Roller brush assembly for robot vacuum cleaner, and robot vacuum cleaner

Abstract

The present application relates to a roller brush assembly for a robot vacuum cleaner, and a robot vacuum cleaner. According to the present application, a rotating main shaft of a roller brush assembly can be provided with a hollow shaft cavity and a mounting slit penetrating from the outer shaft wall to the hollow shaft cavity. A fixed tooth row component and a movable tooth row component are inserted into the mounting slit, and a moving component is arranged in the hollow shaft cavity. On the basis of the transmission connection of the moving component and a fixed shaft component inserted into the hollow shaft cavity, and the transmission connection of the moving component and the movable tooth row component, the moving component can reciprocatingly move in the axial direction during rotation of the rotating main shaft relative to the fixed shaft component, and the movable teeth of the movable tooth row component are triggered by the reciprocating motion to perform reciprocating staggered cutting motion relative to the fixed teeth of the fixed tooth row component. Therefore, by means of the reciprocating staggered cutting motion of the movable teeth protruding from the outer shaft wall relative to the fixed teeth, the roller brush assembly can have the capability of autonomously implementing active cutting of the filament-shaped dirt wound and wrapped on the outer shaft wall of the rotating main shaft.

Description

Roller brush assembly for sweeping robot and sweeping robot

[0001] This application claims priority to the Chinese patent applications filed with the Patent Office of China on July 10, 2023, with application number 202310836645.8, with the invention name “Roller brush assembly for sweeping robot and sweeping robot” and application number 202321789202.X, with the utility model name “Roller brush assembly for sweeping robot and sweeping robot”, and filed with the Patent Office of China on August 31, 2023, with application number 202311120242.X, with the invention name “Roller brush assembly for sweeping robot and sweeping robot” and application number 202322365427.9, with the utility model name “Roller brush assembly for sweeping robot and sweeping robot”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of intelligent cleaning, and in particular to a roller brush assembly for a sweeping robot and a sweeping robot. Background Art

[0003] The sweeping robot includes a mobile chassis, a roller brush assembly, a suction component and a dust collecting component (such as a hard dust box or a flexible dust bag), wherein the roller brush assembly can use a cleaning brush radiating from a rotating main shaft to perform a hoisting operation on the lower area of ​​the mobile chassis.

[0004] Discrete impurities such as dust and food crumbs can be swept into the interior of the robot vacuum by the cleaning brush and then sucked into the dust collection unit by the suction airflow generated by the suction unit. However, filamentous impurities such as hair may become entangled in the roller brush assembly and thus cannot be sucked into the dust collection unit by the suction airflow generated by the suction unit.

[0005] To deal with filamentous dirt, the prior art attempts to set a static cutting blade in the outer area of ​​the cleaning brush and make the cleaning brush interfere and collide with the static cutting blade during rotation, in the hope that the filamentous dirt attached to the cleaning brush can be cut into easily sucked debris by contacting the static cutting blade during the interference collision process.

[0006] However, the cutting force exerted on the filamentous dirt when it contacts the static cutting blade is limited, so there is a probability that the filamentous dirt attached to the end of the brush cannot be cut off in one go; moreover, the interference collision of the cleaning brush with the static cutting blade only occurs at the outer end of the brush. Therefore, if the filamentous dirt attached to the end of the brush gradually tightens and wraps around the rotating main shaft before being cut off, it will not be able to contact the static cutting blade again with the interference collision of the cleaning brush with the static cutting blade, and may eventually be entangled and wrapped around the outer shaft wall of the rotating main shaft.

[0007] Therefore, during the cleaning and maintenance of the sweeping robot, it is necessary to manually clean the filamentous dirt wrapped around the outer shaft wall of the rotating main shaft, which not only has low cleaning efficiency and great cleaning difficulty, but also affects the user experience.

[0008] It can be seen that how to automatically clean the filamentous dirt wrapped around the outer shaft wall of the rotating main shaft has become a technical problem to be solved in the existing technology.

[0009] Summary of the Invention

[0010] In an embodiment of the present application, a roller brush assembly for a sweeping robot and a sweeping robot are provided, which can automatically clean filamentous dirt wrapped around the outer shaft wall of a rotating main shaft.

[0011] A roller brush assembly for a sweeping robot provided in an embodiment of the present application may include:

[0012] A rotating spindle, wherein the rotating spindle is equipped with a cleaning brush extending radially from an outer shaft wall, the rotating spindle further comprising a hollow shaft cavity, and a mounting slit extending from the outer shaft wall to the hollow shaft cavity, the mounting slit extending along the axial direction of the rotating spindle, and the mounting slit and the cleaning brush are staggered;

[0013] a cutting assembly, the cutting assembly comprising a fixed tooth row component fixedly inserted in the mounting slit, and a movable tooth row component movably inserted in the mounting slit, the fixed tooth row component comprising a plurality of fixed teeth protruding from the outer shaft wall, and the movable tooth row component comprising a plurality of movable teeth protruding from the outer shaft wall;

[0014] A fixed shaft assembly, the fixed shaft assembly being inserted into the hollow shaft cavity;

[0015] a moving member, the moving member being movably mounted in the hollow shaft cavity along the axial direction, and being in transmission connection with the fixed shaft assembly and the movable gear row member;

[0016] Wherein, during the period when the rotating main shaft drives the cleaning brush, the cutting assembly and the movable member to rotate relative to the fixed axis assembly, the transmission connection causes the movable member to generate reciprocating movement in the axial direction, and the reciprocating movement drives the movable teeth to perform a cutting movement that is reciprocatingly offset relative to the fixed teeth in the axial direction.

[0017] In some examples, optionally, the rotating main shaft further includes a plurality of guide comb teeth spaced apart along the axial direction on the outer shaft wall to form a drainage channel spanning the mounting slit between every two adjacent guide comb teeth; the positions of the fixed teeth and the guide comb teeth in the axial direction are aligned with each other; and the reciprocating offset motion stroke of the movable teeth relative to the fixed teeth is greater than the channel width of the drainage channel in the axial direction.

[0018] In some examples, optionally, the guide comb teeth are spaced apart and distributed at the slit edges on opposite sides of the installation slit in the slit width direction.

[0019] In some examples, optionally, the guide comb teeth have comb tooth side walls that are flush with the slit edges; the fixed teeth are positioned against the comb tooth side walls of the guide comb teeth at one side of the slit edge; and the movable teeth are slidingly fitted with the comb tooth side walls of the guide comb teeth at the other side of the slit edge.

[0020] In some examples, optionally, the fixed tooth row component includes a fixed tooth mounting bar fixed in the mounting slot, and the fixed tooth teeth protrude from the outer side edge of the fixed tooth mounting bar close to the outer shaft wall outside the outer shaft wall of the rotating main shaft; the movable tooth row component includes a movable tooth mounting bar movably mounted in the mounting slot, and the movable tooth teeth protrude from the outer side edge of the movable tooth mounting bar close to the outer shaft wall outside the outer shaft wall of the rotating main shaft; the movable tooth row component also includes a movable tooth transmission arm extending from the inner side edge of the movable tooth mounting bar close to the hollow shaft cavity into the hollow shaft cavity, and the movable tooth transmission arm is transmission-connected to the movable component.

[0021] In some examples, optionally, the fixed tooth row component further includes a fixed tooth mounting lug extending from the fixed tooth mounting bar near the inner side edge of the hollow shaft cavity into the hollow shaft cavity, and the fixed tooth mounting bar is fixed in the mounting slit by the fixed connection of the fixed tooth mounting lug with the rotating main shaft in the hollow shaft cavity; the movable tooth row component further includes a movable tooth mounting lug extending from the movable tooth mounting bar near the inner side edge of the hollow shaft cavity into the hollow shaft cavity, and the movable tooth mounting bar is movably mounted in the mounting slit by the movable tooth mounting lug with the rotating main shaft in the hollow shaft cavity along the axial direction.

[0022] In some examples, optionally, the fixed tooth mounting lug is provided with a circular hole, and the movable tooth mounting lug is provided with a long hole extending along the axial direction; the rotating main shaft also includes a mounting boss located in the hollow shaft cavity, and the mounting boss is used to be threadedly connected to a mounting stud passing through the circular hole and the long hole; wherein, the plug-in fit of the mounting stud and the circular hole enables the fixed tooth mounting lug to be fixedly connected to the rotating main shaft in the hollow shaft cavity, and the sliding fit of the mounting stud and the long hole enables the movable tooth mounting lug to be movably assembled with the rotating main shaft in the hollow shaft cavity along the axial direction.

