Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
  • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
  • A47L11/4036—Parts or details of the surface treating tools
  • A47L11/4038—Disk shaped surface treating tools
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46B—BRUSHES
  • A46B13/00—Brushes with driven brush bodies or carriers
  • A46B13/02—Brushes with driven brush bodies or carriers power-driven carriers
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46B—BRUSHES
  • A46B13/00—Brushes with driven brush bodies or carriers
  • A46B13/008—Disc-shaped brush bodies
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46B—BRUSHES
  • A46B9/00—Arrangements of the bristles in the brush body
  • A46B9/02—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups
  • A46B9/025—Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups the bristles or the tufts being arranged in an angled position relative to each other
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46B—BRUSHES
  • A46B9/00—Arrangements of the bristles in the brush body
  • A46B9/06—Arrangement of mixed bristles or tufts of bristles, e.g. wire, fibre, rubber
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
  • A47L11/28—Floor-scrubbing machines, motor-driven
  • A47L11/282—Floor-scrubbing machines, motor-driven having rotary tools
  • A47L11/283—Floor-scrubbing machines, motor-driven having rotary tools the tools being disc brushes
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L11/00—Machines for cleaning floors, carpets, furniture, walls, or wall coverings
  • A47L11/40—Parts or details of machines not provided for in groups A47L11/02 - A47L11/38, or not restricted to one of these groups, e.g. handles, arrangements of switches, skirts, buffers, levers
  • A47L11/4063—Driving means; Transmission means therefor
  • A47L11/4069—Driving or transmission means for the cleaning tools
• • A—HUMAN NECESSITIES
  • A46—BRUSHWARE
  • A46B—BRUSHES
  • A46B2200/00—Brushes characterized by their functions, uses or applications
  • A46B2200/30—Brushes for cleaning or polishing
  • A46B2200/3033—Household brush, i.e. brushes for cleaning in the house or dishes

