connected to the handle, a water tank, and a water pump assembly as described in any one of claims 1-24, the water pump assembly delivering clean water from the water tank to a cleaning roller on the scrubbing head.

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