[0023] In some examples, optionally, the moving member is fixedly clamped to the rotating main shaft in a rotation direction of the rotating main shaft relative to the fixed shaft assembly, so as to constrain the moving member to rotate synchronously with the rotating main shaft.

[0024] In some examples, optionally, the rotating spindle further includes a sliding keyway located within the hollow shaft cavity; the movable member has a radial cam inserted into the sliding keyway; the radial cam and the sliding keyway are fixed in relative positions in the rotational direction of the rotating spindle relative to the fixed shaft assembly, and the sliding keyway provides a fitting margin in the axial direction for the radial cam to slide.

[0025] In some examples, optionally, the rotating main shaft also includes an inner liner column shell fixed in the hollow shaft cavity, and the sliding keyway is opened on the cylindrical side wall of the inner liner column shell; the movable member includes a transmission slider located in the shell cavity of the inner liner column shell, and the radial cam protrudes from the transmission slider toward the first slider side wall of the sliding keyway.

[0026] In some examples, optionally, the movable tooth row component further includes a movable tooth transmission arm extending into the hollow shaft cavity; the movable component realizes a transmission connection with the movable tooth row component by fixedly clamping the movable tooth transmission arm in the axial direction, and the fixed clamping constrains the movable tooth transmission arm to induce the cutting movement of the movable tooth in response to the reciprocating movement of the movable component.

[0027] In some examples, optionally, the movable member has a holding groove, the movable tooth transmission arm is inserted into the holding groove, the relative positions of the holding groove and the movable tooth transmission arm in the axial direction are fixed, and the groove width dimension of the holding groove perpendicular to the axial direction has an expansion margin relative to the movable tooth transmission arm.

[0028] In some examples, optionally, the rotating main shaft also includes a liner column shell fixed in the hollow shaft cavity, and the shell cavity of the liner column shell is connected to the mounting slit; the movable member includes a transmission slider located in the shell cavity of the liner column shell, and the clamping groove is located on the second slider side wall of the transmission slider facing the mounting slit.

[0029] In some examples, optionally, the moving member and the fixed axis assembly are transmission-connected via eccentric contact, and a contact position of the eccentric contact deviates from a rotation axis of the rotating main shaft relative to the fixed axis assembly.

[0030] In some examples, optionally, the moving member includes an inclined turntable, which is inclined relative to the rotation axis, and the turntable center of the inclined turntable is coaxially arranged with the rotation axis; the fixed axis assembly has an eccentric protrusion that deviates from the rotation axis, and the eccentric protrusion contacts the turntable edge of the inclined turntable; wherein the inclined turntable generates the reciprocating movement in response to the change in contact position of the turntable edge with the eccentric protrusion during the rotation.

[0031] In some examples, optionally, the fixed axis assembly includes a fixed axis body and a cylindrical sleeve, the fixed axis body having a non-rotating axis end located outside the hollow axis cavity, and a guide axis end inserted into the hollow axis cavity, and the cylindrical sleeve is fixedly mounted on the guide axis end; the eccentric protrusion includes an axis end arc boss located on the end face of the guide axis end, and a sleeve arc protrusion located on the inner wall of the box cavity of the cylindrical sleeve; the inclined turntable is located in the cylindrical sleeve, and during the rotation: the first position area of ​​the turntable edge of the inclined turntable contacts the axis end arc boss to cause the moving member to move in the The first translation occurs in the axial direction away from the fixed axis assembly; the second position area of ​​the turntable edge of the inclined turntable contacts the arc surface protrusion of the sleeve box to cause the movable member to undergo a second translation in the axial direction close to the fixed axis assembly; the starting position of the first position area and the ending position of the second position area are both the first edge position of the turntable edge farthest from the guide shaft end in the axial direction; the ending position of the first position area and the starting position of the second position area are both the second edge position of the turntable edge closest to the guide shaft end in the axial direction.

[0032] In some examples, optionally, the moving member and the fixed axis assembly are transmission-connected by screwing together, and a screwing axis of the screwing together is tilted relative to the axial direction.

[0033] In some examples, optionally, the movable member includes a guide shaft, the guide shaft having an inclined annular groove, the center axis of the inclined annular groove being inclined relative to the axial direction, and the screwing axis of the screwing fit coincides with the center axis of the inclined annular groove; the fixed axis assembly includes an inner sleeve and a guide ball, the inner sleeve is provided with a ball accommodating through-hole penetrating the cylinder wall, the guide ball can be rotatably accommodated in the ball accommodating through-hole and cooperate with the spherical surface of the inclined annular groove covered by the inner sleeve; wherein the spherical cooperation of the guide ball and the inclined annular groove is used to guide the screwing of the movable member relative to the fixed axis assembly, and the movable member generates the reciprocating movement in response to the change in the spherical cooperation position of the guide ball and the inclined annular groove.

[0034] In some examples, optionally, the fixed axis assembly further includes an outer sleeve, and the outer sleeve is sleeved on the outside of the inner sleeve and covers the guide balls.

[0035] In some examples, optionally, the movable member further includes a transmission slider for transmission connection with the movable gear row member and fixedly clamped to the rotating main shaft in the rotation direction of the rotating main shaft relative to the fixed axis assembly; the transmission slider is located outside the cylindrical box, and the movable member further includes a connecting shaft, and the connecting shaft penetrates the cylindrical box and is connected between the center of the turntable of the inclined turntable and the transmission slider.

[0036] In some examples, optionally, the rotating spindle includes at least two mounting slits arranged at preset phase intervals; the cutting assembly includes at least two groups of the fixed tooth row components and the movable tooth row components, and each group of the fixed tooth row components and the movable tooth row components is inserted into a corresponding one of the mounting slits.

[0037] In some examples, optionally, the rotating main shaft includes a first semi-cylindrical shell and a second semi-cylindrical shell, the cylinders of the first semi-cylindrical shell and the second semi-cylindrical shell are complementary, the first semi-cylindrical shell and the second semi-cylindrical shell are snap-fitted and spliced, the seam between the first semi-cylindrical shell and the second semi-cylindrical shell fixes and clamps a pair of the cleaning brushes, and the hollow shaft cavity is surrounded by the first semi-cylindrical shell and the second semi-cylindrical shell; the rotating main shaft includes two mounting slits respectively opened in the first semi-cylindrical shell and the second semi-cylindrical shell, the phase interval between the two mounting slits is 180°, and the two mounting slits are located in the symmetry plane between the pair of cleaning brushes.

[0038] An embodiment of the present application provides a sweeping robot that may include a mobile chassis, an integrated cavity shell supported by the mobile chassis, and a roller brush assembly as described in the above embodiment, wherein the roller brush assembly is installed in the integrated cavity shell, wherein:

[0039] The movable chassis has a chassis opening, the integrated chamber shell has a hoisting window exposed at the chassis opening, and a suction window for communicating with a dust collection mechanism, and the installation position of the roller brush assembly in the integrated chamber shell enables the cleaning brush to extend out of the hoisting window during the rotation to perform a hoisting operation;

[0040] The integrated cavity shell is fixedly equipped with a drive motor, the first shaft end of the rotating main shaft is transmission-connected to the drive motor, the fixed shaft assembly is inserted into the hollow shaft cavity of the rotating main shaft from the second shaft end opposite to the first shaft end, and the fixed shaft assembly is fixed in the integrated cavity shell.

[0041] Based on the above embodiment, the rotating main shaft of the roller brush assembly can have a hollow shaft cavity and a mounting slit extending from the outer shaft wall to the hollow shaft cavity, wherein the mounting slit is inserted with a fixed tooth row component and a movable tooth row component, and the hollow shaft cavity is equipped with a movable component. Based on the transmission connection between the movable component and the fixed shaft assembly inserted into the hollow inner cavity, the movable component can reciprocate in the axial direction during the rotation of the rotating main shaft relative to the fixed shaft assembly, and based on the transmission connection between the movable component and the movable tooth row component, the reciprocating movement of the movable component can cause the movable teeth of the movable tooth row component to perform a cutting motion that is reciprocally displaced relative to the fixed teeth of the fixed tooth row component. Therefore, by the reciprocating displaced cutting motion of the movable teeth protruding from the outer shaft wall relative to the fixed teeth, the roller brush assembly can have the ability to autonomously and actively cut the filamentous dirt wrapped around the outer shaft wall of the rotating main shaft (i.e., automatically clean the filamentous dirt). This helps to improve the cleaning efficiency of filamentous dirt, reduce the difficulty of cleaning filamentous dirt, and thus improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0043] FIG1 is a schematic structural diagram of a roller brush assembly for a sweeping robot in an embodiment of the present application in a disassembled state;