Definitions

• the subject matter described herein relates to power tools, and more particularly relates to a power scrubber.
• An existing power scrubber generally comprises a housing, an electric motor, and a brush head, where the electric motor actuates the brush head to spin, so that the spinning brush head scrubs a to-be-cleaned object or surface.
• the power scrubber significantly facilitates a user's cleaning work, for example, washing a car, or cleaning a kitchen item, a floor surface, or a wall surface.
• An existing power scrubber is usually provided with only one scrubbing side, i.e., its lower surface where bristles are set, a consequence of which is that a user has to readjust the orientation of the power scrubber in the course of floor cleaning in order to clean a wall surface around a corner, which hampers the cleaning work.
• the present disclosure provides a power scrubber; by setting third bristle bundles on an outer peripheral surface of an outer disc body, an additional scrubbing side is formed for a disc brush, which enhances scrubbing efficiency and scrubbing effect of the disc brush.
• a power scrubber described herein comprises: a housing, an electric motor, a drive assembly, and a disc brush, the electric motor and the drive assembly being disposed inside the housing, the disc brush being disposed outside the housing, the electric motor driving, via the drive assembly, the disc brush to spin, the disc brush comprising an inner disc body and an outer disc body, the outer disc body being disposed surrounding an outer periphery of the inner disc body, a first bristle bundle being set on a lower surface of the inner disc body, a second bristle bundle being set on a lower surface of the outer disc body, wherein a plurality of third bristle bundles distributed circumferentially at even intervals are set on an outer peripheral surface of the outer disc body, the third bristle bundles extending outward from the outer peripheral surface of the outer disc body in a direction away from the center of the disc brush.
• the third bristle bundles are arranged in circles along the outer peripheral surface of the outer disc body.
• the third bristle bundles extend outward along radial directions of the outer disc body.
• the third bristle bundles have a length L ranging from 10 mm to 40 mm.
• the first bristle bundle has a hardness different from that of the second bristle bundle.
• the electric motor actuates, via the drive assembly, the inner disc body and the outer disc body to rotate in opposite directions; and the drive assembly comprises an inner shaft and an outer shaft, the outer shaft being sleeved outside the inner shaft, the outer disc body being connected to a lower end of the outer shaft, the inner disc body being connected to a lower end of the inner shaft.
• a latch configured to lock the outer shaft and a spring acting on the latch are provided on the housing, the latch compressed to lock the outer shaft causes the spring elastically deformed, and the spring recovering from deformation drives the released latch to be disengaged from the outer shaft.
• a plurality of slots for inserting the latch distributed circumferentially at intervals are set on an outer peripheral surface of the outer shaft.
• the lower end of the outer shaft projects out of the housing and is set with a male thread
• a connecting hole extending axially is provided in the center of the outer disc body
• a female thread is set on a hole wall of the connecting hole
• the outer disc body is connected to the lower end of the outer shaft via fitting between the female thread and the male thread
• the lower end of the inner shaft projects out of the housing and is provided with a snap connector
• a fit-in hole is provided in the center of the inner disc body
• the inner disc body is connected to the lower end of the inner shaft via fitting between the fit-in hole and the snap connector.
• a plurality of finger grooves inwardly recessed towards the center of the inner disc body are set at intervals on the outer peripheral surface of the inner disc body; and/or, the outer disc body is provided with a recessed cavity configured to receive the inner disc body, the recessed cavity being inwardly recessed upward from the lower surface of the inner disc body.
• a snap connector is provided at the lower end of the inner shaft, and a fit-in hole is provided in the center of the inner disc body; the inner disc body is removably connected to the lower end of the inner shaft via fitting between the fit-in hole and the snap connector; the simple setup structure of the inner disc body facilitates the user to remove and replace the inner disc body.
• a plurality of finger grooves distributed at intervals are set on the outer peripheral surface of the inner disc body, the finger grooves being recessed inwardly towards the center of the inner disc body; the finger grooves allow for the user to hold the inner disc body firmly, so that the user can easily remove the inner disc body in a case that the outer disc body has been connected to the outer shaft.
• the outer disc body is provided with a recessed cavity recessed inwardly upward from its lower surface; when the outer disc body is connected to the outer shaft and the inner disc body is connected to the inner shaft, the inner disc body can be received in the recessed cavity, so that the lower surface of the inner disc body can be substantially flush with the lower surface of the outer disc body, in which case the first bristle bundles on the inner disc body and the second bristle bundles on the outer disc body can be flush with each other; this ensures that the first bristle bundles and the second bristle bundles can effectively scrub a to-be-cleaned object or surface when the disc brush is spinning.