[0044] FIG2 is a schematic structural diagram of a roller brush assembly for a sweeping robot in an assembled state from a first perspective according to an embodiment of the present application;

[0045] FIG3 is a structural diagram of a roller brush assembly for a sweeping robot in an assembled state from a second perspective according to an embodiment of the present application;

[0046] FIG4 is a cross-sectional view of a roller brush assembly for a sweeping robot in an assembled state according to an embodiment of the present application;

[0047] FIG5 is a schematic diagram of a partial structure of a rotating main shaft of a roller brush assembly for a sweeping robot according to an embodiment of the present application;

[0048] FIG6 is a schematic structural diagram of a moving component of a roller brush assembly for a sweeping robot according to an embodiment of the present application;

[0049] FIG7 is a schematic diagram of the assembly relationship between the moving member and the rotating spindle of the roller brush assembly of the sweeping robot according to an embodiment of the present application;

[0050] FIG8 is a schematic diagram of the assembly relationship between the moving component and the fixed axis component of the roller brush assembly of the sweeping robot according to an embodiment of the present application;

[0051] FIG9 is a schematic diagram of the partial assembly structure of the moving member and the fixed axis assembly of the roller brush assembly for the sweeping robot in an embodiment of the present application;

[0052] FIG10 is a schematic structural diagram of an alternative solution for a moving member and a fixed axis assembly of a roller brush assembly for a sweeping robot according to an embodiment of the present application;

[0053] FIG11 is a schematic diagram of a partial structure of a sweeping robot in an embodiment of the present application;

[0054] FIG12 is a schematic structural diagram of the integrated cavity shell of the sweeping robot in an embodiment of the present application;

[0055] FIG13 is a schematic diagram of the docking structure between the integrated chamber shell and the dust collecting component shown in FIG12 .

[0056] Description of Reference Numerals

[0057] 10 rotating spindle; 100 hollow shaft cavity; 11 first semi-cylindrical shell; 12 second semi-cylindrical shell; 13 limiting end cover; 14 driving end cover; 15 mounting slit; 16 mounting boss; 17 guide comb; 18 inner liner shell; 180 sliding keyway; 181 inner liner shell flap; 182 half-slot notch; 191 screw hole seat; 192 screw-connected boss; 20 fixed axis assembly; 21 fixed axis body; 210 ball bearing through hole; 211 anti-rotation shaft end; 212 guide shaft end; 213 limiting through hole; 219 avoidance ring groove; 22 cylindrical sleeve; 221 semi-cylindrical box body; 222 semi-cylindrical box cover; 223 limiting hole column; 23 eccentric protrusion; 231 shaft end arc boss; 232 sleeve arc protrusion; 21' inner sleeve; 22' guide ball; 23' outer sleeve Cylinder; 30 moving component; 31 transmission slider; 311 radial cam; 315 holding groove; 32 tilting turntable; 32' guide shaft; 320 tilting ring groove; 33 connecting shaft; 40 cleaning brush; 50 cutting assembly; 51 fixed gear row component; 510 fixed gear teeth; 511 fixed gear mounting strip; 512 fixed gear mounting lug; 52 moving gear row component; 520 moving gear teeth; 521 moving gear mounting strip; 522 moving gear mounting lug; 523 moving gear transmission arm; 53 mounting stud; 60 integrated cavity shell; 600 roller brush cavity; 61 winch window; 62 suction window; 63 support shaft seat; 64 power shaft seat; 65 anti-rotation notch; 66 channel assembly; 70 moving chassis; 700 chassis opening; 81 driving motor; 82 reduction mechanism; 90 filamentous dirt. DETAILED DESCRIPTION

[0058] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings and examples. It should be understood that the described examples are only some examples of the present invention, not all examples. All other examples derived by persons of ordinary skill in the art based on the examples of the present invention fall within the scope of protection of the present invention.

[0059] Figure 1 is a schematic structural diagram of a roller brush assembly for a sweeping robot in an embodiment of the present application in a disassembled state. Figure 2 is a schematic structural diagram of a roller brush assembly for a sweeping robot in an assembled state from a first perspective in an embodiment of the present application. Figure 3 is a schematic structural diagram of a roller brush assembly for a sweeping robot in an assembled state from a second perspective in an embodiment of the present application. Figure 4 is a cross-sectional view of a roller brush assembly for a sweeping robot in an assembled state in an embodiment of the present application. Referring to Figures 1 to 4, in an embodiment of the present application, the roller brush assembly for a sweeping robot may include a rotating spindle 10, a cutting assembly 50, a fixed axis assembly 20, and a moving member 30.

[0060] The rotating spindle 10 can be equipped with a cleaning brush 40 radiating from the outer shaft wall, and the rotating spindle 10 also has a hollow shaft cavity 100 (please pay special attention to Figure 4), and a mounting slit 15 passing through the outer shaft wall to the hollow shaft cavity 100, wherein the mounting slit 15 extends along the axial direction of the rotating spindle 10, and the mounting slit 15 is staggered with the cleaning brush 40.

[0061] The cutting assembly 50 includes a fixed tooth row component 51 fixedly inserted into the mounting slot 15, and a movable tooth row component 52 movably inserted into the mounting slot 15. The fixed tooth row component 51 includes a plurality of fixed teeth 510 protruding from the outer shaft wall, and the movable tooth row component 52 includes a plurality of movable teeth 520 protruding from the outer shaft wall.

[0062] The fixed shaft assembly 20 is inserted into the hollow shaft cavity 100;

[0063] The moving member 30 is movably mounted in the hollow shaft cavity 100 along the axial direction, and the moving member 30 is transmission-connected to the fixed shaft assembly 20 and the movable gear member 52;

[0064] In which, during the period when the rotating main shaft 10 drives the cleaning brush 40, the cutting assembly 50 and the movable member 30 to rotate relative to the fixed axis assembly 20, the transmission connection causes the movable member 30 to produce reciprocating movement in the axial direction, and the reciprocating movement drives the movable teeth 520 to perform a reciprocating and offset cutting movement in the axial direction relative to the fixed teeth 510.

[0065] In the diagrammatic representation of the embodiment of the present application, the rotating spindle 10 includes a first semi-cylindrical shell 11 and a second semi-cylindrical shell 12 as an example, wherein the cylindrical surfaces of the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 are complementary, and the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 are snap-fitted together. For example, the snap-fitting connection of the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 can be fixed by snap-fitting at the edges of the cylindrical surfaces and / or screw-locking. The diagrammatic expression of the embodiment of the present application shows that the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 both have screw hole seats 191 for screws to pass through, and screw bosses 192 that can be threadedly connected to the screws. The screw hole seats 191 of the first semi-cylindrical shell 11 can be positioned and docked with the screw bosses 192 of the second semi-cylindrical shell 12. Similarly, the screw hole seats 191 of the second semi-cylindrical shell 12 can also be positioned and docked with the screw bosses 192 of the first semi-cylindrical shell 11. Thus, by positioning and docking the screw hole seats 191 and the screw bosses 192 formed at different positions of the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12, and fixing the screws on each pair of screw hole seats 191 and screw bosses 192 that are positioned and docked, the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 can be fixed by snapping and splicing.

[0066] In this case, a pair of joints between the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 can respectively fix and clamp a pair of cleaning brushes 40. It can be seen from the diagrammatic expression of the embodiment of the present application that the joint between the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 can be not limited to a straight line shape, but can be set to a broken line shape, so that the elongated cleaning brush 40 is constrained by the broken line joint between the first semi-cylindrical body 11 and the second semi-cylindrical body 12 to be bent. Such a bent shape can cause the discrete dirt brushed by the cleaning brush 40 to converge to the middle area of ​​the elongated strip during the rotation of the rotating main shaft 10.

[0067] For the rotating spindle 10 including the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12, wherein the hollow shaft cavity 100 is surrounded by the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12, that is, the hollow shaft cavity 100 of the rotating spindle 10 may include two semi-cylindrical cavities of the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 that are interconnected, and the mounting slit 15 of the rotating spindle 10 may include two mounting slits 15 respectively opened in the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12. Preferably, when the first semi-cylindrical body 11 and the second semi-cylindrical body 12 are in an assembled state of being interlocked and spliced ​​with each other, the phase interval between the two mounting slits 15 is 180°, and the two mounting slits 15 are located in the symmetric plane between the pair of cleaning brushes 40.