• Figs. 1-11 illustrate technical details of a power scrubber (which may all relate to a first implementation of the disclosure), comprising a housing 100, an electric motor 200, a drive assembly 300, and a disc brush 400, the electric motor 200 and the drive assembly 300 being disposed inside the housing 100, the disc brush 400 being disposed outside the housing 100, the electric motor 200 actuating, via the drive assembly 300, the disc brush 400 to spin.
• the disc brush 400 comprises an inner disc body 410 and an outer disc body 420, the outer disc body 420 being disposed surrounding an outer periphery of the inner disc body 410.
• a first bristle bundle 510 is set on a lower surface of the inner disc body 410.
• a second bristle bundle 520 is set on a lower surface of the outer disc body 420.
• a plurality of third bristle bundles 530 circumferentially distributed at even intervals are set on an outer peripheral surface of the outer disc body 420, the third bristle bundles 530 extending outward from an outer peripheral surface of the outer disc body 420 in a direction away from the center of the disc brush 400.
• the first bristle bundles 510 and the second bristle bundles 520 may be combined to form one scrubbing side of the disc brush 400.
• the third bristle bundles 530 on the outer peripheral surface of the outer disc body 420, another scrubbing side is formed on the outer peripheral surface of the outer disc body 420.
• the first bristle bundles 510 and the second bristle bundles 520 may serve to scrub the floor surface, while the third bristle bundles 530 may serve to scrub a wall surface around a wall corner.
• a recessed cavity 421 recessed inwardly upward from the lower surface is provided in the center of the outer disc body 420, the recessed cavity 421 being adapted to the inner disc body 410.
• the inner disc body 410 and the outer disc body 420 are combined to form the disc brush 400, the inner disc body 410 is received in the recessed cavity 421.
• the lower surface of the inner disc body 410 is substantially of a round shape, and the lower surface of the outer disc body 420 is substantially of a ring shape; moreover, the lower surface of the inner disc body 410 is substantially flush with the lower surface of the outer disc body 420.
• a plurality of first insertion holes 411 for setting the first bristle bundles 510 are distributed at even intervals on the lower surface of the inner disc body 410, upper ends of the first bristle bundles 510 being fixedly inserted in the first insertion holes 411, the first bristle bundles 510 extending a certain distance downward from the lower surface of the inner disc body 410.
• the first bristle bundles 510 may extend vertically downward from the lower surface of the inner disc body 410 or extend inclinedly downward from the lower surface of the inner disc body 410.
• a plurality of second insertion holes 422 for setting the second bristle bundles 520 are distributed at even intervals on the lower surface of the outer disc body 420, upper ends of the second bristle bundles 520 being fixedly inserted in the second insertion holes 422.
• the second bristle bundles 520 extend inclinedly downward from the lower surface of the outer disc body 420 so that the second bristle bundles 520 are disposed inclinedly outward relative to the central axis of the outer disc body 420.
• the second bristle bundles 520 are arranged into a plurality of circles from the inside to the outside, the outward inclining angles of the second bristle bundles 520 relative to the central axis of the outer disc body 420 being enlarged gradually from the inside to the outside.
• the second bristle bundle 520 may also extend vertically downward from the lower surface of the outer disc body 420.
• a plurality of third insertion holes 423 for setting the third bristle bundles 530 are circumferentially distributed at even intervals on the outer peripheral surface of the outer disc body 420, inner ends of the third bristle bundles 530 proximal to the center of the outer disc body 420 being fixedly inserted in the third insertion holes 423, respective third bristle bundles 530 substantially protruding outward along different radial directions of the outer disc body 420.
• the third bristle bundles 530 are arranged in circles along the peripheral direction of the outer disc body 420 so that the third bristle bundles 530 are distributed over the entire outer peripheral surface of the outer disc body 420 along the circumferential direction of the disc brush 400; in this way, the third bristle bundles 530 can effectively scrub a to-be-cleaned object or surface irrespective of how the disc brush 400 spins.
• the third bristles 530 may be arranged in two circles, three circles, or other rational number of circles based on the axial height of the outer peripheral surface of the outer disc body 420.
• the first bristle bundle 510 and the second bristle bundle 520 are set with different hardnesses.
• the hardness of the first bristle bundle 510 is exemplarily higher than that of the second bristle bundle 520, i.e., the disc brush 400 adopts a bristle setup that is harder inside and softer outside, so that the first bristle bundle 510 of higher hardness can serve to scrub stubborn dirt.