[0068] It can be understood that the embodiment of the present application does not intend to make unnecessary restrictions on the shaft composition of the rotating main shaft 10, that is, the shaft of the rotating main shaft 10 is not limited to a physical form of a first semi-cylindrical shell 11 and a second semi-cylindrical shell 12 that are snapped together, but can adopt any physical form that can support the fixed installation of the cleaning brush 40, with a hollow shaft cavity 100 and a mounting slit 15.

[0069] Moreover, the embodiments of the present application do not intend to limit the number of cleaning brushes 40 and mounting slits 15, that is: if the cleaning brush 40 is not fixed by the seam between the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12, then the number of cleaning brushes 40 may not be limited to two; and, only one of the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 may have a mounting slit 15, or, the number of mounting slits 15 opened in the first semi-cylindrical shell 11 and / or the second semi-cylindrical shell 12 may be more than one, therefore, the number of mounting slits 15 of the rotating spindle 10 may not be limited to two, but may also be one or more than two.

[0070] As shown in Figure 1, the cutting assembly 50 includes a fixed tooth row component 51 fixedly inserted in the mounting slot 15, and a movable tooth row component 52 movably inserted in the mounting slot 15, wherein the fixed tooth row component 51 and the movable tooth row component 52 can rotate synchronously with the rotating main shaft 10, and the fixed tooth row component 51 and the movable tooth row component 52 can be constrained by the slot width size of the mounting slot 15 in the rotation direction of the rotating main shaft 10 to be close to each other and stacked, the fixed tooth row component 51 may include a plurality of fixed teeth 510 protruding from the outer shaft wall of the rotating main shaft 10 at the mounting slot 15, and the movable tooth row component 52 may include a plurality of movable teeth 520 protruding from the outer shaft wall of the rotating main shaft 10 at the mounting slot 15, and the fixed tooth gaps between the plurality of fixed teeth 510 and the movable tooth gaps between the plurality of movable teeth 520 may be the same, or may be different as shown in the diagram of the embodiment of the present application.

[0071] In the embodiment of the present application, the fixed tooth row component 51 may include a fixed tooth mounting bar 511 fixed in the mounting slit 15 . For example, as shown in Figure 1, the rotating spindle 10 may further include a mounting boss 16 located in the hollow shaft cavity 100, and the mounting boss 16 is used to be threadedly connected to the mounting stud 53 penetrated into the hollow inner cavity 100. The fixed gear row component 51 may further include a fixed gear mounting lug 512 that extends from the inner side of the fixed gear mounting strip 511 close to the hollow shaft cavity 100 into the hollow shaft cavity 100. The fixed gear mounting lug 512 may be provided with a circular hole that is compatible with the mounting stud 53, and the mounting stud 53 may be penetrated into the circular hole of the fixed gear mounting lug 512, and the mounting stud 53 is plugged into the circular hole of the fixed gear mounting lug 512 so that the fixed gear mounting lug 512 is fixedly connected to the rotating spindle 10 in the hollow shaft cavity 100. Thus, the fixed gear mounting strip 511 can be fixed in the mounting slit 15 through the fixed connection of the fixed gear mounting lug 512 with the rotating spindle 10 in the hollow shaft cavity 100. In addition, the fixed gear teeth 510 can protrude from the outer side of the fixed gear mounting bar 511 close to the outer wall of the rotating main shaft 10 outside the outer wall of the rotating main shaft 10 .

[0072] In an embodiment of the present application, as shown in FIG. 1 , the movable gear row component 52 may include a movable gear mounting bar 521 movably mounted in the mounting slit 15 . For example, the movable gear row component 52 may further include a movable gear mounting lug 522 extending from the movable gear mounting strip 521 close to the inner side edge of the hollow shaft cavity 100 into the hollow shaft cavity 100, and the movable gear mounting lug 522 is provided with a long hole extending in the axial direction of the rotating main shaft 10 (i.e., an extension of the mounting slit 15), and the above-mentioned mounting stud 53 may also be passed through the long hole of the movable gear mounting lug 522, and the sliding fit between the mounting stud 53 and the long hole of the movable gear mounting lug 522 enables the movable gear mounting lug 522 to be movably assembled with the rotating main shaft 10 in the axial direction in the hollow shaft cavity 100, thereby, the movable gear mounting strip 521 can be movably mounted in the mounting slit 15 by the movable assembly of the movable gear mounting lug 522 with the rotating main shaft 10 in the axial direction in the hollow shaft cavity 100. In addition, the movable gear teeth 520 may protrude from the outer side of the movable gear mounting bar 521 close to the outer wall of the rotating main shaft 10 and out of the outer wall of the rotating main shaft 10 .

[0073] In the case where both the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 are provided with a mounting slit 15, the cutting assembly 50 may include two sets of fixed tooth row components 51 and movable tooth row components 52, and each set of fixed tooth row components 51 and movable tooth row components 52 is inserted into a corresponding mounting slit 15. If the phase interval between the two mounting slits 15 is 180°, and the two mounting slits 15 are located in the symmetric plane between a pair of cleaning brushes 40, then the phase interval between the two sets of fixed tooth row components 51 and movable tooth row components 52 is 180°, and each set of fixed tooth row components 51 and movable tooth row components 52 and each cleaning brush 40 may have a phase interval of approximately 90°.

[0074] That is, the cutting assembly 50 may include a number of fixed tooth row members 51 and movable tooth row members 52 equal to the number of mounting slots 15. Since the number of mounting slots 15 of the rotating spindle 10 is not limited to two, the number of sets of fixed tooth row members 51 and movable tooth row members 52 included in the cutting assembly 50 is also not limited to two. Preferably, the rotating spindle 10 includes at least two mounting slots 15 separated by a predetermined phase interval (e.g., 180°, or any angle between 90° and 180°), and the cutting assembly 50 includes at least two sets of fixed tooth row members 51 and movable tooth row members 52.

[0075] As shown in Figures 1 to 4, the fixed axis assembly 20 is inserted into the hollow shaft cavity 100 of the rotating spindle 10, wherein the fixed axis assembly 20 is inserted into the hollow shaft cavity 100 of the rotating spindle 10 so that there is a limit constraint in the axial direction between the fixed axis assembly 20 and the rotating spindle 10, and there is no constraint between the fixed axis assembly 20 and the rotating spindle 10 in the rotation direction of the rotating spindle 10.

[0076] Specifically, the rotating spindle 10 may have a first shaft end for transmission connection with the drive motor. For example, the first shaft end of the rotating spindle 10 may be fixedly equipped with a drive end cover 14 for transmission connection with the drive motor, so that the rotating spindle 10 can rotate in response to the power output generated by the drive motor.

[0077] Furthermore, the second shaft end of the rotating spindle 10 opposite to the first shaft end can be rotatably supported by the fixed shaft assembly 20, that is, the fixed shaft assembly 20 can be inserted into the hollow shaft cavity 100 of the rotating spindle 10 from the second shaft end opposite to the first shaft end, and the fixed shaft assembly 20 can have a rotation-stopping shaft end 211 located outside the second shaft end of the rotating spindle 10, and by restraining the rotation-stopping shaft end 211, the fixed shaft assembly 20 can be prevented from rotating with the rotating spindle 10. In addition, in order to avoid positional offset between the fixed shaft assembly 20 and the rotating spindle 10 in the axial direction, the second shaft end of the rotating spindle 10 can be equipped with a limiting end cover 13, and the rotation-stopping shaft end 211 of the fixed shaft assembly 20 can pass through the limiting end cover 13 and be located outside the second shaft end of the rotating spindle 10.

[0078] As shown in Figures 1 and 4 , the mobile member 30 is movably mounted within the hollow shaft cavity 100 of the rotating spindle 10 along the axial direction of the rotating spindle 10. The mobile member 30 is constrained to rotate synchronously with the rotating spindle 10. For example, the mobile member 30 is fixedly engaged with the rotating spindle 10 in the direction of rotation of the rotating spindle 10 relative to the fixed axis assembly 20 to constrain the mobile member 30 to rotate synchronously with the rotating spindle 10. Furthermore, the mobile member 30 is in driving connection with the fixed axis assembly 20 and the movable gear assembly 52.

[0079] For example, the moving member 30 may be in transmission connection with the inner cavity portion of the fixed shaft assembly 20 located in the hollow shaft cavity 100 .

[0080] For example, the movable gear row component 52 may also include a movable gear transmission arm 523 extending from the movable gear mounting bar 521 close to the inner side edge of the hollow shaft cavity 100 into the hollow shaft cavity 100, and the movable component 30 may realize a transmission connection with the movable gear row component 52 by fixing and clamping the movable gear transmission arm 523 in the axial direction of the rotating main shaft 10.

[0081] For the rotating main shaft 10 including the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12, the fixed axis assembly 20 and the movable member 30 can be pre-installed with any one of the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 when the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 are in a disassembled state separated from each other, and then the assembly in the hollow shaft cavity 100 of the rotating main shaft 10 is completed by snapping and splicing the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12.

[0082] During the period when the rotating spindle 10 drives the cleaning brush 40, the cutting assembly 50, and the moving member 30 to rotate relative to the fixed axis assembly 20, the transmission connection between the moving member 30, the fixed axis assembly 20, and the movable tooth row member 52 can cause the moving member 30 to reciprocate in the axial direction of the rotating spindle 10. Through this reciprocating movement, the moving member 30 drives the movable teeth 520 to perform a cutting motion that is reciprocally offset relative to the fixed teeth 510 in the axial direction of the rotating spindle 10. For example, for each rotation of the rotating spindle 10, the moving member 30 can reciprocate once and drive the movable teeth 520 to complete a reciprocating offset relative to the fixed teeth 510.

[0083] Based on the above structure, the rotating spindle 10 of the roller brush assembly provided in the embodiment of the present application can have a hollow shaft cavity 100, and a mounting slit 15 that passes through the outer shaft wall to the hollow shaft cavity 100, wherein the mounting slit 15 is inserted with a fixed tooth row component 51 and a movable tooth row component 52, and the hollow shaft cavity 100 of the rotating spindle 10 has a built-in moving member 30. Based on the transmission connection between the moving member 30 and the fixed shaft assembly 20 inserted into the hollow inner cavity 100 of the rotating spindle 10, the moving member 30 can reciprocate along the axial direction of the rotating spindle 10 during the rotation of the rotating spindle 10 relative to the fixed shaft assembly 20, and based on the transmission connection between the moving member 30 and the movable tooth row component 52, the reciprocating movement of the moving member 30 can cause the movable teeth 520 of the movable tooth row component 52 to perform a cutting motion that is reciprocally displaced relative to the fixed teeth 510 of the fixed tooth row component 51. Therefore, through the reciprocating, offset cutting motion of the movable teeth 520 protruding from the outer wall of the rotating main shaft 10 relative to the fixed teeth 510, the roller brush assembly has the ability to autonomously and actively cut (i.e., automatically clean) the filamentary dirt 90 wrapped around the outer wall of the rotating main shaft 10. This helps improve the cleaning efficiency of the filamentary dirt 90, reduces the difficulty of cleaning the filamentary dirt 90, and thus enhances the user experience.

[0084] Figure 5 is a schematic diagram of a partial structure of the rotating spindle of the roller brush assembly for a sweeping robot according to an embodiment of the present application. Referring to Figure 5 , in this embodiment of the present application, the rotating spindle 10 may further include a plurality of guide comb teeth 17 spaced axially along the outer shaft wall, so as to form a drainage channel spanning the mounting slit 15 between each two adjacent guide comb teeth 17. For example, the guide comb teeth 17 may be spaced at opposite edges of the mounting slit 15 in the widthwise direction of the slit.

[0085] In this case, the fixed teeth 510 and the guide comb teeth 17 are aligned in the axial direction to prevent the fixed teeth 510 from blocking the drainage channel. For example, the guide comb teeth 17 can have comb sidewalls that are flush with the slit edges, and the fixed teeth 510 can be aligned and abutted against the comb sidewall of the guide comb teeth 17 at one side of the slit edge, and the movable teeth 520 can be slidably engaged with the comb sidewall of the guide comb teeth 17 at the other side of the slit edge.

[0086] The reciprocating offset movement stroke of the movable tooth 520 relative to the fixed tooth 510 can be greater than the channel width of the guide channel in the axial direction of the rotating main shaft 10. Preferably, the movement stroke can be greater than the sum of the comb tooth width of the guide comb 17 in the axial direction of the rotating main shaft 10 and the channel width of the two guide channels.

[0087] Please refer to Figure 2 and Figure 3 while referring to Figure 5. Based on the drainage channel formed by the guide comb teeth 17, the filamentous dirt 90 can cross the mounting slit 15 in a posture perpendicular to the mounting slit 15, so that the filamentous dirt 90 can be more easily cut off by the movable teeth 520 that perform cutting motion along the mounting slit 15, thereby improving the cutting efficiency of the roller brush assembly in autonomously and actively cutting the filamentous dirt 90 wrapped around the outer shaft wall of the rotating main shaft 10.

[0088] In order to better understand the driving principle of the cutting motion of the movable teeth 520 by the transmission connection between the moving member 30 and the fixed axis assembly 20 and the movable tooth row member 52, an example structure will be used for illustration below.

[0089] Figure 6 is a schematic diagram of the structure of the movable member of the roller brush assembly for a sweeping robot according to an embodiment of the present application. Referring to Figure 6 , in this embodiment of the present application, the movable member 30 may include a transmission slider 31, a tilting turntable 32, and a connecting shaft 33 connected between the transmission slider 31 and the tilting turntable 32.

[0090] The transmission slider 31 is used to achieve synchronous rotation constraint between the moving member 30 and the rotating spindle 10, and to achieve a transmission connection between the moving member 30 and the movable gear member 52. For example, the transmission slider 31 may have a radial cam 311 for achieving synchronous rotation constraint between the moving member 30 and the rotating spindle 10, and a retaining groove 315 for achieving a transmission connection between the moving member 30 and the movable gear member 52.

[0091] The tilting turntable 32 is used to realize the transmission cooperation between the moving component 30 and the fixed axis assembly 20 .

[0092] FIG7 is a schematic diagram illustrating the assembly relationship between the movable member and the rotating spindle of the roller brush assembly for a sweeping robot according to an embodiment of the present application. Referring to FIG7 and referring back to FIG1 and FIG6 , in an embodiment of the present application, the rotating spindle 10 may further include a sliding keyway 180 located within the hollow shaft cavity 100 , into which the radial key 311 of the movable member 30 may be inserted. The radial key 311 and the sliding keyway 180 are fixed relative to each other in the rotational direction of the rotating spindle 10 relative to the fixed axis assembly 20 , and the sliding keyway 180 provides a fitting margin in the axial direction of the rotating spindle 10 for the radial key 311 to slide.

[0093] Thus, through the slidable insertion of the radial cam 311 in the sliding keyway 180 , the movable member 30 is fixedly clamped with the rotating spindle 10 in the rotation direction of the rotating spindle 10 relative to the fixed axis assembly 20 to constrain the movable member 30 to rotate synchronously with the rotating spindle 10 .

[0094] Specifically, the rotating spindle 10 may further include a liner cylindrical shell 18 fixed in the hollow shaft cavity 100, and the sliding keyway 180 may be provided in the cylindrical sidewall of the liner cylindrical shell 18. In this case, the transmission slider 31 of the moving member 30 may be located in the shell cavity of the liner cylindrical shell 18, and the radial protruding key 311 may protrude from the transmission slider 31 toward the first slider sidewall of the sliding keyway 180.

[0095] For the rotating main shaft 10 including the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12, the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 can both include an inner lining shell flap 181 having a half-groove notch 182, and when the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 are in an assembled state of snap-fitting and splicing, the inner lining shell flap 181 of the first semi-cylindrical shell 11 and the second semi-cylindrical shell 12 can be snap-fitted and spliced ​​to form the above-mentioned inner lining shell 18, and then, the half-groove notch 182 can be docked to form the above-mentioned sliding keyway 180.

[0096] As mentioned above, the movable gear row component 52 may further include a movable gear transmission arm 523 extending into the hollow shaft cavity 100 . In this case, referring back to FIG. 1 , FIG. 4 and FIG. 6 , the movable gear transmission arm 523 of the movable gear row component 52 may be inserted into the retaining groove 315 of the movable component 30 .

[0097] Among them, the relative positions of the clamping groove 315 and the movable tooth transmission arm 523 in the axial direction of the rotating main shaft 10 are fixed, so that the movable member 30 can realize the transmission connection with the movable tooth row member 52 by fixedly clamping the movable tooth transmission arm 523 in the axial direction of the rotating main shaft 10. The fixed clamping can constrain the movable tooth transmission arm 523 to: trigger the cutting movement of the movable tooth 520 in response to the reciprocating movement of the movable member 30.

[0098] Moreover, the groove width dimension of the clamping groove 315 in the axial direction perpendicular to the rotating main shaft 10 has an expansion margin relative to the movable gear transmission arm 523 to prevent the movable gear transmission arm 523 from falling off from the clamping groove 315 in the axial direction perpendicular to the rotating main shaft 10.