• the first bristle bundle 510 and the second bristle bundle 520 may be made of plastics or nylon with different hardnesses, each first bristle bundle 510 and each second bristle bundle 520 including a plurality of bristles.
• the first bristle bundle 510 and the second bristle bundle 520 have their lower ends substantially flush with each other, so that while the disc brush 400 is spinning, the first bristle bundle 510 and the second bristle bundle 520 may simultaneously scrub the to-be-cleaned object or surface effectively.
• the first bristle bundle 510 may have a hardness lower than that of the second bristle bundle 520, i.e., the disc brush 400 adopts a bristle setup that is softer inside and harder outside; of course, the first bristle bundle 510 and the second bristle bundle 520 may have a substantially same hardness.
• the third bristle bundles 530 are set with certain hardness, which should not be too soft.
• the third bristle bundles 530 may be made of plastics or nylon, and each third bristle bundle 530 comprises a plurality of bristles.
• the third bristle bundles 530 need to be set with a rational length. Referring to Fig.
• length L of the third bristle bundles 530 protruding outward from the outer peripheral surface of the outer disc body 420 is set to 10 mm ⁇ 40 mm; exemplarily, length L of the third bristle bundles 530 is about 30 mm. It may be understood that the length L of the third bristle bundles 530 may be set to other rational values such as 10 mm, 12 mm, 15 mm, 17 mm, 20 mm, 22 mm, 25 mm, 27 mm, 29 mm, 31 mm, 35 mm, 37 mm, or 40 mm.
• the drive assembly 300 comprises an inner shaft 310 and an outer shaft 320, the outer shaft 320 being sleeved outside the inner shaft 310, the outer disc body 420 being connected to a lower end of the outer shaft 320, the inner disc body 410 being connected to a lower end of the inner shaft 310.
• the electric motor 200 drives, via the drive assembly 300, the inner disc body 410 and the outer disc body 420 to rotate in opposite directions; opposite rotation of the inner disc body 410 and the outer disc body 420 may offset a movement tendency generated by the spinning disc brush 400, thereby mitigating the force needed for the user to hold the scrubber body, which improves user experience.
• the housing 100 comprises a main housing 110 and a bottom housing 120 that are fixed together;
• the power scrubber further comprises a speed reducer 600, the speed reducer 600 comprising an input shaft, an output shaft 610, and a planetary gear reduction construction, the planetary gear reduction construction being arranged between the input shaft and the output shaft 610, a rotary shaft of the electric motor 200 being drivingly connected to the input shaft of the speed reducer 600, an upper end of the inner shaft 310 being drivingly connected directly to the output shaft 610 of the speed reducer 600 via a coupling sleeve 330.
• the output shaft 320 is set axially hollow.
• the inner shaft 310 is rotatably supported inside the outer shaft 320 by a first bearing set 340.
• the outer shaft 320 is rotatably supported on the bottom housing 120 by a second bearing set 350.
• An upper end of the inner shaft 310 is provided with a gear section 311 that is located above the outer shaft 320.
• the drive assembly 300 further comprises a rack 360, a planetary gear 370, an upper planetary carrier 381, and a lower planetary carrier 382, the rack 360 being fixed to a bottom portion of the speed reducer 600, a lower portion of the rack 360 being provided with an outer ring gear 361, the upper planetary carrier 381 being disposed at a bottom portion of the rack 360, the lower planetary carrier 382 being located under the upper planetary carrier 381, the planetary gear 370 being supported between the upper planetary carrier 381 and the lower planetary carrier 382 by a supporting shaft 390, an upper end of the supporting shaft 390 being securely connected to the upper planetary carrier 381, a lower end of the supporting shaft 390 being securely connected to the lower planetary carrier 382, an upper end of the outer shaft 320 being securely connected to the upper planetary carrier 381.
• the outer ring gear 361 on the rack 360 is arranged vertically above the gear section 311 on the inner shaft 310.
• Two or three planetary gears 370 are arranged circumferentially at even intervals, each planetary gear 370 comprising an upper toothed portion 371 meshing with the outer ring gear 361 and a lower toothed portion 372 meshing with the gear section 311.
• gear section 311 and the planetary gears 370 mesh with each other, they rotate in opposite directions, so that the inner shaft 310 and the outer shaft 320 also rotate in opposite directions, whereby the electric motor 200 can drive, via the drive assembly 300, the inner shaft 310 and the outer shaft 320 to rotate in opposite directions.
• the outer disc body 420 is removably thread-fitted to the lower end of the outer shaft 320; and the inner disc body 410 is removably snap-fitted to the lower end of the inner shaft 310.
• the lower end of the outer shaft 320 projects downward from the bottom housing 120 out of the housing 100, and a male thread 321 is set on an outer peripheral surface of the lower end of the outer shaft 320.
• a connecting hole 424 disposed on top of the recessed cavity 421 and communicating with the recessed cavity 421 is set in the center of the outer disc body 420; a female thread 425 is set on an inner wall of the connecting hole 424; the outer disc body 420 is removably connected to the lower end of the outer shaft 320 via fitting between the female thread 425 and the male thread 321.