[0099] If the rotating spindle 10 has the liner column housing 18 as described above, and the transmission slider 31 of the moving member 30 is located in the liner column housing 18, then the housing cavity of the liner column housing 18 is in communication with the mounting slit 15, and the retaining groove 315 is located on the second slider side wall of the transmission slider 31 facing the mounting slit 15. In the diagrammatic representation of the embodiment of the present application, the transmission slider 31 is taken as a rectangular block as an example. In this case, the first slider side wall described above and the second slider side wall described here can be two sets of mutually perpendicular wall surfaces of the rectangular block.

[0100] Figure 8 is a schematic diagram illustrating the assembly relationship between the movable member and the fixed axis assembly of the roller brush assembly for a sweeping robot according to an embodiment of the present application. Figure 9 is a schematic diagram illustrating the partial assembly structure of the movable member and the fixed axis assembly of the roller brush assembly for a sweeping robot according to an embodiment of the present application. Please refer to Figures 8 and 9 while also referring to Figures 1 and 4. In the embodiment of the present application, the movable member 30 and the fixed axis assembly 20 can be connected in a transmission manner through eccentric contact, and the contact position of the eccentric contact is offset from the rotation axis of the rotating main shaft 10 relative to the fixed axis assembly 20.

[0101] Specifically, the tilting turntable 32 of the moving member 30 is tilted relative to the rotation axis of the rotating spindle 10, and the center of the tilting turntable 32 is coaxially arranged with the rotation axis of the rotating spindle 10. In other words, the axis of the connecting shaft 33 of the moving member 30 can coincide with the rotation axis of the rotating spindle 10, the center of the tilting turntable 32 can be coaxially arranged with the axis of the connecting shaft 33, and the tilting turntable 32 can be tilted relative to the axis of the connecting shaft 33.

[0102] In this case, the fixed axis assembly 20 may have an eccentric protrusion 23 that is offset from the rotation axis, and the eccentric protrusion 23 contacts the turntable edge of the inclined turntable 32 .

[0103] Thus, the inclined turntable 32 can produce reciprocating movement in response to the change in the contact position of the turntable edge with the eccentric protrusion 23 during the rotation of the rotating spindle 10 relative to the fixed axis assembly 20, thereby causing the moving component 30 including the inclined turntable 32 to produce reciprocating movement to trigger the movable teeth 520 to perform cutting motion.

[0104] In the embodiment of the present application, as a preferred solution, the fixed axis assembly 20 may include a fixed axis body 21 and a cylindrical sleeve 22 .

[0105] The fixed shaft body 21 has the aforementioned anti-rotation shaft end 211 located outside the hollow shaft cavity 100, and further has a guide shaft end 212 inserted into the hollow shaft cavity 100. Furthermore, the shaft section of the fixed shaft body 21 located within the hollow shaft cavity 100 between the anti-rotation shaft end 211 and the guide shaft end 212 may further have an annular groove 219 for avoiding the screw hole seat 191 and the screw-connecting boss 192.

[0106] The cylindrical sleeve 22 is fixedly mounted on the guide shaft end 212 of the fixed shaft body 21, wherein the fixed mounting of the cylindrical sleeve 22 on the guide shaft end 212 means that the relative positions of the cylindrical sleeve 22 and the guide shaft end 212 in both the axial direction and the rotational direction are fixed. For example, the cylindrical sleeve 22 may include a semi-cylindrical box body 221 and a semi-cylindrical box cover 222, wherein the semi-cylindrical box body 221 and the semi-cylindrical box cover 222 may be connected by a snap fit to wrap around the guide shaft end 212 of the fixed shaft body 21, and the guide shaft end 212 of the fixed shaft body 21 may have a limiting through-hole 213, and the cylindrical sleeve 22 has a limiting hole column 223 disposed at least in the semi-cylindrical box body 221, so that the relative positions of the cylindrical sleeve 22 and the guide shaft end 212 in both the axial direction and the rotational direction can be fixed by a connecting member (such as a pin or a stud) passing through the limiting through-hole 213 and the limiting hole column 223.

[0107] In this case, the eccentric protrusion 23 of the fixed axis assembly 20 may include an end cambered boss 231 located at the end face of the guide axis end 212 of the fixed axis body 21, and a casing cambered projection 232 located at the inner wall of the box cavity of the cylindrical casing 22 (e.g., a semi-cylindrical casing 221). Furthermore, the tilting turntable 32 of the movable member 30 is located in the cylindrical casing 22. For example, the tilting turntable 32 may be placed in the semi-cylindrical casing 221 when the semi-cylindrical casing 221 and the semi-cylindrical casing cover 222 are separated. Then, the tilting turntable 32 is enclosed in the cylindrical casing 22 by the snap-fit ​​engagement of the semi-cylindrical casing 221 and the semi-cylindrical casing cover 222. Furthermore, the transmission slider 31 of the movable member 30 is located outside the cylindrical casing 22, and the connecting shaft 33 of the movable member 30 penetrates the cylindrical casing 22.

[0108] Based on the above structure, during the period when the rotating main shaft 10 drives the cleaning brush 40, the cutting assembly 50 and the moving member 30 to rotate relative to the fixed axis assembly 20:

[0109] The first position area of ​​the turntable edge of the inclined turntable 32 contacts the shaft end arc-surface boss 231, which can cause the moving member 30 to perform a first translation in the axial direction of the rotating main shaft 10 away from the fixed axis assembly 20;

[0110] The second position area of ​​the turntable edge of the inclined turntable 32 contacts the arc-surface protrusion 232 of the sleeve box, which can cause the movable member 30 to undergo a second translation in the axial direction of the rotating main shaft 10 close to the fixed axis assembly 20, that is, the second translation is opposite to the first translation.

[0111] As shown in Figure 6, the starting position of the above-mentioned first position area and the ending position of the above-mentioned second position area can both be the first edge position Pa of the turntable edge of the inclined turntable 32 in the axial direction of the rotating main shaft 10, which is farthest from the guide shaft end 212 (that is, closest to the transmission slider 31 in the axial direction of the connecting shaft 33); and the ending position of the above-mentioned first position area and the starting position of the above-mentioned second position area can both be the second edge position Pb of the turntable edge of the inclined turntable 32 in the axial direction of the rotating main shaft 10, which is closest to the guide shaft end 212 (that is, closest to the transmission slider 31 in the axial direction of the connecting shaft 33).

[0112] Figure 10 is a schematic diagram of an alternative structure for the moving member and fixed axis assembly of the roller brush assembly of a sweeping robot according to an embodiment of the present application. Referring to Figure 10 , in this embodiment of the present application, the moving member 30 and the fixed axis assembly 20 can also be connected by a screw-fit, with the screwing axis of the screw-fit being tilted relative to the axial direction of the rotating main shaft 10.

[0113] Specifically, the movable member 30 may include a guide shaft 32', which may replace the inclined turntable 32 and the connecting shaft 33 described above, and connect the transmission slider 31 described above. The guide shaft 32' may have an inclined annular groove 320, the center axis of which is inclined relative to the axial direction of the rotating main shaft 10, and the screwing axis of the screwing fit between the movable member 30 and the fixed axis assembly 20 may coincide with the center axis of the inclined annular groove 320.

[0114] Moreover, the fixed axis assembly 20 may include an inner sleeve 21' and a guide ball 22'. The inner sleeve 21' can be connected to the second axis end of the rotating main shaft 10 through a shaft rod not shown in the accompanying drawings, and is subject to a rotation-stopping constraint at the second axis end, so that the inner sleeve 21' can remain in a stationary state or a rotation-stopping state during the rotation of the rotating main shaft 10. The inner sleeve 21' is provided with a ball accommodating through hole 210 that passes through the cylinder wall. The guide ball 22' can be rollingly accommodated in the ball accommodating through hole 210 and spherically matched with the inclined annular groove 320 covered by the inner sleeve 21'.

[0115] Based on the above structure, the spherical fit between the guide ball 22' and the inclined annular groove 320 is used to guide the screwing of the movable member 30 relative to the fixed axis assembly 20, and the movable member 30 can generate reciprocating movement in response to the change in the spherical fit position between the guide ball 22' and the inclined annular groove 320.

[0116] In addition, the fixed axis assembly 20 may further include an outer sleeve 23 ′, and the outer sleeve 23 ′ may be sleeved on the outer side of the inner sleeve 21 ′ and cover the guide balls 22 ′ to prevent the guide balls 22 ′ from falling off from the bevel annular groove 320 and the ball receiving through hole 210 .

[0117] The above is a detailed description of the roller brush assembly in the embodiment of the present application. In another embodiment of the present application, a sweeping robot using the roller brush assembly is also provided.

[0118] Figure 11 is a schematic diagram of the partial structure of the sweeping robot in an embodiment of the present application. Figure 12 is a schematic diagram of the structure of the integrated cavity shell of the sweeping robot in an embodiment of the present application. Referring to Figures 11 and 12, the sweeping robot in an embodiment of the present application may include a mobile chassis 70 (only the chassis panel of the mobile chassis 70 is shown in the figure for exemplary representation), an integrated cavity shell 60 supported by the mobile chassis 70, and the roller brush assembly described in the aforementioned embodiment.

[0119] The mobile chassis 70 has a chassis opening 700, the integrated chamber shell 60 has a hoisting window 61 exposed at the chassis opening 700, the roller brush assembly is installed in the integrated chamber shell 60, and the installation position of the roller brush assembly in the integrated chamber shell 60 enables the cleaning brush 40 to extend out of the hoisting window 61 to perform a hoisting operation during the rotation of the rotating main shaft 10 relative to the fixed axis assembly 20.

[0120] The integrated cavity shell 60 is also fixedly equipped with a drive motor 81. The first shaft end of the rotating main shaft 10 can be connected to the drive motor 81 (for example, through a reduction mechanism 82). In addition, the fixed axis assembly 20 inserted into the hollow axis cavity 100 of the rotating main shaft 10 from the second shaft end opposite to the first shaft end can be fixed in the integrated cavity shell 60.

[0121] For example, the integrated housing 60 may include a roller brush chamber 600 for accommodating a roller brush assembly, the hoisting window 61 is in communication with the roller brush chamber 600, and the opposite side walls of the roller brush chamber 600 respectively include a support shaft seat 63 and a power shaft seat 64, wherein:

[0122] The first shaft end of the rotating main shaft 10 (e.g., the driving end cover 14) can be mounted on the power shaft seat 64, the input shaft of the reduction mechanism 82 is connected to the drive motor 81, and the output shaft of the reduction mechanism 82 is located on the power shaft seat 64. In addition, the first shaft end of the rotating main shaft 10 (e.g., the driving end cover 14) can be coaxially connected to the output shaft of the reduction mechanism 82 on the power shaft seat 64;

[0123] The second shaft end of the rotating main shaft 10 (such as the limiting end cover 13) can be installed on the support shaft seat 63, which has a stop notch 65, and the stop shaft end 211 of the fixed shaft assembly 20 can be locked by the stop notch 65 at the support shaft seat 63.

[0124] FIG13 is a schematic diagram of the docking structure between the integrated chamber housing and the dust collection member shown in FIG12. Referring to FIG13 and referring back to FIG12, in an embodiment of the present application, the integrated chamber housing 60 may further include a suction window 62 for communicating with the dust collection mechanism. For example, the suction window 62 may communicate with the roller brush chamber 600, and the suction window 62 may be equipped with a channel assembly 66 for docking with the dust collection mechanism.

[0125] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A roller brush assembly for a sweeping robot, characterized in that: include: A rotating spindle (10), the rotating spindle (10) being provided with a cleaning brush (40) extending radially from an outer shaft wall, the rotating spindle (10) further comprising a hollow shaft cavity (100), and a mounting slit (15) penetrating from the outer shaft wall to the hollow shaft cavity (100), the mounting slit (15) extending along the axial direction of the rotating spindle (10), and the mounting slit (15) and the cleaning brush (40) being arranged in a staggered manner; A cutting assembly (50), the cutting assembly (50) comprising a fixed tooth row component (51) fixedly inserted in the installation slit (15), and a movable tooth row component (52) movably inserted in the installation slit (15), the fixed tooth row component (51) comprising a plurality of fixed teeth (510) protruding outside the outer shaft wall, and the movable tooth row component (52) comprising a plurality of movable teeth (520) protruding outside the outer shaft wall; A fixed shaft component (20), the fixed shaft component (20) being inserted into the hollow shaft cavity (100); a moving member (30), the moving member (30) being movably mounted in the hollow shaft cavity (100) along the axial direction, and the moving member (30) being drivingly connected to the fixed shaft assembly (20) and the movable gear row member (52); Wherein, during the period when the rotating main shaft (10) drives the cleaning brush (40), the cutting assembly (50) and the movable member (30) to rotate relative to the fixed axis assembly (20), the transmission connection causes the movable member (30) to generate a reciprocating movement in the axial direction, and the reciprocating movement drives the movable teeth (520) to perform a cutting movement that is reciprocatingly offset relative to the fixed teeth (510) in the axial direction.

2. The roller brush assembly according to claim 1, characterized in that: The rotating main shaft (10) further comprises a plurality of guide comb teeth (17) spaced apart and distributed along the axial direction on the outer shaft wall, so as to form a guide channel spanning the installation slit (15) between every two adjacent guide comb teeth (17); The fixed teeth (510) and the guide comb teeth (17) are aligned with each other in the axial direction; The reciprocating displacement movement stroke of the movable tooth (520) relative to the fixed tooth (510) is greater than the channel width of the guide channel in the axial direction.

3. The roller brush assembly according to claim 2, characterized in that: The guide comb teeth (17) are distributed at intervals at the slit edges on two opposite sides of the installation slit (15) in the slit width direction.

4. The roller brush assembly according to claim 3, characterized in that: The guide comb teeth (17) have comb tooth side walls that are flush with the edges of the slits; The fixed teeth (510) are aligned and pressed against the comb tooth side wall of the guide comb teeth (17) at the edge of the slit on one side, and the movable teeth (520) are slidably matched with the comb tooth side wall of the guide comb teeth (17) at the edge of the slit on the other side.

5. The roller brush assembly according to claim 1, characterized in that: The fixed tooth row component (51) comprises a fixed tooth installation strip (511) fixed in the installation slit (15), and the fixed tooth teeth (510) protrude from the outer side edge of the fixed tooth installation strip (511) close to the outer shaft wall outside the outer shaft wall of the rotating main shaft (10); The movable gear row component (52) comprises a movable gear mounting strip (521) movably mounted in the mounting slit (15), and the movable gear teeth (520) protrude from the outer side edge of the movable gear mounting strip (521) close to the outer shaft wall outside the outer shaft wall of the rotating main shaft (10); The movable tooth row component (52) further comprises a movable tooth transmission arm (523) extending from the movable tooth mounting strip (521) close to the inner side edge of the hollow shaft cavity (100) into the hollow shaft cavity (100), and the movable tooth transmission arm (523) is in transmission connection with the movable component (30).

6. The roller brush assembly according to claim 5, characterized in that: The fixed tooth row component (51) further comprises a fixed tooth mounting lug (512) extending from the inner side of the fixed tooth mounting strip (511) close to the hollow shaft cavity (100) into the hollow shaft cavity (100), and the fixed tooth mounting strip (511) is fixed in the mounting slit (15) by the fixed connection between the fixed tooth mounting lug (512) and the rotating main shaft (10) in the hollow shaft cavity (100); The movable tooth row component (52) further comprises a movable tooth mounting lug (522) extending from the inner side of the movable tooth mounting strip (521) close to the hollow shaft cavity (100) into the hollow shaft cavity (100), and the movable tooth mounting strip (521) is movably mounted in the mounting slit (15) by movably assembling the movable tooth mounting lug (522) with the rotating main shaft (10) in the hollow shaft cavity (100) along the axial direction.

7. The roller brush assembly according to claim 6, characterized in that: The fixed tooth mounting lug (512) is provided with a circular hole, and the movable tooth mounting lug (522) is provided with a long hole extending along the axial direction; The rotating spindle (10) further comprises a mounting boss (16) located in the hollow shaft cavity (100), and the mounting boss (16) is used for threaded connection with a mounting stud (53) penetrating the circular hole and the long hole; The plug-in fit between the mounting stud (53) and the circular hole enables the fixed tooth mounting lug (512) to be fixedly connected to the rotating main shaft (10) in the hollow shaft cavity (100), and the sliding fit between the mounting stud (53) and the long hole enables the movable tooth mounting lug (522) to be movably assembled with the rotating main shaft (10) along the axial direction in the hollow shaft cavity (100).

8. The roller brush assembly according to claim 1, characterized in that: The moving member (30) is fixedly clamped to the rotating main shaft (10) in the rotation direction of the rotating main shaft (10) relative to the fixed shaft assembly (20), so as to constrain the moving member (30) to rotate synchronously with the rotating main shaft (10).