• the lower end of the inner shaft 310 projects downward out of the housing 100; referring to Fig. 10 , a snap connector 312 projecting out of the outer shaft 320 is secured to the lower end of the inner shaft 310, and a plurality of snap-fitting blocks 313 distributed circumferentially at intervals are provided on an outer peripheral surface of the snap connector 312. Referring to Fig.
• a fit-in hole 412 fitted with the snap connector 312 is set in the center of the inner disc body 410, a turnbuckle 413 corresponding to the snap-fitting block 313 is arranged on an inner wall of the fit-in hole 412, and the inner disc body 410 is removably connected to the lower end of the inner shaft 310 via fitting between the turnbuckle 413 on the inner wall of the fit-in hole 412 and the snap-fitting block 313 on the snap connector 312.
• a thread direction of the thread fitting is exemplarily set opposite the rotating direction of the outer shaft 320, so that the thread fitting becomes increasingly tighter while the outer shaft 320 drives the outer disc body 420 to rotate, preventing the outer disc body 420 from being loosened or released relative to the outer shaft 320.
• the snap-fitting direction between the turnbuckle 413 and the snap-fitting block 313 is exemplarily set opposite the rotating direction of the inner shaft 310, preventing the turnbuckle 413 and the snap-fitting block 313 from being loosened or released while the inner disc body 410 is rotating.
• a plurality of finger grooves 414 recessed inwardly towards the center of the inner disc body 410 are distributed at intervals on an outer peripheral surface of the inner disc body 410; the finger grooves 414 allow for the user to effectively hold the inner disc body 410, whereby the user may effectively screw the inner disc body 410, causing the inner disc body 410 to be snap-fitted with the inner shaft 310 in place or to be disengaged therefrom.
• a latch 710 configured to lock the outer shaft 320 and a spring 720 acting on the latch 710 are arranged on the housing 100, one end of the spring 720 abutting against the latch 710, an opposite end thereof abutting against the housing 100; the latch 710 that is pressed to lock the outer shaft 320 drives the spring 720 to be elastically deformed; the spring 720 recovering from deformation drives the released latch 710 to disengage from the outer shaft 320.
• the user may press down the latch 710, causing the latch 710 to abut against the outer shaft 320, blocking the outer shaft 320 from rotating during the process of removing the outer disc body 420, which facilitates the user to remove and replace the outer disc body 420.
• the spring 720 is compressed and deformed; after the latch 710 is released, the spring 720 recovering from deformation can drive the latch 710 to automatically release the outer shaft 320.
• a plurality of slots 322 for inserting the latch 710 are distributed circumferentially at intervals on the outer peripheral surface of the outer shaft 320, so that the latch 710 abutting against the outer shaft 320 can be inserted in the corresponding slot 322 to retain the outer shaft 320 circumferentially; the abutment between the latch 710 and the outer shaft 320 enhances the effect of locking the outer shaft 320 from rotating during the process of removing the outer disc body 420.
• a water discharge channel 426 may be provided on a top wall of the recessed cavity 421; a specific structure of the water discharge channel 426 may refer to the disclosure in CN216876248U , which would not be detailed here.
• the outer disc body 420 is first thread-fitted to the lower end of the outer shaft 320, and then the inner disc body 410 is snap-fitted to the lower end of the inner shaft 310.
• the electric motor 200 is started by activating the button on the housing 100, the running electric motor 200 drives, via the speed reducer 600 and the drive assembly 300, the inner disc body 410 and the outer disc body 420 to rotate in opposite directions, and the rotating inner disc body 410 and outer disc body 420 drive the first bristle bundles 510 and the second bristle bundles 520 to scrub a to-be-cleaned object or surface.
• the first bristle bundles 510 and the second bristle bundles 520 serve to scrub the floor surface
• the third bristle bundles 530 may scrub the wall surface nearby the floor surface, so that the user can effectively scrub the wall surface around the wall corner without a need of readjusting the orientation of the disc brush 400, whereby user experience is enhanced.
• the power scrubber according to this implementation may be powered by batteries or powered by mains electricity via a wire.
• the power scrubber according to this implementation may have an appearance generally resembling a pistol structure, a linear structure, or an elongated rod structure.

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• Brushes (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=95250567

Family Applications (1)

Country Status (3)

Citations (5)

• 2024
  • 2024-04-18 CN CN202420824099.6U patent/CN222787644U/zh active Active
• 2025
  • 2025-04-08 EP EP25169244.8A patent/EP4635390A1/de active Pending
  • 2025-04-09 US US19/174,042 patent/US20250325095A1/en active Pending

Patent Citations (5)

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