9. The roller brush assembly according to claim 8, characterized in that: The rotating spindle (10) further comprises a sliding keyway (180) located in the hollow shaft cavity (100); The moving member (30) has a radial convex key (311) inserted into the sliding key groove (180); The relative positions of the radial cam (311) and the sliding keyway (180) in the rotation direction of the rotating main shaft (10) relative to the fixed shaft assembly (20) are fixed, and the sliding keyway (180) provides a fitting margin for the radial cam (311) to slide in the axial direction.

10. The roller brush assembly according to claim 9, characterized in that: The rotating main shaft (10) further comprises an inner liner column shell (18) fixed in the hollow shaft cavity (100), and the sliding key groove (180) is opened on the cylindrical side wall of the inner liner column shell (18); The moving member (30) includes a transmission slider (31) located in the shell cavity of the liner column shell (18), and the radial convex key (311) protrudes from the transmission slider (31) toward the first slider side wall of the sliding key slot (180).

11. The roller brush assembly according to claim 1, characterized in that: The movable tooth row component (52) further comprises a movable tooth transmission arm (523) inserted into the hollow shaft cavity (100); The movable member (30) realizes transmission connection with the movable tooth row member (52) by fixing and clamping the movable tooth transmission arm (523) in the axial direction, and the fixed clamping constrains the movable tooth transmission arm (523) to trigger the cutting movement of the movable tooth (520) in response to the reciprocating movement of the movable member (30).

12. The roller brush assembly according to claim 11, characterized in that: The movable member (30) has a retaining groove (315), the movable tooth transmission arm (523) is inserted into the retaining groove (315), the relative positions of the retaining groove (315) and the movable tooth transmission arm (523) in the axial direction are fixed, and the groove width dimension of the retaining groove (315) perpendicular to the axial direction has an expansion margin relative to the movable tooth transmission arm (523).

13. The roller brush assembly according to claim 12, characterized in that: The rotating main shaft (10) further comprises an inner liner column shell (18) fixed in the hollow shaft cavity (100), and the shell cavity of the inner liner column shell (18) is communicated with the installation slit (15); The moving member (30) comprises a transmission slider (31) located in the shell cavity of the liner column shell (18), and the retaining groove (315) is located on a second slider side wall of the transmission slider (31) facing the installation slit (15).

14. The roller brush assembly according to claim 1, characterized in that: The moving member (30) and the fixed axis assembly (20) are connected in transmission via eccentric contact, and the contact position of the eccentric contact deviates from the rotation axis of the rotating main shaft (10) relative to the fixed axis assembly (20).

15. The roller brush assembly according to claim 14, characterized in that: The moving member (30) comprises an inclined turntable (32), the inclined turntable (32) is inclined relative to the rotation axis, and the turntable center of the inclined turntable (32) is coaxially arranged with the rotation axis; The fixed axis assembly (20) has an eccentric protrusion (23) deviating from the rotation axis, and the eccentric protrusion (23) contacts the turntable edge of the inclined turntable (32); The inclined turntable (32) generates the reciprocating movement in response to the change in the contact position between the turntable edge and the eccentric protrusion (23) during the rotation.

16. The roller brush assembly according to claim 15, characterized in that: The fixed axis assembly (20) comprises a fixed axis body (21) and a cylindrical sleeve (22), wherein the fixed axis body (21) has a rotation-stopping axis end (211) located outside the hollow axis cavity (100) and a guide axis end (212) inserted into the hollow axis cavity (100), and the cylindrical sleeve (22) is fixedly mounted on the guide axis end (212); The eccentric protrusion (23) comprises an axial end arc surface boss (231) located on the end surface of the guide shaft end (212), and a sleeve arc surface convex block (232) located on the inner wall of the box cavity of the cylindrical sleeve (22); The tilting turntable (32) is located in the cylindrical casing (22), and during the rotation: A first position area of ​​the turntable edge of the inclined turntable (32) contacts the shaft end arc-surface boss (231) to cause the moving component (30) to make a first translational movement away from the fixed axis assembly (20) in the axial direction; The second position area of ​​the turntable edge of the inclined turntable (32) contacts the sleeve arc surface protrusion (232) to cause the moving member (30) to perform a second translational movement in the axial direction close to the fixed axis assembly (20); Wherein, the starting position of the first position area and the ending position of the second position area are both the first edge position of the turntable edge farthest from the guide shaft end (212) in the axial direction; and the ending position of the first position area and the starting position of the second position area are both the second edge position of the turntable edge closest to the guide shaft end (212) in the axial direction.

17. The roller brush assembly according to claim 16, characterized in that: The moving component (30) further comprises a transmission slider (31) which is used for transmission connection with the movable gear row component (52) and is fixedly clamped with the rotating main shaft (10) in the rotation direction of the rotating main shaft (10) relative to the fixed shaft assembly (20); The transmission slider (31) is located outside the cylindrical casing (22), and the moving member (30) further comprises a connecting shaft (33), and the connecting shaft (33) penetrates the cylindrical casing (22) and is connected between the center of the rotating disk of the inclined rotating disk (32) and the transmission slider (31).

18. The roller brush assembly according to claim 1, characterized in that: The moving member (30) and the fixed axis assembly (20) are connected in transmission through a screw fit, and the screw axis of the screw fit is tilted relative to the axial direction.

19. The roller brush assembly according to claim 18, characterized in that: The moving member (30) comprises a guide rotating shaft (32'), the guide rotating shaft (32') having an inclined annular groove (320), the central axis of the inclined annular groove (320) being inclined relative to the axial direction, and the screwing axis of the screwing fit coincides with the central axis of the inclined annular groove (320); The fixed axis assembly (20) comprises an inner sleeve (21') and a guide ball (22'), wherein the inner sleeve (21') is provided with a ball receiving through hole (210) penetrating the sleeve wall, and the guide ball (22') is rollably received in the ball receiving through hole (210) and spherically matched with the inclined annular groove (320) covered by the inner sleeve (21'); The spherical fit between the guide ball (22') and the inclined annular groove (320) is used to guide the screwing of the movable member (30) relative to the fixed axis assembly (20), and the movable member (30) generates the reciprocating movement in response to the change in the spherical fit position between the guide ball (22') and the inclined annular groove (320).

20. The roller brush assembly according to claim 19, characterized in that: The fixed axis assembly (20) further comprises an outer sleeve (23'), and the outer sleeve (23') is sleeved on the outer side of the inner sleeve (21') and covers the guide ball (22').

21. The roller brush assembly according to claim 1, characterized in that: The rotating main shaft (10) comprises at least two mounting slits (15) arranged at a preset phase interval; The cutting assembly (50) comprises at least two groups of the fixed tooth row components (51) and the movable tooth row components (52), wherein each group of the fixed tooth row components (51) and the movable tooth row components (52) is inserted into a corresponding one of the installation slits (15).

22. The roller brush assembly according to claim 21, characterized in that: The rotating main shaft (10) comprises a first semi-cylindrical shell (11) and a second semi-cylindrical shell (12); the cylindrical surfaces of the first semi-cylindrical shell (11) and the second semi-cylindrical shell (12) are complementary; the first semi-cylindrical shell (11) and the second semi-cylindrical shell (12) are snap-fitted and spliced; a pair of the cleaning brushes (40) are fixedly clamped by a seam between the first semi-cylindrical shell (11) and the second semi-cylindrical shell (12); and the hollow shaft cavity (100) is surrounded by the first semi-cylindrical shell (11) and the second semi-cylindrical shell (12); The rotating main shaft (10) comprises two mounting slits (15) respectively opened in the first semi-cylindrical shell (11) and the second semi-cylindrical shell (12), the phase interval between the two mounting slits (15) is 180°, and the two mounting slits (15) are located in the symmetry plane between a pair of cleaning brushes (40).

23. A sweeping robot, characterized in that: The invention comprises a mobile chassis (70), an integrated cavity shell (60) carried by the mobile chassis (70), and a roller brush assembly according to any one of claims 1 to 22, wherein the roller brush assembly is installed in the integrated cavity shell (60), wherein: The movable chassis (70) has a chassis opening (700), the integrated chamber shell (60) has a hoisting window (61) exposed at the chassis opening (700), and a suction window (62) for communicating with a dust collecting mechanism, and the installation position of the roller brush assembly in the integrated chamber shell (60) enables the cleaning brush (40) to extend out of the hoisting window (61) during the rotation process to perform a hoisting operation; The integrated cavity shell (60) is fixedly provided with a driving motor (81), the first shaft end of the rotating main shaft (10) is drivingly connected to the driving motor (81), the fixed shaft assembly (20) is inserted into the hollow shaft cavity (100) of the rotating main shaft (10) from a second shaft end opposite to the first shaft end, and the fixed shaft assembly (20) is fixed in the integrated cavity shell (60).

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